CN109392104A - It is a kind of to exempt from the processing method and processing device that data are transmitted in licensed band - Google Patents

Abstract

The present application discloses a method and device for processing data transmission in a license-exempt frequency band, which are used to solve the problem of how to make a terminal device know the uplink and downlink data transmission time in the license-exempt frequency band when there is no CRS in a communication system. The method includes: an access network device determines a downlink data transmission time period and/or an uplink data transmission time period within a time range in which license-exempt frequency band resources can be used; the access network device sends public control information to the terminal device, the The common control information is used to indicate the downlink data transmission period and/or the uplink data transmission period.

Description

A method and device for processing data transmission in a license-exempt frequency band

technical field

The present application relates to the field of communication technologies, and in particular, to a method and device for processing data transmission in a license-exempt frequency band.

Background technique

The license-free frequency band is a frequency band that can be used free of charge. When the wireless communication system occupies the license-free frequency band, it needs to use the listen before talk (LBT) rule. The use of license-exempt frequency bands for data transmission by communication equipment is opportunistic, and the time available for data transmission in license-exempt frequency bands is limited. Taking a long term evolution (Long Term Evolution, LTE) base station as an example, after an LTE base station competes for a license-exempt frequency band resource, it can use the license-exempt frequency band resource for uplink and downlink data transmission within a limited time range.

In the current fourth generation (the 4th generation, 4G) communication system, the licensed assisted access LTE system (licensed-assisted access using LTE, LAA-LTE) is a communication system that can operate in a license-exempt frequency band. In the future fifth generation (the 5th generation, 5G) communication system, the communication system based on new radio (new eadio, NR) is also a communication system that can use license-exempt frequency band resources for data communication. In the discussion of the LAA-LTE system, the starting position of the downlink data transmission time is determined by detecting a common reference signal (CRS). For future communication systems, such as LTE further evolved systems (also known as 4.5G evolution systems), 5G communication systems, etc., in order to save system overhead, CRS is not always available or even not available, so it will not be possible to pass blind detection of CRS. Whether to determine the uplink and downlink data transmission time on the unlicensed frequency band.

SUMMARY OF THE INVENTION

The present application provides a method and device for processing data transmission on an unlicensed frequency band, to solve the problem of how to make a terminal device know the uplink and downlink data transmission time on the unlicensed frequency band when there is no CRS in a communication system.

In a first aspect, the present application provides a method for processing data transmission in a license-exempt frequency band, the method comprising:

The access network equipment determines the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used;

The access network device sends common control information to the terminal device, where the common control information is used to indicate the downlink data transmission time period and/or the uplink data transmission time period.

In this way, the access network device can notify the terminal device of the uplink and downlink data transmission time periods within the time range of the license-exempt frequency band resources, so as to solve the problem of how to make the terminal device know the uplink and downlink data on the license-exempt frequency band when there is no CRS in the communication system. row data transfer time.

In a possible design, the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or the uplink data transmission time period, The second indication information is used to indicate a data transmission period type corresponding to the first indication information, and the data transmission period type includes a downlink data transmission period type and an uplink data transmission period type.

The above design of multiplexing the first indication information to time-division to indicate the uplink and downlink data transmission time periods can save signaling overhead on the one hand, and ensure detection reliability on the other hand.

In a possible design, the common control information includes third indication information, where the third indication information is used to indicate the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period Downlink data transmission time period; wherein, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time of the first time unit The length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position;

The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. For at least one of the second time units, M and K are integers not less than 1.

Using the above-mentioned multiplexing of the third indication information to time-division to indicate two parts of the downlink data transmission time period can also save signaling overhead and ensure detection reliability.

In a possible design, the common control information further includes fourth indication information, where the fourth indication information is used to indicate the uplink data transmission time period. By using the fourth indication information to indicate the uplink data transmission time period, detection reliability can be ensured.

In a possible design, the fourth indication information is further used to indicate the type of downlink data transmission time period corresponding to the third information; or, the common control information further includes fifth indication information, the The fifth indication information is used to indicate the downlink data transmission period type corresponding to the third information; the downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type Time period type.

Using the fourth indication information to distinguish the part of the downlink data transmission time period indicated by the third indication information can also save signaling overhead and ensure detection reliability.

In a possible design, the common control information is carried in the C-PDCCH. In this way, the demodulation of the common control information can be made independent of the CRS.

In a possible design, the downlink data transmission time period includes N third time units for downlink data transmission, and the third time units include at least two fourth time units for downlink data transmission , the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The common control information is located in a control area included in at least one of the N third time units. In this way, downlink control signaling overhead can be saved.

In a possible design, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and M and K are integers not less than 1;

The common control information is used to indicate the downlink data transmission time period, including: the common control information is used to indicate the downlink data transmission time corresponding to at least one of the first time units in the M first time units part;

The method further includes: sending, by the access network device, terminal device specific information to the terminal device, where the terminal device specific indication information is used to indicate at least one of the second time units in the K second time units The downlink data transmission time period corresponding to the unit. In this way, the effect of saving signaling overhead can also be achieved.

In a possible design, the uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1;

The common control information is used to indicate the uplink data transmission time period, including: the common control information is used to indicate the uplink data transmission time period corresponding to the L first time units;

The method further includes: sending, by the access network device, terminal device specific information to the terminal device, where the terminal device specific indication information is used to indicate that at least one of the P second time units is used for the second time unit. The uplink data transmission time period corresponding to the time unit. In this way, the effect of saving signaling overhead can also be achieved.

In a second aspect, the present application provides a method for processing data transmission in a license-exempt frequency band, the method comprising:

The terminal device receives the public control information sent by the access network device;

The terminal device determines, according to the public control information, a downlink data transmission time period and/or an uplink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources.

In a possible design, the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or the uplink data transmission time period, The second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes a downlink data transmission period type and an uplink data transmission period type;

The terminal device determines, according to the public control information, the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources, including:

If, according to the second indication information, the terminal device determines that the first indication information corresponds to the downlink data transmission time period, the terminal device determines the downlink data transmission time according to the first indication information part;

If, according to the second indication information, the terminal device determines that the first indication information corresponds to the uplink data transmission time period, the terminal device determines the uplink data transmission time according to the first indication information part.

In a possible design, the common control information includes third indication information, where the third indication information is used to indicate the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period Downlink data transmission time period;

The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time length of the first time unit is not less than the first time unit. The time length of two time units, and the first time unit and the second time unit do not overlap in time position;

The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. At least one of the second time units, M is an integer not less than 1;

The terminal device determines, according to the public control information, a downlink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources, including:

The terminal device determines, according to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period.

In a possible design, the common control information further includes fourth indication information, where the fourth indication information is used to indicate the uplink data transmission time period;

The terminal device determines, according to the public control information, an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including:

The terminal device determines the uplink data transmission time period according to the fourth indication information.

In a possible design, the fourth indication information is further used to indicate a downlink data transmission period type corresponding to the third information, and the downlink data transmission period type includes the first downlink data transmission a time period type and the second downlink data transmission time period type;

The terminal device determines, according to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period, including:

If, according to the fourth indication information, the terminal device determines that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time period according to the third indication information. Line data transmission time period;

If, according to the fourth indication information, the terminal device determines that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data according to the third indication information transmission time period;

or,

The common control information also includes fifth indication information, where the fifth indication information is used to indicate the downlink data transmission time period type corresponding to the third information;

The terminal device determines, according to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period, including:

If, according to the fifth indication information, the terminal device determines that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time period according to the third indication information. Line data transmission time period;

If, according to the fifth indication information, the terminal device determines that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data according to the third indication information Transmission time period.

In a possible design, the common control information is carried in the C-PDCCH.

In a possible design, the downlink data transmission time period includes N third time units for downlink data transmission, and the third time units include at least two fourth time units for downlink data transmission , the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The common control information is located in a control area included in at least one of the N third time units.

In a possible design, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and M is an integer not less than 1;

The terminal device determines, according to the public control information, a downlink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources, including:

The terminal device determines, according to the common control information, a downlink data transmission time period corresponding to at least one of the first time units in the M first time units in the downlink data transmission time period;

The method also includes:

receiving, by the terminal device, terminal device specific information sent by the access network device;

The terminal device determines, according to the specific indication information of the terminal device, a downlink data transmission time period corresponding to at least one of the second time units in the K second time units in the downlink data transmission time period.

In a possible design, the uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1;

The terminal device determines, according to the public control information, an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including:

The terminal device determines, according to the common control information, an uplink data transmission time period corresponding to the L first time units in the uplink data transmission time period;

The method also includes:

receiving, by the terminal device, terminal device specific information sent by the access network device;

The terminal device determines, according to the specific indication information of the terminal device, an uplink data transmission time period corresponding to at least one of the second time units in the P second time units in the uplink data transmission time period.

The implementation and beneficial effects of the above-mentioned second aspect or any one of the second aspects can be referred to each other with respect to the implementation and beneficial effects of the above-mentioned first aspect or any one of the design of the method, and the repetitions are made. No longer.

In a third aspect, the present application provides a method for processing data transmission in a license-exempt frequency band, the method comprising:

The access network device determines a time range in which the license-exempt frequency band resources can be used, and the time range includes a time unit for downlink data transmission and/or a time unit for uplink data transmission;

The access network device sends control information to the terminal device, where the control information is used to indicate the time range;

The access network device sends first information to the terminal device, where the first information is used to indicate a data transmission direction corresponding to a time unit within the time range, and the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction Data transfer direction.

In this way, the access network device can notify the terminal device of the uplink and downlink data transmission time periods within the time range of the license-exempt frequency band resources, so as to solve the problem of how to make the terminal device know the uplink and downlink data on the license-exempt frequency band when there is no CRS in the communication system. row data transfer time.

In a possible design, the time range is determined by the access network device according to the first CCA result;

The method also includes:

When the data transmission direction corresponding to the time unit within the time range is changed from the uplink data transmission direction to the downlink data transmission direction, the idle state of the unlicensed frequency band channel is re-determined by the access network device according to the second CCA result , or directly determined by the access network device to be in an idle state;

and / or,

The idle state of the unlicensed frequency band channel corresponding to the time unit for uplink data transmission included in the time range is re-determined by the terminal device corresponding to the time unit according to the second CCA result, or directly by the terminal device corresponding to the time unit. Determined to be idle;

Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA.

In a possible design, the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or,

Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA.

Through the above design, the problem of unlicensed frequency band resources being preempted by other devices that may be caused by device re-listening can be avoided.

In a possible design, the control information is carried in the C-PDCCH. In this way, the demodulation of the common control information can be made independent of the CRS.

In a possible design, the time unit for downlink data transmission includes N third time units within the time range, the third time units include at least two fourth time units, and the The time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The control information is located in a control area included in at least one of the N third time units. In this way, the effect of saving downlink control signaling overhead can be achieved.

In a fourth aspect, the present application provides a method for processing data transmission in a license-exempt frequency band, the method comprising:

The terminal device receives the control information sent by the access network device, and determines, according to the control information, a time range in which the access network device can use the license-exempt frequency band resources; the time range includes a time unit for downlink data transmission and/or time unit for uplink data transmission;

The terminal device receives the first information sent by the access network device, and determines, according to the first information, a data transmission direction corresponding to a time unit within the time range, where the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction Data transfer direction.

In a possible design, the time range is determined by the access network device according to the first CCA result;

The method further includes: when the terminal device uses the time unit included in the time range for uplink data transmission, the idle state of the unlicensed frequency band channel corresponding to the time unit is determined by the terminal device according to the second CCA. The result is re-determined, or the terminal device is directly determined to be in an idle state;

Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA.

In a possible design, the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or,

Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA.

In a possible design, the control information is carried in the common physical downlink control channel C-PDCCH.

In a possible design, the time unit for downlink data transmission includes N third time units within the time range, the third time units include at least two fourth time units, and the The time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The control information is located in a control area included in at least one of the N third time units.

The implementation and beneficial effects of the above-mentioned fourth aspect or any one of the fourth aspects can be referred to each other with respect to the implementation and beneficial effects of the above-mentioned third aspect or any one of the design methods, and the repetitions are made. No longer.

In a fifth aspect, the present application provides an access network device, and the access network device has a function of implementing the behavior of the access network device in practice in any of the above-mentioned first aspect or the method described in the first aspect of the present application. The described functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the access network device includes a processor and a transceiver, and the processor is configured to support the access network device to perform the first aspect or any design of the first aspect The corresponding function in the method is that the transceiver is used to support the communication between the access network device and the terminal device, and send to the terminal device the first aspect or any one of the first aspects involved in designing the method. information or instructions. The access network device may also include a memory, which is coupled to the processor and stores necessary program instructions and data for the access network device.

In a sixth aspect, the present application provides a terminal device, the terminal device having a function of implementing the behavior of the terminal device in practice in any one of the above-mentioned second aspect or the design method of the second aspect. The described functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the terminal device includes a processor and a transceiver, and the processor is configured to support the terminal device to perform the above-mentioned second aspect or any one of the design methods of the second aspect. Correspondingly, the transceiver is used to support the communication between the terminal equipment and the access network equipment.

In a seventh aspect, the present application provides a communication system, where the system includes the access network device described in the fifth aspect and the terminal device described in the sixth aspect.

In an eighth aspect, the present application also provides a computer-readable storage medium for storing computer software instructions used for performing the functions designed in any of the above-mentioned first aspect and the first aspect, which includes a computer software instruction for performing the above-mentioned first aspect. In one aspect, a program designed by any one of the design methods of the first aspect.

In a ninth aspect, the present application also provides a computer-readable storage medium for storing computer software instructions for executing the functions of any one of the above-mentioned second aspect and the second aspect. A program designed by any one of the design methods of the second aspect and the second aspect.

In a tenth aspect, the present application provides an access network device, the access network device having a function of implementing the behavior of the access network device in the third aspect or any of the methods described in the third aspect. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the access network device includes a processor and a transceiver, and the processor is configured to support the access network device to perform the above third aspect or any design of the third aspect The corresponding function in the method is that the transceiver is used to support the communication between the access network device and the terminal device, and send to the terminal device the above third aspect or any one of the third aspects involved in designing the method. information or instructions. The access network device may also include a memory, which is coupled to the processor and stores necessary program instructions and data for the access network device.

In an eleventh aspect, the present application provides a terminal device, the terminal device having the function of implementing the behavior of the terminal device in the actual design method of the fourth aspect or the fourth aspect. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the terminal device includes a processor and a transceiver, and the processor is configured to support the terminal device to perform the fourth aspect or any of the methods in the design of the fourth aspect. Correspondingly, the transceiver is used to support the communication between the terminal equipment and the access network equipment.

In a twelfth aspect, the present application provides a communication system, where the system includes the access network device described in the tenth aspect above and the terminal device described in the eleventh aspect above.

In a thirteenth aspect, the present application further provides a computer-readable storage medium for storing computer software instructions for executing the functions designed in any one of the third aspect and the third aspect, which contains instructions for executing the above-mentioned functions. A program designed by any one of the design methods of the third aspect and the third aspect.

In a fourteenth aspect, the present application further provides a computer-readable storage medium for storing computer software instructions for executing the functions designed in any one of the fourth aspect and the fourth aspect, including the computer software instructions for executing the above-mentioned functions. A program designed by any one of the design methods of the fourth aspect and the fourth aspect.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by some embodiments of the present application;

2 is a schematic diagram of a self-contained time slot structure;

FIG. 3(a) is a schematic diagram of a downlink data transmission time period in some embodiments of the present application;

FIG. 3(b) is a schematic diagram of a downlink data transmission time period in some embodiments of the present application;

FIG. 3(c) is a schematic diagram of time slots including mini-slots in some embodiments of the present application;

4 is a schematic diagram of a frame structure on an unlicensed frequency band in some embodiments of the present application;

5 is a schematic flowchart of a method for processing data transmission in a license-exempt frequency band provided by some embodiments of the present application;

FIG. 6 is a schematic diagram of the application of some embodiments of the present application in a specific scenario;

FIG. 7 is a schematic diagram of the application of further embodiments of the present application in a specific scenario;

FIG. 8 is a schematic diagram of the application of further embodiments of the present application in a specific scenario;

FIG. 9 is a schematic flowchart of a method for processing data transmission in a license-exempt frequency band provided by further embodiments of the present application;

10 is a schematic diagram of a time range in which a license-exempt frequency band can be used in some embodiments of the present application;

FIG. 11 is a schematic diagram of the application of some embodiments of the present application in a specific scenario;

12 is a schematic structural diagram of a processing apparatus on an access network device side provided by some embodiments of the present application;

FIG. 13 is a schematic structural diagram of a processing apparatus on the terminal device side provided by some embodiments of the present application;

FIG. 14 is a schematic structural diagram of a processing apparatus on the device side of an access network provided by further embodiments of the present application;

FIG. 15 is a schematic structural diagram of a processing apparatus on a terminal device side provided by further embodiments of the present application;

FIG. 16 is a schematic structural diagram of an access network device provided by some embodiments of the present application;

FIG. 17 is a schematic structural diagram of a terminal device provided by some embodiments of the present application;

FIG. 18 is a schematic structural diagram of an access network device provided by further embodiments of the present application;

FIG. 19 is a schematic structural diagram of a terminal device according to further embodiments of the present application.

Detailed ways

The present application provides a method and device for processing data transmission on an unlicensed frequency band, to solve the problem of how to make a terminal device know the uplink and downlink data transmission time on the unlicensed frequency band when there is no CRS in a communication system. Wherein, the method and the device are based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated places will not be repeated.

In order to facilitate the understanding of the solutions provided by the embodiments of the present application, some terms involved in the present application are briefly introduced below:

1. License-free frequency band resources: Free-to-use frequency band resources, and different devices can share resources on the license-free frequency band. Resource sharing on a license-exempt frequency band means that the use of a specific frequency spectrum only stipulates restrictions on indicators such as transmit power and out-of-band leakage, so as to ensure that the basic coexistence requirements are met between multiple devices that use the frequency band together, and the radio is not limited. technology, operating enterprise and years of use, but do not guarantee the quality of business on them. Operators can use unlicensed frequency band resources to achieve the purpose of network capacity distribution, but they need to comply with the regulatory requirements for unlicensed frequency band resources in different regions and different spectrums. These requirements are usually formulated to protect public systems such as radar, and to ensure that multiple systems coexist without harmful effects on each other as much as possible, including transmit power limits, out-of-band leakage indicators, indoor and outdoor use restrictions, and some geographical There are some additional coexistence strategies etc. Taking the 5GHz license-free frequency band opened by various governments as an example, its coexistence specifications include transmit power control (TPC), dynamic frequency selection (DFS), channel occupied bandwidth, and listen before talk (listen before talk). , LBT) rules, etc.

2. LBT rules: The European Telecommunications Standards Institute (ETSI) has issued ETSI EN 301 893, which specifies LBT rules for the use of license-exempt frequency band resources. According to the provisions of ETSI EN 301 893, communication equipment needs to use the LBT rule when using the license-exempt frequency band to communicate, that is, first monitor whether the channel on the license-exempt frequency band is free, that is, whether it can detect whether the nearby node is occupying the channel to send data, if If the channel is idle for a period of time, the communication device can use the channel to transmit data, but the time for occupying the channel is limited, and within the limited time range, the communication device does not need to perform idle evaluation on the channel; If it is detected that the channel is occupied, the communication device is currently unable to transmit data on the channel.

The above detection process is called clear channel assessment (CCA), and the communication device may perform CCA by means of signal detection, energy detection, etc., to determine whether the monitored channel is free. Among them, when CCA is performed by the signal detection method, if no specific signal is detected, the channel can be considered as idle; when the CCA is performed by the energy detection method, if the received or detected energy is lower than a certain threshold, the channel can be considered as idle. The channel is considered to be idle.

The specific numerical value of the restricted time range in which the above-mentioned communication equipment can use the license-exempt frequency band resources is related to the definitions of local regulations or standards. For example, according to Japanese regulations, the time limit of the limit can be 4ms; according to European regulations, the time limit of the limit can be 13ms or 10ms; according to the 3rd generation partnership project (3GPP) standard agreement, the limit of The time range can be 2ms, 4ms, 6ms or 8ms, 10ms.

For the convenience of description, in the present application, the limited time range in which the above-mentioned communication device can use the license-exempt frequency band resources is also referred to as a maximum channel occupancy time (MCOT).

Generally, there are two ways of LBT: one is a listening mechanism with random backoff, and the other is a listening mechanism without random backoff (one shot listening mechanism). Generally speaking, in the MCOT, the device can use the one shot listening mechanism, that is, if the device 1 competes for the right to use the license-exempt frequency band through the LBT, then in the MCOT after the device 1 competes for the resource, the device 2 can use the one shot. The listening mechanism determines whether the license-exempt frequency band resources that the device 1 has competed for can continue to be used. Among them, there is a certain subordinate relationship between device 1 and device 2, for example, device 1 can be an access network device, and device 2 can be a terminal device.

In addition, the multiple involved in this application refers to two or more; the words "first" and "second" described in this application are only used to distinguish the description, and are not used to indicate or imply relative importance , and are not used to indicate or imply order.

The present application will be further described in detail below with reference to the accompanying drawings.

In order to solve the problem of how to make the terminal equipment know the uplink and downlink data transmission time on the unlicensed frequency band when there is no CRS in the communication system, the embodiment of the present application proposes a solution based on the communication system shown in FIG. 1 .

As shown in FIG. 1 , some embodiments of the present application provide a communication system 100 . The communication system 100 includes at least one access network device 101 and at least one terminal device (user equipment, UE) 102. The UE 102 may be connected to the access network device 101 through an air interface, and the access network device 101 may manage uplink (UL) data transmission and downlink (DL) data transmission of the UE 102 . The uplink data transmission represents the communication from the UE 102 to the access network device 101 , and the downlink data transmission represents the communication from the access network device 101 to the UE 102 .

In this embodiment of the present application, the communication system (the communication system 100 shown in FIG. 1 ) may be various radio access technology (radio access technology, RAT) systems, such as code division multiple access (code division multiple access, CDMA) , time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency-division multiple access, OFDMA), single carrier frequency division multiple access (single carrier frequency division multiple access) FDMA, SC-FDMA) and other systems, etc. The term "system" is interchangeable with "network". In addition, the communication system 100 may also be applicable to future-oriented communication technologies. As long as the communication system using the new communication technology supports data transmission in the unlicensed frequency band, the technical solutions provided by the embodiments of the present application are applicable.

In the embodiment of the present application, the access network device (as shown in FIG. 1 , the access network device 101 ) is a device deployed in a radio access network (radio access network, RAN) to provide a wireless communication function for the UE. equipment. The access network equipment may be a base transceiver station (base transceiver station, BTS) in a GSM system or CDMA, a base station (nodeB, NB) in a WCDMA system, or an evolved base station (evolutional nodeB) in an LTE system. , eNB or eNodeB), the LTE standard base station may include a macro base station, a metropolitan cell (metro cell), a micro cell (microcell), a pico cell (pico cell), a femto cell (femto cell), and may also include a wireless backhaul ( wireless backhaul) base stations, such as relays, etc. The access network device may also be an access point, a vehicle-mounted device, a transmission point, a wearable device, and a device on the access network side in a future 5G network or in a future evolved public land mobile network (Public Land Mobile Network, PLMN). The device on the access network side, or any device that undertakes the function of the access network, etc.

In the embodiments of the present application, the terminal device (UE 102 shown in FIG. 1 ) may also be referred to as a terminal, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, user agent, or user device, etc. The terminal device may be a cellular phone, a cordless phone, a smart phone, a wireless data card, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant, PDA), tablet computer, laptop computer, machine type communication (MTC) terminal, handheld device with wireless communication capabilities, in-vehicle device, wearable device, computing device, or other device connected to a wireless modem Processing equipment, terminals in the future 5G network or terminals in the future evolved PLMN network, etc. For convenience of description, in the embodiments of the present application, the above-mentioned devices are collectively referred to as terminal devices or UEs.

It should be noted that the number and type of the access network devices 101 and UE 102 included in the communication system 100 shown in FIG. 1 is only an example, and the embodiment of the present application is not limited to this. More terminal devices that communicate with access network devices, and more access network devices. In addition, the communication system 100 is not limited to include the access network device 101 and the UE 102, for example, it may also include core network devices or other devices for carrying virtualized network functions, which will not be described in detail in this application.

It should be understood that the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Personnel should understand that, with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The embodiments of the present application mainly relate to application scenarios of license-exempt frequency bands. According to the constraints of the LBT rules, in the embodiment of the present application, it will be opportunistic for the devices in the communication system to use the license-exempt frequency band resources for data transmission. For the communication system 100 shown in FIG. 1 , whether it is the access network device 101 sending downlink data or the UE 102 sending uplink data, it is often necessary to perform listening before using the license-exempt frequency band resources for data transmission, which makes Data transmission by the access network device 101 and the UE 102 on unlicensed frequency bands is opportunistic.

In the embodiment of the present application, after the access network equipment competes for the license-exempt frequency band resources, within the limited time range of the MCOT, it can adaptively determine the license-exempt frequency band for downlink data transmission according to the uplink and downlink data transmission requirements. Downlink data transmission time and uplink data transmission time for uplink data transmission.

For example, in some embodiments of the present application, after the access network device determines the right to use the unlicensed frequency band channel, the entire MCOT can be used for downlink data transmission, that is, the time length of the entire MCOT is used as the downlink data transmission time period; The network access device can use the entire MCOT for uplink data transmission, that is, the time length of the entire MCOT is used as the uplink data transmission time period; or, the access network device can first perform downlink data transmission within the time range of the MCOT, and then perform uplink data transmission. Data transmission, that is, dividing the time length of MCOT into a downlink data transmission time period for downlink data transmission and an uplink data transmission time period for uplink data transmission; or, within the time range of MCOT, access network equipment can also perform Multiple alternating downlink data transmission and uplink data transmission, that is, dividing the time length of the MCOT into multiple alternating downlink data transmission time periods and uplink data transmission time periods; and so on.

In the description of the embodiments of the present application, the time when the access network device uses the license-exempt frequency band resource to perform downlink data transmission and/or uplink data transmission may be regarded as a primary frame structure. For example, in the MCOT, if the access network device determines that all the time resources included in the MCOT are used for downlink data transmission, it can be considered that the frame structure only includes downlink time units; for another example, in the MCOT, the access network device determines Part of the time resources included in the MCOT are used for downlink data transmission, and part of the time resources are used for uplink data transmission, so it can be considered that the frame structure includes both a downlink time unit and an uplink time unit; for another example, in the MCOT, the access network equipment If it is determined that only uplink data transmission is included in the MCOT, it can be considered that the frame structure includes only uplink time units, wherein the downlink time unit represents the time unit used for downlink data transmission, and the uplink time unit represents the time unit used for uplink data transmission.

It can be seen that since the access network device can adaptively determine the downlink data transmission time and the uplink data transmission time on the license-exempt frequency band according to the uplink and downlink data transmission requirements, the access network device can adaptively select the frame structure mode, That is, the frame structure of the communication system supporting the license-exempt frequency band on the license-exempt frequency band is flexible.

If the terminal equipment can be made to know the frame structure on the unlicensed frequency band in advance, that is, the uplink and downlink data transmission time on the unlicensed frequency band can be known in advance, then the following beneficial effects can be obtained: First, the terminal equipment can be enabled to use the unscheduled uplink data The downlink data detection is not performed during the transmission time period, so as to achieve the effect of power saving. Second, the terminal equipment can perform channel state information (channel state information, CSI) measurement in the correct downlink data time period. The third is to enable the terminal equipment to determine the type of LBT. Generally speaking, assuming that the access network equipment competes for the right to use the license-exempt frequency band through LBT, the terminal equipment can use the MCOT after the access network equipment competes for resources. The one shot listening mechanism determines whether the license-exempt frequency band resources competed by the access network equipment can continue to be used, wherein the one shot listening mechanism is an implementation of a listening mechanism without random backoff. However, due to the flexibility of the frame structure on the unlicensed frequency band, how to enable the terminal device to know the frame structure on the unlicensed frequency band, so as to achieve the above beneficial effects, has become a problem to be solved.

In the current LAA-LTE system, blind detection of the presence or absence of CRS can be used to determine the starting position of uplink and downlink data transmission in the unlicensed frequency band, and combined with control information to determine the end position of downlink data transmission and the time occupied by uplink data transmission. In future communication systems (such as LTE further evolved systems (also known as 4.5G evolution systems), 5G communication systems, etc.), in order to save system overhead, CRS is not always present or even absent, so it is impossible to detect CRS blindly. Whether or not to determine the start of downlink data transmission time on unlicensed bands. The technical solutions provided by the embodiments of the present application are mainly used to solve the above problems. Therefore, the communication systems involved in the embodiments of the present application mainly include 4.5G, 5G, and future evolution communication systems.

In order to reduce the communication delay, a self-contained slot structure is introduced into the 5G communication system. symbols and symbols used for upstream data transmission. For example, FIG. 2 shows an example of a self-contained time slot structure, and the self-contained time slot structure of the example includes a part for DL data transmission, a part for uplink and downlink switching, and a part for UL data transmission. An example of the application of the time slot structure may be, for example, that the terminal equipment performs hybrid automatic repeat request acknowledgement (hybrid automatic repeat request acknowledgement) on the downlink data received in the downlink data transmission time period in the time slot during the uplink data transmission time period. , HARQ-ACK), HARQ-ACK includes acknowledgement (acknowledgement, ACK) and negative acknowledgement (negative acknowledgement, NACK).

Based on the time slot structure shown in Figure 2 and considering the absence of CRS, in the discussion of the NR communication system that can use unlicensed frequency band resources in the 5G communication system, it is supported to pass the group common physical downlink control channel (group common physical downlink control channel). Downlink control channel, Group Common PDCCH) carries the relevant information of the time slot structure. Through the relevant information of the time slot structure, the terminal device can deduce which symbols in the time slot are used for downlink data transmission and which symbols are used for uplink data transmission. , or for other purposes, etc. The set of common physical downlink control channels may exist in each time slot. Although the structure of the current time slot is notified through the group common physical downlink control channel of each time slot, the uplink and downlink data transmission time on the unlicensed frequency band can be determined when there is no CRS, but the signaling overhead is relatively large.

In order to solve the above problem, enable the terminal equipment to know the uplink and downlink data transmission time on the license-exempt frequency band when there is no CRS in the communication system, and save signaling overhead at the same time. The transmission first considers the following two aspects:

On the one hand, since the data transmission of the device in the license-exempt frequency band is opportunistic, for the license-exempt frequency band, optionally, the data transmission in the license-exempt frequency band is generally a communication service that does not have strict requirements on delay. It is different from the requirements of ultra-reliable low latency communication (URLLC) in the 5G communication system. Therefore, even if the NR communication system uses a license-free frequency band for data communication, it is not necessary to use the above-mentioned 5G communication system. Self-contained slot structure for low latency;

On the other hand, in the unlicensed frequency band, even within MCOT, if DL and UL are switched frequently, it will not only lead to the introduction of additional time switching points of DL and UL, and increase the system overhead, but also, at each switching point, Before and after, due to the change of the device using the unlicensed band, the device may need to re-listen to determine whether the unlicensed band resource is available, which may cause the unlicensed band resource to be used by other devices within the listening time range. seize;

Considering the above two aspects, in the embodiment of the present application, a possible form of the frame structure on the unlicensed frequency band is proposed, and the possible form is: continuous downlink data transmission followed by a continuous uplink data transmission.

Specifically, in the description of the embodiments of the present application, it is assumed that the time unit on the license-exempt frequency band resource is a time period with a certain duration, and the duration corresponding to different time units may be different or the same, which is not specifically limited. For example, in the LTE system, the time unit may be, for example, a slot, a time slot includes a set number of symbols, and the time unit may also be a subframe; in the 5G communication system, in order to reduce the delay , the concept of mini-slot is introduced. Compared with the concept of time-slot in LTE system (same subcarrier spacing), the time length of mini-slot is either the same as that of time slot, or smaller than that of time slot. length of time. Generally speaking, the number of symbols included in one mini-slot is not greater than the number of symbols included in one time slot, and the mini-slot may also include control signals, and the time unit may also be a mini-slot, and so on.

Correspondingly, the time length of the continuous downlink data transmission in the possible forms of the above-mentioned frame structure of the present application can be specifically expressed as being composed of X time units, or it can also be said that the continuous downlink data transmission time period in the possible forms of the above-mentioned frame structure. It includes X time units for downlink data transmission, where X is an integer not less than 1. It should be noted that, the time length of each time unit in the X time units used for downlink data transmission may be the same or different.

For example, FIG. 3( a ) shows an example of a downlink data transmission time period in some embodiments of the present application, and the time period of continuous downlink data transmission includes a time unit with a shorter time length at the beginning b1, two time units a1 and a2 with longer time length during continuous downlink data transmission, and one time unit b2 with shorter time length at the end, and these two time units b1 with shorter time length The time lengths of the two time units b1 and b2 are different. In other words, the two time units b1 and b2 have different time lengths for downlink data transmission.

Similarly, the time length of continuous uplink data transmission in the possible forms of the above-mentioned frame structure of the present application can be specifically expressed as being composed of Y time units, or, it can also be said that the continuous uplink data transmission time period in the possible forms of the above-mentioned frame structure. It includes Y time units for uplink data transmission, where Y is an integer not less than 1. It should be noted that, the time length of each time unit in the Y time units used for uplink data transmission may be the same or different.

For example, FIG. 3(b) shows an example of an uplink data transmission time period in some embodiments of the present application. In the time period of continuous uplink data transmission, a time unit with a shorter time length at the beginning is included d1, two time units c1 and c2 with longer time length during continuous uplink data transmission, and one time unit d2 with shorter time length at the end, and these two time units d1 with shorter time length The time lengths of d2 and d2 are different, or in other words, the time lengths used by the two time units d1 and d2 for uplink data transmission are different.

Optionally, in some embodiments of the present application, the time length of the time unit used for uplink data transmission and the time length of the time unit used for downlink data transmission may be the same or different, and details are not repeated.

In order to distinguish the time units b1, b2 and a1, a2 included in the above-mentioned downlink data transmission time period, and to distinguish the time units d1, d2 and time units c1, c2 included in the above-mentioned uplink data transmission time period, in this In the description of the application embodiments, time units such as time units a1, a2 and time units with longer time lengths such as time units c1, c2 are referred to as first time units, and time units such as time units b1, b2, time units d1, A time unit with a shorter time length such as d2 is referred to as a second time unit. It can be seen that the first time unit is a time unit with a certain time length, and the second time unit is a time unit that is shorter in time length than the first time unit and does not overlap with the first time unit in time position. .

It should be noted that, for the downlink data transmission time period, when the second time unit is the last time unit included in the downlink data transmission time period, the time length of the second time unit may also be the same as the time length of the first time unit. . In addition, it should be noted that two time units that do not overlap in time position means that the time regions corresponding to the two time units do not have overlapping regions. For example, the time units in Fig. 3(a) can be regarded as non-overlapping time units, and the time units in Fig. 3(b) can also be regarded as non-overlapping time units.

For example, the first time unit may be a time slot, a mini-slot, or a time period formed by several consecutive orthogonal frequency division multiplexing (OFDM) symbols, etc. ; When the first time unit is a time slot and is a specific time slot in the time domain, the second time unit may be a mini-slot located after or before the time slot, a time period formed by several consecutive OFDM symbols Wait. For another example, for a 4.5G LTE system, the time length of the first time unit may be equal to 1 ms, and the time length of the second time unit may be less than 1 ms; for a 5G communication system, the time length of the first downlink time unit may be equal to 1 hour. The time length of a slot (slot), and the time length of the second downlink time unit may be less than the time length of one slot. An exception is that in this embodiment of the present application, when the second time unit is the last time unit included in the downlink data transmission time period, the time length of the second time unit may be the same as the time length of the first time unit. In addition, in this embodiment of the present application, the time lengths of different second time units included in the downlink data transmission time period may be the same or different; the time lengths of different second time units included in the uplink data transmission time period may be the same, Can also be different.

Further, as described above, in the LTE system, a time slot (slot) can be used as a time unit, which can contain control signals; in a 5G communication system, a mini-slot (mini-slot) can also be used as a time unit, which can also contain control signals. signal, and the time length of the mini-slot is less than or equal to the time length of the time slot, since the mini-slot can be used to schedule data, the mini-slot can be used for scheduling in the slot, which can reduce the scheduling delay, especially For NR systems. FIG. 3( c ) shows an example situation in which the time slots include mini-slots in some embodiments of the present application.

As shown in Figure 3(c), a slot includes three mini-slots, and the time lengths of the three mini-slots can be the same, such as mini-slot1 and mini-slot2, or different, such as mini-slot2 and mini -slot3. Among them, the control area marked with "B" indicates the control area corresponding to the slot, and the control area marked with "A" indicates the control area corresponding to the mini-slot. The control area of the slot and the control area of the mini-slot 1 it includes may overlap. Or no overlap (as shown in Fig. 3(c)).

It should be noted that the control area distribution in FIG. 3(c) is only a schematic diagram. For a given time unit, the control area and service data area included in the time unit can be distributed in a time division multiplexing (Time Division Multiplexing, TDM) manner. , and can also be distributed in a frequency division multiplexing (Frequency Division Multiplexing, FDM) manner.

In order to distinguish time units such as slots and mini-slots, which all have control signal regions within their time lengths and have different time lengths, as described above, in the description of the embodiments of the present application, such as slot The time unit that can be used to schedule data and has several mini-slots is called the third time unit, and the time units of these mini-slots included in the slot that can also schedule data are called the fourth time unit. It can be seen that both the third time unit and the fourth time unit can schedule data independently, that is, both the third time unit and the fourth time unit may include control information for scheduling uplink and/or downlink data, as well as the scheduled downlink data. and/or uplink data; the time length of the fourth time unit is smaller than the time length of the third time unit, and the third time unit includes at least two time units of the fourth time unit. Further, when there are multiple third time units (such as Slots), the distribution of the fourth time units included in different third time units may be different.

For example, the third time unit may include the concepts of the first time unit and the second time unit, such as a time period, time slot, subframe, etc. formed by several OFDM symbols; for example, in the first time unit When the three time units are time slots, the fourth time unit may be each minislot included in the time slot.

It should be understood that, in this embodiment of the present application, any time unit among the above-mentioned first time unit, second time unit, third time unit, and fourth time unit has the following characteristics: it can indicate that it is used for downlink The time unit of data transmission can also represent the time unit used for uplink data transmission; when the indicated data transmission directions are different, the time length of the time unit can be the same or different, that is, the time unit used for downlink data transmission The time length of the time unit used for uplink data transmission may be the same or different, which is not limited in this application.

In order to more clearly illustrate the possible forms of the frame structure on the unlicensed frequency band described in the above embodiments of the present application, FIG. 3 shows an example of the frame structure on the unlicensed frequency band in some embodiments of the present application.

In the example shown in FIG. 4 , the frame structure on the unlicensed frequency band sequentially includes the initial part of downlink data transmission (the part a of downlink data transmission shown in FIG. 4 , which includes at least one mini-slot (mini-slot). -slot) or orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols), a continuous part of downlink data transmission (the part b of downlink data transmission shown in FIG. 4, which includes multiple downlink slots), downlink data transmission The end part of the transmission (the downlink data transmission part c shown in Figure 4, which contains at least one mini-slot or OFDM symbol), the uplink and downlink switching part, and part of the uplink data transmission part (including at least one mini-slot or OFDM symbol) And the continuous uplink data transmission part (including multiple uplink slots);

Based on the foregoing description of the first time unit and the second time unit, in the example shown in FIG. 4 , the downlink data transmission is taken as an example, and the first time unit is used as a time slot, then the downlink data transmission shown in FIG. 4 The three time slots included in part b can be regarded as three consecutive first time units, and part b of downlink data transmission is the downlink data transmission time period formed by these three first time units, as shown in FIG. 4 . The time unit less than one time slot included in the downlink data transmission part a and the downlink data transmission part c shown in FIG. 4 can be regarded as the second time unit, and the downlink data transmission part a and the downlink data transmission part c can be They are respectively considered to be downlink data transmission time periods formed by a second time unit, and the time lengths are different;

Correspondingly, based on the foregoing description of the third time unit and the fourth time unit, in the example shown in FIG. 4 , it is assumed that the downlink data transmission part a includes A mini-slots, and each time period in the downlink data transmission part b is Each slot includes B mini-slots, and the c part of the downlink data transmission includes C mini-slots, then these mini-slots can be considered as the fourth time unit, each time in the downlink data transmission part a and the downlink data transmission part b. Both the slot and the part c of the downlink data transmission may be regarded as the third time unit.

It should be understood that FIG. 4 is only an example of the frame structure on the unlicensed frequency band provided by some embodiments of the present application, and in some scenarios, the frame structure on the unlicensed frequency band may only include the downlink data transmission part, or only the uplink The data transmission part, or including a plurality of alternate uplink and downlink data transmission parts, the possible examples of these frame structures still conform to the aforementioned possible forms, that is, after continuous downlink data transmission, according to continuous uplink data transmission, this application will not list them one by one .

It should be noted that, for a 5G communication system that introduces a self-contained time slot structure in order to reduce the time delay, optionally, the NR communication system therein may adopt the possible form of the frame structure on the above-mentioned license-exempt frequency band.

Based on the above description of possible forms of the frame structure on the license-exempt frequency band in the embodiments of the present application, the following describes the processing solutions for data transmission on the license-exempt frequency band provided by some embodiments of the present application with reference to FIG. 5 .

In step 501, the access network device may first determine the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used.

Specifically, in some embodiments of the present application, the access network device may determine the time range of the available license-exempt frequency band resources according to the CCA listening result; or, in some embodiments of the present application, the access network may The terminal device served by the device determines the time range of the available license-exempt frequency band resources according to the CCA listening result, and then the terminal device notifies the access network device of the time range of the license-exempt frequency band resources that can be used.

In some scenarios of the embodiments of the present application, after the access network device obtains the channel use right of the license-exempt frequency band, it may only transmit DL data but not UL data transmission, and the access network device may use the license-exempt frequency band resources. The duration of the MCOT is all the downlink data transmission time period; in other scenarios, after the access network device obtains the channel use right of the unlicensed frequency band, it may only transmit UL data without DL data transmission, then the access network device may only transmit UL data. The duration of the MCOT that can use the license-exempt frequency band resources can be used as the uplink data transmission time period; in other scenarios, after the access network device obtains the channel use right of the license-exempt frequency band, it may transmit both DL data and UL data. transmission, the access network device may divide the duration of the MCOT that can use the license-exempt frequency band resources into a downlink data transmission time period and an uplink data transmission time period according to data transmission requirements.

It should be understood that the above-mentioned determination of the duration of the MCOT as the downlink data transmission time period or all of the determination as the uplink data transmission time period can be considered as dividing the duration of the MCOT into the downlink data transmission time period and the uplink data according to the data transmission requirements. There are two special cases in the transmission time period. The former can be considered as the duration of the downlink data transmission period is MCOT, the duration of the uplink data transmission period is zero, and the latter can be considered as the duration of the downlink data transmission period is zero, The duration of the uplink data transmission period is MCOT.

It should be noted that, in the embodiments of this application, the license-exempt frequency band resources that can be used refer to the license-exempt frequency band resources that the access network equipment competes for through the CCA mechanism, such as LBT; It means that within this time range, the access network device can use the license-exempt frequency band resource for data transmission, where the data transmission includes sending downlink data and/or receiving uplink data. In addition, after the access network equipment competes for the license-exempt frequency band resources, the determined time range in which the license-exempt frequency band resources can be used may be less than or equal to the MCOT.

After the access network device determines the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used, it can perform step 502 to send the public control information to the terminal equipment. The information is used to indicate the downlink data transmission period and/or the uplink data transmission period. It should be noted that the downlink data transmission time period here refers to the time range or time length used for downlink data transmission within this time range; the uplink data transmission time period refers to the time range used for uplink data transmission within this time range. A time frame or length of time.

Further, in step 503, the terminal device can receive the public control information sent by the access network device, so as to determine, according to the public control information, the downlink within the time range in which the access network device can use the license-exempt frequency band resources Data transmission time period and/or uplink data transmission time period.

In some embodiments of the present application, in step 503, the terminal device may directly determine the start position of the downlink data transmission time period in the MCOT when detecting the public control information, and then according to the detected public control information The content indicated in , determine the duration of the downlink data transmission period and/or the duration of the uplink data transmission period.

It can be seen that in the process shown in Figure 5, the access network device sends the public control information to indicate the uplink and downlink data transmission time periods on the license-exempt frequency band, so that the terminal device can be able to use the CRS without relying on the detection of the CRS. Know the time period for uplink and downlink data transmission on the license-exempt frequency band.

After the terminal equipment is informed of the uplink and downlink data transmission time periods on the license-exempt frequency band in the above manner, the terminal equipment can be prevented from performing downlink detection in the unscheduled uplink data transmission time period, thereby achieving the effect of power saving. In addition, the terminal device can also perform smooth measurement of channel state information (CSI) within the determined correct downlink data time period; in addition, the terminal device can also determine the correct uplink data time period. Inside, the LBT that performs the one shot listening mechanism or does not perform the listening.

In order to realize the above-mentioned indication of the uplink and downlink data transmission time period in the MCOT, that is, the notification of the frame structure on the license-exempt frequency band, in some embodiments of the present application, the public control information can be implemented in at least the following two ways:

Mode 1. The multiplexing bit (bit) field time-division indicates the downlink data transmission time period and the uplink data transmission time period;

Mode 2: A bit field is used to indicate the downlink data transmission time period, and another bit field may be further used to indicate the uplink data transmission time period.

In order to more clearly illustrate the public control information in some embodiments of the present application under the above two modes, the following will describe the public control information in some embodiments of the present application in mode 1 and mode 2, respectively.

Way 1:

In some embodiments of the present application, the common control information sent by the access network device to the terminal device in step 502 may include first indication information and second indication information. The first indication information may be used to indicate a downlink data transmission period or an uplink data transmission period, that is, the common control information indicates the time range of the downlink data transmission period and the uplink data transmission time-divisionally by multiplexing the first indication information. The time range of the time period; the second indication information can be used to indicate the data transmission time period type corresponding to the first indication information, and the data transmission time period type includes the downlink data transmission time period type and the uplink data transmission time period type, that is, the common The control information uses the second indication information to distinguish whether the data transmission time period currently indicated by the first indication information is a downlink data transmission time period or an uplink data transmission time period.

Further, in some embodiments of the present application, after receiving the common control information including the first indication information and the second indication information, the terminal device firstly determines the corresponding first indication information according to the second indication information. The data transmission time period type, so that when it is determined that the first indication information corresponds to the downlink data transmission time period, the downlink data transmission time period can be determined according to the first indication information, and when it is determined that the first indication information corresponds to the downlink data transmission time period During the uplink data transmission time period, the uplink data transmission time period is determined according to the first indication information. In other words, after receiving the common control information including the first indication information and the second indication information, the terminal device can determine, according to the second indication information, that the data transmission time period corresponding to the first indication information is downlink data transmission The time range corresponding to the time period is also the time range corresponding to the uplink data transmission time period. It can be understood that the second indication information is used to indicate the type of data transmission period corresponding to the first indication information, that is, used to indicate whether the first indication information indicates a downlink data transmission period or an uplink data transmission period.

It should be noted that when multiplexing the first indication information time-division indicates whether the data transmission time period is the downlink data transmission time period or the uplink data transmission time period, the time granularity used to indicate the downlink data transmission time period and the time granularity used to indicate the uplink data transmission time period. The time granularity of the transmission period can vary. For example, when the first indication information indicates the downlink data transmission time period, the corresponding time granularity can be expressed by the number of slots, and when the first indication information indicates the uplink data transmission time period, the corresponding time granularity can be expressed by the number of slots. Number of mini-slots. For example, when the terminal device determines that the corresponding content is 3 according to the first indication information, if the first indication information indicates the downlink data transmission time period, the terminal device can determine that the downlink data transmission time period consists of 3 time slots, However, if the first indication information indicates an uplink data transmission time period at this time, the terminal device may determine that the uplink data transmission time period consists of three mini-slots.

Specifically, in some embodiments of the present application, since the common control information time-divisionally indicates the downlink data transmission time period and the uplink data transmission time period by multiplexing the first indication information, the frame on the license-exempt channel described above is Based on the possible forms of the structure, the first indication information in the common control information may first indicate the downlink data transmission time period, and then indicate the uplink data transmission time period.

For example, assuming that the access network device determines that the time range (such as MCOT) that can be used for the licensed unlicensed frequency band resources is a continuous downlink data transmission followed by a continuous uplink data transmission (as shown in the preceding Figure 4), then, The first indication information in the public control information first sent by the access network device to the terminal device may indicate the time range of the downlink data transmission time period, which is identified by the terminal device through the second indication information, and then the access network device sends to the terminal device. The first indication information in the common control information of , may indicate the time range of the uplink data transmission time period, which is also identified by the terminal device through the second indication information.

Considering the 4.5G evolution system and the 5G NR communication system, the data processing delay is further reduced (for example, the short transmission time interval (STTI) technology can reduce the data processing delay). Therefore, the uplink data scheduling The time interval between the signaling and the uplink data transmission scheduled by the signaling can be further shortened. In some embodiments of the present application, when the access network device indicates the uplink data transmission time period to the terminal device, it does not need to be in the uplink data transmission time Too much transmission time interval (TTI) ahead of the segment start to indicate.

Specifically, in some embodiments of the present application, the above-mentioned first indication information may be a field composed of several bits, for example, a field of 5 bits, with 32 status values; the values of these bits will be able to indicate the downlink The duration of the data transmission period or the uplink data transmission period. Correspondingly, the above-mentioned second indication information may be a preset bit, and the value of the preset bit will be able to distinguish whether the first indication information indicates a downlink data transmission time period or an uplink data transmission time period, such as setting the When the preset bit value is 0, the first indication information indicates the downlink data transmission time period, and when the preset bit value is 1, the first indication information indicates the uplink data transmission time period. Or, for another example, when the preset bit value is set to 1, the first indication information indicates the downlink data transmission time period, and when the preset bit value is 0, the first indication information indicates the uplink data transmission time period. .

It should be noted that, in this embodiment of the present application, the indicated downlink data transmission period, the indicated downlink data transmission period duration, and the time range corresponding to the indicated downlink data transmission period are consistent; similarly, the indicated uplink data transmission time The duration of the indicated uplink data transmission period and the time range corresponding to the indicated uplink data transmission period are consistent.

Taking the LAA-LTE system as an example, the downlink common control information transmitted by the access network equipment includes a control field for indicating the uplink data transmission time period, that is, the "UL duration and offset" field, then the control field can correspond to the preceding The first indication information, that is, the control field can be used to time-division to indicate the time length for downlink data transmission and the time length for uplink data transmission within the time range of available license-exempt frequency band resources.

Specifically, in some embodiments of the present application, when the first indication information indicates the downlink data transmission time period, a possible implementation is to indicate the number of time units included in the downlink data transmission time period, and the time unit here may be It is the first time unit with a long time length described above, such as indicating the number of slots included, which can save control overhead; or, another possible implementation is to indicate that the downlink data transmission time period is in the time domain , where the starting position of the downlink data transmission period in the time domain can be directly determined by the terminal device when detecting the common control information.

Correspondingly, in some embodiments of the present application, when the above-mentioned first indication information indicates the uplink data transmission period, a possible implementation is to indicate the starting position of the uplink data transmission period and the time included in the uplink data transmission period. The number of units, from the perspective of saving overhead, can only indicate the number of first time units with a longer time length, such as the number of slots; or, another possible implementation is to indicate that the uplink data transmission time period is on The start and end positions on the field.

It can be seen that the indication of the downlink data transmission time period and the uplink data transmission time period within the time range of the available license-exempt frequency band resources (for example, within the MCOT) is realized by the above-mentioned method of multiplexing the same bit field. Signaling overhead is saved, and on the other hand, detection reliability can also be guaranteed.

Method 2,

In order to realize the indication of the downlink data transmission time period within the time range in which the license-exempt frequency band resources can be used (for example, within the MCOT), in some embodiments of the present application, the access network device sends the public data to the terminal device in step 502 The control information may include third indication information, where the third indication information may be used to indicate a downlink data transmission time period.

Furthermore, in some embodiments of the present application, after receiving the above-mentioned common control information including the third indication information, the terminal device can determine the downlink data transmission time period according to the third indication information therein.

Further, in order to realize the indication of the uplink data transmission time period in the MCOT, in some embodiments of the present application, the public control information sent by the access network device to the terminal device in step 502 may include third indication information and fourth indication information, the third indication information can be used to indicate the downlink data transmission time period, and the fourth indication information can be used to indicate the uplink data transmission time period, that is, the common control information is passed through the third indication information and the fourth indication information respectively. to simultaneously indicate the duration of the downlink data transmission period and the duration of the uplink data transmission period.

Further, in some embodiments of the present application, after receiving the above-mentioned common control information including the third indication information and the fourth indication information, the terminal device can determine the downlink data transmission time period according to the third indication information, and The uplink data transmission time period is determined according to the fourth indication information therein.

Because in the possible form of the frame structure on the unlicensed frequency band as shown in Figure 4, the downlink data transmission time period starts from the downlink data transmission part a with a duration of less than one time slot, and then becomes a continuous downlink composed of several complete time slots. Part b of data transmission, and finally the same part c of downlink data transmission with a duration of less than one time slot. Considering the characteristics of downlink data transmission in this possible form, and in order to save signaling overhead, in some embodiments of this application, the When the third indication information in the public control information indicates the downlink data transmission time period, it may specifically indicate the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period; wherein , the first downlink data transmission time period is the downlink data transmission time period formed by at least one complete time unit in the downlink data transmission (such as the downlink data transmission part b in FIG. 4 ), and the second downlink data transmission time period That is, the downlink data transmission time period formed by a time unit whose duration is shorter than the complete time unit in downlink data transmission (as shown in the parts a and c of downlink data transmission in FIG. 4 ). As mentioned above, part c of downlink data transmission may also be a downlink data transmission time period formed by a time unit equal to the complete time unit in duration, wherein in the example shown in FIG. 4 , the duration of the complete time unit is It can be the length of time corresponding to one time slot.

Based on the foregoing description of the first time unit and the second time unit, in this embodiment of the present application, the above downlink data transmission time period may be described as including M first time units for downlink data transmission and K time units for downlink data transmission. In the second time unit of downlink data transmission, wherein, the time length of the first time unit is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time positions, M, K is an integer greater than 1; correspondingly, the first downlink data transmission time period may include at least one first time unit among the M first time units, and the second downlink data transmission time period may include the K at least one of the second time units.

Optionally, in some embodiments of the present application, the at least one second time unit for downlink data transmission included in the above downlink data transmission time period may specifically refer to the last time unit included in the downlink data transmission time period. . For example, in FIG. 4 , the downlink data transmission time period includes three (equivalent to M=3) first time units (corresponding to the “downlink slot” in FIG. 4 ) and two (equivalent to M=3) first time units (corresponding to the “downlink slot” in FIG. K=2) the second time unit for downlink data transmission (corresponding to the “downlink time unit containing at least one mini-slot or OFDM symbol” in FIG. 4 ), where the first downlink data transmission time period can be considered as Including the downlink data transmission part b of the three first time units, the second downlink data transmission time period can be specifically considered to include the downlink data transmission part c located at the end of the downlink data transmission.

Furthermore, in some embodiments of the present application, after receiving the common control information including the above-mentioned third indication information, the terminal device will use the third indication information therein to determine the first downlink data included in the downlink data transmission time period. The data transmission time period or the second downlink data transmission time period.

It should be noted that, in this embodiment of the present application, the indication of the first downlink data transmission period, the indication of the duration of the first downlink data transmission period, and the time range corresponding to the indication of the first downlink data transmission period are consistent. ; Similarly, the indication of the second downlink data transmission time period is consistent with the indication of the duration of the second downlink data transmission time period and the time range corresponding to the indication of the second downlink data transmission time period.

In some embodiments of the present application, in order to achieve the above-mentioned purpose of separately indicating through the third indication information, a fifth indication information (such as a preset certain bit) may be added to perform the content indicated by the third indication information. To distinguish, for example, a bit is used to indicate whether the third indication information indicates the first downlink data transmission time period or the second downlink data transmission time period. That is, in some embodiments of the present application, the above-mentioned common control information may further include fifth indication information, and the fifth indication information indicates the type of downlink data transmission time period corresponding to the third indication information, and the downlink data transmission time period The types include the first downlink data transmission period type and the second downlink data transmission period type.

Furthermore, in some embodiments of the present application, the terminal device can determine the type of the downlink data transmission time period corresponding to the third indication information according to the fifth indication information in the received public control information. The three indication information corresponds to the first downlink data transmission time period, and the terminal device can determine the first downlink data transmission time period according to the third indication information. If it is determined according to the fifth indication information that the third indication information corresponds to the first downlink data transmission time period Second downlink data transmission time period, the terminal device can determine the second downlink data transmission time period according to the third indication information. In other words, the terminal device may determine, according to the fifth indication information, whether the downlink data transmission time period indicated by the third indication information is the first downlink data transmission time period or the second downlink data transmission time period.

In still other embodiments of the present application, in order to achieve the above purpose and save signaling overhead, the fourth indication information in the above common control information may also be used to indicate the type of downlink data transmission time period corresponding to the third indication information, The downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type, that is, the fourth indication information is used to distinguish that the third indication information corresponds to the first downlink data transmission time In other words, the fourth indication information in the common control information can also be used to indicate whether the third indication information indicates the first downlink data transmission time period or the second downlink data transmission period. Data transfer time period. Specifically, for example, the redundancy state of the fourth indication information may be used to realize the distinction of the type of downlink data transmission time period corresponding to the third indication information.

Furthermore, in some embodiments of the present application, the terminal device can determine the type of downlink data transmission time period corresponding to the third indication information according to the fourth indication information in the received public control information. The third indication information corresponds to the first downlink data transmission time period, and the terminal device can determine the first downlink data transmission time period according to the third indication information; is the second downlink data transmission time period, the terminal device can determine the second downlink data transmission time period according to the third indication information, that is, the terminal device can determine the downlink data indicated by the third indication information according to the fourth indication information Whether the transmission time period is the first downlink data transmission time period or the second downlink data transmission time period. In other words, after receiving the common control information including the third indication information and the fourth indication information, the terminal device can determine, according to the fourth indication information, that the data transmission time period indicated by the third indication information is downlink data transmission The time range corresponding to the time period is also the time range corresponding to the uplink data transmission time period. It can be understood that the fourth indication information is used to indicate the type of the data transmission period corresponding to the third indication information, that is, used to indicate whether the third indication information corresponds to the downlink data transmission period or the uplink data transmission period.

For example, taking the LAA-LTE system as an example, the downlink common control information transmitted by the access network equipment includes a control field used to indicate the subframe configuration, that is, the "Subframe configuration for LAA" field and a field used to indicate uplink data transmission. The control field of the time period, that is, the "UL duration and offset" field, the former can be used to indicate the time length of the last time unit included in the downlink data transmission time period for downlink data transmission. In the LAA-LTE system, the time length Can be 1 ms, or a time length consisting of 3, 6, 9, 10, 11, 12, etc. OFDM symbols. Taking into account factors such as data processing delay in the NR system, the access network equipment does not need to notify the second downlink data transmission time period in advance within the time range for determining the available license-exempt frequency band resources, so it can reuse the The field time division indicates the first downlink data transmission time period and the second downlink data transmission time period included in the downlink data transmission time period, that is, an implementation manner of the third indication information may multiplex this field. At the same time, the reserved status or redundancy status of the "UL duration and offset" control field included in the common control information can be used to distinguish whether the third indication information indicates the first downlink data transmission time period or the second downlink data Transmission time period. Among them, the reserved state of UL duration is composed of 5 bits, which is "11111".

It can be seen that by using a bit field to indicate the downlink data transmission time period, and further using another bit field to indicate the uplink data transmission time period, since the existing fields can be reused, the signaling overhead can also be saved, and the guarantee The purpose of testing reliability.

In addition, similar to mode 1, in some embodiments of the present application, in mode 2, the above-mentioned third indication information indicates a downlink data transmission time period (including time-sharing indicating the first downlink data transmission time period and the second downlink data transmission period) time period), a possible implementation is to indicate the number of time units included in the downlink data transmission time period, where the time unit may be the first time unit with a longer time length described above, such as Indicate the number of slots included; or, another possible implementation is to indicate the termination position of the downlink data transmission period in the time domain, wherein the start position of the downlink data transmission period in the time domain can be detected by the terminal device. It is directly determined when the public control information is reached. Optionally, when the third indication information time-division indicates the first downlink data transmission time period and the second downlink data transmission time period included in the downlink data transmission time period, it is used to indicate the time of the first downlink data transmission time period. The granularity may be different from the time granularity used to represent the second downlink data transmission period. For example, when the third indication information indicates the first downlink data transmission time period, the corresponding time granularity can be represented by the number of slots, and when the third indication information indicates the second downlink data transmission time period, the corresponding time granularity can be represented by the number of slots. The time granularity of can be represented by the number of OFDM symbols. For example, when the terminal device determines that the corresponding content is 3 according to the third indication information, and if the third indication information indicates the first downlink data transmission time period, the terminal device can determine that the first downlink data transmission time period consists of 3 time slots, and if the third indication information indicates the second downlink data transmission time period, the terminal device may determine that the second downlink data transmission time period is composed of 3 OFDM symbols.

Correspondingly, in some embodiments of the present application, when the above-mentioned fourth indication information indicates the uplink data transmission time period, a possible implementation is to indicate the starting position of the uplink data transmission time period and the number of time units included, such as The number of slots; or, another possible implementation is to indicate the start position and end position of the uplink data transmission period in the time domain.

It should be understood that the above only briefly describes two implementations of the public control information, and the bit field used in the specific implementation and the content indicated by the value can be adjusted accordingly according to the actual scene, this application does not limited.

Further, based on the foregoing description of the frame structure on the unlicensed frequency band and the description of the time unit, in some embodiments of the present application, in addition to the third time unit (such as a slot), the frame structure may also include the first time unit (such as a slot). The third time unit is a fourth time unit (such as a mini-slot) with a small time length and is included in the third time unit; for example, as shown in Figure 3 (c), a slot (third time unit) includes 3 mini-slots (fourth time units), and the time lengths of these mini-slots may be the same or different, that is, the time lengths of the fourth time units included in a third time unit are different. Since the third time unit and the fourth time unit such as mini-slot may include a control region, especially for the NR system, such a structure can reduce the scheduling delay. Since both the third time unit and the fourth time unit can be used for scheduling data, they can both be regarded as scheduling time units. Wherein, both the third time unit and the fourth time unit may independently schedule data, that is, both may include control information for scheduling uplink and/or downlink data, and scheduled downlink and/or uplink data.

Furthermore, in some embodiments of the present application, for indicating the time range of the available license-exempt frequency band resources, it is not necessary to notify early, therefore, it is used to indicate the downlink data transmission time period and the uplink data transmission time period included in the time range. The common control information of the data transmission time period does not need to appear in every scheduling time unit included in the frame structure. Considering such a situation, in some embodiments of the present application, the downlink data transmission time period is described by a third time unit, That is, the downlink data transmission time period includes N third time units for downlink data transmission, and N is an integer not less than 1, then the common control information may be located in at least one third time unit in the N third time units. In the control area included in the time unit, rather than in the control area included in the fourth time unit, thereby saving downlink control signaling overhead.

For example, taking the third time unit as a slot and the fourth time unit as a mini-slot as an example, the public control information can be notified only in the control area corresponding to the slot, for example, at the start position of the slot, and does not need to be notified in the slot. The control area corresponding to the mini-slot is notified. For example, taking the situation shown in FIG. 3(c) as an example, combined with the above description, the common control information used to indicate the downlink data transmission time period and/or the uplink data transmission time period within the time range of the available license-exempt frequency band resources It can be sent only in the control area corresponding to B. It should be noted that the control area distribution in FIG. 3(c) is only a schematic diagram, corresponding to a given time unit, the control area and service data area included in the time unit can be used in a time division multiplexing (Time Division Multiplexing, TDM) manner. The distribution (as shown in Figure 3(c)) can also be distributed in a frequency division multiplexing (Frequency Division Multiplexing, FDM) manner.

In addition, if a plurality of third time units for downlink data transmission are included within the time range of the available license-exempt frequency band resources, the downlink data transmission time period within the time range of the available license-exempt frequency band resources and /or the common control information of the uplink data transmission time period may be sent in the control areas corresponding to all the third time units to ensure the robustness of the transmission of the common control information; or, the common control information may only be sent in part of the third time unit The transmission is performed in the control area corresponding to the three time units, thereby saving signaling overhead. There is no specific limitation.

It can be seen that, based on the possible form of the frame structure on the license-free channel proposed by the embodiment of this application, the uplink and downlink data transmission time periods in the frame structure are notified in the above-mentioned manner, rather than the self-contained data transmission time period in the current 5G system. The time slot structure proposed under the time slot structure is notified of the time slot structure of each time slot, so the overhead of the control channel can be effectively saved while getting rid of the dependence on the CRS.

In some embodiments of the present application, the common control information, such as the common control information implemented in any of the above manners, may be specifically carried in a common physical downlink control channel C-PDCCH (common physical downlink control channel, PDCCH). The C-PDCCH can be demodulated independently of the presence of the CRS, for example, the terminal device can detect the C-PDCCH through a demodulation reference signal (DMRS). Specifically, the common control information may be downlink control information (DCI) carried by the C-PDCCH, and the control information included in the C-PDCCH may be temporarily identified (Radio Network Temporary Indentification, RNTI) scrambling implementation.

In some embodiments of the present application, when detecting the common control information, the terminal device may directly determine the starting location information of the time period notified by the common control information, and then according to the information indicated by the common control information content, and determine the duration of the downlink data transmission period and/or the duration of the uplink data transmission period.

For example, when the common control information is carried by the C-PDCCH, the terminal device can determine the downlink data transmission period or the starting point of the uplink data transmission period by blindly detecting the presence or absence of the C-PDCCH, and then according to the indication in the C-PDCCH content, determine the time length of the downlink data transmission period and/or the uplink data transmission period, and determine the starting point of the uplink data transmission period. Furthermore, in the downlink data transmission time period indicated by the C-PDCCH, the terminal equipment can perform smooth measurement of CSI, or detect whether there is downlink transmission data; in the uplink data transmission time period indicated by the C-PDCCH, the terminal equipment can perform high Priority LBT, such as one shot LBT or it can be determined that during this time period, license-exempt frequency band resources can be directly used without performing LBT. Here, the high-priority LBT may refer to an LBT mechanism that does not include random backoff, or may be other LBT mechanisms that are easier to compete for license-exempt frequency band resources, which is not specifically limited here.

In some embodiments of the present application, whether it is a downlink data transmission time period within a time range in which license-exempt frequency band resources can be used, or an uplink data transmission time period, the time period indicated in the common control information may specifically have a relatively high frequency. It is measured in units of a first unit of time (eg, a time slot) of long duration. For example, in mode 1, the common control information first indicates the time length corresponding to the first time unit included in the downlink data transmission time period (for example, expressed by the number of first time units), and then indicates the time length included in the uplink data transmission time period. The time length corresponding to the first time unit (for example, represented by the number of first time units); in mode 2, the first time unit included in the downlink data transmission time period and the uplink data transmission time period are simultaneously indicated by the common control information Included first time unit. However, for the part of the downlink data transmission time period whose time length is smaller than the first time unit (for example, the start a part and the end part c of the downlink data transmission shown in FIG. 4 ), in some embodiments of the present application, the access network The device can also notify the terminal device by using the terminal device specific information, which can also achieve the effect of saving signaling overhead.

For example, in some embodiments of the present application, it is assumed that the downlink data transmission time period includes M first time units for downlink data transmission (as shown in FIG. 4 , the downlink data transmission part b, which includes M=3 the first time unit) and K second time units for downlink data transmission (as shown in FIG. 4 , the parts a and c of downlink data transmission are respectively corresponding to a second time unit, K=2), then , the public control information sent by the access network device to the terminal device in step 502 can specifically be used to indicate the downlink data transmission time period corresponding to at least one of the first time units in the M first time units; further, The access network device may send terminal device specific information to the terminal device, and the terminal device specific indication information indicates a downlink data transmission time period corresponding to at least one second time unit in the K second time units, for example, access The network device respectively indicates the time lengths corresponding to the downlink data transmission part a and the downlink data transmission part c through the terminal device specific information. .

Furthermore, in some embodiments of the present application, the terminal device may first determine at least one of the to M first time units in the downlink data transmission time period according to the common control information through step 503. A downlink data transmission time period corresponding to a time unit; and further receiving terminal equipment specific information sent by the access network equipment, and determining the K second times in the downlink data transmission period according to the terminal equipment specific indication information Downlink data transmission time period corresponding to at least one second time unit in the unit.

Correspondingly, in the indication of the uplink data transmission period, in some embodiments of the present application, it is assumed that the uplink data transmission period includes L first time units for uplink data transmission and P first time units for uplink data transmission. In the second time unit, L and P are integers not less than 1. Then, the public control information sent by the access network device to the terminal device in step 502 can be specifically used to indicate the uplink data transmission corresponding to the L first time units. time period; further, the access network device may send terminal device specific information to the terminal device, and the terminal device specific indication information indicates the uplink data transmission corresponding to at least one second time unit in the P second time units period.

Furthermore, in some embodiments of the present application, the terminal device may first determine the uplink data transmission time lengths corresponding to the L first time units in the uplink data transmission time period through part of step 503 and according to the common control information; and further receive the terminal device specific information sent by the access network device, and according to the terminal device specific indication information, determine the corresponding at least one second time unit in the P second time units in the uplink data transmission time period. Uplink data transmission time length.

In order to more clearly illustrate the technical solution of indicating the uplink and downlink data transmission time periods on the license-exempt frequency band through public control information described in the above embodiments of the present application, the following describes the technical solutions provided by the embodiments of the present application with reference to FIG. 6 , FIG. 7 , and FIG. 8 . The application of the technical solution in a specific scenario is exemplarily described.

For example, based on the possible forms of the frame structure on the unlicensed frequency band as shown in FIG. 4 , FIG. 6 shows the method 1 (time-division indicating the uplink and downlink data transmission time periods by multiplexing the bit field) in some embodiments of the present application. An application example in which the implemented public control information indicates the uplink and downlink data transmission time periods on the license-exempt frequency band.

As shown in FIG. 6 , due to the multiplexing bit field used in the common control information in this application example to indicate the time period of uplink and downlink data transmission in time division, the first complete downlink slot after the initial part of downlink data transmission The public control information in the control area of indicates the downlink data transmission time period corresponding to the downlink slot located behind it, as shown in Figure 6, including 2 slots; in order to increase the robustness, in the subsequent second complete downlink slot control The public control information in the area also indicates the downlink data transmission time period corresponding to the downstream downlink slot, as shown in Figure 6, including one slot; while the public control information in the control area of the third complete downlink slot is Indicates the uplink slots included in the uplink data transmission time period, as shown in Figure 6, including 4 slots.

It can be seen that in the example shown in FIG. 6, the terminal device will be able to determine the subsequent downlink slot after detecting the public control information in the control area of the first complete downlink slot; After the public control information on the control area of the third complete downlink slot, the uplink slot in the subsequent uplink data transmission time period is determined, so that the uplink and downlink on the license-exempt frequency band can be determined in the absence of CRS Data transfer time period.

It should be noted that, in this embodiment of the present application, when the common control information indicates a downlink data transmission time period, the time length corresponding to the indicated downlink data transmission time period may include the time unit where the common control information is located, or may not Including the time unit where the common control information is located. The downlink data transmission time period indicated by the common control information given in FIG. 6 does not include an example of the time unit where the common control information is located. If it is included, in FIG. The downlink data transmission time period indicated by the common control information in the control area of a complete downlink slot may include 3 slots, and the downlink data transmission time period indicated by the common control information in the control area of the second complete downlink slot in the following Can include 2 slots.

For another example, still based on the possible form of the frame structure on the unlicensed frequency band as shown in FIG. 4 , FIG. 7 shows the common mode 2 (using a bit field to indicate the downlink data transmission time period) in some embodiments of the present application. An example of application in which the control information indicates the downlink data transmission time period on the unlicensed frequency band.

As shown in FIG. 7 , in this application example, the common control information can use a bit field to indicate the downlink data transmission time period, and can specifically indicate the first downlink data transmission time period and the second downlink data transmission time period by time division. , the public control information in the control area of the first complete downlink slot after the initial part of downlink data transmission indicates the first downlink data transmission time period corresponding to the downlink slot included in the downlink data transmission time period, As shown in Figure 7, two slots are included; in order to increase the robustness, the public control information in the control area of the second complete downlink slot also indicates the first downlink data transmission time corresponding to the subsequent downlink slot. segment, as shown in Figure 7, including 1 slot; the public control information in the control area of the subsequent third complete downlink slot indicates its subsequent second downlink data transmission time period for transmitting downlink data. Here, The second downlink data transmission time period corresponds to the "downlink time unit containing at least one mini-slot or OFDM symbol" in FIG. 7 . Same as above, the first downlink data transmission time period indicated by the common control information may include or not include the time unit where the common control information is located.

Optionally, in the control area included in the second “downlink time unit containing at least one mini-slot or OFDM symbol” in FIG. 7 , the common control information may also be included to indicate that the “contain at least one mini-slot -Slot or downlink time unit of OFDM symbol "corresponding downlink data transmission duration.

For another example, still based on the possible form of the frame structure on the unlicensed frequency band as shown in FIG. 4 , FIG. 8 shows that in some embodiments of the present application, the downlink data transmission time period is indicated by the mode 2 (a segment of bit field is used, and another An application example of indicating the uplink and downlink data transmission time periods on the license-exempt frequency band is indicated by the public control information implemented by a bit field indicating the uplink data transmission time period.

As shown in FIG. 8 , in this application example, the common control information can use a bit field to indicate the downlink data transmission time period, and can specifically indicate the first downlink data transmission time period and the second downlink data transmission time period by time division. , and the uplink data transmission time period can be indicated by the bit field at the other end, and the public control information in the control area of the first complete downlink slot after the initial part of the downlink data transmission indicates that the downlink data transmission time period is included in the The first downlink data transmission time period corresponding to the downlink slot (including 2 slots in Figure 8), and indicates the uplink slot included in the uplink data transmission time period (including 4 slots in Figure 8); Robustness, the public control information in the control area of the second complete downlink slot also indicates the first downlink data transmission time period corresponding to the subsequent downlink slot (including one slot in Figure 8) , and also indicates the uplink slot included in the uplink data transmission time period (including 4 slots in Figure 8); the public control information in the control area of the subsequent third complete downlink slot indicates its subsequent use for A second downlink data transmission time period for transmitting downlink data (as shown in "a downlink time unit containing at least one mini-slot or an OFDM symbol" in FIG. 8 ). Same as above, the first downlink data transmission time period indicated by the common control information may include or not include the time unit where the common control information is located.

Optionally, in the control region included in the second “downlink time unit containing at least one mini-slot or OFDM symbol” in FIG. 8 , the common control information may also be included to indicate that the “contain at least one mini-slot -Slot or downlink time unit of OFDM symbol "corresponding downlink data transmission duration.

It can be seen that, in the example shown in FIG. 8 , the terminal device will be able to determine the first downlink data transmission time period after detecting the common control information in the control area of the first complete downlink slot. The uplink data transmission time period and the uplink data transmission time period; and after detecting the public control information on the control area of the third complete downlink slot, the second downlink data transmission time period in the downlink data transmission time period can be determined , so that the uplink and downlink data transmission time periods on the license-exempt frequency band can be determined in the absence of CRS.

Optionally, when the access network equipment multiplexes the control information time-division to indicate the complete downlink slot part and the final end part in the downlink data transmission, the redundancy state of the control information indicating the uplink data transmission time period can be used to distinguish. Considering that the uplink data transmission time period does not need to be notified prematurely, therefore, when the control information indicating the uplink data transmission time period indicates a preset state or an invalid state (for example, a reserved state), the multiplexed control information can indicate the downlink data. The time length corresponding to the complete downlink slot part in the transmission. At this time, the control information used to indicate the uplink data transmission time period included in the common control information does not indicate the valid uplink data transmission time period length. When the time period control information indicates the valid uplink data transmission period length, eg Q slots, the multiplexed control information may indicate the downlink data transmission period length corresponding to the last end part of the downlink data transmission.

Therefore, the technical solutions provided by the above-mentioned embodiments of the present application can solve the problem of how to make the terminal equipment know the uplink and downlink data transmission time on the unlicensed frequency band when there is no CRS in the communication system, and can also save signaling overhead. By letting the terminal equipment know the uplink and downlink data transmission time on the unlicensed frequency band, the terminal equipment can not perform downlink detection in the unscheduled uplink data transmission time period, thereby saving power, and it can be in the correct downlink data time period. Perform CSI measurement, in addition, the terminal device can also determine the type of LBT that uses the one shot listening mechanism or not perform LBT within the time range of the available license-exempt frequency band resources, to determine whether it can continue to use the connection within the time range. License-free frequency band resources competed by network access devices.

Still considering the above-mentioned problem of how to make the terminal equipment know the uplink and downlink data transmission time on the license-exempt frequency band when there is no CRS in the communication system, and based on the above, the possible forms of the frame structure on the license-exempt frequency band in the embodiment of the present application are considered. For the related description, the following describes the processing solution for data transmission in the license-exempt frequency band provided by some embodiments of the present application with reference to FIG. 9 .

In step 901, the access network device may first determine a time range in which license-exempt frequency band resources can be used, and the time range includes a time unit for downlink data transmission and/or a time unit for uplink data transmission.

As mentioned above, the access network device can perform CCA to determine whether the monitored channel of the license-exempt frequency band is idle before using the license-exempt frequency band for communication, so as to obtain the right to use the license-exempt frequency band resources. Specifically, in some embodiments of the present application, the access network device may perform the first CCA first, and determine the time range in which it can use the license-exempt frequency band resources according to the first CCA result. The first CCA performed by the access network device may specifically be a CCA mechanism including random backoff, or may be a CCA mechanism not including random backoff.

In some embodiments of the present application, after the access network device obtains the channel use right of the license-exempt frequency band and determines the time range in which the license-exempt frequency band resources can be used, it can determine the available The time unit used for uplink data transmission and the time unit used for downlink data transmission within the time range of using the license-exempt frequency band resources, that is, the time period for uplink and downlink data transmission is determined. For example, in some scenarios, there may be only DL data transmission but no UL data transmission, the access network device may use all time units within the time range of the available license-exempt frequency band resources for downlink data transmission; in other scenarios In scenarios, there may be only UL data transmission but no DL data transmission, and the access network device may use all time units within the time range of the available license-exempt frequency band resources for uplink data transmission; in other scenarios, it may be If there is both DL data transmission and UL data transmission, the access network equipment can use the time unit within the time range of the available license-exempt frequency band resources for downlink data transmission time and uplink data transmission respectively according to data transmission requirements.

Based on the foregoing descriptions of the possible forms of the frame structure and the concept of time units in the embodiments of the present application, in some embodiments of the present application, the above time units may include the first time unit described above, or may include the second time unit described above. time unit, third time unit, etc.

In the process shown in FIG. 9, in order to enable the terminal device to know the time range in which the access network device can use the license-exempt frequency band resources and the uplink and downlink data transmission time within the time range, in steps 902-903, the access network device The control information used to indicate the time range can be sent to the terminal device; and the first information used to indicate the data transmission direction corresponding to the time unit within the time range can be sent to the terminal device, and the data transmission direction includes downlink data transmission direction and upstream data transmission direction.

Further, in steps 904-905, after receiving the control information sent by the access network device, the terminal device can determine the time range in which the access network device can use the license-exempt frequency band resources according to the control information; After the first information sent by the network access device, the data transmission direction corresponding to the time unit within the time range is determined according to the first information.

Specifically, in some embodiments of the present application, the control information may indicate a time range (such as MCOT) in which license-exempt frequency band resources can be used by means of specific signaling of the terminal device, or may also be a public signal. The way of making the notification indicates the time range (eg MCOT) in which the unlicensed band resources can be used.

For example, in some embodiments of the present application, when the control information is indicated in the form of public signaling, it can be specifically carried in the C-PDCCH, so that the demodulation can be performed independently of the existence of the CRS. For example, the terminal The device can detect the C-PDCCH by de-DMRS. Specifically, the control information may be DCI carried by the C-PDCCH, and the control information included in the C-PDCCH may be implemented by RNTI scrambling common to cells or common to user groups.

In some embodiments of the present application, when the control information is indicated in the form of public signaling, the time length of the time range (for example, MCOT) indicated by the control information that can use the unlicensed frequency band resources may specifically be a longer time period. The first time unit (eg, slot) of the time length is measured in units, so as to achieve the effect of saving signaling overhead. For the time unit used for downlink data transmission that is shorter than the first time unit in time length (for example, the start part a and the end part c of the downlink data transmission shown in FIG. 4 ), in some embodiments of the present application, the access network The device can also notify the terminal device by using the terminal device specific information, which can also achieve the effect of saving signaling overhead.

Similar to the foregoing, in some embodiments of the present application, in addition to a third time unit (such as a slot), the frame structure may also include a time length smaller than that of the third time unit and included in the third time unit. Within the fourth time unit (such as mini-slot), the third time unit and the fourth time unit can schedule data independently, that is, they can both include control information for scheduling uplink and/or downlink data, and scheduled downlink data. and/or upstream data. Furthermore, in some embodiments of the present application, as for the time range indicating the available license-exempt frequency band resources, it is not necessary to notify prematurely, therefore, the control information for indicating the time range does not need to be included in the frame structure. Each scheduling time unit occurs. Considering such a situation, in some embodiments of the present application, the downlink data transmission time period is described by a third time unit, that is, the downlink data transmission time period includes N time periods for downlink data transmission. The third time unit, where N is an integer not less than 1, then the control information may be located in the control area included in at least one third time unit included in the N third time units, instead of being located in the fourth time unit. In the control area included in the time unit, in order to achieve the purpose of saving downlink control signaling overhead.

For example, taking the third time unit as the slot and the fourth time unit as the mini-slot as an example, the control information can be notified only in the control area corresponding to the slot, for example, at the start position of the slot, and does not need to be notified in the mini-slot. The control area corresponding to -slo is notified. Still taking the situation shown in Fig. 3(c) as an example, in combination with the above description, the control information can be sent only in the control area corresponding to B. Similarly, if the time range of the usable license-exempt frequency band resources includes multiple third time units, the control information indicating the time range of the usable license-exempt frequency band resources can be controlled in all the third time units corresponding to the control information. To ensure robustness of the control information transmission; alternatively, the control information may be sent only in the control area corresponding to part of the third time unit, thereby saving signaling overhead. No specific limitation is made.

Specifically, in some embodiments of the present application, the first information may specifically be a reference signal, or may be information carried in a downlink control channel; furthermore, the terminal device determines the time range of the available license-exempt frequency band resources After (for example, MCOT), the available license-exempt frequency band resources can be determined by blindly detecting the presence or absence of reference signals or detecting the downlink control channel within the time range of the available license-exempt frequency band resources (for example, MCOT). The data transmission direction corresponding to each time unit included in the time range (eg, MCOT) determines whether each time unit is used for DL data transmission or UL data transmission. It should be noted that the information in the downlink control channel here includes downlink scheduling information, and may also include uplink scheduling information. When the terminal device detects the downlink scheduling information, it can determine that the time unit corresponding to the downlink scheduling information is the downlink time unit. When the terminal device detects the uplink scheduling information, it can determine that the time unit corresponding to the uplink scheduling is the uplink time unit .

Specifically, in some embodiments of the present application, when detecting the control information, the terminal device may directly determine the start of the time range (eg MCOT) of the available license-exempt frequency band resources notified by the control information Location information, according to the content indicated by the control information, the time range of the available license-exempt frequency band resources (for example, MCOT) can be determined, and then the available license-exempt frequency band resources can be determined according to the content indicated by the first information. The data transmission direction corresponding to each time unit in the time range (for example, MCOT), so that it can be determined when the downlink data transmission and when the uplink data transmission is.

Further, considering that on the unlicensed frequency band, if the switching of DL and UL occurs within the time range of the available unlicensed frequency band resources (such as MCOT), then before and after each switching point, due to the use of the unlicensed frequency band The equipment of the resource changes (for example, when switching from DL to UL, the equipment using the unlicensed frequency band resources is changed from the access network equipment to the terminal equipment; when switching from UL to DL, the equipment using the unlicensed frequency band resources is changed by The terminal device becomes an access network device), so the device will need to re-listen to determine whether the license-exempt band resources are available, and re-listening may cause the license-exempt band resources to be used by other Device preemption.

In order to avoid the above-mentioned possible problems, in some embodiments of the present application, the idle state of the unlicensed frequency band channel corresponding to the time unit of the time range of the usable unlicensed frequency band resource can be determined by the access network device and/or by the access network The terminal device served by the device is re-determined according to the result of the second CCA, the listening priority of the second CCA is higher than the listening priority of the first CCA; or in some embodiments of the present application, the access network device and/or Or the terminal equipment served by the access network equipment may not re-determine the idle state of the unlicensed frequency band channel corresponding to the time unit of the time range of the usable unlicensed frequency band resources.

Specifically, for example, in some embodiments of the present application, when the data transmission direction within the time range in which the license-exempt frequency band can be used is changed from the uplink data transmission direction to the downlink data transmission direction, the idle state of the license-exempt frequency band channel can be controlled by the connection. The network access device is directly determined to be in an idle state, and then the access network device can directly use the license-exempt frequency band resource for downlink data transmission without re-evaluating the idle state of the license-exempt frequency band channel; In the embodiment, since the access network device is the MCOT determined according to the first CCA result, when the data transmission direction in the MCOT is changed from the uplink data transmission direction to the downlink data transmission direction, the access network device can perform the listening priority. A second CCA with a higher priority than the first CCA listens, so as to re-determine the idle state of the unlicensed band channel according to the second CCA result.

For another example, in some embodiments of the present application, the idle state of the unlicensed frequency band channel corresponding to the time unit used for uplink data transmission included in the time range of the unlicensed frequency band that can be used can be determined by the terminal device corresponding to the time unit. The second CCA result is re-determined, or the terminal device corresponding to the time unit directly determines the idle state.

For example, in some embodiments of the present application, when the data transmission direction within the time range in which the license-exempt frequency band can be used is changed from the downlink data transmission direction to the uplink data transmission direction, the idle state of the license-exempt frequency band channel is determined by the access network device. The serving terminal device is directly determined to be in an idle state, and then the terminal device served by the access network device can directly use the license-exempt frequency band resource for uplink data transmission without re-evaluating the idle state of the license-exempt frequency band channel; or , in some other embodiments of the present application, the terminal device served by the access network device may execute a second CCA with a listening priority higher than that of the first CCA, so as to re-determine the license-exemption according to the second CCA result The idle state of the band channel.

For another example, in some embodiments of the present application, when the time unit used for uplink data transmission within the time range where the license-exempt frequency band can be used is used to schedule different terminal devices, the idle state of the license-exempt frequency band channel can be accessed by The terminal equipment scheduled by the network equipment is directly determined to be in an idle state, and then the scheduled terminal equipment can directly use the unlicensed frequency band resource for uplink data transmission without re-evaluating the idle state of the unlicensed frequency band channel; In still other embodiments of the present application, the terminal device scheduled by the access network device may execute a second CCA with a listening priority higher than that of the first CCA, so as to re-determine the license-exempt frequency band according to the second CCA result The idle state of the channel.

Specifically, for example, taking the time range of the available license-exempt frequency band resources as an MCOT as an example, FIG. 10 shows that the time range of the available license-exempt frequency band in some embodiments of the present application includes multiple alternate uplink and downlink data transmission times. Schematic diagram of the segment. It should be understood that the time range of the available license-exempt band resources may be equal to the MCOT, or less than the MCOT.

As shown in FIG. 10 , it is assumed that the access network device first determines the time range of the unlicensed frequency band resources that can be occupied according to the first CCA result, and the access network device first performs downlink data transmission within this time range, as shown in FIG. 10 . It is shown that the beginning part of the MCOT includes a part of continuous downlink data transmission M1; because in the embodiment of the present application, when the downlink data transmission is converted to the uplink data transmission, the license-exempt frequency band resources corresponding to the uplink data transmission time period are The idle state can be re-determined by the terminal device using the time period through the second CCA result or directly used without determination. Therefore, after the downlink data transmission, as shown in FIG. 10, a period for Up-down conversion and/or the time zone used for CCA evaluation, and then the M2 part used for uplink data transmission in this MCOT; For the time unit included in the M2 part, the terminal equipment can re-evaluate the time unit included in the M2 part corresponding to In the idle state of the license-exempt frequency band resource, if it is idle, the M2 part can be used for uplink data transmission, that is, the uplink data sent by the terminal device is received within the time range of the M2 part, or the terminal device can directly use the M2 part to perform transmission. Uplink data transmission does not need to re-determine the idle state of license-exempt frequency band resources through CCA; similarly, because in the embodiment of the present application, when uplink data transmission is converted to downlink data transmission, the license-exempt frequency band corresponding to the downlink data transmission time period The idle state of the resource can be re-determined by the access network device using the time period through the second CCA, or can be used directly without re-determination, therefore, after the uplink data transmission M2 part, as shown in FIG. 10 is also followed by a period of time for uplink and downlink conversion and/or for CCA evaluation, and then is the M3 part used for downlink data transmission again in the MCOT; similarly, for the time unit included in the M3 part, The access network device can re-evaluate the idle state of the license-exempt frequency band resource corresponding to the time unit included in the M3 part, and if it is idle, the M3 part can be used for downlink data transmission, or the access network device can directly use the M3 part for downlink data transmission. Data transmission does not need to re-determine the idle state of unlicensed frequency band resources through CCA.

It should be noted that, for the part M2 of uplink data transmission as shown in FIG. 10 , if multiple time units for uplink data transmission are included, and these multiple time units can be used by multiple terminal devices, then M2 The idle state of some corresponding unlicensed frequency band resources can be evaluated separately by multiple terminal devices. For example, each terminal device only evaluates the time unit for uplink data transmission that is scheduled or used by itself (that is, through the second CCA to re-evaluate). Determine the idle state of the license-exempt frequency band resource); if multiple time units for uplink data transmission are continuously used by a terminal device, the terminal device can The frequency band resources are evaluated only once by CCA, or can be evaluated multiple times, without any specific limitation.

It should be noted that, in this embodiment of the present application, the terminal device corresponding to the time unit refers to a terminal device that uses the time-frequency resources included in the time unit to perform data transmission, and the data transmission here includes control data transmission and/or service Data transmission, not specifically limited.

In addition, in some embodiments of the present application, considering some special scenarios, for example, the access network device uses all the time range (eg MCOT) of the available license-exempt frequency band resources for downlink data transmission, then the access network device In the time range of the available license-exempt frequency band resources (eg MCOT), the idle state of the license-exempt frequency band resources may not be re-determined; for another example, the access network equipment will use the time range of the available license-exempt frequency band resources (eg, MCOT). MCOT) is all used for uplink data transmission, then the scheduled terminal equipment may not re-determine the idle state of the license-exempt frequency band resource within the time range of the available license-exempt frequency band resource (eg MCOT).

Specifically, in some embodiments of the present application, since the first CCA may specifically be a CCA mechanism including random fallback, the second CCA may specifically be a CCA mechanism that does not include random fallback;

Alternatively, in still other embodiments of the present application, both the first CCA and the second CCA may be a CCA mechanism including random backoff, and the random backoff window length corresponding to the first CCA is longer than that corresponding to the second CCA Random fallback window length;

Alternatively, in still other embodiments of the present application, the first CCA is a CCA mechanism that does not include random backoff, and at this time, the second CCA may be considered as not performing CCA.

It can be seen that the time range of the available license-exempt frequency band resources (such as MCOT) and the time range of the usable license-exempt frequency band resources (such as MCOT) are notified to the terminal device through the above method. The data transmission direction corresponding to each time unit, The same beneficial effects as those achieved by the foregoing embodiments of the present application can be achieved, that is, the dependence on the CRS can be eliminated, and the overhead of the control channel can be effectively saved; and the terminal equipment can be informed of the LBT that implements the one shot listening mechanism. The time zone, and the time zone in which the CSI averaging measurement can be performed can be known to the terminal device.

For example, taking the time unit as the slot as an example, for a terminal device capable of performing one shot CSI measurement (that is, CSI measurement can be performed based on one slot without the need to use multiple slots for DL to perform measurement averaging), when detecting After the slot is used for DL, the update of the downlink measurement result can be performed; for terminal equipment that is unable to perform one shot CSI measurement, the downlink included in the time range (such as MCOT) of the available license-exempt frequency band resources can also be obtained. The data transmission time period, and then the area in which the CSI average measurement can be obtained is obtained, and the average measurement of the CSI is completed.

In order to more clearly illustrate the technical solution of instructing the access network device through the control information to use the time range of the unlicensed frequency band and using the first information to indicate the transmission direction of the time unit in the time range described in the above embodiments of the present application, the following is combined with FIG. 11 illustrates the application of the technical solutions provided by the foregoing embodiments of the present application in specific scenarios.

Still based on the possible form of the frame structure on the unlicensed frequency band as shown in Fig. 4, Fig. 11 shows an example of application of some embodiments of the present application to indicate the time range on the unlicensed frequency band through control information.

As shown in Figure 11, in this application example, in the control region of the first complete downlink slot after the start of downlink data transmission (including downlink time units indicating a mini-slot or OFDM symbol), there is a useful Control information indicating the length of time (such as MCOT) of the available license-exempt frequency band resources; at the same time, in order to increase the robustness, the control information on the control region of the second complete downlink slot also indicates the available license-free frequency bands. Length of time for licensed band resources (eg MCOT).

It should be noted that the MCOT indicated by the control information may include the time unit where the control information is located, or may not include it, which is not specifically limited.

It can be seen that in the example shown in FIG. 11 , the terminal device will be able to determine the length of time to use the license-exempt frequency band resources after detecting the control information in the control area of the first complete downlink slot (for example, MCOT), and then by blindly detecting the presence or absence of reference signals or detecting the downlink control channel, determine the data transmission direction corresponding to each slot in the time length of the license-exempt frequency band resources used (such as MCOT), so as to achieve In the absence of CRS, the purpose of the uplink and downlink data transmission time periods on the license-exempt frequency band is determined.

Based on the same inventive concept, the present application also provides a processing device for data transmission in an unlicensed frequency band. The device can be specifically implemented by hardware, software or a combination of software and hardware. The access network device 101 in the communication system 100 shown in FIG. 1 .

FIG. 12 shows a schematic structural diagram of a processing apparatus for data transmission in a license-exempt frequency band provided by some embodiments of the present application. As shown in Figure 12, the device includes:

A determination module 1201, configured to determine the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used;

The sending module 1202 is configured to send common control information to the terminal device, where the common control information is used to indicate the downlink data transmission time period and/or the uplink data transmission time period.

In some embodiments of the present application, the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or the uplink data transmission time period, The second indication information is used to indicate a data transmission period type corresponding to the first indication information, and the data transmission period type includes a downlink data transmission period type and an uplink data transmission period type.

In some embodiments of the present application, the common control information includes third indication information, where the third indication information is used to indicate the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period Downlink data transmission time period; wherein, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time of the first time unit The length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position;

The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. For at least one of the second time units, M and K are integers not less than 1.

In some embodiments of the present application, the common control information further includes fourth indication information, where the fourth indication information is used to indicate the uplink data transmission time period.

In some embodiments of the present application, the fourth indication information is further used to indicate the type of downlink data transmission time period corresponding to the third information; or,

The common control information also includes fifth indication information, where the fifth indication information is used to indicate the downlink data transmission time period type corresponding to the third information;

The downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type.

In some embodiments of the present application, the common control information is carried in the C-PDCCH.

In some embodiments of the present application, the downlink data transmission time period includes N third time units for downlink data transmission, and the third time units include at least two fourth time units for downlink data transmission , the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The common control information is located in a control area included in at least one of the N third time units.

In some embodiments of the present application, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and M and K are integers not less than 1;

The common control information is used to indicate the downlink data transmission time period, including:

The common control information is used to indicate the downlink data transmission time period corresponding to at least one of the first time units in the M first time units;

The sending module 1202 is further configured to: send terminal device specific information to the terminal device, where the terminal device specific indication information is used to indicate that at least one of the K second time units corresponds to the second time unit. downlink data transmission time period.

In some embodiments of the present application, the uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the length of the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1;

The common control information is used to indicate the uplink data transmission time period, including:

The common control information is used to indicate the uplink data transmission time period corresponding to the L first time units;

The sending module 1202 is further configured to: the access network device sends terminal device specific information to the terminal device, where the terminal device specific indication information is used to indicate that at least one of the P second time units is used The uplink data transmission time period corresponding to the second time unit.

Specifically, since the apparatus provided by the above embodiments of the present application is similar to the problem-solving principle of the access network equipment in the process of the method embodiment shown in FIG. 5 above, the specific implementation of the apparatus provided by the above embodiments of the present application can be the same as Reference is made to the implementation of the method on the access network device side in the flow of the method embodiment shown in FIG. 5 above in this application, and repeated descriptions will not be repeated here.

Based on the same inventive concept, the present application also provides a processing device for data transmission in a license-exempt frequency band. The device can be specifically implemented by hardware, software or a combination of software and hardware, and the device can be deployed on the side of the terminal device, such as FIG. 1 Terminal device 102 in communication system 100 is shown.

FIG. 13 shows a schematic structural diagram of a processing apparatus for data transmission in a license-exempt frequency band provided by some embodiments of the present application. As shown in Figure 13, the device includes:

A receiving module 1301, configured to receive public control information sent by an access network device;

The determining module 1302 is configured to determine, according to the public control information, the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources.

In some embodiments of the present application, the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or the uplink data transmission time period, The second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes a downlink data transmission period type and an uplink data transmission period type;

The determining module 1302 is specifically used for:

According to the second indication information, if it is determined that the first indication information corresponds to the downlink data transmission time period, the terminal device determines the downlink data transmission time period according to the first indication information;

According to the second indication information, if it is determined that the first indication information corresponds to the uplink data transmission time period, the terminal device determines the uplink data transmission time period according to the first indication information.

In some embodiments of the present application, the common control information includes third indication information, where the third indication information is used to indicate the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period Downlink data transmission time period; wherein, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time of the first time unit The length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position;

The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. At least one of the second time units, M is an integer not less than 1;

The determining module 1302 is specifically used for:

According to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period is determined.

In some embodiments of the present application, the common control information further includes fourth indication information, where the fourth indication information is used to indicate the uplink data transmission time period;

The determining module 1302 is specifically used for:

The uplink data transmission time period is determined according to the fourth indication information.

In some embodiments of the present application, the fourth indication information is further used to indicate a downlink data transmission period type corresponding to the third information, where the downlink data transmission period type includes the first downlink data transmission a time period type and the second downlink data transmission time period type;

The determining module 1302 is specifically used for:

According to the fourth indication information, if it is determined that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time according to the third indication information part;

According to the fourth indication information, if it is determined that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data transmission time period according to the third indication information;

or,

The common control information also includes fifth indication information, where the fifth indication information is used to indicate the downlink data transmission time period type corresponding to the third information;

The determining module 1302 is specifically used for:

According to the fifth indication information, if it is determined that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time according to the third indication information part;

According to the fifth indication information, if it is determined that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data transmission time period according to the third indication information.

In some embodiments of the present application, the common control information is carried in the C-PDCCH.

In some embodiments of the present application, the downlink data transmission time period includes N third time units for downlink data transmission, and the third time units include at least two fourth time units for downlink data transmission , the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The common control information is located in a control area included in at least one of the N third time units.

In some embodiments of the present application, the downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and M is an integer not less than 1;

The determining module 1302 is specifically used for:

According to the common control information, determine the downlink data transmission time period corresponding to at least one of the first time units in the M first time units in the downlink data transmission time period;

The receiving module 1301 is also used for:

receiving terminal device specific information sent by the access network device;

The determining module 1302 is further configured to:

The downlink data transmission time period corresponding to at least one of the second time units in the K second time units in the downlink data transmission time period is determined according to the specific indication information of the terminal device.

In some embodiments of the present application, the uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the length of the first time unit is The time length is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1;

The determining module 1302 is specifically used for:

According to the common control information, determine the uplink data transmission time period corresponding to the L first time units in the uplink data transmission time period;

The receiving module 1301 is also used for:

receiving terminal device specific information sent by the access network device;

The determining module 1302 is further configured to:

The uplink data transmission time period corresponding to at least one of the second time units in the P second time units in the uplink data transmission time period is determined according to the specific indication information of the terminal device.

Specifically, since the apparatus provided by the above embodiments of the present application is similar to the principle of problem solving by the terminal device in the process of the method embodiment shown in FIG. 5 above, the specific implementation of the apparatus provided by the above embodiments of the present application may be the same as the The implementation of the method on the terminal device side in the foregoing method embodiment process shown in FIG. 5 refers to each other, and repeated descriptions will not be repeated.

Based on the same inventive concept, the present application also provides a processing device for data transmission in a license-exempt frequency band, which can be implemented by hardware, software or a combination of software and hardware. The access network device 101 in the communication system 100 shown in FIG. 1 .

FIG. 14 shows a schematic structural diagram of a processing apparatus for data transmission in a license-exempt frequency band provided by some embodiments of the present application. As shown in Figure 14, the device includes:

A determination module 1401, configured to determine a time range in which license-exempt frequency band resources can be used, and the time range includes a time unit for downlink data transmission and/or a time unit for uplink data transmission;

A sending module 1402, configured to send control information to a terminal device, where the control information is used to indicate the time range; and, to send first information to the terminal device, where the first information is used to indicate that within the time range The data transmission direction corresponding to the time unit of , the data transmission direction includes the downlink data transmission direction and the uplink data transmission direction.

In some embodiments of the present application, the time range is determined by the access network device according to the first CCA result;

When the data transmission direction corresponding to the time unit within the time range is changed from the uplink data transmission direction to the downlink data transmission direction, the idle state of the unlicensed frequency band channel is re-determined by the access network device according to the second CCA result , or directly determined by the access network device to be in an idle state; and/or,

The idle state of the unlicensed frequency band channel corresponding to the time unit for uplink data transmission included in the time range is re-determined by the terminal device corresponding to the time unit according to the second CCA result, or directly by the terminal device corresponding to the time unit. Determined to be idle;

Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA.

In some embodiments of the present application, the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or,

The first CCA and the second CCA are both CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA.

In some embodiments of the present application, the control information is carried in the C-PDCCH.

In some embodiments of the present application, the time unit for downlink data transmission includes N third time units within the time range, the third time units include at least two fourth time units, and the The time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The control information is located in a control area included in at least one of the N third time units.

Specifically, since the apparatus provided by the above-mentioned embodiments of the present application is similar to the problem-solving principle of the access network equipment in the process of the method embodiment shown in FIG. 9 above, the specific implementation of the apparatus provided by the above-mentioned embodiments of the present application can be the same as The implementation of the method on the access network device side in the flow of the method embodiment shown in FIG. 9 above in the present application refers to each other, and repeated descriptions will not be repeated.

Based on the same inventive concept, the present application also provides a processing device for data transmission in a license-exempt frequency band. The device can be specifically implemented by hardware, software or a combination of software and hardware, and the device can be deployed on the side of the terminal device, such as FIG. 1 Terminal device 102 in communication system 100 is shown.

FIG. 15 shows a schematic structural diagram of a processing apparatus for data transmission in a license-exempt frequency band provided by some embodiments of the present application. As shown in Figure 15, the device includes:

A receiving module 1501, configured to receive control information sent by the access network device; and, receive first information sent by the access network device

A determining module 1502, configured to determine, according to the control information, a time range in which the access network device can use the license-exempt frequency band resources; the time range includes a time unit for downlink data transmission and/or a time range for uplink data a time unit for transmission; and, according to the first information, determining a data transmission direction corresponding to the time unit within the time range, where the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction.

In some embodiments of the present application, the time range is determined by the access network device according to the first CCA result;

When the terminal device uses the time unit for uplink data transmission included in the time range, the idle state of the unlicensed frequency band channel corresponding to the time unit is re-determined by the terminal device according to the second CCA result, or by The terminal device is directly determined to be in an idle state;

Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA.

In some embodiments of the present application, the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or,

The first CCA and the second CCA are both CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA.

In some embodiments of the present application, the control information is carried in the C-PDCCH.

In some embodiments of the present application, the time unit for downlink data transmission includes N third time units within the time range, the third time units include at least two fourth time units, and the The time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1;

The control information is located in a control area included in at least one of the N third time units.

Specifically, since the apparatus provided by the above embodiments of the present application is similar to the principle of problem solving by the terminal device in the process of the method embodiment shown in FIG. 9 above, the specific implementation of the apparatus provided by the above embodiments of the present application can be similar to The implementation of the method on the terminal device side in the foregoing method embodiment process shown in FIG. 9 refers to each other, and repeated descriptions will not be repeated.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

Based on the same inventive concept, the present application also provides an access network device. Fig. 16 shows a possible schematic structural diagram of the access network device involved in the above embodiment of the present application. The access network device may be the access network device 101 shown in FIG. 1 .

As shown in FIG. 16 , the access network device includes a transceiver 1601 and a controller/processor 1602 . The transceiver 1601 may be used to support data transmission and reception between the access network device and the terminal device in the above-mentioned embodiment, and support radio communication between the terminal device and other terminal devices. The controller/processor 1602 may be used to perform various functions for communicating with end devices or other network devices. The access network device may also include a memory 1603, which may be used to store program codes and data of the access network device.

The controller/processor 1602 may be specifically configured to execute the processing process performed by the access network device in FIG. 5 above in this application. On the downlink, signaling messages and traffic data are processed by the controller/processor 1602 and mediated by the transceiver 1601 to generate downlink signals, which are transmitted to end devices via the antenna; on the uplink, from The uplink signal of the terminal device is received by the antenna, demodulated by the transceiver 1601, and further processed by the controller/processor 1602 to recover the service data and signaling messages sent by the terminal device. For the specific processing process, reference may be made to the relevant description in the flow of the method embodiment shown in FIG. 5 earlier in this application, and details are not repeated here in this application.

The specific connection medium between the transceiver 1601, the controller/processor 1602, and the memory 1603 is not limited in the embodiments of the present application. In this embodiment of the present application, the transceiver 1601, the controller/processor 1602, and the memory 1603 are connected through a bus in FIG. 16. The bus is represented by a thick line in FIG. 16, and the connection between other components is only for illustration. Sexual descriptions are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in Figure 16, but it does not mean that there is only one bus or one type of bus.

It should be understood that FIG. 16 is only a simplified structural example of an access network device. In practical applications, an access network device may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all access network devices that can implement the technical solutions provided by the embodiments of the present application All are within the scope of protection of this application.

An embodiment of the present invention further provides a readable storage medium for storing software instructions to be executed for executing the above-mentioned controller/processor 1602, which includes a program for executing the above-mentioned controller/processor 1602 to be executed .

Based on the same inventive concept, the present application also provides a terminal device. FIG. 17 shows a possible schematic structural diagram of the terminal device involved in the above-mentioned embodiment of the present application. The terminal device may be the terminal device 102 shown in FIG. 1 .

As shown in FIG. 17 , the terminal device includes a transceiver 1701, a controller/processor 1702, and may also include a memory 1703 and a modem processor 1704.

Specifically, the modem processor 1704 may include an encoder, a modulator, a demodulator, and a decoder, or modules for implementing the functions of an encoder, a modulator, a demodulator, and a decoder. Among other things, the encoder can receive and process the signaling messages and traffic data to be sent on the uplink (eg, format, encode, and interleave), and the modulator can further process (eg, symbol mapping and modulation) encoded signaling messages and traffic data and provide output samples. , the transceiver 1701 conditions (eg, analog-converts, filters, amplifies, and up-converts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the access network described in the foregoing embodiments of the present application equipment. On the downlink, the antenna receives the downlink signal transmitted by the access network device in the above embodiments of the present application. The transceiver 1701 conditions (e.g., filters, amplifies, downconverts, digitizes, etc.) the signal received from the antenna and provides input samples. A demodulator may process (eg, demodulate) the input samples and provide symbol estimates. A decoder may process (eg, de-interleave and decode) the symbol estimates and provide decoded signaling messages and data for transmission to the terminal device.

The controller/processor 1702 can be used to control and manage the actions of the terminal device, and specifically can be used to execute the processing process performed by the terminal device in FIG. 5 above in this application. For the specific processing process, reference may be made to the relevant description in the flow of the method embodiment shown in FIG. 5 earlier in this application, which will not be repeated in this application. The memory 1703 block is used to store program codes and data of the terminal device.

The specific connection medium between the transceiver 1701, the controller/processor 1702, the memory 1703, and the modem processor 1704 is not limited in this embodiment of the present application. In the embodiment of the present application, the transceiver 1701, the controller/processor 1702, the memory 1703, and the modem processor 1704 are connected through a bus in FIG. 17. The bus is represented by a thick line in FIG. 17, and the other components are connected by a bus. The connection method is only for schematic illustration, and is not intended to be limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in Figure 17, but it does not mean that there is only one bus or one type of bus.

It should be understood that FIG. 17 is only a simplified structural example of a terminal device. In practical applications, a terminal device may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all terminal devices that can implement the technical solutions provided by the embodiments of this application are included in this application. within the scope of protection.

Embodiments of the present invention further provide a readable storage medium for storing software instructions to be executed for executing the above-mentioned controller/processor 1702, which includes a program for executing the above-mentioned controller/processor 1702 to be executed .

Based on the same inventive concept, the present application also provides an access network device. Fig. 18 shows a possible schematic structural diagram of the access network device involved in the above-mentioned embodiment of the present application. The access network device may be the access network device 101 shown in FIG. 1 .

As shown in FIG. 18 , the access network device includes a transceiver 1801 and a controller/processor 1802 . The transceiver 1801 may be used to support data transmission and reception between the access network device and the terminal device in the above embodiment, and support radio communication between the terminal device and other terminal devices. The controller/processor 1802 may be used to perform various functions for communicating with end devices or other network devices. The access network device may further include a memory 1803, which may be used to store program codes and data of the access network device.

The controller/processor 1802 may be specifically configured to perform the processing performed by the access network device in FIG. 9 above in this application. On the downlink, signaling messages and traffic data are processed by the controller/processor 1802 and mediated by the transceiver 1801 to generate downlink signals, which are transmitted to the terminal device via the antenna; on the uplink, from The uplink signal of the terminal device is received by the antenna, demodulated by the transceiver 1801, and further processed by the controller/processor 1802 to recover the service data and signaling messages sent by the terminal device. For the specific processing process, reference may be made to the relevant description in the flow of the method embodiment shown in FIG. 9 earlier in this application, which will not be repeated in this application.

The specific connection medium between the transceiver 1801, the controller/processor 1802, and the memory 1803 is not limited in the embodiments of the present application. In this embodiment of the present application, the transceiver 1801, the controller/processor 1802, and the memory 1803 are connected through a bus in FIG. 18. The bus is represented by a thick line in FIG. 18, and the connection between other components is only for illustration. Sexual descriptions are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 18, but it does not mean that there is only one bus or one type of bus.

It should be understood that FIG. 18 is only a simplified structural example of an access network device. In practical applications, an access network device may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all access network devices that can implement the technical solutions provided by the embodiments of the present application All are within the scope of protection of this application.

An embodiment of the present invention further provides a readable storage medium for storing software instructions to be executed for executing the above-mentioned controller/processor 1802, which includes a program for executing the above-mentioned controller/processor 1802 to be executed .

FIG. 19 shows a schematic structural diagram of a possible terminal device involved in the foregoing embodiment of the present application. The terminal device may be the terminal device 102 shown in Figure 1 .

As shown in FIG. 19 , the terminal device includes a transceiver 1901, a controller/processor 1902, and may also include a memory 1903 and a modem processor 1904.

Specifically, the modem processor 1904 may include an encoder, a modulator, a demodulator, and a decoder, or modules for implementing the functions of an encoder, a modulator, a demodulator, and a decoder. Among other things, the encoder can receive and process the signaling messages and traffic data to be sent on the uplink (eg, format, encode, and interleave), and the modulator can further process (eg, symbol mapping and modulation) encoded signaling messages and traffic data and provide output samples. , the transceiver 1901 conditions (eg, analog-converts, filters, amplifies, and up-converts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to the access network described in the foregoing embodiments of the present application equipment. On the downlink, the antenna receives the downlink signal transmitted by the access network device in the above embodiments of the present application. The transceiver 1901 conditions (e.g., filters, amplifies, downconverts, and digitizes, etc.) the signal received from the antenna and provides input samples. A demodulator may process (eg, demodulate) the input samples and provide symbol estimates. A decoder may process (eg, de-interleave and decode) the symbol estimates and provide decoded signaling messages and data for transmission to the terminal device.

The controller/processor 1902 can be used to control and manage the actions of the terminal device, and specifically can be used to execute the processing process performed by the terminal device in FIG. 9 above in this application. For the specific processing process, reference may be made to the relevant description in the flow of the method embodiment shown in FIG. 9 earlier in this application, which will not be repeated in this application. The memory 1903 block is used to store program codes and data of the terminal device.

The specific connection medium between the transceiver 1901, the controller/processor 1902, the memory 1903, and the modem processor 1904 is not limited in the embodiments of the present application. In the embodiment of the present application, the transceiver 1901, the controller/processor 1902, the memory 1903, and the modem processor 1904 are connected by a bus in FIG. 19. The bus is represented by a thick line in FIG. 19, and the other components are connected by a bus. The connection method is only for schematic illustration, and is not intended to be limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in Figure 19, but it does not mean that there is only one bus or one type of bus.

It should be understood that FIG. 19 is only a simplified structural example of the terminal device. In practical applications, a terminal device may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all terminal devices that can implement the technical solutions provided by the embodiments of this application are included in this application. within the scope of protection.

An embodiment of the present invention further provides a readable storage medium for storing software instructions to be executed for executing the above-mentioned controller/processor 1902, which includes a program for executing the above-mentioned controller/processor 1902 to be executed. .

The controller/processor used to execute the above-mentioned access network equipment and terminal equipment of the present application may be a central processing unit (CPU), a general-purpose processor, a data signal processor (DSP), an specialized integrated circuit (ASIC), a field programmable A gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

As will be appreciated by one skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (56)

1. A method for processing data transmission on an unlicensed frequency band, wherein the method comprises: The access network device determines the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used; The access network device sends common control information to the terminal device, where the common control information is used to indicate the downlink data transmission time period and/or the uplink data transmission time period. 2. The method according to claim 1, wherein the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or the the uplink data transmission period, the second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes the downlink data transmission period type and the uplink data transmission time segment type. 3 . The method according to claim 1 , wherein the common control information includes third indication information, and the third indication information is used to indicate the first downlink included in the downlink data transmission time period. 4 . the data transmission time period or the second downlink data transmission time period; The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time length of the first time unit is not less than the first time unit. The time length of two time units, and the first time unit and the second time unit do not overlap in time position; The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. For at least one of the second time units, M and K are integers not less than 1. 4. The method according to claim 3, wherein the common control information further comprises fourth indication information, wherein the fourth indication information is used to indicate the uplink data transmission time period. 5. The method according to claim 4, wherein the fourth indication information is further used to indicate a downlink data transmission time period type corresponding to the third information; or, The common control information further includes fifth indication information, where the fifth indication information is used to indicate a downlink data transmission time period type corresponding to the third information; The downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type. 6. The method according to any one of claims 1-5, wherein the common control information is carried in a common physical downlink control channel C-PDCCH. 7. The method of any one of claims 1-6, wherein The downlink data transmission time period includes N third time units for downlink data transmission, the third time units include at least two fourth time units for downlink data transmission, and the fourth time unit is The time length is less than the time length of the third time unit, and the N is an integer not less than 1; The common control information is located in a control area included in at least one of the N third time units. 8. The method of any one of claims 1-7, wherein The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the time length of the first time unit is not less than the second time unit. The time length of the time unit, and the first time unit and the second time unit do not overlap in time position, and M and K are integers not less than 1; The common control information is used to indicate the downlink data transmission time period, including: The common control information is used to indicate a downlink data transmission time period corresponding to at least one of the first time units in the M first time units; The method also includes: The access network device sends terminal device specific information to the terminal device, where the terminal device specific indication information is used to indicate downlink data transmission corresponding to at least one of the second time units in the K second time units period. 9. The method of any one of claims 1-8, wherein The uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the time length of the first time unit is not less than the second time unit. The time length of the time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1; The common control information is used to indicate the uplink data transmission time period, including: The common control information is used to indicate the uplink data transmission time period corresponding to the L first time units; The method also includes: The access network device sends terminal device-specific information to the terminal device, where the terminal device-specific indication information is used to indicate uplink data corresponding to at least one of the second time units in the P second time units Transmission time period. 10. A method for processing data transmission in an unlicensed frequency band, wherein the method comprises: The terminal device receives the public control information sent by the access network device; The terminal device determines, according to the public control information, a downlink data transmission time period and/or an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources. 11. The method of claim 10, wherein the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or all the uplink data transmission period, the second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes the downlink data transmission period type and the uplink data transmission time segment type; The terminal device determines, according to the public control information, a downlink data transmission time period and/or an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including: If, according to the second indication information, the terminal device determines that the first indication information corresponds to the downlink data transmission time period, the terminal device determines the downlink data transmission time according to the first indication information part; If, according to the second indication information, the terminal device determines that the first indication information corresponds to the uplink data transmission time period, the terminal device determines the uplink data transmission time according to the first indication information part. 12 . The method according to claim 10 , wherein the common control information includes third indication information, and the third indication information is used to indicate the first downlink data included in the downlink data transmission time period. 13 . the data transmission time period or the second downlink data transmission time period; The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time length of the first time unit is not less than the first time unit. The time length of two time units, and the first time unit and the second time unit do not overlap in time position; The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. At least one of the second time units, M is an integer not less than 1; The terminal device determines, according to the public control information, a downlink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including: The terminal device determines, according to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period. 13. The method according to claim 12, wherein the common control information further comprises fourth indication information, wherein the fourth indication information is used to indicate the uplink data transmission time period; The terminal device determines, according to the public control information, an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including: The terminal device determines the uplink data transmission time period according to the fourth indication information. 14. The method according to claim 13, wherein the fourth indication information is further used to indicate a downlink data transmission period type corresponding to the third information, wherein the downlink data transmission period type includes all the first downlink data transmission period type and the second downlink data transmission period type; The terminal device determines, according to the third indication information, the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period, including: If, according to the fourth indication information, the terminal device determines that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time period according to the third indication information. Line data transmission time period; If, according to the fourth indication information, the terminal device determines that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data according to the third indication information transmission time period; or, The common control information further includes fifth indication information, where the fifth indication information is used to indicate a downlink data transmission time period type corresponding to the third information; The terminal device determines, according to the third indication information, the first downlink data transmission time period or the second downlink data transmission time period included in the downlink data transmission time period, including: If, according to the fifth indication information, the terminal device determines that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time period according to the third indication information. Line data transmission time period; If, according to the fifth indication information, the terminal device determines that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data according to the third indication information Transmission time period. 15. The method according to any one of claims 10-14, wherein the common control information is carried in a common physical downlink control channel C-PDCCH. 16. The method according to any one of claims 10-15, wherein the downlink data transmission time period includes N third time units for downlink data transmission, wherein the third time unit includes At least two fourth time units for downlink data transmission, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The common control information is located in a control area included in at least one of the N third time units. 17. The method according to any one of claims 10-16, wherein the downlink data transmission time period comprises M first time units for downlink data transmission and K first time units for downlink data transmission. A second time unit, wherein the time length of the first time unit is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, and M is an integer not less than 1; The terminal device determines, according to the public control information, a downlink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including: The terminal device determines, according to the common control information, a downlink data transmission time period corresponding to at least one of the M first time units in the downlink data transmission time period; The method also includes: receiving, by the terminal device, terminal device specific information sent by the access network device; The terminal device determines, according to the specific indication information of the terminal device, a downlink data transmission time period corresponding to at least one of the K second time units in the downlink data transmission time period. 18. The method according to any one of claims 10-17, wherein the uplink data transmission time period comprises L first time units for uplink data transmission and P first time units for uplink data transmission. a second time unit, wherein the time length of the first time unit is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, L, P is an integer not less than 1; The terminal device determines, according to the public control information, an uplink data transmission time period within a time range in which the access network device can use the license-exempt frequency band resources, including: The terminal device determines, according to the common control information, uplink data transmission time periods corresponding to the L first time units in the uplink data transmission time periods; The method also includes: receiving, by the terminal device, terminal device specific information sent by the access network device; The terminal device determines, according to the specific indication information of the terminal device, an uplink data transmission time period corresponding to at least one of the second time units of the P second time units in the uplink data transmission time period. 19. A method for processing data transmission in a license-exempt frequency band, wherein the method comprises: The access network device determines a time range in which the license-exempt frequency band resources can be used, and the time range includes a time unit for downlink data transmission and/or a time unit for uplink data transmission; The access network device sends control information to the terminal device, where the control information is used to indicate the time range; The access network device sends first information to the terminal device, where the first information is used to indicate a data transmission direction corresponding to a time unit within the time range, and the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction Data transfer direction. 20. The method according to claim 19, wherein the time range is determined by the access network device according to a first idle channel evaluation CCA result; The method also includes: When the data transmission direction corresponding to the time unit within the time range is changed from the uplink data transmission direction to the downlink data transmission direction, the idle state of the unlicensed frequency band channel is re-determined by the access network device according to the second CCA result , or directly determined by the access network device to be in an idle state; and / or, The idle state of the unlicensed frequency band channel corresponding to the time unit for uplink data transmission included in the time range is re-determined by the terminal device corresponding to the time unit according to the second CCA result, or directly by the terminal device corresponding to the time unit. Determined to be idle; Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA. 21. The method of claim 20, wherein the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or, Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA. 22. The method according to any one of claims 19-21, wherein the control information is carried in a common physical downlink control channel C-PDCCH. 23. The method according to any one of claims 19-22, wherein the time unit for downlink data transmission comprises N third time units within the time range, and the third time unit The unit includes at least two fourth time units, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The control information is located in a control area included in at least one of the N third time units. 24. A method for processing data transmission on an unlicensed frequency band, wherein the method comprises: The terminal device receives the control information sent by the access network device, and determines, according to the control information, a time range in which the access network device can use the license-exempt frequency band resources; the time range includes a time unit for downlink data transmission and/or time unit for uplink data transmission; The terminal device receives the first information sent by the access network device, and determines, according to the first information, a data transmission direction corresponding to a time unit within the time range, where the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction Data transfer direction. 25. The method according to claim 24, wherein the time range is determined by the access network device according to a first idle channel evaluation CCA result; The method also includes: When the terminal device uses the time unit for uplink data transmission included in the time range, the idle state of the unlicensed frequency band channel corresponding to the time unit is re-determined by the terminal device according to the second CCA result, or by The terminal device is directly determined to be in an idle state; Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA. 26. The method of claim 25, wherein the first CCA is a CCA mechanism that includes random backoff, and the second CCA is a CCA mechanism that does not include random backoff; or, Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA. 27. The method according to any one of claims 24-26, wherein the control information is carried in a common physical downlink control channel C-PDCCH. 28. The method according to any one of claims 24-27, wherein the time unit for downlink data transmission comprises N third time units within the time range, and the third time unit The unit includes at least two fourth time units, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The control information is located in a control area included in at least one of the N third time units. 29. An access network device, comprising: a processor and a transceiver; wherein, the processor, configured to determine the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the license-exempt frequency band resources can be used; and, Common control information is sent to the terminal device through the transceiver, where the common control information is used to indicate the downlink data transmission time period and/or the uplink data transmission time period. 30. The access network device according to claim 29, wherein the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time segment or the uplink data transmission period, the second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes the downlink data transmission period type and the uplink data transmission period type. Data transfer period type. 31 . The access network device according to claim 29 , wherein the common control information includes third indication information, and the third indication information is used to indicate the third indication information included in the downlink data transmission time period. 31 . Downlink data transmission time period or second downlink data transmission time period; The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time length of the first time unit is not less than the first time unit. The time length of two time units, and the first time unit and the second time unit do not overlap in time position; The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. For at least one of the second time units, M and K are integers not less than 1. 32. The access network device according to claim 31, wherein the common control information further comprises fourth indication information, wherein the fourth indication information is used to indicate the uplink data transmission time period. 33. The access network device according to claim 32, wherein the fourth indication information is further used to indicate a downlink data transmission time period type corresponding to the third information; or, The common control information further includes fifth indication information, where the fifth indication information is used to indicate a downlink data transmission time period type corresponding to the third information; The downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type. 34. The access network device according to any one of claims 29-33, wherein the common control information is carried in a common physical downlink control channel C-PDCCH. 35. The access network device according to any one of claims 29-34, wherein, The downlink data transmission time period includes N third time units for downlink data transmission, the third time units include at least two fourth time units for downlink data transmission, and the fourth time unit is The time length is less than the time length of the third time unit, and the N is an integer not less than 1; The common control information is located in a control area included in at least one of the N third time units. 36. The access network device according to any one of claims 29-35, wherein, The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, wherein the time length of the first time unit is not less than the second time unit. The time length of the time unit, and the first time unit and the second time unit do not overlap in time position, and M and K are integers not less than 1; The common control information is used to indicate the downlink data transmission time period, including: The common control information is used to indicate a downlink data transmission time period corresponding to at least one of the first time units in the M first time units; The processor is also used to: Send terminal device specific information to the terminal device through the transceiver, where the terminal device specific indication information is used to indicate the downlink data transmission time corresponding to at least one of the second time units in the K second time units part. 37. The access network device according to any one of claims 29-36, wherein, The uplink data transmission time period includes L first time units for uplink data transmission and P second time units for uplink data transmission, wherein the time length of the first time unit is not less than the second time unit. The time length of the time unit, and the first time unit and the second time unit do not overlap in time position, and L and P are integers not less than 1; The common control information is used to indicate the uplink data transmission time period, including: The common control information is used to indicate the uplink data transmission time period corresponding to the L first time units; The processor is also used to: Send terminal device-specific information to the terminal device through the transceiver, where the terminal device-specific indication information is used to indicate the use of uplink data transmission corresponding to at least one of the P second time units corresponding to the second time unit period. 38. A terminal device, comprising: a processor and a transceiver; wherein, the processor, configured to receive the public control information sent by the access network device through the transceiver; and, According to the common control information, determine the downlink data transmission time period and/or the uplink data transmission time period within the time range in which the access network device can use the license-exempt frequency band resources. 39. The terminal device according to claim 38, wherein the common control information includes first indication information and second indication information, and the first indication information is used to indicate the downlink data transmission time period or For the uplink data transmission period, the second indication information is used to indicate the data transmission period type corresponding to the first indication information, and the data transmission period type includes the downlink data transmission period type and the uplink data transmission period. time period type; The processor is specifically used for: According to the second indication information, if it is determined that the first indication information corresponds to the downlink data transmission time period, the terminal device determines the downlink data transmission time period according to the first indication information; According to the second indication information, if it is determined that the first indication information corresponds to the uplink data transmission time period, the terminal device determines the uplink data transmission time period according to the first indication information. 40. The terminal device according to claim 38, wherein the common control information includes third indication information, and the third indication information is used to indicate the first downlink data included in the downlink data transmission time period. the line data transmission time period or the second downlink data transmission time period; The downlink data transmission time period includes M first time units for downlink data transmission and K second time units for downlink data transmission, and the time length of the first time unit is not less than the first time unit. The time length of two time units, and the first time unit and the second time unit do not overlap in time position; The first downlink data transmission time period includes at least one of the M first time units, and the second downlink data transmission time period includes at least one of the K second time units. At least one of the second time units, M is an integer not less than 1; The processor is specifically used for: According to the third indication information, the first downlink data transmission period or the second downlink data transmission period included in the downlink data transmission period is determined. 41. The terminal device according to claim 40, wherein the common control information further comprises fourth indication information, wherein the fourth indication information is used to indicate the uplink data transmission time period; The processor is specifically used for: The uplink data transmission time period is determined according to the fourth indication information. 42. The terminal device according to claim 41, wherein the fourth indication information is further used to indicate a downlink data transmission period type corresponding to the third information, wherein the downlink data transmission period type includes the first downlink data transmission period type and the second downlink data transmission period type; The processor is specifically used for: According to the fourth indication information, if it is determined that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time according to the third indication information part; According to the fourth indication information, if it is determined that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data transmission time period according to the third indication information; or, The common control information further includes fifth indication information, where the fifth indication information is used to indicate a downlink data transmission time period type corresponding to the third information; The processor is specifically used for: According to the fifth indication information, if it is determined that the third indication information corresponds to the first downlink data transmission time period, the terminal device determines the first downlink data transmission time according to the third indication information part; According to the fifth indication information, if it is determined that the third indication information corresponds to the second downlink data transmission time period, the terminal device determines the second downlink data transmission time period according to the third indication information. 43. The terminal device according to any one of claims 38-42, wherein the common control information is carried in a common physical downlink control channel C-PDCCH. 44. The terminal device according to any one of claims 38 to 43, wherein the downlink data transmission time period includes N third time units for downlink data transmission, and the third time unit is Including at least two fourth time units for downlink data transmission, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The common control information is located in a control area included in at least one of the N third time units. 45. The terminal device according to any one of claims 38-44, wherein the downlink data transmission time period comprises M first time units for downlink data transmission and K first time units for downlink data transmission the second time unit of the is an integer not less than 1; The processor is specifically used for: determining, according to the common control information, a downlink data transmission time period corresponding to at least one of the first time units in the M first time units in the downlink data transmission time period; The processor is also used to: receiving, through the transceiver, terminal device specific information sent by the access network device; A downlink data transmission time period corresponding to at least one of the second time units in the K second time units in the downlink data transmission time period is determined according to the specific indication information of the terminal device. 46. The terminal device according to any one of claims 38-45, wherein the uplink data transmission time period comprises L first time units for uplink data transmission and P first time units for uplink data transmission The second time unit, wherein the time length of the first time unit is not less than the time length of the second time unit, and the first time unit and the second time unit do not overlap in time position, L , P is an integer not less than 1; The processor is specifically used for: According to the common control information, determine the uplink data transmission time period corresponding to the L first time units in the uplink data transmission time period; The processor is also used to: receiving, through the transceiver, terminal device specific information sent by the access network device; Determine the uplink data transmission time period corresponding to at least one of the second time units in the P second time units in the uplink data transmission time period according to the specific indication information of the terminal device. 47. An access network device, comprising: a processor and a transceiver; wherein, the processor, configured to determine a time range in which the license-exempt frequency band resources can be used, the time range including a time unit for downlink data transmission and/or a time unit for uplink data transmission; and, Sending control information to a terminal device through the transceiver, where the control information is used to indicate the time range; and sending first information to the terminal device, where the first information is used to indicate the time range The data transmission direction corresponding to the time unit within the data transmission direction includes a downlink data transmission direction and an uplink data transmission direction. 48. The access network device according to claim 47, wherein the time range is determined by the access network device according to a first idle channel evaluation CCA result; When the data transmission direction corresponding to the time unit within the time range is changed from the uplink data transmission direction to the downlink data transmission direction, the idle state of the unlicensed frequency band channel is re-determined by the processor according to the second CCA result, or directly determined by the processor to be in an idle state; and / or, The idle state of the unlicensed frequency band channel corresponding to the time unit for uplink data transmission included in the time range is re-determined by the terminal device corresponding to the time unit according to the second CCA result, or directly by the terminal device corresponding to the time unit. Determined to be idle; Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA. 49. The access network device according to claim 48, wherein the first CCA is a CCA mechanism including random backoff, and the second CCA is a CCA mechanism not including random backoff; or, Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA. 50. The access network device according to any one of claims 47-49, wherein the control information is carried in a common physical downlink control channel C-PDCCH. 51. The access network device according to any one of claims 47-50, wherein the time unit for downlink data transmission includes N third time units within the time range, and the time unit The third time unit includes at least two fourth time units, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The control information is located in a control area included in at least one of the N third time units. 52. A terminal device, comprising: a processor and a transceiver; wherein, The processor is configured to receive control information sent by the access network device through the transceiver, and determine, according to the control information, a time range in which the access network device can use the license-exempt frequency band resources; the time range including a time unit for downlink data transmission and/or a time unit for uplink data transmission; and, Receive the first information sent by the access network device through the transceiver, and determine the data transmission direction corresponding to the time unit within the time range according to the first information, where the data transmission direction includes the downlink data transmission direction and the Upstream data transmission direction. 53. The terminal device according to claim 52, wherein the time range is determined by the access network device according to a first idle channel evaluation CCA result; When the processor uses the time unit for uplink data transmission included in the time range, the idle state of the unlicensed frequency band channel corresponding to the time unit is re-determined by the processor according to the second CCA result, or by The processor is directly determined to be in an idle state; Wherein, the listening priority of the second CCA is higher than the listening priority of the first CCA. 54. The terminal device according to claim 53, wherein the first CCA is a CCA mechanism including random backoff, and the second CCA is a CCA mechanism not including random backoff; or, Both the first CCA and the second CCA are CCA mechanisms including random backoff, and the random backoff window length corresponding to the first CCA is greater than the random backoff window length corresponding to the second CCA. 55. The terminal device according to any one of claims 52-54, wherein the control information is carried in a common physical downlink control channel C-PDCCH. 56. The terminal device according to any one of claims 52-55, wherein the time unit for downlink data transmission comprises N third time units within the time range, and the third time unit is The time unit includes at least two fourth time units, the time length of the fourth time unit is less than the time length of the third time unit, and the N is an integer not less than 1; The control information is located in a control area included in at least one of the N third time units.