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CN107889114B - Method and equipment for occupying unlicensed spectrum channels - Google Patents

Method and equipment for occupying unlicensed spectrum channels Download PDF

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Publication number
CN107889114B
CN107889114B CN201710313512.7A CN201710313512A CN107889114B CN 107889114 B CN107889114 B CN 107889114B CN 201710313512 A CN201710313512 A CN 201710313512A CN 107889114 B CN107889114 B CN 107889114B
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China
Prior art keywords
cot
channel
control information
terminal device
network side
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CN201710313512.7A
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Chinese (zh)
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CN107889114A (en
Inventor
庞继勇
向铮铮
张佳胤
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2017/099692 priority Critical patent/WO2018059179A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and device for unlicensed spectrum channel occupation, the method includes: the network side equipment generates first control information, wherein the first control information is used for indicating channel occupation parameters in at least one COT; the network side equipment sends first control information to at least one terminal equipment so that the at least one terminal equipment can communicate with the network side equipment in the at least one COT according to the first control information. By adopting the scheme, on the premise of reducing signaling overhead of dynamically informing channel occupation parameters, the terminal equipment can also be enabled to know the channel occupation configuration overall view during the channel occupation period, and then the monitoring of the downlink channel is flexibly adjusted according to the finer granularity channel occupation parameters provided by the first control information, so that the monitoring of the downlink channel is favorably reduced by the terminal equipment, and the power consumption of the terminal equipment is correspondingly reduced.

Description

Method and equipment for occupying unlicensed spectrum channels
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and apparatus for unlicensed spectrum channel occupation.
Background
In a communication system deployed based on unlicensed spectrum, each node judges its busy/idle state according to the magnitude of the received power on the unlicensed spectrum, if the received power is smaller than a certain threshold, then no interference source is considered on the unlicensed spectrum and the unlicensed spectrum is in idle state, then signals can be sent on the unlicensed spectrum, and the mechanism of monitoring before sending is called listen before talk (english: listen Before Talk, english: LBT for short), so as to avoid collision between each node when using unlicensed spectrum resources. Because each node uses/shares radio resources in a contention manner, the transmission start time on the unlicensed spectrum is not fixed, the frequency domain channel width occupied by each transmission also changes with different channel idle evaluation results, meanwhile, the maximum channel occupation duration of one transmission is limited, and the channel occupation duration of each time cannot be dynamically indicated to each node.
Currently, in a wireless fidelity (Wi-Fi) system, a control information including a transmission opportunity (Transmit Opportunity, abbreviated as TXOP) is carried in each packet header, where the TXOP is used to indicate a bandwidth used for transmitting the present packet, a duration of transmitting the present packet, and a remaining duration of the TXOP after the end of the present packet. Although the remaining TXOP duration may be dynamically updated to indicate, the uplink and downlink configurations of subframes in the remaining channel occupation duration cannot be dynamically indicated, and the node still needs to monitor the control information continuously and cannot enter the energy-saving mode.
Because the channel occupation parameters occupied by each channel change, the currently adopted TXOP mechanism cannot dynamically and rapidly inform each node, thereby being unfavorable for the communication among the nodes and being incapable of better adapting to the changed channels/services.
Disclosure of Invention
The invention provides a method and equipment for occupying an unlicensed spectrum channel, which can solve the problem that a notification mechanism of channel occupation parameters cannot adapt to a channel or service with quicker change in the prior art.
In the method for unlicensed spectrum channel occupation provided in the first aspect, the network side device acquires the control right of the channel, and then generates first control information, where the first control information is used to indicate the channel occupation parameter in at least one COT. Wherein the channel occupancy parameter may comprise at least one of the following information elements:
A first COT of the at least one COT, a frequency domain parameter used to transmit signals within the first COT, a time domain cell structure within the first COT, or first transmission trigger information.
Wherein, the first COT of the information element refers to any COT in at least one COT, and if the first COT refers to the last COT, the indicated channel occupation parameter in the first COT is only applicable to data transmission in the first COT; if the first COT does not refer to the last COT, the indicated channel occupation parameter in the first COT may be used only for data transmission in the first COT and may also be used for data transmission in several cobs after the first COT.
The frequency domain parameters used for transmitting signals within the first COT mainly comprise a maximum channel frequency domain bandwidth used for transmitting signals within the first COT and frequency domain subband parameters used within the first COT. By indicating the frequency domain sub-band parameters to the terminal equipment, the terminal equipment can accurately and rapidly acquire the frequency domain parameters, so that uplink transmission and downlink reception are performed, and the uplink/downlink transmission efficiency is improved.
The time domain unit structure within the first COT refers to: the type of time domain cell structure within the first COT and/or the length of the time domain cell structure within the first COT. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can monitor the downlink channel only when the time domain unit is in the downlink, so that the power consumption can be reduced, and the uplink transmission is performed on the uplink time domain part according to the time domain unit structure in the first COT, so that the purpose of optimizing the uplink transmission and downlink receiving mechanism of the terminal device is achieved.
The first transmission trigger information is trigger information capable of triggering one-time COT transmission, so that the terminal equipment can perform uplink transmission in an uplink time domain part after receiving the first transmission trigger information, and the first transmission trigger information is specifically usable for: and in the first COT triggered by the network side equipment, the terminal equipment uses an LBT contention channel with the time length lower than a first threshold value. The first transmission trigger information may be a specific random sequence, such as a synchronization sequence or a preamble sequence.
And then, the network side equipment sends the generated first control information to at least one terminal equipment so that the at least one terminal equipment can communicate with the network side equipment in the at least one COT according to the first control information. Optionally, the network side device may send the first control information from a downlink transmission start time in the first COT. In addition, the first control information can also be sent through a public control signaling or a terminal equipment dedicated control signaling or a downlink control signaling of an authorized channel, so that the purpose of reducing blind detection of the first control information by the terminal equipment can be achieved.
Compared with the existing mechanism, in the embodiment of the invention, the network side equipment sends the first control information for indicating the channel occupation parameter in at least one COT to at least one terminal equipment, so that the signaling overhead for dynamically informing the channel occupation parameter is reduced, the terminal equipment can know the channel occupation configuration overall view during the channel occupation period, and then the monitoring of the downlink channel is flexibly adjusted according to the channel occupation parameter with finer granularity provided by the first control information, thereby being beneficial to the terminal equipment to reduce the monitoring of the downlink channel and correspondingly reducing the power consumption of the terminal equipment.
In order to enable more terminal devices to monitor the first control information and accurately and rapidly locate to a time-frequency position for monitoring the first control information, the first control information can be sent through a public control signaling or a special control signaling of the terminal device or a downlink control signaling of an authorized channel, so that the probability that the terminal device receives the first control information is improved, the terminal device only needs to receive the first control information at a predefined time-frequency position, the operation that the terminal device blindly detects the first control information is reduced, and the power consumption of the terminal device is correspondingly reduced.
In some application scenarios, the network side device obtains the control right of the channel mainly through the following two ways:
A. the control right is obtained by the network side equipment
Before the network side equipment performs downlink transmission, the network side equipment contends for the first channel through LBT, and after the network side equipment successfully contends for the first channel, the network side equipment can perform downlink transmission through the contended first channel, and meanwhile, the first control information is generated and is sent to at least one terminal equipment.
Or when knowing that the terminal equipment has uplink transmission requirements, the network side equipment competes for the first channel through LBT, and after successfully competing for the first channel, the network side equipment can generate the first control information, send the first control information to at least one terminal equipment, and respectively send uplink transmission authorization information for indicating the terminal equipment to perform uplink transmission to each terminal equipment, so that each terminal equipment performs uplink transmission on time-frequency resources indicated by the uplink transmission authorization information.
B. The terminal device transfers the acquired control right to the network device
After the terminal equipment obtains the control right of the first channel through the LBT, the first channel is used for uplink transmission, the uplink transmission of the terminal equipment can carry second transmission triggering information, and the uplink transmission of the terminal equipment can be used as an operation for triggering COT transmission without carrying the second transmission triggering information.
In the method for unlicensed spectrum occupation provided in the second aspect, the terminal device receives first control information sent by the network side device, where the first control information is used to indicate channel occupation parameters in at least one COT. The first control information may include at least one of the following information elements:
a first COT of the at least one COT, a frequency domain parameter used to transmit signals within the first COT, a time domain cell structure within the first COT, or first transmission trigger information.
Wherein, the first COT of the information element refers to any COT in at least one COT, and if the first COT refers to the last COT, the indicated channel occupation parameter in the first COT is only applicable to data transmission in the first COT; if the first COT does not refer to the last COT, the indicated channel occupation parameter in the first COT may be used only for data transmission in the first COT and may also be used for data transmission in several cobs after the first COT.
The frequency domain parameters used for transmitting signals within the first COT mainly comprise a maximum channel frequency domain bandwidth used for transmitting signals within the first COT and frequency domain subband parameters used within the first COT. By indicating the frequency domain sub-band parameters to the terminal equipment, the terminal equipment can accurately and rapidly acquire the frequency domain parameters, so that uplink transmission and downlink reception are performed, and the uplink/downlink transmission efficiency is improved.
The time domain unit structure within the first COT refers to: the type of time domain cell structure within the first COT and/or the length of the time domain cell structure within the first COT. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can monitor the downlink channel only when the time domain unit is in the downlink, so that the power consumption can be reduced, and the uplink transmission is performed on the uplink time domain part according to the time domain unit structure in the first COT, so that the purpose of optimizing the uplink transmission and downlink receiving mechanism of the terminal device is achieved.
The first transmission trigger information is trigger information capable of triggering one-time COT transmission, so that the terminal equipment can perform uplink transmission in an uplink time domain part after receiving the first transmission trigger information, and the first transmission trigger information is specifically usable for: and in the first COT triggered by the network side equipment, the terminal equipment uses an LBT contention channel with the time length lower than a first threshold value. The first transmission trigger information may be a specific random sequence, such as a synchronization sequence or a preamble sequence.
And the terminal equipment communicates with the network side equipment in the at least one COT according to the first control information.
The terminal device may actively contend for the channel in several cases:
1. the control right of the channel can be transferred to the network side equipment after competing for the channel through the LBT competition channel by oneself, then the network side equipment configures the first control information,
2. the terminal device may actively contend for the first channel when the following situations occur, so as to obtain the control right of the first channel, for example, when there is no downlink time domain part in the time domain unit structure used for transmitting signals in the second COT in the at least one COT, or when the downlink time domain part in the time domain unit structure used for transmitting signals in the COT triggered by the network side device (for example, the first COT) cannot be used for the second transmission triggering information, the terminal device may contend for the channel, or when the terminal device cannot complete uplink transmission in the COT triggered by the network side device, the terminal device may contend for the channel through LBT after the end of the COT triggered by the current network side device, and perform uplink transmission after the contention channel is successful, so as to trigger a new COT transmission.
3. The network side equipment informs the terminal equipment of certain channel occupation parameters required by subsequent transmission in advance, so that the terminal equipment can compete for the channel through LBT and carry second transmission triggering information in uplink transmission after channel competition is successful.
In the above three cases 1 to 3, after the terminal device obtains the control right of the channel, the control right of the channel may be transferred to the network side device, for example, the terminal device uses an uplink transmission manner, and carries second transmission trigger information in the uplink transmission, where the second transmission trigger information is used to notify the network side device and/or the other terminal device: and taking the initial transmission time of the terminal equipment for uplink transmission of the first one in each COT in at least one third COT as the uplink trigger time. Therefore, after the network side equipment acquires the control right of the channel, corresponding control information is generated and sent to each terminal equipment. Of course, the terminal device may send the second transmission triggering information to the terminal devices adjacent to the physical location of the terminal device in a similar manner to the discovery signal, trigger the terminal devices to use LBT contention channels with a duration lower than the first threshold, and perform uplink transmission in at least one third COT triggered by the terminal device, and of course, the terminal devices may be triggered to perform uplink transmission without sending the second transmission triggering information.
It should be noted that, the control right of the terminal device actively decompensates the LBT contention channel with the time length higher than the second threshold value needs to be adopted, where the length of the LBT with the time length higher than the second threshold value is related to the random backoff time length when the terminal device listens to the channel, so that by defining the random backoff time length of each terminal device listening to the channel, orderly multi-user simultaneous transmission can be ensured, and thus, the transmission efficiency of multi-user simultaneous transmission is improved.
In other application scenarios, the terminal device may perform uplink transmission in at least one fourth COT after the active contention channel of the other terminal device, in addition to the active contention channel for uplink transmission, which is specifically as follows:
the terminal device receives second control information sent by the network side device, the second control information indicates channel occupation parameters in at least one fourth COT triggered by the other terminal device, and the process of triggering at least one fourth COT transmission by the other terminal device and the process of actively competing for channel control rights by the terminal device are not repeated here.
Then, the terminal device may communicate with the network side device in the at least one fourth COT indicated by the second control information according to the channel occupation parameter in the at least one fourth COT indicated by the second control information.
In addition, the first control information and the second control information are sent through a common control signaling or a dedicated control signaling of the terminal equipment or a downlink control signaling of an authorized channel, so that the purpose of reducing blind detection of the first control information by the terminal equipment can be achieved.
A third aspect of the present invention provides a network-side device having a function of implementing a method corresponding to the unlicensed spectrum channel occupation provided in the first aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above, which may be software and/or hardware.
In one possible design, the network side device includes:
the processing module is used for generating first control information, wherein the first control information is used for indicating channel occupation parameters in at least one COT;
and the receiving and transmitting module is used for transmitting the first control information generated by the processing module to at least one terminal device so that the at least one terminal device can communicate with the network side device in the at least one COT according to the first control information.
In one possible design, the network side device includes:
a processor, transceiver and memory interconnected;
the memory is used for storing program codes, and the processor is used for calling the program codes in the memory to execute the technical scheme of the first aspect.
A fourth aspect of the present invention provides a terminal device having a function of implementing a method corresponding to the unlicensed spectrum channel occupation provided in the second aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above, which may be software and/or hardware.
In one possible design, the terminal device includes:
the receiving and transmitting module is used for receiving first control information sent by the network side equipment, wherein the first control information is used for indicating channel occupation parameters in at least one COT;
and the processing module is used for communicating with the network side equipment in the at least one COT by utilizing the transceiver module according to the first control information received by the transceiver module.
In one possible design, the terminal device includes:
a processor, transceiver and memory interconnected;
the memory is used for storing program codes, and the processor is used for calling the program codes in the memory to execute the technical scheme of the second aspect.
Compared with the prior art, in the scheme provided by the invention, the network side equipment sends the first control information for indicating the channel occupation parameter in at least one COT to at least one terminal equipment, so that the signaling overhead for dynamically informing the channel occupation parameter is reduced, the terminal equipment can know the channel occupation configuration overall during the channel occupation period, and then the monitoring of a lower channel is flexibly adjusted according to the channel occupation parameter with finer granularity provided by the first control information, thereby being beneficial to the terminal equipment to reduce the monitoring of the lower channel and correspondingly reducing the power consumption of the terminal equipment.
Drawings
Fig. 1 is a flowchart of a method for unlicensed spectrum channel occupation in the present embodiment;
FIG. 2 is a schematic diagram of a time domain unit structure in the present embodiment;
fig. 3 is another schematic diagram of a time domain unit structure in the present embodiment;
fig. 4 is another schematic diagram of a time domain unit structure in the present embodiment;
fig. 5 is another schematic diagram of a time domain unit structure in the present embodiment;
fig. 6 is a schematic structural diagram of a network side device in the present embodiment;
fig. 7 is a schematic structural diagram of a terminal device in the present embodiment;
fig. 8 is a schematic structural diagram of an entity apparatus for implementing a method for unlicensed spectrum channel occupation in this embodiment.
Detailed Description
The invention provides a method and equipment for channel occupation of unlicensed spectrum, which are mainly used for unlicensed spectrum, can provide finer granularity channel occupation parameters for terminal equipment, and enable the terminal equipment to know the channel occupation configuration overview during the channel occupation period, thereby being beneficial to reducing monitoring of downlink channels by the terminal equipment and correspondingly reducing the power consumption of the terminal equipment.
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those explicitly listed but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus, such that the division of modules by such means may be by one means of logical separation, such that a plurality of modules may be combined or integrated in another system, or some features may be omitted, or not implemented, and such that the coupling or direct coupling or communication between such modules may be by some interface, such that the coupling or communication between such modules may be electrical or otherwise similar. The modules or sub-modules described as separate components may or may not be physically separate, may or may not be physical modules, or may be distributed in a plurality of circuit modules, and some or all of the modules may be selected according to actual needs to achieve the purposes of the embodiment of the present invention.
Some concepts that may be related to embodiments of the present invention are briefly described below.
LBT: a mechanism for avoiding collision between nodes when using unlicensed spectrum resources is provided, specifically, since a communication system deployed on an unlicensed spectrum uses/shares radio resources in a contention-based manner, before transmitting signals, each node under jurisdiction first monitors whether the unlicensed spectrum is idle, for example, determines a busy state according to the magnitude of received power on the unlicensed spectrum, if the received power is less than a certain threshold, considers that there is no interference source on the unlicensed spectrum and is in a idle state, and can transmit signals on the unlicensed spectrum, otherwise, does not transmit signals.
Maximum channel occupation time length (english: maximum Channel Occupancy Time, english: MCOT): the maximum value of the channel occupation time length (English name: channel Occupancy Time, english name: COT) of one transmission process is shown. The size of the MCOT is limited by the traffic type of the transmitted data and the usage rules of the occupied unlicensed spectrum.
Time domain unit: the structure of the time domain unit mainly comprises: a full downlink time domain structure, a full uplink time domain structure, a starting downlink self-contained time domain structure and a starting uplink self-contained time domain structure. A time domain unit may be referred to as a subframe, a slot (slot), a minislot (mini-slot), or other similar names, and may be used to represent a time domain resource. Taking a subframe as an example, the length of one subframe may be 1ms. Taking a slot as an example, one slot may include 7 OFDM (Orthogonal Frequency-Division Multiplexing, orthogonal frequency division multiplexing) symbols, or one slot may include 14 OFDM symbols; taking the micro slot as an example, the number of OFDM symbols included in one micro slot may be smaller than the number of OFDM symbols included in one slot.
The network side device in the present invention is a device for accessing a terminal device to a wireless network, and may be called a base station, including but not limited to: an evolved Node B (english: evolved Node Base, english: eNB), a radio network controller (english: radio Network Controller, english: RNC), a Node B (english: node B, NB), a base station controller (english: base Station Controller, BSC), a base transceiver station (english: base Transceiver Station, BTS), a Home base station (e.g., home evolved NodeB, or Home Node B, HNB), a BaseBand Unit (english: baseBand Unit, BBU).
The Terminal Device (Terminal Device) to which the present invention relates may be a Device that provides voice and/or data connectivity to a user, a handheld Device with wireless connectivity, or other processing Device connected to a wireless modem. The terminal equipment may communicate with one or more core networks via a radio access network (acronym for english: radio Access Network; acronym for RAN), and may be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals, for example portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices, which exchange speech and/or data with the radio access network. For example, personal communication services (English full name: personal Communication Service, english short name: PCS) telephones, cordless telephones, session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, english short name: WLL) stations, personal digital assistants (English full name: personal Digital Assistant, english short name: PDA) and the like. A wireless Terminal may also be called a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), access Point (Access Point), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), terminal Device, user Agent (User Agent), user Device (User Equipment), or User Equipment (User Equipment).
Because the network side equipment or the terminal equipment obtains the unlicensed spectrum based on the competition, channel occupation parameters such as channel occupation time length, channel occupation bandwidth and the like of the unlicensed spectrum are not unchanged every time, and in order to enable the terminal equipment to timely acquire the current channel occupation parameters and be more beneficial to communication between the terminal equipment and the network side equipment, the embodiment of the invention mainly provides the following technical scheme for providing the current channel occupation parameters for the terminal equipment:
the network side equipment acquires the control right of the channel, then determines one COT occupying the channel, generates control information for indicating the channel occupying parameter in at least one COT, and transmits the generated control information to at least one terminal equipment, wherein the terminal equipment can perform uplink transmission and downlink reception according to the channel occupying parameters with fine granularity because the terminal equipment is indicated with the channel occupying parameters with fine granularity, and one of the advantages is that: the purpose that the terminal equipment monitors the channel only when the terminal equipment needs to monitor the channel is achieved, so that the power consumption of the terminal equipment is reduced.
Referring to fig. 1, the following illustrates a method for occupying an unlicensed spectrum channel, in which, in an unlicensed spectrum scenario, a network side device needs to schedule spectrum resources therein, and after obtaining control rights of a first channel, the network side device sends control information of the first channel to each terminal device, so that each terminal device can determine a time-frequency position for receiving downlink scheduling information, thereby receiving data according to downlink receiving authorization in the downlink scheduling information, and sending data according to uplink sending authorization in the downlink scheduling information. The embodiment of the invention specifically comprises the following steps:
101. The network side device generates first control information.
The first control information is used for indicating channel occupation parameters in at least one COT. Considering that the channel occupation parameters in each cog of the unlicensed spectrum acquired based on contention are not identical, the first control information may include only the public control information for describing the public channel occupation parameters in the current cog, and/or include the public control information for describing the public channel occupation parameters in one or more subsequent cobs, or include only the private control information for describing the channel occupation parameters in the current cog, or include only the private control information for describing the channel occupation parameters in one subsequent cog, or include both the public control information and the private control information.
Specifically, the first control information may indicate that the terminal device occupies the first channel in one COT, or may indicate that the terminal device occupies the first channel in a subsequent COT. The first control information may be used only to control the terminal device to occupy the first channel in the current COT; the method can also be used for controlling the terminal equipment to occupy the first channel in a plurality of COTs; it is also possible to inform the terminal device how to occupy the first channel in the first COT only when informing the terminal device for the first time, and the following COTs do not inform the terminal device in addition, but follow the control information in the first COT by default to occupy the first channel. The control information in the invention is for each channel occupation, and the control information of the occupied channel of the terminal equipment after each LBT changes along with the change of factors such as the service type, so the network side equipment needs to dynamically generate one control information according to the change of the service type, and the generated control information can be issued to the terminal equipment after each control right of the channel is obtained.
The following description is made with respect to a channel occupation parameter indicated by the first control information:
the channel occupancy parameter may comprise at least one of the following information elements:
a first COT of the at least one COT, a frequency domain parameter used to transmit signals within the first COT, a time domain cell structure within the first COT, or first transmission trigger information.
Wherein, the first COT of the information element refers to any COT in at least one COT, and if the first COT refers to the last COT, the indicated channel occupation parameter in the first COT is only applicable to data transmission in the first COT; if the first COT does not refer to the last COT, the indicated channel occupation parameter in the first COT may be used only for data transmission in the first COT and may also be used for data transmission in several cobs after the first COT. The information element first COT may be expressed in time units such as us or ms, or may also be expressed in the number of OFDM symbols contained within the first COT. Illustratively, if 10bits are used to indicate the first COT of the information element, if the value unit is us, the value range of the first COT of the information element is [ 0-1023 ] us; if the value unit is a symbol, the value range of the first COT of the information element is [ 0-1023 ] symbols. The range of values of the information element may be extended by indicating granularity (or quantization accuracy) without increasing the number of bits used to indicate the first COT of the information element. For example, when the granularity is indicated as 1 OFDM symbol, 2bits (in total [00,01,10,11] four cases) can represent [0,1,2,3] symbols; when the indication granularity is 2 OFDM symbols, 2bits can represent [0,2,4,6] symbols; when the granularity is indicated as 3 OFDM symbols, 2bits may represent 0,3,6,9 symbols.
Taking the information element first COT as an example, and taking the number of OFDM symbols contained in the first COT as an example, when the type or length of a Cyclic Prefix (CP) is known (such as a conventional CP by default), the terminal device can be informed of the subcarrier spacing of the OFDM symbol in a display or implicit manner through the channel occupation parameter, because the length of the OFDM symbol is mainly determined by the size of the subcarrier spacing in the frequency domain thereof; otherwise, the terminal device needs to be informed of the CP type or length by the channel occupation parameter or other means. Illustratively, the first control information includes a configuration parameter for representing the OFDM symbol of the first COT, which may include, but is not limited to, at least one of a length, a subcarrier spacing, a CP type, or a length. An implicit manner may be that the parameter used to represent the OFDM symbol of the first COT is configured to be the same as the parameter used to transmit the first control information, or that the subcarrier interval corresponding to the OFDM symbol used to represent the first COT is the same as the maximum subcarrier interval used for downlink transmission, or that the subcarrier interval corresponding to the OFDM symbol used to represent the first COT is the same as the maximum subcarrier interval on each subband indicated in the frequency domain parameter used for transmitting the signal in the first COT.
The frequency domain parameters used for transmitting signals in the first COT mainly comprise a maximum channel frequency domain bandwidth used for transmitting signals in the first COT and frequency domain subband parameters used in the first COT, and the maximum channel frequency domain bandwidth used for transmitting signals in the first COT means that: and in the first COT, the bandwidth which can be occupied by the terminal equipment for transmitting the signal (including receiving the signal from the network side equipment and transmitting the signal to the network side equipment) can be only smaller than or equal to the maximum channel bandwidth indicated by the first control information.
The frequency domain subband parameters used within the first COT refer to: indication information for indicating frequency band division, subcarrier spacing in each subband, and cyclic prefix length, the indication information comprising any one of the following a, b, and c:
a. at least one of a value of band division, a value of subcarrier spacing on each subband, or a value of cyclic prefix length.
b. At least one of a sequence number indicating a band division, a sequence number indicating a subcarrier spacing on each subband, or a sequence number indicating a cyclic prefix length.
c. And indicating a sequence number of a preset combination, wherein the preset combination comprises at least one of frequency band division, subcarrier spacing on each subband and cyclic prefix length.
Because the network side equipment configures various frequency domain parameters for the terminal equipment when the terminal equipment performs uplink transmission and downlink reception, the frequency domain parameters can be indicated to the terminal equipment through a, b or c, so that the terminal equipment can accurately and rapidly acquire the frequency domain parameters, and signaling overhead can be saved when the c is indicated.
The time domain unit structure in the first COT means: the type of time domain cell structure within the first COT and/or the length of the time domain cell structure within the first COT. The time domain unit type refers to whether a time domain unit is a downlink time domain unit, an uplink time domain unit, a partial time domain unit, a special time domain unit (a starting downlink self-contained time domain unit or a starting uplink self-contained time domain unit) or a blank time domain unit. The time domain unit length is a duration of the time domain unit, and the present invention is not limited with respect to the length division of the time domain unit. If the time domain unit structure within the first COT contains the length of each time domain unit, then the information element of the first COT need not be carried. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can monitor the downlink channel only when the time domain unit is in the downlink, so that the power consumption can be reduced, and the uplink transmission is performed in the uplink time domain part according to the time domain unit structure in the first COT, so that the purpose of optimizing the uplink transmission and downlink receiving mechanism of the terminal device is achieved.
The length of a time domain unit may be expressed in time units such as us or ms, or may be expressed in OFDM symbols contained in the time domain unit, or may be expressed in terms of whether the time domain unit is a subframe, a slot, or a minislot.
Illustratively, one way to indicate the structure of the time domain units in the first COT is to indicate at least the length of the first time domain unit, or the length of the last time domain unit, or the lengths of the first time domain unit and the last time domain unit in the first COT, where the above-mentioned manner of indicating the lengths may be implemented by indicating the number of OFDM symbols included in the time domain unit or other manners. In other embodiments, the network-side device may also indicate the number of other time-domain units (e.g., in subframes, slots, or minislots) between the first and last time-domain units.
In some embodiments, when there are one or more guard intervals for downlink-uplink conversion (including a transmit-receive conversion time required to be reserved between downlink transmission and uplink transmission, and a time required for LBT (which may be zero)) in the first COT, that is, when downlink transmission and uplink transmission are required in the first COT, a method for indicating a time domain unit structure in the first COT is a structure indicating at least a time domain unit including the guard interval for downlink-uplink conversion, and taking a time domain unit as an example, a time slot includes a downlink transmission portion and an uplink transmission portion, where the downlink transmission portion and the uplink transmission portion may be minislots, the time domain unit is one time slot and includes two minislots and a structure of the guard interval located between the two minislots. In other embodiments, the network side device may further indicate a guard interval of the downlink-uplink conversion or a starting time of a time domain unit (such as a time slot) where the guard interval is located in the first COT, for example, a time offset relative to the starting time of the first COT.
The network side device indicates to the terminal device the time domain unit structure in the first COT further includes: if the first control information indicates that one COT includes 8 subframes and the first subframe is a downlink subframe and the other subframes are uplink subframes, if the terminal device does not receive the uplink transmission authorization information about itself in the downlink control signaling of the first subframe, the terminal device can not monitor the downlink channel from the second subframe and enter into the energy-saving or sleep mode, thereby reducing the power consumption of the terminal device.
The first transmission trigger information is trigger information capable of triggering one-time COT transmission, so that the terminal device can perform uplink transmission on an uplink transmission portion after receiving the first transmission trigger information, and specifically, the first transmission trigger information can be used for indicating the terminal device: and in the first COT triggered by the network side equipment, the terminal equipment contends for the channel when using the LBT (such as the second type LBT) with the time length lower than the first threshold value, and then performs uplink transmission. The first transmission trigger information may be a specific random sequence, such as a synchronization sequence or a preamble sequence, which may play a role in triggering one-time COT transmission, so that the terminal device may perform uplink transmission in the first COT.
The validity period of each channel occupation parameter is calculated from the sending time or the ending time of the first control information carrying the channel occupation parameter.
In addition, before the network side device generates the first control information, the network side device also needs to obtain the control right of the first channel, and the manner of obtaining the control right mainly includes the following two modes:
A. the control right is obtained by the network side equipment
1. Before the network side equipment performs downlink transmission, the network side equipment contends for the first channel through LBT, and after the network side equipment successfully contends for the first channel, the network side equipment can perform downlink transmission through the contended first channel, and meanwhile, the first control information is generated and is sent to at least one terminal equipment.
2. When knowing that the terminal equipment has uplink transmission requirements, the network side equipment competes for the first channel through LBT, and after successfully competing for the first channel, the network side equipment can generate the first control information, send the first control information to at least one terminal equipment, and respectively send uplink transmission authorization information for indicating the terminal equipment to perform uplink transmission to each terminal equipment, so that each terminal equipment performs uplink transmission on time-frequency resources indicated by the uplink transmission authorization information.
After the network side device issues the first control information to each terminal device, each terminal device may compete for the first channel in the COT triggered by the network side device according to the indication content of the first control information by using the LBT with a time length lower than the first threshold, and then perform uplink transmission, where the time domain unit structure diagram in one COT transmission triggered by the network side device may refer to fig. 2, i is a positive integer, and the Data (Data) transmitted in each COT may include uplink Data and/or downlink Data.
B. The terminal device obtains the control right
The terminal equipment can occupy the first channel through the LBT, acquire the control right of the first channel, then use the first channel for uplink transmission, and correspondingly trigger the primary channel occupation aiming at the first channel.
After the terminal equipment obtains the control right of the first channel, the condition of triggering the terminal equipment adjacent to the physical position of the terminal equipment to carry out uplink transmission mainly comprises the following three conditions (1), (2) and (3):
(1) The terminal device may transfer the authority of the resource allocation of the first channel to the network side device, so that the network side device may control the first channel. After the control right is obtained, the network side equipment firstly generates the first control information, and then the first control information can be sent to each terminal equipment in a time domain unit which can be transmitted in a downlink after the terminal equipment performs uplink transmission. In the case of the above (1), since the network side device has obtained the control right, the terminal devices that receive the first control information may use the LBT with the duration lower than the first threshold to contend for the first channel, and the physical locations between the respective terminal devices may not be required, or may be adjacent to each other or not.
As shown in fig. 3, in the scenario where the terminal device triggers the COT transmission, after the network side device acquires the control right of the channel, the time for issuing the control information may be as shown in fig. 3, where fig. 3 is the COT triggered by the terminal device i In the time domain unit structure, DL Trigger of fig. 3 represents first control information issued by the network side device in a first downlink time domain portion after the terminal device initiates uplink transmission, where the DL Trigger may include current COT i Indicating information of remaining duration of COT i The internally transmitted Data (Data) may include upstream Data and/or downstream Data.
(2) The terminal device sends second transmission trigger information, so that the terminal device adjacent to the physical position of the terminal device is triggered to carry out uplink transmission, the second transmission trigger information can be sent to other terminal devices adjacent to the physical position of the terminal device in a mode similar to a discovery signal, and the second transmission trigger information can be carried in the uplink signal sent by the terminal device.
(3) The terminal equipment does not send the second transmission triggering information, but the terminal equipment adjacent to the physical position of the terminal equipment regards the uplink transmission of the terminal equipment as the triggering of one channel occupation, so that the uplink transmission of the terminal equipment can trigger the terminal equipment adjacent to the physical position of the terminal equipment to carry out the uplink transmission.
In case (3), as shown in fig. 4, the time domain unit structure in at least one COT occupied by the channel triggered by the terminal device is arranged in increasing order from left to right, and fig. 4 is the first COT 1 The time domain unit structure in the frame indicates the initial uplink transmission of the terminal device, another terminal device can use the uplink transmission of the terminal device in fig. 4 as DL Trigger, in the COT 1 And the channel is contended through LBT, and the subsequent terminal equipment triggers COT transmission to be the same, and the description is omitted. Another terminal device may be a plurality of terminal devices, each of the plurality of terminal devices may use a shorter LBT to contend for the channel and may contend for the channel via the LBT, after which the uplink transmission may be performed.
In both cases (2) and (3) above, the terminal device adjacent to the physical location of the terminal device only needs to use LBT with a time length below the first threshold to contend for the first channel.
For the COT triggered by the terminal device, the terminal device uses a first channel in at least one third COT to send an uplink signal to the network side device, after the network side device obtains the control right, another terminal device also receives the first control information sent by the network side device, then the other terminal device can compete for the first channel in the corresponding at least one third COT through the LBT with the duration lower than the first threshold, and performs uplink sending and/or downlink receiving in the at least one third COT triggered by the terminal device, and the physical location of the other terminal device is near the terminal device.
From the effect of the first control information, the network side device can inform the terminal device of channel occupation parameters required by subsequent transmission each time, so that the terminal device can carry second transmission trigger information in a transmitted uplink signal when uplink transmission is performed, the second transmission trigger information refers to that the network side device informs the terminal device of certain channel occupation parameters of subsequent transmission in advance, and in a COT transmission scene triggered by the terminal device, the terminal device can forward the second transmission trigger information to other terminal devices. The second transmission triggering information may be used to notify the network side device and/or other terminal devices: and taking the initial transmission time of the first terminal equipment for uplink transmission in each COT in at least one third COT triggered at the time as the uplink triggering time. Or the second transmission triggering information is not carried, and the uplink transmission actively initiated by the terminal equipment can also play a role of the second transmission triggering information. Optionally, if the channel occupied by the terminal device is the same as the channel occupied by the terminal device before, because each time the channel is occupied, some channel occupied parameters will be changed, and some common channel occupied parameters in the second transmission trigger information may still come from the first control information issued by the network side device before.
It should be noted that, the situations where the terminal devices compete for the first channel are mainly the following categories:
1. the terminal device may directly actively contend for the first channel.
2. The terminal device may actively contend for the first channel when the following situations occur, so as to obtain the control right of the first channel, for example, when there is no downlink time domain part in the time domain unit structure used for transmitting signals in the second COT in the at least one COT, or when the downlink time domain part in the time domain unit structure used for transmitting signals in the COT triggered by the network side device (for example, the first COT) cannot be used for the second transmission triggering information, the terminal device may contend for the channel, or when the terminal device cannot complete uplink transmission in the COT triggered by the network side device, the terminal device may contend for the channel through LBT after the end of the COT triggered by the current network side device, and perform uplink transmission after the contention channel is successful, so as to trigger a new COT transmission.
3. The network side equipment informs the terminal equipment of certain channel occupation parameters required by subsequent transmission in advance, so that the terminal equipment can compete for the channel through LBT and carry second transmission triggering information in uplink transmission after channel competition is successful.
Furthermore, for terminal device triggered COT transmission, the terminal device needs to contend for the channel by LBT with a length above the second threshold (e.g., class four LBT) before triggering a new COT transmission. In the scenario of more uplink traffic, if each terminal device spontaneously passes through the LBT contention channel, the transmission efficiency will be affected, so in order to ensure that multiple users transmit simultaneously, the terminal device may be limited to pass through the LBT contention channel. For example, a random backoff period of each terminal device monitoring channel may be specified, and correspondingly, a length of the LBT with a time length higher than the second threshold is related to the random backoff period when the terminal device monitors the channel, and by specifying the random backoff period of each terminal device monitoring channel, orderly simultaneous multi-user transmission may be ensured, so as to improve transmission efficiency of simultaneous multi-user transmission.
After the network side device obtains the control right of the first channel, the COT of the first channel can be determined, then control information is generated and sent to the terminal device, COT indicated in the control information sent for the first time in the COT is the occupied duration of the whole channel, and the channel occupied duration indicated in the control information sent in the subsequent data transmission is the remaining duration of the COT. In addition, the content of the control information sent for each data transmission within one COT may be the same or different.
102. The network side device sends the first control information to at least one terminal device.
The first control information may be sent through a common control signaling or a downlink control signaling of a dedicated control signaling or an authorized channel of the terminal device, where the common control signaling or the dedicated control signaling or the downlink control signaling of the authorized channel of the terminal device includes a control field, where the control field is used to carry the first control information, and the first control information carried by the control field may be marked as DL Trigger.
The first control information may be sent from a downlink transmission start time of the first COT, for example, a downlink time domain portion in a time domain unit for transmitting signals in the first COT, or sent at the start time of the first COT, or at a start downlink transmission time after a start uplink transmission in the first COT, or sent at a start downlink time domain portion after a start uplink transmission in the first COT.
Taking a terminal device triggering one-time COT transmission scenario as an example, when the network side device sends control information, an initial uplink self-contained time domain unit structure, a downlink time domain unit structure or a downlink self-contained time domain unit structure may be adopted, specifically, referring to fig. 5, fig. 5 may be a time domain unit structure in at least one COT, and arranged according to time domain increasing sequence from left to right, i in the figure is a positive integer, and Data (Data) transmitted in each COT may include uplink Data and/or downlink Data. Fig. 5 (a) shows a time domain cell structure (i.e., a downlink time domain cell structure) in the ith COT, DL Trigger in the ith COT is after LBT and before downlink data transmission, and DL Trigger indicates the total duration of the COT.
Fig. 5 (b) is a time domain unit structure (i.e., an initial uplink self-contained time domain unit structure) in the (i+1) th COT, DL Trigger in fig. 5 (b) represents control information issued by the network side device in the first downlink time domain portion after the terminal device initiates uplink transmission, and DL Trigger indicates the remaining duration of the COT. Of course, the time domain location at which control information is transmitted within each COT may vary according to the structure of the time domain unit.
In addition, because the information transmitted in the DL trigger may include the most basic channel occupation parameter in the COT, a default time-frequency structure may be used to transmit the DL trigger, so that more terminal devices can understand the DL trigger, for example, the frequency domain position and subcarrier interval of the channel used to transmit the DL trigger are preconfigured to be fixed values, and the DL trigger may be carried in a time domain unit where a periodic Discovery Signal (abbreviated as DRS) is located, or carried in a system broadcast message, or may also be indicated by a downlink control signaling of an authorized channel.
The at least one terminal device may include at least one terminal device using the same time domain resource and different frequency domain resources, may include at least one terminal device using different time domain resources and the same frequency domain resources, and may include at least one terminal device using different time domain resources and different frequency domain resources. And the terminal equipment using the same time domain resource performs uplink transmission in the same uplink time domain part in the same at least one COT.
In the present invention, the network side device may further continue to send the first control information in one COT, so as to avoid that some terminal devices do not monitor the first control information when initializing the channel.
103. And the at least one terminal device and the network side device communicate in the at least one COT according to the first control information.
Each of the at least one terminal device may receive the first control information, where the control information may be sent to the at least one terminal device at the same time during initial delivery, or may be sent to the at least one terminal device in a broadcast message or a periodic signal during subsequent communication interaction.
If the terminal device does not complete uplink transmission in the first COT, the network side device may further determine at least one COT using the first channel again, and then send corresponding control information to the at least one terminal device, where the control information is a channel occupation parameter in the at least one COT determined at this time, so that the at least one terminal device communicates with the network side device in the at least one COT determined at this time according to the control information. The control information may be the same as or different from the previous first control information, and may be channel occupation parameters for the same channel (first channel) or different channels (other channels), and the specific carried channel occupation parameters are not limited in the present invention.
In addition, the terminal device performs uplink transmission in the COT triggered by the terminal device, or performs uplink transmission in the COT triggered by another terminal device, where a specific flow of triggering COT transmission by another terminal device is the same as the control right of the first channel obtained by the terminal device described in the foregoing section, so that a new COT transmission flow is triggered, and details are not repeated. Correspondingly, after the other terminal device triggers a COT transmission for the second channel, the other terminal device also transfers the control right of the second channel to the network side device, the network side device generates a corresponding second control information, and then the second control information is sent to each terminal device (including the terminal device and the other terminal device), and the channel occupation parameter carried by the second control information can refer to the description of the first control information, which is not repeated here. Then, after receiving the second control information, the terminal device may communicate with the network device in at least one fourth COT indicated by the second control information according to the channel occupation parameter in at least one fourth COT indicated by the second control information.
Compared with the existing mechanism, in the embodiment of the invention, the network side equipment sends the first control information for indicating the channel occupation parameter in at least one COT to at least one terminal equipment, so that the signaling overhead for dynamically informing the channel occupation parameter is reduced, the terminal equipment can know the channel occupation configuration overall view during the channel occupation period, and then the monitoring of the downlink channel is flexibly adjusted according to the channel occupation parameter with finer granularity provided by the first control information, thereby being beneficial to the terminal equipment to reduce the monitoring of the downlink channel and correspondingly reducing the power consumption of the terminal equipment.
When there are multiple cells, if the terminal device receives channel occupation parameters in the COT of other cells, in order to reduce transmission interference or channel resource occupation conflict, the terminal device can judge which time domain units in one COT can not carry out uplink transmission according to the channel occupation parameters, and after waiting for the COT to end, the terminal device carries out LBT to trigger a new COT.
Correspondingly, when there are multiple cells, if the network side device receives the channel occupation parameters in the COT of other cells, in order to reduce transmission interference or channel resource occupation conflict, the network side device can judge which time domain units in one COT can occupy the channel resource according to the channel occupation parameters, and can wait for the end of the COT and then perform LBT to occupy the channel.
The method for unlicensed spectrum occupation in the present invention is described above, and a network side device and a terminal device for executing the method are described below. Regarding the channel occupation parameters in any of the schemes shown in fig. 1 to fig. 5, the sending time, sending manner and control action of the first control information and the second control information, the first transmission trigger information, the second transmission trigger information and the like may be applicable to the network side device 60 and the terminal device 70, which are not described in detail later.
1. Referring to fig. 6, a description will be given of a network-side device 60, the network-side device 60 including:
a processing module 601, configured to generate first control information, where the first control information is used to indicate a channel occupation parameter in at least one COT;
and the transceiver module 602 is configured to send first control information to at least one terminal device, so that the at least one terminal device communicates with the network side device in the at least one COT according to the first control information.
2. Referring to fig. 7, a description will be given of a terminal device 70, the terminal device 70 including:
a transceiver module 701, configured to receive first control information sent by a network side device, where the first control information is used to indicate a channel occupation parameter in at least one COT;
And a processing module 702, configured to communicate with the network side device within the at least one COT using the transceiver module according to the first control information received by the transceiver module 701.
The processing module 702 is further configured to use an LBT contention channel with a time length above a second threshold;
the length of the LBT with a time length higher than the second threshold is related to the random back-off time length when the terminal device listens to the channel.
In some inventive embodiments, the processing module 702 is further configured to:
and when the time domain unit structure used for transmitting signals in the second COT in the at least one COT does not have a downlink time domain part, or when the downlink time domain part in the time domain unit structure used for transmitting signals in the first COT cannot be used for second transmission triggering information, using the channel or another channel in at least one third COT, and using the transceiver module 701 to send an uplink signal to the network side device, so that the LBT with the length lower than the first threshold value used by the other terminal device contends for the channel or the another channel, and performs uplink transmission in the at least one third COT.
The uplink signal carries the second transmission trigger information, where the second transmission trigger information is used to notify the network side device and/or the other terminal device: and taking the initial transmission time of the terminal equipment for uplink transmission of the first one in each COT in the at least one third COT as an uplink trigger time.
In some inventive embodiments, the processing module 702 is further configured to:
receiving second control information sent by the network side equipment by utilizing the transceiver module, wherein the second control information indicates channel occupation parameters in at least one fourth COT triggered by the other terminal equipment;
and according to the channel occupation parameter in the at least one fourth COT indicated by the second control information received by the transceiver module 701, communicating with the network side device in the at least one fourth COT indicated by the second control information by using the transceiver module 701.
It should be noted that, in each embodiment of the present invention (including each embodiment shown in fig. 6 and fig. 7), the entity devices corresponding to all the transceiver modules may be transceivers, and the entity devices corresponding to all the processing modules may be processors. Each of the devices shown in fig. 6 and fig. 7 may have a structure as shown in fig. 8, and when one of the devices has a structure as shown in fig. 8, the processor and the transceiver in fig. 8 can implement the same or similar functions as the processing module and the transceiver module provided by the device embodiment corresponding to the device, and the memory in fig. 8 stores the program code that needs to be invoked when the processor performs the above-mentioned method for unlicensed spectrum occupation.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, apparatuses and modules described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory), a magnetic disk or an optical disk, etc. various media capable of storing program codes.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the invention that follows may be better understood, and in order that the present principles and embodiments may be better understood; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (30)

1. A method of unlicensed spectrum channel occupation, the method comprising:
the network side equipment generates first control information, wherein the first control information is used for indicating channel occupation parameters in at least one COT, and the channel occupation parameters comprise: a first COT of the at least one COT and a subcarrier spacing of the first COT, the first COT represented by a number of OFDM symbols contained within the first COT;
the network side equipment sends first control information to at least one terminal equipment so that the at least one terminal equipment can communicate with the network side equipment in the at least one COT according to the first control information.
2. The method of claim 1, wherein the channel occupancy parameter further comprises one of:
frequency domain parameters used for transmitting signals in the first COT, time domain unit structures in the first COT or first transmission trigger information.
3. The method of claim 2, wherein the first control information is sent from a downlink transmission start time within the first COT.
4. A method according to claim 2 or 3, wherein the first transmission trigger information is for: and in the first COT triggered by the network side equipment, the terminal equipment uses an LBT contention channel with the time length lower than a first threshold value.
5. A method according to claim 2 or 3, characterized in that the first control information is sent by means of common control signaling or terminal device specific control signaling or downlink control signaling of an grant channel.
6. The method of claim 1, wherein the network side device sends, in the first terminal device triggered COT, second control information after uplink transmission of the first terminal device, where the second control information indicates a channel occupation parameter of the first terminal device triggered COT.
7. A method of unlicensed spectrum channel occupation, the method comprising:
the terminal equipment receives first control information sent by the network side equipment, wherein the first control information is used for indicating channel occupation parameters in at least one COT, and the channel occupation parameters comprise: a first COT of the at least one COT and a subcarrier spacing of the first COT, the first COT represented by a number of OFDM symbols contained within the first COT;
and the terminal equipment communicates with the network side equipment in the at least one COT according to the first control information.
8. The method of claim 7, wherein the channel occupancy parameter further comprises one of:
frequency domain parameters used for transmitting signals in the first COT, time domain unit structures in the first COT or first transmission trigger information.
9. The method of claim 8, wherein the first control information is sent from a downlink transmission start time within the first COT.
10. The method according to claim 8 or 9, wherein the first transmission trigger information is for: and triggering the LBT competition channel with the use time length lower than a first threshold value in the first COT triggered by the network side equipment.
11. The method according to claim 10, wherein the method further comprises:
the terminal equipment uses LBT competition channels with the time length higher than a second threshold value;
the length of the LBT with a time length higher than the second threshold is related to the random back-off time length when the terminal device listens to the channel.
12. The method according to claim 8 or 9, characterized in that the method further comprises:
and when the time domain unit structure used for transmitting signals in the second COT in the at least one COT does not have a downlink time domain part, or when the downlink time domain part in the time domain unit structure used for transmitting signals in the first COT cannot be used for second transmission triggering information, the terminal equipment uses the channel or another channel in at least one third COT to send uplink signals to the network side equipment, so that LBT with the length lower than a first threshold value when the other terminal equipment is used competes for the channel or the another channel, and uplink transmission is performed in the at least one third COT.
13. The method according to claim 12, wherein the uplink signal carries the second transmission trigger information, and the second transmission trigger information is used to notify the network side device and/or the other terminal device: and taking the initial transmission time of the terminal equipment for uplink transmission of the first one in each COT in the at least one third COT as an uplink trigger time.
14. The method according to claim 12, wherein the method further comprises: the terminal equipment receives second control information sent by the network side equipment, wherein the second control information indicates channel occupation parameters in at least one fourth COT triggered by the other terminal equipment;
and the terminal equipment communicates with the network side equipment in the at least one fourth COT indicated by the second control information according to the channel occupation parameter in the at least one fourth COT indicated by the second control information.
15. The method of claim 14, wherein the first control information and the second control information are sent via common control signaling or terminal device specific control signaling or downlink control signaling of an grant channel.
16. A network side device, characterized in that the network side device comprises:
the processing module is configured to generate first control information, where the first control information is used to indicate a channel occupation parameter in at least one COT, and the channel occupation parameter includes: a first COT of the at least one COT and a subcarrier spacing of the first COT, the first COT represented by a number of OFDM symbols contained within the first COT;
And the receiving and transmitting module is used for transmitting the first control information to at least one terminal device so that the at least one terminal device can communicate with the network side device in the at least one COT according to the first control information.
17. The network-side device of claim 16, wherein the channel occupancy parameter further comprises one of:
frequency domain parameters used for transmitting signals in the first COT, time domain unit structures in the first COT or first transmission trigger information.
18. The network-side device of claim 17, wherein the first control information is sent from a downlink transmission start time within the first COT.
19. The network-side device according to claim 17 or 18, wherein the first transmission trigger information is for: and in the first COT triggered by the network side equipment, the terminal equipment uses an LBT contention channel with the time length lower than a first threshold value.
20. The network side device according to claim 16 or 17, wherein the first control information is sent through a common control signaling or a terminal device specific control signaling or a downlink control signaling of an grant channel.
21. The network side device of claim 16, wherein the transceiver module is configured to send, in the first terminal device triggered COT, second control information after uplink transmission of the first terminal device, where the second control information indicates a channel occupation parameter of the first terminal device triggered COT.
22. A terminal device, characterized in that the terminal device comprises:
the transceiver module is configured to receive first control information sent by a network side device, where the first control information is used to indicate a channel occupation parameter in at least one COT, and the channel occupation parameter includes: a first COT of the at least one COT and a subcarrier spacing of the first COT, the first COT represented by a number of OFDM symbols contained within the first COT;
and the processing module is used for communicating with the network side equipment in the at least one COT by utilizing the transceiver module according to the first control information received by the transceiver module.
23. The terminal device of claim 22, wherein the channel occupancy parameter further comprises one of:
frequency domain parameters used for transmitting signals in the first COT, time domain unit structures in the first COT or first transmission trigger information.
24. The terminal device of claim 23, wherein the first control information is sent from a downlink transmission start time within the first COT.
25. The terminal device according to claim 23 or 24, wherein the first transmission trigger information is for: and triggering the LBT competition channel with the use time length lower than a first threshold value in the first COT triggered by the network side equipment.
26. The terminal device of claim 25, wherein the processing module is further configured to:
LBT contention channels with a time length above a second threshold;
the length of the LBT with a time length higher than the second threshold is related to the random back-off time length when the terminal device listens to the channel.
27. The terminal device according to claim 23 or 24, wherein the processing module is further configured to:
and when the time domain unit structure used for transmitting signals in the second COT in the at least one COT does not have a downlink time domain part, or when the downlink time domain part in the time domain unit structure used for transmitting signals in the first COT cannot be used for second transmission triggering information, using the channel or another channel in at least one third COT, and transmitting an uplink signal to the network side equipment by utilizing the transceiver module, so that LBT with the length lower than a first threshold value when the other terminal equipment is used contends for the channel or the another channel, and carrying out uplink transmission in the at least one third COT.
28. The terminal device according to claim 27, wherein the uplink signal carries the second transmission trigger information, and the second transmission trigger information is used to notify the network side device and/or the other terminal device: and taking the initial transmission time of the terminal equipment for uplink transmission of the first one in each COT in the at least one third COT as an uplink trigger time.
29. The terminal device of claim 27, wherein the processing module is further configured to:
receiving second control information sent by the network side equipment by utilizing the transceiver module, wherein the second control information indicates channel occupation parameters in at least one fourth COT triggered by the other terminal equipment;
and according to the channel occupation parameter in the at least one fourth COT indicated by the second control information received by the transceiver module, communicating with the network side equipment in the at least one fourth COT indicated by the second control information by using the transceiver module.
30. The terminal device of claim 29, wherein the first control information and the second control information are sent via common control signaling or terminal device specific control signaling or downlink control signaling of an grant channel.
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