WO2019061335A1

WO2019061335A1 - Channel monitoring method, access-network device, terminal device, and communications system

Info

Publication number: WO2019061335A1
Application number: PCT/CN2017/104513
Authority: WO
Inventors: 杨美英; 马莎; 官磊
Original assignee: 华为技术有限公司
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2019-04-04

Abstract

The present application provides a channel monitoring method, access-network device, terminal device, and communications system, which are advantageous to the improvement of the performance of a communications system. The method comprises: a first access-network device receiving a signal on an unlicensed frequency band resource; according to the signal type of the received signal, said first access-network device determining a first power measurement threshold, the signal type of the signal comprising at least one of the following: a first-type signal from at least one second access-network device other than the first access-network device, and a second-type signal from at least one terminal device; according to said first power measurement threshold, the first access-network device performing clear channel assessment.

Description

Channel interception method, access network device, terminal device and communication system

Technical field

The present application relates to the field of communications, and more particularly to a method of channel listening, an access network device, a terminal device, and a communication system.

Background technique

In order to improve spectrum utilization, the wireless communication system can transmit data in the unlicensed frequency band, and the communication device (for example, the access network device or the terminal device) can use the resources of the unlicensed band for data transmission in a competitive manner. Specifically, in order to avoid the problem of the degradation of the reception performance caused by the interference, the communication device can listen to the channel before using the resources of the unlicensed band, and can continuously occupy the channel after the channel is idle. The communication device can determine whether the channel is idle by means of, for example, signal detection, energy detection (or power detection).

In some systems that use an unlicensed band, for example, a Licensed-Assisted Access Using (LAA)-Long Term Evolution (LTE) system, due to the deployment of multiple cells, neighboring cells It is possible to interfere with each other, for example, interference caused by an uplink signal, interference caused by a downlink signal, and interference caused by noise. The communication device may perform a Clear Channel Assessment (CCA) by using a channel interception method, for example, determining whether the channel is idle by means of energy detection or the like. In the process of idle channel estimation, the communication device (more specifically, the transmitting device) usually determines whether the channel is idle by using a preset energy detection threshold (or power detection threshold) and a received power relationship of the signal. When this method is applied to some special scenes, the judgment result may not be particularly accurate. If the communication device determines whether to transmit a signal according to a result that may be inaccurate, it may cause the communication device to transmit a signal at an inappropriate timing to cause a decrease in reception performance, or waste resources at a suitable timing because the signal is not transmitted. This results in a performance degradation of the entire communication system.

Summary of the invention

The present invention provides a channel listening method, an access network device, a terminal device, and a communication system, to determine a power detection threshold according to a signal type of a received signal, which is beneficial to improving channel sensing accuracy, thereby improving the communication system. Performance.

In a first aspect, a method for channel listening is provided, including:

The first access network device receives the signal on the unlicensed band resource;

Determining, by the first access network device, a first power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: from the first access network device a first type of signal from at least one second access network device, a second type of signal from at least one terminal device;

The first access network device performs an idle channel assessment according to the first power detection threshold.

Based on the foregoing technical solution, the first access network device may determine the first power detection threshold according to the signal type of the received signal, and the value of the first power detection threshold is determined by considering interference that may be caused by different signal types. Different from the signal type of the received signal, the evaluation result is more accurate than the prior art using the fixed power detection threshold for the idle channel estimation, that is, the channel sensing accuracy is improved, so that the The probability that an access network device sends a signal also varies with the signal type of the received signal. Therefore, it is beneficial to improve resource utilization and data reception performance, thereby contributing to improving the performance of the communication system.

With reference to the first aspect, in some possible implementations, the first access network device determines, according to the received signal type of the signal, a first power detection threshold, including:

The first access network device determines the first power detection threshold according to the received signal type of the signal and the received power of each type of signal.

Two possible implementations for determining the first power detection threshold are exemplarily provided below.

In a possible implementation manner, the method further includes:

Determining, by the first access network device, a first initial power detection threshold according to the transmit power information and the carrier bandwidth information, where the first initial power detection threshold is used to determine the first power detection threshold;

The transmit power information is the actual transmit power of the first access network device on the unlicensed band resource, or the maximum transmit power of the first access network device on the unlicensed band resource. ;

The carrier bandwidth is the actual transmission bandwidth of the first access network device on the unlicensed band resource, or the maximum transmission bandwidth of the first access network device on the unlicensed band resource.

Determining a first initial power detection threshold according to the transmit power information and the carrier bandwidth information of the first access network device, so as to determine the first power detection threshold, considering the difference between the transmit power and the carrier bandwidth used by different devices, so that the first The first power detection threshold determined by the access network device is more reasonable.

The foregoing example provides a possible implementation manner for the first access network device to determine the first initial power detection threshold, but this should not constitute any limitation on the application, and the first initial power detection threshold may also be predefined. , for example, a protocol definition.

The following is exemplarily listed several possible cases of the signals received by the first access network device and the specific manner in which the first access network determines the first power detection threshold in different situations.

Optionally, the first access network device determines the first power detection threshold according to the received signal type of the signal and the received power of each type of signal, including:

Determining, by the first access network device, the first power detection threshold, where the received power of the first type of signal meets a first preset condition, where the first power detection threshold is greater than the first initial Power detection threshold.

Determining, by the first access network device, the first power detection threshold, where the received power of the second type of signal meets a second preset condition, where the first power detection threshold is smaller than the first initial Power detection threshold.

Optionally, the first access network device determines, according to the received signal type of the signal and the received power of each type of signal, a first power detection threshold, including:

Determining, by the first access network device, that the received power of the first type of signal meets a first preset condition and the received power of the second type of signal does not satisfy a second preset condition And a power detection threshold, where the first power detection threshold is greater than the first initial power detection threshold.

Determining, by the first access network device, that the received power of the second type of signal meets the second preset condition and the received signal of the first type of signal does not satisfy the first preset condition The first power detection threshold, the first power detection threshold is smaller than the first initial power detection threshold.

Determining, in the case that the received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, the first access network device determines the first A power detection threshold, the first power detection threshold being equal to the first initial power detection threshold.

Determining, by the first access network device, the first power when the received power of the first type of signal meets a first preset condition and the received power of the second type of signal satisfies a second preset condition The threshold is detected, and the first power detection threshold is less than or equal to the first initial power detection threshold.

The foregoing various possible cases of combining the signals received by the first access network device enumerate possible implementation manners for determining the first power detection threshold, and determining, by the first access network device, the first power detection according to the current situation. The threshold can take into account the difference in power detection thresholds between devices, and the determined first power detection threshold is also more reasonable.

In another possible implementation manner, the first access network device determines, according to the received signal type of the signal, a first power detection threshold, including:

The first access network device is configured according to the received signal type of the signal, and the power detection threshold of the multiple candidates includes at least the first candidate power detection. a threshold, a second candidate power detection threshold, and a third candidate power detection threshold, wherein the first candidate power detection threshold is greater than the second candidate power detection threshold, and the second candidate power detection threshold is greater than the third candidate power detection threshold Threshold.

The following is exemplarily listed several possible cases of signals received by the first access network device and, in different cases, the first access network determines the value of the first power detection threshold.

And determining, by the first access network device, the third candidate power detection threshold as the first power detection threshold, if the received power of the first type of signal meets a first preset condition.

And determining, by the first access network device, the first candidate power detection threshold to determine the first power detection threshold if a received power of the second type of signal meets a second preset condition.

The first access network device, if the received power of the first type of signal satisfies a first preset condition and the received power of the second type of signal does not satisfy a second preset condition, the third The candidate power detection threshold is determined as the first power detection threshold.

The first access network device, when the received power of the second type of signal satisfies the second preset condition, and the received signal of the first type of signal does not satisfy the first preset condition, The first candidate power detection threshold is determined as the first power detection threshold.

If the received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, the first access network device The second candidate power detection threshold is determined as the first power detection threshold.

The second access network device, if the received power of the first type of signal satisfies a first preset condition and the received power of the second type of signal satisfies a second preset condition, the second candidate The power detection threshold is determined as the first power detection threshold, or the first candidate power detection threshold is determined as the first power detection threshold.

The various possible scenarios of the above-mentioned signals received in connection with the first access network device enumerate possible implementations for determining a first power detection threshold, which may be directly from a plurality of predefined candidates. The first power detection threshold is determined in the power detection threshold, and the implementation process is simpler and more convenient, and the calculation amount of the first access network device is reduced.

With reference to the first aspect, in some possible implementation manners, the foregoing first preset condition includes at least one of the following:

The received power of the first type of signal is greater than or equal to a preset first threshold;

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset second threshold;

The ratio of the received power of the first type of signal to the received power of the second type of signal is greater than one.

Each of the first preset conditions listed above may be used alone or in combination, which is not limited in this application.

With reference to the first aspect, in some possible implementation manners, the foregoing second preset condition includes at least one of the following:

The received power of the second type of signal is greater than or equal to a preset third threshold;

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset fourth threshold;

The ratio of the received power of the second type of signal to the received power of the first type of signal is greater than or equal to one.

Each of the second preset conditions listed above may be used alone or in combination, which is not limited in this application.

In conjunction with the first aspect, in some possible implementations, the method further includes:

The first access network device suspends transmitting a signal when the channel is busy according to the idle channel assessment result; or

The first access network device transmits a signal if the channel is idle according to the idle channel assessment result.

Therefore, the first access network device can send or not send signals according to the current channel condition according to the idle channel evaluation result, which is beneficial to improving data receiving performance and resource utilization, and helps improve the performance of the communication system.

Determining, by the first access network device, a signal type of the signal according to the received public signal, the public letter The number includes at least one of the following: an uplink reference signal, a downlink reference signal, a downlink synchronization signal, and a synchronization signal block.

With reference to the first aspect, in some possible implementations, the method is applied to a licensed assisted access LAA-Long Term Evolution (LTE) system, and the second type of signal further includes: a signal from a different system, where the different system includes A system different from the LAA-LTE system.

When the first access network device receives the signal from the different system, it cannot determine the signal type of the received signal, or can not determine whether the received signal is an uplink signal or a downlink signal, in order to ensure channel sensing. The accuracy of the signal from the different system may be determined as an anisotropic transmission signal, and for the first access network device, the signal from the different system may be the second type of signal.

By way of example and not limitation, the different systems include: a Wireless Fidelity (Wi-Fi) system.

Based on the above solution, the method provided by the present application can also be applied to a scenario in which the LAA-LTE system coexists with one or more other systems.

In a second aspect, a channel listening method is provided, including:

The first terminal device receives the signal on the unlicensed band resource;

Determining, by the first terminal device, a second power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: a first type of signal from at least one access network device a second type of signal from at least one second terminal device other than the first terminal device;

The first terminal device performs idle channel estimation according to the second power detection threshold.

Based on the foregoing technical solution, the first terminal device may determine the second power detection threshold according to the signal type of the received signal, and the value of the second power detection threshold is determined due to interference that may be caused by different signal types considered. Different from the signal type of the received signal, the evaluation result is more accurate than the prior art using the fixed power detection threshold for the idle channel estimation, that is, the channel sensing accuracy is improved, so that the The probability that a terminal device transmits a signal also varies with the signal type of the received signal. Therefore, it is advantageous to improve the data utilization performance of resource utilization, thereby contributing to improving the performance of the communication system.

With reference to the second aspect, in some possible implementation manners, the terminal device determines, according to the received signal type of the signal, a second power detection threshold, including:

The first terminal device determines the second power detection threshold according to the received signal type of the signal and the received power of each type of signal.

Two possible implementations for determining the second power detection threshold are exemplarily provided below.

In a possible implementation manner, the method further includes:

The first terminal device acquires a second initial power detection threshold, and the second initial power detection threshold is used to determine the second power detection threshold.

Optionally, the first terminal device acquires a second initial power detection threshold, including:

Determining, by the first terminal device, a first initial power detection threshold according to the transmit power information and the carrier bandwidth information, where the first initial power detection threshold is used to determine the first power detection threshold;

The transmit power information is an actual transmit power of the first terminal device on the unlicensed band resource, or a maximum transmit power of the first terminal device on the unlicensed band resource;

The carrier bandwidth is an actual transmission bandwidth of the first terminal device on the unlicensed band resource, or a maximum transmission bandwidth of the first terminal device on the unlicensed band resource.

Determining a second initial power detection threshold according to the transmit power information and the carrier bandwidth information of the first terminal device, so that The second power detection threshold is determined, and the difference between the transmission power and the carrier bandwidth used by different devices is considered, so that the second power detection threshold determined by the first terminal device is more reasonable.

The first terminal device receives first indication information from the access network device, and the first indication information indicates the second initial power detection threshold.

For the first terminal device, the method for indicating the second initial power detection threshold by the access network device can reduce the calculation amount of the first terminal device and reduce the consumption of the first terminal device.

The foregoing describes two possible implementation manners for the first terminal device to obtain the second initial power detection threshold, but this should not constitute any limitation. The second initial power detection threshold may also be predefined, for example, a protocol definition.

The following are exemplarily enumerated several possible cases of signals received by the first terminal device and specific ways in which the first terminal determines the second power detection threshold in different situations.

Optionally, the first terminal device determines the second power detection threshold according to the received signal type of the signal and the received power of each type of signal, including:

Determining, by the first terminal device, the second power detection threshold, where the received power of the first type of signal meets a third preset condition, where the second power detection threshold is smaller than the second initial power detection Threshold.

The first terminal device determines the second power detection threshold when the received power of the second type of signal meets a fourth preset condition, where the second power detection threshold is greater than the second initial power detection Threshold.

Determining, by the first terminal device, that the received power of the first type of signal meets a third preset condition and the received power of the second type of signal does not satisfy a fourth preset condition, determining the second power detection. The threshold, the second power detection threshold is less than the second initial power detection threshold.

Determining, by the first terminal device, that the received power of the second type of signal meets a fourth preset condition and the received power of the first type of signal does not satisfy a third preset condition, determining the second power detection. The threshold, the second power detection threshold is greater than the second initial power detection threshold.

Determining, by the first terminal device, the second power when the received power of the first type of signal does not satisfy the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition A threshold is detected, and the second power detection threshold is equal to the second initial power detection threshold.

Determining, by the first terminal device, the second power detection threshold if the received power of the first type of signal meets a third preset condition and the received power of the second type of signal satisfies a fourth preset condition The second power detection threshold is less than or equal to the second initial power detection threshold.

The foregoing various combinations of the signals received by the first terminal device include a possible implementation manner for determining the second power detection threshold. The first terminal device determines the second power detection threshold according to the current situation, which may be considered. The second power detection threshold determined by the difference in power detection thresholds between devices is also more reasonable.

In another possible implementation manner, the first terminal device determines, according to the received signal type of the signal, a second power detection threshold, including:

The first terminal device is configured according to the received signal type of the signal, and the power detection threshold of the multiple candidates includes at least a fourth candidate power detection threshold, a fifth candidate power detection threshold and a sixth candidate power detection threshold, wherein the fourth candidate power detection threshold is greater than the fifth candidate power detection threshold, and the fifth candidate power detection threshold is greater than the sixth candidate power detection threshold.

The following is exemplarily enumerated several possible cases of the signal received by the first terminal device and the value of the second power detection threshold determined by the first terminal in different cases.

Determining, by the first terminal device, the second power detection threshold, where the received power of the first type of signal meets a third preset condition, determining the sixth candidate power detection threshold as the second Power detection threshold.

The first terminal device determines the fourth candidate power detection threshold as the second power detection threshold if the received power of the second type of signal satisfies a fourth preset condition.

The first terminal device, when the received power of the first type of signal meets a third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, the sixth candidate power is used. The detection threshold is determined as the second power detection threshold.

The first terminal device, when the received power of the second type of signal meets a fourth preset condition and the received power of the first type of signal does not satisfy the third preset condition, the fourth candidate power is used. The detection threshold is determined as the second power detection threshold.

The first terminal device, if the received power of the first type of signal does not satisfy the third preset condition, and the received power of the second type of signal does not satisfy the fourth preset condition, the fifth candidate The power detection threshold is determined as the second power detection threshold.

The first terminal device detects the fifth candidate power when the received power of the first type of signal satisfies a third preset condition and the received power of the second type of signal satisfies a fourth preset condition. The threshold is determined as the second power detection threshold, or the sixth candidate power detection threshold is determined as the second power detection threshold.

The foregoing various possible cases of combining the signals received by the first terminal device enumerate possible implementation manners for determining a second power detection threshold, and the first terminal device may directly detect thresholds from multiple predefined powers. The second power detection threshold is determined, the implementation process is simpler and more convenient, and the calculation amount of the first terminal device is reduced.

With reference to the second aspect, in some possible implementations, the third preset condition includes at least one of the following:

The received power of the first type of signal is greater than or equal to a preset fifth threshold;

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset sixth threshold;

The received power of the first type of signal and the received power of the second type of signal are greater than or equal to one.

Each of the third preset conditions listed above may be used alone or in combination, and the present application does not limit this.

With reference to the second aspect, in some possible implementation manners, the fourth preset condition includes at least one of the following:

The received power of the second type of signal is greater than or equal to a preset seventh threshold;

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset eighth threshold;

The ratio of the received power of the second type of signal to the received power of the first type of signal is greater than one.

Each of the fourth preset conditions listed above may be used alone or in combination, and the present application does not limit this.

With reference to the second aspect, in some possible implementations, the method further includes:

The first terminal device pauses to send a signal when the channel is busy according to the idle channel evaluation result; or

The first terminal device transmits a signal when the channel is idle according to the result of the idle channel assessment.

Therefore, the first terminal device can send or not send a signal according to the current channel condition according to the idle channel evaluation result, which is beneficial to improving data receiving performance and resource utilization, and helps improve the performance of the communication system.

The first terminal device determines a signal type of the signal according to the received common signal, where the common signal includes at least one of an uplink reference signal, a downlink reference signal, a downlink synchronization signal, and a synchronization signal block.

With reference to the second aspect, in some possible implementations, the method is applied to a licensed assisted access LAA-Long Term Evolution (LTE) system, the first type of signal further comprising: a signal from a different system, the different system including A system different from the LAA-LTE system.

By way of example and not limitation, the different systems include: a Wi-Fi system.

The first terminal device cannot determine the signal type of the received signal when receiving the signal from the different system, or can not determine whether the received signal is an uplink signal or a downlink signal, in order to ensure accurate channel sensing. The signal from the different system may be determined as a signal transmitted in the opposite direction. For the first terminal device, the signal from the different system may be the first type of signal.

In a third aspect, an access network device is provided for performing the method of the first aspect and any one of the possible implementations of the first aspect. In particular, the access network device may comprise means for performing the method of the first aspect and any of the possible implementations of the first aspect.

In a fourth aspect, a terminal device is provided for performing any of the possible implementations of the second aspect and the second aspect The method in the way. Specifically, the terminal device may include a module that performs the method in any of the possible implementations of the second aspect and the second aspect.

In a fifth aspect, an access network device is provided, comprising a transceiver, a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the access network The apparatus performs the elements of the method of the first aspect and any one of the possible implementations of the first aspect.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

According to a sixth aspect, a terminal device includes a transceiver, a memory, and a processor, the memory being configured to store a computer program, the processor is configured to call and run the computer program from the memory, so that the terminal device performs the foregoing A unit of a method in any of the possible implementations of the second aspect and the second aspect.

Optionally, the processor is one or more, and the memory is one or more.

In a seventh aspect, a communication system is provided, comprising: one or more of the access network devices provided by the foregoing third aspect, and one or more terminal devices provided by the above fourth aspect, or comprising one or more of the foregoing fifth An access network device provided by the aspect and one or more terminal devices provided by the sixth aspect above.

In an eighth aspect, a chip is provided, the chip storing a computer program that, when the chip is run on a communication device, causes the communication device to perform the first aspect to the second aspect and the first aspect to the second aspect A method in any of the possible implementations.

A ninth aspect, a computer readable storage medium for storing a computer program, the computer program comprising the first aspect to the second aspect and the first aspect to the second aspect The instructions of the method.

In a tenth aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as a code, or an instruction) that, when executed, causes the computer to perform the first aspect to the first The method of any of the possible implementations of the second aspect and the second aspect.

DRAWINGS

1 is a schematic diagram of a communication system of a method and apparatus for channel sensing applicable to an embodiment of the present application;

2 is a schematic flowchart of a method for channel interception according to an embodiment of the present application;

3 is a schematic flowchart of a method for channel listening provided by another embodiment of the present application;

4 is a schematic flowchart of a method for channel sensing provided by another embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for channel sensing provided by another embodiment of the present application; FIG.

FIG. 6 is a schematic block diagram of an access network device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an access network device according to an embodiment of the present application;

FIG. 8 is a schematic block diagram of a terminal device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

It should be understood that the technical solution of the present application can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system and its evolved system (eg, Licensed Admission Access (LAA-LTE) system), Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), next-generation communication system (for example, fifth-generation (5G) system), multiple access systems Fusion system, or evolution system, etc. Among them, the 5G system can also be called the New Radio Access Technology (NR) system.

In order to facilitate the understanding of the embodiments of the present application, the communication system applicable to the embodiment of the present application will be described in detail first with reference to FIG. FIG. 1 illustrates a communication system 100 suitable for a method and apparatus for channel sensing in embodiments of the present application. As shown in FIG. 1, the communication system 100 can include at least access network devices 111-112 and terminal devices 121-124. Access network devices and terminal devices may be devices that support communication over unlicensed band resources. That is, the access network device and the terminal device can communicate using the unlicensed band resources.

Optionally, the access network device 111 may be an access network device in the cell #1, or the access network device 111 may serve the terminal device in the cell #1 (including, for example, the terminal device 121 and the terminal device 122). . The access network device 112 may be an access network device in the cell #2, or the access network device 112 may serve the terminal device in the cell #2 (including, for example, the terminal device 123 and the terminal device 124).

Here, it should be noted that the cell can be understood as a serving cell of the access network device, that is, an area within the coverage of the wireless network of the access network device. In the present application, the access network device 111 in the cell #1 and the access network device 112 in the cell #2 may be different access network devices, for example, a base station, that is, a cell #1 and a cell #2 It can be managed by different base stations. The access network device 111 in the cell #1 and the access network device 112 in the cell #2 may be different radio frequency processing units of the same base station, for example, a radio remote unit (RRU), that is, Cell #1 and cell #2 may be managed by the same base station, having the same baseband processing unit and intermediate frequency processing unit, but with different radio frequency processing units. This application does not specifically limit this.

In the communication system 100, the frequency band supported by the cell #1 may be the same as the frequency band supported by the cell #2, and the access network device 111 may be the same type of access network device as the access network device 112, and the access network device 111 may also be a different type of access network device than access network device 112. For example, the access network device 111 and the access network device 112 may each be a base station of the LTE system. Correspondingly, the terminal device 121 and the terminal device 122 and the terminal device 123 and the terminal device 124 may both be terminal devices of the LTE system; or The

access network device

111 or 112 may also be a wireless router of a Wireless Fidelity (Wi-Fi) system, a wireless repeater, or the like. This application does not limit this.

It should be understood that the access network device may include a device in the access network that communicates with the terminal over one or more sectors on the air interface or a chip that may be disposed on the device, including but not limited to: GSM system or CDMA. A Base Transceiver Station (BTS) in the system may also include a base station (NodeB) in the WCDMA system, an evolved base station (eNodeB or eNB or e-NodeB) in the LTE system and its evolved system, or a relay station, access Point or radio remote unit (RRU), and access network equipment in fifth generation (5G) communication systems (such as transmission point (TP), transmission reception point (TRP), base station, small Base station equipment, etc., access network equipment in future communication systems, access nodes in Wi-Fi systems, wireless relay nodes, Wireless backhaul nodes, etc.

It should also be understood that the terminal device may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, A wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal. Equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( A wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The application scenario in this application does not limit the application scenario. In the present application, the foregoing terminal device and a chip that can be disposed in the foregoing terminal device are collectively referred to as a terminal device.

It should also be understood that FIG. 1 exemplarily shows a plurality of access network devices and a plurality of terminal devices and cells corresponding to the plurality of access network devices and a plurality of terminal devices, but this should not constitute any limitation to the present application. . The communication system may include other numbers of access network devices and terminal devices, and may also include other numbers of terminal devices within the coverage of the same access network device, and more cells may be deployed in the communication system, or The communication system may also distinguish the service areas of the access network devices without using the cell. This embodiment of the present application does not limit this.

In order to facilitate the understanding of the embodiments of the present application, the following briefly introduces several concepts involved in the embodiments of the present application.

First, LAA-LTE system:

The carrier aggregation (CA) configuration and structure in the LTE system are used to configure carriers on the carrier-licensed band (for convenience of distinction and description, referred to as licensed carriers), and the licensed carrier is used as an auxiliary to use the unlicensed band. The upper carrier (for ease of distinction and description, referred to as the unlicensed carrier for short) communicates. That is to say, the communication device can use the licensed carrier as a primary component carrier (PCC) or a primary cell (PCell) by means of a CA, and the unlicensed carrier is used as a secondary component carrier (SCC). Or secondary cell (Secondary Cell, SCell). Therefore, the communication device can use the licensed carrier to inherit the traditional advantages of wireless communication in the LTE system, for example, in terms of mobility, security, quality of service, and simultaneous handling of multi-user scheduling, and can achieve network capacity offload by utilizing the unlicensed carrier. The purpose of this is to reduce the attachment of the licensed carrier.

In the LAA-LTE system, subframe type 3 is defined, and any subframe belonging to subframe type 3 may be an uplink subframe or a downlink subframe, or any subframe may be uplink or downlink. This introduces the mutual interference between the uplink transmission and the downlink transmission in the LAA-LTE system, that is, the signals received by the communication device come from the same direction and from different directions. It should be noted that the same direction may refer to the same uplink transmission or the same downlink transmission, and different directions may refer to both uplink transmission and downlink transmission.

Second, the license-free frequency band:

Simply put, an unlicensed band is a frequency segment that is not officially constrained. The unlicensed band is relative to the licensed band. The resource sharing in the unlicensed band is essentially a limitation on the use of specific spectrum, such as the transmission power and out-of-band leakage, to ensure that the basic coexistence requirements are met between multiple devices sharing the band. In the process, when the terminal device transmits a signal to the access network device in the cell through the channel of the unlicensed spectrum, it needs to obtain the channel usage right of the unlicensed spectrum, and follows the limitation of the transmission power and bandwidth of the resource usage on the unlicensed spectrum. Claim. It does not limit radio technology, operating companies and years of use, but does not guarantee the quality of its services. Operation The use of unlicensed band resources can achieve the purpose of network capacity diversion, but it is required to comply with the regulatory requirements of unlicensed band resources in different geographies and different spectrums. These requirements are usually designed to protect public systems such as radar, as well as to ensure that multiple systems do not cause harmful effects and fair coexistence with each other, including emission power limits, out-of-band leak indicators, indoor and outdoor use restrictions, and areas. There are also some additional coexistence strategies and so on. For example, each communication device can compete for the use of the unlicensed band by using a Listen Before Talk (LBT) mechanism.

Third, LBT:

Before the communication device transmits a signal (for example, a data signal) on a certain channel (for example, as the first channel), it may first detect whether the first channel is idle, that is, whether it is detected that the nearby communication device is occupying the first channel. Signal, this detection process can be referred to as Clear Channel Assessment (CCA). If the first channel is detected to be idle for a period of time, the communication device can transmit a signal; if it is detected that the first channel is occupied, then the communication device is currently unable to transmit a signal on the first channel. The communication device can detect whether the channel is idle by means of signal detection, energy detection or the like. Specifically, if the communication device determines whether the channel is idle by signal detection, if the specific signal (for example, a preamble in the Wi-Fi system) is not detected, the channel is considered to be idle, and the unlicensed band can be utilized. Resource transmission signal. If the communication device determines whether the channel is idle through energy detection, if the received or detected energy (or power) is lower than a certain threshold, the channel is considered to be idle, and the channel can be utilized. Resource transmission signals in licensed bands. In areas where LBT is constrained, communication devices that require unlicensed bands are required to detect whether the channel is idle before using the unlicensed band for data transmission.

Fourth, channel listening:

The process by which a communication device receives a signal on a certain channel to detect whether the channel is idle (or, referred to as an idle channel assessment) may be referred to as channel listening.

Specifically, if the communication device determines whether the channel is idle by signal detection, if the specific signal is not detected, the channel is considered to be idle, or the signal transmission and reception of other communication devices is not heard; when a specific signal is detected In this case, it is considered that the channel is busy, or that the signal of other communication devices is received and received.

If the communication device determines whether the channel is idle through energy detection, if the received or detected energy is lower than a certain threshold, the channel is considered to be idle, or the signal of other communication device is not heard. When the received or detected energy is above a certain threshold, the channel is considered to be busy, or the signal of other communication devices is heard.

In the embodiment of the present application, the communication device may listen only in the sub-band, or may listen in the full bandwidth (or in the wideband listening). Therefore, it is possible for two or more communication devices that are geographically adjacent to each other to hear each other's signals.

Among them, broadband listening can be understood as the interception of communication equipment in broadband. Here, broadband can be understood as the total bandwidth that a communication device can use. For example, broadband can be system bandwidth, which is the available bandwidth defined in the system. It should be noted that the entire bandwidth may be all (ie, 100%) or part (ie, less than 100%) of the available bandwidth. If the entire bandwidth is part of the bandwidth of the available bandwidth, for example, 80%, the remaining unusable bandwidth may be distributed as guard bands on both sides of the available bandwidth, or may be discretely distributed in the available bandwidth. In other words, the bandwidth of the broadband can be continuous or discontinuous in the frequency domain.

For example, if the system bandwidth is 100M and the available bandwidth can be 100M, the bandwidth for wideband listening can be defined as 100M; the available bandwidth can also be 80M, and the bandwidth for wideband listening can be defined as 80M. If the available bandwidth is 80M, The remaining 20M in the bandwidth of the system can be distributed as guard bands on both sides of the available bandwidth. In this case, the bandwidth of the broadband can be continuous in the frequency domain; 10M can also be distributed as a guard band on the available bandwidth. On the other hand, the other 10M is discretely distributed in the available bandwidth, and at this time, the bandwidth of the broadband may be discontinuous in the frequency domain.

It should be understood that the bandwidth of the broadband enumerated above and the distribution in the frequency domain are merely exemplary for convenience of understanding, and should not be construed as limiting the present application. The definition of the broadband is not limited in this application.

Subband snooping can be understood as the interception of the communication device in the subband. Here, a subband can be understood as a subset of a wide band, that is, a subband is part or all of a wide band. Moreover, the bandwidth of the subbands may be continuous or discontinuous in the frequency domain. This application does not limit this.

For example, in the communication system shown in FIG. 1, it is assumed that the access network device 111 simultaneously transmits downlink signals to the terminal device 121 and the terminal device 122, and when the access network device 111 transmits signals to the terminal device 121 and the terminal device 122, respectively. The frequency domain resources used may be mutually orthogonal. If the terminal device 121 is listening on the broadband, it is possible to detect the downlink signal sent by the access network device 111 to the terminal device 122. Similarly, if the terminal device 122 is listening on the broadband, it is also possible to detect the access network device. 111 a downlink signal transmitted to the terminal device 121. In addition, if the access network device 112 is simultaneously transmitting downlink signals to the terminal device 123 and the terminal device 124, the terminal device 121 and the terminal device 122 may also simultaneously detect the access network device 112 to the terminal device 123 and the terminal device 124. The downlink signal sent. In other words, if the communication device is listening on the broadband, communication between any two communication devices may be heard by other communication devices.

Correspondingly, if the communication device is only listening in the sub-band, referring to the communication system shown in FIG. 1, it is assumed that the access network device 111 simultaneously transmits downlink signals to the terminal device 121 and the terminal device 122, and the access network The frequency domain resources used when the device 111 sends signals to the terminal device 121 and the terminal device 122 respectively may be orthogonal to each other; the access network device 112 simultaneously transmits downlink signals to the terminal device 123 and the terminal device 124, and the access network device The frequency domain resources used when transmitting signals to the terminal device 123 and the terminal device 124, respectively, are orthogonal to each other. The terminal device 121 or the terminal device 122 may detect the downlink signal sent by the access network device 112 to the terminal device 123 and the terminal device 124, and the terminal device 121 and the terminal device 122 may not hear each other; The terminal device 123 or the terminal device 124 may detect the downlink signal sent by the access network device 111 to the terminal device 111 and the terminal device 112, and the terminal device 123 and the terminal device 124 may not hear each other. In other words, if the communication device is only listening on the sub-band, the communication devices in the same cell may not be able to hear each other.

In some communication systems, any subframe may be either an uplink subframe or a downlink subframe, such as subframe type 3 in the LAA-LTE system described above. Therefore, there may be interference between uplink and downlink signals between two or more communication devices that are geographically adjacent.

Referring again to the communication system shown in FIG. 1, if the access network device 111, the terminal device 121, and the terminal device 122 are respectively listening in the sub-band, the transmission direction of the signal that may be received may be as shown in the following table:

That is, if the communication device (including the access network device and the terminal device) does not perform channel listening in the LBT mode, the access network device 111 in the cell #1 transmits the downlink signal to the terminal device 121 or the terminal device 122. In the process, or when the terminal device 121 or the terminal device 122 sends an uplink signal to the access network device, it may be interfered by the uplink and downlink transmissions of the neighboring cell (for example, the cell #2).

It should be understood that Table 1 only shows a list of signals that the communication device may receive in the cell #1 for the communication device in the case of sub-band listening in the case of sub-band listening, but this should not constitute any of the application. It is defined that if the communication device is listening in wideband, the communication device in cell #1 may receive signals from upper and lower transmissions of more communication devices. For the sake of brevity, we will not list them one by one here.

If the communication device uses the energy detection method to determine whether the channel is idle, it may further determine whether the energy of the received signal is greater than or equal to a preset energy detection threshold, thereby determining whether the channel is idle.

It should be noted that the terminal device may perform sub-band interception or broadband interception during channel interception. If the terminal device performs subband listening, in the same cell, if the resource occupation of each terminal device can be different in at least one dimension, for example, it can be distinguished by code division depluxing (CDD). Multiple terminal devices in the same cell. In this case, any two terminal devices in the same cell that are simultaneously transmitting data with the access network device may not interfere with each other; if the terminal device performs wideband interception, the same cell and the access network device simultaneously Multiple terminal devices that perform data transmission may interfere with each other. In the case of large interference, data reception performance may be degraded, and even the access network device or some terminal devices may not receive data correctly. However, it can be understood that only two cells are exemplarily drawn in FIG. 1. If there are more cells adjacent to cell #1 in the communication system, cell #1 may also receive more from the same time. Uplink and downlink signals of multiple cells.

5. Exposing nodes and hidden nodes:

The specific process by which the communication device determines whether the channel is idle by means of energy detection has been described above. However, in some scenarios, the channel listening result determined by the method of determining the channel is idle by the preset energy detection threshold may not be accurate.

For example, assume that the access network device 111 in FIG. 1 is transmitting a downlink signal to the terminal device 121 (referred to as signal #1 for ease of distinction and description), and the access network device 112 is intended to send a downlink to the terminal device 124. Signal (recorded as signal #2 for ease of distinction and explanation). Since the access network device 111 and the access network device 112 can be regarded as line-of-sight transmission, the path loss of the signal #1 transmitted by the access network device 111 to the access network device 112 is small, and the received power is high, which may be greater than Preset energy detection threshold. Therefore, the access network device 112 can hear the signal #1 of the access network device 111, and then considers that the channel is busy and cannot send the signal #2 to the terminal device 124.

However, in fact, since the terminal device 124 is relatively far from the access network device 111 (or the cell #1), the path loss when the signal #1 arrives at the terminal device 124 may be large, and the received power is low. If the access network device 112 sends a signal #2 to the terminal device 124, the signal #2 may be properly demodulated by the terminal device 124. For example, since the received power of the received interference signal (ie, signal #1) is low, it can be ignored, and the terminal device 124 receives the signal to interference plus noise ratio (SINR) of the signal #2. ) may be higher. In this case, the access network device 112 suspends the originally transmittable signal, so that the resource usage rate is lowered, the user cannot receive the signal in time, and the network performance and user experience are degraded. In the present application, the access network device 112 and the terminal device 121 may be referred to as exposed nodes.

For another example, assume that the access network device 111 in FIG. 1 is transmitting a downlink signal to the terminal device 121 (eg, a letter) No. #1), and the terminal device 124 is about to send an uplink signal to the access network device 112 (recorded as signal #3 for ease of distinction and description). Since the distance between the terminal device 124 and the access network device 111 is large, the path loss transmitted by the signal #1 transmitted by the access network device 111 to the terminal device 124 is large, and the received power is small, which may be less than a preset energy detection threshold. Therefore, if the terminal device 124 does not hear the signal #1 of the access network device 111, the channel is considered to be idle, and the access network device 112 can transmit the signal #3.

However, in fact, since the access network device 111 and the access network device 112 are line-of-sight transmissions, the signal #1 transmitted by the access network device 111 is transmitted to the access network device 112 with a small path loss and a high received power. . If the access network device 112 simultaneously receives the signal #3 transmitted by the terminal device 124, the signal #3 may not be correctly demodulated. For example, due to the higher received power of the interference signal (ie, signal #1), the SINR of the access network device 112 receiving the signal #3 may be lower. In this case, the terminal device 124 transmits a signal that should not be transmitted, so that the reception quality of the signal is degraded, the network performance is degraded, and the user experience is degraded. In the present application, the access network device 111 and the terminal device 124 may be referred to as hidden nodes.

It should be noted that since the height of the access network device is generally high, the obstacle is small, and the transmission between the two adjacent access network devices can be regarded as the line-of-sight transmission. The signal transmission path loss between the two communication devices transmitted by the line of sight is small, and the received signal quality is good. However, it should be understood that the access network device 111 and the access network device 112 in the present application are not limited to the case of line-of-sight transmission. For transmissions between communication devices that have higher shelf heights, fewer obstacles, and lower mobility, the path loss can be considered smaller and the signal reception quality is higher. In contrast, there are many obstacles between the terminal devices, and the mobility is high. The transmission between the terminal devices and the transmission between the terminal devices and the access network devices can be regarded as non-line-of-sight transmission in most cases. . The signal transmission path loss between the two communication devices having the above characteristics is large, and the received signal quality is poor. For example, the signal transmission path loss between the terminal device 121 and the access network device 112 in the present application is large.

In view of this, the present application provides a channel listening method, which can determine the power detection threshold according to the type of the received signal, which is beneficial to improve the accuracy of channel sensing, thereby improving the performance of the communication system.

Here, it should be particularly noted that power can be understood as energy per unit time. In other words, energy can be understood as consumption in a certain period of time, and power can be understood as consumption per unit time. Therefore, the method of energy detection and The method of power detection can be substantially the same. In the embodiments shown below, the various embodiments provided by the present application are described in connection with the power detection threshold, but it should be understood that this should not be construed as limiting the application. Those skilled in the art can modify or replace the power detection threshold according to the relationship between power and energy to obtain an energy detection threshold, and perform idle channel estimation according to the energy detection threshold. Therefore, the technical solution for performing the idle channel estimation according to the energy detection threshold should also fall within the protection scope of the present application. Hereinafter, the description of the same or similar cases will be omitted for the sake of brevity.

It should be understood that, in the present application, the first to the twelfth are only for facilitating distinguishing different objects, for example, distinguishing different access network devices, different terminal devices, different cells, different signals, different signal types, Different power detection thresholds, different thresholds, different offsets, different conditions, etc., should not be construed as limiting the application.

It should be noted that, in the present application, in order to distinguish the signals transmitted in the uplink and downlink, the downlink transmission signal is recorded as the first type signal, and the uplink transmission signal is recorded as the second type signal. For different sender devices, the signals transmitted in the same direction and the signals transmitted in the opposite direction are different. For example, for an access network device (for example, the first access network device in the following embodiment), the signal sent by the access network is a downlink signal, and therefore, the signal transmitted in the same direction (or simply the same direction signal) may be downlink. Signal, that is, the first type of signal, the signal transmitted in the opposite direction (or simply called the anisotropic signal) can It is the uplink signal, which is the second type of signal. For a terminal device (for example, the first terminal device in the following embodiment), the signal sent by the terminal device is an uplink signal, and therefore, the signal transmitted in the same direction may be an uplink signal, that is, the second type of signal, which is transmitted in the opposite direction. The signal can be a downlink signal, that is, a first type of signal.

Hereinafter, a method and apparatus for channel sensing provided by the present application will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic flowchart of a method 200 for channel interception provided by an embodiment of the present application. Specifically, the method 200 illustrated in FIG. 2 may be applied to a LAA-LTE system, and the method 200 may be referred to as an access network device in the LAA-LTE system (referred to as a first access for ease of distinction and description) Network device) execution. It should be understood that the first access network device may be any one of the LAA-LTE systems, for example, the first access network device may be the access network device in the communication system 100 shown in FIG. 111 or access network device 112.

It is assumed that the first access network device is the access network device 111 in the communication system 100 shown in FIG. 1. If the access network device 111 wants to send a signal to the terminal device (for example, the terminal device 121), the access network device 111 needs to perform idle channel estimation first, and then send a signal according to the idle channel evaluation result.

As shown in FIG. 2, the method 200 can include steps 210 through 250. The method 200 is described in detail below.

In step 210, the first access network device receives a signal on the unlicensed band resource.

That is, the first access network device can receive signals from access network devices and/or terminal devices in the communication system on the unlicensed band resources. Specifically, the signal received by the first access network device may include: at least one access network device from the first access network device (for the purpose of distinguishing and interpreting, the second access is recorded) The first type of signal of the network device, the second type of signal from at least one terminal device. In other words, the first access network device can receive downlink signals from at least one other access network device, and/or uplink signals from at least one terminal device. In addition, the first access network device may also receive a noise signal.

That is, the first access network device may receive the first type of signal and the noise signal on the unlicensed band resource, may also receive the second type of signal and the noise signal, and may also receive the first type of signal, The second type of signal and noise signal.

Taking the communication system 100 shown in FIG. 1 as an example, the access network device 111 may only receive the downlink signal from the access network device 112, or may only receive the uplink signal from the terminal device 123, and may also receive the incoming signal. The downlink signal of the network access device 112 and the uplink signal from the terminal device 123 and the terminal device 124. It should be understood that the first access network device and the second access network device are relatively the same, and the communication system 100 shown in FIG. 1 is taken as an example. If the first access network device is the access network device 111, the second The access network device can include an access network device 112. If the first access network device is the access network device 112, the second access network device may include the access network device 111. It will be understood that although not shown in FIG. 1, the second access network device may also include other access network devices. The application does not limit the number of second access network devices and the number of terminal devices.

In addition, the first access network device may also receive signals from different systems. Here, the heterogeneous system can be understood as a system different from LAA-LTE. For example, a Wi-Fi system. Since the first access network cannot determine whether the signal is an uplink signal or a downlink signal, in order to ensure the accuracy of channel sensing, the signal from the different system may be determined as a signal transmitted in the opposite direction.

Optionally, in the embodiment of the present application, the second type of signal further includes a signal from a different system.

It should be understood that determining a signal from a different system as an anisotropic signal is only one possible implementation, and the present application does not preclude the possibility of other processing of signals from different systems, for example, ignoring signals from different systems. And this The application also does not exclude that in the future technology, the first access network device can determine that the signal from the different system is an uplink signal or a downlink signal, in which case the first access network device can be from a different system. The downlink signal is determined to be the first type of signal, and the uplink signal from the different system is determined as the second type of signal.

In step 220, the first access network device determines a first power detection threshold according to a signal type of the received signal.

Specifically, the first power detection threshold can be understood as a parameter for determining whether the channel is idle. In this embodiment of the present application, the first access network device may determine the first power detection threshold based on a signal type of the received signal. In other words, the first access network device can adjust the first power detection threshold according to the signal type of the received signal.

Optionally, the method 200 further includes: Step 230, the first access network device determines a signal type of the received signal according to the received common signal. The common signal includes at least one of the following: an uplink reference signal, a downlink reference signal, a downlink synchronization signal, and a synchronization signal block.

In particular, a common signal can be understood as a signal that is indispensable in the communication process. By way of example and not limitation, the access network device may periodically send synchronization signals, such as a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Synchronization Signal Block (Synchronization Signal Block). SSB) and so on. The communication device may perform channel measurement by using a reference signal before transmitting the data signal, for example, a Channel State Information Reference Signal (CSI-RS), an uplink CSI-RS, or the like. The communication device can simultaneously transmit a reference signal when transmitting a data signal, for example, a Demodulation Reference Signal (DMRS).

The first access network device may determine whether the received public signal is an uplink signal or a downlink signal according to a priori information, for example, a sequence characteristic of the signal, an occupied time-frequency resource or a transmission period, and the received public signal. A possible implementation manner is that the first access network device can acquire sequence characteristics of various possible common signals in advance, perform blind detection based on various sequence characteristics, and detect a common signal from a certain communication device. When the sequence is determined, it can be determined whether the common signal is an uplink signal or a downlink signal according to a sequence matching the common signal, thereby determining whether the received signal from the same communication device is an uplink signal or a downlink signal, that is, It is determined whether the received signal is the first type of signal or the second type of signal.

In the embodiment of the present application, the method for determining, by the first access network device, the first power detection threshold according to the signal type of the received signal includes at least the following two types:

Method 1: The first access network device may determine a first initial power detection threshold in advance, and then determine the first power detection threshold according to a signal type of the received signal and the first initial power detection threshold.

Method 2: The communication system may pre-define (eg, define a protocol) a plurality of power detection thresholds, where the plurality of power detection thresholds are pre-configured, and then according to the signal type of the received signal The first power detection threshold is determined in the power detection thresholds.

Specific implementations of step 220 in different situations will be described in detail below in conjunction with specific embodiments.

In step 240, the first access network device performs an idle channel assessment according to the first power detection threshold.

Specifically, the first access network device may determine whether the channel is currently busy or idle according to the relationship between the total received power of the signal and the first power detection threshold in step 210. For example, when the total received power of the signal is greater than or equal to the first power detection threshold, the channel is considered to be in a busy state; when the total received power of the signal is less than the first power detection threshold, the channel is considered to be in an idle state.

Optionally, after step 240, the method 200 further includes: step 250, the first access network device sends a signal according to the idle channel evaluation result.

Specifically, the first access network device may suspend sending a signal when it is determined that the channel is busy, and optionally, the first access network device may resume signal transmission until the channel is detected to be idle. The first access network device can also use the channel to transmit a signal if it is determined that the channel is idle.

It should be understood that the steps performed by the first access network device after determining the idle channel evaluation result may be the same as the prior art, and a detailed description of the specific content thereof is omitted herein for the sake of brevity.

Based on the foregoing technical solution, the first access network device may determine the first power detection threshold according to the signal type of the received signal, and the value of the first power detection threshold is determined by considering interference that may be caused by different signal types. Different from the signal type of the received signal, the evaluation result is more accurate than the prior art using the fixed power detection threshold for the idle channel estimation, that is, the channel sensing accuracy is improved, so that the The probability that an access network device transmits a signal also differs depending on the type of the signal of the received signal. Therefore, it is advantageous to improve the data utilization performance of the resource utilization, thereby contributing to improving the performance of the communication system.

Further, according to the foregoing analysis content, for the first access network device, if the received signal is mainly from other access network devices, that is, the same direction signal, the first access network device mainly performs the same direction. Channel listening. Since the probability of the hidden node and the exposed node is low due to the same channel interception, the interference of the first access network device under the same channel interception is small, so that the energy detection threshold can be further improved, thereby improving the access wireless channel. The probability. Conversely, if the signal received by the first access network device is mainly from the terminal device, that is, the anisotropic signal, the first access network device mainly performs the isolating channel interception. Since the probability of the hidden node and the exposed node is slightly higher due to the heterogeneous channel interception, the interference of the first access network device under the heterogeneous channel interception may be greatly interfered, thereby further reducing the energy detection threshold, thereby reducing the The interference of the network device.

The above method 1 and method 2 will be described in detail below with reference to specific embodiments.

method one,

In method one, the first access network device may predetermine a first initial power detection threshold.

Specifically, the first initial power detection threshold may be predefined, for example, a protocol definition, or may be determined by the first access network device.

Optionally, the method 200 further includes: the first access network device determining, according to the transmit power information and the carrier bandwidth information, a first initial power detection threshold.

The transmit power information includes: actual transmit power (or transmit power, output power) or maximum transmit power of the first access network device on the unlicensed band resource, where the carrier bandwidth information includes: the first connection The actual transmission bandwidth or maximum transmission bandwidth of the network access device on the unlicensed band resources.

Specifically, the actual transmit power may be the power used by the first access network device to send one or more signals on the unlicensed band resource, where the one or more signals are that the first access network device is ready to send. And for an untransmitted signal, the power used to transmit the one or more signals is the power that the first access network device is prepared to use to transmit the one or more signals. Correspondingly, the actual transmission bandwidth may be the bandwidth of the frequency domain resource used by the first access network device to transmit the one or more signals on the unlicensed band resource, and the frequency used to transmit the one or more signals. The domain resource is a frequency domain resource that is pre-scheduled by the first access network device for transmitting the one or more signals.

The maximum transmit power and the maximum transmit bandwidth can be understood as the upper limit of the power and bandwidth that the access network device can use.

As a possible implementation manner, the first access network device may determine a first initial power threshold according to the following formula:

Where T is the first initial power detection threshold, T _max =10·log ₁₀ (F·BW), B, E, F, T _A , and P _H are preset values, F is a real number, and BW is a carrier bandwidth. The actual transmission bandwidth or the maximum transmission bandwidth may be the above, and the P _TX is the actual transmission power or the maximum transmission power.

For example, B can be -72dBm; E can be 20MHz; in data transmission, T _A can be 10dB, in demodulation reference signal transmission, T _A can be 5dB; P _H can be 23dBm; F can be 3.16228 × 10 ^-8 mW/MHz.

It should be understood that the above-listed formulas and the values of the parameters in the formula are only one possible implementation manner, and should not be construed as limiting the present application. The present application does not exclude other determinations based on the transmission power information and the carrier bandwidth information. An initial power detection threshold is possible.

In the embodiment of the present application, the first initial power detection threshold may be understood as an initial value of a power detection threshold, and after determining the first initial power detection threshold, the first access network device may further perform the received signal according to the received signal. The type determines whether adjustment is needed based on the pre-obtained first initial power detection threshold, for example, increasing or decreasing to obtain a first power detection threshold. In other words, in the embodiment of the present application, the first power detection threshold may be different depending on the type of the received signal, and is not a fixed value.

After determining the first initial power detection threshold, the first access network device may determine the first power detection threshold according to the signal type of the received signal. The specific implementation of step 220 in different situations will be described in detail below with reference to specific embodiments.

Specifically, the signal type of the signal received by the first access network device may include at least one of the following three conditions:

Case 1: the first access network device only receives the first type of signal, or the first access network device only receives the first type of signal and the noise signal;

Case 2: the first access network device only receives the second type of signal, or the first access network device only receives the second type of signal and the noise signal;

Case 3: The first access network device receives the first type of signal and the second type of signal, or the first access network device receives the first type of signal, the second type of signal, and the noise signal.

Step 220 will be described in detail below in conjunction with the three cases listed above.

Situation 1,

If the first access network device only receives downlink signals (or downlink signals and noise signals) from other access network devices, but does not receive an uplink signal from the terminal device, the first power detection threshold may be directly determined. The first power detection threshold is greater than the first initial power detection threshold.

Further, the first access network device may also determine the first power detection threshold according to the received power of the first type of signal.

Optionally, step 220 specifically includes:

The first access network device determines a first power detection threshold according to a signal type of the received signal and a received power of each type of signal.

That is, the first access network device may determine the first power detection threshold according to the received power of the first type of signal when the received signal satisfies the first condition. Optionally, the first access network device may determine a first power detection threshold if the received power of the first type of signal meets the first preset condition, where the first power detection threshold is greater than the first initial power detection threshold. Or, the preset power detection threshold is increased.

The first preset condition may include at least one of the following:

Condition 1. The received power of the first type of signal is greater than or equal to a preset first threshold;

Condition 2: The ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset second threshold.

The total received power is the total power of the signal received by the first access network device. In case 1, the signal received by the first access network device may include a first type of signal from other access network devices, or a first type of signal and a noise signal. Therefore, in case 1, the total received power is the total power of the first type of signal received by the first access network device, or the first access network device receives the total power of the first type of signal and the noise signal.

The first access network device may determine a first preset condition in advance, for example, if the received power of the first type of signal is greater than or equal to a preset first threshold, determining that the first preset condition is met, determining the first power The detection threshold is greater than the first initial power detection threshold; or, if the ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset second threshold, it is considered that the first preset condition is met, and the first The power detection threshold is greater than the first initial power detection threshold; or the received power of the first type of signal is greater than or equal to a preset first threshold and the ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset In the case of the second threshold, it is considered that the first preset condition is met, and it is determined that the first power detection threshold is greater than the first initial power detection threshold. Correspondingly, if the received power of the first type of signal does not meet the first preset condition, the first initial power detection threshold is directly determined as the first power detection threshold, that is, the preset power detection threshold may be No adjustments are made.

In the implementation process, the first access network device may determine that the first preset condition is at least one of the foregoing enumerated items, and when the received signal satisfies the first case, directly according to whether the received power of the first type of signal is The first preset condition is met, and the first power detection threshold is determined.

Optionally, the first access network device determines the first power detection threshold according to the type of the received signal and the received power of each type of signal, and further includes:

The first access network device determines a first offset when the first type of signal satisfies the first preset condition, where the first offset is a positive number;

The first access network device determines a sum of the first initial power detection threshold and the first offset as a first power detection threshold.

Specifically, the first offset may be determined by at least one of the following:

Mode a: The first offset is predefined, for example, a protocol definition.

That is, the value of the offset may be predefined (eg, defined by the protocol), and the first access network device may directly use the predefined offset as the first offset.

In a mode b, the first access network device determines the preset multiple offsets.

Specifically, a plurality of candidate offsets may be predefined (eg, defined by a protocol), and the first access network device may traverse each offset by, for example, network training, according to network performance corresponding to the offset. For example, cell throughput, or user-aware throughput, converges to one or more offsets such that the cell throughput or user-aware throughput reaches a relatively optimal value, and the offset is directly determined as The first offset, or one of the plurality of offsets, is selected as the first offset.

Assuming that the first offset is ΔP ₁ , the first initial power detection threshold is P ₁ ⁰ , and the first power detection threshold is P ₁ , the first power detection threshold P ₁ can be calculated by: P ₁ =P ₁ ⁰ +ΔP ₁ .

It should be understood that, in the foregoing embodiment, the first access network device determines that the first power detection threshold is greater than a value of the first initial power threshold when the received signal satisfies the first one, so that the first The access network device performs the idle channel assessment more accurately, but this should not limit the application. The application does not exclude the possibility that the first access network device determines the first power detection threshold to be smaller than the value of the first initial power detection threshold when the received signal satisfies the situation 1. In this case, the device can still The first power detection threshold is determined according to P ₁ =P ₁ ⁰ +ΔP ₁ , except that the first offset ΔP ₁ is a negative number.

Case 2

If the first access network device only receives the uplink signal (or the uplink signal and the noise signal) from the terminal device, but does not receive the downlink signal from the other access network device, the first power detection threshold may be directly determined. The first power detection threshold is less than the first initial power detection threshold.

Further, the first access network device may also determine the first power detection threshold according to the received power of the second type of signal in case 2.

Optionally, step 220 specifically includes:

The first access network device determines a first power detection threshold according to the type of the received signal and the received power of each type of signal.

That is, when the received signal satisfies Case 2, the first access network device may determine the first power detection threshold according to the received power of the second type of signal. For example, the first access network device may determine that the first power detection threshold is smaller than the first initial power detection threshold, or the preset power detection threshold, if the received power of the second type of signal meets the second preset condition. Being lowered.

The second preset condition may include at least one of the following:

Condition 3: The received power of the second type of signal is greater than or equal to a preset third threshold;

Condition 4: The ratio of the received power of the second type of signal to the total received power is greater than or equal to a preset fourth threshold.

In case two, the signal received by the first access network device may include a second type of signal from the terminal device, or a second type of signal and a noise signal. Therefore, in case 2, the total received power is the total power of the first type of signal received by the first access network device, or the total power of the second type of signal and the noise signal is received by the first access network device.

The first access network device may determine a second preset condition in advance, for example, if the received power of the second type of signal is greater than or equal to a preset third threshold, determining that the second preset condition is met, determining the first power The detection threshold is smaller than the first initial power detection threshold; or, if the ratio of the received power of the second type signal to the total received power is greater than or equal to a preset fourth threshold, it is considered that the second preset condition is met, and the first The power detection threshold is smaller than the first initial power detection threshold; or, the received power of the second type of signal is greater than or equal to a preset third threshold, and the ratio of the received power of the second type of signal to the total received power is greater than or equal to a preset value. In the case of the fourth threshold, it is determined that the second preset condition is met, and the first power detection threshold is determined to be smaller than the first initial power detection threshold; correspondingly, if the received power of the second type of signal does not satisfy the second preset condition, The first initial power detection threshold is directly determined as the first power detection threshold, that is, the preset power detection threshold may not be adjusted.

In the implementation process, the first access network device may determine that the second preset condition is at least one of the foregoing enumerated items, and when the received signal satisfies the second case, directly meet the received power according to the second type of signal. The second preset condition determines a first power detection threshold.

The first access network device determines a second offset when the second type of signal satisfies the second preset condition, where the second offset is a positive number;

The first access network device determines a difference between the first initial power detection threshold and the second offset as a first power detection threshold.

Specifically, the second offset may also be determined by any one of the foregoing manners a and b, as follows:

Mode a: the second offset is predefined, for example, a protocol definition;

It should be understood that the specific processes of mode a and method b have been described in detail in case one, and a detailed description of the specific process is omitted here for the sake of brevity.

Assuming that the second offset is ΔP ₂ , the first power detection threshold P ₁ can be calculated by the following equation: P ₁ =P ₁ ⁰ -ΔP ₂ .

It should be understood that, in the foregoing embodiment, when the received signal satisfies Case 2, the first access network device determines that the first power detection threshold is less than a value of the first initial power threshold, so that the first The access network device performs the idle channel assessment more accurately, but this should not limit the application. The present application also does not exclude the possibility that the first access network device determines the first power detection threshold to be greater than the value of the first initial power detection threshold when the received signal satisfies case 2, in this case, The first power detection threshold is determined according to P ₁ =P ₁ ⁰ -ΔP ₂ , except that the second offset ΔP ₂ is a negative number.

It should also be understood that the first offset determined in case one and the second offset determined in case two may be uncorrelated, both of which may be preset or first. It is calculated by the access network device, and the value of the two offsets is not limited in this application. The value of the first offset and the value of the second offset may be the same or different.

It should be noted that there is no correlation between the first preset condition in case one and the second preset condition in case two. The first access network device may determine the corresponding two conditions as the first preset condition and the second preset condition, respectively. In one possible design, the condition 1 is determined as the first preset condition, and the condition is met. The third threshold is determined to be a second preset condition. The first threshold may be, for example, -60 dBm, and the third threshold may be, for example, -80 dBm. Alternatively, the first threshold and the third threshold may be the same value, for example, may be -80 dBm. In another possible design, the condition 2 is determined as the first preset condition, and the condition 4 is determined as the second preset condition, and the second threshold may be, for example, 60%, and the fourth threshold may be, for example, 80. %, or the second threshold and the fourth threshold may be the same value, for example, may be 80%; in yet another possible design, the condition 1 and the condition 2 are determined as the first preset condition, and the condition 3 and Condition 4 is determined as the second preset condition.

It should be understood that the specific contents of the first preset condition and the second preset condition and the specific values of the corresponding thresholds are merely exemplary, and should not be construed as limiting the present application. For example, The condition 1 is determined as the first preset condition, and the condition 3 and the condition 4 are determined as the second preset condition.

It should be noted that, if Condition 1 and Condition 2 are determined as the first preset condition, the received power of the first type of signal is considered to satisfy the first preset condition when both Condition 1 and Condition 2 are satisfied. It is considered that the first preset condition is not satisfied if only condition one or condition two is satisfied or both condition one and condition two are not satisfied. Correspondingly, if condition three and condition four are determined as the second preset condition, the received power of the second type of signal satisfies the condition three and the The case of the fourth item is considered to satisfy the second preset condition, and is considered to not satisfy the second preset condition if only the condition three or the condition four or the condition three and the condition four are not satisfied.

Further, after determining the first preset condition and the second preset condition, the first access network device may be fixed or may not be updated for a certain period of time, and according to the performance of the communication system during the period of time, The first preset condition and/or the second preset condition may be adjusted.

It should be understood that the values of the first threshold to the fourth threshold are not limited, and the specific values of the first threshold to the fourth threshold are not limited. It should also be understood that between the first threshold and the second threshold, between the third threshold and the fourth threshold, and between the first threshold, the second threshold and the third threshold, and the fourth threshold may be uncorrelated. The specific value can be adjusted according to actual needs.

Based on the foregoing method for determining the first power detection threshold described in the first case and the second case, the first access network device receives the signal of the first type, that is, receives the signal to be sent (ie, downlink). In the case of a signal having the same transmission direction (ie, a downlink signal), since the probability of the hidden node and the exposed node being low due to the same channel interception is low, the interference to the first access network device may be small, so A higher power detection threshold may be used, that is, the probability of the first access network device transmitting a signal is higher; in the case of receiving the second type of signal, that is, the opposite transmission direction is received when the received signal is to be transmitted. In the case of the signal (ie, the uplink signal), since the probability of the hidden node and the exposed node is slightly higher due to the isolating channel interception, the interference to the first access network device may be large, so a lower one may be adopted. The power detection threshold, that is, the probability that the first access network device transmits a signal is low.

In other words, the first access network device has higher tolerance to signals transmitted in the same direction, or the signals transmitted in the same direction may have less interference to the signals transmitted by the first access network device, so In the case that the signal transmitted in the same direction is received and the signal transmitted in the opposite direction is not received, a higher power detection threshold may be adopted; instead, the first access network device has a lower tolerance to the signal transmitted in the opposite direction. Or, the signal transmitted by the opposite direction may cause a large interference to the signal sent by the first access network device. Therefore, when receiving the signal transmitted in the opposite direction, a lower power detection threshold may be adopted. .

Therefore, the embodiment of the present application determines the first power detection threshold according to the signal type and the combined receiving power, and can adjust the power detection threshold according to the influence of different signal types on the signal receiving quality, thereby facilitating the channel recording accuracy. Advantageously, improving resource utilization and data receiving performance, and improving performance of the communication system; and determining, by the first access network device, an offset from the first initial power detection threshold according to the current situation, thereby determining A power detection threshold can take into account the difference in power detection thresholds between devices, and the determined first power detection threshold is also more reasonable.

It should be understood that Case 1 and Case 2 listed above are only two possible cases of signals received by the first access network device, and should not constitute any limitation on the present application, and should not constitute a suitable scenario of the above method. Preferably, the above method of determining the first power detection threshold is equally applicable to a scenario in which both the first type of signal and the second type of signal (ie, Case 3 shown below) are received. For example, if the operator only pays attention to the received power of the signal in a certain direction, for example, only the received power of the signal transmitted in the same direction or the received power of the signal transmitted in the opposite direction, the first access network device can still determine the first method by using the above method. A power detection threshold facilitates idle channel evaluation.

Certainly, in a case where the first access network device receives the first type of signal and the second type of signal at the same time, the method for determining the first power detection threshold is not limited to the above enumeration, and the first access network device may also be The first power detection threshold is determined by considering the received power of the first type signal and the second type signal. The specific method for determining the first power detection threshold in the case where the first access network device receives the first type signal and the second type signal simultaneously is described in detail below.

Case 3,

If the first access network device receives the first type of signal and the second type of signal at the same time, the first access network device may directly select a lower power detection threshold, for example, determine the first power detection threshold as A value less than or equal to the first initial power detection threshold.

The first access network device may also determine a first power detection threshold according to the received power of each type of signal.

Optionally, step 220 specifically includes:

That is, the first access network device can determine the first power detection threshold by combining the received power of the first type of signal and the received power of the second type of signal.

The specific manner for the first access network device to determine the first power detection threshold according to the received power of the first type of signal and the received power of the second type of signal includes the following:

Mode A: determining, when the received power of the first type of signal meets the first preset condition, and the received power of the second type of signal does not satisfy the second preset condition, where the first power detection threshold is greater than First initial power detection threshold;

Mode B: determining, when the received power of the second type of signal meets the second preset condition, and the received power of the first type of signal does not meet the first preset condition, where the first power detection threshold is less than First initial power detection threshold;

Mode C: determining a first power detection threshold, where the received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, where the first power detection threshold is Equal to the first initial power detection threshold;

Mode D: determining, when the received power of the first type of signal meets the first preset condition, and the received power of the second type of signal meets the second preset condition, where the first power detection threshold is less than or Equal to the first initial power detection threshold.

The first preset condition may be Condition 1 or Condition 2 listed above, or a combination of Condition 1 and Condition 2, and the second preset condition may be Condition 3, or Condition 4, or Condition 3 listed above. And the combination of condition four. However, it should be understood that the first preset condition and the second preset condition are not limited to the above enumeration. For example, the first preset condition may further include condition five: the received power of the first type of signal and the received power of the second type of signal. The ratio of the second preset condition may further include the condition 6: the ratio of the received power of the second type of signal to the received power of the first type of signal is greater than or equal to 1, or the first preset condition may also be conditional five The combination of at least one of Condition 1 and Condition 2 listed above, and the second predetermined condition may also be a combination of Condition 6 and at least one of Condition 3 and Condition 4 listed above.

The foregoing manners A to D illustrate specific methods for determining the first power detection threshold in different situations in which the received power of the first type of signals and the second type of signals received by the first access network device may be satisfied.

Optionally, mode A may further include the following steps:

When the received power of the first type of signal satisfies the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, determining a third offset, the third offset being a positive number;

The sum of the first initial power detection threshold and the third offset is determined as a first power detection threshold.

Assuming that the third offset is ΔP ₃ , the first power detection threshold P ₁ can be calculated by the following equation: P ₁ = P ₁ ⁰ + ΔP ₃ .

Optionally, mode B may further include the following steps:

When the received power of the second type of signal satisfies the second preset condition and the received power of the first type of signal does not satisfy the first preset condition, determining a fourth offset, the fourth offset being a positive number;

The difference between the first initial power detection threshold and the fourth offset is determined as a first power detection threshold.

Assuming that the fourth offset is ΔP ₄ , the first power detection threshold P ₁ can be calculated by the following equation: P ₁ = P ₁ ⁰ - ΔP ₄ .

Optionally, the mode D may further include the following steps:

When the received power of the first type of signal satisfies the first preset condition and the received power of the second type of signal satisfies the second preset condition, determining the first initial power detection threshold as the first power detection threshold; or

Determining a fifth offset, and determining a difference between the first initial power detection threshold and the fifth offset as a first power detection threshold, wherein the fifth offset is a positive number.

Assuming that the fifth offset is ΔP ₅ , the first power detection threshold P ₁ can be calculated by the following equation: P ₁ = P ₁ ⁰ - ΔP ₅ .

It should be understood that the above third offset to fifth offset may be determined by any one of the above manners a and b. The two specific implementations for determining the offset have been described in detail in Case 1. For the sake of brevity, a detailed description of the specific implementation is omitted herein.

It should also be understood that the third to fifth offsets listed above may be uncorrelated. The value of the three offsets is not limited in this application, and the values of the three offsets are not limited. Can be completely different, partially identical, or identical.

The method for determining the first power detection threshold based on the foregoing combination case 3, the first access network device can still determine the first power detection threshold according to the received power of each type of signal, and receive the multiple types of signals. When the received power of the same-direction signal accounts for a large proportion, a higher power detection threshold may be adopted, that is, the probability that the first access network device transmits a signal is higher; and the received power of the received anisotropic signal accounts for a greater proportion. In the case of a large ratio, a lower power detection threshold can be used, that is, the probability that the first access network device transmits a signal is low.

Therefore, by determining the power detection threshold according to the signal type and the combined receiving power, the power detection threshold can be adjusted according to the influence of different signal types on the signal receiving quality, thereby improving the accuracy of channel sensing and improving resource utilization. And data reception performance helps to improve the performance of the communication system. And determining, by the first access network device, an offset from the first initial power detection threshold according to the current situation, and determining a first power detection threshold, which may be determined by considering a difference in power detection thresholds between devices. The first power detection threshold is also more reasonable.

It should be understood that the specific process of step 220 is described in detail above in connection with case one to case three, but this should not constitute any limitation to the present application. The signal received by the first access network device is not limited to the foregoing three situations. For example, the first access network device may not receive the first type signal and the second type signal, but only receive the noise signal. In this case, the first access network device may directly determine the first initial power detection threshold as the first power detection threshold.

It should also be understood that, in the foregoing embodiment, the magnitude relationship between the first power detection threshold and the first initial power detection threshold in different situations of the signal received by the first access network is shown, but this application should not be applied to this application. Form any limit. The present application also does not exclude the possibility that the first power detection threshold is less than the value of the first initial power detection threshold when the first type of signal satisfies the first preset condition and the second type of signal does not satisfy the second preset condition. And determining, in the case that the second type of signal satisfies the second preset condition and the first type of signal does not satisfy the first preset condition, determining that the first power detection threshold is greater than a value of the first initial power detection threshold, Does not rule out that the first type of signal does not satisfy the first preset condition And determining that the first power detection threshold is greater than or equal to a value of the first initial power detection threshold if the second type of signal does not satisfy the second preset condition. In the above-described cases, the third offset, the fourth offset, and the fifth offset may be negative.

In other words, the present application does not exclude the use of a lower power detection threshold for idle channel estimation in the case of receiving an in-directional signal and a higher power detection threshold in the case of receiving an anisotropic signal. The possibility of idle channel evaluation.

The specific method of determining the first power detection threshold by the method 1 is described in detail above by combining various situations. The method 2 will be described in detail below in combination with the above several cases.

Method Two,

In the second method, the communication system may pre-define (eg, define a protocol) a plurality of candidate power detection thresholds, where the first access network device is pre-configured with the power detection thresholds of the multiple candidates, and then according to the received The signal type of the signal and the received power of each type of signal determine a first power detection threshold from the plurality of candidate power detection thresholds. Therefore, in the second method, the first initial power detection threshold may not be determined in advance.

For example, the power detection thresholds of the multiple candidates may include at least: a first candidate power detection threshold, a second candidate power detection threshold, and a third candidate power detection threshold, where the first candidate power detection threshold is greater than the second candidate power detection threshold The second candidate power detection threshold is greater than the third candidate power detection threshold.

Situation 1,

If the first access network device only receives downlink signals (or downlink signals and noise signals) from other access network devices, that is, the first type of signals (or the first type of signals and noise signals), but not Receiving an uplink signal (that is, a second type of signal) from the terminal device, that is, the received signal is a non-directional signal, the first access network device may determine from a plurality of candidate power detection thresholds that are configured in advance. The first power detection threshold. For example, the first candidate power detection threshold listed above may be determined as the first power detection threshold.

Optionally, step 220 specifically includes:

That is, the first access network device may determine the first power detection threshold according to the received power of the first type of signal when the received signal satisfies the first condition. Optionally, the first access network device may determine the first power detection threshold if the received power of the first type of signal meets the first preset condition. For example, the first access network device may determine the first candidate power detection threshold listed above as the first power detection threshold.

The first preset condition may include at least one of the following:

It should be understood that the specific content of the first preset condition in the second method may be the same as the specific content of the first preset condition of the first method. The specific content of the first preset condition has been described in detail above, and for brevity, it will not be described again here.

Case 2

If the first access network device only receives an uplink signal (or an uplink signal and a noise signal) from the terminal device No.), but the downlink signal from other access network devices is not received, that is, the received signal is an anisotropic signal, the first access network device may determine from a plurality of candidate power detection thresholds that are pre-configured. The first power detection threshold. For example, the third candidate power detection threshold listed above may be determined as the first power detection threshold.

Optionally, step 220 specifically includes:

That is, when the received signal satisfies Case 2, the first access network device may determine the first power detection threshold according to the received power of the second type of signal. For example, the first access network device may determine the first power detection threshold if the received power of the second type of signal satisfies the second preset condition. For example, the first access network device may determine the third candidate power detection threshold listed above as the first power detection threshold.

The second preset condition may include at least one of the following:

It should be understood that the specific content of the second preset condition in the second method may be the same as the specific content of the second preset condition of the first method. The specific content of the second preset condition has been described in detail above, and for brevity, it will not be described again here.

Case 3,

If the first access network device receives the first type of signal and the second type of signal at the same time, the first access network device may directly select a lower power detection threshold, for example, multiple candidates listed above. The third candidate power detection threshold in the power detection threshold is determined as a first power detection threshold.

Optionally, step 220 specifically includes:

Taking the multiple candidate power detection thresholds listed above as an example, the first access network device is connected according to the first type of signals. The specific methods for determining the first power detection threshold by the received power and the received power of the second type of signal include the following:

Mode E: determining, in the case that the received power of the first type of signal meets the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, determining the first candidate power detection threshold as the first power detection Threshold

Mode F: determining, in the case that the received power of the second type of signal meets the second preset condition and the received power of the first type of signal does not satisfy the first preset condition, determining the third candidate power detection threshold as the first power detection Threshold

Mode G: determining, in the case that the received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, determining the second candidate power detection threshold as the first power Detection threshold

Mode H: determining, in the case that the received power of the first type of signal meets the first preset condition and the received power of the second type of signal meets the second preset condition, determining the second candidate power detection threshold as the first power detection threshold .

It should be understood that the multiple candidate power detection thresholds listed above and the thresholds for different situations are merely illustrative for ease of understanding and should not be construed as limiting the application. The application does not limit the number of power detection thresholds of the multiple candidates. For example, the number of candidate power detection thresholds may be more or less. The first access network device may also determine, according to the method for determining the first power detection threshold, the detection threshold for the current situation from the more or less candidate power detection thresholds as the first power detection threshold. .

Therefore, the embodiment of the present application determines the first power detection threshold according to the signal type and the received power, and can adjust the power detection threshold according to the influence of different signal types on the signal receiving quality, thereby facilitating the channel recording accuracy. , which is beneficial to improving resource utilization and data receiving performance, and helps to improve performance of the communication system; and, by determining a first power detection threshold from a plurality of predefined candidate power detection thresholds, with respect to method one, The implementation process is simpler and more convenient, and the calculation amount of the first access network device is reduced.

FIG. 3 is a schematic flowchart of a method 800 for channel sensing provided by another embodiment of the present application from the perspective of device interaction. In particular, the method 800 illustrated in FIG. 3 can be applied to a LAA-LTE system, and the method 800 can be performed by an access network device in the LAA-LTE system. In this embodiment, the access network device for performing the method 800 may be the access network device #1, and the terminal device #1 may be distributed in the cell covered by the access network device #1. If the access network device #1 wants to send a signal to the terminal device #1, the access network device #1 may first perform an idle channel evaluation, and then send a signal according to the idle channel evaluation result.

It should be understood that, in this embodiment, the access network device #1 may correspond to the first access network device in the method 200 above, and the access network device #2 may correspond to the second access in the method 200 above. Network equipment.

As shown in FIG. 3, the method 800 can include steps 801 through 806. The method 800 is described in detail below.

In step 801, access network device #1 receives the first signal from access network device #2 on the unlicensed band resource.

In step 802, access network device #1 receives a second signal from terminal device #2 on the unlicensed band resource.

Specifically, the step 801 and the step 802 may correspond to the step 210 in the method 200. The specific process of the step 210 has been described in detail above. For brevity, no further details are provided herein.

It should be noted that the access network device #1 does not necessarily receive the first signal from the access network device #2 and the first signal from the terminal device #2 at the same time, that is, the access network device #1 It is possible to perform only one of steps 801 and 802. Moreover, in the figure, for convenience of understanding, two access network devices and two terminal devices are exemplarily drawn. In fact, the communication system may include other numbers of access network devices and terminal devices, and the access network. It is possible for device #1 to receive signals from more access network devices and from more terminal devices. This application does not limit this.

In step 803, the access network device #1 determines the signal type of the received signal.

The access network device #1 may not know the signal type of the received signal when receiving the signal from the access network device #2 and/or the terminal device #2, but the access network device #1 may be public according to The signal determines the type of signal of the received signal. Specifically, the step 803 may correspond to the step 230 in the method 200. The specific process of the step 230 has been described in detail above. For brevity, details are not described herein again.

In step 804, the access network device #1 determines a first power detection threshold based on the signal type of the received signal. Specifically, the step 804 may correspond to the step 220 in the method 200. The specific process of the step 220 has been described in detail in conjunction with various different situations and implementation manners. For brevity, details are not described herein again.

In step 805, access network device #1 performs an idle channel assessment based on the first power detection threshold.

Specifically, the step 805 may correspond to the step 240 in the method 200. The specific process of the step 240 has been described in detail above. For brevity, details are not described herein again.

In step 806, the access network device #1 transmits a third signal based on the idle channel evaluation result.

Specifically, the access network device #1 may transmit a third signal if the channel is idle according to the idle channel evaluation result, and suspend the transmission if the channel is busy. It should be understood that the process of transmitting the third signal to the terminal device #1 by the access network device #1 is only shown in the figure, but this should not constitute any limitation to the present application.

Step 806 may correspond to step 250 in the method 200. The specific process of the step 250 has been described in detail above. For brevity, no further details are provided herein.

It should be understood that the specific implementation process of the method 800 is similar to the specific implementation process of the method 200. For the sake of brevity, the corresponding content will not be described in detail herein.

FIG. 4 is a schematic flowchart of a method 300 for channel sensing provided by another embodiment of the present application. Specifically, the method 300 illustrated in FIG. 4 may be applied to a LAA-LTE system, and the method 300 may be performed by a terminal device (referred to as a first terminal device for convenience of distinction and description) in the LAA-LTE system. . It should be understood that the first terminal device may be any terminal device in the LAA-LTE system, for example, the first terminal device may be the terminal device 121 or the terminal device 124 in the foregoing communication system 100, or may be as shown in FIG. The terminal device 122 or the terminal device 123 in the communication system 100.

It is assumed that the first terminal device is the terminal device 121 in the communication system 100 shown in FIG. 1. If the terminal device 121 wants to send a signal to the access network device (for example, the access network device 111), the terminal device 121 needs to perform the first The idle channel is evaluated, and then the signal is transmitted according to the idle channel evaluation result.

As shown in FIG. 4, the method 300 can include steps 310 through 350. The method 300 is described in detail below.

In step 310, the first terminal device receives a signal on the unlicensed band resource.

That is, the first terminal device can receive signals from the access network device and/or the terminal device in the communication system on the unlicensed band resources. Specifically, the signal received by the first terminal device may include at least: a first type of signal from the at least one access network device, and at least one terminal device other than the first terminal device (for convenience of distinction and description, The second type of signal is recorded as the second terminal device. In other words, the first terminal device can receive downlink signals from at least one access network device, and/or uplink signals from at least one other terminal device. In addition, the first terminal device may also receive a noise signal.

That is, the first terminal device may receive the first type of signal and the noise signal on the unlicensed band resource, may also receive the second type of signal and the noise signal, and may also receive the first type of signal, and the second type. Signal and noise signals.

It should be understood that the first terminal device and the second terminal device are relatively the same. The communication system 100 shown in FIG. 1 is taken as an example. If the first terminal device is the terminal device 121, the second terminal device may include the terminal device 123. The terminal device 124 may also include a terminal device 122. If the first terminal device is the terminal device 124, the second terminal device may include the terminal device 121, the terminal device 122, and possibly the terminal device 123.

It can be understood that although not shown in FIG. 1, the second terminal device may also include other terminal devices. The application does not limit the number of access network devices and the number of second terminal devices.

In addition, the first terminal device may also receive signals from different systems. Here, the heterogeneous system can be understood as a system different from LAA-LTE. For example, a Wi-Fi system. Since the first terminal cannot determine whether the signal is an uplink signal or a downlink signal, in order to ensure the accuracy of channel sensing, the signal from the different system may be determined as a signal transmitted in the opposite direction.

Optionally, in the embodiment of the present application, the first type of signal further includes a signal from a different system.

It should be understood that determining a signal from a different system as an anisotropic signal is only one possible implementation, and the present application does not preclude the possibility of other processing of signals from different systems, for example, ignoring signals from different systems. Moreover, the present application does not exclude the possibility that the first terminal device can determine that the signal from the different system is an uplink signal or a downlink signal in the future technology. In this case, the first terminal device can downlink from the different system. The signal is determined to be the first type of signal, and the upstream signal from the different system is determined to be the second type of signal.

In step 320, the first terminal device determines a second power detection threshold according to the signal type of the received signal.

Specifically, the second power detection threshold can be understood as a parameter for determining whether the channel is idle. In this embodiment of the present application, the first terminal device may determine a second power detection threshold based on a signal type of the received signal. In other words, the first terminal device can adjust the second power detection threshold according to the signal type of the received signal.

Optionally, the method 300 further includes: Step 330: The first terminal device determines, according to the received common signal, a signal type of the received signal. The common signal includes at least one of the following: an uplink reference signal, a downlink reference signal, a downlink synchronization signal, and a synchronization signal block.

In particular, a common signal can be understood as a signal that is indispensable in the communication process. As an example and not a limitation, the end The end device can periodically transmit synchronization signals, such as PSS, SSS, SSB, and the like. The communication device may perform channel measurement by using a reference signal before transmitting the data signal, for example, a downlink CSI-RS, an uplink CSI-RS, and the like. The communication device can simultaneously transmit a reference signal when transmitting a data signal, for example, a DMRS or the like.

The first terminal device may determine whether the received public signal is an uplink signal or a downlink signal according to a priori information, for example, a sequence characteristic of the signal, an occupied time-frequency resource or a transmission period, and the like, and the received public signal. A possible implementation manner is that the first terminal device can acquire sequence characteristics of various possible common signals in advance, perform blind detection based on various sequence characteristics, and detect a sequence matching the common signal from a certain communication device. When it is determined, it can be determined whether the common signal is an uplink signal or a downlink signal according to a sequence matching the common signal, and further, whether the received signal from the same communication device is an uplink signal or a downlink signal, that is, the reception can be determined. Whether the signal is the first type of signal or the second type of signal.

In the embodiment of the present application, the method for determining, by the first terminal device, the first power detection threshold according to the signal type of the received signal includes at least the following two types:

Method 1: The first terminal device may obtain a second initial power detection threshold in advance, and then determine the second power detection threshold according to the signal type of the received signal and the second initial power detection threshold.

Method 2: The communication system may pre-define (eg, define a protocol) a plurality of power detection thresholds, and the second access network device pre-acquires the multiple power detection thresholds, and then according to the signal type of the received signal The second power detection threshold is determined in the power detection thresholds.

Specific implementations of step 320 in different situations will be described in detail below in conjunction with specific embodiments.

In step 340, the first terminal device performs idle channel estimation according to the second power detection threshold.

Specifically, the first terminal device may determine whether the channel is currently busy or idle according to the relationship between the total received power of the signal and the first power detection threshold in step 310. For example, when the total received power of the signal is greater than or equal to the second power detection threshold, the channel is considered to be in a busy state; when the total received power of the signal is less than the second power detection threshold, the channel is considered to be in an idle state.

Optionally, after step 340, the method 300 further includes: step 350, the first terminal device sends a signal according to the idle channel evaluation result.

Specifically, the first terminal device may suspend sending a signal if it is determined that the channel is busy, and optionally, the first terminal device may resume signal transmission until the channel is detected to be idle; the first The terminal device can also use the channel to transmit a signal if it is determined that the channel is idle.

It should be understood that the steps performed by the first terminal device after determining the idle channel evaluation result may be the same as the prior art, and a detailed description of the specific content thereof is omitted herein for the sake of brevity.

Further, according to the foregoing analysis content, for the first terminal device, if the received signal mainly comes from other terminal devices, that is, the same direction signal, the first terminal device mainly performs the same channel interception. Since the probability of the hidden node and the exposed node is low due to the same channel interception, the first terminal device is interfered by the same channel listening. The interference is small, so that the energy detection threshold can be further improved, thereby increasing the probability of accessing the wireless channel. Conversely, if the signal received by the first terminal device is mainly from the terminal device, that is, the outbound signal, the first terminal device mainly performs the anisotropic channel sensing. Since the probability of the hidden node and the exposed node is slightly higher due to the heterogeneous channel interception, the first terminal device may be subjected to greater interference when the heterogeneous channel is intercepted, thereby further reducing the energy detection threshold, thereby reducing the network. Equipment interference.

method one,

In the method 1, the method 300 further includes: the first terminal device acquiring a second initial power detection threshold.

Specifically, the second initial power detection threshold may be predefined, for example, a protocol definition, or may be determined by the first terminal device, and may be determined by the access network device and indicated to the first terminal device.

Optionally, the acquiring, by the first terminal device, the second initial power detection threshold includes:

The first terminal device determines a second initial power detection threshold according to the transmit power information and the carrier bandwidth information.

The transmit power information includes: actual transmit power (or transmit power, output power) or maximum transmit power of the first terminal device on the unlicensed band resource, where the carrier bandwidth information includes: the first terminal device is Actual transmit bandwidth or maximum transmit bandwidth on unlicensed band resources.

It should be understood that the specific content of the transmit power information and the carrier bandwidth information in the method 300 is similar to the specific content of the transmit power information and the carrier bandwidth in the method 200. The transmit power information and the carrier bandwidth have been described in detail in the method 200 above. For the sake of brevity, a detailed description of the specific contents thereof is omitted here.

It can be understood that any one of the actual transmit power, the maximum transmit power, the actual transmit bandwidth, and the maximum transmit bandwidth may be the same or different for different sender devices, which is not limited in this application. .

It should also be understood that the specific method and method for determining, by the first terminal device, the second initial power detection threshold according to the transmit power information and the carrier bandwidth information in the method 300, the first access network device determines the first according to the transmit power information and the carrier bandwidth information. The specific method of the initial power detection threshold is similar, and a detailed description of the specific content thereof is omitted here for the sake of brevity.

It can be understood that the second initial power detection threshold and the first initial power detection threshold may be uncorrelated, and the value of the second initial power detection threshold may be the same as or different from the value of the first initial power detection threshold. There is no limit to this.

The first terminal device receives first indication information from the access network device, where the first indication information indicates a second initial power detection threshold.

That is, the second initial power detection threshold may also be determined by the access network device and indicated to the first terminal device, and the access network device may also determine the second initial power detection according to the foregoing enumerated method or other methods. Threshold, this application does not limit this.

After determining the first initial power detection threshold, the first terminal device may determine the second power detection threshold according to the signal type of the received signal. The specific implementation of step 320 in different situations is described in detail below in conjunction with specific embodiments.

Specifically, the signal type of the signal received by the first terminal device may include at least one of the following three situations:

Case 1: the first terminal device only receives the first type of signal, or the first terminal device only receives the first type of signal and the noise signal;

Case 2: the first terminal device only receives the second type of signal, or the first terminal device only receives the second type of signal and the noise signal;

Case 3: The first terminal device receives the first type signal and the second type signal, or the first terminal device receives the first type signal, the second type signal and the noise signal.

Step 320 will be described in detail below in conjunction with the three cases listed above.

Situation 1,

If the first terminal device only receives the downlink signal (or the downlink signal and the noise signal) from the access network, and does not receive the uplink signal from the other terminal device, the second power detection threshold may be directly determined. The second power detection threshold is less than the second initial power detection threshold.

Further, the first terminal device may also determine a second power detection threshold according to the received power of the first type of signal.

Optionally, step 320 specifically includes:

The first terminal device determines a second power detection threshold according to a signal type of the received signal and a received power of each type of signal.

That is, when the received signal satisfies the first condition, the first terminal device may determine the second power detection threshold according to the received power of the first type of signal. Optionally, the first terminal device may determine a second power detection threshold when the received power of the first type of signal meets a third preset condition, where the second power detection threshold is smaller than a second initial power detection threshold, or Said that the preset power detection threshold is reduced.

The third preset condition may include at least one of the following:

Condition 7, the received power of the first type of signal is greater than or equal to a preset fifth threshold;

Condition 8: The ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset sixth threshold.

The total received power is the total power of the signal received by the first terminal device. In case 1, the signal received by the first terminal device may include a first type of signal from the access network device, or a first type of signal and a noise signal. Therefore, in case 1, the total received power is the total power of the first terminal device received by the first terminal device, or the first terminal device receives the total power of the first type of signal and the noise signal.

The first terminal device may determine a third preset condition in advance, for example, if the received power of the first type of signal is greater than or equal to a preset fifth threshold, determining that the third preset condition is met, determining the second power detection The threshold is smaller than the second initial power detection threshold; or, if the ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset sixth threshold, it is considered that the third preset condition is met, and the second power is determined. The detection threshold is smaller than the second initial power detection threshold; or, the received power of the first type of signal is greater than or equal to a preset fifth threshold, and the ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset number In the case of the six thresholds, it is considered that the third preset condition is met, and it is determined that the second power detection threshold is smaller than the second initial power detection threshold. Correspondingly, if the received power of the first type of signal does not meet the first preset condition, the second initial power detection threshold is directly determined as the second power detection threshold, that is, the preset power detection threshold may be No adjustments are made.

In the implementation process, the first terminal device may determine that the third preset condition is at least one of the foregoing enumerated items, and when the received signal satisfies the situation one, directly according to whether the received power of the first type signal satisfies the first The third preset condition determines a second power detection threshold.

Optionally, the first terminal device determines the second power detection threshold according to the type of the received signal and the received power of each type of signal, and further includes:

The first terminal device determines a sixth offset when the first type of signal satisfies a third preset condition, where the sixth offset is a positive number;

The first terminal device determines a difference between the second initial power detection threshold and the sixth offset as a second power detection threshold.

Specifically, the sixth offset may be determined by at least one of the following methods:

Mode a: the sixth offset is predefined, for example, a protocol definition;

Method b, the first terminal device is determined from a preset multiple offsets;

The mode c is determined by the first terminal device receiving an indication from the access network device.

The specific process of mode a and mode b may be the same as the specific process of mode a and mode b described above in connection with method 200. For the sake of brevity, a detailed description of the specific process is omitted herein.

In the method c, optionally, the method 300 further includes: the first terminal device receiving second indication information from the access network device, where the second indication information indicates a sixth offset.

For example, the first access network device may receive the power according to the signal currently received by the first terminal device (specifically, the signal of the main signal type received by the first terminal device), and the interference in a certain period of time. The fluctuation level obtains a value of the second power detection threshold, and the second power detection threshold is subtracted from the first initial power detection threshold to obtain an offset. Among them, the main signal type can be understood as the type of signal in which the received power accounts for a relatively large amount in the above two types of signals.

Assuming that the sixth offset is ΔP ₆ and the second initial power detection threshold is

The first power detection threshold is P ₂ , and the first power detection threshold P ₂ can be calculated by:

It should be understood that, in the foregoing embodiment, when the received signal satisfies the first condition, the first terminal device determines that the second power detection threshold is less than a value of the second initial power threshold, so that the first terminal device The idle channel evaluation is performed more accurately, but this should not be construed as limiting the application. The present application also does not exclude the possibility that the first terminal device determines the second power detection threshold to be greater than the value of the second initial power detection threshold when the received signal satisfies the condition one. In this case,

The first power detection threshold is determined, except that the sixth offset ΔP ₆ is a negative number.

Case 2

If the first terminal device only receives the uplink signal (or the uplink signal and the noise signal) from the other terminal device, but does not receive the downlink signal of the access network device, the second power detection threshold may be directly determined, the second The power detection threshold is greater than the second initial power detection threshold.

Further, the first terminal device may also determine the second power detection threshold according to the received power of the second type of signal in case 2.

Optionally, step 320 specifically includes:

The first terminal device determines a second power detection threshold according to the type of the received signal and the received power of each type of signal.

That is, when the received signal satisfies Case 2, the first terminal device may determine the second power detection threshold according to the received power of the second type of signal. For example, the first terminal device may determine that the second power detection threshold is greater than the second initial power detection threshold, or the preset power detection threshold is improved, if the received power of the second type of signal meets the fourth preset condition. .

The fourth preset condition may include at least one of the following:

Condition 9, the received power of the second type of signal is greater than or equal to a preset seventh threshold;

Condition 10: The ratio of the received power of the second type of signal to the total received power is greater than or equal to a preset eighth threshold.

In case two, the signal received by the first terminal device may include a second type of signal from other terminal devices, or a second type of signal and a noise signal. Therefore, in case 2, the total received power is the total power of the first terminal device receiving the second type of signal, or the first terminal device receives the total power of the second type of signal and the noise signal.

The first terminal device may determine a fourth preset condition in advance, for example, if the received power of the second type of signal is greater than or equal to a preset seventh threshold, determining that the fourth preset condition is met, and determining the second power detection threshold If the ratio of the received power of the second type of signal to the total received power is greater than or equal to the preset eighth threshold, the second predetermined condition is determined to be determined, and the second power detection is determined. The threshold is greater than the second initial power detection threshold; or, the received power of the second type of signal is greater than or equal to a preset seventh threshold, and the ratio of the received power of the second type of signal to the total received power is greater than or equal to the preset eighth In the case of the threshold, it is determined that the fourth preset condition is met, and the second power detection threshold is determined to be greater than the second initial power detection threshold; correspondingly, if the received power of the second type of signal does not satisfy the fourth preset condition, The second initial power detection threshold is determined as the second power detection threshold, that is, the preset power detection threshold may not be adjusted.

In the implementation process, the first terminal device may determine that the fourth preset condition is at least one of the foregoing enumerated items, and when the received signal satisfies the second case, directly meet the fourth according to the received power of the second type of signal. A preset condition determines a second power detection threshold.

The first terminal is configured to determine a seventh offset when the second type of signal satisfies the fourth preset condition, where the seventh offset is a positive number;

The first terminal device determines a sum of the second initial power detection threshold and the seventh offset as the second power detection threshold.

Specifically, the seventh offset may also be determined by any one of the foregoing manners a to c.

It should be understood that the specific implementation manner of determining the offset by mode a and mode b has been described in detail above in connection with method 200, and the specific implementation manner of determining the offset by mode c has been described in detail in conjunction with method 300. For the sake of brevity, a detailed description of this specific implementation is omitted here.

It should also be understood that the sixth offset determined in case one and the seventh offset determined in case two may be uncorrelated, and the two offsets may be preset or first. The value calculated by the terminal device is not limited, and the value of the sixth offset may be the same as or different from the value of the seventh offset.

It should be noted that there is no correlation between the third preset condition in case one and the fourth preset condition in case one. The first terminal device may determine the corresponding two conditions as the third preset condition and the fourth preset condition, respectively. In one possible design, the condition 7 is determined as the third preset condition, and the condition 9 is determined. For a fourth preset condition, the fifth threshold may be, for example, -80 dBm, and the seventh threshold may be, for example, -60 dBm, or the fifth threshold and the seventh threshold may be the same value, for example, may be -80 dBm; In another possible design, condition 8 is determined as a third preset condition, and condition 10 is determined as a fourth preset condition, and the sixth threshold may be, for example, 80%, and the eighth threshold may be, for example, 60%. Alternatively, the two thresholds and the eighth threshold may be the same value, for example, may be 80%; in yet another possible design, the condition seven and the condition eight are determined as the third preset condition, and the condition nine and the tenth condition are Determined as the fourth preset condition.

It should be understood that the specific contents of the third preset condition and the fourth preset condition and the specific values of the corresponding thresholds are merely exemplary descriptions, and should not be construed as limiting the present application. For example, The condition seven is determined as the third preset condition, and the condition nine and the tenth condition are determined as the fourth preset condition.

It should be noted that, if condition 7 and condition 8 are determined as the third preset condition, the received power of the first type of signal is considered to satisfy the third preset condition when both the condition 7 and the condition 8 are satisfied. It is considered that the third predetermined condition is not satisfied if only the condition seven or the condition eight or the condition seven and the condition eight are not satisfied. Correspondingly, if condition 9 and condition 10 are determined as the fourth preset condition, the received power of the second type of signal is considered to satisfy the fourth preset condition when both the condition 9 and the condition 10 are satisfied. It is considered that the fourth preset condition is not satisfied if only condition 9 or condition 10 or condition 9 and condition 10 are not satisfied.

Further, after determining the third preset condition and the fourth preset condition, the first terminal device may be fixed, may not be updated for a certain period of time, and adjust the third according to the performance of the communication system during the period of time. Preset conditions and / or fourth preset conditions.

It should be understood that the values of the fifth threshold to the eighth threshold are not limited, and the specific values of the fifth threshold to the eighth threshold are not limited. It should also be understood that between the fifth threshold and the sixth threshold, between the seventh threshold and the eighth threshold, and between the fifth threshold, the sixth threshold, the seventh threshold, and the eighth threshold may be uncorrelated. The specific value can be adjusted according to actual needs.

Based on the foregoing method for determining the second power detection threshold described in the first case and the second case, the first terminal device receives the first type of signal, that is, in the case of receiving the anisotropic signal, due to the anisotropic channel The probability of the hidden node and the exposed node is slightly higher, which may cause greater interference to the first terminal device. Therefore, a lower power detection threshold may be adopted, that is, the probability that the first terminal device sends a signal is lower; In the case of receiving the second type of signal, that is, in the case of receiving the same direction signal, since the probability of the hidden node and the exposed node being caused by the same channel channel listening is low, the interference may be caused to the first terminal device. Small, so a higher power detection threshold can be used, that is, the probability that the first terminal device transmits a signal is high.

In other words, the first terminal device has higher tolerance to the signal transmitted in the same direction, or the signal transmitted in the same direction may cause less interference to the signal sent by the first terminal device, and therefore, is received. In the case of the signal transmitted in the same direction without receiving the signal transmitted in the opposite direction, a higher power detection threshold may be adopted; on the contrary, the tolerance of the first terminal device to the signal transmitted in the opposite direction is lower, or different The interference to the transmitted signal to the signal transmitted by the first terminal device may be large, and therefore, in the case of receiving the signal transmitted in the opposite direction, a lower power detection threshold may be employed.

Therefore, the embodiment of the present application determines the first power detection threshold according to the signal type and the combined receiving power, and can adjust the power detection threshold according to the influence of different signal types on the signal receiving quality, thereby facilitating the channel recording accuracy. It is beneficial to improve resource utilization and data reception performance, and helps to improve the performance of the communication system; and the first terminal device determines the offset according to the current situation, and can take into account the difference in power detection thresholds between devices, which is determined. The first power detection threshold is also more reasonable.

It should be understood that Case 1 and Case 2 listed above are only two possible cases of signals received by the first terminal device, and should not constitute any limitation on the present application, and at the same time, the applicable scenarios of the above methods should not be limited. The above method of determining the second power detection threshold is equally applicable to the scenario in which the first type of signal and the second type of signal (i.e., Case 3 shown below) are simultaneously received. For example, if the operator only pays attention to the received power of the signal in a certain direction, for example, only Note the received power of the signal transmitted in the same direction or the received power of the signal transmitted in the opposite direction, and the first terminal device can still determine the second power detection threshold by using the above method to facilitate the idle channel estimation.

Certainly, in a case where the first terminal device receives the first type signal and the second type signal at the same time, the method for determining the second power detection threshold is not limited to the above enumeration, and the first terminal device may further consider the first The received power of the class-like signal and the second type of signal determines a second power detection threshold. The specific method for determining the second power detection threshold in the case where the first terminal device receives the first type signal and the second type signal simultaneously is described in detail below.

Case 3,

If the first terminal device receives the first type signal and the second type signal at the same time, the first terminal device may directly select a lower power detection threshold, for example, determine the second power detection threshold to be less than or equal to the first The value of the initial power detection threshold.

The first terminal device may also determine a second power detection threshold according to the received power of each type of signal.

Optionally, step 320 specifically includes:

That is, the first terminal device can determine the second power detection threshold by combining the received power of the first type of signal and the received power of the second type of signal.

The specific manner in which the first terminal device determines the second power detection threshold according to the received power of the first type of signal and the received power of the second type of signal includes the following:

Mode I: determining a second power detection threshold, where the received power of the first type of signal meets the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, where the second power detection threshold is less than a second initial power detection threshold;

Mode J: determining, when the received power of the second type of signal meets the fourth preset condition, and the received power of the first type of signal does not meet the third preset condition, where the second power detection threshold is greater than a second initial power detection threshold;

Mode K: determining a second power detection threshold, where the received power of the first type of signal does not satisfy the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, the second power detection threshold Equal to the second initial power detection threshold;

Mode L: determining, when the received power of the first type of signal meets the third preset condition, and the received power of the second type of signal meets the fourth preset condition, the second power detection threshold is less than or Equal to the second initial power detection threshold.

The third preset condition may be the condition seven listed above, or the condition eight, or the combination of the condition seven and the condition eight, and the fourth preset condition may be the condition nine listed above, or the condition ten, or the condition nine And the combination of condition ten. However, it should be understood that the third preset condition and the fourth preset condition are not limited to the above enumeration. For example, the third preset condition may further include condition 11: the received power of the first type of signal and the received power of the second type of signal. The ratio of the fourth preset condition may further include condition 12: the ratio of the received power of the second type of signal to the received power of the first type of signal is greater than 1, or the third preset condition may also be a condition 11 and the combination of at least one of Condition 7 and Condition 8 listed above, the fourth predetermined condition may also be a combination of Condition 12 and at least one of Condition 9 and Condition 10 listed above.

The foregoing method 1 to mode L enumerates a specific method for determining the second power detection threshold in different situations in which the received power of the first type signal and the second type signal received by the first terminal device may be satisfied.

Optionally, the method 1 may further include the following steps:

When the received power of the first type of signal satisfies the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, determining an eighth offset, the eighth offset being a positive number;

A difference between the second initial power detection threshold and the eighth offset is determined as a second power detection threshold.

Assuming that the eighth offset is ΔP ₈ , the second power detection threshold P ₂ can be calculated by:

Optionally, the method J may further include the following steps:

When the received power of the second type of signal satisfies the fourth preset condition and the received power of the first type of signal does not satisfy the third preset condition, determining a ninth offset, the ninth offset being a positive number;

A sum of the second initial power detection threshold and the ninth offset is determined as a second power detection threshold.

Assuming that the ninth offset is ΔP ₉ , the second power detection threshold P ₂ can be calculated by:

Optionally, the mode L may further include the following steps:

When the received power of the first type of signal satisfies the third preset condition and the received power of the second type of signal satisfies the fourth preset condition, determining the second initial power detection threshold as the second power detection threshold; or

Determining a tenth offset and determining a difference between the second initial power detection threshold and the tenth offset as a second power detection threshold, wherein the tenth offset is a positive number.

Assuming that the tenth offset is ΔP ₁₀ , the second power detection threshold P ₂ can be calculated by:

It should be understood that the above eighth to tenth offsets may be determined by any one of the above modes a to c. The specific implementation manner of determining the offset by the mode a and the mode b has been described in detail above in conjunction with the method 200, and the specific implementation manner of determining the offset by the mode c has been described in detail in the case of the method 300, for the sake of brevity. Detailed description of this specific implementation is omitted here.

It should also be understood that the eighth to tenth offsets listed above may be uncorrelated, and the value of the three offsets is not limited in the present application, and the values of the three offsets are not limited. Can be completely different, partially identical, or identical.

The method for determining the second power detection threshold based on the foregoing combination case 3, the first terminal device can still determine the second power detection threshold according to the received power of each type of signal when receiving the multiple types of signals, and receive the same When the received power of the signal accounts for a large proportion, a higher power detection threshold may be adopted, that is, the probability that the first terminal device transmits a signal is higher; and the received power of the received anisotropic signal accounts for a larger proportion. In the case, a lower power detection threshold can be used, that is, the probability that the first terminal device transmits a signal is low.

Therefore, by determining the power detection threshold according to the signal type and the combined receiving power, the power detection threshold can be adjusted according to the influence of different signal types on the signal receiving quality, thereby improving the accuracy of channel sensing and improving resource utilization. And data reception performance helps to improve the performance of the communication system.

It should be understood that the specific process of step 320 is described in detail above in connection with case one to case three, but this should not constitute any limitation to the present application. The signal received by the first terminal device is not limited to the above three cases. For example, the first terminal device may not receive the first type signal and the second type signal, but only receive the noise signal. In this case, The first terminal device may directly determine the second initial power detection threshold as the second power detection threshold.

It should also be understood that, in the foregoing embodiment, the magnitude relationship between the second power detection threshold and the second initial power detection threshold in different situations of the signal received by the first terminal is shown, but this should not constitute any limited. Ben Shen It is also not excluded that the second power detection threshold is greater than the value of the second initial power detection threshold when the first type of signal satisfies the third preset condition and the second type of signal does not satisfy the fourth preset condition. It is also not excluded that the second power detection threshold is determined to be less than the value of the second initial power detection threshold if the second type of signal satisfies the fourth preset condition and the first type of signal does not satisfy the third preset condition, nor It is excluded that the second power detection threshold is determined to be greater than or equal to the value of the second initial power detection threshold if the first type of signal does not satisfy the third preset condition and the second type of signal does not satisfy the fourth preset condition. In the above-described cases, the eighth offset, the ninth offset, and the tenth offset may be negative numbers.

The specific method of determining the second power detection threshold by the method 1 is described in detail above by combining various situations. The method 2 will be described in detail below in combination with the above several cases.

Method Two,

In the second method, the communication system may pre-define (eg, define a protocol) a plurality of candidate power detection thresholds, and the first terminal device may acquire the power detection thresholds of the multiple candidates in advance. Optionally, the power detection thresholds of the multiple candidates are pre-configured in the first terminal device. Or, optionally, the first terminal device receives the third indication information from the access network device, where the third indication information carries the power detection thresholds of the multiple candidates.

Thereafter, the first terminal device may determine a second power detection threshold from the power detection thresholds of the multiple candidates according to the signal type of the received signal and the received power of each type of signal. Therefore, in the second method, the second initial power detection threshold may not be determined in advance.

For example, the power detection thresholds of the multiple candidates may include at least a fourth candidate power detection threshold, a fifth candidate power detection threshold, and a sixth candidate power detection threshold, where the fourth candidate power detection threshold is greater than the fifth candidate power detection threshold. The fifth candidate power detection threshold is greater than the sixth candidate power detection threshold.

Situation 1,

If the first terminal device only receives downlink signals (or downlink signals and noise signals) from other terminal devices, that is, the first type of signals (or the first type of signals and the noise signals), but does not receive the terminal from the terminal. The uplink signal of the device (that is, the second type of signal), that is, the received signal is an anisotropic signal, the first terminal device may determine a second power detection threshold from a plurality of candidate power detection thresholds that are configured in advance. For example, the sixth candidate power detection threshold listed above may be determined as the second power detection threshold.

Further, the first terminal device may also determine the second power detection threshold according to the received power of the first type of signal.

Optionally, step 320 specifically includes:

That is, when the received signal satisfies the first condition, the first terminal device may determine the second power detection threshold according to the received power of the first type of signal. Optionally, the first terminal device may determine the second power detection threshold if the received power of the first type of signal meets the third preset condition. For example, the first terminal device may determine the sixth candidate power detection threshold listed above as the second power detection threshold.

The third preset condition may include at least one of the following:

Condition 8. The ratio of the received power of the first type of signal to the total received power is greater than or equal to a preset sixth threshold.

It should be understood that the specific content of the third preset condition in the second method may be the same as the specific content of the third preset condition of the first method. The specific content of the third preset condition has been described in detail above, and for brevity, it will not be repeated here.

Case 2

If the first terminal device only receives the uplink signal (or the uplink signal and the noise signal) from the terminal device, but does not receive the downlink signal from the other terminal device, that is, the received signal is the same direction signal, then the The first terminal device may determine a second power detection threshold from among a plurality of candidate power detection thresholds that are configured in advance. For example, the fourth candidate power detection threshold listed above may be determined as the second power detection threshold.

Optionally, step 320 specifically includes:

That is, when the received signal satisfies Case 2, the first terminal device may determine the second power detection threshold according to the received power of the second type of signal. For example, the first terminal device may determine the second power detection threshold if the received power of the second type of signal satisfies the fourth preset condition. For example, the first terminal device may determine the fourth candidate power detection threshold listed above as the second power detection threshold.

The fourth preset condition may include at least one of the following:

Condition 9, the received power of the second type of signal is greater than or equal to a preset third threshold;

Condition 10: The ratio of the received power of the second type of signal to the total received power is greater than or equal to a preset fourth threshold.

It should be understood that the specific content of the fourth preset condition in the second method may be the same as the specific content of the fourth preset condition of the first method. The specific content of the fourth preset condition has been described in detail above, and for brevity, it will not be described again here.

It should be understood that Case 1 and Case 2 listed above are only two possible cases of signals received by the first terminal device, and should not constitute any limitation on the present application, and at the same time, the applicable scenarios of the above methods should not be limited. The above method of determining the second power detection threshold is equally applicable to the scenario in which the first type of signal and the second type of signal (i.e., Case 3 shown below) are simultaneously received. For example, if the operator only pays attention to the received power of the signal in a certain direction, for example, only the received power of the signal transmitted in the same direction or the received power of the signal transmitted in the opposite direction, the first terminal device can still determine the second power by using the above method. The threshold is detected to facilitate idle channel evaluation.

Case 3,

If the first terminal device receives the first type signal and the second type signal at the same time, the first terminal device may directly select a lower power detection threshold, for example, in the power detection thresholds of the multiple candidates listed above. The fourth candidate power detection threshold is determined as a first power detection threshold.

Optionally, step 320 specifically includes:

For example, the specific method for determining the second power detection threshold according to the received power of the first type of signal and the received power of the second type of signal includes the following:

Mode M: determining, in the case that the received power of the first type of signal meets the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, determining the sixth candidate power detection threshold as the second power detection Threshold

Mode N: determining, when the received power of the second type of signal meets the fourth preset condition and the received power of the first type of signal does not satisfy the third preset condition, determining the fourth candidate power detection threshold as the second power detection Threshold

Mode 0: determining, in the case that the received power of the first type of signal does not satisfy the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, determining the fifth candidate power detection threshold as the second power Detection threshold

Mode P: determining, when the received power of the first type of signal meets the third preset condition and the received power of the second type of signal meets the fourth preset condition, determining the fourth candidate power detection threshold as the second power detection threshold .

It should be understood that the multiple candidate power detection thresholds listed above and the thresholds for different situations are merely illustrative for ease of understanding and should not be construed as limiting the application. The application does not limit the number of power detection thresholds of the multiple candidates. For example, the number of candidate power detection thresholds may be more or less. The first terminal device may also determine a detection threshold for the current situation as a second power detection threshold from more or fewer candidate power detection thresholds based on the method for determining the second power detection threshold provided above.

Therefore, the embodiment of the present application determines the second power detection threshold according to the signal type and the received power, and can adjust the power detection threshold according to the influence of different signal types on the signal receiving quality, thereby facilitating the channel recording accuracy. , which is beneficial to improving resource utilization and data receiving performance, and helps to improve the performance of the communication system; and, by determining a second power detection threshold from a plurality of predefined power detection thresholds, with respect to method one, The implementation process is simpler and more convenient, and the calculation amount of the first terminal device is reduced.

FIG. 5 is a schematic flowchart of a method 900 for channel sensing provided by another embodiment of the present application from the perspective of device interaction. In particular, the method 900 illustrated in FIG. 5 can be applied to a LAA-LTE system, and the method 900 can be performed by a terminal device in the LAA-LTE system. In this embodiment, the terminal device for performing the method 900 may be the terminal device #1, and the access network device #1 may be deployed in the cell where the terminal device #1 is located. If the terminal device #1 wants to send a signal to the access network device #1, the terminal device #1 may perform the idle channel evaluation first, and then send a signal according to the idle channel evaluation result.

It should be understood that in the present embodiment, the terminal device #1 may correspond to the first terminal device in the method 300 above, and the terminal device #2 may correspond to the second terminal device in the method 300 above.

As shown in FIG. 5, the method 900 can include steps 901 through 906. The method 900 is described in detail below.

In step 901, terminal device #1 receives a fourth signal from access network device #2 on the unlicensed band resource.

In step 902, the terminal device #1 receives the fifth signal from the terminal device #2 on the unlicensed band resource.

Specifically, the step 901 and the step 902 may correspond to the step 310 in the method 300. The specific process of the step 310 has been described in detail above. For brevity, details are not described herein again.

It should be noted that the terminal device #1 does not necessarily receive the fourth signal from the access network device #2 and the first signal from the terminal device #2 at the same time, that is, the terminal device #1 may only perform the steps. 901 and any of the steps 902. Moreover, in the figure, for convenience of understanding, two access network devices and two terminal devices are exemplarily drawn. In fact, the communication system may include other numbers of terminal devices and terminal devices, and the terminal device #1 has It is possible to receive signals from more terminal devices and from more access network devices. This application does not limit this.

In step 903, the terminal device #1 determines the signal type of the received signal.

When receiving the signal from the access network device #2 and/or the terminal device #2, the terminal device #1 may not know the signal type of the received signal, but the terminal device #1 may determine to receive according to the public signal. The signal type of the signal. Specifically, step 903 may correspond to step 330 in method 300. The specific process of step 330 has been described in detail above, and is not described herein again for brevity.

In step 904, the terminal device #1 determines a second power detection threshold based on the signal type of the received signal. Specifically, the step 904 may correspond to the step 320 in the method 300. The specific process of the step 320 has been described in detail in conjunction with various different situations and implementations. For brevity, no further details are provided herein.

In step 905, terminal device #1 performs an idle channel assessment based on the second power detection threshold.

Specifically, step 905 may correspond to step 340 in method 300. The specific process of step 340 has been described in detail above, and is not described herein again for brevity.

In step 906, the terminal device #1 transmits a sixth signal based on the idle channel evaluation result.

Specifically, the terminal device #1 may transmit the sixth signal when the channel is idle according to the idle channel evaluation result, and suspend the transmission if the channel is busy. It should be understood that the process of transmitting the sixth signal by the terminal device #1 to the terminal device #1 is only shown in the figure, but this should not constitute any limitation to the present application.

Step 906 may correspond to step 350 in method 300. The specific process of step 350 has been described in detail above, and is not described herein again for brevity.

It should be understood that the specific implementation process of the method 900 is similar to the specific implementation process of the method 300. For the sake of brevity, the corresponding content will not be described in detail herein.

The first terminal device may determine the second power detection threshold according to the signal type of the received signal, and consider the interference that may be caused by different signal types, so that the value of the second power detection threshold is received by the first terminal device. The signal type of the received signal is different, and the evaluation result is more accurate than the prior art using the fixed power detection threshold for the idle channel evaluation, that is, the accuracy of the channel sensing is improved, so that the first terminal is The probability that the device sends a signal also varies with the type of signal of the received signal. Therefore, it is beneficial to improve resource utilization and data reception performance, thereby contributing to improving the performance of the communication system.

It should be understood that in various embodiments of the present application, the size of the sequence numbers of the above processes does not imply an order of execution. The order of execution of each process should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiments of the present application.

The method for channel sensing provided by the embodiment of the present application is described in detail above with reference to FIG. 2 to FIG. The access network device and the terminal device provided in the embodiments of the present application are described in detail below with reference to FIG. 6 to FIG.

FIG. 6 is a schematic block diagram of an access network device 400 provided by an embodiment of the present application. As shown in FIG. 6, the access network device 400 includes a transceiver module 410 and a processing module 420.

The transceiver module 410 is configured to receive a signal on the unlicensed band resource;

The processing module 420 is configured to determine a first power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of: at least one from the access network device a first type of signal of the access network device, a second type of signal from the at least one terminal device;

The processing module 420 is further configured to perform idle channel estimation according to the first power detection threshold.

Specifically, the access network device 400 may correspond to a first access network device in the method 200 of channel sounding according to an embodiment of the present application, and the access network device 400 may include a channel for performing channel sensing in FIG. A module of a method performed by a first access network device of method 200. Moreover, each module in the access network device 400 and the other operations and/or functions described above are respectively configured to implement the corresponding flow of the method 200 of channel sensing in FIG. Specifically, the transceiver module 410 can be used to perform step 210 and step 250 in the method 200. The processing module 420 can be used to perform steps 220 to 240 in the method 200. The specific process in which each module performs the corresponding steps is detailed in the method 200. For the sake of brevity, it will not be repeated here.

Alternatively, the access network device 400 can correspond to the access network device #1 in the method 800 of channel listening according to embodiments of the present application, which can include the channel for performing the channel sensing in FIG. A module of a method performed by access network device #1 of method 800. Moreover, each of the modules in the access network device 400 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 800 for channel sensing in FIG. Specifically, the transceiver module 410 is configured to perform step 801, step 802, and step 806 in the method 800. The processing module 420 is configured to perform step 803 to step 805 in the method 800, where the specific process of each module performing the corresponding step is The method 800 has been described in detail, and is not described herein for brevity.

FIG. 7 is a schematic structural diagram of an access network device 500 according to an embodiment of the present application. The access network device 500 can perform all the methods in the foregoing embodiments. For details, refer to the description in the foregoing embodiments. To avoid repetition, details are not described herein again. The access network device 500 shown in FIG. 7 includes a processor 510 and a transceiver 520. Optionally, the access network device 500 further includes a memory 530. The processor 510, the transceiver 520, and the memory 530 communicate with each other through an internal connection path for transferring control and/or data signals. The memory 530 is used to store a computer program, and the processor 510 is configured to be called from the memory 530. The computer program is run to control the transceiver 520 to send and receive signals.

The processor 510 and the memory 530 may be combined to form a processing device, and the processor 510 is configured to execute the program code stored in the memory 530 to implement the above functions. The memory 530 may also be integrated in the processor 510 or independent of the processor 510 when implemented.

The network device may further include an antenna 540, configured to send downlink data or downlink control signaling output by the transceiver 520 by using a wireless signal.

The transceiver 520 is configured to receive signals on the unlicensed band resources;

The processor 510 is configured to determine a first power detection threshold according to the received signal type of the signal, where The signal type of the signal includes at least one of: a first type of signal from at least one access network device other than the access network device, and a second type of signal from at least one terminal device;

The processor 510 is further configured to perform idle channel estimation according to the first power detection threshold.

Specifically, the access network device 500 may correspond to a first access network device in the method 200 of channel listening according to an embodiment of the present application, and the access network device 500 may include a channel for performing channel sensing in FIG. A module of a method performed by a first access network device of method 200. Moreover, each module in the access network device 500 and the other operations and/or functions described above are respectively configured to implement the corresponding flow of the method 200 of channel sensing in FIG. Specifically, the memory 530 is configured to store program code, such that when the program code is executed, the processor 510 is configured to control the transceiver 520 to perform step 210 in the method 200 through the antenna 540, and the processor 510 is further configured to execute the method. Steps 220 to 250 of 200, the specific process of each module performing the above-mentioned corresponding steps has been described in detail in the method 200. For brevity, no further details are provided herein.

Alternatively, the access network device 500 may correspond to the access network device #1 in the method 800 of channel listening according to an embodiment of the present application, and the access network device 500 may include a channel for performing channel sensing in FIG. A module of a method performed by access network device #1 of method 800. Moreover, each module in the access network device 500 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 800 for channel sensing in FIG. Specifically, the memory 530 is configured to store program code, such that when the program code is executed, the processor 510 controls the transceiver 520 to perform step 801, step 802, and step 806 in the method 800 through the antenna 540, where the processor 510 further The specific process for performing the foregoing steps in each module is described in detail in the method 800. For the sake of brevity, no further details are provided herein.

FIG. 8 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application. As shown in FIG. 8, the terminal device 60 includes a transceiver module 610 and a processing module 620.

The transceiver module 610 is configured to receive a signal on the unlicensed band resource.

The processing module 620 is configured to determine a second power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: a first type of signal from the at least one access network device, a second type of signal of at least one second terminal device other than the first terminal device;

The processing module 620 is further configured to perform idle channel estimation according to the second power detection threshold.

Specifically, the terminal device 600 may correspond to a first terminal device in the method 300 for channel sounding according to an embodiment of the present application, and the terminal device 600 may include the first method 300 for performing channel sensing in FIG. A module of the method performed by the terminal device. Moreover, each module in the terminal device 600 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 300 for channel sensing in FIG. Specifically, the transceiver module 610 can be used to perform step 310 and step 350 in the method 300. The processing module 620 can be used to perform steps 320 to 340 in the method 200. The specific process of each module performing the corresponding steps is detailed in the method 300. For the sake of brevity, it will not be repeated here.

Alternatively, the terminal device 600 may correspond to the terminal device #1 in the method 900 of channel listening according to an embodiment of the present application, and the terminal device 600 may include the terminal device # for performing the method 900 of channel sensing in FIG. 1 module of the method of execution. Moreover, each module in the terminal device 600 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 900 for channel sensing in FIG. Specifically, the transceiver module 610 can be used to perform step 901, step 902, and step 906 in the method 900. The processing module 620 can be used to perform steps 903 to 905 in the method 900. The specific process of each module performing the foregoing steps is in the method 300. Has been explained in detail, for the sake of simplicity, This will not be repeated here.

FIG. 9 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application. As shown in FIG. 9, the terminal device 700 includes a processor 701 and a transceiver 702. Optionally, the terminal device 700 further includes a memory 703. Wherein, the processor 702, the transceiver 702 and the memory 703 communicate with each other through an internal connection path for transmitting control and/or data signals, the memory 703 is for storing a computer program, and the processor 701 is used for the memory 703. The computer program is called and run to control the transceiver 702 to send and receive signals.

The processor 701 and the memory 703 may be combined to form a processing device, and the processor 701 is configured to execute the program code stored in the memory 703 to implement the above functions. In a specific implementation, the memory 703 may also be integrated in the processor 701 or independent of the processor 701. The terminal device 700 may further include an antenna 504, configured to send uplink data or uplink control signaling output by the transceiver 702 by using a wireless signal.

The transceiver 702 is configured to receive a signal on the unlicensed band resource;

The processor 701 is configured to determine, according to the received signal type of the signal, a second power detection threshold, where the signal type of the signal includes at least one of the following: a first type of signal from the at least one access network device, a second type of signal of at least one second terminal device other than the first terminal device;

The processor 701 is further configured to perform idle channel estimation according to the second power detection threshold.

Specifically, the terminal device 700 may correspond to a terminal device in the method 300 of channel sounding according to an embodiment of the present application, and the terminal device 700 may include a terminal device for performing the method 300 of channel sensing in FIG. The module of the method. Moreover, each module in the terminal device 700 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 300 for channel sensing in FIG. Specifically, the memory 703 is configured to store the program code, so that when the program code is executed, the processor 701 is configured to control the transceiver 702 to perform step 310 and step 350 in the method 300 through the antenna 704, where the processor 701 further uses Steps 320 through 340 in method 300 are performed. The specific process in which each module performs the above-mentioned corresponding steps has been described in detail in the method 300. For brevity, no further details are provided herein.

Alternatively, the terminal device 700 may correspond to the terminal device #1 in the method 900 of channel sounding according to an embodiment of the present application, and the terminal device 700 may include the terminal device # for performing the method 900 of channel sensing in FIG. 1 module of the method of execution. Moreover, each module in the terminal device 700 and the other operations and/or functions described above are respectively configured to implement the corresponding process of the method 900 for channel sensing in FIG. Specifically, the memory 703 is configured to store program code, such that when the program code is executed, the processor 701 is configured to control the transceiver 702 to perform step 901, step 902, and step 906 in the method 900 through the antenna 704, the processor The 701 is also used to perform the steps 903 to 905 in the method 900. The specific process of each module performing the foregoing steps is described in detail in the method 300. For brevity, no further details are provided herein.

The foregoing processor 701 can be used to perform the actions implemented by the terminal in the foregoing method embodiments, and the transceiver 702 can be used to perform the action of the terminal to transmit or transmit to the network device in the foregoing method embodiment. For details, please refer to the description in the previous method embodiments, and details are not described herein again.

The above processor 701 and memory 703 can be integrated into one processing device, and the processor 701 is configured to execute program code stored in the memory 703 to implement the above functions. In a specific implementation, the memory 703 can also be integrated in the processor 701.

The terminal device 700 described above may also include a power source 705 for providing power to various devices or circuits in the terminal.

In addition, in order to make the function of the terminal device more perfect, the terminal device 700 may further include one or more of an input unit 706, a display unit 707, an audio circuit 708, a camera 709, a sensor 710, and the like, the audio. The circuit may also include a speaker 7082, a microphone 7084, and the like.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, where the communication system includes one or more of the foregoing access network devices and one or more terminal devices.

It should be understood that embodiments of the present application may be applied to a processor or implemented by a processor. The processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a central processing unit (CPU), the processor may be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and an off-the-shelf Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory. The volatile memory can be a Random Access Memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM). SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchronous Connection Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The steps of the method for processing a communication interface failure disclosed in the embodiment of the present application may be directly implemented as completion of the hardware processor, or may be performed by a combination of hardware and software in the processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

It will be apparent to those skilled in the art that the system and apparatus described above are described for convenience and brevity of description. For the specific working process of the unit, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A channel interception method, comprising:

The first access network device receives the signal on the unlicensed band resource;

Determining, by the first access network device, a first power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: from the first access network device a first type of signal from at least one second access network device, a second type of signal from at least one terminal device;

The first access network device performs an idle channel assessment according to the first power detection threshold.
The method according to claim 1, wherein the first access network device determines the first power detection threshold according to the received signal type of the signal, including:

The first access network device determines the first power detection threshold according to the received signal type of the signal and the received power of each type of signal.
The method of claim 2, wherein the method further comprises:

Determining, by the first access network device, a first initial power detection threshold according to the transmit power information and the carrier bandwidth information, where the first initial power detection threshold is used to determine the first power detection threshold;

The transmit power information is the actual transmit power of the first access network device on the unlicensed band resource, or the maximum transmit power of the first access network device on the unlicensed band resource. ;

The carrier bandwidth information is an actual transmission bandwidth of the first access network device on the unlicensed band resource, or a maximum transmission bandwidth of the first access network device on the unlicensed band resource.
The method according to claim 3, wherein the first access network device determines the first power detection threshold according to a received signal type of the signal and a received power of each type of signal, including :

Determining, by the first access network device, the first power detection threshold, where the received power of the first type of signal meets a first preset condition, where the first power detection threshold is greater than the first initial Power detection threshold; or

Determining, by the first access network device, the first power detection threshold, where the received power of the second type of signal meets a second preset condition, where the first power detection threshold is smaller than the first initial Power detection threshold.
The method according to claim 3, wherein the first access network device determines the first power detection threshold according to a received signal type of the signal and a received power of each type of signal, including :

Determining, by the first access network device, that the received power of the first type of signal meets a first preset condition and the received power of the second type of signal does not satisfy a second preset condition a power detection threshold, where the first power detection threshold is greater than the first initial power detection threshold; or

Determining, by the first access network device, that the received power of the second type of signal meets the second preset condition and the received signal of the first type of signal does not satisfy the first preset condition The first power detection threshold, the first power detection threshold is smaller than the first initial power detection threshold.
The method according to claim 3, wherein the first access network device determines the first power detection threshold according to a received signal type of the signal and a received power of each type of signal, including :

Determining, in the case that the received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not satisfy the second preset condition, the first access network device determines the first A power detection threshold, the first power detection threshold being equal to the first initial power detection threshold.
The method according to any one of claims 4 to 6, wherein the first preset condition comprises:

The received power of the first type of signal is greater than or equal to a preset first threshold; and/or

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset second threshold;

The second preset condition includes:

The received power of the second type of signal is greater than or equal to a preset third threshold; and/or

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset fourth threshold.
A channel interception method, comprising:

The first terminal device receives the signal on the unlicensed band resource;

Determining, by the first terminal device, a second power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: a first type of signal from at least one access network device a second type of signal from at least one second terminal device other than the first terminal device;

The first terminal device performs idle channel estimation according to the second power detection threshold.
The method according to claim 8, wherein the determining, by the first terminal device, the second power detection threshold according to the received signal type of the signal comprises:

The first terminal device determines the second power detection threshold according to the received signal type of the signal and the received power of each type of signal.
The method of claim 9 wherein the method further comprises:

The first terminal device acquires a second initial power detection threshold, and the second initial power detection threshold is used to determine the second power detection threshold.
The method according to claim 10, wherein the determining, by the first terminal device, the second power detection threshold according to the received signal type of the signal and the received power of each type of signal comprises:

Determining, by the first terminal device, the second power detection threshold, where the received power of the first type of signal meets a third preset condition, where the second power detection threshold is smaller than the second initial power detection Threshold; or

The first terminal device determines the second power detection threshold when the received power of the second type of signal meets a fourth preset condition, where the second power detection threshold is greater than the second initial power detection Threshold.
The method according to claim 10, wherein the determining, by the first terminal device, the second power detection threshold according to the received signal type of the signal and the received power of each type of signal comprises:

Determining, by the first terminal device, that the received power of the first type of signal meets a third preset condition and the received power of the second type of signal does not satisfy a fourth preset condition, determining the second power detection. a threshold, the second power detection threshold is less than the second initial power detection threshold; or

Determining, by the first terminal device, that the received power of the second type of signal meets the fourth preset condition and the received power of the first type of signal does not satisfy the third preset condition a second power detection threshold, the second power detection threshold being greater than the second initial power detection threshold.
The method according to claim 10, wherein the determining, by the first terminal device, the second power detection threshold according to the received signal type of the signal and the received power of each type of signal comprises:

Determining, by the first terminal device, the second power when the received power of the first type of signal does not satisfy the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition Detection threshold, the second work The rate detection threshold is equal to the second initial power detection threshold.
The method according to any one of claims 11 to 13, wherein the third preset condition comprises:

The received power of the first type of signal is greater than or equal to a preset fifth threshold; and/or

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset sixth threshold;

The fourth preset condition includes:

The received power of the second type of signal is greater than or equal to a preset seventh threshold; and/or

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset eighth threshold.
An access network device, comprising:

a transceiver module for receiving signals on the unlicensed band resources;

a processing module, configured to determine, according to the received signal type of the signal, a first power detection threshold, where the signal type of the signal includes at least one of: at least one from the access network device a first type of signal of the access network device, a second type of signal from the at least one terminal device;

The processing module is further configured to perform idle channel estimation according to the first power detection threshold.
The access network device according to claim 15, wherein the processing module is specifically configured to determine the first power detection threshold according to a received signal type of the signal and a received power of each type of signal. .
The access network device according to claim 16, wherein the processing module is further configured to determine a first initial power detection threshold according to the transmit power information and the carrier bandwidth information, where the first initial power detection threshold is used for Determining the first power detection threshold;

The transmit power information is an actual transmit power of the access network device on the unlicensed band resource, or a maximum transmit power of the access network device on the unlicensed band resource;

The carrier bandwidth information is an actual transmission bandwidth of the access network device on the unlicensed band resource, or a maximum transmission bandwidth of the access network device on the unlicensed band resource.
The access network device according to claim 17, wherein the processing module is specifically configured to:

And determining, in the case that the received power of the first type of signal meets the first preset condition, the first power detection threshold, where the first power detection threshold is greater than the first initial power detection threshold; or

And determining, in the case that the received power of the second type of signal meets the second preset condition, the first power detection threshold, where the first power detection threshold is smaller than the first initial power detection threshold.
The access network device according to claim 17, wherein the processing module is specifically configured to:

Determining the first power detection threshold, where the received power of the first type of signal meets a first preset condition and the received power of the second type of signal does not satisfy a second preset condition, the first The power detection threshold is greater than the first initial power detection threshold; or

Determining the first power detection threshold if the received power of the second type of signal satisfies the second preset condition and the received signal of the first type of signal does not satisfy the first preset condition, The first power detection threshold is less than the first initial power detection threshold.
The access network device according to claim 17, wherein the processing module is specifically configured to:

The received power of the first type of signal does not satisfy the first preset condition and the received power of the second type of signal does not And determining, by the second preset condition, the first power detection threshold, where the first power detection threshold is equal to the first initial power detection threshold.
The access network device according to any one of claims 18 to 20, wherein the first preset condition comprises:

The received power of the first type of signal is greater than or equal to a preset first threshold; and/or

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset second threshold;

The second preset condition includes:

The received power of the second type of signal is greater than or equal to a preset third threshold; and/or

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset fourth threshold.
A terminal device, comprising:

a transceiver module for receiving signals on the unlicensed band resources;

a processing module, configured to determine a second power detection threshold according to the received signal type of the signal, where the signal type of the signal includes at least one of the following: a first type of signal from at least one access network device, a second type of signal from at least one terminal device other than the terminal device;

The processing module is further configured to perform idle channel estimation according to the second power detection threshold.
The terminal device according to claim 22, wherein the processing module is specifically configured to determine the second power detection threshold according to a signal type of the signal and a received power of each type of signal.
The terminal device according to claim 23, wherein the processing module is further configured to acquire a second initial power detection threshold, where the second initial power detection threshold is used to determine the second power detection threshold.
The terminal device according to claim 24, wherein the processing module is specifically configured to:

And determining, in the case that the received power of the first type of signal meets a third preset condition, the second power detection threshold, where the second power detection threshold is smaller than the second initial power detection threshold; or

And determining, in the case that the received power of the second type of signal meets the fourth preset condition, the second power detection threshold, where the second power detection threshold is greater than the second initial power detection threshold.
The terminal device according to claim 24, wherein the processing module is specifically configured to:

Determining the second power detection threshold, where the received power of the first type of signal satisfies a third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition The power detection threshold is less than the second initial power detection threshold; or

Determining the second power detection threshold if the received power of the second type of signal satisfies the fourth preset condition and the received power of the first type of signal does not satisfy the third preset condition, The second power detection threshold is greater than the second initial power detection threshold.
The terminal device according to claim 24, wherein the processing module is specifically configured to:

Determining the second power detection threshold if the received power of the first type of signal does not satisfy the third preset condition and the received power of the second type of signal does not satisfy the fourth preset condition, The second power detection threshold is equal to the second initial power detection threshold.
The terminal device according to any one of claims 25 to 27, wherein the third preset condition comprises:

The received power of the first type of signal is greater than or equal to a preset fifth threshold; and/or

The ratio of the received power of the first type of signal to the total received power of the signal is greater than or equal to a preset sixth threshold;

The fourth preset condition includes:

The received power of the second type of signal is greater than or equal to a preset seventh threshold; and/or

The ratio of the received power of the second type of signal to the total received power of the signal is greater than or equal to a preset eighth threshold.
A communication device, comprising:

a memory for storing a computer program;

A processor for executing a computer program stored in the memory to cause the apparatus to perform the method of any one of claims 1 to 14.
A computer readable storage medium, comprising a computer program, when executed on a computer, causing the computer to perform the method of any one of claims 1 to 14.