WO2020029872A1 - Method and apparatus for indicating channel occupation - Google Patents

Abstract

Provided in the present application are a method and an apparatus for indicating channel occupation, conducive to saving resources. The method comprises: a network device sends indication information comprising channel occupation information, the indication information comprising a group indicator corresponding to a terminal device group; by means of the group indicator, a terminal device in the terminal device group corresponding to the group indicator can be instructed to feed back channel occupation information; the terminal device in the terminal device group corresponding to the group indicator sends feedback information comprising the channel occupation information of the terminal device. On the basis of the present application, by means of grouping the terminal devices and introducing a group indicator, the resource costs required for notifying the terminal devices to feed back channel occupation can be reduced.

Description

Method and device for channel occupation indication

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on August 07, 2018, with application number 201810893178.1, and entitled "Method and Device for Channel Occupation Indication", the entire contents of which are incorporated herein by reference. Applying.

Technical field

The present application relates to the field of communications, and more particularly, to a method and apparatus for channel occupancy indication.

Background technique

The spectrum used by wireless communication systems is divided into two categories, licensed spectrum (unlicensed spectrum) and unlicensed spectrum (unlicensed spectrum). For commercial mobile communication systems, operators need to auction the authorized spectrum. After obtaining the authorization, they can use the corresponding spectrum to carry out mobile communication operations. Unlicensed spectrum does not need to be auctioned, and anyone can legally use these frequency bands, such as wireless-fidelity (WiFi) devices in the 2.4 GHz and 5 GHz frequency bands.

In the prior art, after a transmitting device contends for a channel, it sends a channel occupancy signal to other peripheral devices. The second channel occupancy signal indicates to other devices the transmission time that the transmitting device needs to occupy on the contended channel. Instruct the receiving device to feedback the channel occupation signal. For example, when the transmitting device is a network device and the receiving device is a terminal device, the terminal device is also included in the channel usage instruction information (CUI) or the new downlink control information (downlink control information (DCI)). The cell wireless network temporary identifier (C-RNTI) of the cell, or the DCI scrambled by the C-RNTI specific to the terminal device to notify the terminal device for feedback. This way of notifying the terminal device of feedback consumes more resources and thus costs too much.

Summary of the invention

The present application provides a method and apparatus for channel occupancy indication, which can reduce the resource cost required to notify the terminal device of the feedback channel occupation duration.

According to a first aspect, a communication method is provided. The method includes: a network device sends first instruction information, the first instruction information includes a group identifier of a terminal device group, and the first instruction information is used to indicate a terminal device feedback channel. Occupation information, wherein the terminal device is a terminal device in the terminal device group, and the network device receives feedback information from the terminal device, and the feedback information includes information on channel occupation of the terminal device. The foregoing channel occupancy information includes, for example, the channel occupancy duration, and / or information about the channel occupied by the transmitting end or the receiving end, and the like.

Based on the above technical solution, when the network device notifies the terminal device of feedback of channel occupation information, the terminal device can be grouped first, and the terminal device group corresponds to the group identifier one by one. Each terminal device group includes multiple terminal devices. Alternatively, when there is only one terminal device group, the group identifier may be a relative identifier of the terminal device in the entire terminal device group. When the terminal device is notified to feedback the channel occupation duration, the group identification can be based on the foregoing group identification, thereby avoiding the waste of resources caused by the need to identify each terminal device.

With reference to the first aspect, in some implementations of the first aspect, the first indication information further includes a relative identifier of the terminal device in the terminal device group, where the terminal device is the network device A determined terminal device that needs to feed back channel occupation information.

Based on the above technical solution, when the network device notifies the terminal device of feedback of channel occupation information, a representative terminal device may be selected for feedback. By selecting a representative terminal device to perform feedback on behalf of the terminal device group, the resource cost required to notify the terminal device of the feedback channel occupation time can be reduced.

With reference to the first aspect, in some implementations of the first aspect, before the network device receives feedback information from the terminal device, the method includes: the network device sends second instruction information, and the second instruction information includes A first threshold, wherein the second indication information is used to instruct the terminal device to determine whether to feedback information of channel occupation according to the first threshold.

Based on the above technical solution, after the terminal devices in the specified network device group receive the information that needs to be feedbacked, it can determine whether it needs to feedback the information of channel occupation based on the relative identifier and the first threshold. Through this selection mechanism, some terminal devices can be selected from the terminal device group to feed back channel occupation information on behalf of the terminal device group, thereby reducing waste of resources.

With reference to the first aspect, in some implementations of the first aspect, there is a corresponding relationship between the group identifier and the feedback resource; or, the position information of the group identifier in the first indication information and the feedback resource have Correspondence relationship; wherein the feedback resource includes resources used by the terminal device to feedback information occupied by a channel.

Based on the above technical solution, the resources used when the terminal equipment feeds back channel occupied information may be pre-configured. After receiving the indication information, the terminal device can determine the feedback resource according to the corresponding relationship between the relative identifier and the feedback sub-resource to which the terminal device belongs, thereby preventing multiple terminal devices in a terminal device group from preempting one channel at the same time. Status of feedback resources. Alternatively, when multiple terminal devices are divided into a group, the relative identifier may also be a relative identifier of the terminal device. When some terminal devices feedback, the feedback resources may be determined according to the corresponding relationship between the terminal device's relative identification and the feedback resource / feedback sub-resource.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information further includes information on channel occupation of the network device.

With reference to the first aspect, in some implementation manners of the first aspect, the channel occupancy information of the network device includes duration information of the channel occupancy, and / or, is used as information of the channel occupied by the transmitting end or receiving end.

With reference to the first aspect, in some implementation manners of the first aspect, the channel occupancy information of the terminal device includes duration information of channel occupancy, and / or, is used as information of a channel occupied by a transmitting end or a receiving end.

Based on the above technical solution, when the feedback information is sent and the sender's instruction is carried, the nodes heard around can not be limited to the channel occupation notification in the feedback information, and can continue to communicate. When the feedback information is sent with the receiver's indication, the surrounding nodes need to be limited by the channel occupancy notification in the feedback information, that is, it is necessary to prohibit the use of the channel within the indicated channel occupancy period. This can further improve communication performance.

With reference to the first aspect, in some implementations of the first aspect, the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels PDCCH.

With reference to the first aspect, in some implementations of the first aspect, before the network device sends the first instruction information, the network device includes third instruction information, and the third instruction information includes the group: The identifier, or the group identifier and the relative identifier, and the relative identifier is a relative identifier of the terminal device in the terminal device group.

Based on the above technical solution, after the network device groups the terminal devices, the network device may notify the terminal device of the group identification, or the group identification and the relative identification, or the relative identification of the terminal device, so that the terminal device knows the group to which it belongs and the group. Logo.

With reference to the first aspect, in some implementations of the first aspect, before the network device sends the first instruction information, the method includes: the network device grouping the terminal device to obtain the terminal device group, and the The terminal device group corresponds to the group identifier on a one-to-one basis.

With reference to the first aspect, in some implementations of the first aspect, any one of the second indication information and the third indication information is sent through radio resource control RRC signaling or media access control MAC layer signaling. Or, any one of the second indication information and the third indication information is sent through RRC signaling and is activated / deactivated by physical layer signaling or MAC layer signaling.

In a second aspect, a communication method is provided. The method includes: a terminal device receiving first instruction information from a network device, the first instruction information including a group identifier corresponding to a terminal device group, and the first instruction information is used For instructing the terminal device to feedback channel occupation information, wherein the terminal device is a terminal device in the terminal device group corresponding to the group identifier; the terminal device sends feedback information to the network device, and The feedback information includes information on channel occupation of the terminal device.

Based on the above technical solution, the terminal device may determine whether the terminal device group to which it belongs needs to feedback the information of channel occupation according to whether the group identifier has the identity of the terminal device group to which it belongs. Each terminal device corresponds to a group identifier, or when there is only one terminal device group, the group identifier may be an identifier of the terminal device in the entire terminal device group. Based on the above group identification, the terminal device can quickly determine whether to perform feedback, thereby improving communication performance. In addition, for a plurality of terminal devices, only a representative terminal device feedback is required, thereby saving resources.

With reference to the second aspect, in some implementations of the second aspect, the first indication information further includes a relative identifier of the terminal device in the terminal device group, where the terminal device is the network device A determined terminal device that needs to feed back channel occupation information.

With reference to the second aspect, in some implementations of the second aspect, before the terminal device sends feedback information to the network device, the method includes: the terminal device determines whether to send feedback to the network device according to a first threshold and the group identifier. Channel occupation information.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: determining, by the terminal device, a resource used for feedback of the information occupied by the channel according to a first correspondence relationship, where the first correspondence relationship is: The correspondence between the group identifier and the feedback resource, or the correspondence between the position information of the group identifier in the first indication information and the feedback resource, wherein the feedback resource includes the terminal device Resources used for feedback channel occupied information.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: determining, by the terminal device, a resource used for feedback of the information occupied by the channel according to a second correspondence relationship, where the second correspondence relationship is: The corresponding relationship between the relative identifier and the feedback sub-resource, or the corresponding relationship between the position information of the relative identifier in the first indication information and the feedback sub-resource, or the corresponding relationship between the relative identifier and the feedback resource, Or, the corresponding relationship between the position information of the relative identifier in the first indication information and the feedback sub-resource, wherein the relative identifier is a relative identifier of the terminal device in the terminal device group, and the feedback The resources include resources used by the terminal device to feedback information occupied by the channel, and the feedback sub-resources are resources used by the terminal device to feedback information occupied by the channel.

With reference to the second aspect, in some implementation manners of the second aspect, the first indication information further includes information on channel occupation of the network device.

With reference to the second aspect, in some implementation manners of the second aspect, the channel occupancy information of the terminal device includes duration information of the channel occupancy, and / or, is used as information of a channel occupied by a transmitting end or a receiving end.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels PDCCH.

According to a third aspect, a communication device is provided, including each module or unit for performing the first aspect and the method in any one of the possible implementation manners of the first aspect.

According to a fourth aspect, a communication device is provided, including a processor. The processor is coupled to the memory, and can be used to execute instructions in the memory to implement the foregoing first aspect and the method in any possible implementation manner of the first aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input / output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input / output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

In a fifth aspect, a communication device is provided, including each module or unit for performing the second aspect and the method in any one of the possible implementation manners of the second aspect.

According to a sixth aspect, a communication device is provided, including a processor. The processor is coupled to the memory and can be used to execute instructions in the memory to implement the second aspect and the method in any possible implementation manner of the second aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input / output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

According to a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the first aspect or the second aspect and any possible implementation manner of the first aspect or the second aspect Method.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. An input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and a signal output by the output circuit may be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and output The circuits may be the same circuit, which are used as input circuits and output circuits respectively at different times. The embodiments of the present application do not limit specific implementations of the processor and various circuits.

According to an eighth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the first aspect or the second aspect and any possible implementation manner of the first aspect or the second aspect Methods.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory is separately provided from the processor.

In the specific implementation process, the memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated on the same chip as the processor, or may be separately set in different On the chip, the embodiment of the present application does not limit the type of the memory and the way of setting the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from a processor, and receiving capability information may be a process of receiving input capability information by a processor. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and the receiver may be collectively referred to as a transceiver.

The processing device in the above eighth aspect may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented, the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

In a ninth aspect, a computer program product is provided. The computer program product includes a computer program (also referred to as code or instructions), and when the computer program is executed, causes a computer to execute the first aspect or the first aspect. The method in the second aspect and any one of the possible implementation manners in the first aspect or the second aspect.

According to a tenth aspect, a computer-readable medium is provided. The computer-readable medium stores a computer program (also referred to as a code or an instruction), which when executed on a computer, causes the computer to execute the first aspect or the first aspect. The method in the second aspect and any one of the possible implementation manners in the first aspect or the second aspect.

According to an eleventh aspect, a communication system is provided, including the foregoing network device and terminal device.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of a communication system applicable to a communication method according to an embodiment of the present application;

2 is a schematic diagram of an LBT listening mechanism applicable to an embodiment of the present application;

FIG. 3 is a schematic diagram of another LBT listening mechanism applicable to an embodiment of the present application; FIG.

4 is a schematic interaction diagram of a communication method according to an embodiment of the present application;

5 is a schematic diagram of grouping terminal devices applicable to a communication method according to an embodiment of the present application;

6 is a schematic diagram of a DCI format applicable to a communication method according to an embodiment of the present application;

7 is another schematic diagram of a DCI format applicable to a communication method according to an embodiment of the present application;

8 is another schematic diagram of a DCI format applicable to a communication method according to an embodiment of the present application;

9 is a schematic diagram of a correspondence relationship between a group identifier and a feedback resource applicable to an embodiment of the present application;

FIG. 10 is a schematic diagram of a position of a group identifier applicable to an embodiment of the present application; FIG.

11 is a schematic diagram of a correspondence relationship between a position of a group identifier and a feedback resource applicable to an embodiment of the present application;

FIG. 12 is a schematic diagram of a correspondence between a relative identifier and a feedback sub-resource of a terminal device applicable to an embodiment of the present application; FIG.

13 is a schematic diagram of a correspondence relationship between a position of a relative identifier and a feedback sub-resource of a terminal device applicable to an embodiment of the present application;

14 is a schematic diagram of a correspondence relationship between a relative identifier of a terminal device in the group and a feedback sub-resource suitable for an embodiment of the present application;

15 is a schematic diagram of a correspondence relationship between a position of a relative identifier in the group and a feedback sub-resource suitable for a terminal device applicable to an embodiment of the present application;

16 is a schematic flowchart of a communication method applicable to an embodiment of the present application;

17 is a schematic block diagram of a communication device according to an embodiment of the present application;

18 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of a network device according to an embodiment of the present application.

detailed description

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

The technical solutions in the embodiments of the present application can be applied to various communication systems, such as: a wireless local area network (WLAN) communication system, a global system of mobile communication (GSM) system, and a code division multiple access (code) system. division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency Frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile communication system (UMTS), global interconnected microwave access (worldwide interoperability for microwave access), WiMAX Communication systems, future 5th generation (5G) systems, or new radios (NR).

In order to facilitate understanding of the embodiments of the present application, a communication system shown in FIG. 1 is taken as an example to describe in detail a communication system applicable to the embodiments of the present application. FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. As shown, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in FIG. 1, and the wireless communication system 100 may further include at least one terminal device, such as the terminal devices 121 to 121 shown in FIG. Terminal equipment 123. Both network equipment and terminal equipment can be configured with multiple antennas, and network equipment and terminal equipment can use multi-antenna technology to communicate.

Optionally, the wireless communication system 100 may be an LTE communication system capable of operating in an unlicensed frequency band, such as a long-term evolution unlicensed (LTE-Unlicensed, LTE-U) system, or a new air interface capable of operating in an unlicensed frequency band. The communication system, such as a new radio-unlicensed (NR-U) system, may also be another communication system that operates in an unlicensed frequency band in the future. In addition, the wireless communication system may also include a WiFi network.

Optionally, the network device 111 may be a network device in a cell, or in other words, the network device 111 may serve a terminal device (for example, the terminal device 121) in the cell # 1. It should be noted that a cell can be understood as a serving cell of a network device, that is, an area within a coverage area of a wireless network of the network device.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiver function. The network equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC) ), Base transceiver station (BTS), home base station (for example, home NodeB, or home NodeB, HNB), baseband unit (BBU), wireless fidelity (Wireless Fidelity, WIFI) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., can also be 5G, such as, NR, gNB in the system, or transmission point (TRP or TP), one or a group of base stations (including multiple antenna panels) in the 5G system, or an antenna panel, or a network node constituting a gNB or a transmission point , Such as a baseband unit (BBU), or a distributed unit (DU).

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio frequency unit (radio unit, RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (RRC), packet data convergence layer protocol (PDCP) layer functions, and DU implements wireless chain Functions of radio control (RLC), media access control (MAC) and physical (PHY) layers. Because the information of the RRC layer will eventually become the information of the PHY layer, or transformed from the information of the PHY layer, under this architecture, higher-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU. , Or, sent by DU + CU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in an access network (RAN), or the CU can be divided into network equipment in a core network (CN), which is not limited in this application.

It should also be understood that the terminal equipment in the wireless communication system may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, User terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may be a mobile phone, a tablet, a computer with a wireless transmitting and receiving function, a virtual reality (VR) terminal device, or 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 ( wireless terminals in transportation, wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiment of the present application does not limit the application scenario.

It should be understood that FIG. 1 is only a simplified schematic diagram for ease of understanding. The communication system may further include other network devices or other terminal devices, which are not shown in FIG. 1.

As shown in the wireless communication system 100 shown in FIG. 1, the frequency spectrum used by the wireless communication system includes two types, a licensed spectrum and an unlicensed spectrum. Generally, carriers on the licensed spectrum are called licensed carriers, and carriers on the unlicensed spectrum are called unlicensed carriers. With the development of wireless communication technology, the amount of information transmitted in wireless communication networks is increasing. Preempting unlicensed spectrum to transmit information can increase the data throughput in wireless communication networks and better meet user needs. In a long-term evolved unlicensed spectrum (LAA-LTE) system, LAA-LTE nodes use channel resources through the principle of listen before talk (LBT), where LBT is A carrier sensing multiple access (CSMA) technology. In the LAA system, the LBT method is used to compete for the access channel, but the start time point of the channel occupation in this method is random, so the start time point of the signal appearing on the LAA-LTE carrier is also random.

In current LAA systems, LBT is usually based on energy detection (ED) to support the coexistence of different nodes and technologies. When the measured interference level exceeds a certain level, the node will simply backoff. The preamble detection-based mechanism in WiFi systems has more advantages. The transmission opportunity (TXOP) length is carried in the payload of the preamble, and the fallback depends on the preamble detection and demodulation / decoding of the payload.

Generally, after a transmitting device competes for a channel, it can send a channel occupancy signal to other peripheral devices. The channel occupancy signal indicates to other devices how long the transmitting device needs to occupy on the contended channel, thereby avoiding collision between other devices. Improve communication efficiency. Transmission or reception is possible within this time period.

The sending device may be a network device, for example, the network device 111 in the wireless communication system 100. Alternatively, the sending end device may also be a terminal device, for example, the terminal device 121, the terminal device 122, or the terminal device 123 in the wireless communication system 100. Specifically, if the LBT initiated by the network device is successful, it is determined that it can communicate with the terminal device. If the data is sent during the communication, the network device is the sending end device; if the data is received during the communication, the network device is Receiver device. If the LBT initiated by the terminal device is successful, it is determined that it can communicate with the network device. If the data is transmitted during the communication, the terminal device is the transmitting device; if the data is received during the communication, the network device is the receiving device.

In order to understand clearly, the following describes the general process after the transmitting device obtains the channel usage right.

The sender device sends a channel occupancy signal after the LBT succeeds, and the channel occupancy signal is used to indicate to other devices that the sender device will use the channel duration on the competition channel, and the duration is the channel occupation duration to be protected.

If the LBT initiated by the transmitting device is successful, the transmitting device obtains the channel usage right. The transmitting device occupies the channel within the channel occupation time. The channel occupation time may be configured for a network device, or specified by a standard, or pre-stored, etc., which is not limited in the embodiment of the present application. In other words, the transmitting device can transmit within the channel occupation time without being disturbed by other devices. The channel occupation time may be less than or equal to the maximum channel occupation time (MCOT), or may be TXOP.

In the following, "MCOT" is used as an example of the channel occupation duration.

The occupancy time to be protected indicated by the channel occupancy signal sent by the transmitting device may be less than or equal to MCOT. Within the occupied time of the channel to be protected, except for the sending end device itself or the receiving device indicated by the sending end device, other receiving devices may not transmit to avoid collision. Among them, the device that obtained the MCOT can be referred to as the "owner of the MCOT."

Generally, when the transmitting device is a network device, the transmission in the corresponding MCOT is downlink transmission; when the transmitting device is a terminal, the transmission in the corresponding MCOT is uplink transmission. Optionally, the sending end device may share the obtained channel use right in the MCOT to other devices. For example, when the sending device is a network device, the network device can share the channel usage right with the terminal, that is, the terminal is allowed to transmit within the MCOT. In other words, there will be a switch between uplink transmission and downlink transmission in a certain MCOT. This switching can be one or more times.

When the transmitting end device sends a channel occupancy signal, a company also proposes to consider the channel usage indicator (CUI) in the NR-U system. CUI is similar to the request send / clear send (RTS / CTS) control packet in the WiFi system, but it needs to be redesigned in NR-U. The CUI needs to carry a payload, including a network allocation vector (NAV) and / or a flag that distinguishes between a transmitter or a receiver. Specifically, the above-mentioned CUI is designed as a channel usage indicator physical-downlink control channel (CUI-PDCCH).

When the transmitting device is a network device, a mark in the CUI that distinguishes between a transmitting end or a receiving end indicates that the network device is using the channel as the transmitting end or using the channel as the receiving end.

In practice, when multiple terminal devices need to be instructed to feedback, one way is that the channel occupation signal sent includes information of multiple scheduled terminal devices. Specifically, the channel occupation signal may be carried on a common control channel, for example, a common physical-downlink control channel (C-PDCCH), or a group common-physical downlink control channel , GC-PDCCH), or a data channel (e.g., physical downlink shared channel (PDSCH)) that is scheduled on a common control channel, or partly on a common control channel and another part on the common control Data channel for channel scheduling. The terminal device can detect whether the channel occupancy signal contains the information of the terminal device on the common search space or the group search space, or the terminal device can receive the C-PDCCH / GC in the common search space or the group search space. -PDCCH, and receive the PDSCH scheduled by C-PDCCH / GC-PDCCH, and detect whether the channel occupation signal contains information of the terminal device.

Another way is that the information of multiple scheduled terminal devices in the channel occupancy signal may also be carried through multiple user-specific downlink control channels, or carried on multiple user-specific downlink control channel schedules. Data channels (eg, PDSCH), or part of them are carried by multiple user-specific downlink control channels, and part of them are carried by multiple data channels scheduled by multiple user-specific downlink control channels. The terminal device can detect whether the channel occupancy signal contains the information of the terminal device in the user-specific search space and / or the public search space, or the terminal device can detect the user in the user-specific search space and / or the public search space A specific downlink control channel, and receives a PDSCH scheduled by a user-specific downlink control channel, and detects whether the channel occupation signal contains information of the terminal device.

In the above manner, whether through the CUI-PDCCH, or through the new DCI including the C-RNTI identifier allocated to the terminal device, or through the terminal device specific DCI scrambled by the C-RNTI to notify the terminal device for feedback and occupation, There are more resources and the cost of resources is too high.

In view of this, this application provides a communication method. By grouping the receiving end devices, when the sending end device wants to notify multiple receiving end devices for feedback, only the grouped identifier can be used to instruct multiple terminal devices for feedback. . This can save resources.

In order to facilitate understanding of the embodiments of the present application, a few terms or terms related to the present application are briefly introduced below.

1.Listen to LBT before speaking

In order to ensure coexistence with other devices operating in unlicensed bands, 5G systems or next-generation systems use LBT's channel contention access mechanism. Figures 2 and 3 show two types of LBT listening mechanisms.

One type of LBT listening mechanism is shown in Figure 2. The LBT device can perform independent backoff on multiple carriers, such as component carriers (CC). As shown in FIG. 2, for example, when Wi-Fi is occupied by a competing node, that is, when there is a Wi-Fi protocol data unit on carrier 2, the LBT device independently backs up on carrier 1, carrier 3, and carrier 4 (that is, self-backoff). , Carry out busy extension idle channel evaluation on carrier 2 (such as the busy extension idle channel evaluation slot in FIG. 2). The busy extended idle channel evaluation can be understood as estimating the channel duration occupied by the LBT device on carrier 2. As shown in FIG. 2, the LBT device backs up independently on carrier 2 and carrier 3, and performs busy extended idle channel evaluation on carrier 4. In FIG. 2, the busy initial idle channel evaluation can be understood as the idle channel evaluation performed before the WiFi node is occupied. The idle initial channel evaluation can be understood as the idle channel evaluation performed before the base station is occupied. The busy extended idle channel evaluation can be understood as the channel evaluation during the WiFi node occupation. Idle extension idle channel evaluation can be understood as the channel evaluation performed before data transmission. In the LBT listening mechanism shown in FIG. 2, when the backoff is completed on a certain carrier, transmission is delayed to wait for other component carriers that are still backing off. As shown in carrier 2 to carrier 4 in FIG. 2, specifically, as shown in FIG. 2, when the LBT backs up on carrier 1 and carrier 3, no data is transmitted on carrier 4. After all LBT carriers have completed backoff, the device needs to perform an additional one-shot clear channel assessment (one-shot CCA) to ensure that all carriers are idle. As shown in Figure 2, the idle initial idle channel evaluation duration. If all carriers are idle, the base station transmits on the idle carriers simultaneously. For example, a duration may be 25 microseconds (us).

Another type of LBT listening mechanism is shown in Figure 3. The LBT device performs backoff only on a selected component carrier. As shown in Figure 3, backoff is performed on the selected carrier. At the end of the backoff, before starting data transmission, an initial idle channel assessment is performed on carrier 1, carrier 2, and carrier 3 (such as the busy initial idle channel assessment slot in Figure 3). That is, one-shot CCA is performed on other component carriers when the backoff ends. If the component carrier is idle, data transmission is performed; if the component carrier is not idle, data transmission cannot be performed on the component carrier this time. In FIG. 3, the busy initial idle channel assessment can be understood as the idle channel assessment performed before the WiFi node is occupied. The idle initial channel evaluation can be understood as the idle channel evaluation performed before the base station is occupied. The busy extended idle channel evaluation can be understood as the channel evaluation during the WiFi node occupation. Idle extension idle channel evaluation can be understood as the channel evaluation performed before data transmission.

As shown in FIG. 2 or FIG. 3, the device for performing LBT may be a communication device in a 5G system or a next-generation system, such as LAA, LTE, WiFi, NR-U, or other communication devices operating in an unlicensed band. In Figure 2 or Figure 3, the interference received by the device for LBT comes from the WiFi system. In actual scenarios, the interference received by the device for LBT can also come from the 5G system or the next generation system, such as LAA, LTE, NR-U, or Other communication systems working in the unlicensed frequency band are not limited in this application.

It should be noted that the LBT interception mechanism used in the embodiments of the present application is not limited to the interception mechanism shown in FIG. 2 or FIG. 3.

2.Channel occupation signal

After the transmitting device contends for the channel, it can send a channel occupancy signal to other peripheral devices. This channel occupancy signal can be used to indicate to other devices that the transmitting device needs to occupy the transmission time on the contended channel, thereby avoiding other devices. Collision. In addition, the channel occupancy signal may also instruct other devices to feedback information on channel occupancy.

It should be noted that, in the embodiment of the present application, the channel occupancy signal may also be channel occupancy indication information or channel indication information, and the specific name does not limit the scope to be protected by the present application.

3. Feedback information

In the embodiment of the present application, the feedback information may be used to indicate feedback on a channel occupation signal. Specifically, it is described in the following text application examples.

4.Symbol

The smallest unit of time domain resources. The embodiment of the present application does not limit the time length of a symbol. For different subcarrier intervals, the length of a symbol can be different. The symbols may include uplink symbols and downlink symbols. As an example and not limitation, uplink symbols may be referred to as single carrier-frequency division multiple access (SC-FDMA) symbols or orthogonal frequency division multiple access (orthogonal frequency division multiplexing (OFDM) symbols; downlink symbols may be referred to as OFDM symbols, for example. In the embodiment of the present application, the symbol may be another example of the resource unit.

It should be noted that, in the implementation of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and a related protocol applied to a future communication system, which is not limited in this application.

It should also be noted that in the embodiments of the present application, "pre-defined" may be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate related information in devices (for example, including terminal devices and network devices). This application does not limit its specific implementation. For example, pre-defined can be defined in the protocol.

It should also be noted that in the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning. Information (information), signal (signal), message (message), channel (channel) can sometimes be mixed. It should be noted that when the difference is not emphasized, the meanings to be expressed are the same. "Of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings to be expressed are the same.

It should also be noted that in the embodiments of the present application, “report” and “feedback” are often used interchangeably, but those skilled in the art can understand the meaning. For a terminal device, reporting CSI and feedback CSI can be essentially sending CSI through a physical uplink channel. Therefore, in the embodiments of the present application, when the difference is not emphasized, the meanings to be expressed are the same.

It should also be noted that "and / or" describes the association relationship between the associated objects, and indicates that there can be three kinds of relationships, for example, A and / or B can indicate that: A exists alone, A and B exist simultaneously, and B exists alone These three situations. The character "/" generally indicates that the related objects are an "or" relationship. "At least one" means one or more than one; "At least one of A and B", similar to "A and / or B", describes the association relationship of related objects, and indicates that there can be three kinds of relationships, for example, A and B At least one of them may indicate that there are three cases of A alone, A and B, and B alone. The technical solutions provided in the present application will be described in detail below with reference to the drawings.

It should be understood that the communication method provided in this application may be applicable to a wireless communication system, for example, the wireless communication system 100 shown in FIG. 1. The terminal device in the embodiment of the present application may communicate with one or more network devices at the same time. For example, the network device in the embodiment of the present application may correspond to the network device #A 111, the network device # 2, and the network device in FIG. Any one or more of # 3. The terminal device in the embodiment of the present application may correspond to the terminal device 121 in FIG. 1.

In the following, without loss of generality, the interaction process between a terminal device and a network device is taken as an example to describe the embodiments of the present application in detail. It is assumed that the sending device is a network device and the receiving device is a terminal device. The terminal device may be any terminal device in a wireless communication system that has a wireless connection relationship with one or more network devices. It can be understood that any terminal device or network device in the wireless communication system can implement wireless communication based on the same technical solution. This application does not limit this.

FIG. 4 is a schematic flowchart of a communication method 200 according to an embodiment of the present application, which is shown from the perspective of device interaction. As shown, the method 200 shown in FIG. 4 may include steps 210 and 220. The method 200 is described in detail below with reference to FIG. 4.

210. The network device sends first instruction information, where the first instruction information includes a group identifier corresponding to the terminal device group, and the first instruction information is used to indicate the terminal device feedback channel occupation information, where the terminal device is a group identifier. The terminal equipment in the corresponding terminal equipment group;

220. The terminal device sends feedback information to the network device, and the feedback information includes information about channel occupation of the terminal device.

The first indication may be sent through a group of common signaling. Specifically, the group of common signaling may be carried on a common physical downlink control channel, or a group of common physical downlink control channels, or on a common control channel scheduler. The data channel (such as a physical downlink shared channel), or part of it is carried on a common control channel, and part of it is carried on a data channel PDCCH scheduled by the common control channel, or a common DCI.

The group identifier corresponding to the terminal device group included in the first instruction information may be a direct and explicit instruction, or may be an invisible instruction. For example, the first instruction information may be performed by using the group identifier corresponding to the terminal device group. Scramble.

In the following, without loss of generality, the network device #A and the first instruction information as the instruction information # 1 are used as examples to describe the embodiments of the present application in detail.

Optionally, the indication information # 1 (that is, an example of the first indication information) includes information on channel occupation of the network device #A. After the network device #A competes for the channel, it sends the channel occupation information of the network device #A to other peripheral devices. The channel occupation information of the network device #A can indicate to other devices that the network device #A is on the contested channel. The transmission time that needs to be occupied, thereby avoiding collisions with other devices and improving communication efficiency. The channel occupation information of the network device #A may also be used to indicate which terminal devices are required to respond or feedback the channel occupation information of the network device #A.

It should be understood that the indication information # 1 may include one or more grouped identifiers. Among them, the grouped identification can have multiple ways. For example, in mode A, the grouped identifier may be a group identifier. For another example, in manner B, the grouped identifier may also be a relative identifier after the terminal devices are grouped. For another example, in the method C, the grouped identifier may also be a group identifier and a relative identifier of the terminal device in the group.

It should be noted that, in the embodiments of the present application, the “relative identification of the terminal device” is used to indicate that when multiple terminal devices are grouped into a group, the terminal device may be identified by the relative identification of the terminal device in the group. . Alternatively, instead of grouping, the relative identities of multiple terminal devices may be divided, for example, all the terminal devices involved are globally divided to determine the relative identities of the terminal devices. "Group ID" means that after the terminal devices are grouped, in order to distinguish different groups, different group IDs can be divided for different groups. "Relative identification of terminal devices in a group" means that after grouping terminal devices, in order to distinguish different groups, different group identifiers can be divided for different groups, and the terminal devices can be divided into the terminal device groups to which they belong. The identifier is the relative identifier of the terminal device in the group.

It should be understood that the “relative identification of the terminal device”, the “group identification”, and the “relative identification of the terminal device in the group” are only for distinguishing different objects, and their specific names do not limit the scope to be protected in the embodiments of the present application.

When the indication information # 1 includes multiple grouped identifiers, it can be used to instruct the terminal devices in the multiple terminal device groups corresponding to the multiple group identifiers to provide feedback. When the indication information # 1 is used to instruct the terminal devices in the terminal device group corresponding to the group identifier to perform feedback, some terminal devices in the terminal device group may be instructed to perform feedback, which is not limited in this embodiment of the present application. Among them, some terminal devices include one or more terminal devices. When the indication information # 1 includes the relative identification after the terminal devices are grouped, it may be the relative identification of the terminal devices involved, and then specify the terminal devices that need feedback, where the relative identification of the terminal devices may be for all involved terminal devices. Global division. When the indication information # 1 includes the group identifier and the relative identifier of the terminal device in the terminal device group, the terminal device that needs feedback can be specified by the group identifier and the relative identifiers of one or more terminal devices in the group. Among them, The relative identification of terminal devices in a group is obtained by dividing all the terminal devices involved in the group. Therefore, the number of bits used to indicate the relative identity of the terminal device in the group may be less than the number of bits used to indicate the relative identity of the terminal device.

Based on the embodiment of the present application, the grouped identifier may be used to instruct some terminal devices in the terminal device group to feed back channel occupation information. The grouped identification can not only avoid the waste of resources caused by using the C-RNTI identification for each terminal device, but also use some terminal devices in the group to represent all the terminal devices in the terminal device group for feedback, which can further save resources. This will be specifically described below.

Optionally, before notifying a plurality of terminal devices to perform feedback on the channel occupation duration, the network device #A may first group the plurality of terminal devices to obtain a plurality of terminal device groups. A terminal device group has a one-to-one correspondence with a group identifier, and each terminal device group may include one or more terminal devices. Each terminal device may have an identifier (that is, an example of a relative identifier) in the terminal device group to which it belongs.

Among them, the network device #A may be a grouping of all terminal devices, and the grouping may be performed in a manner such as mode C; or may be a grouping of terminal devices in need of feedback, such as a mode B or a mode after the grouping. C is used for identification, which is not limited in the embodiment of the present application. For example, after grouping all terminal devices, if the identification is performed in the manner C, the obtained grouped identification may be a group identification and a relative identification of the terminal device in the terminal device group. For another example, after grouping terminal devices that need to be feedbacked, if they are identified by way B or C, the obtained grouped identifiers may be the relative identifiers of the terminal devices among the terminal devices that need to be feedbacked. Network device #A may group multiple terminal devices in at least one of the following two ways.

Method 1: Group according to the interference situation.

Specifically, it is assumed that the terminal device is in a connected state, based on a reference signal receiving power (RSRP) in the licensed spectrum, and / or, a reference signal receiving quality (RSRQ), and / or, a reference For measurement and feedback of the signal strength indication (reference indication / indicator, RSSI), the network device #A can know the approximate location situation. Network device #A reports the measurement results in the authorized spectrum and assigns groups to these terminal devices. For example, terminal devices with similar locations can be grouped together. As shown in Figure 5. Network device #A divides multiple terminal devices into 4 groups, which are respectively labeled as: terminal device group 1, terminal device group 2, terminal device group 3, and terminal device group 4, among which the terminal devices included in each terminal device group The locations are similar.

It should be understood that the above-mentioned network device #A is based on at least one of RSRP, RSRQ, and RSSI measurement, and can know the approximate location situation, which is only an exemplary description. This application is not limited to this. The method of the location situation belongs to the protection scope of the embodiment of the present application.

Optionally, the network device #A may send indication information # 3 (that is, an example of the third indication information) to the terminal device, and the indication information # 3 includes a group identifier, or the indication information # 3 includes a relative identifier of the terminal device, or The indication information # 3 includes a group identifier and a relative identifier of the terminal device in the terminal device group to which the terminal device belongs. The indication information # 3 can indicate the group to which these terminal devices belong and the identification of these terminal devices in the terminal device group to which they belong, so that these terminal devices can know the corresponding group identification and the identification in the terminal device group (that is, the relative identification). An example). The indication information # 3 can also directly indicate the relative identification of the terminal device.

Specifically, assuming that terminal device group 1 includes five terminal devices, the relative identifications of these five terminal devices in terminal device group 1 can be recorded as: terminal device 1.1 in terminal device group 1, and terminal device group 1 in terminal device group 1. Terminal device 1.2, terminal device 1.3 in terminal device group 1, terminal device 1.4 in terminal device group 1, and terminal device 1.5 in terminal device group 1. For another example, the terminal device group 2 includes three terminal devices, and the relative identifiers of the three terminal devices in the terminal device group 2 can be recorded as: terminal device 2.1 in the terminal device group 2 and terminals in the terminal device group 2 Device 2.2, terminal device 2.3 in terminal device group 3. Alternatively, the indication information # 3 may also directly indicate the relative identification of the terminal device. For example, assuming that a terminal device group includes 5 terminal devices, the relative identification of the terminal devices may be: terminal devices in the entire terminal device group 1, terminal devices in the entire terminal device group 2, and terminal devices in the entire terminal device group 3. Terminal devices in the entire terminal device group 4, Terminal devices 5 in the entire terminal device group; or, the relative identification of the terminal devices may be: terminal devices a in the entire terminal device group, terminal devices in the entire terminal device group b. Terminal device c in the entire terminal device group, terminal device d in the entire terminal device group, and terminal device e in the entire terminal device group.

It should be understood that the foregoing specific identification manner is merely an exemplary description, and the embodiments of the present application are not limited thereto. Any identification method that can distinguish different terminal device groups, or any relative identification that can distinguish terminal devices, or any identification method that can distinguish different terminal devices within a terminal device group, belongs to the protection scope of the embodiments of this application.

Optionally, the indication information # 3 may be notified on the authorized spectrum through related signaling or data information, for example, it may be semi-static radio resource control (radio resource control (RRC) signaling), or media access control ( media access control (MAC) layer signaling, or sent via RRC signaling and activated / deactivated by physical layer signaling or MAC layer signaling. The RRC signaling may be UE-dedicated signaling, or signaling sent through broadcast information or multicast information.

Method 2: group according to whether or not feedback is performed.

Specifically, the terminal devices that need feedback can be divided into a group. For example, assuming that 20 terminal devices need feedback, the 20 terminal devices can be divided into one or more groups. In this way, each group may select one or more representative terminal equipment for feedback, thereby saving the resource cost required when the terminal equipment feeds back channel occupied information.

Optionally, when selecting a representative terminal device, reference may be made to the channel duration required by the terminal device for selection. For example, there are three terminal devices that need to be scheduled, the three terminal devices are located close to each other, and the interference situation is approximately the same. The channel usage time obtained by the first terminal device based on the buffer amount is small, the channel usage time obtained by the second terminal device based on the buffer amount is large, and the channel usage time obtained by the third terminal device according to the buffer amount is the above two In between, you can choose a third terminal device as a representative terminal device. The feedback information can be used for feedback using the channel usage time of the terminal device.

Optionally, when a representative terminal device is selected, a representative terminal device may also be selected according to a similar interference situation. The indication information # 1 may additionally include the channel occupation duration information included when the terminal device needs feedback, so that the representative terminal device uses the channel occupation duration information included in the above indication information # 1 as a terminal during feedback. The channel occupancy time reported by the device. For example, there are three terminal devices that need to be scheduled, the three terminal devices are close to each other, and the interference situation is approximately the same. Although the buffer requirements are different, network device #A can select according to the interference situation, and it can also issue additional channel occupation recommendations Duration reference value. When the representative terminal equipment feeds back, the channel occupancy duration reference value included in the above indication information # 1 may be used as the channel occupancy duration fed back by the terminal equipment. There may be one or more representative terminal devices. When there are multiple representative terminal devices, the network device #A may issue a common reference value for the recommended channel occupation duration, or may refer to the recommended feedback channel occupation duration corresponding to different representative terminal devices in turn. value. Therefore, during feedback, these representative terminal devices can perform corresponding feedback by referring to the above-mentioned reference value of the channel occupation duration reference value for feedback.

The above two methods are merely exemplary descriptions, and the embodiments of the present application are not limited thereto. Other methods and processes capable of grouping terminal devices fall within the protection scope of this application. For example, the above methods 1 and 2 may also be used. Joint use, that is, the network device #A can group terminal devices by combining whether feedback and whether interference situations are similar. Or, for example, the terminal device is divided into a group of terminal devices, and the indication information # 1 may include a relative identifier of the terminal device. The group of terminal devices may be a part of all the terminal devices served by the network device, that is, the part of the terminal devices is selected as a group of terminal devices from all the terminal devices according to a certain criterion. For example, this part of the terminal equipment is a terminal equipment selected to perform communication on an unlicensed spectrum according to a communication capability, wherein the communication capability is whether it supports a capability of transmitting data in an unlicensed spectrum or has an LBT capability. The above communication capabilities can be reported by the terminal device to the network device, so the network device relatively identifies the terminal devices based on the reported information.

After the network device #A groups the terminal devices, it may instruct some terminal devices in the terminal device group to feedback information about channel occupation. In the embodiment of the present application, the network device #A instructs the terminal device to perform feedback, which may or may not be based on a dynamic trigger. Specifically, at least the following three cases are included.

Case 1: Instruct a specific terminal device in the terminal device group to perform feedback.

Optionally, the indication information # 1 includes a group identifier and a relative identifier of the terminal device in the terminal device group. The relative identifier is an identifier of a terminal device in a terminal device group to which the terminal device belongs. Specifically, based on dynamic triggering, through dynamic triggering, DCI format X contains information indication of the terminal device to be activated for reporting, that is, the group identifier and the relative identifier of the terminal device in the terminal device group to which it belongs. Only these designated end devices will feedback. As shown in FIG. 6, the DCI format issued by network device #A includes a group identifier, such as terminal device group 1, terminal device group 2, and terminal device group 3 in FIG. In other words, the terminal devices in terminal device group 1, terminal device group 2, and terminal device group 3 need to feed back channel occupancy information sent by network device #A. In addition, the issued DCI format may further indicate a specific terminal device. As shown in FIG. 6, the identifier of the terminal device in the terminal device group 1 that needs to be feedback is: the terminal device 1.x located in the terminal device group 1, and the identifier of the terminal device that needs to be feedback in the terminal device group 2 is that: The terminal equipment 2.x in the group 2 and the terminal equipment in the terminal equipment group 3 need to be identified are: the terminal equipment 3.x located in the terminal equipment group 3. In addition, the group identifier and the relative identifier of the terminal device in the terminal device group may be direct and explicit instructions, or may be invisible instructions, such as the indication information # 1 may be obtained through the group identifier and the terminal device in the terminal device group. Scramble relative to the identity.

Optionally, the message sent by the network device #A may be message 2, that is, a random access response, and the indication information # 1 may be carried in a random access response message. Alternatively, the network device #A may issue a DCI similar to a paging message.

Optionally, the indication information # 1 may include a relative identifier of the terminal device. The relative identifier is an identifier of the terminal device in the divided terminal devices. The relative identification including only the terminal equipment can be understood as that the above-divided terminal equipment is divided into a group, so the relative identification of the terminal equipment in the group is the relative identification of the terminal equipment. Specifically, when instructing a specific terminal device to perform feedback, the dynamic triggering may be used. Through the dynamic triggering, the DCI format contains an information indication of the terminal device to be activated for reporting, that is, the relative identification of the terminal device. The end device will respond. As shown in FIG. 7, the group identifier included in the DCI format issued by network device #A can be omitted (that is, it does not need to be included), and the identifier of the terminal device that needs to be fed back is the relative identifier of the terminal device: that is, it is located in the entire terminal device group Terminal device x, terminal device y, terminal device z, etc. In addition, the relative identification including the terminal device may be a direct explicit instruction or an invisible instruction, such as scrambling the instruction information # 1 through the relative identification of the terminal device.

Wherein, these specified terminal devices are, for example, terminal devices 1.x located in terminal device group 1, terminal devices 2.x located in terminal device group 2, terminal devices 3.x located in terminal device group 3, or The terminal device x, terminal device y, and terminal device z located in the entire terminal device group may be representative terminal devices in each terminal device group determined by the network device. For example, network device #A can measure and feedback based on at least one of RSRP, RSRQ, and RSSI in the authorized spectrum, and can roughly know the interference situation of each terminal device. Then, network device #A can select a part that can represent the terminal device group Terminal device to feedback the channel occupation information of network device #A. Alternatively, these specified terminal devices may also be randomly specified by network device #A. Alternatively, these specified terminal devices may be the manners mentioned in manner 2 above. Alternatively, these specified terminal devices may also be determined by network device #A according to the state of the terminal device, and so on.

It should be noted that the terminal device selected by network device #A may be a terminal device that can send corresponding NAV on behalf of a terminal device group, and this terminal device can be used as a terminal device representing the surrounding interference situation and the feedback channel occupation of NAV situation. To indicate the channel occupation. Whether the terminal device is scheduled in the next MCOT is uncertain. In other words, the terminal device may only be selected to be used to notify surrounding devices of the channel occupation situation, but it is not necessarily the terminal device to be scheduled.

It should also be noted that the above is only an exemplary description of which terminal devices are designated by the network device #A for feedback, and this embodiment of the present application is not limited to this. Anything that can cause the network device #A to determine some terminals in the terminal device group The solutions for device feedback fall into the protection scope of the embodiment of the present application. For example, the network device #A may also determine the number of terminal devices that need feedback or the number of terminal devices that need feedback according to the situation of the feedback resources. Conversely, the network device #A may also configure the feedback resources according to the number of terminal devices that need to be fed back.

It should also be noted that, as shown in FIG. 6, the instruction information #A sent by the network device #A may further include at least one of Tx / Rx and NAV. Among them, Tx means channel occupancy notification initiated by the transmitting end, Rx means channel occupancy notification initiated by the receiving end, and NAV indicates time duration information of the channel occupancy. By Tx / Rx, it can be determined whether the channel occupation notification is initiated by the transmitting end or the receiving end. In addition, in addition to the NAV used to indicate the channel occupation duration information, the network device may also include the recommended feedback channel occupation duration information. The recommended feedback channel occupation duration information may be a reference value, which is used to instruct the terminal device to perform feedback The channel occupation duration included in the time can be set by referring to the channel occupation duration information fed back by the proposal. The setting of the channel occupation duration information with reference to the recommendation feedback may be directly setting the reference channel occupation duration reference value to the channel occupation duration included in the feedback from the terminal device, or the channel occupation duration feedback according to the recommendation. The reference value is used as an input of a function to derive the channel occupation duration included in the feedback from the terminal device. The function can be expressed as y = F (x), and the function can be a linear function, such as: F (x) = k * x, where k is a positive integer, which is included in the feedback of the terminal device. The channel occupation duration y is proportional to the reference channel occupation duration reference value x of the suggestion feedback. Alternatively, the function may also be a non-linear function, such as: F (x) = k * x ² , that is, the channel occupation duration y included in the feedback from the terminal device is influenced by the reference value of the channel occupation duration feedback provided by the recommendation. Derived from a non-linear function of.

Case 2: Instruct some specific terminal equipment groups to provide feedback.

Optionally, the indication information # 1 includes one or more group identifiers. Specifically, based on dynamic triggering, through dynamic triggering, DCI format X contains an information indication of a group to be activated for reporting, that is, a group identifier is indicated, and only these specified terminal device groups will feedback. For example, it is assumed that there are four terminal device groups shown in FIG. 5, terminal device group 1, terminal device group 2, terminal device group 3, and terminal device group 4. As shown in FIG. 8, the DCI format issued by network device #A includes a group identifier: terminal device group 1, terminal device group 2, and terminal device group 3. In other words, among the four terminal device groups, only the terminal devices in terminal device group 1, terminal device group 2, and terminal device group 3 need to feed back channel occupancy information sent by network device #A.

Then, which terminal devices in the specified terminal device group need feedback can be determined based on automatic competition.

Optionally, the terminal device determines whether to feed back channel occupation information according to the group identifier and the first threshold. Specifically, the terminal device may randomly generate a value between a preset minimum value and a preset maximum value, and compare the value with a first threshold value to determine whether the terminal device needs to feed back channel occupation information. . For example, when a value randomly generated by a terminal device is less than the first threshold, it is determined that the terminal device needs to feedback information about channel occupation. The first threshold may also be understood as a reference comparison value, which is used by the terminal device to determine whether the information of channel occupation needs to be fed back.

The preset minimum value, and / or, the preset maximum value, and / or the first threshold value may be sent by the network device #A to the terminal device, for example, through RRC signaling, or through MAC. Layer signaling, or sent via RRC signaling and activated / deactivated by physical layer signaling or MAC layer signaling. Alternatively, the preset minimum value, and / or, the preset maximum value, and / or the first threshold value may also be specified in the protocol or pre-stored, which is not limited in the embodiment of the present application. The preset minimum value, preset maximum value, and first threshold value can be understood as parameters for the terminal device group. The minimum values corresponding to different terminal device groups can be the same or different, and the maximum values of different terminal device groups can also be The same or different, the first thresholds of different terminal device groups may also be the same or different. The preset minimum value, preset maximum value, and first threshold may be configured by the network device for the terminal device group, or may be configured by the network device according to the interference situation of each terminal device group, or may be It is randomly determined, or it may be stipulated in the agreement, or it may be determined based on historical data.

It should be understood that in the foregoing, specific terminal devices are determined in combination with different parameters, but it should be understood that this is only an example given for ease of understanding and should not constitute any limitation to this application. The above-mentioned parameters or specific numerical values of the parameters are only determined based on the existing parameters, and this application does not exclude the possibility of giving new definitions in future agreements.

Case 3: Feedback is provided for each group by default.

Specifically, when there is no dynamic trigger, all resources related to the terminal device group are pre-configured by RRC signaling, and it is assumed that all groups require default feedback. Similarly, which terminal device in the terminal device group can perform feedback based on Automatic competition determination as described in case 2 above.

The above three cases are merely illustrative, and the embodiments of the present application are not limited thereto. For example, case 1 and case 2 may occur at the same time.

The three cases above have exemplarily introduced terminal devices in the terminal device group that need to feedback channel occupation information. The following specifically describes the feedback resources used by the terminal device to feedback the information occupied by the channel. The resources used by the terminal device to feedback the information occupied by the channel can be determined by at least the following two methods.

Method 1: The terminal device determines the resource used by the information occupied by the feedback channel by using the correspondence between the group identifier and the feedback resource (for simplicity, it is recorded as the first correspondence).

The first correspondence relationship may be a correspondence relationship between the group identifier and the feedback resource, or a correspondence relationship between the position information of the group identifier in the indication information #A and the feedback resource. The feedback resource includes resources used by the terminal device to feedback the information occupied by the channel. In other words, the terminal device may use some or all of the corresponding feedback resources. They are described in detail below.

In a possible implementation manner, the terminal device directly determines the resource used by the information occupied by the feedback channel according to the correspondence between the group identifier and the feedback resource.

Specifically, as shown in FIG. 9, if the indication information #A includes a group identifier corresponding to the terminal device group 1, the terminal device group 2, the terminal device group 3, and the terminal device group 4, it can be understood that the network device #A indicates the terminal The terminal equipment in the equipment group 1, the terminal equipment group 2, the terminal equipment group 3, and the terminal equipment group 4 feeds back channel occupation information. The specific terminal equipment feedback channel occupancy information may be based on any of the above three situations, which will not be described again here. The terminal device may determine the resources used when these terminal devices feedback the information occupied by the channel based on the corresponding relationship in FIG. 9. In FIG. 9, the left column indicates the feedback resource, and the right column indicates the group identifier where the corresponding terminal device is located, and there is a corresponding relationship between the two. For example, when the terminal equipment in the terminal equipment group 1 feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group 1 may be used. For another example, when the terminal equipment in the terminal equipment group 2 feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group 2 may be used. For another example, when the terminal equipment in the terminal equipment group 3 feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group 3 may be used. For another example, when the terminal equipment in the terminal equipment group 4 feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group 4 may be used.

The network device may configure a control resource set (CORSET) resource for the feedback resource through RRC signaling. The feedback resources may be some common search spaces configured by the base station through RRC signaling, and the common search spaces may be specifically allocated corresponding to the uplink feedback channel occupation information.

The correspondence between the group identifier and the feedback resource may be a semi-static configuration. For example, it may be notified to the terminal device after the network device #A is configured in advance, for example, by RRC signaling, or by MAC layer signaling, or by RRC signaling and sent by physical layer signaling or MAC layer signaling. Activate / deactivate. Alternatively, the correspondence between the group identifier and the feedback resource may be a pre-stored correspondence.

In another possible implementation manner, the terminal device determines the resource used by the information occupied by the feedback channel according to the correspondence between the position information of the group identifier in the indication information #A and the feedback resource.

First, FIG. 10 is a schematic diagram showing the position of a group identifier in the indication information #A. As shown in FIG. 10, it is assumed that the instruction information indicates that the terminal device group 1, the terminal device group 2, the terminal device group 3, and the terminal device group 4 feed back channel occupation information. Then the terminal device group at the first position in the indication information #A is the terminal device group 4, or the terminal device group 4 is at the first position in the indication information #A. Similarly, the terminal device group at the second position in the indication information #A is the terminal device group 1, or the terminal device group 1 is at the second position in the instruction information #A. The terminal device group at the third position in the instruction information #A is the terminal device group 2, or the terminal device group 2 is at the third position in the instruction information #A. The terminal device group at the fourth position in the instruction information #A is the terminal device group 3, or the terminal device group 3 is at the fourth position in the instruction information #A.

It should be noted that the position information of the group identifier of the terminal device group in the indication information #A is introduced in FIG. 10 above, and the embodiment of the present application does not limit that the indication information #A includes only the group identifier. For example, the indication information #A may be included in a DCI format as shown in FIG. 6, FIG. 7, or FIG. 8. Taking the DCI format shown in FIG. 6 as an example, it can be seen from FIG. 6 that the terminal device group at the first position in the instruction information #A is the terminal device group 1, or that the terminal device group 1 is in the instruction information # The position in A is the first. The terminal device group at the second position in the instruction information #A is the terminal device group 2, or the terminal device group 2 is at the second position in the instruction information #A. The terminal device group at the third position in the instruction information #A is the terminal device group 3, or the terminal device group 3 is at the third position in the instruction information #A. Here, for brevity, I will not repeat them.

It should also be noted that, in the following embodiments, the position information of the relative identifier involved is similar to that in FIG. 10, and only the group identifier is replaced by the relative identifier. The following is concise and will not be described again.

Specifically, as shown in FIG. 11, if the indication information #A includes a group identifier corresponding to the terminal device group 1, the terminal device group 2, the terminal device group 3, and the terminal device group 4, it can be understood that the network device #A indicates the terminal The terminal equipment in the equipment group 1, the terminal equipment group 2, the terminal equipment group 3, and the terminal equipment group 4 feeds back channel occupation information. The specific terminal equipment feedback channel occupancy information may be based on any one of the above three situations, which will not be repeated here. The terminal device may determine the resources used when these terminal devices feedback the information occupied by the channel based on the corresponding relationship in FIG. 11. In FIG. 11, the left column indicates the feedback resource, and the right column indicates the relative position of the group identifier where the corresponding terminal device is located in the indication information #A, and there is a corresponding relationship between the two. For example, when the terminal device in the terminal device group located at the first position in the indication information feeds back channel occupation information, a pre-configured feedback resource (denoted as the first feedback resource) for the terminal device group located at the first position may be used. ). With reference to FIG. 10, it can be seen that the terminal device group 4 uses the first feedback resource. For another example, when the terminal device in the terminal device group 1 located at the second position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal device group 1 located at the second position (denoted as the first Two feedback resources). That is, in conjunction with FIG. 10, the terminal device group 1 uses the second feedback resource. For another example, when the terminal device in the terminal device group 2 located at the third position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal device group 2 located at the third position (denoted as the third Three feedback resources). That is, in conjunction with FIG. 10, the terminal device group 2 uses the third feedback resource. For another example, when the terminal equipment in the terminal equipment group 3 located at the fourth position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group 3 located at the fourth position (denoted as the first Four feedback resources). With reference to FIG. 10, it can be seen that the terminal device group 3 uses the fourth feedback resource. The pre-configured feedback resource is the feedback resource configured by the network device through RRC signaling.

The corresponding relationship between the relative position of the group identifier and the feedback resource may be a semi-static configuration. For example, it may be notified to the terminal device after the network device #A is configured in advance, for example, by RRC signaling, or by MAC layer signaling, or by RRC signaling and sent by physical layer signaling or MAC layer signaling. Activate / deactivate. Alternatively, the correspondence between the relative position of the group identifier and the feedback resource may be a pre-stored correspondence. The pre-save is set or written on the device in advance.

In addition, the corresponding relationship between the relative position of the group identifier and the feedback resource can also be exchanged according to the actual situation. For example, when the terminal device in the terminal device group located at the first position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal device group located at the third position may be used. For another example, when the terminal equipment in the terminal equipment group located at the second position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group located at the second position may be used. For another example, when the terminal equipment in the terminal equipment group located at the third position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group located at the fourth position may be used. For another example, when the terminal equipment in the terminal equipment group located at the fourth position in the indication information feeds back channel occupation information, a feedback resource pre-configured for the terminal equipment group located at the first position may be used. The above correspondence can be a one-to-one correspondence based on sequence design, or a one-to-one correspondence arranged in order (where the order can be based on ascending or descending order), or a one-to-one correspondence directly designated by the network device. .

Optionally, the resources used by the information occupied by the feedback channel may also be determined according to the corresponding relationship between the relative identification of the terminal device and the feedback resources. Specifically, the group identifier in the method 1 may also be directly replaced with the relative identifier of the terminal device. For example, the group identifier of FIG. 9 and FIG. 11 may be replaced with the relative identifier of the terminal device, and the resources used by the information occupied by the feedback channel may be determined according to the correspondence between the relative identifier of the terminal device and the feedback resource.

In a possible implementation manner, the terminal device directly determines the resource used by the information occupied by the feedback channel according to the corresponding relationship between the relative identification of the terminal device and the feedback resource. For example, as shown in FIG. 12, the terminal device may determine the resource used by the information occupied by the feedback channel according to the corresponding relationship between the relative identification of the terminal device and the feedback resource. Specifically, it is similar to the embodiment in FIG. 9, which is brevity and will not be repeated here.

In another possible implementation manner, the terminal device determines the resource used by the information occupied by the feedback channel according to the correspondence between the position information of the relative identification of the terminal device in the indication information #A and the feedback resource. For example, as shown in FIG. 13, the correspondence between the position information of the relative identification of the terminal device in the indication information #A and the feedback resource determines the resource used by the information occupied by the feedback channel. Specifically, it is similar to the embodiment in FIG. 11, which is brevity and will not be repeated here.

It should be understood that the foregoing is merely an exemplary description, and the embodiments of the present application are not limited thereto. Any device that can implement the group identifier or the relative position of the group identifier, or the terminal device relative identifier or the position of the relative identifier, can further determine the terminal device in the terminal device group corresponding to the group identifier, or the terminal device relative The schemes for identifying the corresponding terminal equipment and the resources used when feeding back the information occupied by the channel fall into the scope of protection of the embodiments of this application.

Method 2: The terminal device determines the resource used for the information occupied by the feedback channel by using the corresponding relationship between the relative identifier and the feedback sub-resource (for simplicity, recorded as the second correspondence).

The second correspondence may be any one of the following: the correspondence between the relative identifier and the feedback sub-resource, the correspondence between the position information of the relative identifier in the indication information #A and the feedback sub-resource, and the relative identifier and The corresponding relationship between the feedback resources is the corresponding relationship between the relative identification position information in the indication information #A and the feedback resource. They are described in detail below.

Specifically, further, when the indication information #A includes the relative identification of the terminal device in the terminal device group to which the terminal device belongs, and if there are multiple sub-resources (that is, an example of the feedback sub-resource) related to the corresponding feedback resource, The device may further select a feedback sub-resource based on the second correspondence. Alternatively, when multiple terminal devices in a terminal device group want to feed back channel occupation information, they can further select a feedback sub-resource based on the second correspondence.

In a possible implementation manner, the terminal device directly determines the resource used by the information occupied by the feedback channel according to the corresponding relationship between the relative identifier and the feedback sub-resource.

Specifically, assuming that the network device #A instructs multiple terminal devices in the terminal device group to feedback the channel occupation information, the resources used by each terminal device to feedback the channel occupation information may be based on the correspondence between the relative identifier and the feedback sub-resource. Relationship determination. As shown in FIG. 14, the left column represents the feedback resource, and the right column represents the relative identification of the corresponding terminal device in the group to which it belongs, and there is a corresponding relationship between the two. For example, suppose network device #A instructs terminal device 1.1, terminal device 1.2, and terminal device 1.3 in terminal device group 1 to feedback channel occupation information, and the pre-configured feedback resources for terminal device group 1 include sub-resource 1, sub-resource 2. For sub-resource 3, the resource may be determined according to the corresponding relationship between the relative identifier corresponding to the terminal device and the sub-resource. For example, when the terminal device 1.1 in the terminal device group 1 feeds back channel occupation information, the sub-resource 1 in the feedback resources pre-configured for the terminal device group 1 may be used. For another example, when the terminal device 1.2 in the terminal device group 1 feeds back channel occupation information, the sub-resource 2 in the feedback resource pre-configured for the terminal device group 1 may be used. For another example, when the terminal device 1.3 in the terminal device group 1 feeds back channel occupation information, the sub-resource 3 in the feedback resources pre-configured for the terminal device group 1 may be used. Similarly, the above-mentioned correspondence relationship may be a one-to-one correspondence based on sequence design, or a one-to-one correspondence arranged in order (where the orderly arrangement may correspond according to ascending or descending order), or a one directly designated by a network device. One correspondence.

The corresponding relationship between the relative identifier and the feedback sub-resource may be a semi-static configuration. For example, it may be notified to the terminal device after the network device #A is configured in advance, for example, by RRC signaling, or by MAC layer signaling, or by RRC signaling and sent by physical layer signaling or MAC layer signaling. Activate / deactivate. Alternatively, the correspondence between the relative identifier and the feedback sub-resource may also be a pre-stored correspondence.

In addition, when the number of terminal devices that need feedback in each terminal device group is less than the number of feedback sub-resources in the feedback resource, one or more feedback sub-resources may be randomly selected for feedback. In this regard, the embodiments of the present application are not limited.

In another possible implementation manner, the terminal device determines the resource used by the information occupied by the feedback channel according to the correspondence between the position information of the relative identifier in the indication information #A and the feedback sub-resource.

Specifically, as shown in FIG. 15, assuming that the indication information #A indicates that three terminal devices in the terminal device group 1 feedback channel occupation information, the three terminal devices can determine these terminal devices based on the corresponding relationship in FIG. 15. Resources used when feeding back channel occupied information. In FIG. 15, the left column indicates the feedback resource, and the right column indicates the relative position of the relative identifier of the terminal device in the terminal device group 1 in the indication information #A, and there is a corresponding relationship between the two. For example, when the terminal device located at the first position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the first position may be used. For another example, when the terminal device located at the second position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the second position may be used. For another example, when the terminal device located at the third position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the third position may be used.

The corresponding relationship between the position of the relative identification and the feedback sub-resource may be a semi-static configuration. For example, it may be notified to the terminal device after the network device #A is configured in advance, for example, by RRC signaling, or by MAC layer signaling, or by RRC signaling and sent by physical layer signaling or MAC layer signaling. Activate / deactivate. Or, the correspondence between the position of the relative identification and the feedback sub-resource may also be a pre-stored correspondence.

In addition, the corresponding relationship between the position of the relative identification and the feedback sub-resource can also be exchanged according to the actual situation. For example, when the terminal device located at the first position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the third position may be used. For another example, when the terminal device located at the second position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the first position may be used. For another example, when the terminal device located at the third position in the indication information feeds back channel occupation information, a feedback sub-resource pre-configured for the terminal device located at the second position may be used.

Optionally, in the method 2, the terminal device may also directly determine the resource used by the information occupied by the feedback channel through the correspondence between the relative identifier and the feedback resource.

In a possible implementation manner, the terminal device directly determines the resource used by the information occupied by the feedback channel according to the corresponding relationship between the relative identifier and the feedback resource.

In another possible implementation manner, the terminal device determines the resource used by the information occupied by the feedback channel according to the correspondence between the position information of the relative identifier in the indication information #A and the feedback resource.

It should be understood that the foregoing is merely an exemplary description, and the embodiments of the present application are not limited thereto. Any scheme that can realize the resources used when the terminal device corresponding to the relative identifier feedbacks the information occupied by the channel according to the relative identifier or the relative position of the relative identifier in the instruction information, etc., belongs to the protection scope of the embodiment of this application. .

It should be noted that the foregoing two methods and possible implementation manners of the two methods are merely exemplary descriptions, and the embodiments of the present application are not limited thereto. Any method that can cause the terminal device to determine the resources used by the feedback channel according to the first correspondence relationship and / or the second correspondence relationship belongs to the protection scope of the embodiment of the present application.

It should also be noted that the above-mentioned first correspondence relationship and the second correspondence relationship may be independently configured and delivered separately, or the second correspondence relationship may also be configured and delivered as subsidiary information of the first correspondence relationship. This is not limited.

The foregoing describes how the terminal device determines the resources used by the feedback channel occupied information with reference to FIGS. 9 to 15. After the terminal device determines the feedback information, it can feedback the channel occupation information based on the pre-configured feedback resources.

Optionally, the channel occupation information (that is, an example of feedback information) of the terminal device includes the duration information of the channel occupation, and / or, as the information of the channel occupied by the transmitting end or the receiving end. In other words, the feedback information of the terminal device may include NAV, and / or Tx / Rx.

The information about the channel occupied by the transmitting end or the receiving end indicates whether the terminal device is using the channel as the transmitting end device or using the channel as the receiving end device.

Based on the feedback from the terminal device, network device #A can enter the MCOT data scheduling stage, and the scheduled terminal device is not necessarily the terminal device selected by network device #A for feedback. The nodes around the feedback terminal device, including surrounding network devices and surrounding terminal devices (whether the terminal device in network device #A or the terminal device in the neighboring network device) can perform the corresponding behavior according to the NAV feedback from the terminal device. . When the NAV is transmitted and the sender's instructions are carried, the surrounding nodes may not be limited to the NAV and can continue to communicate, or the threshold judgment value affected by the NAV is large, only when the detected interference When the value is greater than the second threshold value (a larger threshold value), it is prohibited to use the channel within the indicated NAV time. When the NAV is sent and the receiver's instructions are carried, the surrounding nodes need to be restricted. For the NAV, that is, when the detected interference is greater than the first threshold value (a smaller threshold value), it is necessary to prohibit the use of the channel within the indicated NAV time.

The setting of the first threshold value and the second threshold value may be prescribed in the protocol, or may be set by a network device and sent to the terminal device. This is not limited.

The following describes the embodiments of the present application with specific examples. FIG. 16 shows a specific embodiment of a communication method applicable to an embodiment of the present application. The method 400 includes:

410. The network device sends group information to multiple terminal devices.

Specifically, the network device groups multiple terminal devices and obtains one or more terminal device groups. Each terminal device group corresponds to a group identifier. Each terminal device group includes one or more terminal devices. Each terminal device may have a relative identifier in the terminal device group to which it belongs. The grouping information sent by the network device to the multiple terminal devices may include a group identifier to which the terminal device belongs, or a relative identifier of the terminal device, or a group identifier to which the terminal device belongs and its relative identifier in the terminal device group.

420: The network device configures a feedback resource, and / or, a feedback sub-resource.

430: The network device performs notification of the first correspondence and / or notification of the second correspondence.

The network device may configure the feedback resource, and the terminal device may determine the resource used by the information occupied by the feedback channel according to the correspondence between the group identifier and the feedback resource. Alternatively, the network device may further configure the feedback sub-resource and issue the correspondence between the relative identifier and the feedback sub-resource. The terminal device may further determine the information occupied by the feedback channel according to the correspondence between the relative identifier and the feedback sub-resource. Resources used. The first correspondence relationship and the second correspondence relationship have been described in detail in the above embodiments, which are brevity and will not be described again here.

Specifically, reference may be made to method 1 and method 2 above, which are brevity and will not be repeated here.

440. The network device includes a group identifier in the DCI, or a relative identifier of the terminal device, or a group identifier and a relative identifier of the terminal device in the group to which the terminal device belongs.

Specifically, the format of the DCI issued by the network device may be as shown in FIG. 6, FIG. 7, or FIG. 8. For example, when the network device includes a group identifier in the DCI, the terminal device receives the group identifier and can determine whether it is the identifier of the terminal device group to which it belongs. If the DCI includes the identity of the terminal equipment group to which it belongs, it is determined that the terminal equipment in the terminal equipment group to which it belongs needs to feedback the channel occupation information, and then it further determines whether it needs feedback based on the relative identity or automatic competition.

Specifically, reference may be made to case 1 to case 3 above, which is brevity and will not be described again here.

450. Whether the terminal device has a relative identifier or an identifier of the terminal device in the group to which it belongs.

460. The designated terminal device will perform feedback on the channel occupation notification on the corresponding feedback resource.

When the DCI contains the relative identification of the terminal device or the relative identification of the terminal device in the group to which it belongs, the specified terminal device performs channel occupancy feedback on the corresponding feedback resource. Specifically, reference may be made to case 1 above, which is brevity and will not be described again here.

470. According to the automatic competition mechanism, determine whether it can feedback the channel occupation notification on behalf of the terminal device group.

When there is no relative identification of the terminal equipment in the group to which the DCI belongs, the terminal equipment in the specified terminal equipment group can judge whether it can feedback the channel occupation notification on behalf of the terminal equipment group according to the automatic competition mechanism. Specifically, reference may be made to Case 2 above, which is brevity and will not be described again here.

Based on the above technical solution, when the network device notifies the terminal device of feedback of channel occupation information, the terminal device can be grouped first, and the terminal device group corresponds to the group identifier one by one. Each terminal device group includes multiple terminal devices. Alternatively, when there is only one terminal device group, the group identifier may be a relative identifier of the terminal device in the entire terminal device group. In other words, the first indication information may directly include a relative identifier of the terminal device. For example, a group of terminal devices may be a part of all the terminal devices served by the network device, that is, the terminal devices are selected as a group of terminal devices from all the terminal devices according to a certain criterion. For example, this part of the terminal equipment is a terminal equipment selected to perform communication on an unlicensed spectrum according to a communication capability, wherein the communication capability is whether it supports a capability of transmitting data in an unlicensed spectrum or has an LBT capability. The above communication capabilities can be reported by the terminal device to the network device, so the network device relatively identifies the terminal devices based on the reported information. When the terminal device is notified to perform feedback on the channel occupation duration, the group identification can be based on the foregoing group identification, thereby avoiding the waste of resources caused by the need to identify each terminal device. In addition, in the terminal device group, some terminal devices can be selected to perform feedback on behalf of the terminal device group, so that not only can the network device perform correct scheduling processing based on the feedback information, but also reduce the time required to notify the terminal device of the feedback channel occupation time. Resource costs. .

It should be understood that the foregoing is only for easy understanding, and the interaction between the network device and the terminal device is taken as an example to describe in detail the communication method provided in the embodiment of the present application, but this should not constitute any limitation to the present application. For example, the network device that sends the feedback resource information to the terminal device and the network device that receives the feedback information may be the same network device or different network devices, which is not limited in this application.

It should also be understood that FIG. 16 is only for easy understanding, and schematically illustrates the steps performed by the terminal device and the network device, but this does not mean that the terminal device and the network device will perform each step shown in the figure, for example, the terminal The device may perform one of steps 460 and 470 according to whether the terminal device includes an identifier of the terminal device in the group.

The communication method according to the embodiment of the present application has been described in detail above with reference to FIGS. 4 to 16. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to FIGS. 17 to 19.

FIG. 17 is a schematic block diagram of a communication device according to an embodiment of the present application. As shown in FIG. 17, the communication device 500 may include a receiving unit 510 and a sending unit 520.

In a possible design, the communication device 500 may be a network device or a chip configured in the network device.

In a possible implementation manner, the sending unit 520 may be configured to send first instruction information, where the first instruction information includes a group identifier corresponding to a terminal device group, and the first instruction information is used to indicate terminal device feedback. The channel occupation information, wherein the terminal device is a terminal device in the terminal device group corresponding to the group identifier; the receiving unit 510 may be configured to receive feedback information from the terminal device, the feedback information Including information of channel occupation of the terminal device.

Optionally, the first indication information further includes a relative identifier of the terminal device in the terminal device group, wherein the terminal device is a terminal device determined by the network device and needing to feedback information on channel occupation.

Optionally, the sending unit 520 may be further configured to send second indication information, where the second indication information includes a first threshold, and the second indication information is used to instruct the terminal device to determine according to the first threshold. Whether to feed back channel occupation information.

Optionally, there is a correspondence relationship between the group identifier and the feedback resource; or, there is a correspondence relationship between the position information of the group identifier in the first indication information and the feedback resource; wherein the feedback resource includes the feedback resource Resources used by the terminal device to feed back channel occupied information.

Optionally, there is a corresponding relationship between the relative identifier and the feedback sub-resource; or, there is a corresponding relationship between the relative identifier and the feedback sub-resource; or, the position information of the relative identifier in the first indication information and the feedback sub-resource A corresponding relationship; or a relative relationship between the location information in the first indication information and a feedback resource; wherein the relative identifier is a relative identifier of the terminal device in the terminal device group, The feedback resource includes a resource used by the terminal device to feedback information occupied by a channel, and the feedback sub-resource is a resource used by the terminal device to feedback information occupied by a channel.

Optionally, the first indication information further includes information on channel occupation of the network device.

Optionally, the channel occupation information of the network device includes time duration information of the channel occupation, and / or, as information of the channel occupation by the transmitting end or the receiving end.

Optionally, the channel occupancy information of the terminal device includes duration information of the channel occupancy, and / or, as information on the channel occupied by the transmitting end or the receiving end.

Optionally, the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels PDCCH.

Specifically, the communication device 500 may correspond to the network device in the communication method 200 and method 400 according to the embodiment of the present application. The communication device 500 may include a network for performing the communication method 200 in FIG. 4 and the method 400 in FIG. 16. A module of methods executed by the device. In addition, each module in the communication device 500 and the other operations and / or functions described above are used to implement the corresponding processes of the communication method 200 in FIG. 4 and the method 400 in FIG. 16. Specifically, the receiving unit 510 is used in the method 200. Step 220, steps 460 and 470 in the method 400. The sending unit 520 is configured to perform step 210 in the method 200 and steps 410, 430, and 440 in the method 400. The specific process of each unit performing the corresponding steps is described in method 200, The method 400 has been described in detail. For brevity, it will not be repeated here.

In another possible design, the communication device 500 may be a terminal device or a chip configured in the terminal device.

In a possible implementation manner, the receiving unit 510 may be configured to receive first indication information from a network device, where the first indication information includes a group identifier corresponding to a terminal device group, and the first indication information is used to indicate The terminal device feeds back channel occupation information, wherein the terminal device is a terminal device in the terminal device group corresponding to the group identifier; and the sending unit 520 may be configured to send feedback information to the network device, The feedback information includes information on channel occupation of the terminal device.

Optionally, the first indication information further includes a relative identifier of the terminal device in the terminal device group, wherein the terminal device is a terminal device determined by the network device and needing to feedback information on channel occupation.

Optionally, the apparatus 500 further includes a determining unit 530, which is configured to determine, according to the first threshold and the group identifier, whether to feedback the information occupied by the channel.

Optionally, the determining unit 530 may be further configured to determine a resource used by the information occupied by the feedback channel according to a first correspondence relationship, where the first correspondence relationship is a correspondence relationship between the group identifier and the feedback resource, Or, the corresponding relationship between the position information of the group identifier in the first indication information and a feedback resource, wherein the feedback resource includes a resource used by the terminal device for information occupied by a feedback channel.

Optionally, the determining unit 530 may be further configured to determine a resource used by the information occupied by the feedback channel according to a second correspondence relationship, where the second correspondence relationship is a correspondence relationship between a relative identifier and a feedback sub-resource, or A corresponding relationship between the position information of the relative identifier in the first instruction information and the feedback sub-resource, or a corresponding relationship between the relative identifier and the feedback resource, or a relative identifier in the first instruction information Correspondence between location information and feedback sub-resources, wherein the relative identifier is a relative identifier of the terminal device in the terminal device group, and the feedback resource includes information used by the terminal device for feedback channel occupation The feedback sub-resource is a resource used by the terminal device to feedback information occupied by a channel.

Optionally, the first indication information further includes information on channel occupation of the network device.

Optionally, the channel occupancy information of the terminal device includes duration information of the channel occupancy, and / or, as information on the channel occupied by the transmitting end or the receiving end.

Optionally, the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels PDCCH.

Specifically, the communication device 500 may correspond to the terminal device in the communication method 200 and method 400 according to the embodiment of the present application. The communication device 500 may include a device for performing the communication method 200 in FIG. 4 and the method 400 in FIG. 16. A module of a method performed by a terminal device. In addition, each module in the communication device 500 and the other operations and / or functions described above are used to implement the corresponding processes of the communication method 200 in FIG. 4 and the method 400 in FIG. 16. Specifically, the receiving unit 510 is used in the method 200. In step 210, the sending unit 520 is used in step 220 in the method 200, and the determination unit 530 is used in steps 450, 460, and 470 in the method 400. The specific process for each unit to perform the corresponding steps is described in the method 200 and the method 400. Detailed description, for the sake of brevity, will not repeat them here.

FIG. 18 is a schematic structural diagram of a terminal device 600 according to an embodiment of the present application. As shown in FIG. 18, the terminal device 600 includes a processor 601 and a transceiver 602. Optionally, the terminal device 600 further includes a memory 603. Among them, the processor 602, the transceiver 602, and the memory 603 communicate with each other through an internal connection path, and transfer control and / or data signals. The memory 603 is used to store a computer program, and the processor 601 is used to receive the data from the memory 603. The computer program is called and run to control the transceiver 602 to send and receive signals.

The processor 601 and the memory 603 may be combined into a processing device 604, and the processor 601 is configured to execute program codes stored in the memory 603 to implement the foregoing functions. In specific implementation, the memory 603 may also be integrated in the processor 601 or independent of the processor 601. The above-mentioned terminal device 600 may further include an antenna 610 for sending uplink data or uplink control signaling output by the transceiver 602 through a wireless signal.

Specifically, the terminal device 600 may correspond to the terminal device in the communication method 200 and method 400 according to the embodiment of the present application. The terminal device 600 may include a terminal device for performing the communication method 200 in FIG. 4 and the method 400 in FIG. 16. The modules of the executed method, and each module in the terminal device 600 and the other operations and / or functions mentioned above are respectively to implement the corresponding processes of the communication method 200 in FIG. 4 and the method 400 in FIG. 16. Specifically, the memory 603 is configured to store program code, so that when the processor 601 executes the program code, step 450 in method 400 is executed, and the transceiver 602 is controlled to execute step 210 or step 220 in method 200, and each module executes The specific processes of the above corresponding steps have been described in detail in the method 200 and the method 400, and for the sake of brevity, they will not be repeated here.

The foregoing processor 601 may be configured to perform the actions implemented in the terminal described in the foregoing method embodiments, and the transceiver 602 may be configured to perform the actions described in the foregoing method embodiments of the terminal transmitting or sending to the network device. For details, refer to the description in the foregoing method embodiment, and details are not described herein again.

The processor 601 and the memory 603 may be integrated into one processing device, and the processor 601 is configured to execute program codes stored in the memory 603 to implement the foregoing functions. In specific implementation, the memory 603 may also be integrated in the processor 601.

The above-mentioned terminal device 600 may further include a power source 605 for supplying power to various devices or circuits in the terminal.

In addition, in order to make the functions of the terminal device more perfect, the terminal device 600 may further include one or more of an input unit 614, a display unit 616, an audio circuit 618, a camera 620, and a sensor 622, and the audio circuit It may also include a speaker 6182, a microphone 6184, and the like.

FIG. 19 is a schematic structural diagram of a network device 700 according to an embodiment of the present application. As shown in FIG. 19, the network device 700 includes a processor 710 and a transceiver 720. Optionally, the network device 700 further includes a memory 730. The processor 710, the transceiver 720, and the memory 730 communicate with each other through an internal connection path, and transfer control and / or data signals. The memory 730 is used to store a computer program, and the processor 710 is used to call from the memory 730. The computer program is run to control the transceiver 720 to send and receive signals.

The processor 710 and the memory 730 may be combined into a processing device, and the processor 710 is configured to execute program codes stored in the memory 730 to implement the foregoing functions. In specific implementation, the memory 730 may also be integrated in the processor 710, or be independent of the processor 710.

The above network device may further include an antenna 740 for sending downlink data or downlink control signaling output by the transceiver 720 through a wireless signal.

Specifically, the network device 700 may correspond to the network device in the communication method 200 and method 400 according to the embodiment of the present application. The network device 700 may include a network for performing the communication method 200 in FIG. 4 and the method 400 in FIG. 16. A module of methods executed by the device. In addition, each module in the network device 700 and the other operations and / or functions described above are respectively used to implement the corresponding processes of the communication method 200 in FIG. 4 and the method 400 in FIG. 16. Specifically, the memory 730 is configured to store program code, so that when the processor 710 executes the program code, the processor 710 executes 420 in method 400, and controls the transceiver 720 to execute step 210 or step 220, method 200 in method 200 through the antenna 740. Steps 410, 430, and 440 in 400. The specific process of each module performing the corresponding steps is described in detail in method 200 and method 400. For brevity, details are not described herein again.

It should be understood that, in the embodiment of the present application, the processor may be a central processing unit (CPU), and the processor may also be another general-purpose processor, digital signal processor (DSP), or special-purpose integration. Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

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. Among them, the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrical memory Erase programmable read-only memory (EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access Access memory (synchronous DRAM (SDRAM)), double data rate synchronous dynamic random access memory (double SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access Fetch memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct RAMbus RAM, DR RAM).

According to the method provided in the embodiments of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer executes the operations shown in FIG. 4 to FIG. 16 The method in the examples is shown.

According to the method provided in the embodiment of the present application, the present application further provides a computer-readable medium, the computer-readable interpretation stores program code, and when the program code runs on the computer, the computer executes The method in the examples is shown.

According to the method provided in the embodiment of the present application, the present application further provides a system, which includes the foregoing network device and one or more terminal devices. The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center through a cable (Such as infrared, wireless, microwave, etc.) to another website, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like, including one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by 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 technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic. 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 implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

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, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

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

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .

The above is only a specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (23)

A communication method, comprising: The network device sends first instruction information, where the first instruction information includes a group identifier corresponding to a terminal device group, and the first instruction information is used to instruct the terminal device to feedback information on channel occupation, wherein the terminal device Terminal devices in the terminal device group corresponding to the group identifier; The network device receives feedback information from the terminal device, and the feedback information includes information on channel occupation of the terminal device. The method according to claim 1, wherein the first indication information further comprises a relative identifier of the terminal device in the terminal device group, wherein the terminal device determines a need determined by the network device Terminal equipment that feeds back channel occupation information. The method according to claim 1, wherein before the network device receives feedback information from the terminal device, the method comprises: The network device sends second indication information, where the second indication information includes a first threshold, and the second indication information is used to instruct the terminal device to determine whether to feedback information of channel occupation according to the first threshold. The method according to any one of claims 1 to 3, wherein There is a corresponding relationship between the group identifier and the feedback resource; or, The group identifier has a correspondence relationship between the position information in the first indication information and a feedback resource; The feedback resource includes resources used by the terminal device to feedback information occupied by a channel. The method according to any one of claims 1 to 4, characterized in that: There is a corresponding relationship between the relative identifier and the feedback sub-resource; or, There is a correspondence between the relative identifier and the feedback resource; or, The relative identifier has a corresponding relationship between the position information in the first indication information and the feedback sub-resource; or, The relative identifier has a corresponding relationship between the position information in the first indication information and the feedback resource; The relative identifier is a relative identifier of the terminal device in the terminal device group, the feedback resource includes a resource used by the terminal device to feedback information occupied by a channel, and the feedback sub-resource is the terminal The resource used by the device to feedback the information occupied by the channel. The method according to any one of claims 1 to 5, wherein the first indication information further includes information on channel occupation of the network device. The method according to any one of claims 1 to 6, wherein the channel occupancy information of the terminal device includes time duration information of the channel occupancy, and / or, is used as information of a channel occupied by a transmitting end or a receiving end. The method according to any one of claims 1 to 7, wherein the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels (PDCCH). A communication method, comprising: The terminal device receives first instruction information from a network device, where the first instruction information includes a group identifier corresponding to a terminal device group, and the first instruction information is used to indicate the terminal device feedback channel occupation information, where The terminal device is a terminal device in the terminal device group corresponding to the group identifier; The terminal device sends feedback information to the network device, and the feedback information includes information on channel occupation of the terminal device. The method according to claim 9, wherein the first indication information further comprises a relative identifier of the terminal device in the terminal device group, wherein the terminal device determines a need for the network device Terminal equipment that feeds back channel occupation information. The method according to claim 9, wherein before the terminal device sends feedback information to the network device, the method comprises: The terminal device determines whether to feedback the information occupied by the channel according to the first threshold and the group identifier. The method according to any one of claims 9 to 11, wherein the method further comprises: The terminal device determines a resource used by the information occupied by the feedback channel according to a first correspondence relationship, where the first correspondence relationship is: a correspondence relationship between the group identifier and the feedback resource, or the group identifier is in the The correspondence between the position information in the first indication information and the feedback resource, The feedback resource includes resources used by the terminal device to feedback information occupied by a channel. The method according to any one of claims 9 to 12, further comprising: Determining, by the terminal device, resources used for the information occupied by the feedback channel according to a second correspondence relationship, where the second correspondence relationship is: a correspondence relationship between a relative identifier and a feedback sub-resource, or the relative identifier is in the first indication The corresponding relationship between the position information in the information and the feedback sub-resource, or the corresponding relationship between the relative identification and the feedback resource, or the relative identification between the position information in the first indication information and the feedback sub-resource Correspondence, The relative identifier is a relative identifier of the terminal device in the terminal device group, the feedback resource includes a resource used by the terminal device to feedback information occupied by a channel, and the feedback sub-resource is the terminal The resource used by the device to feedback the information occupied by the channel. The method according to any one of claims 9 to 13, wherein the first indication information further includes information on channel occupation of the network device. The method according to any one of claims 9 to 14, wherein the channel occupancy information of the terminal device includes time duration information of the channel occupancy, and / or, is used as information of a channel occupied by a transmitting end or a receiving end. The method according to any one of claims 9 to 15, wherein the first indication information is physical layer signaling, and the physical layer signaling is sent through a group of physical downlink control channels (PDCCH). A communication device, comprising: A processor, configured to be coupled to the memory and execute instructions in the memory to implement the method according to any one of claims 1 to 8. A communication device, comprising: A processor, configured to be coupled to the memory and execute instructions in the memory to implement the method according to any one of claims 9 to 16. The device according to claim 17 or 18, further comprising: The memory. A computer-readable medium, comprising a computer program, which, when the computer program runs on a computer, causes the computer to perform the method according to any one of claims 1 to 16. A computer program product, comprising a computer program that, when the computer program runs on a computer, causes the computer to perform the method according to any one of claims 1 to 16. A chip is characterized in that it includes: Memory for storing computer programs; A processor for calling and running the computer program from the memory, so that the communication device on which the chip system is installed executes the method according to any one of claims 1 to 16. A communication system, comprising the communication device according to claim 18 and / or the communication device according to claim 19.

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