WO2023109572A1

WO2023109572A1 - Configuration method and apparatus

Info

Publication number: WO2023109572A1
Application number: PCT/CN2022/136846
Authority: WO
Inventors: 吴昊; 彭文杰
Original assignee: 华为技术有限公司
Priority date: 2021-12-13
Filing date: 2022-12-06
Publication date: 2023-06-22
Also published as: CN116264673A

Abstract

Provided in the present application are a listen-before-talk configuration method and apparatus for a sidelink in an unlicensed spectrum scenario In the present application, a first communication device receives first listen-before-talk configuration information from a first network device, and the first communication device performs listen-before-talk on a first physical channel of a sidelink on the basis of the first listen-before-talk configuration information; and the first communication device receives second listen-before-talk configuration information from a second communication device, and the first communication device performs listen-before-talk on a second physical channel of the sidelink on the basis of the second listen-before-talk configuration information, wherein the sidelink is a communication link between the first communication device and the second communication device; and the first physical channel and the second physical channel are different physical channels of the sidelink.

Description

A configuration method and device

This application claims the priority of the Chinese patent application with the application number 202111522859.5 and the application title "A Configuration Method and Device" submitted to the China Patent Office on December 13, 2021, the entire contents of which are incorporated in this application by reference. This application claims the priority of the Chinese patent application with the application number 202211196759.2 and the application title "A Configuration Method and Device" filed with the China Patent Office on September 29, 2022, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of communications, and in particular to a configuration method and device in a sidelink unlicensed spectrum scenario.

Background technique

Unlicensed spectrum is currently a spectrum resource that can be used for free. As long as it meets regulatory requirements such as occupied bandwidth and transmit power, it can be used without authorization. Therefore, the unlicensed spectrum can be used as a supplement to the licensed spectrum to improve coverage and spectrum efficiency.

Vehicle to Everything (V2X) is one of the fields with the most industrial potential and the clearest demand in the Internet of Things system. It has the characteristics of wide application space, great industrial potential, and strong social benefits. The Internet of Vehicles collects vehicle information through on-board sensors, on-board terminals and other equipment, and realizes the communication between vehicles and vehicles, between vehicles and people, between vehicles and roadside infrastructure, and between vehicles and networks through V2X communication technology. The Internet of Vehicles will become the basic component of the intelligent transportation system in the future. A communication link between user equipment (UE) in V2X is defined as a sidelink.

V2X can use unlicensed spectrum to improve coverage and spectrum efficiency, but since unlicensed spectrum is adopted by various communication technologies, such as Wireless Fidelity (Wireless Fidelity, WiFi), Bluetooth, NR, etc., how to use unlicensed spectrum in sidelink Achieving reliable communication is an urgent problem to be solved.

Contents of the invention

The present application provides a method and device for configuring a sidelink listen-before-talk LBT in an unlicensed spectrum scenario.

In the first aspect, the embodiment of the present application provides a configuration method, including: the first communication device receives the first listen-before-talk LBT configuration information from the first network device, and the first communication device is based on the first LBT configuration information performing LBT on the first physical channel of the sidelink; the first communication device receives second LBT configuration information from the second communication device, and the first communication device performs LBT on the first physical channel of the sidelink based on the second LBT configuration information Perform LBT on two physical channels; or the first communication device receives third listen-before-talk LBT configuration information from the first network device, and the first communication device configures the third LBT configuration information of the sidelink based on the third LBT configuration information Two physical channels perform LBT; the side link is a communication link between the first communication device and the second communication device; the first physical channel and the second physical channel are different physical channels of the side link.

According to the configuration method provided in the embodiment of this application, the first communication device can perform LBT on different channels of the sidelink based on the different LBT configuration information from the first network device and the second communication device, thereby improving the performance of the first communication device. Reliability of communication with the second communication device using an unlicensed spectrum for the sidelink.

With reference to the first aspect, in some implementations of the first aspect, the first LBT configuration information includes channel access mode information corresponding to the first physical channel, one of channel access configuration information or channel access type information, or Multiple.

With reference to the first aspect, in some implementations of the first aspect, the second LBT configuration information includes channel access mode information corresponding to the second physical channel, channel access configuration information and channel access type information one or more.

With reference to the first aspect, in some implementations of the first aspect, the third LBT configuration information includes channel access mode information corresponding to the second physical channel, channel access configuration information, and the channel in the third LBT configuration information The access mode and channel access configuration information are different from the channel access mode and channel access configuration in the first LBT configuration information.

With reference to the first aspect, in some embodiments of the first aspect, the first physical channel includes a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH or a physical sidelink broadcast channel PSBCH one or more.

With reference to the first aspect, in some implementation manners of the first aspect, the second physical channel includes a physical sidelink feedback channel PSFCH.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication device receives channel access priority information of LBT of PSFCH from the second communication device.

With reference to the first aspect, in some implementations of the first aspect, the first communication device receives third configuration information from the first network device, and the first communication device performs continuous configuration on the first physical channel based on the third configuration information. LBT failure recovery: the first communication device receives fourth configuration information from the second communication device, and the first communication device performs continuous LBT failure recovery on the second physical channel based on the fourth configuration information.

With reference to the first aspect, in some implementation manners of the first aspect, the third configuration information includes a maximum number of failures and a length of a failure detection timer corresponding to the first physical channel.

With reference to the first aspect, in some implementation manners of the first aspect, the fourth configuration information includes a maximum number of failures and a length of a failure detection timer corresponding to the second physical channel.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication device sets a first counter, and the first counter is used to record the number of consecutive LBT failures of the first physical channel.

With reference to the first aspect, in some implementations of the first aspect, the first communication device sets a second counter, and the second counter is used to record the number of consecutive LBT failures of all physical channels in the second physical channel; or the The first communication device sets a second counter, the second counter is used to record the number of consecutive LBT failures of the first part of the physical channels in the second physical channel, the first part of the physical channels is determined by the second communication device; the first The communication device sets a third counter, and the third counter is used to record the number of consecutive LBT failures of the second part of the physical channel of the second physical channel, the second part of the physical channel is determined by the first communication device, and the second part of the physical channel is determined by the first communication device. The two physical channels include the first part of physical channels and the second part of physical channels. .

With reference to the first aspect, in some implementations of the first aspect, the first communication device sends first continuous LBT failure indication information to the first network device, and the first continuous LBT failure indication information is used to indicate that the first physical channel Related continuous LBT failure information, the first continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.

With reference to the first aspect, in some implementations of the first aspect, the first communication device sends second continuous LBT failure indication information to the second communication device, and the second continuous LBT failure indication information is used to indicate that the second physical channel Related continuous LBT failure information, the second continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.

In the second aspect, the embodiment of the present application provides a configuration method, including: the second communication device sends the second listen-before-talk LBT configuration information to the first communication device, and the second LBT configuration information is used for the sidelink link or, the first network device sends third listen-before-talk LBT configuration information to the first communication device, where the third LBT configuration information is used to perform LBT on the second physical channel of the sidelink LBT: the sidelink is a communication link between the first communication device and the second communication device.

With reference to the second aspect, in some implementations of the second aspect, the second LBT configuration information includes channel access mode information corresponding to the second physical channel, one of channel access configuration information or channel access type information, or Multiple.

With reference to the second aspect, in some implementations of the second aspect, the third LBT configuration information includes one or more of channel access mode information and channel access configuration information corresponding to the first physical channel; The channel access mode and channel access configuration information in the third LBT configuration information are different from the channel access mode and channel access configuration information in the first LBT configuration information.

With reference to the second aspect, in some implementation manners of the second aspect, the second physical channel includes a physical sidelink feedback channel PSFCH.

With reference to the second aspect, in some implementation manners of the second aspect, the second communication device sends channel access priority information of the LBT of the PSFCH to the first communication device.

With reference to the second aspect, in some implementations of the second aspect, the second communication device sends fourth configuration information to the first communication device, where the fourth configuration information is used to perform continuous LBT failure recovery on the second physical channel;

With reference to the second aspect, in some implementation manners of the second aspect, the fourth configuration information includes the maximum number of failures and the length of the failure detection timer corresponding to the second physical channel.

With reference to the second aspect, in some implementation manners of the second aspect, the second communication device receives second continuous LBT failure indication information from the first communication device, and the second continuous LBT failure indication information is used to indicate The continuous LBT failure information related to the second physical channel, the second continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.

In the third aspect, the embodiment of the present application provides a configuration method, including: the first network device sends the first listen-before-talk LBT configuration information to the first communication device, and the first LBT configuration information is used for the sidelink performing LBT on the first physical channel; the sidelink is a communication link between the first communication device and the second communication device.

With reference to the third aspect, in some implementations of the third aspect, the first LBT configuration information includes channel access mode information corresponding to the first physical channel, one of channel access configuration information or channel access type information, or Multiple.

With reference to the third aspect, in some embodiments of the third aspect, the first physical channel includes a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH or a physical sidelink broadcast channel PSBCH one or more.

With reference to the third aspect, in some implementation manners of the third aspect, the first network device sends third configuration information to the first communication device, where the third configuration information is used to perform continuous LBT failure on the first physical channel recover.

With reference to the third aspect, in some implementation manners of the third aspect, the third configuration information includes the maximum number of failures and the length of the failure detection timer corresponding to the first physical channel.

With reference to the third aspect, in some implementation manners of the third aspect, the first network device receives first continuous LBT failure indication information from the first communication device, and the first continuous LBT failure indication information is used to indicate the first The continuous LBT failure information related to the physical channel, the first continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.

In a fourth aspect, the embodiment of the present application provides a configuration method, including: the first communication device sends the first continuous LBT failure indication information to the first network device, and the first continuous LBT failure indication information is used to indicate the first The continuous LBT failure information related to the physical channel, the first continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the first physical channel. The first communication device sends second continuous LBT failure indication information to the second communication device, the second continuous LBT failure indication information is used to indicate continuous LBT failure information related to the second physical channel, the second continuous LBT failure indication information Contains the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.

With reference to the fourth aspect, in some embodiments of the fourth aspect, the first physical channel includes a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH or a physical sidelink broadcast channel PSBCH one or more.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the second physical channel includes a physical sidelink feedback channel PSFCH.

In the fifth aspect, the embodiment of the present application provides a communication device, including a module for performing the method described in the first aspect or any possible implementation manner of the first aspect, or implementing the fourth aspect or the fourth aspect A module of the method described in any one of the possible implementations.

In a sixth aspect, the embodiment of the present application provides a communications device, including a module configured to execute the method described in the second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, the embodiment of the present application provides a communication device, including a module configured to execute the method described in the third aspect or any possible implementation manner of the third aspect.

In an eighth aspect, the embodiment of the present application provides a communication device, including a processor and an interface circuit, and the interface circuit is used to receive signals from other devices other than the device and transmit them to the processor or transfer signals from the processor The signal is sent to other devices other than the device, and the processor implements the first aspect or the method described in the possible implementation manners of the first aspect through a logic circuit or executes code instructions, or realizes the second aspect or the first aspect The method described in the possible implementation of the second aspect, or the method described in the third aspect or the possible implementation of the third aspect, or the fourth aspect or the method described in the possible implementation of the fourth aspect Methods.

In the ninth aspect, the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed by a computing device, the first aspect or the first aspect is realized. The method described in a possible implementation of the first aspect, or the method described in the second aspect or a possible implementation of the second aspect, or the third aspect or the method described in a possible implementation of the third aspect method, or implement the fourth aspect or the method described in a possible implementation manner of the fourth aspect.

In a tenth aspect, an embodiment of the present application provides a computer program product, the computer program product includes a computer program or instruction, and when the computer program or instruction is executed by a computing device, the first aspect or a possible implementation of the first aspect is realized The method described in the method, or the method described in the second aspect or the possible implementation of the second aspect, or the third aspect or the method described in the possible implementation of the third aspect, or realize the second aspect The method described in the fourth aspect or possible implementations of the fourth aspect.

In the eleventh aspect, the embodiment of the present application provides a communication system, which includes one or more of the following: the communication device provided in the fifth aspect, the sixth aspect, the seventh aspect or the eighth aspect, A computer-readable storage medium as provided in the ninth aspect, and a computer program product as provided in the tenth aspect.

Description of drawings

FIG. 1 is a schematic structural diagram of a possible communication system in an embodiment of the present application;

FIG. 2 is a schematic flowchart of a possible configuration method in the embodiment of the present application;

Fig. 3a is another schematic flowchart of a possible configuration method in the embodiment of the present application;

Fig. 3b is another schematic flowchart of a possible configuration method in the embodiment of the present application;

FIG. 4 is a schematic block diagram of a possible configuration method in the embodiment of the present application;

FIG. 5 is another schematic flowchart of a possible configuration method in the embodiment of the present application;

FIG. 6 is another schematic flowchart of a possible configuration method in the embodiment of the present application;

Fig. 7a is another schematic flowchart of a possible configuration method in the embodiment of the present application;

Fig. 7b is another schematic flowchart of a possible configuration method in the embodiment of the present application;

FIG. 8 is a schematic block diagram of a possible communication device in the embodiment of the present application;

Fig. 9 is another schematic block diagram of a possible communication device in the embodiment of the present application.

Detailed ways

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

Exemplarily, in order to facilitate understanding of the embodiments of the present application, concepts involved in the embodiments of the present application are described below.

1. Sidelink (sidelink, SL): In a wireless communication system, data communication between UEs can be carried out through the network, or the communication between UEs can be carried out directly without ending the network equipment. The wireless communication link between them is called a sidelink. A typical application scenario of sidelink communication is the Internet of Vehicles. In the Internet of Vehicles, each vehicle can be regarded as a UE, and data transmission between UEs can be performed directly through sidelinks instead of wireless network devices, which can effectively reduce communication delays. Broadcast, unicast, and multicast can be supported on the sidelink.

2. Authorized spectrum: Authorized spectrum is an important resource for mobile communication operators and the cornerstone of current wireless mobile communication to meet the service requirements of coverage, spectrum efficiency and reliability. At present, public mobile communication networks use authorized spectrum, which is allocated or auctioned by the telecommunications or frequency management departments of various countries. Other technologies and networks are not allowed to be used within the authorized spectrum range to ensure the quality and security of mobile networks.

3. Unlicensed spectrum: At present, it is a spectrum resource that can be used for free. As long as it meets the regulatory requirements such as occupied bandwidth and transmission power, it can be used without authorization. For example, WiFi technology uses unlicensed spectrum. The fifth generation (5th generation, 5G) technology working in unlicensed spectrum is New Radio-Unlicense (NR-U).

It should be understood that in the embodiment of the present application, the size of the serial numbers of the processes does not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not constitute the implementation process of the embodiments of the present application. Any restrictions.

It should be understood that in the embodiments of the present application, the numbering of terms is generally for the convenience of distinguishing descriptions, and the numbering does not mean that there is a difference in order or priority of the terms, such as "the first configuration message" and " The "second configuration message", in which "first" and "second" are usually only used to distinguish these two groups of messages, and should not limit the implementation process of the embodiment of the present application.

It should be understood that in the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

It should be understood that in the embodiments of the present application, the terms "system" and "network" are often used interchangeably herein.

It should be understood that in the embodiments of the present application, the term "and/or" is generally used to describe the relationship between related objects, indicating that there may be three relationships, for example, A and/or B may mean: A exists alone , both A and B exist, and B exists alone. It should be understood that the character "/" appearing in the embodiment of the present application generally indicates that the contextual objects are an "or" relationship.

The method and device provided in the embodiments of the present application may be applied in a communication system. FIG. 1 shows a schematic structural diagram of a communication system. FIG. 1 shows a schematic structural diagram of a communication system. The communication system 100 includes one or more network devices (a first network device 110 and a second network device 120 are shown in the figure), and one or more communication devices communicating with the one or more network devices. The first communication device 111 shown in FIG. 1 communicates with the first network device 110 , and the second communication device 121 shown in FIG. 1 communicates with the second network device 120 . The first communication device 111 can also communicate with the second communication device 121, and the communication link between the first communication device 111 and the second communication device 121 is called a side link.

The method and device provided by the embodiments of the present application can be used in various communication systems, such as the fourth generation (4th generation, 4G) communication system, 4.5G communication system, 5G communication system, a system where multiple communication systems are integrated, or future evolution Communication system (such as 5.5G communication system or 6G communication system). Such as long term evolution (long term evolution, LTE) system, new air interface (new radio, NR) system, wireless fidelity (wireless-fidelity, WiFi) system, and the third generation partnership project (3rd generation partnership project, 3GPP) communication systems, etc., and other such communication systems.

The network device in this embodiment of the present application may be any kind of device having a sending and receiving function. The network device can be a device that provides wireless communication function services, and is usually located on the network side, including but not limited to: the next generation base station (gNodeB, gNB) in the fifth generation (5th generation, 5G) communication system, the evolution of the LTE system Node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), transmission reception point (transmission reception point, TRP), transmission point (transmitting point, TP), base transceiver station (base transceiver station, BTS) wait. In a network structure, the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node and a The CU node in the user plane and the RAN device of the DU node. The network equipment provides services for the cell, and the communication device communicates with the base station through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to the base station (for example, a base station), and the cell may belong to A macro base station may also belong to a base station corresponding to a small cell. The small cell here may include: a metro cell, a micro cell, a pico cell, and a femto cell ), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services. The network device can also serve as a device in the V2X communication system that provides wireless communication services for user equipment, a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, a relay station, a vehicle-mounted device, a wearable device, and The specific implementation forms of the network devices and the like in the future evolved network are not limited in this embodiment of the present application.

The communication device (namely the first communication device or the second communication device) in the embodiment of this application is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed On the water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The communication device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a terminal in industrial control, a vehicle user equipment, a terminal in self driving, an auxiliary Terminals in driving, terminals in remote medical, terminals in smart grid, terminals in transportation safety, terminals in smart city, smart home ), terminals in the Internet of Things (Internet of Things, IoT) system, etc. The embodiments of the present application do not limit the application scenarios. In the embodiments of the present application, communication equipment is sometimes referred to as terminal equipment, access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, user equipment, wireless communication equipment, machine terminal, UE agent or UE device, etc. The communication device may be fixed or mobile. As an example but not a limitation, the communication device in this embodiment of the present application may also be a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, or a mixed reality (mixed reality, MR) terminal. VR terminals, AR terminals, and MR terminals can all be referred to as XR terminals. For example, an XR terminal can be a head-mounted device (such as a helmet or glasses), or an all-in-one machine, or a TV, monitor, car, vehicle-mounted device, tablet, smart screen, holographic projector, video player, remote control robot , Tactile Internet terminals, etc. XR terminals can present XR data to users, and users can experience diversified XR services by wearing or using XR terminals. XR terminals can access the network through wireless or wired methods, such as accessing the network through WiFi or 5G systems.

It can be understood that with the evolution of the network, the names of the above-mentioned network elements may change, and the functions of the network elements may also be merged, separated, or even changed, but these changes do not mean departing from the applicable scope of the solution of this application.

Unlicensed spectrum can serve as a supplement to licensed spectrum and play an important role in the communications industry and vertical industries. For unlicensed spectrum, in order to ensure the coexistence of different systems, certain regulatory rules are stipulated, mainly involving the following aspects:

(1) Power and power spectral density level requirements. At present, the maximum transmit power requirement can usually be 23dBm-36dBm, and the maximum average power spectral density can usually be 10mW/MHz.

(2) Maximum channel occupation time. In order to ensure the fair use of different systems, there are also requirements in the regulatory rules for the duration of occupying a channel for data transmission. At present, the maximum channel occupied channel time can usually be 5-40 milliseconds.

(3) The channel occupies bandwidth. The nominal channel bandwidth is the widest frequency band including the channel guard band, and the nominal channel bandwidth is usually at least 5MHz. The occupied channel bandwidth is the bandwidth including 99% of the signal power, and the occupied channel bandwidth for actual data transmission is usually between 80% and 100% of the nominal channel bandwidth.

(4) Channel detection mechanism. In the NR-U cell, various communication devices, such as terminal devices or network devices, can use a listen before talk (LBT) mechanism to compete for use of unlicensed spectrum. The LBT mechanism is the most important channel assessment and access mechanism that NR-U needs to implement. It is the focus of the entire NR-U research and standardization, and it is also the key to whether NR-U can achieve fair coexistence with other systems in the future. Generally, LBT is performed at the granularity of channels (for example, 20M). Before a communication device sends a signal on a certain channel, it may first detect whether the channel is idle, for example, whether it detects that other nearby communication devices are occupying the channel to send signals. When the communication device detects that the channel is idle, the communication device starts to send signaling or data on the channel.

LBT enables multiple users to share a channel. When LBT is turned on, the UE will continuously detect the channel for a period of time until the channel is not used by other devices. When the UE finds that the channel is occupied within a specified period of time, two results can be obtained during the channel access process: the channel access process is completed, that is, LBT is successful, and the channel access process is not completed, that is, LBT fails.

With the rapid development of 5G technology in the world, the demand for wireless networks around the world is growing rapidly. Unlicensed spectrum can be used as a supplement to licensed spectrum deployment, bringing great value to operators.

As one of the fields with the most industrial potential and the clearest market demand in the IoT system, V2X has the characteristics of wide application space, great industrial potential, and strong social benefits. The spectrum range of the sidelink between V2X UEs can also be Use unlicensed spectrum to increase communication coverage. Since the unlicensed spectrum is used by multiple technologies, such as WiFi, Bluetooth, and NR, there is a phenomenon that multiple technologies compete for channels. How to use the unlicensed spectrum to achieve reliable communication in the sidelink is an urgent problem to be solved.

Referring to FIG. 2 , FIG. 2 shows a schematic flowchart of a configuration method 200 provided by an embodiment of the present application. In the flowchart shown in FIG. 2 , the first network device, the first communication device and the second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device. The configuration method 200 includes but not limited to the following steps:

S201 The first communications device receives first listen-before-talk configuration information from the first network device.

When the first communication device and the second communication device communicate using an unlicensed frequency spectrum, the first communication device needs to confirm whether the channel is available before communicating with the second communication device. The first communication device may detect the channel by using the LBT mechanism. Before the first communication device uses the LBT mechanism to detect the channel, the first communication device needs to receive the LBT configuration. First, the first communication device receives the first LBT configuration information from the first network device.

S202 The first communication device performs listen-before-talk on the first physical channel based on the first listen-before-talk configuration information.

The first communication device performs listen before talk on the first physical channel based on the received first LBT configuration information. Wherein the first physical channel is a physical channel of the sidelink between the first communication device and the second communication device. It should be understood that the sidelink has multiple physical channels, and the first physical channel here refers to one or more physical channels of the sidelink, and the number of physical channels is not limited here. S203 The first communication device receives second listen-before-talk configuration information from the second communication device.

The first communication device receives second LBT configuration information from the second communication device.

S204 The first communication device performs listen-before-talk on the second physical channel based on the second listen-before-talk configuration information.

The second communication device performs listen-before-talk on the second physical channel based on the second LBT configuration information. It should be understood that the second physical channel here may be one or more physical channels of the sidelink, and the number of physical channels is not limited here. The first physical channel and the second physical channel are physical channels different from the aforementioned sidelink.

Based on FIG. 2 , please refer to FIG. 3 a , which shows a schematic flowchart of a configuration method 300 a provided by an embodiment of the present application. In the flow chart shown in FIG. 3a a first network device, a first communication device, a second network device and a second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device, and the second communication device can also communicate with the second network device. The configuration method 300a includes but not limited to the following steps:

S301a The first communication device receives first LBT configuration information from the first network device.

Wherein, the first LBT configuration information may include a channel access mode, a channel access configuration, and a channel access type corresponding to the first physical channel.

The channel access mode mainly determines the channel energy monitoring time position of the LBT. For the channel access mode, the specific configuration parameters are dynamic access mode or semi-static access mode. The dynamic access mode means that the LBT failure detection can occur at any time before the data is sent without restriction; the semi-static mode means that the LBT failure detection is periodic and can only occur within a certain period of time in each cycle.

The channel access configuration mainly determines the LBT's judgment on channel occupancy. The specific configuration parameters are the maximum energy detection threshold and the energy detection threshold adjustment value. When the LBT detects that the energy in the channel exceeds the maximum energy detection threshold, the channel is considered to be in an occupied state. The energy detection threshold adjustment value is a compensation value used to adjust the maximum energy detection threshold in different environments, and the detection threshold adjustment value can be a positive number or a negative number.

The channel access type is mainly to determine the monitoring strategy for channel access. For example, if the UE senses that the channel is idle in both listening slots within a detection interval, it considers that the channel is not occupied.

S302a The first communication device performs listen before talk on the first physical channel based on the first LBT configuration information.

The sidelink between the first communication device and the second communication device includes a plurality of physical layer channels, including a physical sidelink control channel (physical sidelink control channel, PSCCH), a physical sidelink shared channel (physical sidelink shared channel, PSSCH), physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH) and physical sidelink feedback channel (physical sidelink feedback channel, PSFCH). The PSCCH is used to transmit the SCI information of stage-1, and is mainly used to control the PSSCH. PSSCH is mainly used to transmit data and SCI information of stage-2. PSBCH is mainly used for synchronization and broadcast channels. PSFCH is newly introduced in NR V2X to support HARQ transmission, and is mainly used to feed back PSSCH transmission data.

The first physical channel includes one or more of the sidelink PSCCH, PSSCH or PSBCH.

The first communication device performs listen-before-talk on one or more of the PSCCH, PSSCH or PSBCH based on the first LBT configuration information.

Optionally, S303a, the second network device sends second listen-before-talk configuration information to the second communication device.

S304a The first communication device receives second listen-before-talk configuration information from the second communication device.

Wherein, the second LBT configuration information may include a channel access mode, a channel access configuration, and a channel access type corresponding to the second physical channel.

The second physical channel includes the PSFCH of the sidelink.

In a possible implementation manner, the channel of the first communication device may receive the access mode and channel access configuration from the second communication device through a sidelink radio resource control (radio resource control, RRC) message.

In a possible implementation manner, the channel of the first communication device may receive the channel access type from the second communication device through sidelink control information (sidelink control information, SCI) of the sidelink.

In a possible implementation manner, the first communication device receives the channel access priority information of the LBT of the PSFCH from the second communication device. A higher channel access priority means that the LBT detection time for the channel is shorter, and the first communication device can perform LBT on the PSFCH according to the channel access priority information.

S305a performs listen-before-talk on the second physical channel based on the second listen-before-talk configuration information. The second communication device performs listen-before-talk on the second physical channel based on the second LBT configuration information. It should be understood that the second physical channel here may be one or more physical channels of the sidelink, for example, the second physical channel may be the PSFCH, and the number of physical channels is not limited in this application. The first physical channel and the second physical channel are different physical channels on the sidelink.

To sum up, when the first communication device communicates with the second communication device using the unlicensed spectrum, PSCCH, PSSCH and PSBCH are performed according to the channel access mode, channel access configuration and channel access type configured by the first network device. LBT. However, the PSFCH channel will perform LBT according to the channel access mode, channel access configuration and channel access type configured by the second communication device. Since the second communication device needs to receive the ACK/NACK information from the first communication device through the PSFCH, the second LBT configuration message from the second communication device better matches the PSFCH channel required by the second communication device.

Referring to FIG. 3b, FIG. 3b shows a schematic flowchart of a configuration method 300b provided by an embodiment of the present application. In the flow chart shown in FIG. 3b a first network device, a first communication device, a second network device and a second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device, and the second communication device can also communicate with the second network device. The configuration method 300b includes but not limited to the following steps:

S301b The first communication device receives the first LBT configuration information and the third LBT configuration information from the first network device.

The third LBT configuration information may include a channel access mode and a channel access configuration corresponding to the second physical channel.

Optionally, the channel access mode and channel access configuration in the third LBT configuration information may be the same as or different from the channel access mode and channel access configuration in the first LBT configuration information.

S302b The first communication device performs listen before talk on the first physical channel based on the first LBT configuration information.

S303b The first communication device receives the channel access type from the second communication device.

The second physical channel includes the PSFCH of the sidelink.

In a possible implementation manner, the channel of the first communication device may receive the channel access type from the second communication device through a sidelink radio resource control (radio resource control, RRC) message.

S304b Based on the third listen-before-talk configuration information and the third listen-before-talk configuration information, perform listen-before-talk on the second physical channel. It should be understood that the second physical channel here may be one or more physical channels of the sidelink, for example, the second physical channel may be the PSFCH, and the number of physical channels is not limited in this application. The first physical channel and the second physical channel are different physical channels on the sidelink.

To sum up, when the first communication device communicates with the second communication device using the unlicensed spectrum, PSCCH, PSSCH and PSBCH are performed according to the channel access mode, channel access configuration and channel access type configured by the first network device. LBT. However, the PSFCH channel will perform LBT according to the channel access mode configured by the first network device, the channel access configuration and the channel access type configured by the second communication device. Exemplarily, as shown in FIG. 4 , FIG. 4 shows a schematic block diagram of a configuration method 400 provided by an embodiment of the present application. FIG. 4 designs a first network device 410 , a first communication device 411 , and a second communication device 421 . The first communication device 411 can communicate with the first network device 410, and the first communication device 411 can also communicate with the second communication device 421 through a side link. When the first communication device 411 sends data or signaling to the second communication device 421 in the unlicensed spectrum, the first communication device needs to receive first listen-before-talk configuration information from the first network device 410, the first first The configuration after listening includes the channel access mode, channel access configuration and channel access type corresponding to PSBCH, PSCCH and PSSCH. The first communication device 411 performs listen-before-talk on the sidelink PSBCH, PSCCH, and PSSCH through the first listen-before-talk configuration information. When the PSCCH meets the requirements, control signaling can be sent on the PSCCH, and when the PSSCH is found to meet the requirements, data or signaling can be sent on the PSSCH. When the first communication device 411 feeds back an acknowledgment (acknowledgment, ACK)/negative acknowledgment (negative acknowledgment, NACK) to the second communication device 421, the first communication device 411 needs to receive the second listen-before-the-second message from the second communication device 421 first. Speaking of configuration information, the second listen-before-talk configuration includes the channel access mode, channel access configuration, and channel access type corresponding to the PSFCH. The first communication device 411 performs listen-before-talk on the PSFCH through the second listen-before-talk configuration information, and when finding that the PSFCH meets requirements, the first communication device 411 may send ACK/NACK information to the second communication device 421 through the PSFCH.

Please refer to FIG. 5 , which shows another schematic flowchart of a configuration method 500 provided by an embodiment of the present application. In the flowchart shown in FIG. 5 , the first network device, the first communication device, the second network device and the second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device, and the second communication device can also communicate with the second network device. The configuration method 500 includes but not limited to the following steps:

S501 The first communication device receives first listen before talk configuration information from the first network device.

Wherein, the first listen-before-talk configuration information includes the channel access mode, channel access configuration and channel access type corresponding to PSBCH, PSSCH or PSCCH, and the channel access mode and channel access configuration corresponding to PSFCH. In other words, the channel access mode and channel access configuration corresponding to the PSFCH are the same as other channels, and both come from the first network device.

Optionally, the channel access mode, channel access configuration and channel access type corresponding to PSBCH, PSSCH or PSCCH may be the same or different, and the channel access mode and channel access configuration corresponding to PSFCH are the same as those of PSBCH, PSSCH and PSCCH The channel access modes and channel access configurations of the channels may be the same or different, which is not limited in this application. However, the channel access mode, channel access configuration and channel access type corresponding to PSBCH, PSSCH and PSCCH and the channel access mode and channel access configuration corresponding to PSFCH all come from the first network device.

S502 The second communication device receives second listen-before-talk configuration information from the second network device.

S503 The first communication device receives second listen-before-talk configuration information from the second communication device.

The second listen-before-talk configuration information includes a channel access type corresponding to the PSFCH. Because the resource scheduling of the PSFCH channel can be considered to be initiated by the peer communication device, the channel access type corresponding to the PSFCH is received from the peer communication device.

S504 The first communication device performs listen-before-talk on the physical channel based on the first and second listen-before-talk configuration information.

Based on the first listen-before-talk configuration, the first communication device can know the channel access mode, channel access configuration and channel access type corresponding to PSBCH, PSSCH or PSCCH, and the channel access mode and channel access configuration corresponding to PSFCH. Based on the second listen-before-talk configuration, the first communication device may know the channel access type corresponding to the PSFCH. Therefore, the first communication device may listen before talking on the PSBCH, PSSCH, PSCCH or PSFCH based on the channel access mode, channel access configuration and channel access type.

Optionally, the configuration granularity of the first listen-before-talk configuration information and the second listen-before-talk configuration information may be a sidelink carrier, or may be a sidelink part bandwidth (bandwidth part, BWP), or Sidelink resource pool. Wherein, one sidelink carrier may include one or more sidelink BWPs, and one sidelink BWP may include one or more resource pools. The first communication device may perform listen-before-talk on the PSBCH, PSSCH, PSCCH or PSFCH based on one or more of the above three configuration granularities.

According to the configuration method provided in the embodiment of the present application, the first communication device can simplify the LBT configuration process of the sidelink, thereby improving the LBT configuration efficiency of the sidelink.

Referring to FIG. 6 , FIG. 6 shows another schematic flowchart of a configuration method 600 provided by an embodiment of the present application. The flow chart shown in FIG. 6 involves the first network device, the first communication device, the second network device and the second communication device. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device, and the second communication device can also communicate with the second network device. The configuration method 600 includes but not limited to the following steps:

S601 The first communication device receives third configuration information from the first network device.

The first communication device receives the third configuration information from the first network device, and the first communication device performs continuous LBT failure recovery on the first physical channel based on the third configuration information, where the first physical channel is PSBCH, PSCCH or PSSCH One or more, the third configuration message includes the maximum number of failures and the length of the failure detection timer corresponding to the first physical channel. Optionally, the first network device may set the third configuration information of the three physical channels PSBCH, PSCCH and PSSCH to the same value, for example, the first network device sets the three physical channels PSBCH, PSCCH and PSSCH to the same maximum The number of failures and the same failure detection timer length. Optionally, the first network device may set the third configuration information of the three physical channels PSBCH, PSCCH and PSSCH to different values, for example, the first network device sets the three physical channels PSBCH, PSCCH and PSSCH to different values Maximum number of failures and different failure detection timer lengths.

S602 The first communications device determines, based on the third configuration information, that the continuous LBT of the first physical channel fails.

After receiving the third configuration information, the first communication device determines that the continuous LBT of the first physical channel fails based on the third configuration information. For example, taking PSSCH as an example, the first communication device uses the unlicensed spectrum to send data to the second communication device on the PSSCH, then the first communication device first needs to perform LBT on the PSSCH, and the third configuration information received by the first communication device is : The maximum number of failures is 10, and the length of the failure detection timer is 1 ms. If the first communication device fails 10 times of LBT on the PSSCH within 1 ms, the first communication device determines that the continuous LBT of the PSSCH fails. When the first communication device determines that the PSSCH continuous LBT fails, the first communication device will not be able to send data to the second communication device through the PSSCH.

In a possible implementation manner, the first communication device sets a first counter, where the first counter is used to record the number of consecutive LBT failures of the first physical channel.

S603 The first communication device sends first continuous LBT failure indication information to the first network device.

When the first communication device determines that the continuous LBT of the first physical channel fails based on the third configuration information, the first communication device sends the first continuous LBT failure indication information to the first network device, so that the first network device takes corresponding recovery measure. The first continuous LBT failure indication information is indication information of continuous LBT failure related to the first physical channel.

In a possible implementation manner, the configuration granularity of the third configuration information may be a sidelink carrier granularity. If the configuration granularity of the third configuration information is carrier granularity, one side link carrier is configured with one third configuration information or the side link LBT failure recovery configuration.

In a possible implementation manner, the configuration granularity of the third configuration information may be the sidelink BWP granularity. If the configuration granularity of the third configuration information is BWP granularity, one side link BWP is configured with one third configuration information or the side link LBT failure recovery configuration.

In a possible implementation manner, the configuration granularity of the third configuration information may be the sidelink resource pool granularity. If the configuration granularity of the third configuration information is the resource pool granularity, one side link resource pool is configured with one third configuration information or the side link LBT failure recovery configuration.

In a possible implementation manner, the first continuous LBT failure indication information includes the carrier ID, BWP ID or resource pool ID of the first physical channel.

S604 The first communication device receives fourth configuration information from the second communication device.

The first communication device receives fourth configuration information from the second communication device, and the first communication device performs continuous LBT failure recovery on the second physical channel based on the fourth configuration information, wherein the second physical channel is PSFCH, and the fourth configuration message includes The maximum number of failures and the length of the failure detection timer corresponding to the second physical channel.

S605 The first communications device determines, based on the fourth configuration information, that continuous LBT of the second physical channel fails.

After receiving the fourth configuration information, the first communication device determines that the continuous LBT of the second physical channel fails based on the fourth configuration information. For example, if the first communication device sends ACK/NACK to the second communication device using the unlicensed spectrum on the PSFCH, the first communication device first needs to perform LBT on the PSFCH, and the fourth configuration information received by the first communication device is: maximum failure The number of times is 10, and the length of the failure detection timer is 1 ms. If the first communication device fails 10 times of LBT on the PSFCH within 1 ms, the first communication device determines that the continuous LBT of the PSFCH fails. When the first communication device determines that the PSSCH continuous LBT fails, the first communication device will not be able to send ACK/NACK to the second communication device through the PSFCH.

In a possible implementation manner, the first communication device sets a second counter, where the second counter is used to record the number of consecutive LBT failures of the second physical channel.

S606 The first communication device sends second continuous LBT failure indication information to the second communication device.

When the first communication device determines that the continuous LBT of the second physical channel fails based on the fourth configuration information, the first communication device sends the second continuous LBT failure indication information to the second communication device, so that the second communication device takes corresponding recovery measure. The second continuous LBT failure indication information is indication information of continuous LBT failure related to two physical channels.

In a possible implementation manner, the configuration granularity of the fourth configuration information may be a sidelink carrier granularity. If the configuration granularity of the fourth configuration information is carrier granularity, one sidelink carrier is configured with one piece of fourth configuration information or sidelink LBT failure recovery configuration.

In a possible implementation manner, the configuration granularity of the fourth configuration information may be the sidelink BWP granularity.

In a possible implementation manner, the configuration granularity of the fourth configuration information may be the sidelink resource pool granularity.

In a possible implementation manner, the second continuous LBT failure indication information includes the carrier ID, BWP ID or resource pool ID of the second physical channel.

Optionally, in S607, the second communication device sends second continuous LBT failure indication information to the second network device.

The second communication device sends the second continuous LBT failure indication information to the second network device, so that the second network device takes corresponding recovery measures.

According to the configuration method provided by the embodiment of the present application, the first communication device can adopt appropriate LBT failure recovery configurations for PSFCH and other physical channels based on the different LBT failure recovery configuration information from the first network device and the second communication device, thereby improving The accuracy of sidelink LBT failure recovery in unlicensed spectrum is improved.

Referring to FIG. 7a, FIG. 7a shows another schematic flowchart of a configuration method 700a provided by an embodiment of the present application. In the flow chart shown in FIG. 7a a first network device, a first communication device and a second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device. The configuration method 700a includes but not limited to the following steps:

S701a The first communications device receives LBT failure recovery configuration information from the first network device.

The first communication device receives LBT failure recovery configuration information from the first network device, and the LBT failure recovery configuration information includes a maximum number of failures and a length of a failure detection timer. The LBT failure recovery configuration information corresponds to one or more of PSBCH, PSCCH, PSSCH or PSFCH, that is, the first communication device can perform LBT on one or more of PSBCH, PSCCH, PSSCH or PSFCH based on the LBT failure recovery configuration information Failed recovery.

S702a The first communications device determines that the first physical channel and the second physical channel have failed consecutive LBTs.

After receiving the LBT failure recovery configuration information, the first communication device will determine that the first physical channel and the second physical channel have consecutive LBT failures based on the LBT failure recovery configuration information. The first physical channel is one or more of PSBCH, PSCCH or PSSCH, and the second physical channel is PSFCH. That is to say, the first physical channel and the second physical channel correspond to the same LBT failure recovery configuration information. For example, taking PSSCH as an example, the first communication device uses the unlicensed spectrum to send data to the second communication device on the PSSCH, then the first communication device first needs to perform LBT on the PSSCH, and the LBT failure recovery configuration information received by the first communication device It is: the maximum number of failures is 10, and the length of the failure detection timer is 1 ms. If the first communication device fails 10 times of LBT on the PSSCH within 1 ms, the first communication device determines that the continuous LBT of the PSSCH fails. When the first communication device determines that the PSSCH continuous LBT fails, the first communication device will not be able to send data to the second communication device through the PSSCH. Similarly, if the first communication device fails to perform LBT on PSFCH 10 times within 1 ms, the first communication device determines that continuous LBT of PSFCH fails.

S703a The first communication device sends the first continuous LBT failure indication information to the first network device.

When the first communication device determines that the continuous LBT failure of the first physical channel based on the LBT failure recovery configuration information, the first communication device sends the first continuous LBT failure indication information to the first network device, so that the first network device takes corresponding actions recovery measures. The first continuous LBT failure indication information is indication information of continuous LBT failure related to the first physical channel.

In a possible implementation manner, the configuration granularity of the LBT failure recovery configuration information may be the sidelink carrier granularity.

In a possible implementation manner, the configuration granularity of the LBT failure recovery configuration information may be the sidelink BWP granularity

In a possible implementation manner, the configuration granularity of the LBT failure recovery configuration information may be the sidelink resource pool granularity.

S704a The first communication device sends second continuous LBT failure indication information to the second communication device.

When the first communication device determines that the continuous LBT failure of the second physical channel based on the LBT failure recovery configuration information, the first communication device sends the second continuous LBT failure indication information to the second communication device, so that the second communication device takes corresponding actions recovery measures. The second continuous LBT failure indication information is indication information of continuous LBT failure related to two physical channels.

According to the configuration method provided in the embodiment of the present application, the first communication device can simplify the configuration process of the continuous LBT failure recovery of the side link, thereby improving the configuration efficiency of the continuous LBT failure recovery of the side link.

Please refer to FIG. 7b, which shows a schematic flowchart of a method 700b for LBT configuration and indication provided by an embodiment of the present application. In the flow chart shown in FIG. 7b a first network device, a first communication device and a second communication device are involved. The first communication device can communicate with the first network device, and in addition, the first communication device can also communicate with the second communication device. The configuration method 700b includes but is not limited to the following steps:

S701b The second communications device sends PSFCH resource location indication information to the first communications device.

The indication information indicates the resource positions of multiple PSFCHs to the first communication device, and the PSFCH resource position information is used for the second user equipment to send the HARQ feedback message to the first user equipment. Optionally, the first user equipment sends the PSSCH to the second communication device, and the second communication device maps out multiple PSFCH resource positions according to the resource position information of the PSSCH.

S702b The first communication device feeds back a HARQ message on the PSFCH resource location information to the second communication device.

S703b The first communication device counts LBT failures according to the configuration information of continuous LBT failure recovery.

The first communication device needs to set a continuous LBT failure counter, and the counter records the number of continuous LBT failures on the PSFCH resources indicated or mapped by the second communication device (ie, multiple PSFCHs determined by the second communication device). When the first communication device feeds back the HARQ message at each PSFCH resource position, it will perform LBT detection. If the LBT detection fails, the LBT failure counter will count once.

S704b Optionally, the first communication device sends continuous LBT failure indication information to the first network device to which it belongs.

When the continuous LBT count of the second communication device reaches the maximum number of continuous LBT failures, it will trigger the sending of the continuous LBT failure indication message. The configuration parameter of the maximum number of consecutive LBT failures may come from the second communication device or from the first network. The configuration of the number of consecutive LBT failures means that the interval between adjacent LBT failures is not greater than the length of one failure detection timer. The failure detection timer length may come from the second communication device or from the first network. Further, optionally, the first communication device sends continuous LBT failure indication information to the second communication device. Optionally, the second communication device sends continuous LBT failure indication information to the second network device to which it belongs.

S705b Feedback is performed by the first communication device on the PSFCH resource position determined by the first communication device.

The condition of this step is that when the first communication device fails LBT at multiple PSFCH resource positions indicated or mapped by the second communication device, resulting in failure to successfully send the HARQ message to the second communication device, it needs to Feedback is performed at the determined PSFCH resource position. Exemplarily, the second communication device will give the first communication device a feedback duration, and the first communication device performs multiple PSFCH feedbacks within the duration. Optionally, the first communication device resets the LBT failure counter.

In a possible implementation manner, the channel access configuration, channel access mode, and channel access type corresponding to the PSFCH determined by the first communication device come from the first network device.

In a possible implementation manner, the channel access configuration, channel access mode, and channel access type corresponding to the PSFCH determined by the first communication device come from the second communication device.

In one possible implementation manner, the channel access configuration and channel access mode corresponding to the PSFCH determined by the first communication device come from the first network device and the channel access type comes from the second communication device.

In one possible implementation manner, the channel access configuration and channel access mode corresponding to the PSFCH determined by the first communication device come from the second communication device and the channel access type comes from the first network device.

S706b The first communication device feeds back the HARQ message on the PSFCH resource location information to the second communication device.

S707b The first communication device enters a new LBT failure counter according to the configuration information of continuous LBT failure recovery.

The first communication device needs to set a new LBT failure counter. The counter records the number of consecutive LBT failures on the PSFCH resource determined by the first communication device (ie, multiple PSFCHs determined by the second communication device). When the first communication device feeds back the HARQ message at each PSFCH resource position on the multiple PSFCH resources determined by the first communication device, LBT detection will be performed. If the LBT test fails, it counts.

S708b The first communication device sends continuous LBT failure indication information to the first network device to which it belongs.

When the continuous LBT count of the first communication device reaches the maximum number of continuous LBT failures, it will trigger the sending of the continuous LBT failure indication message. The configuration parameter of the maximum number of consecutive LBT failures may come from the second communication device or from the first network. The continuous LBT failure means that the interval of LBT failure is not greater than the length of one failure detection timer. The failure detection timer length may come from the second communication device or from the first network. Further, optionally, the first communication device sends continuous LBT failure indication information to the second communication device. Optionally, the second communication device sends continuous LBT failure indication information to the second network device to which it belongs.

Optionally, in S709b, the first communication device sends continuous LBT failure indication information to the second communication device.

Optionally, in S710b, the first communication device sends continuous LBT failure indication information to the second communication device.

FIG. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application. These communication apparatuses can be used to implement the functions of the first communication device in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be the first communication device in the above method embodiment, or may be a module (such as a chip) applied to the above first communication device.

As shown in FIG. 8 , a communication device 800 includes a processing module 810 and a transceiver module 820 . The communication device 800 is configured to realize the functions of the first communication device in the embodiment corresponding to FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b.

When the communication device 800 is used to realize the function of the first communication device in the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b, for example:

The transceiver module 820 is configured to receive the first LBT configuration information from the first network device, and the transceiver module 820 is also configured to receive the second LBT configuration information from the second communication device.

The processing module 810 is configured to perform LBT on the first physical channel of the sidelink based on the first LBT configuration information; the processing module 810 is also configured to perform LBT on the second physical channel of the sidelink based on the second LBT configuration information LBT; wherein, the side link is a communication link between the first communication device and the second communication device; the first physical channel and the second physical channel are different physical channels of the side link.

In an optional manner, the transceiver module 820 is further configured to receive third configuration information from the first network device.

In an optional manner, the transceiving module 820 is further configured to receive fourth configuration information from the second communication device.

In an optional manner, the transceiver module 820 is further configured to send the first continuous LBT failure indication information to the first network device, where the first continuous LBT failure indication information is used to indicate the continuous LBT related to the first physical channel Failure information, the first continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.

In an optional manner, the transceiver module 820 is further configured to send second continuous LBT failure indication information to the second communication device, where the second continuous LBT failure indication information is used to indicate continuous LBT related to the second physical channel Failure information, the second continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.

In an optional manner, the processing module 810 is further configured to perform continuous LBT failure recovery on the first physical channel based on the third configuration information.

In an optional manner, the processing module 810 is further configured to perform continuous LBT failure recovery on the second physical channel based on the fourth configuration information.

In an optional manner, the processing module 810 is further configured to set a first counter, where the first counter is used to record the number of consecutive LBT failures of the first physical channel.

In an optional manner, the processing module 810 is further configured to set a second counter, where the second counter is used to record the number of consecutive LBT failures of the second physical channel.

The above is only a partial example when the communication device 800 is used to realize the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. For the function of the module 820, reference may be made to the operation of the first communication device in the embodiment corresponding to FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b.

The communication apparatus 800 may also be used to implement the functions of the second communication device in the above embodiments corresponding to FIG. 2 , FIG. 3a , FIG. 3b , FIG. 5 , FIG. 6 , FIG. 7a or FIG. 7b .

When the communication device 800 is used to realize the function of the second communication device in the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b, for example:

The transceiver module 820 is configured to send second listen-before-talk LBT configuration information to the first communication device, where the second LBT configuration information is used to perform LBT on the second physical channel of the sidelink; the sidelink is the first A communication link of a communication device with a second communication device.

In an optional manner, the transceiver module 820 is further configured to send fourth configuration information to the first communication device, where the fourth configuration information is used to perform continuous LBT failure recovery on the second physical channel;

In an optional manner, the transceiver module 820 is further configured to receive second continuous LBT failure indication information from the first communication device, where the second continuous LBT failure indication information is used to indicate the second physical channel-related Continuous LBT failure information, the second continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.

The above is only a partial example when the communication device 800 is used to realize the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. For the function of the module 820, reference may be made to the operation of the second communication device in the embodiment corresponding to FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b.

The communication device 800 may also be used to implement the functions of the first network device in the above embodiments corresponding to FIG. 2 , FIG. 3a , FIG. 3b , FIG. 5 , FIG. 6 , FIG. 7a or FIG. 7b .

When the communication device 800 is used to realize the function of the first network device in the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b, for example:

The transceiver module 820 is configured to send the first listen-before-talk LBT configuration information to the first communication device, the first LBT configuration information is used to perform LBT on the first physical channel of the sidelink; the sidelink first communication A communication link of the device with a second communication device.

In an optional manner, the transceiver module 820 sends third configuration information to the first communication device, where the third configuration information is used to perform continuous LBT failure recovery on the first physical channel.

In an optional manner, the transceiver module 820 receives first continuous LBT failure indication information from the first communication device, where the first continuous LBT failure indication information is used to indicate continuous LBT failure information related to the first physical channel , the first continuous LBT failure indication information includes the carrier identification ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.

The above is only a partial example when the communication device 800 is used to realize the method embodiment shown in FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. For the function of the module 820, reference may be made to the operation of the first network device in the embodiment corresponding to FIG. 2, FIG. 3a, FIG. 3b, FIG. 5, FIG. 6, FIG. 7a or FIG. 7b.

FIG. 9 is another schematic block diagram of a communication device provided by an embodiment of the present application. As shown in Figure 9. The communication device 900 includes a processor 910 and an interface circuit 930 . The processor 910 and the interface circuit 930 are coupled to each other. It can be understood that the interface circuit 930 may be a transceiver or an input/output interface.

Optionally, the communication device 900 may further include a memory 920 for storing instructions executed by the processor 920 or storing input data required by the processor 910 to execute the instructions or storing data generated after the processor 910 executes the instructions.

When the communication device 900 is used to implement the first communication device, the second communication device, the first network device or the second network device shown in Fig. 2, Fig. 3a, Fig. 3b, Fig. 5, Fig. 6, Fig. 7a or Fig. 7b In terms of functions, the processor 910 is used to implement the functions of the above-mentioned processing module 810 , and the interface circuit 930 is used to realize the functions of the above-mentioned transceiver module 820 .

Optionally, the communication device 900 further includes a bus 940 , and the processor 910 , the interface circuit 930 and the memory 920 can communicate through the bus 940 .

The embodiment of the present application also provides a system chip, the system chip includes input and output interfaces, at least one processor, at least one memory and a bus, the at least one memory is used to store instructions, and the at least one processor is used to call the at least one Instructions of the memory to perform the operations of the methods of the various aspects described above.

In the embodiment of the present application, it should be noted that the foregoing method embodiments in the embodiment of the present application may be applied to or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

In the foregoing embodiments, all or part may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product may comprise one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be 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 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, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means. 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 or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic disk), an optical medium (such as a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)).

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be 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 illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose 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, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function 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 the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

[Corrected 23.03.2023 under Rule 91]

A configuration method, characterized in that, comprising:

The first communication device receives the first listen-before-talk LBT configuration information from the first network device, and the first communication device performs LBT on the first physical channel of the sidelink based on the first LBT configuration information; the The first communication device receives second LBT configuration information from the second communication device, and the first communication device performs LBT on the second physical channel of the sidelink based on the second LBT configuration information; or

The first communication device receives third listen-before-talk LBT configuration information from the first network device, and the first communication device performs the second physical channel of the sidelink based on the third LBT configuration information LBT; the sidelink is a communication link between the first communication device and the second communication device;

The first physical channel and the second physical channel are different physical channels of the sidelink.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 1, wherein the first LBT configuration information includes channel access mode information corresponding to the first physical channel, one of channel access configuration information or channel access type information, or Multiple.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 1 or 2, wherein the second LBT configuration information includes channel access mode information corresponding to the second physical channel, one of channel access configuration information and channel access type information or more.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 1, further characterized in that the third LBT configuration information includes channel access mode information corresponding to the second physical channel, channel access configuration information, and the third LBT configuration information The channel access mode and channel access configuration information in the LBT configuration information are different from the channel access mode and channel access configuration in the first LBT configuration information.
[Corrected 23.03.2023 under Rule 91]
The method according to any one of claims 1-4, wherein the first physical channel comprises a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH or a physical sidelink broadcast channel One or more of PSBCH.
[Corrected 23.03.2023 under Rule 91]
The method according to any one of claims 1-5, wherein the second physical channel comprises a Physical Sidelink Feedback Channel (PSFCH).
[Corrected 23.03.2023 under Rule 91]

The method according to claim 6, wherein the method further comprises:

The first communication device receives the channel access priority information of the LBT of the PSFCH from the second communication device.
[Corrected 23.03.2023 under Rule 91]

The method according to any one of claims 1-7, wherein the method further comprises:

The first communication device receives third configuration information from the first network device, and the first communication device performs continuous LBT failure recovery on the first physical channel based on the third configuration information;

The first communication device receives fourth configuration information from the second communication device, and the first communication device performs continuous LBT failure recovery on the second physical channel based on the fourth configuration information.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 8, wherein the third configuration information includes the maximum number of failures and the length of a failure detection timer corresponding to the first physical channel.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 8 or 9, wherein the fourth configuration information includes the maximum number of failures and the length of a failure detection timer corresponding to the second physical channel.
[Corrected 23.03.2023 under Rule 91]

According to the method according to any one of claims 1-10, the method further comprises:

The first communication device sets a first counter, and the first counter is used to record the number of consecutive LBT failures of the first physical channel.
[Corrected 23.03.2023 under Rule 91]

According to the method according to any one of claims 1-10, the method further comprises:

The first communication device sets a second counter, and the second counter is used to record the number of consecutive LBT failures of all physical channels in the second physical channel; or

The first communication device sets a second counter, the second counter is used to record the number of consecutive LBT failures of the first part of the physical channels in the second physical channel, and the first part of the physical channels is provided by the second communication device Determined; the first communication device sets a third counter, and the third counter is used to record the number of consecutive LBT failures of the second part of the physical channels of the second physical channel, and the second part of the physical channels is determined by the Determined by the first communication device, the second physical channel includes the first part of physical channels and the second part of physical channels.
[Corrected 23.03.2023 under Rule 91]

According to the method according to any one of claims 1-12, the method further comprises:

The first communication device sends first continuous LBT failure indication information to the first network device, where the first continuous LBT failure indication information is used to indicate continuous LBT failure information related to the first physical channel, and the first The continuous LBT failure indication information includes the carrier ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.
[Corrected 23.03.2023 under Rule 91]

According to the method according to any one of claims 1-12, the method further comprises:

The first communication device sends second continuous LBT failure indication information to the second communication device, where the second continuous LBT failure indication information is used to indicate continuous LBT failure information related to the second physical channel, and the first The two consecutive LBT failure indication information includes the carrier ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.
[Corrected 23.03.2023 under Rule 91]

A configuration method, characterized in that, comprising:

The second communication device sends second listen-before-talk LBT configuration information to the first communication device, where the second LBT configuration information is used to perform LBT on the second physical channel of the sidelink;

The sidelink is a communication link between the first communication device and the second communication device.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 15, wherein the second LBT configuration information includes channel access mode information corresponding to the second physical channel, one of channel access configuration information or channel access type information, or Multiple.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 15 or 16, wherein the second physical channel comprises a physical sidelink feedback channel PSFCH.
[Corrected 23.03.2023 under Rule 91]

The method according to claim 17, further comprising:

The second communication device sends channel access priority information of the LBT of the PSFCH to the first communication device.
[Corrected 23.03.2023 under Rule 91]

The method according to any one of claims 15-18, further comprising:

The second communication device sends fourth configuration information to the first communication device, where the fourth configuration information is used to perform continuous LBT failure recovery on the second physical channel.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 19, wherein the fourth configuration information includes the maximum number of failures and the length of a failure detection timer corresponding to the second physical channel.
[Corrected 23.03.2023 under Rule 91]

The method according to any one of claims 15-20, further comprising:

The second communication device receives second continuous LBT failure indication information from the first communication device, where the second continuous LBT failure indication information is used to indicate continuous LBT failure information related to the second physical channel, the The second continuous LBT failure indication information includes the carrier ID, partial bandwidth BWP ID or resource pool ID of the second physical channel.
[Corrected 23.03.2023 under Rule 91]

A configuration method, characterized in that, comprising:

The first network device sends first listen-before-talk LBT configuration information to the first communication device, where the first LBT configuration information is used to perform LBT on the first physical channel of the sidelink; or

The first network device sends third listen-before-talk LBT configuration information to the first communication device, and the third LBT configuration information is used to perform LBT on the second physical channel of the sidelink; the sidelink The link is a communication link between the first communication device and the second communication device.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 22, wherein the first LBT configuration information includes channel access mode information corresponding to the first physical channel, one of channel access configuration information or channel access type information or Multiple.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 23, wherein the third LBT configuration information includes one or more of channel access mode information corresponding to the first physical channel and channel access configuration information; The channel access mode and channel access configuration information in the third LBT configuration information are different from the channel access mode and channel access configuration information in the first LBT configuration information.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 22 or 23, wherein the first physical channel comprises a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH or a physical sidelink broadcast channel PSBCH one or more.
[Corrected 23.03.2023 under Rule 91]

The method according to any one of claims 22-25, further comprising:

The first network device sends third configuration information to the first communication device, where the third configuration information is used to perform continuous LBT failure recovery on the first physical channel.
[Corrected 23.03.2023 under Rule 91]
The method according to claim 26, wherein the third configuration information includes the maximum number of failures and the length of a failure detection timer corresponding to the first physical channel.
[Corrected 23.03.2023 under Rule 91]

The method according to any one of claims 22-27, further comprising:

The first network device receives first continuous LBT failure indication information from the first communication device, where the first continuous LBT failure indication information is used to indicate continuous LBT failure information related to the first physical channel, and the The first continuous LBT failure indication information includes the carrier ID, partial bandwidth BWP ID or resource pool ID of the first physical channel.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a first communication device, characterized by comprising a module for performing the method according to any one of claims 1-14.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a second communication device, characterized by comprising a module for performing the method according to any one of claims 15-21.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a first network device, characterized by comprising a module for performing the method according to any one of claims 22-28.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a first communication device, characterized in that it includes a processor, the processor is coupled with a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , causing the device to execute the method according to any one of claims 1-14.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a second communication device, characterized in that it includes a processor, the processor is coupled with a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , causing the device to execute the method according to any one of claims 15-21.
[Corrected 23.03.2023 under Rule 91]
A communication device, applied to a first network device, characterized in that it includes a processor, the processor is coupled with a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , causing the device to execute the method according to any one of claims 22-28.
[Corrected 23.03.2023 under Rule 91]
A computer-readable storage medium, wherein a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed by a computing device, any one of claims 1-14 is realized The method, or realize the method described in any one of claims 15-21, or realize the method described in any one of claims 22-28.
[Corrected 23.03.2023 under Rule 91]
A computer program product, the computer program product comprising instructions, characterized in that, when the instructions are executed by a computer device, the method according to any one of claims 1-14 is implemented, or claims 15-21 are implemented The method described in any one of claims 22-28, or implement the method described in any one of claims 22-28.
[Corrected 23.03.2023 under Rule 91]
A communication system, comprising one or more of the following: the communication device according to any one of claims 29-34.