A method and apparatus for sidelink communication

Abstract

The application provides a method and device for improving the resource utilization efficiency of sidelink communication in unlicensed spectrum. The method comprises: receiving indication information, the indication information indicating parameters when a second terminal device performs listen before talk (LBT), and parameters of frequency domain resources actually used by the second terminal device in a first channel occupation time (COT), the first COT being used for communication between the second terminal device and a third terminal device; and occupying a second COT based on the parameters when the second terminal device performs LBT, wherein the frequency domain resources used by the first terminal device in the second COT are frequency domain resources not used by the second terminal device in the first COT, and the second COT is used for communication between the first terminal device and a fourth terminal device. In this way, the first terminal device can use the resources occupied by the second terminal device but not used to communicate with the fourth terminal device, thereby improving the resource utilization rate.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a side-to-side communication method and apparatus. Background Technology

[0002] Enabling sidelink (SL) communication in unlicensed spectrum within a local area is an important direction of evolution. Similar to universal user (Uu) interfaces, terminal devices communicating via SL in unlicensed spectrum also need to coexist with nearby wireless fidelity (Wi-Fi) devices based on a listen-before-talk (LBT) mechanism.

[0003] In SL-U communication, before accessing the channel and starting to send data, a terminal device needs to listen for channel idleness. If the channel has been idle for a certain period, it can occupy the channel; otherwise, it must wait for the channel to become idle before it can occupy it. However, if unlicensed spectrum is occupied solely based on the LBT mechanism, the number of terminal devices communicating using unlicensed spectrum at the same time will be severely limited, resulting in low system throughput. Summary of the Invention

[0004] This application provides a side-to-side communication method and apparatus for improving the resource utilization efficiency of SL-U communication.

[0005] Firstly, this application provides a side-by-side communication method. The execution subject of this method can be a terminal device, a chip, or a circuit. The method includes: receiving indication information from a second terminal device, the indication information indicating: parameters of the second terminal device when performing LBT, parameters of a first frequency domain resource used by the second terminal device, the first frequency domain resource belonging to the frequency domain resource corresponding to a first COT, and the first COT being used for communication between the second terminal device and a third terminal device; occupying a second COT based on the parameters of the second terminal device performing LBT, wherein the second frequency domain resource used by the first terminal device within the second COT belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource, and the second COT being used for communication between the first terminal device and a fourth terminal device.

[0006] When the second terminal device has successfully initialized the first COT based on the LBT mechanism, the channel will be in a non-idle state during the first COT. If the first terminal device performs LBT after the second terminal device has initialized the first COT, it will likely detect that the channel is in a non-idle state, preventing it from performing SL transmission. In this embodiment, the parameters for the second terminal device to perform LBT are indicated by the indication information, enabling the first and second terminal devices to access the channel at the same time, thus avoiding the failure of the other terminal device to compete due to one terminal device performing LBT earlier. Furthermore, the frequency domain information indicated by the indication information ensures that the frequency domain resources used by the first terminal device during its channel occupation do not overlap with those used by the second terminal device during its channel occupation, thereby avoiding resource conflicts. Through the above method, frequency division multiplexing between different terminal devices can be achieved, thereby improving the resource utilization efficiency of the SL-U system and reducing communication latency.

[0007] In one possible design, the indication information may also indicate relevant parameters of the first COT. Therefore, the method may further include determining relevant parameters of the second COT based on the relevant parameters of the first COT. This design better avoids resource conflicts.

[0008] In one possible design, the relevant parameters of the first COT include the bandwidth corresponding to the first COT. The relevant parameters of the second COT include the bandwidth corresponding to the second COT, wherein the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT. This design avoids resource conflicts between the first terminal device and other terminal devices.

[0009] In one possible design, the relevant parameters of the first COT include its time slot allocation structure; the relevant parameters of the second COT include the time domain resources corresponding to the second COT, wherein the time domain resources corresponding to the second COT are within the first type of time domain resources corresponding to the first COT, and the first type of time domain resources are used for the second terminal device to transmit sideline data. This design avoids resource conflicts between the first and second terminal devices.

[0010] In one possible design, the relevant parameters of the first COT include its time slot allocation structure; the relevant parameters of the second COT include its time slot allocation structure, wherein the time slot allocation structure of the second COT can be the same as that of the first COT. This design avoids resource conflicts between the first and second terminal devices.

[0011] In one possible design, within the second COT, the frequency domain resources used by the first terminal device to send data to the fourth terminal device can be the same as the frequency domain resources used by the first terminal device to receive data sent by the fourth terminal device. Through this design, when the time slot allocation structure of the second COT includes time slots for data transmission from the first terminal device to the fourth terminal device and time slots for data transmission from the fourth terminal device to the first terminal device, it can be guaranteed that the frequency domain resources used by the fourth terminal device within the second COT are orthogonal (non-overlapping) to the frequency domain resources used by the second terminal device within the first COT.

[0012] In one possible design, the parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device's LBT, the size of the contention window for the second terminal device's LBT, the counter value for the second terminal device's random backoff, and the priority of the second terminal device's LBT. This design allows the first and second terminal devices to more accurately align their LBTs, improving the accuracy of FDM.

[0013] In one possible design, before receiving the instruction information from the second terminal device, the method further includes: sending a request message to the second terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT; and receiving a response message from the second terminal device, the response message being used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0014] The above design breaks the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. This process eliminates the need for access network devices or terminal devices with centralized scheduling functions within the network; instead, it requires only simple signaling interaction between terminal devices. After the signaling interaction is completed, unlicensed spectrum can be shared. Compared to direct resource scheduling, this method reduces the interaction overhead of scheduling signaling, further improving the resource utilization efficiency of unlicensed spectrum.

[0015] In one possible design, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter indicates the bandwidth of the first terminal device. This design allows the second terminal device to determine, based on the first and second parameters, whether to allow the first terminal device to share unlicensed spectrum resources with the second terminal device.

[0016] In one possible design, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0017] In one possible design, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource within the remaining interleaved resource blocks, which include all interleaved resource blocks in the frequency domain resource corresponding to the first COT except for the first frequency domain resource. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0018] In one possible design, the fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device. With this design, the first terminal device can determine the location of the frequency domain resources it uses.

[0019] Secondly, this application provides a side-by-side communication method. The execution subject of this method can be a terminal device, a chip, or a circuit. The method includes: determining indication information and sending the indication information to a first terminal device. The indication information is used to instruct the first terminal device and a second terminal device to share the frequency domain resources corresponding to a first COT. The first COT is used for communication between the second terminal device and a third terminal device. The indication information indicates: the parameters of the second terminal device when performing Listen-Before-Speak (LBT), and the parameters of the first frequency domain resources used by the second terminal device. The first frequency domain resources belong to the frequency domain resources corresponding to the first COT.

[0020] When the second terminal device has successfully initialized the first COT based on the LBT mechanism, the channel will be in a non-idle state during the first COT. If the first terminal device performs LBT after the second terminal device has initialized the first COT, it will likely detect that the channel is in a non-idle state, preventing it from performing SL transmission. In this embodiment, the parameters for the second terminal device to perform LBT are indicated by the indication information, enabling the first and second terminal devices to access the channel at the same time, thus avoiding the failure of the other terminal device to compete due to one terminal device performing LBT earlier. Furthermore, the frequency domain information indicated by the indication information ensures that the frequency domain resources used by the first terminal device during its channel occupation do not overlap with those used by the second terminal device during its channel occupation, thereby avoiding resource conflicts. Through the above method, frequency division multiplexing between different terminal devices can be achieved, thereby improving the resource utilization efficiency of the SL-U system and reducing communication latency.

[0021] In one possible design, the indication information can also indicate relevant parameters of the first COT. This design allows the first terminal device to determine the relevant parameters of the second COT based on the parameters of the first COT, thereby better avoiding resource conflicts.

[0022] In one possible design, the relevant parameters of the first COT include the bandwidth corresponding to the first COT. This design allows the first terminal device to configure the bandwidth corresponding to the second COT, thereby preventing conflicts between the first terminal device and other terminal devices.

[0023] In one possible design, the relevant parameters of the first COT include its time slot allocation structure. This design allows the first terminal device to configure the time domain resources corresponding to the second COT or the time slot allocation structure of the second COT, thereby avoiding resource conflicts between the first and second terminal devices.

[0024] In one possible design, within the first COT, the frequency domain resources used by the second terminal device to send data to the third terminal device can be the same as the frequency domain resources used by the second terminal device to receive data sent by the third terminal device. Through this design, when the time slot allocation structure of the first COT includes time slots for transmission from the second terminal device to the third terminal device and time slots for transmission from the third terminal device to the second terminal device, it can be guaranteed that the frequency domain resources used by the third terminal device within the first COT are orthogonal (non-overlapping) to the frequency domain resources used by the first terminal device within the second COT.

[0025] In one possible design, the parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device's LBT, the size of the contention window for the second terminal device's LBT, the counter value for the second terminal device's random backoff, and the priority of the second terminal device's LBT. This design allows the first and second terminal devices to more accurately align their LBTs, improving the accuracy of FDM.

[0026] In one possible design, before sending the instruction information to the first terminal device, the method further includes: receiving a request message from the first terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT; determining that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT; and sending a response message to the first terminal device, wherein the response message is used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0027] The above design breaks the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. This process eliminates the need for access network devices or terminal devices with centralized scheduling functions within the network; instead, it requires only simple signaling interaction between terminal devices. After the signaling interaction is completed, unlicensed spectrum can be shared. Compared to direct resource scheduling, this method reduces the interaction overhead of scheduling signaling, further improving the resource utilization efficiency of unlicensed spectrum.

[0028] In one possible design, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter indicates the bandwidth of the first terminal device. When determining whether the first terminal device is allowed to share the frequency domain resource corresponding to the first COT, the decision can be made based on the first parameter and the number of interleaved resource blocks included in the first frequency domain resource; and / or, based on the second parameter and the bandwidth of the second terminal device. This design allows the second terminal device to determine whether to allow the first terminal device to share unlicensed spectrum resources with the second terminal device based on the first parameter and the second parameter.

[0029] In one possible design, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0030] In one possible design, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource within the remaining interleaved resource blocks, which include all interleaved resource blocks in the frequency domain resource corresponding to the first COT except for the first frequency domain resource. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0031] In one possible design, the fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device. With this design, the first terminal device can determine the location of the frequency domain resources it uses.

[0032] Thirdly, this application provides a side-by-side communication method. The execution subject of this method can be a terminal device, a chip, or a circuit. The method includes: sending a request message to a second terminal device, the request message being used to request sharing the frequency domain resources corresponding to a first COT, the first COT being used for communication between the second terminal device and a third terminal device; and receiving a response message from the second terminal device, the response message being used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0033] The above design breaks the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. This process eliminates the need for access network devices or terminal devices with centralized scheduling functions within the network; instead, it requires only simple signaling interaction between terminal devices. After the signaling interaction is completed, unlicensed spectrum can be shared. Compared to direct resource scheduling, this method reduces the interaction overhead of scheduling signaling, further improving the resource utilization efficiency of unlicensed spectrum.

[0034] In one possible design, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resources used by the first terminal device within the second COT. The second parameter indicates the bandwidth of the first terminal device. The second COT is used for communication between the first terminal device and the fourth terminal device. This design allows the second terminal device to determine, based on the first and second parameters, whether to allow the first terminal device to share unlicensed spectrum resources with the second terminal device.

[0035] In one possible design, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device. The location of the second frequency domain resource is within the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource used by the second terminal device. The first frequency domain resource belongs to the frequency domain resource corresponding to the first COT. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0036] In one possible design, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource within the remaining interleaved resource blocks, which include all interleaved resource blocks in the frequency domain resource corresponding to the first COT except for the first frequency domain resource. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0037] In one possible design, the fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device. With this design, the first terminal device can determine the location of the frequency domain resources it uses.

[0038] Fourthly, this application provides a side-channel communication method. The execution subject of this method can be a terminal device, a chip, or a circuit. The method includes: receiving a request message from a first terminal device, the request message being used to request sharing frequency domain resources corresponding to a first COT, the first COT being used for communication between a second terminal device and a third terminal device; determining that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT; and sending a response message to the first terminal device, wherein the response message is used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0039] The above design breaks the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. This process eliminates the need for access network devices or terminal devices with centralized scheduling functions within the network; instead, it requires only simple signaling interaction between terminal devices. After the signaling interaction is completed, unlicensed spectrum can be shared. Compared to direct resource scheduling, this method reduces the interaction overhead of scheduling signaling, further improving the resource utilization efficiency of unlicensed spectrum.

[0040] In one possible design, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resources used by the first terminal device within the second COT; the second parameter indicates the bandwidth of the first terminal device; and the second COT is used for communication between the first terminal device and the fourth terminal device. When determining whether the first terminal device is allowed to share the frequency domain resources corresponding to the first COT, the determination can be made based on the first parameter and the number of interleaved resource blocks included in the first frequency domain resources used by the second terminal device; and / or, based on the second parameter and the bandwidth of the second terminal device, the determination can be made that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT, where the first frequency domain resources belong to the frequency domain resources corresponding to the first COT.

[0041] The above design enables the second terminal device to determine whether to allow the first terminal device and the second terminal device to share unlicensed spectrum resources based on the first parameter and the second parameter.

[0042] In one possible design, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device. The location of the second frequency domain resource is within the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource used by the second terminal device. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0043] In one possible design, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource within the remaining interleaved resource blocks, which include all interleaved resource blocks in the frequency domain resource corresponding to the first COT except for the first frequency domain resource. Through this design, the first terminal device can determine the location of the frequency domain resource it uses.

[0044] In one possible design, the fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device. With this design, the first terminal device can determine the location of the frequency domain resources it uses.

[0045] Fifthly, embodiments of this application provide a communication device capable of implementing the methods described in the first aspect or any possible design thereof, or the third aspect or any possible design thereof, implemented by a first terminal device. The device includes corresponding units or components for performing the described methods. The units included in the device can be implemented in software and / or hardware. The device may, for example, be a first terminal device, or a component, baseband chip, chip system, or processor that supports the implementation of the described methods in the first terminal device.

[0046] For example, the communication device may include modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), etc., which can perform the corresponding functions of the first terminal device in the first aspect or any possible design thereof, or the third aspect or any possible design thereof. When the communication device is a first terminal device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver. The transceiver unit may include an antenna and radio frequency circuits, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component having the functions of the first terminal device described above, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be the input / output interface of the chip system, and the processing unit may be the processor of the chip system, such as a central processing unit (CPU).

[0047] The transceiver unit can be used to perform receiving and / or transmitting actions performed by the first terminal device in the first aspect or any possible design thereof, or in the third aspect or any possible design thereof. The processing unit can be used to perform actions other than receiving and transmitting performed by the first terminal device in the first aspect or any possible design thereof, or in the third aspect or any possible design thereof, such as parameter occupancy of the second COT when performing LBT based on the second terminal device.

[0048] Sixthly, embodiments of this application provide a communication device capable of implementing the methods described in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof, implemented by a second terminal device. The device includes corresponding units or components for performing the described methods. The units included in the device can be implemented in software and / or hardware. The device may, for example, be a second terminal device, or a component, baseband chip, chip system, or processor that supports the implementation of the described methods in the second terminal device.

[0049] For example, the communication device may include modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), etc., which can perform the corresponding functions of the second terminal device in the second aspect or any possible design thereof, or the fourth aspect or any possible design thereof. When the communication device is a second terminal device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver. The transceiver unit may include an antenna and radio frequency circuits, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component with the functions of the second terminal device described above, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be the input / output interface of the chip system, and the processing unit may be the processor of the chip system, such as a central processing unit (CPU).

[0050] The transceiver unit can be used to perform receiving and / or transmitting actions performed by the second terminal device in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof. The processing unit can be used to perform actions other than receiving and transmitting performed by the second terminal device in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof, such as determining indication information, determining whether the first terminal device is allowed to share the frequency domain resources corresponding to the first COT, etc.

[0051] In a seventh aspect, a communication system is provided, which includes the communication devices shown in the fifth and sixth aspects.

[0052] Eighthly, a computer-readable storage medium is provided for storing computer instructions that, when executed on a computer, cause the computer to perform the methods shown in any of the first to fourth aspects or any possible implementation thereof.

[0053] Ninth aspect, a computer program product comprising instructions for storing computer instructions that, when executed on a computer, cause the computer to perform the methods shown in any of the first to fourth aspects or any possible implementation thereof.

[0054] A tenth aspect provides a circuit coupled to a memory, the circuit being used to perform the methods shown in any of the first to fourth aspects or any possible embodiments thereof. The circuit may include a chip circuit. Attached Figure Description

[0055] Figure 1 A schematic diagram of a V2X communication scenario provided in an embodiment of this application;

[0056] Figure 2 This application provides a schematic diagram of an SL-U communication scenario.

[0057] Figure 3 A flowchart illustrating a communication method provided in an embodiment of this application;

[0058] Figure 4 A schematic diagram of a time slot allocation structure for a first COT provided in an embodiment of this application;

[0059] Figure 5 A schematic diagram illustrating an indication of LBT time, provided as an embodiment of this application;

[0060] Figure 6 A schematic diagram illustrating another indication of LBT time provided for an embodiment of this application;

[0061] Figure 7 A schematic diagram illustrating a coordination process provided in an embodiment of this application;

[0062] Figure 8 A schematic diagram of an FDM provided for an embodiment of this application;

[0063] Figure 9 A schematic diagram illustrating a request for sharing provided in an embodiment of this application;

[0064] Figure 10 A schematic diagram illustrating a response sharing method provided in an embodiment of this application;

[0065] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0066] Figure 12 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0068] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0069] 1) Terminal equipment, including equipment that provides voice and / or data connectivity to users, specifically including equipment that provides voice to users, or equipment that provides data connectivity to users, or equipment that provides both voice and data connectivity to users. For example, it may include a handheld device with wireless connectivity or a processing device connected to a wireless modem. This terminal equipment can communicate with the core network via a radio access network (RAN), exchanging voice or data with the RAN, or interacting with the RAN for both voice and data. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle-to-everything (V2X) terminal equipment, machine-to-machine / machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user device, etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal devices, portable, pocket-sized, handheld, or computer-embedded mobile devices, etc. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). It also includes limited devices, such as those with low power consumption, limited storage capacity, or limited computing power. Examples include information sensing devices such as barcode scanners, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.

[0070] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices or smart wearable devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0071] The various terminal devices described above, if located in a vehicle (e.g., placed inside or installed inside a vehicle), can be considered as vehicle-mounted terminal devices, also known as on-board units (OBUs).

[0072] In this embodiment, the terminal device may further include a relay. Alternatively, it can be understood that anything capable of data communication with a base station can be considered a terminal device.

[0073] In this application embodiment, the device for implementing the functions of the terminal device can be the terminal device itself, or it can be a device capable of supporting the terminal device in implementing the functions, such as a chip system, which can be installed in the terminal device. In this application embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. In the technical solutions provided in this application embodiment, the terminal device is used as an example to describe the technical solutions provided in this application embodiment.

[0074] 2) Network devices, including access network (AN) devices such as base stations (e.g., access points), can refer to devices in the access network that communicate with wireless terminal devices over the air interface via one or more cells, or, for example, a roadside unit (RSU) in a V2X technology. A base station can be used to convert received air frames to and from Internet Protocol (IP) packets, acting as a router between the terminal device and the rest of the access network, which may include an IP network. An RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications. Network devices can also coordinate the management of air interface attributes. For example, network equipment may include evolved base stations (NodeB, eNB, or e-NodeB) in long term evolution (LTE) systems or long term evolution-advanced (LTE-A) systems, or may include next-generation node B (gNB) in the 5th generation (5G) NR system (also referred to as NR system), or may include centralized units (CU) and distributed units (DU) in cloud radio access network (Cloud RAN) systems. The embodiments of this application are not limited.

[0075] Network devices may also include core network devices, such as those including access and mobility management functions (AMF). Since this application primarily relates to access networks, unless otherwise specified, the network devices mentioned below refer to access network devices.

[0076] In this application embodiment, the device for implementing the function of the network device can be the network device itself, or it can be a device capable of supporting the network device in implementing that function, such as a chip system, which can be installed in the network device. In the technical solutions provided in this application embodiment, the example of a network device being used to implement the function of the network device is used to describe the technical solutions provided in this application embodiment.

[0077] 3) V2X, or vehicle-to-everything (V2X), is the interconnection between vehicles and the outside world. It is the foundation and key technology for future intelligent vehicles, autonomous driving, and intelligent transportation systems. For example... Figure 1 As shown, V2X specifically includes several application requirements such as direct communication between vehicles (V2V), between vehicles and roadside infrastructure (V2I), between vehicles and pedestrians (V2P), and between vehicles and networks (V2N). V2V refers to communication between vehicles; V2P refers to communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers); V2I refers to communication between vehicles and network devices, such as RSUs; and V2N can also be included in V2I, referring to communication between vehicles and base stations / networks.

[0078] 4) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "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 of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0079] Furthermore, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of multiple objects. For example, the first parameter and the second parameter are only used to distinguish different parameters, and do not indicate that the content, priority, or importance of these two parameters are different.

[0080] The preceding text introduced some terms and concepts involved in the embodiments of this application. The following text introduces the technical features involved in the embodiments of this application.

[0081] In 4G LTE systems, cellular mobile communication standardized unlicensed spectrum, enabling LTE systems to coexist with Wi-Fi devices based on the LBT mechanism, thus enabling LTE Uu interface communication on unlicensed spectrum. In the next-generation 5G NR system, NR Uu interface communication on unlicensed spectrum has been further enhanced, and the related protocol technologies are collectively referred to as NR-U. In addition to the Uu interface mentioned above, there is also a PC5 interface, which is the communication interface between UEs. The transmission link in the PC5 interface is defined as SL. Enabling SL communication on unlicensed spectrum within a local area is an important evolution direction, and the corresponding protocol technologies can be collectively referred to as SL-U. Similar to the Uu interface, UEs operating via SL-U also need to coexist with nearby Wi-Fi devices based on the LBT mechanism.

[0082] The LBT mechanism is essentially a channel access rule. Before accessing a channel and starting to transmit data, a UE needs to listen for channel idleness. If the channel has been idle for a certain period, it can occupy the channel; otherwise, it must wait for the channel to become idle again before it can occupy it. However, if unlicensed spectrum resource allocation is based solely on the LBT mechanism, a network device or UE may be unable to access the channel if its neighboring device has already accessed it, due to the channel not being idle. This severely limits the number of devices that can communicate using unlicensed spectrum simultaneously, resulting in low system throughput. Therefore, improving the resource utilization efficiency of wireless communication systems in unlicensed spectrum based on the LBT mechanism has become a crucial technical issue.

[0083] Frequency division multiplexing (FDM) is a crucial path to improve resource utilization efficiency. Devices within a system suppress mutual interference by using orthogonal frequency domain resources, enabling more devices to access the channel simultaneously and thus improving the utilization efficiency of unlicensed spectrum. However, the SL-U system is a distributed system, potentially involving multiple communication pairs consisting of multiple transmitting UEs and multiple receiving UEs. In this case, if multiple transmitting UEs attempt to access unlicensed spectrum based on their respective LBT mechanisms, the failure of one transmitting UE to start transmitting may prevent other transmitting UEs from accessing the channel due to LBT failure. Therefore, implementing FDM among multiple transmitting UEs in an SL-U system using existing methods is extremely difficult, creating a technical demand for new methods to enable FDM.

[0084] Based on this, embodiments of this application provide a side-by-side communication method and apparatus. In these embodiments, UEs belonging to different communication pairs can coordinate, thereby enabling each UE to rationally allocate the frequency domain resources it will occupy during channel access, thus avoiding mutual interference and improving the resource utilization efficiency of unlicensed spectrum. Furthermore, a UE can align its LBT process according to the instruction information of another UE, thereby accessing the channel using the same time domain resources. The method and apparatus are based on the same inventive concept. Since the principles by which the method and apparatus solve the problem are similar, the implementations of the apparatus and method can be referred to each other, and repeated details will not be repeated.

[0085] The embodiments of this application can be applied to SL-U scenarios. Figure 2 This diagram illustrates a scenario in which an embodiment of this application is used. The scenario includes a sending UE1, a sending UE3, a receiving UE2, and a receiving UE4. Sending UE1 and receiving UE2 form one communication pair, with sending UE1 transmitting data to receiving UE2 via SL-U. Sending UE3 and receiving UE4 form another communication pair, with sending UE3 transmitting data to receiving UE4 via SL-U. It should be noted that receiving UE2 and receiving UE4 can also transmit data to sending UE1 and sending UE3 respectively via SL-U.

[0086] In this scenario, the communication pair consisting of transmitting UE3 and receiving UE4 is the main communication pair within the SL-U system. Transmitting UE3 and receiving UE4 can be described as the second and third terminal devices, respectively. Optionally, the communication service between UE3 and UE4 has a higher priority, or UE3 itself has a higher priority. Therefore, the communication pair consisting of UE3 and UE4 can be the main communication pair within the SL-U system. In the same scenario, the communication pair consisting of transmitting UE1 and receiving UE2 is a communication pair within the SL-U system that wishes to share unlicensed spectrum resources with the aforementioned main communication pair via FDM. Transmitting UE1 and receiving UE2 can be described as the first and fourth terminal devices, respectively. Figure 1 In this example, the transmitting UE3 is a mobile phone, the receiving UE4 is a head-mounted display (HMD), the transmitting UE1 is a smartwatch, and the receiving UE2 is a tablet computer. It should be noted that in real-world applications, multiple communication pairs can be used, such as 3 or 7 pairs. One terminal device can form different communication pairs with multiple terminal devices. In practical applications, each transmitting UE and each receiving UE can be a terminal device of any form.

[0087] Understandably, the sender and receiver can be interchanged; that is, a UE can act as both a sender and a receiver. For example, in a communication pair consisting of UE3 and UE4, when UE3 sends data or signaling to UE4, UE3 acts as the sender and UE4 as the receiver. Conversely, when UE4 sends data or signaling to UE3, UE4 acts as the sender and UE3 as the receiver. Similarly, in a communication pair consisting of UE1 and UE2, when UE1 sends data or signaling to UE2, UE1 acts as the sender and UE2 as the receiver. Conversely, when UE2 sends data or signaling to UE1, UE2 acts as the sender and UE1 as the receiver. Figure 1 Taking UE3 as the sender, UE4 as the receiver, UE1 as the sender, and UE2 as the receiver as an example, the transmission direction is not limited.

[0088] The following is combined Figure 1 The illustrated scenario explains the technical solution provided in the embodiments of this application. See also Figure 3 This is a flowchart illustrating a side-channel communication method provided in this application. The method includes:

[0089] S301, UE3 confirms the indication information.

[0090] The indication information is used to instruct UE3 and UE1 to share the frequency domain resources corresponding to the first COT, which is used for communication between UE3 and UE4. Specifically, the indication information can indicate the parameters used by UE3 to initiate / initiate the first COT. For example, the indication information can indicate the parameters when UE3 performs LBT, so that UE1 can perform LBT according to these parameters, allowing UE1 and UE3 to jointly access the channel at the same time / time period. In addition, the indication information can also indicate the frequency domain resources actually used by UE3 within the first COT. For example, the indication information can indicate the parameters of the first frequency domain resources used by UE3, which belong to the frequency domain resources corresponding to the first COT. Therefore, UE1 can determine the resources in the frequency domain resources corresponding to the first COT that are not used by UE3 according to the indication information.

[0091] It should be noted that the indication information is used to instruct UE3 and UE1 to share the frequency domain resources corresponding to the first COT. This means that by sending and receiving the indication information, UE3 and UE1 can enable UE1 to share the frequency domain resources corresponding to the first COT initiated / initiated by UE3, thereby enabling UE3 and UE1 to share the unlicensed spectrum in an FDM manner.

[0092] It should also be noted that step S301 can be an optional step.

[0093] It should be understood that the process of initiating / initiating a COT can refer to the process by which a UE accesses an unlicensed spectrum channel according to the LBT mechanism and occupies that channel for a period of time according to specific parameters. A COT can be understood as a segment of time-frequency resources occupied by the terminal device through the LBT mechanism. The frequency domain resource corresponding to the COT is the unlicensed spectrum channel, and the time domain resource corresponding to the COT is the time the terminal device occupies the unlicensed spectrum channel through the LBT mechanism. The specific parameters can include parameters related to the COT, such as the duration of the COT and the time slot allocation structure of the COT. The time slot allocation structure can be used to characterize the specific configuration of the time slots within the COT used for transmission by the terminal device and the time slots used for reception by the terminal device. For example, taking the first COT as an example... Figure 4 As shown, the first COT includes 10 time slots numbered {0,1,2,…,9}. Time slots numbered {0,1,2,3} and {8,9} are used for UE3 transmission and are represented by "T" in the figure; time slots numbered {4,5,6,7} are used for UE3 reception and are represented by "R" in the figure. It should be understood that time slots used for UE3 transmission will be used for UE4 reception; correspondingly, time slots used for UE3 reception will be used for UE4 transmission.

[0094] It should also be understood that the frequency domain resource corresponding to the first COT is all or part of the resource block (RB) of UE3's bandwidth. UE3's bandwidth refers to the width of the channel in the unlicensed spectrum occupied by UE3, such as 20MHz, 40MHz, 80MHz, etc. The first frequency domain resource used by UE3 can be a portion of the RBs in the frequency domain resource corresponding to the first COT. Since the frequency domain resource corresponding to the first COT is all or part of the RBs in UE3's bandwidth, it can be understood that the first frequency domain resource used by UE3 is also a portion of the RBs within UE3's bandwidth.

[0095] In the following text, the frequency domain resource corresponding to the second COT is all or part of the RBs in the bandwidth of UE1. The bandwidth of UE1 refers to the width of the channel in the unlicensed spectrum occupied by UE1, such as 20MHz, 40MHz, 80MHz, etc. The second frequency domain resource used by UE1 can be part of the RBs in the frequency domain resource corresponding to the second COT. Since the frequency domain resource corresponding to the second COT is all or part of the RBs in the bandwidth of UE1, it can be understood that the second frequency domain resource used by UE1 is also a part of the RBs within the bandwidth of UE1.

[0096] Bandwidth can also be called nominal channel bandwidth (NCB).

[0097] S302, UE3 sends an indication message to UE1. Correspondingly, UE1 receives the indication message sent by UE3.

[0098] In one implementation, the indication information can be carried by sidelink control information (SCI) and / or radio resource control (RRC) signaling. Of course, the indication information can also be carried by other signaling, which is not specifically limited here.

[0099] It should be understood that SL data transmission is performed between UE3 and UE4, but not between UE3 and UE1. However, since the unlicensed spectrum is a shared spectrum, the indication information sent by UE3 can be received by UE1, and UE1 can then perform operations such as LBT channel access based on the indication information.

[0100] S303, UE1 occupies the second COT when performing LBT based on UE3.

[0101] Specifically, the second frequency domain resources used by UE1 within the second COT belong to the frequency domain resources corresponding to the first COT, and these resources do not overlap. The second COT is used for communication between UE1 and UE2, allowing UE3 and UE1 to share the frequency domain resources corresponding to the first COT via FDM. In other words, the second frequency domain resources belong to the portion of the first COT resources occupied by UE3 that is not actually used by UE3. Therefore, UE1 and UE3 can share the resources corresponding to the first COT, allowing UE1 to use the resources corresponding to UE3, thus effectively improving resource utilization.

[0102] Through step S303, UE1 can determine the parameters for initiating / initiating the second COT based on the indication information sent by UE3. Specifically, UE1 can perform LBT based on the parameters when UE3 performs LBT to access the unlicensed spectrum channel and occupy the channel for a period of time (i.e., the second COT). The frequency domain resources used by UE1 during the second COT (i.e., the second frequency domain resources) do not overlap with the frequency domain resources used by UE3 during the first COT (i.e., the first frequency domain resources).

[0103] When UE3 has successfully initiated / launched the first COT based on the LBT mechanism, the channel will be in a non-idle state during the first COT. If UE1 performs LBT after UE3 initiates / launches the first COT, it will likely detect that the channel is in a non-idle state, preventing it from performing SL transmission. In this embodiment, the parameters for UE3's LBT are indicated by the indication information, allowing UE1 and UE3 to access the channel at the same time / time period, thus avoiding the failure of one terminal device to compete due to one terminal device performing LBT earlier. Furthermore, the frequency domain information indicated by the indication information ensures that the frequency domain resources used by UE1 during its channel occupation do not overlap with those used by UE3 during its channel occupation, thereby avoiding resource conflicts. This method enables FDM between different terminal devices, improving the resource utilization efficiency of the SL-U system and reducing communication latency.

[0104] The process of aligning LBTs for UE1 and UE3 is described below with reference to an exemplary description of the indication information.

[0105] First, an example is given of the parameters for UE3 to perform LBT as indicated in the indication information. For example, the parameters for UE3 to perform LBT may include at least one of the following: the start time of UE3's LBT, the size of the contention window for UE3's LBT, the counter value for UE3's random backoff, and the priority of UE3's LBT.

[0106] If the parameters for UE3 to perform LBT include the start time T of UE3's LBT... LBT UE1 can determine the start time of LBT based on the start time of LBT performed by UE3. Specifically, UE1 configures the start time of the second COT to be the same as the start time of the first COT, so that UE1 and UE3 can access the unlicensed spectrum channel at the same time.

[0107] In one example, the indication information could indicate the time parameter t. offset , t offset The end time T0 and T of the previous COT before UE3 LBT The time interval between, such as Figure 5 As shown. Therefore, UE1 can determine t based on this indication information. offset Determine the start time T for UE3 to perform LBT LBT For T0+t offset Thus, the start time for performing LBT is determined to be T0+t. offset .

[0108] The above method can be applied to scenarios where the initial / first COT time of UE3 is relatively dynamic. In such scenarios, UE3 can change t. offset The numerical value, obtained through the above method, can accurately indicate the start time of LBT for UE3. Optionally, in the above method, the indication information can be carried by SCI.

[0109] In another example, this indication information could indicate the time parameter t. period , t period For the start time point T1 and T of the previous COT before UE3 LBT The time interval between, such as Figure 6 As shown. Therefore, UE1 can determine t based on this indication information. period Determine the start time T for UE3 to perform LBT LBT For T1+t period Thus, the start time for performing LBT is determined to be T1+t. period .

[0110] The above method can be used in scenarios where the time point of UE3 initialization / initiation of the first COT has certain quasi-static characteristics (such as periodicity). Through the above method, UE3 can indicate a time parameter t in a quasi-static manner. period Therefore, in subsequent initial / initiated first COTs, the start time of LBT at each initial / initiated first COT is t, which is the time interval between the start time of the first COT prior to UE3. period In this way, UE3 can reduce the signaling overhead caused by indication information. Optionally, in the above method, the indication information can be carried by RRC signaling.

[0111] In the above example, the method by which UE1 determines the end time T0 of the previous COT of UE3 (or the start time T1 of the previous COT of UE3) may include, but is not limited to: determining T0 (or T1) by its own signal detection capability or by other indication information from a third terminal device.

[0112] If the parameters for UE3 to perform LBT include the size of the contention window for UE3 to perform LBT, UE1 can determine the size of the contention window for UE1 to perform LBT based on the size of the contention window for UE3 to perform LBT.

[0113] If the parameters of UE3 when performing LBT include the counter value of UE3 for random backoff, UE1 can determine the counter value of UE1 for random backoff based on the counter value of UE3 for random backoff.

[0114] If the parameters for UE3 to perform LBT include the priority of UE3's LBT, UE1 can determine the priority of UE1's LBT based on the priority of UE3's LBT.

[0115] In this way, UE1 can align its random backoff process in LBT as the second COT with the random backoff process in LBT as the first COT, so that UE1 and UE3 can complete LBT and access the channel at the same time.

[0116] In addition to the parameters used by UE3 during LBT, the indication information can also indicate other information, such as the relevant parameters of the first COT. Therefore, UE1 can determine the relevant parameters of the second COT based on the relevant parameters of the first COT.

[0117] For example, the relevant parameters of the first COT include at least one of the following: the bandwidth corresponding to the first COT and the time slot allocation structure of the first COT.

[0118] If the relevant parameters of the first COT include the bandwidth corresponding to the first COT, UE1 can determine the bandwidth corresponding to the second COT based on the bandwidth corresponding to the first COT. The bandwidth corresponding to the second COT does not exceed the bandwidth corresponding to the first COT, that is, the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT, or the bandwidth corresponding to the second COT is the same as the bandwidth corresponding to the first COT.

[0119] If the relevant parameters of the first COT include the time slot allocation structure of the first COT, UE1 can determine the time domain configuration corresponding to the second COT based on the time slot allocation structure of the first COT.

[0120] For example, UE1 can determine the time domain resources of the second COT based on the time slot allocation structure of the first COT, wherein the time domain resources of the second COT are configured in the first COT as time domain resources for UE3 to transmit. Through this design, UE1 can transmit using the transmission resources in the first COT, which are the time domain resources configured in the first COT as time domain resources for UE3 to transmit, thus achieving the technical effect of resource reuse. Optionally, within the second COT, the frequency domain resources used by UE2 to transmit data to UE1 can be the same as the frequency domain resources used by UE1 to transmit data to UE2. Through this design, when the time slot allocation structure of the second COT includes time slots for UE1 to transmit data to UE2 and time slots for UE2 to transmit data to UE1, it can be guaranteed that the frequency domain resources used by UE2 in the second COT and the frequency domain resources used by UE3 in the first COT are orthogonal (i.e., non-overlapping).

[0121] For example, UE1 can determine the time slot allocation structure of the second COT based on the time slot allocation structure of the first COT, wherein the time slot allocation structure of the second COT is the same as that of the first COT. Optionally, within the first COT, the frequency domain resources used by UE4 to send data to UE3 are the same as the frequency domain resources used by UE3 to send data to UE4; and within the second COT, the frequency domain resources used by UE2 to send data to UE1 are the same as the frequency domain resources used by UE1 to send data to UE2.

[0122] The preceding text described the process by which UE1 and UE3 share the frequency domain resources corresponding to the first COT. Based on this process, in one possible implementation, before UE1 and UE3 share the frequency domain resources corresponding to the first COT, UE1 and UE3 may negotiate and agree to allow UE1 and UE3 to share the frequency domain resources corresponding to the first COT. It should be noted that the process by which UE1 and UE3 negotiate and agree to allow UE1 and UE3 to share the frequency domain resources corresponding to the first COT can also be implemented independently of the aforementioned process for UE1 and UE3 to share the frequency domain resources corresponding to the first COT.

[0123] In one specific implementation, such as Figure 7 As shown, the negotiation process between UE3 and UE1 can be as follows:

[0124] Step 1: UE1 sends a request message to UE3. The request message is used to request the sharing of frequency domain resources corresponding to the first COT.

[0125] Optionally, the request message may carry at least one of the following: a first parameter and a second parameter. The first parameter indicates the size of the frequency domain resources (i.e., the second frequency domain resources) used by UE1; for example, the first parameter may indicate the number of interlaced resource blocks (RBs) used by UE1. The second parameter indicates the bandwidth of UE1; for example, the bandwidth used by UE1 may be 20MHz, 40MHz, 60MHz, or 80MHz. UE1 sending the second parameter to UE3 can be used to request bandwidth for sharing 20MHz, 40MHz, 60MHz, or 80MHz of unlicensed spectrum with UE3. Optionally, the first and / or second parameters may be RRC signaling parameters.

[0126] Through the above design, when UE1 sends a request message to UE3, the message also carries information about the unlicensed spectrum resources requested by UE1. This helps UE3 determine whether it is acceptable to share the unlicensed spectrum with UE1, enabling more effective coordination between UE1 and UE3 and avoiding system reliability degradation caused by the use of non-orthogonal (i.e., overlapping) frequency domain resources. For example, UE1 uses N interleaved resource blocks, where N is a positive integer. UE3 uses M interleaved resource blocks when sending SL data to UE4, where M is a positive integer. If M+N is less than or equal to the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum, then UE1 and UE3 can potentially share the unlicensed spectrum by using orthogonal (i.e., non-overlapping) frequency domain resources.

[0127] The total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum varies depending on the subcarrier spacing. For example, when the subcarrier spacing is 30kHz, the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum can be 5; when the subcarrier spacing is 15kHz, the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum can be 10. Taking a total of 5 interleaved resource blocks within the bandwidth of the unlicensed spectrum as an example, the value range of N is {1,2,3,4}. Taking a total of 10 interleaved resource blocks within the bandwidth of the unlicensed spectrum as an example, the value range of N is {1,2,3,4,5,6,7,8,9}.

[0128] Step 2: When UE3 determines that UE1 is allowed to share the frequency domain resources corresponding to the first COT, UE3 sends a response message to UE1. The response message is used to indicate that UE1 is allowed to share the frequency domain resources corresponding to the first COT.

[0129] In one possible implementation, UE3 can also send a response message to UE1 when it determines that UE1 is not allowed to share the frequency domain resources corresponding to the first COT. This response message indicates that UE1 is not allowed to share the frequency domain resources corresponding to the first COT. For example, UE3 can send an acknowledgement (ACK) message to UE1 when it determines that UE1 is allowed to share the frequency domain resources corresponding to the first COT, and can also send a negative acknowledgement (NACK) message to UE1 when it determines that UE1 is not allowed to share the frequency domain resources corresponding to the first COT. Through the above design, UE3 sends a response message to UE1 after determining whether it is acceptable to share the unlicensed spectrum with UE1. This helps UE1 determine whether it is acceptable to share the unlicensed spectrum with UE3 in an FDM manner, thereby avoiding the degradation of system reliability caused by the use of non-orthogonal frequency domain resources.

[0130] Optionally, the response message ACK may carry at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of UE3. Optionally, the third and / or fourth parameter may be RRC signaling parameters. Specifically, the third parameter may indicate the number of the first interleaved resource block in the second frequency domain resource within the remaining interleaved resource blocks, where the remaining interleaved resource blocks include the interleaved resource blocks in the frequency domain resource corresponding to the first COT, excluding the first frequency domain resource. The fourth parameter may indicate the offset of the bandwidth of UE1 relative to the bandwidth of UE3.

[0131] Using the above design, when UE3 accepts sharing unlicensed spectrum with UE1, UE3 can send a fourth parameter to UE1 to indicate the location of the bandwidth of the unlicensed spectrum that UE1 can use, and / or UE3 can send a third parameter to UE1 to indicate the location of the frequency domain resources that UE1 can use. In this way, UE3 can restrict the unlicensed spectrum shared by UE1, which is beneficial to improving the coordination effect between terminal devices. It is also beneficial to reasonably configure the unlicensed spectrum that each terminal device can use when there are multiple first terminal devices in the network, and avoid mutual interference between multiple terminal devices.

[0132] For example, within the first COT, the frequency domain resources used by UE1 are numbered n in the remaining interleaved resource blocks, where n is an integer greater than or equal to 0. When the size of the frequency domain resources used by UE1 is N interleaved resource blocks, and the size of the frequency domain resources used by UE3 when sending data to UE4 is M interleaved resource blocks, UE3 can indicate the location of the N interleaved resource blocks it can use by sending a third parameter to UE1.

[0133] Step 3: UE1 determines that it can share the frequency domain resources corresponding to the first COT with UE3 in the form of FDM.

[0134] One possible implementation is that UE1 receives first indication information from UE3, which indicates the size and location of the frequency domain resources that UE3 will use within the first COT. When UE1 receives a response message from UE3 including an ACK, UE1 determines the location of the frequency domain resources it will use within the first COT based on the aforementioned first indication information. Optionally, the aforementioned first indication information can be indication information in the SCI (Single Channel Index). Figure 3 The method shown can be: the first information can be Figure 3 The instructions involved in the method shown.

[0135] Specifically, UE1 can determine the location of the frequency domain resources (i.e., the second frequency domain resources) it uses within the first COT based on the first indication information and the third parameter. Specifically, UE1 can determine the size and location of the frequency domain resources (i.e., the first frequency domain resources) occupied by UE3 within the first COT based on the first indication information, thereby obtaining the size and location of the remaining available frequency domain resources within the bandwidth of the unlicensed spectrum. Further, UE1 can determine the location of the frequency domain resources it will use within the aforementioned remaining available frequency domain resources based on the third parameter.

[0136] For example, such as Figure 8 As shown, assuming the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum is 5, and UE1 requests N=1 interleaved resource blocks of frequency domain resources, the third parameter from UE3 indicates that the frequency domain resource UE1 can use within the frequency domain resources corresponding to the first COT is the interleaved resource block numbered 1 (i.e., n=1, where the first interleaved resource block in the remaining interleaved resource blocks is numbered 0, i.e., n=0). When the first indication information indicates that UE3 will use M=3 interleaved resource blocks corresponding to m=0, m=1, and m=2 within the first COT, UE1 determines that it will use N=1 interleaved resource blocks corresponding to m=4 based on n=1. When the first indication information indicates that UE3 will use M=4 interleaved resource blocks corresponding to m=1, m=2, m=3, and m=4 within the first COT, UE1 determines that it cannot share the unlicensed spectrum with UE3 based on n=1. Since only 5-M=1 interleaved resource blocks remain in the bandwidth of the unlicensed spectrum besides M=4, and the offset value n=1 only takes effect when the number of remaining interleaved resource blocks 5-M≥N+n, that is, when M+N+n is greater than the total number of interleaved resource blocks in the bandwidth of the unlicensed spectrum, UE1 determines that it cannot use any frequency domain resources in the frequency domain resources corresponding to the first COT.

[0137] Optionally, when UE1 receives a response message indicating that UE1 is not allowed to share the frequency domain resources corresponding to the first COT, it can determine that it will not share the frequency domain resources corresponding to the first COT with UE3 in the FDM manner.

[0138] pass Figure 7 The method shown allows UE1 to coordinate with UE3 before UE3 initiates / launches the first COT, requesting to share some or all of the frequency domain resources in the time domain within the first COT in an FDM manner.

[0139] The above negotiation process can also be called a request process, or it can be described as an association process. Through the above process, after UE1 is associated with UE3, UE1 can act as a secondary terminal device, and UE3 can act as a primary terminal device.

[0140] The aforementioned coordination process is applicable to resource coordination between transmitting terminal devices belonging to different communication pairs. It breaks the current limitation that coordination is only possible between terminal devices belonging to the same communication pair. This process eliminates the need for access network devices or terminal devices with centralized scheduling capabilities within the network; instead, it requires only simple signaling interaction between the terminal devices. After the signaling interaction is complete, unlicensed spectrum can be continuously shared within subsequent COT (Community over Time). Compared to direct resource scheduling, this method reduces the overhead of scheduling signaling interaction, further improving the resource utilization efficiency of unlicensed spectrum.

[0141] The negotiation process between terminal devices is illustrated below with a specific example. Assume that the total number of interleaved resource blocks within the unlicensed spectrum bandwidth is 5. In the first COT, UE3 will use M = 3 interleaved resource blocks to perform SL transmission with UE4. This process may include steps S1 to S3.

[0142] S1, as Figure 9 As shown, three terminal devices send request messages to UE3. These three terminal devices are numbered 1, 2 and 3 respectively.

[0143] Among them, terminal device number 1 and terminal device number 2 respectively sent request messages to UE3, requesting to share the unlicensed spectrum with UE3, and the size of the frequency domain resources used is N=1 interleaved resource blocks; terminal device number 3 also sent a request message to UE3, requesting to share the unlicensed spectrum with UE3, and the size of the frequency domain resources used is N=3 interleaved resource blocks.

[0144] S1, in Figure 10 In the process, UE3 sends response messages to the three terminal devices mentioned above.

[0145] Since the frequency domain resource requested by terminal device number 3 is N = 3 interleaved resource blocks, and N + M = 3 + 4 = 7 > 5, the required shared frequency domain resource is too large. Therefore, UE3 sends a response message including NACK to terminal device number 3. Since the frequency domain resource requested by terminal devices number 1 and 2 is N = 1 interleaved resource blocks, satisfying M + 1 + 1 ≤ 5, UE3 sends a response message including ACK to terminal device number 1. This response message also includes an offset value of n = 0, which indicates that the N = 1 interleaved resource blocks that terminal device number 1 can use are the first interleaved resource block among the two remaining interleaved resource blocks in the bandwidth of the unlicensed spectrum, excluding the M = 3 interleaved resource blocks. Similarly, UE3 sends a response message including ACK to terminal device number 2. The response message also includes an offset value of n=1, which indicates that the terminal device number 2 can use N=1 interleaved resource blocks as the second interleaved resource block among the two remaining interleaved resource blocks in the bandwidth of the unlicensed spectrum, excluding M=3 interleaved resource blocks.

[0146] S3, Terminal device number 1 and Terminal device number 2 are determined to be able to share the frequency domain resources corresponding to the first COT with UE3 in an FDM manner.

[0147] When UE3 uses M=3 interleaved resource blocks corresponding to m=0, m=1, and m=2 in the first COT, terminal device number 1 determines that it will use interleaved resource block numbered 0 in the two interleaved resource blocks m=3 and m=4, i.e., interleaved resource block m=3, based on n=0. Terminal device number 2 determines that it will use interleaved resource block numbered 1 in the two interleaved resource blocks m=3 and m=4, i.e., interleaved resource block m=4, based on n=1.

[0148] In this embodiment, the parameters for LBT (Low-Time Bypass) of the second terminal device are indicated by the indication information, enabling the first and second terminal devices to jointly access the channel at the same time. This avoids the other terminal device failing to compete due to one terminal device performing LBT earlier. Furthermore, the frequency domain information indicated by the indication information ensures that the frequency domain resources used by the first terminal device during its channel occupancy do not overlap with those used by the second terminal device, thus avoiding resource conflicts. This method enables frequency division multiplexing among different terminal devices, improving the resource utilization efficiency of the SL-U system and reducing communication latency.

[0149] Furthermore, the aforementioned coordination process does not require access network devices or terminal devices with centralized scheduling capabilities within the network. Instead, it only requires simple signaling interactions between terminal devices. After the signaling interaction is completed, unlicensed spectrum can be continuously shared within subsequent COTs. Compared to direct resource scheduling, this method can reduce the interaction overhead of scheduling signaling and further improve the resource utilization efficiency of unlicensed spectrum.

[0150] Based on the same inventive concept as the method embodiments, this application provides a communication device, the structure of which can be as follows: Figure 11 As shown, it includes a communication module 1101 and a processing module 1102. The processing module 1102 is used to process algorithms, software, programs, and storage involved in the communication process. The communication module 1101 is used to transmit and receive signals. Optionally, the communication module 1101 may include a transmitting module and a receiving module; the transmitting module is used to transmit wireless signals, and the receiving module is used to receive wireless signals.

[0151] In one specific implementation, the communication device can be used to achieve... Figures 3-10 The method executed by the first terminal device in the described embodiment can be the first terminal device itself, or a chip or chipset within the first terminal device, or a part of a chip used to execute related method functions. Specifically, the communication module 1101 receives instruction information from the second terminal device, indicating: the parameters of the second terminal device performing LBT (Listen-The-Before-Speak), and the parameters of the first frequency domain resource used by the second terminal device. The first frequency domain resource belongs to the frequency domain resource corresponding to the first COT (Content Optimization Time), and the first COT is used for communication between the second terminal device and the third terminal device. The processing module 1102, based on the parameters of the second terminal device performing LBT, occupies the second COT, wherein the second frequency domain resource used by the first terminal device within the second COT belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource. The second COT is used for communication between the first terminal device and the fourth terminal device.

[0152] Optionally, the indication information also indicates: relevant parameters of the first COT; the processing module 1102 is further configured to: determine relevant parameters of the second COT based on the relevant parameters of the first COT.

[0153] For example, the relevant parameters of the first COT include at least one of the following: the bandwidth corresponding to the first COT and the time slot allocation structure of the first COT. Correspondingly, the relevant parameters of the second COT include at least one of the following: the bandwidth corresponding to the second COT and the time domain resources corresponding to the second COT. Wherein, the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT, and the time domain resources corresponding to the second COT are within the first type of time domain resources corresponding to the first COT. The first type of time domain resources is used for the second terminal device to transmit sideline data.

[0154] For example, the parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device performing LBT, the size of the contention window of the second terminal device performing LBT, the counter value of the second terminal device performing random backoff, and the priority of the second terminal device performing LBT.

[0155] Optionally, before receiving the indication information from the second terminal device, the communication module 1101 is further configured to: send a request message to the second terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT; and receive a response message from the second terminal device, the response message being used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0156] For example, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter indicates the bandwidth of the first terminal device.

[0157] For example, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device.

[0158] For example, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource among the remaining interleaved resource blocks, which include the interleaved resource blocks in the frequency domain resource corresponding to the first COT other than the first frequency domain resource.

[0159] The fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.

[0160] In another specific embodiment, the communication device can be used to implement... Figures 3-10 The method executed by the second terminal device in the described embodiment can be the second terminal device itself, or a chip or chipset within the second terminal device, or a part of a chip used to execute related method functions. Specifically, the processing module 1102 determines indication information, which instructs the first terminal device and the second terminal device to share the frequency domain resources corresponding to the first COT. The first COT is used for communication between the second terminal device and the third terminal device. The indication information indicates: the parameters of the second terminal device when performing Listen-Before-Speak (LBT), and the parameters of the first frequency domain resources used by the second terminal device, wherein the first frequency domain resources belong to the frequency domain resources corresponding to the first COT. The communication module 1101 sends the indication information to the first terminal device.

[0161] For example, the indication information also indicates the relevant parameters of the first COT.

[0162] For example, the relevant parameters of the first COT include at least one of the following: the bandwidth corresponding to the first COT, and the time slot allocation structure of the first COT.

[0163] For example, the parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device performing LBT, the size of the contention window of the second terminal device performing LBT, the counter value of the second terminal device performing random backoff, and the priority of the second terminal device performing LBT.

[0164] Optionally, before sending the indication information to the first terminal device, the communication module 1101 is further configured to: receive a request message from the first terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT. Correspondingly, the processing module 1102 is further configured to determine whether the first terminal device is allowed to share the frequency domain resources corresponding to the first COT. Further, the communication module 1101 is further configured to: send a response message to the first terminal device, wherein the response message is used to indicate whether the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

[0165] For example, the request message carries at least one of the following: a first parameter and a second parameter. The first parameter indicates the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter indicates the bandwidth of the first terminal device. Accordingly, the processing module 1102, when determining whether the first terminal device is allowed to share the frequency domain resource corresponding to the first COT, may specifically be configured to: determine whether the first terminal device is allowed to share the frequency domain resource corresponding to the first COT based on the first parameter and the number of interleaved resource blocks included in the first frequency domain resource; and / or, determine whether the first terminal device is allowed to share the frequency domain resource corresponding to the first COT based on the second parameter and the bandwidth of the second terminal device.

[0166] For example, the response message carries at least one of the following: a third parameter and a fourth parameter. The third parameter indicates the location of the second frequency domain resource, and the fourth parameter indicates the location of the bandwidth of the first terminal device.

[0167] For example, the third parameter indicates the number of the first interleaved resource block in the second frequency domain resource among the remaining interleaved resource blocks, the remaining interleaved resource blocks including the interleaved resource blocks in the frequency domain resource corresponding to the first COT other than the first frequency domain resource.

[0168] The fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.

[0169] The module division in this application embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules. It is understood that the functions or implementations of the modules in the embodiments of this application can be further described in the relevant descriptions of the method embodiments.

[0170] In one possible approach, the communication device can be as follows: Figure 12 As shown, the device can be a communication device or a chip within a communication device, wherein the communication device can be either the first terminal device or the second terminal device in the above embodiments. The device includes a processor 1201 and a communication interface 1202, and may also include a memory 1203. The processing module 1102 can be the processor 1201. The communication module 1101 can be the communication interface 1202.

[0171] The processor 1201 can be a CPU, a digital processing unit, or something similar. The communication interface 1202 can be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device also includes a memory 1203 for storing the program executed by the processor 1201. The memory 1203 can be non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or it can be volatile memory, such as random-access memory (RAM). The memory 1203 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited to this.

[0172] The processor 1201 is used to execute the program code stored in the memory 1203, specifically to perform the actions of the aforementioned processing module 1102, which will not be described in detail here. The communication interface 1202 is specifically used to perform the actions of the aforementioned communication module 1101, which will not be described in detail here.

[0173] This application embodiment does not limit the specific connection medium between the communication interface 1202, processor 1201, and memory 1203. This application embodiment... Figure 12The memory 1203, processor 1201, and communication interface 1202 are connected via a bus 1204. Figure 12 The connections between other components are shown in bold lines only and are not intended to be limiting. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, Figure 12 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0174] This invention also provides a computer-readable storage medium for storing computer software instructions required to execute the processor, including a program required to execute the processor.

[0175] This application also provides a communication system, including methods for implementing... Figures 3-10 The communication device for implementing the functions of the first terminal device in the embodiments described herein and the communication device for implementing the functions of the first terminal device. Figures 3-10 The communication device described in the embodiment is a second terminal device.

[0176] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0177] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0178] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0179] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0180] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A side-to-side communication method, characterized in that, The method is applicable to a first terminal device, and the method includes: The device receives an instruction from a second terminal device, the instruction indicating: the parameters of the second terminal device when performing Listen-Before-Speak (LBT), and the parameters of the first frequency domain resource used by the second terminal device, wherein the first frequency domain resource belongs to the frequency domain resource corresponding to the first channel occupancy time (COT), and the first COT is used for communication between the second terminal device and the third terminal device; The second COT is occupied by parameters when the second terminal device performs LBT, wherein the second frequency domain resource used by the first terminal device in the second COT belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource. The second COT is used for communication between the first terminal device and the fourth terminal device.

2. The method as described in claim 1, characterized in that, The indication information also indicates: relevant parameters of the first COT; The method further includes: The relevant parameters of the second COT are determined based on the relevant parameters of the first COT.

3. The method as described in claim 2, characterized in that, The relevant parameters of the first COT include at least one of the following: the bandwidth corresponding to the first COT, and the time slot allocation structure of the first COT; The relevant parameters of the second COT include at least one of the following: the bandwidth corresponding to the second COT and the time domain resources corresponding to the second COT, wherein the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT, and the time domain resources corresponding to the second COT are within the first type of time domain resources corresponding to the first COT, and the first type of time domain resources are used for the second terminal device to send side-by-side data.

4. The method according to any one of claims 1-3, characterized in that, The parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device performing LBT, the size of the contention window of the second terminal device performing LBT, the counter value of the second terminal device performing random backoff, and the priority of the second terminal device performing LBT.

5. The method according to any one of claims 1-4, characterized in that, Before receiving indication information from the second terminal device, the method further includes: Send a request message to the second terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT; The system receives a response message from the second terminal device, the response message indicating that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

6. The method as described in claim 5, characterized in that, The request message carries at least one of the following: a first parameter and a second parameter, wherein the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter is used to indicate the bandwidth of the first terminal device.

7. The method as described in claim 6, characterized in that, The response message carries at least one of the following: a third parameter and a fourth parameter, wherein the third parameter is used to indicate the location of the second frequency domain resource, and the fourth parameter is used to indicate the location of the bandwidth of the first terminal device.

8. The method as described in claim 7, characterized in that, The third parameter indicates the number of the first interleaved resource block in the second frequency domain resource among the remaining interleaved resource blocks, the remaining interleaved resource blocks including the interleaved resource blocks in the frequency domain resource corresponding to the first COT other than the first frequency domain resource.

9. The method as described in claim 7 or 8, characterized in that, The fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.

10. A side-to-side communication method, characterized in that, The method is applicable to a second terminal device, and the method includes: The system determines instruction information, which indicates: the parameters of the second terminal device when performing Listen-Before-Speak (LBT), and the parameters of the first frequency domain resource used by the second terminal device. The first frequency domain resource belongs to the frequency domain resource corresponding to the first Channel Occupancy Time (COT), and the first COT is used for communication between the second terminal device and the third terminal device. The instruction information is used to instruct the first terminal device to share the frequency domain resource corresponding to the first COT with the second terminal device based on the parameters of the second terminal device when performing LBT. The second frequency domain resource used by the first terminal device belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource. The instruction information is sent to the first terminal device.

11. The method as described in claim 10, characterized in that, The indication information also indicates the relevant parameters of the first COT.

12. The method as described in claim 11, characterized in that, The relevant parameters of the first COT include at least one of the following: the bandwidth corresponding to the first COT, and the time slot allocation structure of the first COT.

13. The method according to any one of claims 10-12, characterized in that, The parameters for the second terminal device to perform LBT include at least one of the following: the start time of the second terminal device performing LBT, the size of the contention window of the second terminal device performing LBT, the counter value of the second terminal device performing random backoff, and the priority of the second terminal device performing LBT.

14. The method according to any one of claims 10-13, characterized in that, Before sending the indication information to the first terminal device, the method further includes: Receive a request message from the first terminal device, the request message being used to request sharing the frequency domain resources corresponding to the first COT; It is determined that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT; A response message is sent to the first terminal device, wherein the response message is used to indicate that the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

15. The method as described in claim 14, characterized in that, The request message carries at least one of the following: a first parameter and a second parameter, wherein the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource, and the second parameter is used to indicate the bandwidth of the first terminal device; The step of determining whether to allow the first terminal device to share the frequency domain resources corresponding to the first COT includes: Based on the first parameter and the number of interleaved resource blocks included in the first frequency domain resource, it is determined whether the first terminal device is allowed to share the frequency domain resource corresponding to the first COT; and / or Based on the second parameter and the bandwidth of the second terminal device, it is determined whether the first terminal device is allowed to share the frequency domain resources corresponding to the first COT.

16. The method as described in claim 15, characterized in that, The response message carries at least one of the following: a third parameter and a fourth parameter, wherein the third parameter is used to indicate the location of the second frequency domain resource, and the fourth parameter is used to indicate the location of the bandwidth of the first terminal device.

17. The method as described in claim 16, characterized in that, The third parameter indicates the number of the first interleaved resource block in the second frequency domain resource among the remaining interleaved resource blocks, the remaining interleaved resource blocks including the interleaved resource blocks in the frequency domain resource corresponding to the first COT other than the first frequency domain resource.

18. The method as described in claim 16 or 17, characterized in that, The fourth parameter indicates the offset of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.

19. A communication device, characterized in that, The apparatus includes a module for implementing the method as described in any one of claims 1-9; or, the apparatus includes a module for implementing the method as described in any one of claims 10-18.

20. A communication device, characterized in that, include: Memory, used to store instructions; A processor is configured to retrieve and execute the instructions from the memory, causing the communication device to perform the method as described in any one of claims 1-9 or the method as described in any one of claims 10-18.

21. A communication system, characterized in that, It includes a first terminal device and a second terminal device, wherein the first terminal device is used to implement the method as described in any one of claims 10-18, and the second terminal device is used to implement the method as described in any one of claims 1-9.

22. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when invoked and executed on a computer, cause the computer to perform the method as described in any one of claims 1-9 or the method as described in any one of claims 10-18.

23. A computer program product, characterized in that, The computer program product includes instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-9 or the method as described in any one of claims 10-18.

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