A communication method and related apparatus

Abstract

The application discloses a communication method and related devices, wherein the method is applied to a sidelink (SL) scenario, and comprises the following steps: a first terminal device determines one or more directions of directional Listen Before Talk (LBT); and the first terminal device performs data transmission with a second terminal device in an actual transmission direction corresponding to the one or more directions of directional LBT. Through the technical solution provided in the application, the transmission direction of directional LBT in SL communication can be determined.

Description

Technical Field

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

[0002] In existing protocols, direct machine-to-machine (MMT) communication systems or sidelink (SL) communication operate on licensed 4G or 5G spectrum. Limited spectrum resources will be insufficient to support the significant increase in data services, necessitating future expansion of SL transmission to unlicensed spectrum. Before using unlicensed spectrum, a Listen Before Talk (LBT) transmission strategy must be implemented; access to the unlicensed spectrum is only granted if the channel is found to be idle. Prior to Release 17 (R17), LBT schemes on unlicensed spectrum generally referred to omnidirectional LBT. However, for directional LBT, current technology cannot determine the transmission direction in directional LBT within SL communication. Summary of the Invention

[0003] This application provides a communication method and related apparatus, which can determine the transmission direction of directional LBT in SL communication.

[0004] Firstly, this application provides a communication method that can be applied to a terminal device or a module (e.g., a chip) within the terminal device. The following description uses an application to a terminal device as an example. The method may include: a first terminal device determining the direction of one or more directional LBTs; and the first terminal device transmitting data with a second terminal device in an actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0005] In the solution provided in this application, the terminal device can determine the direction of the directional LBT. Unlike the prior art, where the terminal device can only determine the omnidirectional LBT direction but not the directional LBT direction, in the embodiments of this application, the terminal device can perform SL communication with another terminal device in the actual transmission direction corresponding to the directional LBT, thereby improving the efficiency and accuracy of communication.

[0006] In one possible implementation, the method further includes: the first terminal device receiving first indication information from a network device, the first indication information being used to determine the direction of the one or more directional LBTs.

[0007] In the solution provided in this application, for Mode 1 of SL transmission, the network device can assist the terminal device in determining the direction of the directional LBT. Specifically, the terminal device can directly obtain the direction of the directional LBT based on the indication information from the network device used to indicate the direction of the directional LBT. This can reduce the resource consumption of the terminal device and improve the operating speed.

[0008] In one possible implementation, the first terminal device determines the direction of the directional LBT by: the first terminal device receiving feedback information from the second terminal device, the feedback information including channel quality results, beam reports, and recommended directions; and the first terminal device determining the direction of one or more directional LBTs based on one or more of the channel quality results, the beam reports, and the recommended directions.

[0009] In the solution provided in this application, for SL transmission mode two, when two terminal devices need SL transmission in an area without network access, the terminal devices can determine the direction of the directional LBT independently without the assistance of network equipment. This enables SL communication with another terminal device based on the directional LBT direction.

[0010] In one possible implementation, the first terminal device receives the feedback information from the second terminal device via a physical sidelink shared channel (PSSCH) / physical sidelink feedback channel (PSFCH).

[0011] In one possible implementation, the direction of the one or more directional LBTs is either the direction of the most recent successful transmission between the first terminal device and the second terminal device, or the direction of the beam of the best quality reference signal (Conference Signal, RS) in the most recent beam report.

[0012] In the scheme provided in this application, determining the direction of the directional LBT to be the direction of the most recent successful transmission between the two terminal devices can improve the success rate of the directional LBT. Determining the direction of the directional LBT to be the direction of the beam of the RS with the best quality in the most recent beam report can improve the efficiency and accuracy of communication.

[0013] In one possible implementation, the method further includes: the first terminal device receiving second indication information from the network device, the second indication information being used to indicate the correspondence between the direction of the directional LBT and the actual transmission direction.

[0014] In the solution provided in this application, there is a correspondence between the direction of the directional LBT and the actual transmission direction. The network device can pre-configure this correspondence to the terminal device. This allows the terminal device to determine the actual transmission direction based on the determined directional LBT and the correspondence, thus enabling data transmission with another terminal device in the actual transmission direction.

[0015] In one possible implementation, after the first terminal device determines the direction of one or more directional LBTs, the method further includes: the first terminal device sending information about the direction of the one or more directional LBTs to the second terminal device.

[0016] In the solution provided in this application, after the terminal device determines the direction of the directional LBT, it can send the direction information of the directional LBT to another terminal device. In this way, the other terminal device can listen for information from the terminal device in the direction of these directional LBTs, thereby realizing data transmission between the two terminal devices.

[0017] In one possible implementation, the first terminal device sends the direction information of the one or more directional LBTs to the second terminal device via Sidelink Control Information (SCI), Radio Resource Control (RRC) of the PC-5 port, or Medium Access Control-Control element (MAC-CE) of the PC-5 port.

[0018] In one possible implementation, the first indication information is configured by Downlink Control Information (DCI) or by MAC-CE.

[0019] In one possible implementation, the second indication information is configured by RRC.

[0020] Secondly, this application provides a communication device.

[0021] The beneficial effects can be found in the description of the first aspect, and will not be repeated here. The communication device has the function of implementing the behavior described in the method example of the first aspect above. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described function.

[0022] The communication device includes:

[0023] Determining unit, used to determine the orientation of one or more oriented LBTs;

[0024] The transmission unit is used to transmit data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0025] In one possible implementation, the transmission unit is further configured to:

[0026] Receive first indication information from a network device, the first indication information being used to determine the direction of the one or more directional LBTs.

[0027] In one possible implementation, the determining unit is specifically used for:

[0028] Receive feedback information from the second terminal device, the feedback information including channel quality results, beam reports, and recommended directions;

[0029] The directions of one or more directional LBTs are determined based on one or more of the channel quality results, the beam report, and the recommended directions.

[0030] In one possible implementation, the feedback information from the second terminal device is received via PSSCH / PSFCH.

[0031] In one possible implementation, the direction of the one or more directional LBTs is either the direction of the most recent successful transmission between the first terminal device and the second terminal device, or the direction of the beam of the RS with the best quality in the most recent beam report.

[0032] In one possible implementation, the transmission unit is further configured to:

[0033] Receive second indication information from the network device, the second indication information being used to indicate the correspondence between the direction of the directional LBT and the actual transmission direction.

[0034] In one possible implementation, the transmission unit is further configured to:

[0035] After determining the direction of one or more directional LBTs, the direction information of the one or more directional LBTs is sent to the second terminal device.

[0036] In one possible implementation, the direction information of the one or more directional LBTs is sent to the second terminal device via the serial communication interface SCI of the SL, the RRC of the PC-5 port, or the media access control element MAC-CE of the PC-5 port.

[0037] In one possible implementation, the first indication information is configured by downlink control information (DCI) or by media access control element (MAC-CE).

[0038] In one possible implementation, the second indication information is configured by RRC.

[0039] Thirdly, a communication device is provided, which can be a terminal device or a module (e.g., a chip) within a terminal device. The device may include a processor, a memory, an input interface, and an output interface. The input interface is used to receive information from other communication devices besides the communication device, and the output interface is used to output information to other communication devices besides the communication device. The processor invokes a computer program stored in the memory to execute the communication method provided in the first aspect or any embodiment of the first aspect.

[0040] Fourthly, this application provides a computer-readable storage medium storing computer instructions that, when the computer program or computer instructions are executed, cause the methods described in the first aspect and any possible implementation thereof to be performed.

[0041] Fifthly, this application provides a computer program product including executable instructions that, when the computer program product is run on a user device, cause the methods described in the first aspect and any possible implementation thereof to be executed.

[0042] Sixthly, this application provides a chip system including a processor and potentially a memory for implementing the methods described in the first aspect and any possible implementation thereof. The chip system may be composed of chips or may include chips and other discrete devices. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a network architecture provided in an embodiment of this application;

[0045] Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0046] Figure 3 This is a flowchart illustrating another communication method provided in an embodiment of this application;

[0047] Figure 4This is a flowchart illustrating another communication method provided in an embodiment of this application;

[0048] Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0049] Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0050] Figure 7 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. Definitions of technical terms that may appear in the embodiments of this application are given below:

[0053] (1) Listen first, then speak mechanism

[0054] Listen Before Talk (LBT), also known as listen-before-send, is a channel access mechanism that enables wireless local area networks to effectively share the same spectrum resources. Because the availability of channels on unlicensed frequency bands cannot be guaranteed at all times, LBT requires listening to the channel before transmitting data to perform Clear Channel Assessment (CCA), and only transmits data if the channel is confirmed to be idle.

[0055] (2) Straight-through link

[0056] A sidelink (SL), also known as a side-link or edge link, is a new link introduced to support direct communication between devices. It was first introduced in device-to-device (D2D) applications, and later, as the technology extended to vehicle-to-everything (V2X) communication, it was expanded and enhanced based on the original protocol. NR Sidelink mainly consists of the Physical Sidelink Control Channel (PSCCH), PSSCH, Physical Sidelink Broadcast Channel (PSBCH), and PSFCH. The first three channels already existed in LTE-V2X, while PSFCH was newly introduced in NR V2X to support Hybrid Automatic Repeat reQuest (HARQ) transmission.

[0057] (3) SL transmission mode

[0058] There are two modes for resource selection in SL data transmission.

[0059] Mode 1 (Mode-1) involves the network device allocating SL transmission resources. For example, when a terminal is within network coverage, the network device allocates SL transmission resources to the terminal. The network device can send control messages via the control channel, such as sending DCI messages via the Physical Downlink Control Channel (PDCCH).

[0060] Mode 2 allows the terminal to autonomously select SL transmission resources based on pre-configured information. This pre-configured information can be built into the terminal, stored in the SIM card, or be pre-registered network configuration information. For example, in areas without network coverage, the terminal can autonomously determine SL transmission resources. If the terminal autonomously selects resources, resource allocation can be performed via SCI control messages transmitted through the PSSCH mechanism.

[0061] In existing protocols, SL communication operates on licensed 4G or 5G spectrum. Limited spectrum resources will be insufficient to support the significant increase in data services, necessitating future expansion of SL transmission to unlicensed spectrum. Before using unlicensed spectrum, a LBT (Local Bandwidth Bypass) transmission strategy must be implemented. Access to the unlicensed spectrum is only permitted if the channel is found to be idle. Prior to Release 17 (R17), LBT schemes on unlicensed spectrum generally referred to omnidirectional LBT. However, for directional LBT, current technology cannot determine the transmission direction of directional LBT in SL communication.

[0062] The technical problem to be solved by the embodiments of this application may include: In the embodiments of this application, the terminal device can determine the direction of the directional LBT, thereby realizing data transmission with another terminal device in the actual transmission direction corresponding to the direction of the directional LBT.

[0063] Based on the above, in order to better understand the communication method and related apparatus proposed in this application, the network architecture applied in the embodiments of this application will be described below.

[0064] With the development of wireless communication technology, users' communication needs are increasing. To meet these needs, direct machine-to-machine (DMT) communication technology or Solid State (SL) communication technology has been introduced into wireless communication technology. Unlike traditional wireless cellular network communication technology, DMT or SL communication technology enables direct communication between terminal devices. Data packets transmitted using DMT or SL communication technology do not need to be forwarded by network devices and can be directly transmitted from the first terminal device (as the sender) to the second terminal device (as the receiver) via SL. For ease of description, the embodiments in this application are exemplified using SL communication technology.

[0065] Please see Figure 1 , Figure 1 This is a schematic diagram of a network architecture provided in an embodiment of this application. Figure 1 As shown, the network architecture may include network device 101, first terminal device 102, and second terminal device 103. The first terminal device 102 establishes a communication connection with network device 101 via traditional wireless cellular network communication technology, and can communicate via uplink and downlink. The first terminal device 102 and second terminal device 103 establish a communication connection via SL communication technology, and can communicate via a direct link. The first terminal device 102 can act as the transmitter of SL communication, and the second terminal device 103 can act as the receiver of SL communication. The first terminal device 102 and the second terminal device 103 can be fixed in location or movable.

[0066] Network device 101 can be an entity used to transmit or receive signals, or a device used to communicate with terminal devices. This network device can be a base station (BTS) in a Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA) system, a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (CRAN) scenario. Alternatively, the network device can be a relay station, access point, vehicle-mounted equipment, wearable devices, or network equipment in a 5G network or a future evolved PLMN network, etc. This application embodiment is not limited to these categories. The network device can be a device in a wireless network, such as a radio access network (RAN) node that connects a terminal to a wireless network. Currently, some examples of RAN nodes include: base stations, next-generation base stations (gNBs), transmission reception points (TRPs), evolved Node Bs (eNBs), home base stations, baseband units (BBUs), or access points (APs) in WiFi systems. In a network architecture, network equipment may include centralized unit (CU) nodes, distributed unit (DU) nodes, or RAN equipment comprising both CU and DU nodes.

[0067] The first terminal device 102 and the second terminal device 103 are entities on the user side used to receive or transmit signals, such as user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device. Terminal devices can also include mobile phones, cellular phones, cordless phones, session initiation protocol (SIP) phones, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wireless terminals in self-driving vehicles, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wearable devices (such as smartwatches, smart bracelets, pedometers, etc.), terminal devices in 5G networks, or future evolved public land mobile communication networks. Terminal devices in a network (PLMN) are not limited to this in the embodiments of this application. Terminal devices can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted, or on water (such as ships), or in the air (such as airplanes, balloons and satellites).

[0068] As an example and not a limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart 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 and smart jewelry for vital sign monitoring. Furthermore, in this embodiment, the terminal can also be a terminal in an Internet of Things (IoT) system. IoT is an important component of future information technology development, and its main technical characteristic is connecting objects to networks through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. In this embodiment, IoT technology can achieve massive connectivity, deep coverage, and power saving for terminals through technologies such as narrowband (NB). Furthermore, in this embodiment, the terminal may also include sensors such as smart printers, train detectors, and gas station sensors, whose main functions include collecting data (for some terminals), receiving control information and downlink data from network devices, and transmitting uplink data to network devices by sending electromagnetic waves.

[0069] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), LTE system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunications System (UMTS) system, Enhanced Data Rate for GSM Evolution (EDGE) system, and Worldwide Interoperability for Microwave Access (WiMAX) system. The technical solutions of this application embodiment can also be applied to other communication systems, such as public land mobile network (PLMN) systems, LTE advanced (LTE-A) systems, the 5th generation (5G) systems, NR systems, machine-to-machine (M2M) systems, or other future evolution communication systems, etc., and this application embodiment does not limit them.

[0070] In this embodiment, the terminal device or network device includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux, Unix, Android, iOS, or Windows. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Furthermore, this embodiment does not specifically limit the structure of the execution entity of the method provided in this embodiment, as long as it can communicate according to the method provided in this embodiment by running a program that records the code of the method provided in this embodiment. For example, the execution entity of the method provided in this embodiment can be a terminal or network device, or a functional module in the terminal or network device that can call and execute a program.

[0071] It should be noted that, Figure 1 The number and types of terminal devices included in the network architecture shown are merely examples, and the embodiments of this application are not limited thereto. For example, it may also include more or fewer terminal devices communicating with the network devices; for the sake of brevity, they are not described one by one in the accompanying drawings. Furthermore, in situations such as... Figure 1 Although network devices and terminal devices are shown in the network architecture, the application scenario may not be limited to network devices and terminal devices. For example, it may also include core network nodes or devices used to carry virtualized network functions. These are obvious to those skilled in the art and will not be described in detail here.

[0072] Based on the network architecture described above, a communication method provided by an embodiment of this application will be described below. Please refer to... Figure 2 , Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application. The functions performed by the terminal device in this embodiment can also be performed by modules (e.g., chips) within the terminal device; similarly, the functions performed by the network device in this application can also be performed by modules (e.g., chips) within the network device. Figure 2 As shown, the communication method may include the following steps.

[0073] Step S201: The first terminal device determines the orientation of one or more directional LBTs.

[0074] Directional LBT refers to an LBT operating in a specific direction on an unlicensed frequency band within an SL (Signal Transfer Mode). Unlicensed frequency bands refer to bands outside of licensed bands, such as the 2.4GHz, 5GHz, and 6GHz bands. When the first terminal device and the second terminal device perform SL data transmission, the direction of one or more directional LBTs needs to be determined first, and LBTs are performed in that direction to facilitate subsequent SL data transmission with the second terminal device.

[0075] Step S202: The first terminal device transmits data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0076] There is a correspondence between the direction of the directional LBT and the actual transmission direction. For example, please refer to Table 1, which shows the correspondence between the direction of the directional LBT and its actual transmission direction provided in an embodiment of this application:

[0077] Table 1. Correspondence between the orientation of directional LBTs and their actual transmission directions.

[0078]

[0079]

[0080] As shown in Table 1, when the direction of the directional LBT is 0° to 60°, its corresponding actual transmission direction can be 0° to 20°, 20° to 40°, and 40° to 60°. The first terminal device can select one of these directions to transmit data with the second terminal device. The selected direction can be the direction with the best channel quality, or it can be a direction randomly selected by the first terminal device. It should be understood that the correspondence between the direction of the directional LBT and its actual transmission direction shown in Table 1 is only an example. The correspondence between the direction of the directional LBT and its actual transmission direction can be other correspondences, and does not constitute a limitation on the correspondence between the direction of the directional LBT and its actual transmission direction in this application. The direction described in this invention can be implicitly inferred from a reference signal or channel. For example, by indicating the index number of a Channel State Information-Reference Signal (CSI-RS) resource, the direction of the directional LBT or the SL transmission direction can be associated with the same direction information or the same spatial parameters as the CSI-RS resource. The reference signal can also be a channel sounding reference signal (SRS), a synchronization signal / PBCH (SSB), a tracking reference signal (TRS), a sidelink SSB (SL SSB), a sidelink CSI-RS (SL CSI-RS), or other reference signals.

[0081] After the first terminal device determines the direction of one or more directional LBTs, it can determine the actual transmission direction corresponding to the direction of the one or more directional LBTs based on the correspondence between the directional LBTs and their actual transmission directions, and then transmit data with the second terminal device in the actual transmission direction. The actual transmission direction can be one or more. The direction of the directional LBT and its actual transmission direction can be dynamically indicated by higher-layer signaling or DCI, or the correspondence (association information) between the direction of the directional LBT and its actual transmission direction can be dynamically indicated by higher-layer signaling or DCI.

[0082] Please see Figure 3 , Figure 3 This is a flowchart illustrating another communication method provided in an embodiment of this application. Figure 3This refers to the communication method under Mode-1 of SL transmission. In this embodiment, the functions performed by the terminal device can also be performed by modules (e.g., chips) within the terminal device; similarly, the functions performed by the network device in this application can also be performed by modules (e.g., chips) within the network device. Figure 3 As shown, the communication method may include the following steps.

[0083] Step S301: The network device sends first indication information to the first terminal device for determining the direction of one or more directional LBTs. Correspondingly, the first terminal device receives the first indication information from the network device for determining the direction of one or more directional LBTs.

[0084] A directional LBT can refer to an LBT operating in a specific direction on an unlicensed frequency band (SL). Unlicensed frequency bands refer to bands outside of licensed frequency bands, such as the 2.4 GHz band, 5 GHz band, and 6 GHz band. The first indication information can be information about the direction of one or more directional LBTs, or it can be information about the actual transmission direction used by the first terminal device and the second terminal device for data transmission.

[0085] The first indication information can be actively sent from the network device to the first terminal device, or it can be sent by the network device to the first terminal device after the first terminal device sends a request to the network device requesting the direction of one or more directional LBTs. This application embodiment does not limit the method by which the network device sends the first indication information. Since there may be multiple beam directions within the Channel Occupancy Time (COT) of the SL channel, the first indication information can be used to determine the direction of one or more directional LBTs.

[0086] Network devices can send first indication information to the first terminal device via DCI (for SL). Specifically, the first indication information can be indicated by fields using spatialrelation-info or Transmission Configuration Indicator (TCI-state) (QCL type-D). Both spatialrelation-info and TCI-state can carry directional information. It can be understood that the field can be an additional field indicating the direction of a directional LBT, based on existing DCI parameters such as LBT type, or a combination of existing LBT type parameters and the direction information for the directional LBT. The RS included in TCI-state can include future SL RS (e.g., CSI-RS for Beam Measurement (CSI-RS for BM), SL TRS, etc.), SLCSI-RS, or UuRS. Alternatively, network devices can also send the first indication information to the first terminal device via MAC-CE.

[0087] Step S302: The network device sends second indication information to the first terminal device to indicate the correspondence between the direction of the directional LBT and the actual transmission direction.

[0088] There is a correspondence between the direction of the directional LBT and the actual transmission direction. For a detailed description, please refer to step S202 above, which will not be repeated here. It is understood that step S302 can be executed before, after, or in parallel with step S301. This application does not limit the order in which the network device sends the first indication information and the second indication information to the first terminal device.

[0089] The second indication information can be pre-configured by the network device to the first terminal device via higher-layer signaling. For example, the second indication information can be configured by RRC.

[0090] Step S303: The first terminal device determines the orientation of one or more directional LBTs.

[0091] After receiving first indication information from the network device for determining the direction of one or more directional LBTs, the first terminal device can determine the direction of one or more directional LBTs based on the first indication information. The determination method can satisfy any of the following:

[0092] In Method 1, if the first indication information directly indicates the direction of one or more directional LBTs, the first terminal device can know the direction of one or more directional LBTs based on the received first indication information.

[0093] Method 2: If the first indication information indicates that the first terminal device and the second terminal device have a prior knowledge of the correspondence between the direction of the directional LBT and the actual transmission direction, the first terminal device can determine the direction of the LBT corresponding to the actual transmission direction based on the received first indication information and the prior knowledge of the correspondence between the direction of the directional LBT and the actual transmission direction.

[0094] Step S304: The first terminal device sends direction information for one or more directional LBTs to the second terminal device. Correspondingly, the second terminal device receives direction information for one or more directional LBTs from the first terminal device.

[0095] After the first terminal device determines the direction of one or more directional LBTs, it can send the direction information of the one or more directional LBTs to the second terminal device. The second terminal device can then listen for information from the first terminal device in these directions. The second terminal device can listen for information from the first terminal device in these directions in real time, or it can listen periodically, with a period of 1ms, 10ms, etc.

[0096] The first terminal device can send the direction information of the one or more directional LBTs to the second terminal device through SCI, RRC of PC-5 port, or MAC-CE of PC-5 port.

[0097] Step S305: The first terminal device transmits data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0098] It should be understood that step S305 corresponds to step S202. The relevant description in step S305 can be found in the description of step S202 above. To avoid repetition, it will not be repeated here.

[0099] In addition, after the first terminal device determines the direction of one or more directional LBTs, for the first method of step S303, the first terminal device performs LBT in the determined direction of one or more directional LBTs. If successful, the actual transmission direction is determined according to the correspondence between the direction of the directional LBT and its actual transmission direction, and data is sent to the second terminal device in the actual transmission direction. For the second method of step S303, the first terminal device performs LBT in the determined direction of one or more directional LBTs. If successful, data can be sent to the second terminal device in the actual transmission direction indicated by the first indication information.

[0100] In a scenario involving one first terminal device and multiple second terminal devices: when one first terminal device and multiple second terminal devices communicate simultaneously, different actual transmission directions can be used for each different first terminal device (unicast), or a wide beam of union can be used to send data to multiple second terminal devices (multicast).

[0101] Please see Figure 4 , Figure 4 This is a flowchart illustrating another communication method provided in an embodiment of this application. Figure 4 This describes a communication method for Mode-2 of SL transmission. In this embodiment, the functions performed by the terminal device can also be performed by modules (e.g., chips) within the terminal device; similarly, the functions performed by the network device in this application can also be performed by modules (e.g., chips) within the network device. Figure 4 As shown, the communication method may include the following steps.

[0102] Step S401: The second terminal device sends feedback information, including channel quality results, beam reports, and recommended directions, to the first terminal device. Correspondingly, the first terminal device receives the feedback information, including channel quality results, beam reports, and recommended directions, from the second terminal device.

[0103] Before determining one or more directional LBT directions, the first terminal device may send a request message to the second terminal device, requesting information such as channel quality results, beam reports, and recommended directions. After receiving the request message from the first terminal device, the second terminal device sends feedback information, including channel quality results, beam reports, and recommended directions, to the first terminal device.

[0104] The second terminal device can send feedback information to the first terminal device via PSSCH / PSFCH.

[0105] Step S402: The first terminal device determines the orientation of one or more directional LBTs.

[0106] After receiving feedback information from the second terminal device, including channel quality results, beam reports, and recommended directions, the first terminal device can determine the direction of one or more directional LBTs based on this feedback information. The determination method can satisfy any of the following:

[0107] In Method 1, the second terminal device can recommend data transmission directions to the first terminal device, that is, recommend one or more directional LBT directions, and the first terminal device will determine the one or more directional LBT directions recommended by the second terminal device as the target directional LBT direction.

[0108] Method 2: The first terminal device determines the direction of the one or more directional LBTs as the direction of the most recent successful transmission between the first terminal device and the second terminal device, or as the direction of the beam of the RS with the best quality in the most recent beam report.

[0109] Method 3: The first terminal device can determine the direction based on the priority of different information in the feedback information. For example, the recommended direction has the highest priority, the beam report has the second highest priority, and the channel quality result has the lowest priority. Different information is assigned corresponding weights, and one or more directional LBT directions are calculated.

[0110] Step S403: The first terminal device sends one or more directional LBT information to the second terminal device.

[0111] It should be understood that step S403 corresponds to step S304. The relevant description in step S403 can be found in the description of step S304 above. To avoid repetition, it will not be repeated here.

[0112] Step S404: The first terminal device transmits data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0113] It should be understood that step S404 corresponds to step S202. The relevant description in step S404 can be found in the description of step S202 above. To avoid repetition, it will not be repeated here.

[0114] Furthermore, the correspondence between the direction of the directional LBT and the actual transmission direction can be pre-configured by the network device to the first terminal device. For example, the network device sends second indication information to the first terminal device, which indicates the correspondence between the direction of the directional LBT and the actual transmission direction. This can be understood as the first terminal device knowing the correspondence between the direction of the directional LBT and the actual transmission direction in advance through preconfiguration.

[0115] The first terminal device can determine the actual transmission direction based on the determined directions of one or more directional LBTs and the correspondence between the directions of the directional LBTs and the actual transmission direction. In this actual transmission direction, the first terminal device and the second terminal device transmit data.

[0116] In a scenario involving one first terminal device and multiple second terminal devices: when one first terminal device and multiple second terminal devices communicate simultaneously, different actual transmission directions can be used for each different first terminal device (unicast), or a wide beam of union can be used to send data to multiple second terminal devices (multicast).

[0117] The above describes the method embodiments provided by the embodiments of this application. The following describes the virtual device embodiments involved in the embodiments of this application.

[0118] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. The device can be a terminal or a module (e.g., a chip) within the terminal. Figure 5 As shown, the device 500 includes at least: a determining unit 501 and a transmitting unit 502; wherein:

[0119] Determining unit 501 is used to determine the orientation of one or more oriented LBTs;

[0120] The transmission unit 502 is used to transmit data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs.

[0121] In one embodiment, the transmission unit 502 is further configured to:

[0122] Receive first indication information from a network device, the first indication information being used to determine the direction of the one or more directional LBTs.

[0123] In one embodiment, the determining unit 501 is specifically used for:

[0124] Receive feedback information from the second terminal device, the feedback information including channel quality results, beam reports, and recommended directions;

[0125] The directions of one or more directional LBTs are determined based on one or more of the channel quality results, the beam report, and the recommended directions.

[0126] In one embodiment, the feedback information from the second terminal device is received via PSSCH / PSFCH.

[0127] In one embodiment, the direction of the one or more directional LBTs is the direction of the most recent successful transmission between the first terminal device and the second terminal device, or the direction of the beam of the best quality RS in the most recent beam report.

[0128] In one embodiment, the transmission unit 502 is further configured to:

[0129] Receive second indication information from the network device, the second indication information being used to indicate the correspondence between the direction of the directional LBT and the actual transmission direction.

[0130] In one embodiment, the transmission unit 502 is further configured to:

[0131] After determining the direction of one or more directional LBTs, the direction information of the one or more directional LBTs is sent to the second terminal device.

[0132] In one embodiment, the direction information of the one or more directional LBTs is sent to the second terminal device via the serial communication interface SCI of SL, the RRC of PC-5 port, or the media access control element MAC-CE of PC-5 port.

[0133] In one embodiment, the first indication information is configured by downlink control information (DCI) or by media access control element (MAC-CE).

[0134] In one embodiment, the second indication information is configured by RRC.

[0135] For a more detailed description of the determining unit 501 and the transmitting unit 502, please refer directly to the above. Figure 2 The description of the terminal device in the method embodiment shown is omitted here.

[0136] Based on the above network architecture, please refer to Figure 6 , Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application. For example... Figure 6 As shown, the device 600 may include one or more processors 601, which can also be called processing units, and can implement certain control functions. The processor 601 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data from the software programs.

[0137] In an alternative design, processor 601 may also store instructions and / or data 603, which can be executed by the processor to cause device 600 to perform the methods described in the above method embodiments.

[0138] In another alternative design, the processor 601 may include a transceiver unit for implementing receiving and transmitting functions. For example, this transceiver unit may be a transceiver circuit, an interface, an interface circuit, or a communication interface. The transceiver circuit, interface, or interface circuit for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0139] In another possible design, device 600 may include circuitry that performs the functions of sending, receiving, or communicating as described in the foregoing method embodiments.

[0140] Optionally, the device 600 may include one or more memories 602, which may store instructions 604 that can be executed on the processor, causing the device 600 to perform the methods described in the above method embodiments. Optionally, the memories may also store data. Optionally, the processor may also store instructions and / or data. The processor and memory may be configured separately or integrated together. For example, the correspondence described in the above method embodiments may be stored in the memory or in the processor.

[0141] Optionally, the device 600 may further include a transceiver 605 and / or an antenna 606. The processor 601, which may be referred to as a processing unit, controls the device 600. The transceiver 605, which may be referred to as a transceiver unit, transceiver, transceiver circuit, transceiver device, or transceiver module, is used to implement transceiver functions.

[0142] Optionally, the device 600 in this application embodiment can be used to perform the actions described in this application embodiment. Figure 2 The method described in [the document / document].

[0143] In one embodiment, the communication device 600 can be a terminal device or a module (e.g., a chip) within the terminal device. When the computer program instructions stored in the memory 602 are executed, the processor 601 controls the determining unit 501 to perform the operations performed in the above embodiment, and the transceiver 605 performs the operations performed by the transmission unit 502 in the above embodiment. The transceiver 605 is also used to send information to other communication devices besides the communication device. The terminal device or the module within the terminal device can also be used to perform the above... Figure 2The various methods executed by the terminal device in the method embodiments will not be described in detail.

[0144] The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-type metal-oxide-semiconductor (NMOS), p-type metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0145] The apparatus described in the above embodiments may be a network device or a terminal device, but the scope of the apparatus described in this application is not limited thereto, and the structure of the apparatus may vary. Figure 5 The device may be a standalone device or part of a larger device. For example, the device may be:

[0146] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0147] (2) A collection of one or more ICs, optionally including a storage component for storing data and / or instructions;

[0148] (3) ASIC, such as modem (MSM);

[0149] (4) Modules that can be embedded in other devices;

[0150] (5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, machinery, home appliances, medical devices, industrial equipment, etc.

[0151] (6) Others, etc.

[0152] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. For ease of explanation, Figure 7 Only the main components of the terminal device are shown. For example... Figure 7 As shown, the terminal device 700 includes a processor, memory, control circuitry, antenna, and input / output devices. The processor is primarily used to process communication protocols and data, control the entire terminal, execute software programs, and process the data from those programs. The memory is mainly used to store software programs and data. The radio frequency (RF) circuitry is primarily used for converting baseband signals to RF signals and processing RF signals. The antenna is primarily used for transmitting and receiving RF signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0153] When the terminal device is powered on, the processor can read the software program from the storage unit, parse and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit processes the baseband signal to obtain the RF signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna. This RF signal is further converted into a baseband signal and output to the processor. The processor converts the baseband signal back into data and processes the data.

[0154] For ease of explanation, Figure 7 Only one memory and processor are shown. In actual terminal devices, multiple processors and memories may exist. Memory can also be called storage medium or storage device, etc., and this embodiment of the invention does not limit this.

[0155] As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, while the CPU is mainly used to control the entire terminal, execute software programs, and process the data of the software programs. Figure 7The processor in the terminal integrates the functions of a baseband processor and a central processing unit (CPU). Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses. It will also be understood that a terminal can include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities. The various components of the terminal can be connected via various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. Similarly, the CPU can be described as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored as a software program in a storage unit, with the processor executing the software program to implement the baseband processing function.

[0156] In one example, the antenna and control circuit with transceiver functions can be considered as the transceiver unit 701 of the terminal device 700, and the processor with processing functions can be considered as the processing unit 702 of the terminal device 700. For example... Figure 7 As shown, the terminal device 700 includes a transceiver unit 701 and a processing unit 702. The transceiver unit can also be referred to as a transceiver, transceiver device, or transceiver apparatus. Optionally, the device in the transceiver unit 701 used for receiving functions can be considered a receiving unit, and the device in the transceiver unit 701 used for transmitting functions can be considered a transmitting unit; that is, the transceiver unit 701 includes both a receiving unit and a transmitting unit. For example, the receiving unit can also be referred to as a receiver, receiver circuit, or receiving device, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit. Optionally, the receiving unit and the transmitting unit can be integrated into a single unit or can be multiple independent units. The receiving unit and the transmitting unit can be located in one geographical location or distributed across multiple geographical locations.

[0157] In one embodiment, the transceiver unit 701 is used to perform the operations performed by the transmission unit 502 in the above embodiment, and the processing unit 702 is used to perform the operations performed by the determination unit 501 in the above embodiment. The terminal device 700 can also be used to perform the above... Figure 2 The various methods executed by the terminal device in the method embodiments will not be described in detail.

[0158] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, can implement the processes related to the terminal device in the communication method provided in the above method embodiments.

[0159] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, can implement the network device-related processes in the communication method provided in the above method embodiments.

[0160] This application also provides a computer program product that, when run on a computer or processor, causes the computer or processor to execute one or more steps of any of the above-described communication methods. If the constituent modules of the aforementioned devices are implemented as software functional units and sold or used as independent products, they can be stored in the computer-readable storage medium.

[0161] This application also provides a chip system including at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a circuit. The at least one processor is used to run computer programs or instructions to perform the above-described... Figure 2 The corresponding method embodiments may describe some or all of the steps. This chip system may be composed of chips or may include chips and other discrete devices.

[0162] This application also discloses a communication system, which includes a terminal device and a network device, as detailed in the following description. Figure 2 The communication method shown.

[0163] It should be understood that the memory mentioned in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory can be a hard disk drive (HDD), a solid-state drive (SSD), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DRRAM). Memory is any other medium capable of carrying or storing desired program code having an instruction or data structure form and accessible by a computer, but is not limited thereto. The memory in the embodiments of this application may also be circuitry or any other means capable of implementing storage functions for storing program instructions and / or data.

[0164] It should also be understood that the processor mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0165] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated into the processor.

[0166] It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

[0167] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0168] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments provided herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0169] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0170] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0171] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0172] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0173] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0174] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0175] The modules / units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0176] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method, characterized in that, Applied to pass-through SL scenarios, including: The first terminal device determines the direction of one or more directional listen-before-transmit LBTs; The first terminal device transmits data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs; The first terminal device determines the orientation of one or more directional LBTs, including: The first terminal device receives first indication information from the network device, the first indication information being used to determine the direction of the one or more directional LBTs; the first terminal device determines the direction of the one or more directional LBTs based on the first indication information; or... The first terminal device receives feedback information from the second terminal device, the feedback information including channel quality results, beam reports, and recommended directions; the first terminal device determines the direction of one or more directional LBTs based on one or more of the channel quality results, beam reports, and recommended directions; The method further includes: The first terminal device receives second indication information from the network device. The second indication information is used to indicate the correspondence between the direction of at least one directional LBT and at least one actual transmission direction, wherein the direction of one directional LBT corresponds to one or more actual transmission directions, and the beamwidth of the direction of the directional LBT is greater than or equal to the beamwidth of the actual transmission direction. The actual transmission direction is obtained based on the determined orientation of the LBT and the corresponding relationship.

2. The method according to claim 1, characterized in that, The first terminal device receives the feedback information from the second terminal device through the Physical Straight-through Link Shared Channel (PSSCH) / Physical Straight-through Link Feedback Channel (PSFCH).

3. The method according to claim 1 or 2, characterized in that, The direction of the one or more directional LBTs is either the direction of the most recent successful transmission between the first terminal device and the second terminal device, or the direction of the beam of the best quality reference signal RS in the most recent beam report.

4. The method according to any one of claims 1-3, characterized in that, After the first terminal device determines the orientation of one or more directional LBTs, the method further includes: The first terminal device sends the direction information of the one or more directional LBTs to the second terminal device.

5. The method according to claim 4, characterized in that, The first terminal device sends the direction information of the one or more directional LBTs to the second terminal device through the direct link control information (SCI), the radio resource control (RRC) of the PC-5 port, or the media access control (MAC-CE) of the PC-5 port.

6. The method according to any one of claims 1-5, characterized in that, The first indication information is configured by downlink control information (DCI) or by media access control element (MAC-CE).

7. The method according to any one of claims 1-6, characterized in that, The second indication information is configured by Radio Resource Control (RRC).

8. A communication device, characterized in that, include: The determining unit is used to determine the direction of one or more directional listen-before-speech (LBT) units; The transmission unit is used to transmit data with the second terminal device in the actual transmission direction corresponding to the direction of the one or more directional LBTs; The determining unit determines the direction of one or more oriented LBTs, specifically for: Receive first indication information from a network device, the first indication information being used to determine the direction of the one or more directional LBTs; determine the direction of the one or more directional LBTs based on the first indication information; or... Receive feedback information from the second terminal device, the feedback information including channel quality results, beam reports, and recommended directions; The directions of one or more directional LBTs are determined based on one or more of the channel quality results, the beam report, and the recommended directions; A receiving unit is configured to receive second indication information from the network device, the second indication information being configured to indicate the correspondence between the direction of at least one directional LBT and at least one actual transmission direction, wherein the direction of one directional LBT corresponds to one or more actual transmission directions, and the beamwidth of the direction of the directional LBT is greater than or equal to the beamwidth of the actual transmission direction. The determining unit is further configured to obtain the actual transmission direction based on the determined direction of the directional LBT and the corresponding relationship.

9. A communication device, characterized in that, The device includes a processor, a memory, an input interface, and an output interface. The input interface is used to receive information from other communication devices besides the communication device, and the output interface is used to output information to other communication devices besides the communication device. When the stored computer program stored in the memory is invoked by the processor, the method described in any one of claims 1-7 is implemented.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or computer instructions that, when executed by a processor, cause the method described in any one of claims 1-7 to be implemented.

11. A computer program product comprising executable instructions, characterized in that, The computer program product includes a computer program or computer instructions that, when executed by a processor, cause the method described in any one of claims 1-7 to be implemented.

12. A chip system, characterized in that, The method includes at least one processor, a memory, and an interface circuit, wherein the memory, the interface circuit, and the at least one processor are interconnected via a circuit, and the at least one memory stores instructions; when the instructions are executed by the processor, the method described in any one of claims 1-7 is implemented.

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