Method in node used for wireless communications, and apparatus

Abstract

Provided in the present application are a method in a node used for wireless communications, and an apparatus, which method and apparatus are used for implementing initial beam pairing based on a sidelink synchronization signal block. The method comprises: receiving first information, wherein the first information is used for determining whether to perform a first operation, the first operation comprising at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, and the first information is used for determining whether to send a first sidelink synchronization signal block related to the first operation, and / or the first information is used for determining a sending parameter of the first sidelink synchronization signal block.

Description

Method and apparatus in a node for wireless communication Technical Field

[0001] The present application relates to the field of communication technology, and more particularly, to a method and apparatus in a node for wireless communication. Background Art

[0002] In certain scenarios for initial beam pairing in sidelink communications, using sidelink sync signal blocks, or a modified format of sidelink sync signal blocks, as reference signals for initial beam pairing has become an option. However, the transmission of sidelink sync signal blocks by user equipment must meet certain conditions. Therefore, how to perform initial beam pairing based on sidelink sync signal blocks, and how to transmit sync signal blocks when the user equipment does not meet these conditions, are technical issues that need to be addressed.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a method and apparatus in a node for wireless communication. The following introduces various aspects of the present application.

[0005] In a first aspect, a method is provided in a first node for wireless communication, comprising: receiving first information, wherein the first information is used to determine whether to perform a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment, and sidelink beam management, and the first information is used to determine whether to send a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0006] As an implementation manner, the first information indicates whether the first operation is performed; or the first information includes a first frequency, and the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0007] As an implementation method, the first information indicates to perform the first operation, and the first operation is related to the first frequency; or, the first information includes the first frequency, and the first frequency is used for the first operation; the first side synchronization signal block is sent on the first frequency.

[0008] As an implementation manner, the first information indicates that the first operation is not performed; or, the first information includes the first frequency, and the first frequency is not used for the first operation; and sending the first side synchronization signal block is abandoned.

[0009] As an implementation method, a first signal measurement is performed; wherein, whether the result of the first signal measurement is lower than a first threshold is used to determine whether to send the first side synchronization signal block, and the first information is used to determine the first threshold.

[0010] As an implementation manner, the first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds.

[0011] As an implementation, the multiple alternative thresholds include a target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is equal to the target threshold; when the first information is used to determine not to perform the first operation, the first threshold is an alternative threshold among the multiple alternative thresholds other than the target threshold.

[0012] As an implementation method, when the first information is used to determine whether to perform the first operation, the first threshold is the sum of the first reference threshold and the first threshold offset, and the first threshold offset is not 0; when the first information is used to determine not to perform the first operation, the first threshold is the first reference threshold.

[0013] As an implementation method, the sending parameters of the first side synchronization signal block include at least one of the time allocation of the first side synchronization signal block, the number of transmissions corresponding to the first side synchronization signal block, and the sending period corresponding to the first side synchronization signal block.

[0014] As an implementation manner, a first signal measurement is performed; wherein the result of the first signal measurement is used to determine the transmission parameters of the first sideline synchronization signal block.

[0015] As an implementation method, whether the result of the first signal measurement is lower than a first threshold is used to determine the sending parameters of the first side synchronization signal block; when the result of the first signal measurement is lower than the first threshold, the sending parameters of the first side synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0016] As an implementation method, the sending parameter of the first side synchronization signal block is one of multiple sets of alternative parameters, and at least one of the first information and the result of the first signal measurement is used to determine the sending parameter of the first side synchronization signal block from the multiple sets of alternative parameters.

[0017] As an implementation method, the multiple sets of alternative parameters include target parameters; when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are set to the target parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0018] As an implementation method, the multiple sets of alternative parameters include target parameters; when the result of the first signal measurement is lower than a first threshold, the sending parameters of the first side synchronization signal block are set to the target parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0019] As an implementation method, when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are determined according to the first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0020] As an implementation method, second information is received, and the second information is used to determine whether to send a second sideline synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

[0021] According to a second aspect, a method is provided in a second node for wireless communication, comprising: sending first information to a first node, wherein the first information is used to determine whether the first node performs a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment, and sidelink beam management, and the first information is used to determine whether the first node sends a first sidelink synchronization signal block related to the first operation, and / or the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0022] As an implementation manner, the first information indicates whether the first node performs the first operation; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0023] As an implementation method, second information is sent to the first node, and the second information is used to determine whether the first node sends a second side synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for the first node to perform side communication or side discovery, and the side communication is related to the second side synchronization signal block.

[0024] According to a third aspect, a method is provided in a third node for wireless communication, comprising: performing reception of a first sidelink synchronization signal block on a first frequency; wherein the first sidelink synchronization signal block is related to a first operation, the first operation comprising at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, first information is used to determine whether the first node performs the first operation, the first information is also used to determine whether the first node sends the first sidelink synchronization signal block, and / or the first information is also used to determine the sending parameters of the first sidelink synchronization signal block.

[0025] As an implementation manner, the first information indicates whether the first node performs the first operation; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0026] As an implementation manner, the received first sideline synchronization signal block is used to perform the first operation.

[0027] In a fourth aspect, a first node for wireless communication is provided, comprising: a first receiver for receiving first information, wherein the first information is used to determine whether to perform a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, and the first information is used to determine whether to send a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0028] As an implementation manner, the first information indicates whether the first operation is performed; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0029] As an implementation method, the first information indicates to perform the first operation, and the first operation is related to the first frequency; or, the first information includes the first frequency, and the first frequency is used for the first operation; the first node also includes a first transmitter for sending the first side synchronization signal block on the first frequency.

[0030] As an implementation method, the first information indicates that the first operation is not performed; or, the first information includes a first frequency, and the first frequency is not used for the first operation; the first node also includes a second transmitter for abandoning sending the first side synchronization signal block.

[0031] As an implementation method, the first node also includes a first processor for performing a first signal measurement; wherein, whether the result of the first signal measurement is lower than a first threshold is used to determine whether to send the first side synchronization signal block, and the first information is used to determine the first threshold.

[0032] As an implementation manner, the first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds.

[0033] As an implementation, the multiple alternative thresholds include a target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is equal to the target threshold; when the first information is used to determine not to perform the first operation, the first threshold is an alternative threshold among the multiple alternative thresholds other than the target threshold.

[0034] As an implementation method, when the first information is used to determine whether to perform the first operation, the first threshold is the sum of the first reference threshold and the first threshold offset, and the first threshold offset is not 0; when the first information is used to determine not to perform the first operation, the first threshold is the first reference threshold.

[0035] As an implementation method, the sending parameters of the first side synchronization signal block include at least one of the time allocation of the first side synchronization signal block, the number of transmissions corresponding to the first side synchronization signal block, and the sending period corresponding to the first side synchronization signal block.

[0036] As an implementation manner, the first node further includes a second processor for performing a first signal measurement; wherein a result of the first signal measurement is used to determine a transmission parameter of the first sidelink synchronization signal block.

[0037] As an implementation method, whether the result of the first signal measurement is lower than a first threshold is used to determine the sending parameters of the first side synchronization signal block; when the result of the first signal measurement is lower than the first threshold, the sending parameters of the first side synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0038] As an implementation method, the sending parameter of the first side synchronization signal block is one of multiple sets of alternative parameters, and at least one of the first information and the result of the first signal measurement is used to determine the sending parameter of the first side synchronization signal block from the multiple sets of alternative parameters.

[0039] As an implementation method, the multiple sets of alternative parameters include target parameters; when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are set to the target parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0040] As an implementation method, the multiple sets of alternative parameters include target parameters; when the result of the first signal measurement is lower than a first threshold, the sending parameters of the first side synchronization signal block are set to the target parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0041] As an implementation method, when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are determined according to the first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0042] As an implementation method, the first receiver is also used to receive second information, and the second information is used to determine whether to send a second sideline synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

[0043] In a fifth aspect, a second node for wireless communication is provided, comprising: a third transmitter for sending first information to a first node, wherein the first information is used to determine whether the first node performs a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment, and sidelink beam management, and the first information is used to determine whether the first node sends a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0044] As an implementation manner, the first information indicates whether the first node performs the first operation; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0045] As an implementation method, the third transmitter is also used to send second information to the first node, and the second information is used to determine whether the first node sends a second side synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for the first node to perform side communication or side discovery, and the side communication or the side discovery is related to the second side synchronization signal block.

[0046] In the sixth aspect, a third node for wireless communication is provided, comprising: a second receiver for performing reception of a first sidelink synchronization signal block on a first frequency; wherein the first sidelink synchronization signal block is related to a first operation, the first operation comprising at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, the first information is used to determine whether the first node performs the first operation, the first information is also used to determine whether the first node sends the first sidelink synchronization signal block, and / or the first information is also used to determine the sending parameters of the first sidelink synchronization signal block.

[0047] As an implementation manner, the first information indicates whether the first node performs the first operation; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0048] As an implementation manner, the received first sideline synchronization signal block is used to perform the first operation.

[0049] In the seventh aspect, a first node used for wireless communication is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the first node executes the method described in any implementation method of the first aspect.

[0050] In the eighth aspect, a second node used for wireless communication is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the second node executes the method described in any implementation method of the second aspect.

[0051] In the ninth aspect, a third node used for wireless communication is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the third node executes the method described in any implementation method of the third aspect.

[0052] In a tenth aspect, an embodiment of the present application provides a communication system, which includes the first node and / or the second node and / or the third node described above. In another possible design, the system may also include other devices that interact with the first node, the second node, or the third node in the solution provided in the embodiment of the present application.

[0053] In the eleventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program enables a computer to execute part or all of the steps in the methods of the above aspects.

[0054] In a twelfth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0055] In the thirteenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0056] In this embodiment of the present application, the first information received by the first node may indicate whether to perform initial beam pairing. Therefore, whether to perform initial beam pairing can serve as a condition for whether the first node sends a side synchronization signal block, thereby facilitating effective initial beam pairing between the first node and other nodes via S-SSB.

[0057] In an embodiment of the present application, the first node can determine whether to send the side synchronization signal block according to the indication of the first information, thereby achieving necessary and effective sending of the side synchronization signal block by the first node.

[0058] In this embodiment of the present application, any two nodes in sideline communication perform initial beam pairing before establishing a sideline unicast link. Using paired beams to establish a unicast link can increase the link range between the sending and receiving nodes, enabling more nodes to realize advanced business use cases.

[0059] In an embodiment of the present application, by performing initial beam pairing before establishing a side unicast link, the sending node can effectively avoid sending direct communication request messages with high resource overhead on all beams through beam scanning, thereby significantly reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application is applicable.

[0061] FIG2 is a schematic diagram of the time slot structure of the side synchronization signal block.

[0062] FIG3 is a schematic diagram of the conditions for the UE to send a side synchronization signal block.

[0063] FIG4 is a schematic flow chart of a method in a first node for wireless communication provided in an embodiment of the present application.

[0064] FIG5 is a schematic flow chart of an implementation method of initial beam pairing in the first operation.

[0065] FIG6 is a flowchart illustrating another implementation of initial beam pairing in the first operation.

[0066] FIG7 is a flow chart showing an implementation method of establishing a side unicast link in the first operation.

[0067] FIG8 is a flow chart of a possible implementation of the method shown in FIG4 .

[0068] FIG9 is a structural diagram of a possible implementation of the first S-SSB.

[0069] FIG10 is a flow chart of another possible implementation of the method shown in FIG4 .

[0070] FIG11 is a flow chart of another possible implementation of the method shown in FIG4 .

[0071] FIG12 is a flowchart of another possible implementation of the method shown in FIG4 .

[0072] FIG13 is a flow chart of another possible implementation of the method shown in FIG4 .

[0073] FIG14 is a flow chart of another possible implementation of the method shown in FIG4 .

[0074] FIG15 is a flowchart of another possible implementation of the method shown in FIG4 .

[0075] FIG16 is a schematic structural diagram of a first node for wireless communication provided in an embodiment of the present application.

[0076] FIG17 is a schematic structural diagram of a second node for wireless communication provided in an embodiment of the present application.

[0077] FIG18 is a schematic structural diagram of a third node for wireless communication provided in an embodiment of the present application.

[0078] FIG19 is a schematic structural diagram of the device provided in an embodiment of the present application.

[0079] Figure 20 is a schematic diagram of the hardware modules of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. With respect to the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0081] Figure 1 is a diagram illustrating a system architecture of a wireless communication system 100 applicable to an embodiment of the present application. The wireless communication system 100 may include a network device 110 and user devices 121 to 129. The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminals within the coverage area.

[0082] In some implementations, user equipment (UE) can communicate with other user devices via a sidelink (SL). Sidelink communication may also be referred to as proximity-based services (ProSe) communication, unilateral communication, sidelink communication, device-to-device (D2D) communication, etc.

[0083] In other words, sidelink data is transmitted between user equipments via a sidelink. The sidelink data may include data and / or control signaling. In some implementations, the sidelink data may be, for example, a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a PSSCH DMRS, a physical sidelink feedback channel (PSFCH), etc.

[0084] The following describes several common sidelink communication scenarios with reference to Figure 1. Sidelink communication can be categorized into three scenarios, depending on whether the user device in the sidelink is within the coverage of the network device. Scenario 1: The user device conducts sidelink communication within the coverage of the network device. Scenario 2: Some user devices conduct sidelink communication within the coverage of the network device. Scenario 3: The user device conducts sidelink communication outside the coverage of the network device.

[0085] As shown in Figure 1, in scenario 1, user equipments 121-122 can communicate via a sidelink, and user equipments 121-122 are all within the coverage of network device 110, or in other words, user equipments 121-122 are all within the coverage of the same network device 110. In this scenario, network device 110 can send configuration signaling to user equipments 121-122, and accordingly, user equipments 121-122 communicate via the sidelink based on the configuration signaling.

[0086] As shown in Figure 1, in scenario 2, user equipment 123-124 can communicate via a sidelink, and user equipment 123 is within the coverage of network device 110, while user equipment 124 is outside the coverage of network device 110. In this scenario, user equipment 123 receives configuration information from network device 110 and communicates via the sidelink based on the configuration signaling. However, for user equipment 124, since user equipment 124 is outside the coverage of network device 110, it cannot receive the configuration information of network device 110. In this case, user equipment 124 can obtain the configuration of the sidelink communication based on pre-configuration configuration information and / or configuration information sent by user equipment 123 within the coverage area, so as to communicate with user equipment 123 via the sidelink based on the obtained configuration.

[0087] In some cases, the user equipment 123 may send the configuration information to the user equipment 124 via a physical sidelink broadcast channel (PSBCH) to configure the user equipment 124 to communicate via the sidelink.

[0088] As shown in Figure 1, in scenario 3, user equipments 125-129 are all outside the coverage of network device 110 and cannot communicate with network device 110. In this case, the user equipments can all perform sidelink communication based on pre-configured information.

[0089] In some cases, user devices 127-129 located outside the coverage area of ​​the network device can form a communication group, and the user devices 127-129 in the communication group can communicate with each other. In addition, user device 127 in the communication group can serve as a central control node, also known as a cluster header (CH), and correspondingly, user devices in other communication groups can be referred to as "group members."

[0090] It should be noted that Figure 1 exemplarily shows a network device and multiple user devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage range of each network device may include other numbers of user devices. This embodiment of the present application does not limit this.

[0091] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0092] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0093] The user equipment in the embodiment of the present application may also be referred to as a terminal device, an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or a user device. The user equipment in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with a wireless connection function, a vehicle-mounted device, etc. The user equipment in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a vehicle, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the user equipment may act as a base station. For example, a user device can act as a dispatching entity, providing sidelink signals between user devices in vehicle-to-everything (V2X) or D2D networks. For example, a cell phone and a car can communicate with each other using sidelink data. A cell phone and a smart home device can also communicate with each other without relaying the communication signal through a base station.

[0094] The network device in the embodiments of the present application may be a device for communicating with a user equipment, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the user equipment to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), access point (AP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0095] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0096] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0097] The network equipment and user equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water; can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and user equipment are located.

[0098] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0099] For ease of understanding, some relevant technical knowledge involved in the embodiments of this application is first introduced. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0100] It should be understood that the interpretation of the terminology in the embodiments of the present application can refer to the specification protocols TS36 series, TS37 series and TS38 series of the 3rd Generation Partnership Project (3GPP), but can also refer to the specification protocols of the Institute of Electrical and Electronics Engineers (IEEE).

[0101] With the development of communication technology, technical research and standardization of sideline communication are gradually being carried out. The sideline communication developed in the RAN of 5G NR Release-16 (Rel-16) is mainly used to support advanced V2X applications. In Rel-17, the System Architecture 2 (SA2) Working Group specifically studies and standardizes ProSe, including public safety and commercial related services. As part of Rel-17, in order to save power consumption for battery-constrained users and improve the reliability of sideline communication, the Radio Access Network Working Group 1 (RAN1) and RAN2 developed power saving technologies (such as partial sensing, discontinuous reception (DRX) and inter-UE coordination (IUC) technology).

[0102] The application areas of side-by-side communication are also gradually expanding. For example, although NR SL was originally developed to support V2X applications, the industry is increasingly keen to expand NR SL to more commercial use cases. For example, highly automated driving technology requires sharing a large amount of sensor information between vehicles.

[0103] The continuous expansion of sidelink communication applications is placing higher demands on NR SL. These requirements include two key requirements: increasing sidelink data rates and supporting more new carriers on the sidelink. Adding more new carriers expands the transmission bandwidth, further increasing the data rate.

[0104] According to 3GPP project RP-222806, the research on supporting new carriers in the NR SL evolution of Rel-18 focuses on sidelink beam management (SL BM). Sidelink beam management typically includes initial beam-pairing, beam maintenance, and beam failure recovery (BFR).

[0105] The relationship between PC5 / sidelink unicast link establishment and sidelink initial beam pairing includes the following three candidate procedures:

[0106] Alternative process 1: Perform initial beam pairing before establishing the sidelink unicast link between UE1 and UE2;

[0107] Alternative process 2: Perform initial beam pairing during the sidelink unicast link establishment process between UE1 and UE2;

[0108] Alternative process three: Initial beam pairing starts after the sidelink unicast link between UE1 and UE2 is established.

[0109] For the reference signal used in alternative process 1, the 3GPP RAN1 meeting has agreed to use the sidelink synchronization broadcast signal block (SL synchronization signal / physical sidelink broadcast channel block, S-SS / PSBCH block, S-SSB) or an improved format based on S-SSB as an optional solution.

[0110] In the traditional NR S-SSB design, S-SSB consists of the sidelink primary synchronization signal (S-PSS), the sidelink secondary synchronization signal (S-SSS) and the PSBCH. Typically, S-SSB occupies one time slot in the time domain. S-SSB uses the numerology configured by the SL bandwidth part (BWP), including subcarrier spacing and cyclic prefix (CP) length. In an SL BWP, the transmission of S-SSB cannot be frequency division multiplexed (FDM) with the transmission of other sidelink physical channels. Therefore, invalid S-SSB(s) transmission not only increases resource consumption, but also seriously affects the available resources of other physical SL channels / signals.

[0111] For ease of understanding, the structure of a time slot of S-SSB is exemplarily illustrated below in conjunction with Figure 2. Referring to Figure 2, in a time slot of S-SSB, there are S-PSS and S-SSS, PSBCH, and the last guard symbol, which occupy two symbols respectively. In the structure shown in Figure 2, in an S-SSB time slot of a normal CP, the first symbol (i.e., the first PSBCH symbol) can be used for automatic gain control (AGC), the second and third symbols are used to carry S-PSS, the fourth and fifth symbols are used to carry S-SSS, the last symbol is used as a guard symbol, and the other symbols are used to carry PSBCH.

[0112] As shown in Figure 2, the S-SSB spans 11 common resource blocks (Common RBs) in a SL BWP in the frequency domain, or 132 subcarriers. The S-PSS and S-SSS occupy 127 subcarriers. The frequency domain location of the S-SSB in the SL BWP is preconfigured or configured. Therefore, S-SSB-receiving UEs (including UE1) do not need to perform blind detection in the frequency domain to find the S-SSB.

[0113] The UE sends S-SSB to expand the coverage of the synchronization reference source. Specifically, in NR SL, the global navigation satellite system (GNSS), gNB / eNB and NR SL UE (i.e., synchronization reference UE, SyncRefUE) can all be used as the synchronization reference source for a UE. SyncRefUE can send synchronization information (e.g., S-SSB) to enable surrounding UEs to have the same timing reference.

[0114] In traditional S-SSB designs, one or more S-SSBs are transmitted in a fixed period (i.e., 160ms, 16 radio frames). The number of S-SSBs transmitted in an S-SSB period is preconfigured or configurable, depending on the subcarrier spacing (SCS) and frequency range, as shown in Table 1. Table 1 shows the number of S-SSBs transmitted in an S-SSB period.

[0115] Table 1

[0116] The above describes multiple alternative processes for performing initial beam pairing. As an example, the operation process of alternative process 1 using S-SSB as the reference signal to perform initial beam pairing can be as follows:

[0117] UE1 sends multiple S-SSBs using beam sweeping.

[0118] UE2 performs reference signal received power (RSRP) measurement on the sidelink synchronization signal (SLSS) and / or PSBCH, and UE2 determines the transmit beam of UE1 and the receive beam of UE2 based on the measured RSRP;

[0119] For the determined transmitting beam of UE1, UE2 reports the associated beam.

[0120] However, in the traditional NR SL design, UE1 must meet certain conditions to send S-SSB. The following example illustrates a case where UE1 does not need to send S-SSB.

[0121] UE1 does not need to send S-SSB when performing SL transmission with a UE that uses the same SL timing reference. For example, by detecting the S-SSB sent by the SyncRefUE, UE1 can synchronize with the SyncRefUE and estimate the starting position and carrier frequency offsets of the radio frame. Furthermore, through the SL timing reference provided by the SyncRefUE, UE1 can perform SL transmission with other nearby UEs (including UE2) that use the same SL timing reference. In other words, UE1 does not have to send S-SSB when performing SL transmission, that is, not all UE1s need to become SyncRefUEs.

[0122] In a traditional NR SL system, when a SL UE meets certain conditions, it is not necessary to send an S-SSB. For example, when the SL UE is synchronized with a SyncRefUE or a cell, and the RSRP measurement result is higher than a threshold, the SL UE does not need to send an S-SSB. For ease of understanding, the following describes the scenario of determining whether to send an S-SSB based on the RSRP measurement result and the threshold value in conjunction with Figure 3.

[0123] The architecture shown in Figure 3 includes network device 310 and UEs 321 to 323. Network device 310 can be a gNB or an eNB. The coverage of network device 310 is illustrated by circular boundary line 334. As shown in Figure 3, UEs 321 and 322 are within the coverage of network device 310, while UE 323 is outside the coverage of network device 321.

[0124] 3 , within the coverage area of ​​network device 310, a boundary line 332 is determined based on a configured threshold. Within the area within boundary line 332, the RSRP is greater than or equal to the configured threshold. Within the annular area between boundary line 332 and boundary line 334, the RSRP is less than the configured threshold.

[0125] Since UEs with RSRP measurement results above the configured threshold do not need to transmit S-SSBs, UE 321 within boundary line 332 does not transmit S-SSBs. In contrast, UE 322 between boundary line 332 and boundary line 334 becomes a SyncRefUE and transmits S-SSBs.

[0126] Continuing with FIG3 , since UE 322 becomes a SyncRefUE, the coverage area of ​​UE 322 is illustrated by a circular boundary line 344. Within this coverage area, a boundary line 342 can be determined based on a preconfigured threshold. In the area within boundary line 342, the RSRP is greater than or equal to the preconfigured threshold. In the circular area between boundary line 342 and boundary line 344, the RSRP is less than the preconfigured threshold.

[0127] As shown in Figure 3, UE 323 outside the coverage of network device 321 receives S-SSBs from SyncRefUE (UE 322). Since the RSRP measured by UE 323 is less than the pre-configured threshold, UE 323 also becomes a SyncRefUE.

[0128] The above, combined with Figure 3, describes multiple scenarios in which UE1 does not send S-SSB in a traditional SL design. In these scenarios, if the relevant SL design is still used, the initial beam pairing process using S-SSB will not be possible when the UE1 does not send S-SSB even though it meets the conditions.

[0129] In addition, when UE1 can send S-SSB as a SyncRefUE, similar to the SSB of NR Uu, the traditional NR SL can also send multiple S-SSBs through different beams, that is, beam scanning. Unlike the SSB of NR Uu (when the UE identifies the best beam-formed SSB, the UE can indicate the identified SSB / beam to the network device through the uplink physical random access channel (PRACH), NR SL does not have PRACH, and the UE as a SyncRefUE cannot know which UE(s) received the S-SSBs it sent.

[0130] In summary, in an SL BWP, invalid S-SSB(s) transmission not only increases resource consumption, but also seriously affects the available resources of other physical SL channels / signals; if the transmission conditions of S-SSB(s) are too stringent, it may cause the UE to be unable to perform initial beam pairing before the side unicast link is established, which also increases resource overhead.

[0131] Therefore, for SLBM, how to resolve the initial beam pairing through S-SSB is a technical problem that needs to be solved. Furthermore, in the scenario where initial beam pairing is performed based on S-SSB, the transmission of S-SSB when the UE is not a synchronization reference source is also a technical problem that needs to be solved. Furthermore, how UE1, which sends the S-SSB, identifies UE2, which receives the S-SSB, and the transmit and receive beam pair determined by UE2 are also technical problems that need to be solved.

[0132] To address some of the aforementioned issues, an embodiment of the present application proposes a method for a first node in wireless communication. Using this method, the first node determines whether to perform initial beam pairing and / or establish a sidelink unicast link based on the indication of the first information, and further determines whether to send the relevant sidelink synchronization signal block. In other words, the present application introduces the new condition of whether to perform initial beam pairing to determine whether to send the sidelink synchronization signal block. This allows the sidelink synchronization signal block to effectively perform initial beam pairing while ensuring resource reduction.

[0133] It should be noted that the beam mentioned in the embodiments of the present application may include or be replaced by at least one of the following: beam, physical beam, logical beam, spatial filter, spatial parameter, spatial domain filter, spatial domain transmission filter, spatial domain reception filter, antenna port. The meanings of these expressions may be consistent, and the embodiments of the present application do not distinguish between them.

[0134] The following is a detailed description of the method embodiment of the present application in conjunction with the accompanying drawings. Figure 4 is a schematic flow chart of the method in the first node for wireless communication provided by an embodiment of the present application. The dotted line in Figure 4 indicates that the process is optional.

[0135] The method shown in FIG4 includes step S410 and step S420. Step S420 is an optional process. It should be understood that the method shown in FIG4 can be performed by the first node.

[0136] In some implementations, the first node can be any of the user devices described above for sidewalk communication. For example, the first node can be a vehicle in V2X or a V2X infrastructure. In some implementations, the first node can be located within or outside the network coverage area. When within the network coverage area, the first node can perform sidewalk communication based on the configuration of the network device.

[0137] As an embodiment, the first node may be a network-controlled repeater (NCR).

[0138] As an embodiment, the first node may be a user equipment, for example, the user equipments 121 to 129 shown in FIG1 .

[0139] As an embodiment, the first node may be a relay, such as a relay terminal.

[0140] Referring to FIG. 4 , in step S410 , first information is received.

[0141] The first node can receive the first information in a variety of ways. In some embodiments, the first node can receive the first information via another node that interacts with it. The other node can be a network device or a user device other than the first node. In some embodiments, the first node can receive the first information via a higher layer of its own.

[0142] In some embodiments, the sender of the first information may be a communications device interacting with the first node. For example, the sender of the first information may be a network device providing services to the first node. This network device may also be referred to as a second node. For example, the second node sends the first information to the first node. For example, the sender of the first information may be another network-side device other than the second node.

[0143] As an embodiment, the sender of the first information is a base station. The base station can provide communication services for the area where the first node is located.

[0144] In some embodiments, the sender of the first information may be a higher layer corresponding to the first node. The higher layer may send the first information to a lower layer or a lower layer of the first node. For example, the first information may be sent layer by layer from the radio resource control (RRC) layer corresponding to the first node to the physical layer. For another example, the first information may be sent from the media access control (MAC) layer corresponding to the first node to the physical layer.

[0145] As an embodiment, the sender of the first information is a higher layer of the first node. For example, the first information is received from a higher layer of the first node, where the first information is used to indicate whether to perform initial beam pairing based on S-SSB.

[0146] As an embodiment, the higher layer of the first node includes at least one of an RRC layer and a MAC layer.

[0147] The first node may determine whether to perform the first operation based on the first information. In other words, the first information is used to determine whether to perform the first operation.

[0148] As an embodiment, the first information is used to determine whether to perform the first operation.

[0149] As an embodiment, the first information is used to determine not to perform the first operation.

[0150] The first operation includes at least one of initial beam pairing, sidewalk unicast link establishment, and sidewalk beam management. In some embodiments, the first operation is at least one of initial beam pairing, sidewalk unicast link establishment, and sidewalk beam management.

[0151] The initial beam pairing is used to match the transmit beam and receive beam of the first node and the third node. The third node may be a user equipment or a relay other than the first node.

[0152] As an embodiment, the initial beam pairing is a side-by-side initial beam pairing.

[0153] In some embodiments, the initial beam pairing process may refer to the pairing process of other communication systems (e.g., NR), and the relevant process may be improved according to the characteristics of the sideline communication system.

[0154] As an embodiment, the initial beam pairing process includes two processes: coarse beam pairing and fine beam pairing.

[0155] For ease of understanding, the initial beam pairing process including coarse pairing and fine pairing is exemplarily described below with reference to Figure 5. As shown in Figure 5, the sideline receive beam of UE1 is initially paired with the sideline transmit beam of UE2.

[0156] 5 , in step S510 , a rough pairing is completed between UE2 transmitting beam A and UE1 receiving beam 2 .

[0157] In step S520, UE1 uses three narrower beams, 2-1, 2-2, and 2-3, to receive the signal transmitted by beam A, perform measurements, and perform refined pairing. UE1 configures three narrow beams in beam 2, and UE2 transmits signals multiple times.

[0158] Subsequently, UE1 selects a narrow beam as a receiving beam for UE2's transmitting beam A based on the measurement result.

[0159] As an embodiment, the initial beam pairing process includes coarse beam pairing.

[0160] For ease of understanding, the following illustrative example illustrates the initial beam pairing process, including coarse pairing, with reference to Figure 6. As shown in Figure 6, UE1's sideways transmit beam is initially paired with UE2's sideways receive beam. Referring to Figure 6, UE1 transmits four beams using beam scanning. UE2 measures each of UE1's four transmit beams using two receive beams. Based on the measurement results, UE2 determines the matching UE1 transmit beam and UE2 receive beam and notifies UE1 of the matching pair.

[0161] The sidelink unicast link establishment procedure is used by a first node to establish a sidelink unicast link with a third node. The third node is a user equipment (UE) or relay with which the first node desires to conduct sidelink communications. For ease of understanding, the following illustrates one implementation of the sidelink unicast link establishment procedure using UE1 and UE2 in Figure 7 as an example.

[0162] 7 , in step S710 UE1 sends a direct communication request (DCR) to UE2. UE1 requests UE2 to establish a sidelink unicast link by sending the DCR.

[0163] In step S720, UE2 feeds back a direct communication accept to UE1. According to the feedback from UE2, UE1 and UE2 complete the process of establishing the sidelink unicast link.

[0164] In some embodiments, the sidewalk unicast link establishment process may include initial beam pairing. For example, when the initial beam pairing is performed before the unicast link is established, the sidewalk unicast link establishment process may be considered to include performing the initial beam pairing.

[0165] As previously mentioned, sidewalk beam management includes processes such as initial beam pairing, beam maintenance, and beam failure recovery. These multiple processes enable the first node to perform stable sidewalk communications within a larger link range. The beam maintenance and beam failure recovery processes can refer to the implementation processes of other communication systems (e.g., NR), and the relevant processes can also be improved based on the characteristics of the sidewalk communication system.

[0166] In some embodiments, the first operation may be initial beam pairing for sideline communication. For example, the first operation may be initial beam pairing before establishing a sideline unicast link. In some embodiments, the first operation may be sideline unicast link establishment. For example, the sideline unicast link establishment may include an initial beam pairing process. For another example, for a user device located in the center of a cell, due to the good coverage of the base station, the user device may not need to perform initial beam pairing to establish a sideline unicast link. In some embodiments, the first operation may be initial beam pairing and sideline unicast link establishment.

[0167] The first information may indicate whether to perform the first operation in various ways such as direct indication or implicit indication.

[0168] In some embodiments, the first information is used to directly indicate whether to perform the first operation. For example, the first information can be directly indicated by "yes" or "no" information.

[0169] In one embodiment, the first information is used to instruct the first node whether to perform initial beam pairing. For example, the first information may directly instruct the first node to perform initial beam pairing before establishing a sidelink unicast link. In another example, the first information may directly instruct the first node not to perform initial beam pairing before establishing a sidelink unicast link.

[0170] As an embodiment, the first information is used to instruct the first node whether to perform side unicast link establishment. For example, the first information may directly instruct the first node to perform side unicast link establishment. For another example, the first information may directly instruct the first node not to perform side unicast link establishment.

[0171] In some embodiments, the first information may be implicitly indicated by the included information content. For example, the first information includes a first frequency, and the first frequency may or may not be used to perform the first operation. When the first frequency is used to perform the first operation, the first node may perform the first operation based on this information. When the first frequency is not used to perform the first operation, the first node does not perform the first operation.

[0172] In one embodiment, the first frequency is used for initial beam pairing with the first node. For example, when the first node receives first information including the first frequency, initial beam pairing is performed; when the first node receives first information not including the first frequency, initial beam pairing is not performed.

[0173] As an embodiment, the first frequency is not used for the first node to perform initial beam pairing. For example, when the frequency in the first information received by the first node only includes the first frequency, the first node does not perform initial beam pairing.

[0174] As an embodiment, the first frequency is used by the first node to establish a side unicast link. For example, when the first node receives first information including the first frequency, the side unicast link is established; when the first node receives first information not including the first frequency, the side unicast link is not established.

[0175] As an embodiment, the first frequency is not used for the first node to establish a sidelink unicast link. For example, when the frequency in the first information received by the first node only includes the first frequency, the first node does not establish a sidelink unicast link.

[0176] As an embodiment, the initial beam pairing is performed at the first frequency. The initial beam pairing is performed at the first frequency, that is, the first frequency is used for the initial beam pairing.

[0177] As an embodiment, the sidelink unicast link establishment is performed on the first frequency. The sidelink unicast link establishment is performed on the first frequency, that is, the first frequency is used for the sidelink unicast link establishment.

[0178] In some embodiments, the first information may include multiple information or signaling according to the sending mode. For example, when the sender of the first information is a higher layer, the first information may include signaling or parameters indicated by the higher layer.

[0179] As an embodiment, the first information includes higher-layer information. The higher-layer information may be information about the first operation sent down from higher layers relative to the physical layer. For example, the first information may be an RRC signaling, or the first information may be carried in the RRC signaling.

[0180] As an embodiment, the first information includes an RRC layer signaling.

[0181] As an embodiment, the first information includes an RRC information element (IE). For example, the first information may be carried in an RRC IE. For another example, the first information may include initial beam pairing indication signaling newly configured by the RRC layer.

[0182] The first information is also used by the first node to determine whether to send a first sideline synchronization signal block associated with the first operation.

[0183] In some embodiments, the sidelink synchronization signal block can be represented as an S-SSB (sidelink-synchronization signal block). In some embodiments, the sidelink synchronization signal block can also be represented as an S-SS / PBCH block, which is not limited in the embodiments of the present application. It should be noted that this document uses the sidelink synchronization signal block represented as an S-SSB as an example for introduction. Of course, the S-SSB in this document can be replaced by an S-SS / PBCH block. For simplicity, the first S-SSB is used below to represent the first sidelink synchronization signal block.

[0184] In some embodiments, whether to perform the first operation may be a condition for the first node to send the first S-SSB.

[0185] As an embodiment, the first information is used to determine to perform the first operation and send the first S-SSB.

[0186] As an embodiment, the first information is used to determine not to perform the first operation and to abandon sending the first S-SSB.

[0187] The first S-SSB related to the first operation can be replaced by: the first operation or part of the first operation is performed based on the first S-SSB, or the first S-SSB is used to perform the first operation or part of the first operation. That is, when the first node sends the first S-SSB, it is sent in response to the execution requirement of the first operation or part of the first operation. For example, when the first operation is initial beam pairing, the first S-SSB can be used to perform the initial beam pairing.

[0188] As an embodiment, the first side synchronization signal block is used for the first operation.

[0189] As an embodiment, the first sideline synchronization signal block is used for the first operation, and the first sideline synchronization signal block is used for sideline communication or sideline discovery.

[0190] As an embodiment, the first sideline synchronization signal block is used for the first operation, and the first sideline synchronization signal block is used for synchronization or selection of a synchronization reference.

[0191] As an embodiment, the first sideline synchronization signal block is used for the first operation, and the first sideline synchronization signal block is used for sideline communication or sideline discovery and for synchronization or selection of a synchronization reference.

[0192] As an embodiment, the initial beam pairing is based on the first S-SSB.

[0193] As an embodiment, the first S-SSB is used for the initial beam pairing.

[0194] As an embodiment, the sidelink unicast link establishment is based on the first S-SSB.

[0195] As an embodiment, the first S-SSB is used for the sidelink unicast link establishment.

[0196] The first S-SSB may follow the relevant structural design, or may use an updated format of the original S-SSB. In some embodiments, the first S-SSB may include S-PSS, S-SSS, and PSBCH, or may only include part of the content of S-PSS, S-SSS, and PSBCH, and may also include information for identification by a third node receiving the first S-SSB. When the first S-SSB carries identification information, it helps the third node to receive the first S-SSB based on the information and identify which node sent the first S-SSB. Exemplarily, the identification information carried by the first S-SSB may include the identifier (source identifier) ​​and / or destination identifier of the first node, and may also include the source identifier and / or destination identifier in layer 1 (layer 1, L1), so that the receiving node can effectively identify the destination and beam determination information.

[0197] As an embodiment, the first S-SSB for the first operation uses the format of the current S-SSB.

[0198] As an embodiment, the first S-SSB for the first operation uses an updated format of the current S-SSB.

[0199] In one embodiment, the first S-SSB includes at least one of an S-PSS, an S-SSS, and a PSBCH. For example, the first S-SSB may include only an S-PSS and an S-SSS. For another example, the first S-SSB may include only an S-PSS and a PSBCH.

[0200] As an embodiment, the first S-SSB carries the identifier of the first node. By carrying the identifier of the first node in the first S-SSB, a node detecting the first S-SSB can effectively identify which sending node it comes from.

[0201] As an embodiment, the first S-SSB carries at least one of a source identifier, a destination identifier, an L1 source identifier, and an L1 destination identifier. By carrying the source identifier and / or the destination identifier in the first S-SSB, a node detecting the first S-SSB can effectively identify which sending node it comes from and / or whether it belongs to the target node of the first S-SSB.

[0202] As an embodiment, the initial beam pairing is performed between the first node and the target node. When the third node receiving the first S-SSB is the target node, the initial beam pairing can be performed with the first node.

[0203] As an embodiment, the side unicast link establishment is performed between the first node and the target node. When the third node receiving the first S-SSB is the target node, the side unicast link can be established with the first node.

[0204] In some embodiments, the first node may determine whether to send the first S-SSB based on the first information's indication of the first operation. For example, when the first information indicates that the first operation is to be performed, the first node sends the first S-SSB associated with the first operation. For another example, when the first frequency included in the first information is used for the first operation, the first node sends the first S-SSB. For another example, when the first information indicates that the first operation is to be performed, the first information may be used to determine a first threshold, and the first node may determine whether to send the first S-SSB based on the relationship between the signal measurement result and the first threshold. This will be described later in conjunction with step S420.

[0205] In some embodiments, the frequency at which the first node sends the first S-SSB is related to the first operation, which means that the first node can send the first S-SSB at the frequency at which the first operation is performed.

[0206] In some embodiments, the first information indicates that the first operation to be performed is related to the first frequency, which means that the sending frequency of the first S-SSB is the first frequency, or the sending frequency of the first S-SSB is determined based on the first frequency.

[0207] As an embodiment, when the first information indicates to perform a first operation and the first operation is related to a first frequency, the first node sends the first S-SSB on the first frequency.

[0208] As an embodiment, the first information indicates that the first operation is not performed, and the first node gives up sending the first S-SSB.

[0209] As an embodiment, when the first information indicates that the first operation is not to be performed and the first operation is related to the first frequency, the first node abandons sending the first S-SSB on the first frequency.

[0210] As an embodiment, the first information includes a first frequency, the first frequency is used for the first operation, and the first node sends the first S-SSB on the first frequency.

[0211] As an embodiment, the first frequency is used for the first operation, and the first frequency is used for sideline communication or sideline discovery.

[0212] As an embodiment, the first frequency is used for the first operation, and the first frequency is used for synchronization or selection of a synchronization reference.

[0213] As an embodiment, the first frequency is used for the first operation, and the first frequency is used for sideline communication or sideline discovery and for synchronization or selection of a synchronization reference.

[0214] As an embodiment, the first information includes a first frequency, the first frequency is not used for the first operation, the first node gives up sending the first S-SSB, or the first node gives up sending the first S-SSB on the first frequency.

[0215] In some embodiments, the third node performs reception of a first S-SSB on the first frequency.

[0216] As an embodiment, the third node may perform the first operation based on the reception status of the first S-SSB. For example, when the third node receives the first S-SSB and is the target node, initial beam pairing or side unicast link establishment is performed. For another example, when the third node does not receive the first S-SSB, or the third node is not the target node of the first S-SSB, the relevant initial beam pairing or side unicast link establishment is not performed.

[0217] For ease of understanding, a possible implementation manner in which the first information is used to determine whether to send the first S-SSB is exemplarily described below in conjunction with Figure 8. The method shown in Figure 8 is executed by the first node.

[0218] Referring to FIG8 , in step S810 , it is determined whether the first information determines that the first operation should be performed. The first information may be related to a first frequency. If the first information determines that the first operation should be performed, step S820 is executed; if the first information determines that the first operation should not be performed, step S830 is executed.

[0219] In step S820, a first S-SSB is sent on a first frequency.

[0220] In step S830, sending the first S-SSB is abandoned.

[0221] In some embodiments, whether the first S-SSB is sent is further determined based on a signal measurement result performed by the first node, or based on the first information and the signal measurement result. This will be described in detail later in conjunction with step S420.

[0222] As an embodiment, the first information and the result of the first signal measurement are jointly used to determine the transmission parameters of the first side synchronization signal block. The first information is also used to determine the transmission parameters of the first S-SSB. Exemplarily, the transmission parameters of the first S-SSB may include the time allocation of the first S-SSB, and / or the number of transmissions corresponding to the first S-SSB, and / or the transmission period corresponding to the first S-SSB. Therefore, the transmission parameters of the first S-SSB may be a set of transmission parameters. The set of transmission parameters may include one or more of the above-mentioned transmission parameters.

[0223] In some embodiments, the number of transmissions corresponding to the first S-SSB refers to the number of transmissions determined according to the configuration of the first S-SSB. Exemplarily, the number of transmissions corresponding to the first S-SSB may be the number of first S-SSBs or the number of transmissions of the first S-SSB. Exemplarily, the number of transmissions of the first S-SSB may be determined according to a high-level configuration.

[0224] Exemplarily, the first S-SSB may refer to an S-SSB sent by the first node, or may refer to a group of S-SSBs. When the first S-SSB is an S-SSB group including multiple S-SSBs, each S-SSB in the first S-SSB may be referred to as a sub-side row synchronization signal block.

[0225] As an embodiment, the first S-SSB includes one or more sub-side row synchronization signal blocks.

[0226] In some embodiments, the one or more sub-side row synchronization signal blocks included in the first S-SSB refer to one or more S-SSBs in a transmission cycle. For example, in a transmission cycle, if multiple S-SSBs are transmitted at a certain time interval, the sub-side row synchronization signal block may be one of the S-SSBs or the multiple S-SSBs.

[0227] As an embodiment, the one or more sub-side row synchronization signal blocks included in the first S-SSB are located within the sending period corresponding to the first S-SSB.

[0228] In some embodiments, the number of transmitted first S-SSBs refers to the number of transmissions of the first S-SSB in one transmission cycle. For example, when the first S-SSB transmits one sub-side row synchronization signal block in one cycle, the number of transmissions is 1. For example, when the first S-SSB transmits N (N is greater than 1) sub-side row synchronization signal blocks in one cycle, the number of transmissions is N. When the first operation is initial beam pairing, N sub-side row synchronization signal blocks may correspond to N beam indices.

[0229] As an embodiment, the number of transmissions corresponding to the first S-SSB is the number of the one or more sub-side synchronization signal blocks in the first S-SSB.

[0230] As an embodiment, the number of transmissions corresponding to the first S-SSB is equal to 1.

[0231] As an embodiment, the number of transmissions corresponding to the first S-SSB is greater than 1.

[0232] As an embodiment, the number of transmissions corresponding to the first S-SSB in one cycle can be any one of 1, 2, 4, 8, 16, 32, and 64.

[0233] In some embodiments, the transmission period corresponding to the first S-SSB may follow the design of the NR SL, or may be newly designed according to the execution requirements of the first operation. For example, the transmission period corresponding to the first S-SSB may be redesigned according to the meaning of the number of transmissions. For another example, when the transmission period of the first S-SSB is determined according to the requirements of the initial beam pairing and / or the establishment of the side unicast link, the design of the transmission period of the first S-SSB needs to be convenient for indication by high-layer signaling.

[0234] Exemplarily, the transmission period corresponding to the first SSB may be indicated by a specified time unit, which may be a time slot or a symbol, etc., which is not limited here.

[0235] As an embodiment, the transmission period corresponding to the first S-SSB includes a positive integer number of time slots.

[0236] Exemplarily, the transmission period corresponding to the first S-SSB may be represented by a specified time length. The specified time length may be represented by M time units representing a time period. The time unit may be milliseconds.

[0237] As an embodiment, the sending period corresponding to the first S-SSB includes a positive integer number of milliseconds (ms).

[0238] As an embodiment, the sending period corresponding to the first S-SSB is equal to 160ms.

[0239] Exemplarily, the transmission period corresponding to the first S-SSB may be a specified number of T time units or a specified time length of T. The T may be a fixed value or a variable that changes according to a certain rule.

[0240] As an embodiment, the sending period corresponding to the first S-SSB is a constant.

[0241] As an embodiment, the sending period corresponding to the first S-SSB is variable.

[0242] In some embodiments, the time allocation of the first S-SSB may be determined based on the time-frequency resources used by the first node to transmit the first S-SSB and / or the transmission requirement of the first S-SSB. The time allocation of the first S-SSB may also be determined based on the time offset and the time interval. Exemplarily, when the first S-SSB includes multiple sub-side row synchronization signal blocks, the time allocation of the first S-SSB may be determined based on the number of the multiple sub-side row synchronization signal blocks.

[0243] As an embodiment, the time allocation of the first S-SSB is related to the time offset between the time slot where the first sub-side row synchronization signal block in the first S-SSB is located and the start of the period corresponding to the first S-SSB. The period corresponding to the first S-SSB is the time period during which the first node sends the first S-SSB. In the case where the first S-SSB includes multiple sub-side row synchronization signal blocks, the start time of the period and the configured time offset can be used to determine the sending time of the first sub-side row synchronization signal block.

[0244] As an embodiment, the value of the time offset may be any number between 0 and 1279.

[0245] In one embodiment, the time allocation of the first S-SSB is related to the interval between the time slots in which any two sub-side row synchronization signal blocks in the first S-SSB are located. The interval between any two sub-side row synchronization signal blocks can be determined based on a configured time interval. For example, for two adjacent sub-side row synchronization signal blocks, the interval between the two is a configured time interval.

[0246] As an embodiment, the value of the time interval may be any number from 0 to 639.

[0247] Exemplarily, the time allocation of the first S-SSB may include a variety of information to facilitate determining the sending time of the first S-SSB and the multiple sub-side synchronization signal blocks it contains.

[0248] As an embodiment, the time allocation of the first S-SSB includes the time offset between the time slot where the first sub-side row synchronization signal block in the first S-SSB is located and the start of the period corresponding to the first S-SSB.

[0249] As an embodiment, the time allocation of the first S-SSB includes the interval between the time slots in which any two sub-side synchronization signal blocks in the first S-SSB are located.

[0250] In some embodiments, the multiple transmission parameters of the first S-SSB are interrelated. For example, the transmission period corresponding to the first S-SSB may be related to the number of transmissions corresponding to the first S-SSB. For another example, the time allocation of the first S-SSB may be related to the transmission period and the number of transmissions corresponding to the first S-SSB.

[0251] As an embodiment, the time allocation of the first S-SSB includes the sending period corresponding to the first S-SSB.

[0252] For ease of understanding, the following example illustrates the S-SSB transmission parameters shown in Figure 9. In Figure 9, the transmission period corresponding to the first S-SSB is the S-SSB period, which is 16 radio frames. When 16 radio frames are grouped together, each period starts with the first time slot of the current group of radio frames and ends with the first time slot of the next group of radio frames.

[0253] In the example of Figure 9, there are four S-SSBs in one cycle, and each S-SSB can be called a sub-side row synchronization signal block. As shown in Figure 9, the number of first S-SSBs transmitted is the number of sub-side row synchronization signal blocks, so the number of transmitted S-SSBs is four. The number of first S-SSBs transmitted can also be any parameter among 1, 2, 8, 16, 32, 64, etc.

[0254] Continuing with Figure 9, the time slot where the first sub-side line synchronization signal block is located is determined by the start of the cycle and the offset parameter. The offset parameter is the time offset described above. The time offset can be any number between 0 and 1279.

[0255] The time slots in which other sub-side line synchronization signal blocks are located are determined by the interval parameter between two adjacent sub-side line synchronization signal blocks. This interval parameter is the time interval described above. The interval between any two sub-side line synchronization signal blocks is an integer multiple of the time interval. The time interval can be any number between 0 and 639.

[0256] The time allocation of the first S-SSB is related to the start, offset and interval parameters of the cycle in FIG9 .

[0257] In some embodiments, the first information may directly indicate the transmission parameters of the first S-SSB. That is, the first node may directly determine the transmission parameters of the first S-SSB based on the received first information. For example, if the first information indicates the number of S-SSB(s) transmitted in a period and / or the transmission period of the S-SSB, the first node may transmit the S-SSB(s) according to the instruction of the first information.

[0258] In some embodiments, the transmission parameters of the first S-SSB may also be determined based on a signal measurement result performed by the first node, or based on the first information and the signal measurement result. This will be described later in conjunction with step S420.

[0259] Continuing to refer to FIG. 4 , in step S420 , a first signal measurement is performed.

[0260] The first signal measurement may be a measurement performed by the first node on reference signals from different communication devices and / or service areas. The communication device may be, for example, a synchronization reference node serving as a synchronization reference source. The service area may be, for example, a cell.

[0261] As an embodiment, the first signal measurement includes signal measurement of a synchronization reference node or a cell where the first node is located.

[0262] As an embodiment, the first signal measurement includes signal measurement of a synchronization reference node.

[0263] As an embodiment, the synchronization reference node includes the SyncRefUE.

[0264] As an embodiment, the first signal measurement includes signal measurement of a cell.

[0265] The result of the first signal measurement may be represented by one or more parameters indicating reference signal quality. For example, the result of the first signal measurement may be RSRP, reference signal received quality (RSRQ), or reference signal strength indicator (RSSI), which is not limited here.

[0266] In some embodiments, the result of the first signal measurement is used to determine whether to transmit the first S-SSB. Exemplarily, the relationship between the result of the first signal measurement and a first threshold is used to determine whether to transmit the first S-SSB. For example, whether the result of the first signal measurement is below the first threshold is used to determine whether to transmit the first S-SSB. Exemplarily, the result of the first signal measurement is combined with the first information to determine whether to transmit the first S-SSB.

[0267] As an embodiment, the result of the first signal measurement is lower than the first threshold, and the first S-SSB is sent.

[0268] As an embodiment, if the result of the first signal measurement is equal to or greater than the first threshold, sending the first S-SSB is abandoned.

[0269] As an embodiment, the first threshold is used by the first node to determine whether to perform the first operation.

[0270] The first threshold may be configured or pre-configured, may be indicated by the first information, or may be dynamically adjusted based on actual conditions. For example, the first threshold may be configured by higher-layer signaling of the first node. For example, the first threshold may be determined based on the first information received by the first node.

[0271] In some embodiments, the first information may determine the first threshold value in a variety of ways. For example, the first information may include the first threshold value. For example, the first information may be used by the first node to select the first threshold value from a plurality of candidate threshold values. For example, the first information may include a first threshold offset for determining the first threshold value, so that the first node determines the first threshold value based on the first reference threshold value and the first threshold offset.

[0272] As an implementation, the first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds. Exemplarily, when the plurality of candidate thresholds includes a target threshold, when the first information indicates that a first operation is to be performed or a first frequency is to be used for the first operation, the first threshold is equal to the target threshold; when the first information indicates that the first operation is not to be performed or the first frequency is not to be used for the first operation, the first threshold is an alternative threshold other than the target threshold among the plurality of candidate thresholds.

[0273] As an embodiment, the multiple candidate thresholds are configured by higher layer signaling. For example, the RRC signaling of the first node can configure multiple candidate thresholds.

[0274] Exemplarily, the multiple candidate thresholds may include multiple thresholds for sideline communication or sideline discovery and a first threshold, so that the first node can better perform sideline communication or sideline discovery, initial beam pairing, and sideline unicast link establishment. The first threshold may also be called a target threshold.

[0275] As an embodiment, the multiple candidate thresholds include syncTxThreshIC and a target threshold. For example, the multiple thresholds configured by the RRC signaling of the first node include a first threshold for determining whether to send the first S-SSB.

[0276] As an embodiment, the multiple candidate thresholds include syncTxThreshIC, syncTxThreshOoC and the target threshold, wherein syncTxThreshIC and syncTxThreshOoC may use the relevant configuration parameters for sidelink communication or sidelink discovery, or may be configured with new parameters.

[0277] As an embodiment, the syncTxThreshIC may refer to section 6.3.5 of 3GPP TS38.331.

[0278] As an embodiment, the syncTxThreshOoC may refer to section 6.3.5 of 3GPP TS38.331.

[0279] For ease of understanding, a possible implementation manner in which the first information is used to determine the first threshold is exemplarily described below with reference to Figure 10. The method shown in Figure 10 is also executed by the first node.

[0280] 10 , step S1010 is the same as step S810 and will not be described in detail herein. If the answer to step S1010 is yes, step S1020 is executed; if the answer to step S1010 is no, step S1030 is executed.

[0281] In step S1020, the first threshold is equal to the target threshold.

[0282] In step S1030 , the first threshold is an alternative threshold other than the target threshold among a plurality of alternative thresholds.

[0283] As an implementation, the first threshold may be determined based on a first reference threshold and / or a first threshold offset. For example, when the first information is used to determine whether to perform the first operation, the first threshold is the sum of the first reference threshold and the first threshold offset, and the first threshold offset is not zero; when the first information is used to determine whether to not perform the first operation, the first threshold is the first reference threshold.

[0284] As an embodiment, the first reference threshold is a reference threshold indicated by first information.

[0285] As an embodiment, the first reference threshold is syncTxThreshIC or syncTxThreshOoC.

[0286] As an embodiment, the first threshold offset is configured by higher layer signaling.

[0287] As an embodiment, the first threshold offset is less than 0.

[0288] As an embodiment, the first threshold offset is greater than 0. That is, the first threshold is higher than the first reference threshold. After the result of the first signal measurement performed by the first node is lower than the first threshold, the first S-SSB is transmitted. Taking Figure 3 as an example, the first threshold being greater than the first reference threshold means that boundary line 332 will move inward. In other words, the area between boundary line 332 and boundary line 334 becomes larger, and more user devices meet the conditions for transmitting the first S-SSB.

[0289] As an embodiment, the first threshold offset is a negative integer.

[0290] As an embodiment, the first threshold offset is a positive integer.

[0291] As an embodiment, the unit of the first threshold offset is dB.

[0292] For ease of understanding, another possible implementation manner in which the first information is used to determine the first threshold is exemplarily described below in conjunction with Figure 11. The method shown in Figure 11 is also executed by the first node.

[0293] 11 , step S1110 is the same as step S810 and will not be described in detail herein. If the answer to step S1110 is yes, step S1120 is executed; if the answer to step S1110 is no, step S1130 is executed.

[0294] In step S1120 , the first threshold is the sum of the first reference threshold and the first threshold offset.

[0295] In step S1130 , the first threshold is a first reference threshold.

[0296] In some embodiments, the result of the first signal measurement is used to determine the transmission parameters of the first S-SSB. For example, the first node may measure the RSRP from a synchronization reference node or cell, and the measured RSRP value is used to determine the transmission parameters of the first S-SSB. It should be understood that, in the absence of a conflict, the first information and the result of the first signal measurement may be used together to determine the transmission parameters of the first S-SSB. In other words, at least one of the first information and the result of the first signal measurement is used to determine the transmission parameters of the first S-SSB.

[0297] As an embodiment, the first information and the result of the first signal measurement are used together to determine the transmission parameters of the first sideline synchronization signal block.

[0298] As an embodiment, the transmission parameters of the first S-SSB include the first threshold, and whether the result of the first signal measurement is lower than the first threshold is used to determine whether to send the first S-SSB.

[0299] As an embodiment, the sending parameters of the first S-SSB include one or more parameters described above.

[0300] As an implementation method, the transmission parameter of the first S-SSB is one of multiple sets of alternative parameters, and the result of the first signal measurement is used to determine the transmission parameter of the first S-SSB from the multiple sets of alternative parameters.

[0301] As an embodiment, the multiple sets of candidate parameters are configured by higher layer signaling. For example, RRC signaling of the first node can configure multiple sets of candidate parameters.

[0302] As an embodiment, the first information and the result of the first signal measurement are used together to determine the transmission parameters of the first sidelink synchronization signal block from the multiple sets of alternative parameters.

[0303] As an embodiment, each set of alternative parameters in the multiple sets of alternative parameters includes the period corresponding to the transmission of the side synchronization signal block, the number of transmissions of the side synchronization signal block within a period corresponding to the side synchronization signal block, the time allocation, time offset and time interval of the side synchronization signal block.

[0304] As an embodiment, the sideline synchronization signal block includes a plurality of sideline synchronization signal blocks that can be sent. The first S-SSB is any one of the sideline synchronization signal blocks.

[0305] As an embodiment, the multiple sets of candidate parameters may continue to use relevant configuration parameters for side communication or side discovery, or may configure new parameters, and may also include relevant configuration parameters and new target parameters.

[0306] In some embodiments, the transmission parameters of the first S-SSB are determined based on the results of the first signal measurement and the first threshold.

[0307] In one embodiment, the transmission parameters of the first S-SSB are determined based on whether the result of the first signal measurement is lower than a first threshold. For example, when the result of the first signal measurement is lower than the first threshold, the transmission parameters of the first S-SSB are determined based on first candidate parameters, and at least one of the transmission parameters of the first S-SSB is different from the first candidate parameters. When the result of the first signal measurement is not lower than the first threshold, the transmission parameters of the first S-SSB are the first candidate parameters.

[0308] As an embodiment, the first candidate parameter is any one of the multiple sets of candidate parameters mentioned above.

[0309] As an embodiment, some parameters in the sending parameters of the first S-SSB are the same as the first alternative parameters.

[0310] As an embodiment, the same partial parameters are sending cycles or time allocations.

[0311] As an embodiment, some parameters in the sending parameters of the first S-SSB are determined based on the first alternative parameters and the parameter offset value.

[0312] As an embodiment, the parameter offset value is configured by a higher layer.

[0313] As an embodiment, the parameter offset value is determined according to a result of measuring the first signal.

[0314] As an embodiment, the sending period corresponding to the first S-SSB is determined according to the sending period and period offset value of the first alternative parameter.

[0315] As an embodiment, the number of transmissions corresponding to the first S-SSB is determined according to the number of transmissions of the first alternative parameter.

[0316] As an embodiment, the time allocation of the first S-SSB is determined according to the time allocation of the first alternative parameter.

[0317] For ease of understanding, a possible implementation manner in which the result of the first signal measurement is used to determine the transmission parameters of the first S-SSB is exemplarily described below in conjunction with Figure 12. The method shown in Figure 12 is also performed by the first node.

[0318] 12 , in step S1210 , it is determined whether the result of the first signal measurement is lower than the first threshold value. If the answer to step S1210 is yes, step S1220 is executed; if the answer to step S1210 is no, step S1230 is executed.

[0319] In step S1220, the transmission parameters of the first S-SSB are different from the first candidate parameters.

[0320] In step S1230, the transmission parameter of the first S-SSB is a first reference threshold.

[0321] In some embodiments, transmission parameters of the first S-SSB are determined based on a first signal measurement result and / or first information. As an implementation, the first signal measurement result is used to determine multiple sets of candidate parameters, and the first information is used to select target parameters from the multiple sets of candidate parameters.

[0322] As an implementation, the result of the first signal measurement is used to select a target parameter from a plurality of sets of candidate parameters. The target parameter is used to determine a transmission parameter of the first S-SSB based on the first information.

[0323] Exemplarily, in a case where multiple alternative parameters include a target parameter, when the first information is used to determine whether to perform a first operation, the transmission parameter of the first S-SSB is set to the target parameter; when the first information is used to determine not to perform the first operation, the transmission parameter of the first S-SSB is set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameter.

[0324] For ease of understanding, a possible implementation manner in which the first information is used to determine the transmission parameters of the first S-SSB is exemplarily described below in conjunction with Figure 13. The method shown in Figure 13 is also performed by the first node.

[0325] 13 , step S1310 is the same as step S810 and will not be described in detail herein. If the answer to step S1310 is yes, step S1320 is executed; if the answer to step S1310 is no, step S1330 is executed.

[0326] In step S1320, the transmission parameters of the first S-SSB are set as target parameters.

[0327] In step S1330, the transmission parameters of the first S-SSB are set to a set of alternative parameters other than the target parameters among the multiple sets of alternative parameters.

[0328] As an implementation manner, the first information is used to determine a plurality of sets of candidate parameters, and the result of the first signal measurement is used to select a target parameter from the plurality of sets of candidate parameters.

[0329] As an implementation method, the first information is used to select target parameters from multiple sets of alternative parameters, and the target parameters are used to determine the transmission parameters of the first S-SSB based on the results of the first signal measurement.

[0330] Exemplarily, when multiple alternative parameters include a target parameter, when the result of the first signal measurement is lower than a first threshold, the transmission parameter of the first S-SSB is set to the target parameter; when the result of the first signal measurement is not lower than the first threshold, the transmission parameter of the first S-SSB is set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameter.

[0331] For ease of understanding, another possible implementation manner in which the result of the first signal measurement is used to determine the transmission parameters of the first S-SSB is exemplarily described below in conjunction with Figure 14. The method shown in Figure 14 is also executed by the first node.

[0332] 14 , step S1410 is the same as step S1210 and will not be described in detail herein. If the answer to step S1410 is yes, step S1420 is executed; if the answer to step S1410 is no, step S1430 is executed.

[0333] In step S1420, the transmission parameters of the first S-SSB are set as target parameters.

[0334] In step S1430, the transmission parameters of the first S-SSB are set to a set of alternative parameters other than the target parameters among the multiple sets of alternative parameters.

[0335] As an implementation, the result of the first signal measurement is used to determine a first candidate parameter. The first candidate parameter is used to determine a transmission parameter of the first S-SSB according to the first information.

[0336] As an embodiment, the first candidate parameter is selected from a plurality of sets of candidate parameters according to the first signal measurement result.

[0337] As an implementation method, the sending parameters of the first S-SSB can be determined based on the first alternative parameters.

[0338] Exemplarily, when the first information is used to determine whether to perform the first operation, the transmission parameters of the first S-SSB are determined according to first candidate parameters, and at least one of the transmission parameters of the first S-SSB is different from the first candidate parameters; when the first information is used to determine not to perform the first operation, the transmission parameters of the first S-SSB are the first candidate parameters. The first candidate parameters are as described above and are not repeated here.

[0339] For ease of understanding, another possible implementation manner in which the first information is used to determine the transmission parameters of the first S-SSB is exemplarily described below in conjunction with Figure 15. The method shown in Figure 15 is also executed by the first node.

[0340] 15 , step S1510 is the same as step S810 and will not be described in detail herein. If the answer to step S1510 is yes, step S1520 is executed; if the answer to step S1510 is no, step S1530 is executed.

[0341] In step S1520, the transmission parameters of the first S-SSB are different from the first candidate parameters.

[0342] In step S1530, the transmission parameter of the first S-SSB is the first candidate parameter.

[0343] The foregoing describes various possible implementations of the method shown in FIG4 in conjunction with FIG8 and FIG10 to FIG15. Before or after executing step S410 or step S420 shown in FIG4, the first node may further receive second information from the second node or higher-layer signaling. The second information is used to determine whether the first node transmits a second S-SSB, or the second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, where the sideline communication or the sideline discovery is related to the second S-SSB.

[0344] In some embodiments, the second frequency is the same as the first frequency.

[0345] In some embodiments, the second frequency is different from the first frequency.

[0346] In some embodiments, the second information further includes a second threshold value, where the second threshold value is a threshold value other than the target threshold value among a plurality of candidate threshold values.

[0347] In some embodiments, the second threshold is the first reference threshold.

[0348] In some embodiments, the transmission parameters of the second S-SSB are a set of parameters other than the target parameters among multiple sets of alternative parameters.

[0349] In some embodiments, the transmission parameter of the second S-SSB is a first alternative parameter.

[0350] In some embodiments, the sending of the second S-SSB may refer to 5.8.5.2 of 3GPP TS38.331.

[0351] In conjunction with Figures 4 to 15, it can be seen that the first information and the results of the first signal measurement can both be used to determine whether to send the first S-SSB, and can also be used to determine the transmission parameters of the first S-SSB. Since step S420 is optional, in the absence of a conflict, the first node can perform multiple combinations of the first information and the results of the first signal measurement to determine whether to send the first S-SSB and the transmission parameters of the first S-SSB. By introducing the newly introduced conditions for determining whether to send the S-SSB, resources can be effectively utilized to perform initial beam pairing based on SSB. The various combinations include the following multiple embodiments.

[0352] In embodiment 1, the first node can determine whether to send the first S-SSB and the sending parameters only through the first information.

[0353] In Example 2, the first node may determine whether to transmit the first S-SSB using the first information, and then determine the transmission parameters of the first S-SSB based on the result of the first signal measurement. For example, if the first information indicates TRUE, the first node transmits the first S-SSB; then, the result of the first signal measurement performed by the first node is used to determine the number of first S-SSBs transmitted in a period and / or the transmission period of the first S-SSB.

[0354] In Example 3, the first node may determine a first threshold using the first information and then determine whether to transmit the first S-SSB based on the relationship between the first signal measurement result and the first threshold. For example, the first node's first signal measurement result is valid as a basis for determining whether to transmit the first S-SSB; however, whether the first node performs initial beam pairing based on the first S-SSB is used to determine the first threshold. When the first signal measurement result is less than the first threshold, the first S-SSB is transmitted.

[0355] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 15 . The device embodiment of the present application is described in detail below in conjunction with Figures 16 to 20 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0356] FIG16 shows a first node for wireless communication provided by an embodiment of the present application. As shown in FIG16 , the first node 1600 includes a first receiver 1610 .

[0357] The first receiver 1610 can be used to receive first information, and the first information is used to determine whether to perform a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, and the first information is used to determine whether to send a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0358] As an embodiment, the first information indicates whether the first operation is performed; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0359] As an embodiment, the first information indicates that the first operation is performed, and the first operation is related to the first frequency; or, the first information includes the first frequency, and the first frequency is used for the first operation; the first node 1600 also includes a first transmitter, which can be used to send the first side synchronization signal block on the first frequency.

[0360] As an embodiment, the first information indicates that the first operation is not performed; or, the first information includes a first frequency, and the first frequency is not used for the first operation; the first node 1600 also includes a second transmitter, which can be used to abandon sending the first side synchronization signal block.

[0361] As an embodiment, the first node 1600 also includes a first processor, which can be used to perform a first signal measurement; wherein, whether the result of the first signal measurement is lower than a first threshold is used to determine whether to send the first side synchronization signal block, and the first information is used to determine the first threshold.

[0362] As an embodiment, the first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds.

[0363] As an embodiment, the multiple alternative thresholds include a target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is equal to the target threshold; when the first information is used to determine not to perform the first operation, the first threshold is an alternative threshold among the multiple alternative thresholds other than the target threshold.

[0364] As an embodiment, when the first information is used to determine whether to perform the first operation, the first threshold is the sum of the first reference threshold and the first threshold offset, and the first threshold offset is not 0; when the first information is used to determine not to perform the first operation, the first threshold is the first reference threshold.

[0365] As an embodiment, the sending parameters of the first side synchronization signal block include at least one of the time allocation of the first side synchronization signal block, the number of transmissions corresponding to the first side synchronization signal block, and the sending period corresponding to the first side synchronization signal block.

[0366] As an embodiment, the first node 1600 further includes a second processor, which can be used to perform a first signal measurement; wherein the result of the first signal measurement is used to determine the transmission parameters of the first side synchronization signal block.

[0367] As an embodiment, whether the result of the first signal measurement is lower than a first threshold is used to determine the sending parameters of the first side synchronization signal block; when the result of the first signal measurement is lower than the first threshold, the sending parameters of the first side synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0368] As an embodiment, the sending parameter of the first side synchronization signal block is one of multiple sets of alternative parameters, and at least one of the first information and the result of the first signal measurement is used to determine the sending parameter of the first side synchronization signal block from the multiple sets of alternative parameters.

[0369] As an embodiment, the multiple sets of alternative parameters include target parameters; when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are set to the target parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0370] As an embodiment, the multiple sets of alternative parameters include target parameters; when the result of the first signal measurement is lower than a first threshold, the sending parameters of the first side synchronization signal block are set to the target parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters in the multiple sets of alternative parameters except the target parameters.

[0371] As an embodiment, when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are determined according to the first alternative parameters, and at least one of the sending parameters of the first side synchronization signal block is different from the first alternative parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are the first alternative parameters.

[0372] As an embodiment, the first receiver is also used to receive second information, and the second information is used to determine whether to send a second sideline synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

[0373] As an embodiment, the first receiver 1610 may be a transceiver 1930. The first node 1600 may further include a processor 1910 and a memory 1920, as specifically shown in FIG19 .

[0374] FIG17 is a diagram of a second node for wireless communication provided by an embodiment of the present application. As shown in FIG17 , the second node 1700 includes a third transmitter 1710 .

[0375] The third transmitter 1710 can be used to send first information to the first node, and the first information is used to determine whether the first node performs a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, and the first information is used to determine whether the first node sends a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0376] As an embodiment, the first information indicates whether the first operation is performed; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0377] As an embodiment, the third transmitter is also used to send second information to the first node, and the second information is used to determine whether the first node sends a second side synchronization signal block; wherein the second information includes a second frequency, and the second frequency is used for the first node to perform side communication or side discovery, and the side communication or the side discovery is related to the second side synchronization signal block.

[0378] As an embodiment, the third transmitter 1710 may be a transceiver 1930. The second node 1700 may further include a processor 1910 and a memory 1920, as specifically shown in FIG19 .

[0379] FIG18 is a diagram of a third node for wireless communication provided by an embodiment of the present application. As shown in FIG18 , the third node 1800 includes a second receiver 1810 .

[0380] The second receiver 1810 can be used to perform reception of a first sidelink synchronization signal block on a first frequency; wherein the first sidelink synchronization signal block is related to a first operation, the first operation including at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, the first information is used to determine whether the first node performs the first operation, the first information is also used to determine whether the first node sends the first sidelink synchronization signal block, and / or, the first information is also used to determine the sending parameters of the first sidelink synchronization signal block.

[0381] As an embodiment, the first information indicates whether the first operation is performed; or, the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

[0382] As an embodiment, the received first sideline synchronization signal block is used to perform the first operation.

[0383] As an embodiment, the second receiver 1810 may be a transceiver 1930. The third node 1800 may further include a processor 1910 and a memory 1920, as specifically shown in FIG19 .

[0384] Figure 19 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 19 indicate that the unit or module is optional. Device 1900 may be used to implement the method described in the above method embodiment. Device 1900 may be a chip, user equipment, or network device.

[0385] The device 1900 may include one or more processors 1910. The processor 1910 may support the device 1900 to implement the method described in the above method embodiment. The processor 1910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0386] The apparatus 1900 may further include one or more memories 1920. The memories 1920 store programs that can be executed by the processor 1910, causing the processor 1910 to perform the methods described in the above method embodiments. The memories 1920 may be independent of the processor 1910 or integrated into the processor 1910.

[0387] The apparatus 1900 may further include a transceiver 1930. The processor 1910 may communicate with other devices or chips via the transceiver 1930. For example, the processor 1910 may transmit and receive data with other devices or chips via the transceiver 1930.

[0388] Figure 20 is a schematic diagram of the hardware modules of a communication device provided in an embodiment of the present application. Specifically, Figure 20 shows a block diagram of a first communication device 2050 and a second communication device 2010 communicating with each other in an access network.

[0389] The first communication device 2050 includes a controller / processor 2059, a memory 2060, a data source 2067, a transmit processor 2068, a receive processor 2056, a multi-antenna transmit processor 2057, a multi-antenna receive processor 2058, a transmitter / receiver 2054 and an antenna 2052.

[0390] The second communication device 2010 includes a controller / processor 2075, a memory 2076, a data source 2077, a receive processor 2070, a transmit processor 2016, a multi-antenna receive processor 2072, a multi-antenna transmit processor 2071, a transmitter / receiver 2018 and an antenna 2020.

[0391] During transmission from the second communications device 2010 to the first communications device 2050, at the second communications device 2010, upper layer data packets from the core network or from a data source 2077 are provided to a controller / processor 2075. The core network and data source 2077 represent all protocol layers above the L2 layer. The controller / processor 2075 implements L2 layer functionality. During transmission from the second communications device 2010 to the first communications device 2050, the controller / processor 2075 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications device 2050 based on various priority metrics. The controller / processor 2075 is also responsible for retransmission of lost packets and signaling to the first communications device 2050. The transmit processor 2016 and the multi-antenna transmit processor 2071 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 2016 implements coding and interleaving to facilitate forward error correction at the second communication device 2010, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying, quadrature phase shift keying, M-phase shift keying, and M-quadrature amplitude modulation). The multi-antenna transmit processor 2071 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 2016 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then uses an inverse fast Fourier transform to generate a physical channel carrying the time-domain multicarrier symbol stream. The multi-antenna transmit processor 2071 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 2018 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 2071 into a radio frequency stream, and then provides it to a different antenna 2020 .

[0392] During transmission from the second communications device 2010 to the first communications device 2050, each receiver 2054 at the first communications device 2050 receives a signal via its corresponding antenna 2052. Each receiver 2054 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream, which is provided to the receive processor 2056. The receive processor 2056 and the multi-antenna receive processor 2058 implement various L1 layer signal processing functions. The multi-antenna receive processor 2058 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 2054. The receive processor 2056 uses a fast Fourier transform to convert the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain. In the frequency domain, the receive processor 2056 demultiplexes the physical layer data signal and reference signal, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 2058 to recover any spatial streams destined for the first communications device 2050. The symbols on each spatial stream are demodulated and recovered in the receive processor 2056, and soft decisions are generated. The receive processor 2056 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communications device 2010 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 2059. The controller / processor 2059 implements the functionality of the L2 layer. The controller / processor 2059 may be associated with a memory 2060 that stores program code and data. The memory 2060 may be referred to as a computer-readable medium. During transmission from the second communications device 2010 to the first communications device 2050, the controller / processor 2059 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the second communications device 2010. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0393] During transmission from the first communications device 2050 to the second communications device 2010, upper layer data packets are provided to the controller / processor 2059 at the first communications device 2050 using a data source 2067. The data source 2067 represents all protocol layers above the L2 layer. Similar to the transmission functionality at the second communications device 2010 described in the transmission from the second communications device 2010 to the first communications device 2050, the controller / processor 2059 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, implementing L2 layer functions for both the user plane and the control plane. The controller / processor 2059 is also responsible for retransmission of lost packets and signaling to the second communications device 2010. The transmit processor 2068 performs modulation mapping and channel coding, while the multi-antenna transmit processor 2057 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 2068 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 2057, the stream is provided to different antennas 2052 via the transmitter 2054. Each transmitter 2054 first converts the baseband symbol stream provided by the multi-antenna transmit processor 2057 into a RF symbol stream before providing it to the antenna 2052.

[0394] In the transmission from the first communication device 2050 to the second communication device 2010, the functionality at the second communication device 2010 is similar to the reception functionality at the first communication device 2050 described for the transmission from the second communication device 2010 to the first communication device 2050. Each receiver 2018 receives a radio frequency signal via its corresponding antenna 2020, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to a multi-antenna receive processor 2072 and a receive processor 2070. The receive processor 2070 and the multi-antenna receive processor 2072 collectively implement the L1 layer functionality. The controller / processor 2075 implements the L2 layer functionality. The controller / processor 2075 may be associated with a memory 2076 that stores program codes and data. The memory 2076 may be referred to as a computer-readable medium. During transmission from the first communications device 2050 to the second communications device 2010, the controller / processor 2075 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the first communications device 2050. The upper layer data packets from the controller / processor 2075 can be provided to the core network or all protocol layers above the L2 layer, and various control signals can also be provided to the core network or L3 for L3 processing.

[0395] As an embodiment, the first communication device 2050 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 2050 apparatus at least: receives first information, and the first information is used to determine whether to perform a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment and sidelink beam management, the first information is used to determine whether to send a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0396] As an embodiment, the first communication device 2050 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, and the action includes: receiving first information, and the first information is used to determine whether to perform a first operation; wherein the first operation includes at least one of initial beam pairing, sidelink unicast link establishment, and sidelink beam management, and the first information is used to determine whether to send a first sidelink synchronization signal block related to the first operation, and / or, the first information is used to determine the sending parameters of the first sidelink synchronization signal block.

[0397] As an embodiment, the first communication device 2050 corresponds to the first node or the third node in this application.

[0398] As an embodiment, the second communication device 2010 corresponds to the second node in this application.

[0399] As an embodiment, the first communication device 2050 is a user equipment, which can serve as a relay node.

[0400] As an embodiment, the first communication device 2050 is a user equipment supporting V2X, which can serve as a relay node.

[0401] As an embodiment, the first communication device 2050 is a user equipment supporting D2D, and the user equipment can serve as a relay node.

[0402] As an embodiment, the first communication device 2050 is a network control relay NCR.

[0403] As an embodiment, the first communication device 2050 is a relay wireless repeater.

[0404] As an embodiment, the first communication device 2050 is a relay.

[0405] As an embodiment, the second communication device 2010 is a base station.

[0406] As an embodiment, the first communication device 2050 corresponds to the first node in this application, the antenna 2052, the receiver 2054, the multi-antenna receiving processor 2058, the receiving processor 2056, and the controller / processor 2059 are used to receive the first information in this application.

[0407] As an embodiment, the antenna 2020, the transmitter 2018, the multi-antenna transmit processor 2071, the transmit processor 2016, and the controller / processor 2075 are used to send the first information in this application.

[0408] As an embodiment, the first communication device 2050 corresponds to the third node in the present application, the antenna 2052, the receiver 2054, the multi-antenna receiving processor 2058, the receiving processor 2056, and the controller / processor 2059 are used to perform the reception of the first side synchronization signal block in the present application.

[0409] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0410] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0411] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0412] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0413] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0414] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0415] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0416] In the embodiments of the present application, "pre-defined" or "pre-configured" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a user device and a network device). The present application does not limit the specific implementation method. For example, pre-defined may refer to information defined in a protocol.

[0417] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0418] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0419] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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 the present application.

[0420] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0421] The units described as separate components may or may not be physically separate, and 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 these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0422] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0423] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0424] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method in a first node for wireless communication, characterized in that include: receiving first information, wherein the first information is used to determine whether to perform a first operation; The first operation includes at least one of initial beam pairing, side-by-side unicast link establishment and side-by-side beam management; the first information is used to determine whether to send a first side-by-side synchronization signal block related to the first operation, and / or the first information is used to determine the sending parameters of the first side-by-side synchronization signal block.

2. The method according to claim 1, characterized in that The first information indicates whether the first operation is performed; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

3. The method according to claim 1 or 2, characterized in that: include: The first information indicates to perform the first operation, and the first operation is related to a first frequency; Alternatively, the first information includes the first frequency, and the first frequency is used for the first operation; The first sideline synchronization signal block is transmitted on the first frequency.

4. The method according to claim 1 or 2, characterized in that: include: The first information indicates that the first operation is not to be performed; Alternatively, the first information includes a first frequency, and the first frequency is not used for the first operation; Abandon sending the first sideline synchronization signal block.

5. The method according to any one of claims 1 to 4, characterized in that include: performing a first signal measurement; Whether the result of the first signal measurement is lower than a first threshold is used to determine whether to send the first sideline synchronization signal block, and the first information is used to determine the first threshold.

6. The method according to claim 5, characterized in that The first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds.

7. The method according to claim 6, characterized in that The multiple alternative thresholds include a target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is equal to the target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is an alternative threshold among the multiple alternative thresholds other than the target threshold.

8. The method according to claim 5, characterized in that When the first information is used to determine to perform the first operation, the first threshold is the sum of a first reference threshold and a first threshold offset, and the first threshold offset is not 0; When the first information is used to determine not to perform the first operation, the first threshold is the first reference threshold.

9. The method according to any one of claims 1 to 8, characterized in that The transmission parameters of the first sideline synchronization signal block include at least one of the time allocation of the first sideline synchronization signal block, the number of transmissions corresponding to the first sideline synchronization signal block, and the transmission period corresponding to the first sideline synchronization signal block.

10. The method according to any one of claims 1 to 4 and 9, characterized in that: include: performing a first signal measurement; The result of the first signal measurement is used to determine the transmission parameters of the first side synchronization signal block.

11. The method according to claim 10, characterized in that Whether the result of the first signal measurement is lower than a first threshold is used to determine the sending parameters of the first sideline synchronization signal block; when the result of the first signal measurement is lower than the first threshold, the sending parameters of the first sideline synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first sideline synchronization signal block is different from the first alternative parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first sideline synchronization signal block are the first alternative parameters.

12. The method according to claim 10, characterized in that The transmission parameter of the first sideline synchronization signal block is one of multiple sets of candidate parameters, and at least one of the first information and the result of the first signal measurement is used to determine the transmission parameter of the first sideline synchronization signal block from the multiple sets of candidate parameters.

13. The method according to claim 12, characterized in that The multiple sets of alternative parameters include target parameters; when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are set to the target parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameters.

14. The method according to claim 12, characterized in that The multiple sets of alternative parameters include target parameters; when the result of the first signal measurement is lower than a first threshold, the sending parameters of the first side synchronization signal block are set to the target parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameters.

15. The method according to any one of claims 1 to 9, characterized in that When the first information is used to determine whether to perform the first operation, the sending parameters of the first sideline synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first sideline synchronization signal block is different from the first alternative parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first sideline synchronization signal block are the first alternative parameters.

16. The method according to any one of claims 1 to 15, characterized in that include: receiving second information, wherein the second information is used to determine whether to send a second sideline synchronization signal block; The second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

17. A method in a second node for wireless communication, characterized in that: include: Sending first information to a first node, where the first information is used to determine whether the first node performs a first operation; The first operation includes at least one of initial beam pairing, side-by-side unicast link establishment and side-by-side beam management; the first information is used to determine whether the first node sends a first side-by-side synchronization signal block related to the first operation, and / or the first information is used to determine the sending parameters of the first side-by-side synchronization signal block.

18. The method according to claim 17, characterized in that The first information indicates whether the first node performs the first operation; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

19. The method according to claim 17 or 18, characterized in that include: Sending second information to the first node, where the second information is used to determine whether the first node sends a second sideline synchronization signal block; The second information includes a second frequency, and the second frequency is used by the first node for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

20. A method in a third node for wireless communication, characterized in that: include: performing reception of a first sideline synchronization signal block at a first frequency; The first sidewalk synchronization signal block is related to a first operation, and the first operation includes at least one of initial beam pairing, sidewalk unicast link establishment and sidewalk beam management. The first information is used to determine whether the first node performs the first operation. The first information is also used to determine whether the first node sends the first sidewalk synchronization signal block, and / or the first information is also used to determine the sending parameters of the first sidewalk synchronization signal block.

21. The method according to claim 20, characterized in that The first information indicates whether the first node performs the first operation; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

22. The method according to claim 20 or 21, characterized in that include: The received first sideline synchronization signal block is used to perform the first operation.

23. A first node for wireless communication, characterized in that: include: A first receiver, configured to receive first information, wherein the first information is used to determine whether to perform a first operation; The first operation includes at least one of initial beam pairing, side-by-side unicast link establishment and side-by-side beam management; the first information is used to determine whether to send a first side-by-side synchronization signal block related to the first operation, and / or the first information is used to determine the sending parameters of the first side-by-side synchronization signal block.

24. The first node according to claim 23, characterized in that The first information indicates whether the first operation is performed; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

25. The first node according to claim 23 or 24, characterized in that: The first information indicates to perform the first operation, and the first operation is related to a first frequency; or, the first information includes the first frequency, and the first frequency is used for the first operation; The first node also includes a first transmitter for transmitting the first sidelink synchronization signal block on the first frequency.

26. The first node according to claim 23 or 24, characterized in that: The first information indicates that the first operation is not performed; or, the first information includes a first frequency, and the first frequency is not used for the first operation; The first node also includes a second transmitter, configured to abandon sending the first sideline synchronization signal block.

27. The first node according to any one of claims 23-26, characterized in that: Also includes: A first processor, configured to perform a first signal measurement; Whether the result of the first signal measurement is lower than a first threshold is used to determine whether to send the first sideline synchronization signal block, and the first information is used to determine the first threshold.

28. The first node according to claim 27, characterized in that The first threshold is one of a plurality of candidate thresholds, and the first information is used to determine the first threshold from the plurality of candidate thresholds.

29. The first node according to claim 28, characterized in that The multiple alternative thresholds include a target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is equal to the target threshold; when the first information is used to determine whether to perform the first operation, the first threshold is an alternative threshold among the multiple alternative thresholds other than the target threshold.

30. The first node according to claim 27, characterized in that When the first information is used to determine to perform the first operation, the first threshold is the sum of a first reference threshold and a first threshold offset, and the first threshold offset is not 0; When the first information is used to determine not to perform the first operation, the first threshold is the first reference threshold.

31. The first node according to any one of claims 23 to 30, characterized in that: The sending parameters of the first sideline synchronization signal block include at least one of the time allocation of the first sideline synchronization signal block, the number of transmissions corresponding to the first sideline synchronization signal block, and the sending period corresponding to the first sideline synchronization signal block.

32. The first node according to any one of claims 23-26 and 31, characterized in that: Also includes: a second processor, configured to perform a first signal measurement; The result of the first signal measurement is used to determine the transmission parameters of the first side synchronization signal block.

33. The first node according to claim 32, characterized in that Whether the result of the first signal measurement is lower than a first threshold is used to determine the sending parameters of the first sideline synchronization signal block; when the result of the first signal measurement is lower than the first threshold, the sending parameters of the first sideline synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first sideline synchronization signal block is different from the first alternative parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first sideline synchronization signal block are the first alternative parameters.

34. The first node according to claim 32, characterized in that The transmission parameter of the first sideline synchronization signal block is one of multiple sets of candidate parameters, and at least one of the first information and the result of the first signal measurement is used to determine the transmission parameter of the first sideline synchronization signal block from the multiple sets of candidate parameters.

35. The first node according to claim 34, characterized in that The multiple sets of alternative parameters include target parameters; when the first information is used to determine whether to perform the first operation, the sending parameters of the first side synchronization signal block are set to the target parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameters.

36. The first node according to claim 34, characterized in that The multiple sets of alternative parameters include target parameters; when the result of the first signal measurement is lower than a first threshold, the sending parameters of the first side synchronization signal block are set to the target parameters; when the result of the first signal measurement is not lower than the first threshold, the sending parameters of the first side synchronization signal block are set to a set of alternative parameters among the multiple sets of alternative parameters except the target parameters.

37. The first node according to any one of claims 23-31, characterized in that: When the first information is used to determine whether to perform the first operation, the sending parameters of the first sideline synchronization signal block are determined according to first alternative parameters, and at least one of the sending parameters of the first sideline synchronization signal block is different from the first alternative parameters; when the first information is used to determine not to perform the first operation, the sending parameters of the first sideline synchronization signal block are the first alternative parameters.

38. The first node according to any one of claims 23-37, characterized in that: The first receiver is further used to receive second information, where the second information is used to determine whether to send a second sideline synchronization signal block; The second information includes a second frequency, and the second frequency is used for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

39. A second node for wireless communication, characterized in that: include: A third transmitter, configured to send first information to the first node, where the first information is used to determine whether the first node performs a first operation; The first operation includes at least one of initial beam pairing, side-by-side unicast link establishment and side-by-side beam management; the first information is used to determine whether the first node sends a first side-by-side synchronization signal block related to the first operation, and / or the first information is used to determine the sending parameters of the first side-by-side synchronization signal block.

40. The second node according to claim 39, characterized in that: The first information indicates whether the first node performs the first operation; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

41. The second node according to claim 39 or 40, characterized in that: The third transmitter is further used to send second information to the first node, where the second information is used to determine whether the first node sends a second sideline synchronization signal block; The second information includes a second frequency, and the second frequency is used by the first node for sideline communication or sideline discovery, and the sideline communication or the sideline discovery is related to the second sideline synchronization signal block.

42. A third node for wireless communication, characterized in that: include: A second receiver for performing reception of a first sideline synchronization signal block at a first frequency; The first sideline synchronization signal block is related to a first operation, and the first operation includes initial beam pairing, sideline unicast link Establishment and side beam management, at least one of the three, the first information is used to determine whether the first node performs the first operation, the first information is also used to determine whether the first node sends the first side synchronization signal block, and / or, the first information is also used to determine the transmission parameters of the first side synchronization signal block.

43. The third node according to claim 42, characterized in that: The first information indicates whether the first node performs the first operation; or the first information includes a first frequency, the first frequency is used for the first operation, or the first frequency is not used for the first operation.

44. The third node according to claim 42 or 43, characterized in that: include: The received first sideline synchronization signal block is used to perform the first operation.

45. A node used for wireless communication, characterized in that: It includes a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal so that the node executes the method as described in any one of claims 1-16 or 17-19 or 20-22.

46. ​​A device, characterized in that It comprises a processor, which is used to call a program from a memory so that the device executes the method as described in any one of claims 1-16 or 17-19 or 20-22.

47. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes the method as described in any one of claims 1-16 or 17-19 or 20-22.

48. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method as claimed in any one of claims 1-16, 17-19 or 20-22.

49. A computer program product, characterized in that It comprises a program which causes a computer to execute the method as claimed in any one of claims 1-16 or 17-19 or 20-22.

50. A computer program, characterized in that The computer program causes a computer to execute the method of any one of claims 1-16 or 17-19 or 20-22.

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