Lateral communication method and terminal

Abstract

The invention relates to a sidewalk communication method and a terminal. The sidewalk communication method comprises the following steps: a first terminal sends first information on a sidewalk link by adopting a first sending mode, wherein the first information indicates beam related information. According to the embodiment of the invention, the beam-related information is indicated through the information communicated with other terminals, beam communication can be used in a sidelink, and the transmission speed is improved.

Description

Sideline communication method and terminal Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a sideline communication method and terminal. Background Art

[0002] Unlike traditional cellular systems where communication data is received or sent via a base station, sidelinks allow terminals to communicate directly with each other, resulting in higher spectrum efficiency and lower transmission latency.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a sidelink communication method and terminal, which can use beam communication in a sidelink to increase the signaling transmission speed.

[0005] The present invention provides a sideline communication method, including:

[0006] The first terminal sends first information in a first sending manner on a sidelink, where the first information indicates beam-related information.

[0007] The present invention provides a sideline communication method, including:

[0008] The second terminal receives first information in a first receiving manner on a sidelink, where the first information indicates beam-related information.

[0009] An embodiment of the present application provides a first terminal, including:

[0010] A sending unit is used to send first information on a side link using a first sending method, where the first information indicates beam-related information.

[0011] An embodiment of the present application provides a second terminal, including:

[0012] A receiving unit is configured to receive first information on a side link using a first receiving mode, where the first information indicates beam-related information.

[0013] An embodiment of the present application provides a terminal device, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the above-mentioned sideline communication method.

[0014] The embodiment of the present application provides a chip for implementing the above-mentioned sideline communication method. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the above-mentioned sideline communication method.

[0015] An embodiment of the present application provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a device, the device executes the above-mentioned sideline communication method.

[0016] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned sideline communication method.

[0017] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned sideline communication method.

[0018] In the embodiment of the present application, beam-related information is indicated by information communicated with other terminals, so that beam communication can be used in the side link to improve the transmission speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 1 and 2 are schematic diagrams of transmission modes.

[0020] FIG3 is a schematic diagram of a rough pairing process (P1) of downlink transmit beams and receive beams.

[0021] FIG4 is a schematic flowchart of a sideline communication method according to an embodiment of the present application.

[0022] Figures 5 and 6 are schematic diagrams of the discovery process.

[0023] FIG7 a is a schematic diagram of an omnidirectional mode.

[0024] FIG7 b is a schematic diagram of a beam scanning method.

[0025] FIG7 c is a schematic diagram of a multi-beam approach.

[0026] FIG8 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0027] FIG9 is a schematic flowchart of a sideline communication method according to another embodiment of the present application.

[0028] FIG10 is a schematic block diagram of a first terminal according to an embodiment of the present application.

[0029] FIG11 is a schematic block diagram of a first terminal according to another embodiment of the present application.

[0030] FIG12 is a schematic block diagram of a second terminal according to an embodiment of the present application.

[0031] FIG13 is a schematic block diagram of a second terminal according to another embodiment of the present application.

[0032] FIG14 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0033] FIG15 is a schematic block diagram of a chip according to an embodiment of the present application.

[0034] FIG16 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0037] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0038] In one embodiment, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0039] In one embodiment, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0040] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0041] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0042] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0043] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0044] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0045] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0046] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0047] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0048] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0049] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0050] In the description of 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 being indicated, configuration and being configured, etc.

[0051] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0052] 1. LTE D2D / V2X

[0053] Device-to-device communication is a sidelink transmission technology based on D2D. Sidelink (SL) differs from traditional cellular systems, where communication data is received or sent via a base station. IoV systems utilize direct end-to-end communication, resulting in higher spectrum efficiency and lower transmission latency. The 3rd Generation Partnership Project (3GPP) defines two transmission modes: Mode A and Mode B, as shown in Figures 1 and 2.

[0054] Mode A: The terminal's transmission resources are allocated by the base station, and the terminal sends data on the sidelink based on the resources allocated by the base station. The base station can allocate resources for a single transmission or for semi-static transmission.

[0055] Mode B: The vehicle terminal selects a resource in the resource pool for data transmission.

[0056] In 3GPP, D2D can be divided into different stages.

[0057] 1. Proximity-based Service (ProSe): Device-to-device communication in Rel-12 / 13 is studied for ProSe scenarios, primarily targeting public safety services. ProSe enables discontinuous transmission / reception of data on the UE sidelink by configuring the time domain location of resource pools, for example, discontinuous resource pools, thereby saving power.

[0058] 2. V2X: In Rel-14 / 15, the Internet of Vehicles (IoV) system focused on vehicle-to-vehicle communication scenarios, primarily targeting relatively high-speed vehicle-to-vehicle and vehicle-to-pedestrian communications. In V2X, since the vehicle system has a continuous power supply, power efficiency is less of a concern, while data transmission latency is the primary concern. Therefore, the system design requires continuous transmission and reception of terminal devices.

[0059] 3. Wearable devices, such as Further Enhancements to LTE Device-to-Device (FeD2D): In Rel-14, this scenario involves research on wearable devices accessing the network via mobile phones, primarily targeting low-speed and low-power access scenarios. In the pre-research phase of FeD2D, 3GPP concluded that a base station can configure the remote terminal's discontinuous reception (DRX) parameters through a relay terminal.

[0060] NR V2X

[0061] Building on LTE V2X, NR V2X extends beyond broadcast scenarios to include unicast and multicast scenarios, exploring V2X applications in these scenarios. Similar to LTE V2X's Mode A and Mode B, NR V2X has two resource authorization modes: Mode 1 and Mode 2. Furthermore, users may operate in a hybrid mode, acquiring resources using both Mode 1 and Mode 2.

[0062] Unlike LTE V2X, in addition to the feedback-free, UE-initiated Hybrid Automatic Repeat reQuest (HARQ) retransmissions, NR V2X includes feedback-based HARQ retransmissions, which are not limited to unicast communications but also include multicast communications.

[0063] Similar to LTE V2X, in NR V2X, power efficiency is less of a concern because the vehicle's onboard system has a continuous power supply, while data transmission latency is the primary concern. Therefore, the system design requires the terminal device to continuously transmit and receive data.

[0064] 3. Basic process of downlink beam management on the NR air interface (Uu)

[0065] In downlink transmission, beam management addresses the following fundamental issues: If both the network and the terminal use analog beams, good communication quality requires that the transmit and receive beams be aligned (i.e., paired) to form a beam pair. Therefore, determining one or more beam pairs that ensure optimal link channel quality is a fundamental issue in beam management.

[0066] This issue involves the downlink transmit beam of the network device and the downlink receive beam of the terminal:

[0067] The network side needs to know which transmit beam is better for terminal transmission, which depends on the terminal's measurement and reporting of the downlink transmit beam.

[0068] The terminal needs to know which downlink transmission beam or beams of the network device are better for its transmission. At the same time, for a specific downlink transmission beam, the millimeter wave terminal also needs to consider which receiving beam to use for better reception performance, which also depends on the terminal's measurement.

[0069] The process of pairing transmit and receive beams in downlink transmission can be roughly divided into three main processes, which are denoted as P1, P2, and P3 respectively:

[0070] P1: Coarse pairing of downlink transmit and receive beams.

[0071] P2: Fine adjustment of the downlink transmit beam on the network side.

[0072] P3: Fine adjustment of the downlink receive beam on the terminal side.

[0073] Figure 3 shows a schematic diagram of the coarse pairing process (P1) for downlink transmit and receive beams. During initial access, coarse pairing is achieved through a four-step random access process. After initial access, a beam pairing with relatively good link quality is established between the network and the UE to support subsequent data transmission. At this point, if both the transmit and receive beams are narrow, alignment takes a long time, resulting in significant system latency. Therefore, to quickly complete coarse pairing between beams, the corresponding transmit and receive beams may be relatively wide. The resulting beam pairing achieves good performance, but is not optimal.

[0074] Based on the coarse pairing of P1, fine adjustments can be made to the transmit and receive beams (corresponding to the P2 and P3 processes, respectively), using finer beams to further improve transmission performance.

[0075] After coarse synchronization is achieved between downlink transmit beam 2 and downlink receive beam A through the P1 process, the P2 process is as follows:

[0076] P21: To fine-tune transmit beam 2, the network sends three narrower beams: 2-1, 2-2, and 2-3.

[0077] P22: The terminal uses receive beam A to receive signals transmitted on transmit beams 2-1, 2-2, and 2-3, respectively, and performs layer 1 (L1) reference signal received power (RSRP) measurement.

[0078] P23: Based on the measurement results, the terminal reports to the network which narrow beam or beams are better for transmission.

[0079] After coarse synchronization is achieved between downlink transmit beam 2 and downlink receive beam A through the P1 process, the P3 process is as follows:

[0080] P31: To fine-tune the receive beam, the network sends measurement signals multiple times on beam 2.

[0081] P32: The terminal uses three narrower beams, A-1, A-2, and A-3, to receive the signal transmitted on beam 2 and perform measurements.

[0082] P33: Based on the measurement results, the terminal decides which narrow beam is better to use for transmit beam 2. In this process, the terminal does not need to report to the network which narrow beam it has selected to receive transmit beam 2.

[0083] 4. Discovery Process

[0084] 1. Model A discovery (“I am here”):

[0085] This mode defines two roles for UEs participating in discovery.

[0086] Notification UE: The UE announces certain information, which can be used by neighboring UEs with discovery rights.

[0087] Monitoring UE: A monitoring UE that is advertising certain information of interest in the vicinity of the UE.

[0088] In this mode, an advertising UE broadcasts discovery messages at predefined discovery intervals, and monitoring UEs that are interested in these messages read and process the discovery messages.

[0089] This mode is equivalent to "I am here" because the announcing UE (or called an announcing UE) will broadcast information about itself.

[0090] 2. Model B discovery (“Who’s there?” / “Are you there?”):

[0091] This mode defines two roles for UEs participating in discovery.

[0092] Discovering UEs: The UE sends a request containing certain information about what it is interested in discovering.

[0093] Discovered UE: The UE that receives the request message can respond with some information related to the discoverer's request.

[0094] This mode is equivalent to "Who's there / Are you there?" because the discovering UE sends information about other discovered UEs. This information can be a ProSe application identifier corresponding to a group, and members of the group can respond.

[0095] 3. Based on the Direct Communication Request (DCR) message scheme:

[0096] In this solution, UEs do not use discovery messages to discover target UEs. Instead, they utilize the existing DCR message. The source UE broadcasts a DCR message containing information about the target UE. The relay UE receives the message and forwards it to the target UE, completing the discovery process.

[0097] Currently, there is no beam-based transmission for the sidelink (SL). The sidelink communication method provided in the embodiment of the present application can be based on beam transmission in the sidelink.

[0098] FIG4 is a schematic flow chart of a sideline communication method 400 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG1 or FIG2 , but is not limited thereto. The method includes at least part of the following contents.

[0099] S410. The first terminal sends first information in a first sending manner on a sidelink, where the first information indicates beam-related information.

[0100] In the embodiments of the present application, the first terminal that sends the first information can be referred to as the sending terminal, and the second terminal that receives the first information can be referred to as the receiving terminal. For example, UE1 sends the first signaling, and UE2 sends the second signaling after receiving the first signaling, and UE1 receives the second signaling. If the first terminal is UE1 and the second terminal is UE2, the first information can be the first signaling or included in the first signaling. If the first terminal is UE2 and the second terminal is UE1, the first information can be the second signaling or included in the second signaling. For another example, UE1 sends the third signaling after receiving the second signaling, and UE2 sends the fourth signaling after receiving the third signaling, and UE1 receives the fourth signaling. If the first terminal is UE1 and the second terminal is UE2, the first information can be the third signaling or included in the third signaling. If the first terminal is UE2 and the second terminal is UE1, the first information can be the fourth signaling or included in the fourth signaling. The above signaling is only an example of the first information and is not a limitation. In the specific communication process, the quantity, content, etc. of the first information can be determined according to actual needs.

[0101] In some examples, during the unicast communication establishment process, the first terminal may transmit first information on the sidelink using a first transmission mode. For example, the terminal receiving the first information may be the second terminal. The first information may explicitly or implicitly indicate beam-related information. For example, the first signaling may include beam-related information. In another example, the beam-related information may be implicitly indicated by time domain resources and / or frequency domain resources in the first signaling.

[0102] In the discovery process of establishing unicast communication, different terminals may need to exchange multiple signaling messages to establish unicast communication.

[0103] For example, as shown in Figure 5, the discovery process of Mode A is as follows: S501. UE1 sends a discovery message to UE2 (an example of the first signaling). S502. UE2 sends a Direct Communication Request (DCR) message to UE1 (an example of the second signaling). S503. UE1 sends a Security Mode Control (SMC) message to UE2 (an example of the third signaling). S504. UE2 sends an SMC ACK message to UE1 (an example of the fourth signaling). S505. UE1 sends a Direct Communication Accept (DCA) message to UE2. S506. UE2 and UE1 perform unicast transmission.

[0104] For another example, as shown in Figure 6, the discovery process of Mode B is as follows: S601. UE1 sends a Discovery Solicitation message to UE2 (an example of first signaling). S602. UE2 sends a Discovery Response message to UE1 (an example of second signaling). S603. UE1 sends a DCR message to UE2 (an example of third signaling). S604. UE2 sends an SMC message to UE1. S605. UE1 sends an SMC ACK message to UE2 (an example of fourth signaling). S606. UE2 sends a DCA message to UE1. S607. UE2 and UE1 perform unicast transmission.

[0105] In an embodiment of the present application, the terminal indicates beam-related information by sending information on the side link, and can use beam communication on the side link. It can use the beam to increase the information transmission speed, support a larger transmission volume, and thus be suitable for high-frequency side communication.

[0106] In one embodiment, the beam-related information includes information about the transmit beam of the first terminal.

[0107] For example, the first information is the first signaling sent by UE1, and the beam-related information indicated by the first signaling may include information about the transmit beam of UE1. UE2, which receives the second signaling, may perform at least one of the following actions based on the information about the transmit beam of UE1 indicated by the first signaling: determining UE2's receive beam, determining UE2's transmit beam to UE1, determining UE1's transmit beam to UE2, measuring UE1's transmit beam, etc.

[0108] For another example, the first information is the second signaling sent by UE2 after receiving the first signaling. The beam-related information indicated by the second signaling may include information about the transmit beam of UE2. UE1 that receives the second signaling may perform at least one of the following actions based on the information about the transmit beam of UE2 indicated by the second signaling: determining UE1's receive beam, determining UE2's transmit beam to UE1, determining UE1's transmit beam to UE2, measuring UE2's transmit beam, etc.

[0109] In one embodiment, the information of the transmit beam of the first terminal includes at least one of the following: identification information of the transmit beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmit beam of the first terminal. In an embodiment of the present application, the corresponding relationship may also be referred to as a mapping relationship. For example, if the transmit beam of the first terminal includes beam B1, the first information may indicate at least one of the following: identification (ID) information of beam B1, a time slot or symbol corresponding to beam B1, an RB, a carrier or a frequency band corresponding to beam B1, etc.

[0110] In one embodiment, the time domain resources and / or frequency domain resources corresponding to the transmit beam of the first terminal include time domain resources and / or frequency domain resources corresponding to the identification information of the transmit beam of the first terminal. For example, the time slot or symbol corresponding to beam B1 may include the time slot or symbol corresponding to the ID of beam B1. For another example, the RB, carrier, or frequency band corresponding to beam B1 may include the RB, carrier, or frequency band corresponding to the ID of beam B1.

[0111] In one embodiment, the identification information of the transmission beam of the first terminal is specific to the first terminal, specific to the cell, or uniformly configured for the entire network. For example, the identification information of the transmission beam dedicated to the first terminal is B1. The first terminal can send the first information on beam B1. For another example, the identification information of the transmission beam dedicated to the cell is B1 and B2. The first terminal can send the first information on beams B1 and B2. For another example, the identification information of the transmission beam uniformly configured for the entire network is B1, B2, and B3. The first terminal can send the first information on beams B1, B2, and B3.

[0112] In one embodiment, the correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network. For example, the protocol specifies or the network configures that beam B1 and time slot n have a correspondence, beam B2 and symbol i have a correspondence, or beam B3 and RBx have a correspondence. The first terminal can send the first information on beam B1 at time slot n. The first terminal can send the first information on beam B2 at symbol i. The first terminal can send the first information on beam B2 at RBx. For another example, the first terminal sends the first information at time slot n, and time slot n and beam B1 have a correspondence, which means that the first terminal selects beam B1 as the transmit beam of the second terminal or the receive beam of the first terminal.

[0113] In one embodiment, the beam-related information includes a measurement configuration of the transmit beam of the first terminal. By indicating the measurement configuration of the transmit beam of the first terminal through the first information, a receiving terminal, such as a second terminal, can be instructed to measure at least one transmit beam of the first terminal.

[0114] In one embodiment, the measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

[0115] In one implementation, the measurement variable is a network configuration, a protocol provision, or a configuration of the first terminal.

[0116] In one embodiment, the measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel, and measurement information. For example, the measurement signal includes a Channel-State Information Reference Signal (CSI-RS). For another example, the measurement channel includes at least one of a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), and a Physical Sidelink Feedback Channel (PSFCH). For another example, the measurement information includes at least one of Sidelink Control Information (SCI) and MAC CE information.

[0117] For example, the measurement target configuration indicated by the first information includes that the transmitting beams of the first terminal to be measured are beam B1 and beam B2, and the second terminal that receives the first information can measure beam B1 and beam B2. For another example, the measurement quantity configuration indicated by the first information includes that the reference signal receiving power (RSRP) needs to be measured, and the second terminal that receives the first information can measure the RSRP of the beam that sends the first information. For another example, the measurement threshold configuration indicated by the first information is the power threshold corresponding to RSRP, and the second terminal that receives the first information can compare whether the RSRP of the measured beam is greater than the power threshold. For another example, the measurement report configuration indicated by the first information includes the beam identifier, measurement results, selection results, etc. that need to be reported.

[0118] In one embodiment, the beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal. The beam measurement report may also be referred to as a beam report or a measurement report. The beam measurement report may include a measurement result and / or selection result obtained by the first terminal measuring at least one transmit beam of the second terminal. For example, if UE1 needs to measure multiple transmit beams of UE2, after the measurement, UE1 may send some or all of the beam measurement results to UE2, and UE1 may also send a beam selection result to UE2, which may include some or all of the transmit beams of UE2 selected by UE1.

[0119] In the embodiment of the present application, the threshold conditions may include multiple ones. For example, the measurement quantities L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, and L3-RSRQ may each have a corresponding threshold condition.

[0120] In one embodiment, the beam measurement report includes at least one of the following:

[0121] a measurement result of at least one transmit beam of the second terminal;

[0122] identification information of a beam related to a measurement result of at least one transmit beam of the second terminal;

[0123] Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

[0124] In one embodiment, the beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following:

[0125] A beam with the best signal quality;

[0126] K beams with the best signal quality (e.g., the top K beams in terms of signal quality), where K is greater than 1;

[0127] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0128] The M beams with the best signal quality (eg, the top M beams in signal quality ranking) whose signal quality meets the threshold condition, where M is greater than 1.

[0129] In one embodiment, the beam measurement report is carried by at least one of the following: a physical sidelink feedback channel (PSFCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a media access control element (MAC CE). In an embodiment of the present application, the beam measurement report and other contents of the first information can also be sent separately. For example, the other contents of the first information are carried by the SCI, and the beam measurement report is carried by the MAC CE.

[0130] In one embodiment, the beam-related information includes at least one of the following:

[0131] a beam for transmitting the first information that corresponds to at least one transmitting beam of the second terminal;

[0132] The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmitting beam of the second terminal.

[0133] In an embodiment of the present application, the first information may implicitly indicate beam-related information through some corresponding relationships. For example, UE1 indicates the beam B1 for sending the first information through the first information, and the beam B1 corresponds to the transmission beam B3 of UE2. If UE2 receives the first information, it can be obtained from the corresponding relationship that the transmission beam of UE2 is beam B3. For another example, UE1 indicates the time slot, symbol, RB, carrier or frequency band for sending the first information through the first information, and the time slot, symbol, RB, carrier or frequency band for sending the first information corresponds to the transmission beam B4 of UE2. If UE2 receives the first information, it can be obtained from the corresponding relationship that the transmission beam of UE2 is beam B4.

[0134] In one embodiment, the method further includes: the first terminal measuring at least one transmit beam of the monitored second terminal. For example, if UE1 indicates, as indicated by UE2 or the network, that UE2's transmit beams to be measured are beams B4 and B5, and the first terminal monitors beams B4, B5, and B6 of UE2, then only beams B4 and B5 of UE2 may be measured.

[0135] In one embodiment, the beam that the first terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the first terminal, and characteristics of the first terminal.

[0136] In one embodiment, the measurement quantity of the beam measurement includes at least one of the following:

[0137] Layer 1 (L1) - Reference Signal Receiving Power (RSRP), L1 - Signal to Interference plus Noise Ratio (SINR), Layer 3 (L3) - RSRP, L3 - SINR, L1 - Reference Signal Receiving Quality (RSRQ), L3 - RSRQ.

[0138] In an embodiment of the present application, a terminal on a side link may send or receive first information in a beamforming manner or an omnidirectional manner. For example, the beamforming manner may be referred to as a unidirectional manner. The sending manner of the transmitting terminal may be a unidirectional sending manner or an omnidirectional sending manner, and the receiving beam manner of the receiving terminal may be a unidirectional receiving beam or an omnidirectional receiving beam. The sending manner of the transmitting terminal for the first information including different beam-related information may be the same or different. The receiving manner of the receiving terminal for the first information including different beam-related information may be the same or different. The sending manner and / or receiving manner of certain terminals in a specific side link communication process may be determined by pre-configuration, network configuration, terminal configuration or protocol agreement. For example, high-frequency side link communication may be configured to adopt a unidirectional sending manner and / or a unidirectional receiving manner, and low-frequency side link communication may be configured to adopt an omnidirectional sending manner and / or an omnidirectional receiving manner.

[0139] The following diagrams illustrate systems without analog beamforming (omnidirectional) and with analog beamforming (unidirectional). Figure 7a shows an omnidirectional system without analog beamforming. Figures 7b and 7c show unidirectional systems with analog beamforming.

[0140] In Figure 7a, the network side / sending UE side uses a wide beam to cover the entire cell / all directions, and UE1-UE5 can receive the signal at any time.

[0141] In Figures 7b and 7c, the network side / transmitting UE side uses narrower beams (e.g., beams 1-4 in Figures 7b and 7c), and different beams are used at different or the same time to cover different areas in the cell. For example, in Figure 7b, at time 1, beam 1 covers the area where UE1 is located; at time 2, beam 2 covers the area where UE2 is located; at time 3, beam 3 covers the area where UE3 and UE4 are located; and at time 4, beam 4 covers the area where UE5 is located. As another example, in Figure 7c, multiple beams are transmitted simultaneously, and at the same time, beam 1 covers the area where UE1 is located; beam 2 covers the area where UE2 is located; beam 3 covers the area where UE3 and UE4 are located; and beam 4 covers the area where UE5 is located. In Figures 7b and 7c, because the network uses narrower beams, the transmission energy can be more concentrated, thus covering a longer distance. At the same time, because the beams are narrow, each beam can only cover a portion of the cell.

[0142] In one embodiment, the first terminal sends the first information on the sidelink using a first sending mode, including at least one of the following:

[0143] The first terminal repeatedly sends the first information on each beam of the first terminal using a beam scanning method on the sidelink, see Figure 7b;

[0144] The first terminal uses multiple beams on the sidelink to simultaneously send the first information on each beam of the first terminal, see Figure 7c;

[0145] The first terminal transmits the first information on each beam of the first terminal using a beam on a sidelink.

[0146] In the embodiments of the present application, beam scanning can be understood as a unidirectional method. UE1 employs beam scanning to scan its beam at regular intervals, such as 1ms. If an available transmit beam is found, the first information is transmitted on that beam. If multiple available transmit beams are found, the first information is repeatedly transmitted on each of the scanned available transmit beams.

[0147] In one embodiment, the repeated transmission is periodic repeated transmission or repeated transmission based on available resources. In the embodiment of the present application, the period of repeatedly transmitting the first information can be determined based on one of the following: network configuration, pre-configuration, protocol provisions and sidelink (SL) discontinuous reception (DRX).

[0148] In one embodiment, the period and / or interval of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provisions, and SL DRX. For example, at least one of the first signaling, second signaling, third signaling, and fourth signaling of the sideline communication utilizes SL DRX. The period and / or interval of the beam scanning mode can be determined based on relevant parameters of SL DRX.

[0149] In one embodiment, the first terminal uses one beam on the sidelink to send the first information on each beam of the first terminal, including at least one of the following:

[0150] The first terminal transmits the first information through a target transmit beam on a sidelink;

[0151] The first terminal transmits the first information through a default transmit beam on a sidelink.

[0152] In an embodiment of the present application, if the first terminal has determined a target transmission beam for the second terminal, the first information may be sent to the second terminal using the target transmission beam. For example, UE1 may select one of the beams in the multiple beam measurement reports received from UE2 as the target transmission beam for UE1 to transmit to UE2. The target transmission beam selected by UE1 may include at least one of the following: a beam with the best signal quality among the measurement results included in the beam measurement report; or a beam that meets a threshold condition among the measurement results included in the beam measurement report.

[0153] In one embodiment, the first transmission mode is a unidirectional transmission mode. For example, the unidirectional transmission mode may include at least one of the above-mentioned beam scanning transmission mode, a multi-beam transmission mode, and a single-beam transmission mode.

[0154] In one embodiment, the conditions for sending the first information in the first sending mode, such as the unidirectional sending mode, include at least one of the following:

[0155] The first terminal has determined a target transmit beam;

[0156] Sending the first information by unicast;

[0157] The protocol stipulates / network configuration adopts a first sending mode to send the first information;

[0158] An upper layer instructs to use a first sending mode to send the first information;

[0159] The upper layer indicates that the sending mode corresponding to the service, layer 2 identifier (L2ID) or configuration file associated with the first information is the first sending mode.

[0160] For example, if UE1 has determined a target transmission beam for UE2 through previous interaction, the first information may be sent to UE2 via the target transmission beam.

[0161] For another example, if UE1 can unicast the first information, the first information can be sent to UE2 through the default transmission beam.

[0162] For another example, if the protocol stipulates / the network configures UE1 to send the first information in a unidirectional manner, UE1 can send the first information in a beam scanning manner, using multiple beams simultaneously, or using one beam.

[0163] For another example, if the upper layer of UE1, such as the Non-Access Stratum (NAS) or application layer, instructs UE1 to send the first information in a unidirectional manner, UE1 can send the first information in a beam scanning manner, using multiple beams simultaneously, or using one beam.

[0164] For another example, if the upper layer of UE1 indicates that the service, L2ID, or configuration file associated with the first information corresponds to a unidirectional transmission mode, UE1 may transmit the first information using a beam scanning mode, using multiple beams simultaneously, or using a single beam. The configuration file may be a transmission configuration file (Tx profile) or a file with another name.

[0165] In one embodiment, the first transmission mode is an omnidirectional transmission mode. In an embodiment of the present application, the first terminal uses an omnidirectional transmission mode to send the first information, which can be understood as the first terminal using an omnidirectional antenna to send the first information, see Figure 7a. The analog beamforming technology can change the phase on the corresponding channel of each antenna through a phase shifter, so that a group of antennas can form beams in different directions, thereby achieving cell coverage through beam sweeping, that is, using beams corresponding to different directions at different times to cover different areas in the cell. For example, for the 2GHz-6GHz frequency band, the network device can choose whether to use analog beamforming technology, and the terminal can still use a traditional omnidirectional antenna without analog beamforming. For the millimeter wave frequency band, both the network device and the terminal can choose to use analog beamforming technology.

[0166] In one embodiment, the conditions for sending the first information in the first sending mode, such as the omnidirectional sending mode, include at least one of the following:

[0167] The first terminal fails to determine a target transmit beam;

[0168] Sending the first information by multicast or broadcast;

[0169] The protocol stipulates / network configuration adopts a first sending mode to send the first information;

[0170] An upper layer instructs to use a first sending mode to send the first information;

[0171] The upper layer indicates that the sending mode corresponding to the service, L2ID or configuration file associated with the first information is the first sending mode.

[0172] For example, if UE1 has not yet determined the target transmission beam for UE2, the first information can be sent through an omnidirectional antenna. For another example, if UE1 can unicast the first information, the first information can be sent through an omnidirectional antenna. For another example, if the protocol stipulates / the network configures UE1 to send the first information in an omnidirectional transmission mode, UE1 can send the first information through an omnidirectional antenna. For another example, if the upper layer of UE1 instructs UE1 to send the first information in an omnidirectional transmission mode, UE1 can send the first information through an omnidirectional antenna. For another example, if the upper layer of UE1 indicates that the transmission mode corresponding to the service, L2ID or configuration file associated with the first information is an omnidirectional transmission mode, UE1 can send the first information through an omnidirectional antenna.

[0173] In one embodiment, the first information is carried by at least one of side control information (SCI), ProSe Communication 5 Signaling (PC5-S), PC5-Radio Resource Control (RRC), and Media Access Control Element (MAC CE).

[0174] In one embodiment, the PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a direct communication request (DCR) message, a security mode control (SMC) message, an SMC-acknowledgement (ACK) message, and a direct communication acceptance (DCA) message.

[0175] For example, referring to Figures 5 and 6 , if the first information is the first signaling or is included in the first signaling, the first information may be carried by a discovery message in Mode A of the discovery process; the first information may also be carried by a discovery request message in Mode B of the discovery process. The discovery request message may also be considered a type of discovery message.

[0176] For another example, referring to FIG5 and FIG6, if the first information is the second signaling or is in the second signaling, the first information may be carried by the DCR in mode A of the discovery process; the first information may also be carried by the discovery response message in mode B of the discovery process.

[0177] For another example, referring to FIG5 and FIG6, if the first information is the third signaling or is in the third signaling, the first information may be carried by the SMC message in mode A of the discovery process; the first information may also be carried by the DCR message in mode B of the discovery process.

[0178] For another example, referring to FIG5 and FIG6, if the first information is the fourth signaling or is in the fourth signaling, the first information may be carried by the SMC-ACK message in mode A of the discovery process; the first information may also be carried by the SMC message in mode B of the discovery process.

[0179] For another example, the first information may also be carried by a DCR message in a DCR message solution.

[0180] Figure 8 is a schematic flow chart of a sideline communication method 800 according to an embodiment of the present application. This method may optionally be applied to the systems shown in Figures 1 or 2, but is not limited thereto. The method includes at least some of the following contents. The contents of this method that are identical to those in the embodiment of the sideline communication method executed by the first terminal have the same meaning. Please refer to the relevant description of the above embodiment and will not be repeated here.

[0181] S810: The second terminal receives, on a sidelink, first information using a first reception mode, where the first information indicates beam-related information. For example, referring to Figures 5 and 6 , the first information received by UE2 may be the first signaling or included in the first signaling, or the third signaling or included in the third signaling. The first information received by UE1 may be the second signaling or included in the second signaling, or the fourth signaling or included in the fourth signaling.

[0182] In one embodiment, the beam-related information includes information about a transmitting beam of the first terminal.

[0183] In one embodiment, the information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

[0184] In one embodiment, the time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal include time domain resources and / or frequency domain resources corresponding to the identification information of the transmission beam of the first terminal.

[0185] In one embodiment, the identification information of the transmission beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

[0186] In one embodiment, the correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by a protocol or configured by a network.

[0187] In one embodiment, the beam-related information includes a measurement configuration of the transmit beam of the first terminal.

[0188] In one embodiment, the measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

[0189] In one embodiment, the measurement quantity of the beam measurement includes at least one of the following:

[0190] L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

[0191] In one implementation, the measurement variable is a network configuration, a protocol provision, or a configuration of the first terminal.

[0192] In one embodiment, the measurement target of beam measurement includes at least one of a measurement signal, a measurement channel, and measurement information. For example, the measurement signal includes a CSI-RS. For another example, the measurement channel includes at least one of a PSCCH, a PSSCH, and a PSFCH. For another example, the measurement information includes at least one of sidelink control information (SCI) and MAC CE information.

[0193] In one embodiment, the method further includes: the second terminal measures at least one transmit beam of the monitored first terminal. For example, UE1 sends a first signaling. After UE2 receives the first signaling, if the first signaling includes a measurement configuration of UE1's transmit beam, UE2 can measure at least one transmit beam of UE1 based on the measurement configuration. For another example, UE1 sends a first signaling. After UE2 receives the first signaling, it sends a second signaling. After UE1 receives the second signaling, if the second signaling includes a measurement configuration of UE2's transmit beam, UE1 can measure at least one transmit beam of UE2 based on the measurement configuration.

[0194] In one embodiment, measuring at least one transmit beam of the first terminal is performed in at least one of the following situations:

[0195] The first information is sent by the first terminal using a beam scanning manner;

[0196] The first information is sent on at least one transmit beam of the first terminal;

[0197] The first information indicates that measurement is to be performed on at least one transmit beam of the first terminal;

[0198] The protocol stipulates that at least one transmit beam of the first terminal is measured;

[0199] The network instructs the first terminal to measure at least one transmit beam.

[0200] For example, if the first terminal uses a beam scanning method to transmit the first information through one or more transmit beams, the second terminal can measure each beam that is monitored to transmit the first information. For another example, a certain first information indicates that the receiving terminal needs to measure at least one transmit beam of the transmitting terminal. The transmit beam to be measured can be the beam that transmits the first information or a beam other than the beam that transmits the first signaling. For another example, the protocol stipulates or the network instructs that the monitored beam be measured or the transmit beam indicated by the received first information be measured.

[0201] In one embodiment, the beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

[0202] In one embodiment, the beam measurement report includes at least one of the following:

[0203] a measurement result of at least one transmit beam of the second terminal;

[0204] identification information of a beam related to a measurement result of at least one transmit beam of the second terminal;

[0205] Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

[0206] In one embodiment, the beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following:

[0207] A beam with the best signal quality;

[0208] K beams with the best signal quality, where K is greater than 1;

[0209] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0210] The M beams with the best signal quality that meet the threshold condition, where M is greater than 1.

[0211] In one embodiment, the beam measurement report is carried through at least one of the following: PSFCH, PSCCH, PSSCH, and MAC CE.

[0212] In one embodiment, the beam-related information includes at least one of the following:

[0213] a beam for transmitting the first information that corresponds to at least one transmitting beam of the second terminal;

[0214] The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmitting beam of the second terminal.

[0215] In one embodiment, the second terminal receiving the first information in the sidelink using the first receiving mode includes at least one of the following:

[0216] The second terminal monitors each beam in a beam scanning manner on the sidelink to receive the first information on one or more receiving beams;

[0217] The second terminal monitors one beam or multiple beams simultaneously on the sidelink to receive the first information on one or more receive beams.

[0218] For example, the second terminal may monitor the beam of the second terminal at a predetermined time interval, such as 1 ms, using a beam scanning method. If the second terminal monitors the first information on a beam, the beam may be a receive beam. Using the beam scanning method, the first information may be received on one or more receive beams.

[0219] For another example, the second terminal has n beams and can monitor m beams simultaneously, where m is less than or equal to n. In this case, the second terminal may monitor the first information on m or less receiving beams.

[0220] In one embodiment, the one or more receiving beams are determined based on at least one of the following: the implementation of the second terminal, the network configuration, the default beam, the corresponding relationship with the transmitting beam of the second terminal, the corresponding relationship with the transmitting beam of the first terminal, the measurement result, and the receiving beam being used by the second terminal. For example, the implementation of the second terminal may include the capabilities of the second terminal. For another example, if the second terminal is using a receiving beam to receive other information, the receiving beam may be changed to receive the first information. For another example, when the second terminal acts as a receiving terminal, the default beam may be used as the default receiving beam to receive the first information. For another example, if the receiving beam B6 of the second terminal corresponds to the transmitting beam B1 of the first terminal, and the second terminal can receive the information sent by the transmitting beam B1 of the first terminal through beams B5 and B6, then the beam B6 of the second terminal may be used as the receiving beam for the second terminal. For example, if the second terminal can receive the information sent by the first terminal's transmitting beam B1 through beams B5 and B6, but the signal strength received from B6 is stronger, the second terminal's beam B6 can be used as the receiving beam for the second terminal.

[0221] In one embodiment, the second terminal monitors one beam or multiple beams simultaneously on the sidelink to receive the first information on one or more receive beams, including at least one of the following:

[0222] The second terminal monitors a target receiving beam of the first terminal on a sidelink to receive the first information;

[0223] The second terminal monitors multiple beams simultaneously on the sidelink to receive the first information on one or more target reception beams of the second terminal.

[0224] For example, if the second terminal has determined a target receiving beam for the first terminal, it may monitor only the target receiving beam and receive the first information on the target receiving beam.

[0225] For another example, if the second terminal has determined multiple target receiving beams for the first terminal, it can monitor the multiple beams simultaneously and receive the first information on one or more target receiving beams among the multiple beams, thereby improving the reception success rate.

[0226] In one embodiment, the target receiving beam of the second terminal is determined based on at least one of the following: a beam used to receive the first information, a received signal strength on the beam used to receive the first information, a beam corresponding to at least one transmitting beam of the first terminal to the second terminal, a beam corresponding to the target transmitting beam of the second terminal to the first terminal, and a beam corresponding to the time domain resources and / or frequency domain resources of the first information.

[0227] For example, the beam receiving the first information is selected as the target receiving beam of the second terminal. For another example, based on the received signal strength on multiple receiving beams used to receive the first information, it can be determined which receiving beam receives a stronger signal, and the receiving beam with the stronger signal can be used as the target receiving beam of the second terminal. For another example, the corresponding beam of the transmitting beam of the second terminal to the first terminal is selected as the target receiving beam of the second terminal. For another example, the corresponding beam of the transmitting beam of the first terminal to the second terminal is selected as the target receiving beam of the second terminal. For another example, the corresponding beam of the time domain resources and / or frequency domain resources of the first signaling and / or the third signaling is selected as the target receiving beam of the second terminal.

[0228] In one embodiment, the first receiving mode is a unidirectional receiving mode.

[0229] In one embodiment, the condition for receiving the first information in the first receiving mode includes at least one of the following:

[0230] The second terminal has determined a target receiving beam;

[0231] Receiving the first information by unicast;

[0232] The protocol stipulates / network configuration adopts a first receiving mode to receive the first information;

[0233] The upper layer instructs to use the first receiving mode to receive the first information;

[0234] The upper layer indicates that the receiving mode corresponding to the service, L2ID or configuration file associated with the first information is the first receiving mode.

[0235] The following uses the second terminal as UE1 and the first terminal as UE2 as an example to illustrate the above conditions for receiving the first information.

[0236] For example, if UE1 has determined the target receiving beam for UE2 through previous interaction, the first information such as the third signaling sent by UE2 can be received through the target receiving beam.

[0237] For another example, if UE1 can receive the first information by unicast, it can receive the first information from UE2 through the default receiving beam.

[0238] For another example, if the protocol stipulates / the network configures UE1 to receive the first information in a unidirectional receiving manner, UE1 may receive the first information in a beam scanning manner, using multiple beams simultaneously, or using one beam.

[0239] For another example, if the upper layer of UE1 instructs UE1 to receive the first information in a unidirectional reception manner, UE1 may receive the first information in a beam scanning manner, using multiple beams simultaneously, or using one beam.

[0240] For another example, if the upper layer of UE1 indicates that the reception mode corresponding to the service, L2ID, or profile associated with the first information is a unidirectional reception mode, UE1 may receive the first information using a beam scanning mode, using multiple beams simultaneously, or using a single beam. The profile may be a transmit profile (Tx profile) or a file with another name.

[0241] In one implementation, the first receiving mode is an omnidirectional receiving mode.

[0242] In one embodiment, the condition for receiving the first information in the first receiving mode includes at least one of the following:

[0243] The second terminal fails to determine the target receiving beam;

[0244] Receiving the first information by multicasting or broadcasting;

[0245] The protocol stipulates / network configuration adopts a first receiving mode to receive the first information;

[0246] The upper layer instructs to use the first receiving mode to receive the first information;

[0247] The upper layer indicates that the receiving mode corresponding to the service, L2ID or configuration file associated with the first information is the first receiving mode.

[0248] The following uses the second terminal as UE1 and the first terminal as UE2 as an example to illustrate the above conditions for receiving the first information.

[0249] For example, if UE1 has not yet determined the target receiving beam for UE2, it can receive the first information through an omnidirectional antenna. For another example, if UE1 can receive the first information through unicast, it can receive the first information through an omnidirectional antenna. For another example, if the protocol stipulates / the network configures UE1 to receive the first information in an omnidirectional receiving manner, UE1 can receive the first information through an omnidirectional antenna. For another example, if the upper layer of UE1 instructs UE1 to receive the first information in an omnidirectional receiving manner, UE1 can receive the first information through an omnidirectional antenna. For another example, if the upper layer of UE1 indicates that the reception mode corresponding to the service, L2ID or profile associated with the first information is an omnidirectional reception mode, UE1 can receive the first information through an omnidirectional antenna.

[0250] In one embodiment, the period of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provision, and SL DRX.

[0251] In one embodiment, the receiving terminal matches at least one of the period, configuration, and pattern of the beam scanning mode of the transmitting terminal.

[0252] In one embodiment, the beam that the second terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the second terminal, and characteristics of the second terminal.

[0253] In one embodiment, the method further comprises:

[0254] The second terminal determines a target transmit beam based on the first information.

[0255] In one embodiment, the second terminal determines the target transmit beam based on at least one of the following conditions:

[0256] a correspondence between a beam for transmitting the first information and at least one transmitting beam of the second terminal;

[0257] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal;

[0258] One or more beam measurement reports included in the first information.

[0259] The following takes the second terminal as UE1 and the first terminal as UE2 as an example to illustrate the conditions for UE1 to determine the target transmission beam for UE2.

[0260] For example, if UE1 receives a second signaling after sending a first signaling, UE1 can determine the target transmit beam for UE2 to be beam B1 based on the correspondence between beam B4 of the second signaling and beam B1 of UE1. For another example, if UE1 receives a second signaling after sending a first signaling, UE1 can determine the target transmit beam for UE2 to be beam B2 based on the correspondence between symbol i of the second signaling and beam B2 of the first signaling. For another example, if UE1 receives a second signaling after sending a first signaling, and the second signaling includes only one beam measurement report, and the transmit beam in the beam measurement report is B3, then UE1's transmit beam for UE2 is B3.

[0261] In one embodiment, the target transmission beam of the second terminal to the first terminal is selected from beams in a plurality of beam measurement reports, where the plurality of beam measurement reports are in the first information.

[0262] In one embodiment, the target transmission beam selected by the second terminal includes at least one of the following: a beam with the best signal quality in the measurement results; and a beam that meets a threshold condition in the measurement results.

[0263] In one embodiment, the method further includes: the second terminal determining, based on the first information, at least one transmit beam from the first terminal to the second terminal. After the second terminal determines the at least one transmit beam from the first terminal to the second terminal, the second terminal may report the at least one transmit beam from the first terminal to the second terminal to the first terminal via a beam measurement report. The first terminal may assist in determining a target transmit beam for the second terminal based on the at least one transmit beam provided by the second terminal.

[0264] In one embodiment, the second terminal determines the at least one transmit beam of the first terminal to the second terminal based on at least one of the following conditions:

[0265] a correspondence between a beam for transmitting the first information and at least one transmitting beam of the second terminal;

[0266] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal;

[0267] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the first terminal;

[0268] The first information is sent via a single beam.

[0269] The following takes the second terminal as UE1 and the first terminal as UE2 as an example to illustrate the conditions for UE1 to determine the transmission beam to UE2 to UE1.

[0270] For example, if the beam B4 used by UE2 to send the second signaling corresponds to the beam B1 used by UE1 to send the first signaling, after receiving the second signaling, UE1 can determine the beam B4 as the transmission beam used for unicast communication between UE2 and UE1.

[0271] For another example, a correspondence exists between the time domain resources and / or frequency domain resources used to transmit the second signaling on UE2 and the transmit beam of UE1. Transmit beam B2 of the second signaling corresponds to beam B1, and beam B1 corresponds to time-frequency domain resource n. If UE2 responds to the second signaling on time-frequency domain resource n, UE1 can simultaneously determine that UE1's transmit beam to UE2 is B1, and UE2's transmit beam to UE1 is B2.

[0272] For another example, there is a correspondence between the time domain resources and / or frequency domain resources for sending the second signaling on UE2 and the transmit beam of UE2. If the second signaling is sent in the default beam, initial beam, or low frequency, UE1 can map the time domain resources and / or frequency domain resources of the second signaling to beam B2 and use beam B2 as the transmit beam of UE2 to UE1.

[0273] In one implementation, the first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

[0274] In one embodiment, the PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

[0275] Figure 9 is a schematic flow chart of a sideline communication method 900 according to an embodiment of the present application. The method can optionally be applied to the system shown in Figure 1 or Figure 2, but is not limited thereto. In this method, when UE1 or UE2 acts as a transmitting terminal, reference can be made to the function of the first terminal in the above method embodiment. When UE1 or UE2 acts as a receiving terminal, reference can be made to the function of the second terminal in the above method embodiment. The first information may include at least one of the first signaling, the second signaling, the third signaling, and the fourth signaling. Specifically, the method includes at least part of the following content. For example, the method may include at least part of the steps S901 to S908.

[0276] S901. UE1 sends first signaling on a sidelink.

[0277] In one embodiment, the beam-related information indicated by the first signaling may include information about the transmitting beam of the UE1.

[0278] In an embodiment of the present application, the first signaling may explicitly or implicitly indicate information about the transmit beam of UE1. For example, the first signaling may carry information about the transmit beam of UE1. For another example, the information about the transmit beam of UE1 may be implicitly indicated by the time domain resources and / or frequency domain resources of the first signaling. In an embodiment of the present application, the transmit beam of UE1 indicated by the first signaling may be the beam that transmits the first signaling, or may be another beam unrelated to the first signaling, or may be a beam that requires measurement by UE2.

[0279] For example, UE1 sends first signaling S11 on beam B1 and first signaling S12 on beam B2. The first signaling S11 may indicate information about beam 1, and the first signaling S12 may indicate information about beam B2. For another example, UE1 sends first signaling S11 on beam B1 and first signaling S12 on beam B2. The first signaling S11 may indicate information about beams B1 and B2, and the first signaling S12 may indicate information about beams B1 and B2. For another example, UE1 sends first signaling S11, S12, and S13. The first signaling S11, S12, and S13 may indicate information about beams B1 and B3 that needs to be measured. The beams that need to be measured indicated by the first signaling S11, S12 and S13 may also be different. For example, the first signaling S12 may indicate information about beams B1 and B3 that need to be measured, and the first signaling S13 may indicate information about beams B2 and B3 that need to be measured.

[0280] In an embodiment of the present application, the terminal indicates beam-related information through information communicated with other terminals, and can use beam communication in the side link. It can use the beam to increase the signaling transmission speed, support a larger transmission volume, and thus can be suitable for high-frequency side communication.

[0281] In one embodiment, the information about the transmit beam of UE1 includes at least one of the following: identification information of the transmit beam of UE1, and time domain resources and / or frequency domain resources corresponding to the transmit beam of UE1. For example, if the transmit beam of UE1 includes beam B1, the first signaling may indicate at least one of the following: the ID of beam B1, the time slot or symbol corresponding to beam B1, and the RB, carrier, or frequency band corresponding to beam B1.

[0282] In one embodiment, the identification information of the transmission beam of UE1 is dedicated to UE1, dedicated to the cell, or uniformly configured for the entire network. For example, the identification information of the transmission beam dedicated to UE1 is B1. UE1 can send the first signaling on beam B1. For another example, the identification information of the transmission beam dedicated to the cell is B1 and B2. UE1 can send the first signaling on beams B1 and B2. For another example, the identification information of the transmission beam uniformly configured for the entire network is B1, B2, and B3. UE1 can send the first signaling on beams B1, B2, and B3.

[0283] In one embodiment, the correspondence between the transmit beam of UE1 and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network. For example, the protocol specifies or the network configures that beam B1 and time slot n have a correspondence, beam B2 and symbol i have a correspondence, or beam B3 and RBx have a correspondence. UE1 can send the first signaling on beam B1 at time slot n. UE1 can send the first signaling on beam B2 at symbol i. UE1 can send the first signaling on beam B2 at RBx. For another example, if UE1 sends the first signaling at time slot n, and time slot n and beam B1 have a correspondence, it means that UE1 selects beam B1 as the transmit beam of UE2 or the receive beam of UE1. For another example, if UE2 sends the first signaling at time slot n, and time slot n and beam B1 have a correspondence, it means that UE2 selects beam B1 as the transmit beam of UE1 or the receive beam of UE2.

[0284] In one embodiment, the first signaling indicates a measurement configuration for the transmit beam of UE1. In one embodiment, the measurement configuration for the transmit beam of UE1 includes at least one of the following: a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration for the transmit beam of UE1. The measurement quantity, measurement target, measurement threshold, and measurement report carrying method can be found in the description of the above method embodiment and are not further described here.

[0285] In one implementation, the first signaling is sent in a unidirectional or omnidirectional manner.

[0286] In one embodiment, UE1 may send the first signaling in a unidirectional transmission mode on the side link. The unidirectional transmission mode is more suitable for high-frequency side communication. For example, the UE1 repeatedly sends the first signaling in each beam of the UE1 using a beam scanning mode on the side link, see Figure 7b. The repeated transmission can be periodic repeated transmission or repeated transmission based on available resources. In an embodiment of the present application, the period of repeated transmission of the first signaling can be determined based on one of the following: network configuration, pre-configuration, protocol provisions and SL DRX. For another example, the UE1 simultaneously uses multiple beams to send the first signaling on the side link, see Figure 7c. For another example, the UE1 uses a beam, such as a default transmission beam, on the side link to send the first signaling to UE2.

[0287] In one implementation, UE1 may send the first signaling in an omnidirectional transmission manner on the sidelink, for example, using an omnidirectional antenna, as shown in FIG7 a .

[0288] In one embodiment, the first signaling may be a discovery message, a discovery request message, or a direct communication request (DCR) message. Beam-related information may be carried by a discovery message, a discovery request message, or a DCR message. For example, referring to FIG5 , during the unicast communication establishment process, the first signaling may be a discovery message in mode A of the discovery process. For another example, referring to FIG6 , the first signaling may be a discovery request message in mode B of the discovery process. The discovery request message may also be considered a discovery message. For another example, the first signaling may be a DCR message in a DCR message scheme. The first signaling may include an SCI, and the first signaling may be sent by unicast, multicast, or broadcast.

[0289] In one embodiment, the method 900 may further include:

[0290] S902: UE2 receives first signaling on the sidelink. The content and example of the first signaling can refer to the related description of the first signaling sent by UE1.

[0291] In some examples, during the unicast communication establishment process, after UE1 sends the first signaling in a unidirectional or omnidirectional manner, UE2 can receive the first signaling in a unidirectional or omnidirectional manner. In this case, UE1 is the sending terminal and UE2 is the receiving terminal.

[0292] In one implementation, UE2 may receive the first signaling in a unidirectional receiving manner on the sidelink.

[0293] For example, UE2 monitors various beams on the sidelink using beam scanning to receive the first signaling on one or more receive beams, as shown in Figure 7b. UE2 can monitor its beams using beam scanning at regular intervals, such as 1ms. If the first signaling is detected on a beam, that beam can be considered a receive beam. Using beam scanning, the first signaling may be received on one or more receive beams.

[0294] For another example, UE2 simultaneously monitors multiple beams on the sidelink to receive the first signaling on one or more receive beams (see Figure 7c). If UE2 has n beams, UE2 can simultaneously monitor m beams, where m is less than or equal to n. In this case, the first signaling may be monitored on m or fewer receive beams.

[0295] For another example, the UE1 receives the first signaling on a sidelink using a beam, such as a default receiving beam.

[0296] In one embodiment, the one or more receive beams used by UE2 to receive the first signaling are determined based on at least one of the following: implementation of UE2, network configuration, a default beam, received signal strength on the beam used to receive the first signaling, and the receive beam currently in use by UE2. For example, the implementation of UE2 may include the capabilities of UE2. For another example, if UE2 is currently using a receive beam to receive other signaling, the receive beam may be changed to receive the first signaling.

[0297] In one implementation, UE2 may receive the first signaling in an omnidirectional reception manner, such as an omnidirectional antenna, on the sidelink, as shown in FIG7 a .

[0298] In one embodiment, the method may further include: the UE2 measures the transmit beam of the monitored UE1. For example, if the first signaling indicates through measurement configuration that the transmit beams of UE1 that need to be measured are beam B1 and beam B2, and UE1 monitors beam B1, beam B2, and beam B3, beam B1 and beam B2 may be measured. By measuring the transmit beam of the monitored UE1, UE2 may determine the transmit beam of UE2 to UE1 based on the measurement result, or assist UE1 in determining the transmit beam to UE2. In addition, if the first signaling only indicates one transmit beam of UE1, the measurement step may not be performed, but the transmit beam may be used as the transmit beam of UE1 to UE2, or the transmit beam of UE2 to UE1 may be selected based on the transmit beam.

[0299] In one embodiment, the beam of the first signaling is measured in at least one of the following situations:

[0300] The first signaling is sent by the UE1 using a beam scanning manner;

[0301] The first signaling is sent on at least one transmit beam of UE1;

[0302] The first signaling instructs measurement of at least one transmit beam of UE1, for example, through a measurement configuration indication;

[0303] The protocol specifies that at least one transmit beam of UE1 be measured;

[0304] The network instructs measurement of at least one transmit beam of UE1.

[0305] For example, if UE1 uses a beam scanning method to send a first signaling through one or more beams, UE2 can measure each beam that sends the first signaling that is monitored. For another example, a first signaling indicates that the signaling that needs to be measured by the receiving terminal includes at least one transmitting beam of UE1. The transmitting beam that needs to be measured can be the beam that sends the first signaling, or it can be another beam. When UE2 monitors the first signaling, it can measure at least one transmitting beam of UE1 indicated by the first signaling. For another example, the protocol stipulates or the network instructs to measure the monitored beam, or to measure the beam indicated by the received signaling (for example, the transmitting beam of UE1 indicated by the first signaling).

[0306] In one embodiment, the transmission beam of the UE1 to the UE2 is selected by the UE2 based on the measurement result of the beam of the first signaling.

[0307] In the disclosed embodiment, UE2 can determine the transmission beam of UE1 to UE2 based on the first signaling. UE2 can subsequently inform UE1 of the transmission beam of UE1 to UE2 through a beam measurement report or other means, thereby assisting UE1 in selecting a transmission beam for unicast communication with UE2. The number of transmission beams determined by UE2 to be transmitted by UE1 to UE2 can be one or more.

[0308] In the embodiment of the present application, the measurement quantity, measurement target, measurement threshold referenced by UE2 measurement, and the carrying method of the beam measurement report after UE2 measurement can be found in the relevant description of the above method embodiment and will not be repeated here.

[0309] In some examples, UE2 determines that the transmission beam of UE1 to UE2 may include at least one of the following:

[0310] A beam with the best signal quality;

[0311] K beams with the best signal quality (beams ranked in top K by signal quality), where K is greater than 1;

[0312] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0313] The M beams with the best signal quality (the top M beams in signal quality ranking) whose signal quality meets the threshold condition, where M is greater than 1.

[0314] In one embodiment, as shown in FIG9 , the method 900 further includes: S903 , the UE2 sends a second signaling on the sidelink.

[0315] In one embodiment, the beam-related information indicated by the second signaling may include information about the transmitting beam of the UE2.

[0316] In an embodiment of the present application, after UE1 sends a first signaling, if a certain UE2 receives the first signaling, the UE2 may send a second signaling on the side link using a certain sending method based on the first signaling. Then, UE1 may receive the second signaling sent by the UE2 using the first receiving method. In this case, UE2 is a transmitting terminal and UE1 is a receiving terminal. In an embodiment of the present application, the second signaling may implicitly or explicitly indicate relevant information of the transmitting beam of UE2. For example, the second signaling carries information of the transmitting beam of UE2. For another example, the information of the transmitting beam of UE2 is implicitly indicated by the time domain resources and / or frequency domain resources of the second signaling. In an embodiment of the present application, the transmitting beam of UE2 indicated by the second signaling may be the beam that sends the second signaling, or other beams that are not related to the second signaling, or a beam that needs to be measured by UE1.

[0317] In one embodiment, the information about the transmit beam of UE2 indicated by the second signaling includes at least one of the following: identification information of the transmit beam of UE2, and time domain resources and / or frequency domain resources corresponding to the transmit beam of UE2. For example, if the transmit beam of UE2 includes beam B4, the second signaling may indicate at least one of the following: the ID of beam B4, the time slot or symbol corresponding to beam B4, the RB, carrier, or frequency band corresponding to beam B4, etc.

[0318] In one embodiment, the identification information of the transmission beam of UE2 is dedicated to UE2, dedicated to the cell, or uniformly configured for the entire network. For example, the identification information of the transmission beam dedicated to UE2 is B4. UE2 can send the second signaling on beam B4. For another example, the identification information of the transmission beam dedicated to the cell is B3 and B4. UE2 can send the second signaling on beams B3 and B4. For another example, the identification information of the transmission beam uniformly configured for the entire network is B3, B4, and B5. UE2 can send the first signaling on beams B3, B4, and B5.

[0319] In one embodiment, the correspondence between UE2's transmit beam and time-domain resources and / or frequency-domain resources is specified by the protocol or configured by the network. For example, the protocol specifies or the network configures a correspondence between beam B4 and time slot n, a correspondence between beam B5 and symbol i, or a correspondence between beam B6 and RBx. UE2 may send the second signaling on beam B4 in time slot n. UE2 may send the second signaling on beam B5 in symbol i. UE2 may send the first signaling on beam B6 in RBx.

[0320] In one embodiment, the second signaling indicates a measurement configuration for the transmit beam of UE2. In one embodiment, the measurement configuration for the transmit beam of UE2 includes at least one of the following: a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration for the transmit beam of UE2. The measurement quantity, measurement target, measurement threshold, and measurement report carrying method can be found in the description of the above method embodiment and are not further described here.

[0321] In an embodiment of the present application, after receiving the first signaling from UE1, UE2 may transmit a second signaling on the sidelink using a unidirectional or omnidirectional transmission mode based on the first signaling. If UE2 is able to determine the target transmit beam of UE2 to UE1 based on the first signaling, the second signaling may be transmitted to UE1 using the target transmit beam. If UE2 is unable to determine the target transmit beam of UE2 to UE1 based on the first signaling, the second signaling may be transmitted after performing beam measurement on at least one transmit beam indicated in the first signaling.

[0322] In one embodiment, the second signaling may indicate the measurement result and / or the selection result. The measurement result and / or the selection result may be included in the beam measurement report. In one embodiment, the signaling used for the measurement result, the selection result, and the related information indicating the transmission beam of UE2 may be the same signaling or different signaling.

[0323] In this embodiment of the present application, if UE2 measures one or more transmit beams indicated by the first signaling to UE1, the measurement results of the one or more transmit beams of UE1 may be indicated by the second signaling, or the second signaling may indicate the transmit beam selected by UE2 from UE1 to UE2 based on the measurement results. For example, the second signaling may indicate at least one of the ID of the transmit beam selected by UE2 and used by UE1 to UE2, the measurement result, etc.

[0324] In one implementation, the UE2 sends the second signaling in a unidirectional manner on the sidelink.

[0325] For example, UE2 repeatedly transmits the second signaling on each beam of UE2 using a beam scanning method on the sidelink, as shown in Figure 7b. The repeated transmission is periodic or based on available resources.

[0326] For another example, UE2 uses multiple transmission beams simultaneously to send the second signaling on the side link, see Figure 7c.

[0327] For another example, UE2 transmits the second signaling to UE1 on the sidelink using a beam, such as a default transmission beam or a target transmission beam. The target transmission beam may be the target transmission beam of UE2 to UE1.

[0328] In one embodiment, the one or more transmission beams of the second signaling are determined based on at least one of the following: the implementation of the UE2 and the corresponding relationship with the transmission beam of the UE1.

[0329] For example, the implementation of UE2 may include the capabilities of UE2. UE2 determines one or more transmit beams for sending the second signaling based on its own capabilities. For another example, UE2 determines one or more transmit beams for sending the second signaling based on a correspondence with the transmit beams of UE1 indicated by the first signaling.

[0330] In one implementation, UE2 may send the second signaling to UE1 in an omnidirectional transmission manner, such as using an omnidirectional antenna, on the sidelink.

[0331] In one embodiment, the second signaling may be a discovery response message or a DCR message. The response message or DCR message may carry beam-related information. For example, referring to FIG5 , during the unicast communication establishment process, the second signaling may be a DCR message in mode A of the discovery process. For another example, referring to FIG6 , the second signaling may be a discovery response message in mode B of the discovery process. For another example, the second signaling may be a DCR message in a DCR message scheme. The second signaling may include an SCI, which may carry beam-related information. The second signaling may be sent by unicast, multicast, or broadcast.

[0332] In one embodiment, the second signaling is a response message to the first signaling. For example, the first signaling is a discovery request message, and the second signaling is a discovery response message.

[0333] S904: The UE1 receives a second signaling on the sidelink. For details of the second signaling, refer to the above description of the second signaling sent by the UE2.

[0334] In one implementation, the second signaling is received in a unidirectional or omnidirectional manner.

[0335] In one embodiment, the UE1 receives the second signaling in a unidirectional receiving manner on the sidelink. The unidirectional receiving manner is more suitable for high-frequency sidelink communications.

[0336] For example, UE1 monitors each beam using a beam scanning method on the sidelink to receive the second signaling on one or more receive beams. Specifically, for example, UE1 can monitor its beams using a beam scanning method at regular intervals, such as 1ms. If the second signaling is detected on a beam, that beam can be considered a receive beam. Using a beam scanning method, the second signaling may be received on one or more receive beams.

[0337] For another example, UE1 simultaneously monitors multiple beams on the sidelink to receive the second signaling on one or more receive beams. Specifically, UE1 has n beams and can simultaneously monitor m beams, where m is less than or equal to n. In this case, UE1 may monitor the second signaling on m or fewer receive beams.

[0338] In one embodiment, the one or more receiving beams are determined based on at least one of: implementation of the UE1, network configuration, default beam, received signal strength on the beam used to receive the second signaling, correspondence with at least one transmitting beam of the UE1, and the receiving beam being used by the UE1.

[0339] For example, the implementation of UE1 may include UE1's capabilities, such as the number and directions of beams that can be received or simultaneously received. For another example, if the first signaling sent by UE1 indicates information about a transmit beam, UE1 may use the receive beam corresponding to the transmit beam to receive the second signaling. For another example, if UE1 is using the receive beam to receive other signaling, it may change the receive beam to receive the second signaling.

[0340] In one embodiment, the UE1 may receive the second signaling in an omnidirectional reception manner, such as an omnidirectional antenna, on the sidelink.

[0341] In one embodiment, UE1 may determine the transmission beam of UE2 to UE1 based on the second signaling. Subsequently, UE1 may inform UE2 of the transmission beam of UE2 to UE1 through a beam measurement report or other means, thereby assisting UE2 in selecting a transmission beam for unicast communication with UE1. The number of transmission beams determined by UE2 to UE1 may be one or more.

[0342] In some examples, UE1 determines that the transmission beam of UE2 to UE1 may include at least one of the following:

[0343] A beam with the best signal quality;

[0344] K beams with the best signal quality (beams ranked in top K by signal quality), where K is greater than 1;

[0345] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0346] The M beams with the best signal quality (the top M beams in signal quality ranking) whose signal quality meets the threshold condition, where M is greater than 1.

[0347] In one embodiment, UE1 determines the transmission beam of UE2 to UE1 based on at least one of the following conditions:

[0348] a correspondence between the beam for sending the second signaling and at least one transmit beam of UE1;

[0349] a correspondence between the time domain resources and / or frequency domain resources for sending the second signaling and at least one transmit beam of UE1;

[0350] a correspondence between time domain resources and / or frequency domain resources for sending the second signaling and at least one transmit beam of UE2;

[0351] The second signaling is sent through a single beam.

[0352] For example, if beam B4 of UE2 corresponds to beam B1 used by UE1 to send the first signaling, and UE2 sends the second signaling through beam B4, UE1 can determine beam B4 as the transmission beam used for unicast communication between UE2 and UE1.

[0353] For another example, there is a correspondence between the time domain resources and / or frequency domain resources used to transmit the second signaling and UE1's transmit beam. Transmit beam B2 of the second signaling corresponds to transmit beam B1 of UE1, and B1 corresponds to time-frequency domain resource n. If UE2 replies to the second signaling on time-frequency domain resource n, UE1 can simultaneously determine that UE1's transmit beam to UE2 is B1, and that UE2's transmit beam to UE1 is B2.

[0354] For another example, the correspondence between the time domain resources and / or frequency domain resources for sending the second signaling and the transmit beam of UE2. If the second signaling is sent in the default beam, initial beam, or low frequency, UE1 can map the time and frequency domain resources of the second signaling to beam B2 and use beam B2 as the transmit beam of UE2 to UE1.

[0355] In one embodiment, the method further includes: the UE1 measures at least one transmit beam of the monitored UE2. For example, if the second signaling indicates that the transmit beams of UE2 that need to be measured are beam B4 and beam B5, and UE1 monitors beam B4, beam B5, and beam B6, beam B4 and beam B5 can be measured. By measuring the transmit beam of the monitored UE2, the transmit beam of UE1 to UE2 can be determined based on the measurement result, and UE2 can be assisted in determining the transmit beam to UE1. In addition, if the second signaling only indicates one transmit beam B5 of UE2, the measurement step may not be performed, but the transmit beam B5 may be used as the transmit beam of UE2 to UE1, or the transmit beam of UE1 to UE2 may be selected based on the transmit beam B5.

[0356] In one embodiment, at least one transmit beam of UE2 is measured in at least one of the following situations:

[0357] The second signaling is sent by the UE2 using a beam scanning manner;

[0358] The second signaling is sent on at least one beam of UE2;

[0359] The second signaling instructs measurement of at least one transmit beam of UE2;

[0360] The protocol specifies that at least one transmit beam of UE2 be measured;

[0361] The network instructs measurement of at least one transmit beam of UE2.

[0362] For example, if UE2 uses a beam scanning method to send a second signaling through at least one transmit beam of UE2, UE1 can measure each beam that sends the second signaling that is monitored. For another example, a second signaling indicates that the signaling that needs to be measured by the receiving terminal includes one or more transmit beams of UE2. If UE1 monitors the second signaling, it can measure some or all of the transmit beams indicated by the second signaling. For another example, the protocol stipulates or the network instructs to measure the monitored beam or the beam indicated by the received signaling (for example, the transmit beam of UE2 indicated by the second signaling).

[0363] In one embodiment, UE1 determines the target transmission beam of UE1 to UE2 based on the second signaling.

[0364] In one embodiment, the UE1 determines the target transmission beam of the UE1 to the UE2 according to at least one of the following conditions:

[0365] a correspondence between the beam for sending the second signaling and the beam for sending the first signaling;

[0366] a correspondence between the time domain resources and / or frequency domain resources for sending the second signaling and at least one transmit beam of UE1;

[0367] One or more beam measurement reports included in the second signaling.

[0368] For example, based on the correspondence between beam B4 in the second signaling and beam B1 transmitted by UE1, UE1's target transmit beam for UE2 is determined to be beam B1. For another example, based on the correspondence between symbol i in the second signaling and beam B2 in the first signaling, UE1's target transmit beam for UE2 is determined to be beam B2. For another example, if the second signaling includes only one beam measurement report, and the transmit beam in that beam measurement report is B3, UE1's target transmit beam for UE2 is beam B3.

[0369] In one embodiment, the target transmission beam of UE1 to UE2 is selected from the beams in the multiple beam measurement reports in the second signaling. For example, if the second signaling includes multiple beam measurement reports, and the transmission beams in these beam measurement reports are B1, B2, and B3, UE1 can select beam B2 as the target transmission beam to UE2.

[0370] In one embodiment, the selected beam includes at least one of the following: a beam with the best signal quality; and a beam that meets a threshold condition.

[0371] For example, if beam B2 has the best signal quality among beams B1, B2, and B3, UE1 can select beam B2 as the target beam for UE2. For another example, if beam B1 meets the threshold criteria among beams B1, B2, and B3, UE1 can select beam B1 as the target beam for UE2. Selecting the beam with the best signal quality and / or meeting the threshold criteria helps improve sideline communication performance, such as increasing signaling transmission speed and reliability.

[0372] In one implementation, the second signaling may be a discovery response message or a DCR message.

[0373] In one embodiment, the method 900 further includes: S905 , the UE1 sends a third signaling on the sidelink.

[0374] In an embodiment of the present application, after UE1 receives the second signaling, it can send a third signaling on the sidelink based on the second signaling. If UE1 has determined a unique target transmission beam for UE2 in the above embodiment, it can send the third signaling on the target transmission beam to perform unicast communication with UE2.

[0375] In the embodiment of the present application, the indication method of the third signaling can be explicit or implicit. For example, the third terminal implicitly indicates the identification information of UE2's transmit beam B4 corresponding to B7 by sending beam B7 of the third signaling. For another example, the third terminal implicitly indicates the identification information of UE2's transmit beam B5 corresponding to time slot n by sending time slot n of the third signaling. For another example, the third terminal implicitly indicates the identification information of UE2's transmit beam B6 corresponding to time slot n by sending symbol i of the third signaling.

[0376] In one implementation, the third signaling may be sent in a unidirectional manner.

[0377] In one embodiment, the UE1 transmits the third signaling in a unidirectional manner on the sidelink. For example, the UE1 transmits the third signaling in a target transmission beam from the UE1 to the UE2 on the sidelink.

[0378] In one embodiment, the third signaling indicates a beam measurement report of UE2.

[0379] For example, the beam measurement report of UE2 may include at least one of the following:

[0380] a measurement result of at least one transmit beam of UE2;

[0381] Identification information of a beam related to a measurement result of at least one transmit beam of UE2;

[0382] Identification information of a beam selected based on the measurement result of at least one transmit beam of UE2.

[0383] In one embodiment, the third signaling indicates at least one of the following:

[0384] a beam for sending the third signaling that corresponds to at least one transmit beam of UE2;

[0385] The time domain resources and / or frequency domain resources for sending the third signaling correspond to at least one transmitting beam of UE2.

[0386] In some examples, the beam selected based on the measurement results of at least one transmitting beam of UE2 can refer to at least one of the following beams selected by UE1 above: one beam with the best signal quality, K beams with the best signal quality, N beams whose signal quality meets the threshold condition, and M beams with the best signal quality whose signal quality meets the threshold condition.

[0387] In one embodiment, the third signaling includes an SMC message or a DCR message. For example, during the unicast communication establishment process, the third signaling may be an SMC message in Mode A of the discovery process. For another example, the third signaling may be a DCR message in Mode B of the discovery process. For another example, the third signaling may be a DCR message in a DCR message scheme. The third signaling may include an SCI, which may carry beam-related information. The third signaling may be sent via unicast, multicast, or broadcast.

[0388] In one embodiment, as shown in Figure 9, the method 900 further includes: S906, the UE2 receives a third signaling on the sidelink. The content and example of the third signaling can refer to the relevant description of the third signaling sent by the UE1 above.

[0389] In the embodiment of the present disclosure, after UE1 sends the third signaling in a unidirectional sending manner, UE2 may receive the third signaling in a unidirectional or omnidirectional receiving manner.

[0390] In one embodiment, UE2 may receive the third signaling using a unidirectional reception mode on the sidelink. For example, UE2 monitors a target receive beam on the sidelink to receive the third signaling. For another example, UE2 simultaneously monitors multiple beams on the sidelink to receive the third signaling on one or more second target receive beams. UE2 may monitor the third signaling on only one target receive beam or on multiple target receive beams simultaneously using a unidirectional reception mode.

[0391] In one embodiment, the target receiving beam of UE2 is determined based on at least one of the following: a receiving beam for receiving the first signaling, a beam corresponding to the target transmitting beam of UE2 to UE1, a beam corresponding to the target transmitting beam of UE1 to UE2, a beam corresponding to the time domain resources and / or frequency domain resources of the first signaling and / or the third signaling, and a beam selected from beams obtained by using a beam scanning method. For example, UE2 selects the beam for receiving the first signaling as the target receiving beam of UE2. For another example, UE2 selects the corresponding beam of UE2's transmitting beam to UE1 as the target receiving beam of UE2. For another example, UE2 selects the corresponding beam of UE1's transmitting beam to UE2 as the target receiving beam of UE2. For another example, UE2 selects the corresponding beam of the time domain resources and / or frequency domain resources of the first signaling and / or the third signaling as the target receiving beam of UE2.

[0392] In one embodiment, UE2 may receive the third signaling in an omnidirectional reception manner on the sidelink.

[0393] In one embodiment, as shown in FIG9 , the method 900 further includes: S907 , the UE2 sends a fourth signaling on the sidelink.

[0394] In the embodiment of the present application, after UE1 sends the third signaling, if a UE2 receives the third signaling, the UE2 can send a fourth signaling to UE1 in a unidirectional manner on the sidelink based on the third signaling. In this case, UE2 is the transmitting terminal and UE1 is the receiving terminal.

[0395] In one implementation, the UE2 sends the fourth signaling in a unidirectional manner on the sidelink. For example, the UE2 sends the fourth signaling to the UE1 via a target transmit beam of the UE2 on the sidelink.

[0396] In one embodiment, the target transmission beam of UE2 is determined based on at least one of the following: a beam used to send the second signaling, a beam corresponding to the beam used to receive the third signaling, a beam corresponding to the time domain resources and / or frequency domain resources of the third signaling, and a beam in the beam measurement report in the third signaling. For example, the beam used to send the second signaling is selected as the target transmission beam of UE2. For another example, the corresponding beam of the beam used to receive the third signaling is selected as the target transmission beam of UE2. For another example, the corresponding beam of the time domain resources and / or frequency domain resources of the third signaling is selected as the target transmission beam of UE2. For another example, the beam in the beam measurement report in the third signaling is selected as the target transmission beam of UE2.

[0397] In one embodiment, the target transmit beam of UE2 is a beam selected from multiple beam measurement reports in the third signaling. If the third signaling includes only one beam measurement report, the beam in the beam measurement report may be used as the target transmit beam of UE2. If the third signaling includes multiple beam measurement reports, a beam from the multiple beam measurement reports may be selected as the target transmit beam of UE2.

[0398] In one embodiment, the selected beam includes at least one of the following: a beam with the best signal quality; and a beam that meets a threshold condition.

[0399] In one embodiment, the fourth signaling includes an SMC-ACK message, an SMC message, or a DCR message. For example, during unicast communication establishment, the fourth signaling may be an SMC-ACK message in mode A. For another example, the fourth signaling may be an SMC message in mode B. For another example, the fourth signaling may be a DCR message in a DCR message scheme. The fourth signaling may include an SCI, which may carry beam-related information. The fourth signaling may be sent by unicast, multicast, or broadcast.

[0400] In one embodiment, the method 900 further includes: S908 , the UE1 receives fourth signaling on the sidelink.

[0401] In one implementation, the fourth signaling is received in a unidirectional or omnidirectional manner.

[0402] In one embodiment, UE1 receives the fourth signaling using a unidirectional reception method on the sidelink. For example, UE1 monitors its target receive beam on the sidelink to receive the fourth signaling. For another example, UE1 simultaneously monitors multiple beams on the sidelink to receive the fourth signaling on one or more target receive beams of UE1. Using the unidirectional reception method, UE1 may monitor the fourth signaling on only one target receive beam or on multiple target receive beams simultaneously.

[0403] In one embodiment, the target receiving beam of the UE1 is determined based on at least one of the following: a beam for receiving the second signaling, a beam corresponding to the target transmitting beam of the UE2 to the UE1, a beam corresponding to the target transmitting beam of the UE1 to the UE2, and a beam corresponding to the time domain resources and / or frequency domain resources of the second signaling and / or the fourth signaling. For example, the beam for receiving the second signaling is selected as the target receiving beam of the UE1. For another example, the beam corresponding to the transmitting beam of the UE2 to the UE1 is selected as the target receiving beam of the UE1. For another example, the beam corresponding to the transmitting beam of the UE1 to the UE2 is selected as the target receiving beam of the UE1. For another example, the beam corresponding to the time domain resources and / or frequency domain resources of the second signaling and / or the fourth signaling is selected as the target receiving beam of the UE1.

[0404] In one implementation, the UE1 receives the fourth signaling in an omnidirectional reception manner, such as an omnidirectional antenna, on the sidelink.

[0405] In one embodiment, the transmission beam of UE2 to UE1 is determined based on the beam for which UE1 receives the fourth signaling. If, in the above embodiment, UE1 has not yet determined the transmission beam of UE2 to UE1, the beam for which UE1 receives the fourth signaling can be determined as the transmission beam of UE2 to UE1. For example, if the beam for which UE1 receives the fourth signaling is B4, the transmission beam of UE2 to UE1 is B4. For another example, if the beam for which UE1 receives the fourth signaling is B4, the transmission beam corresponding to beam B4 is received, and the transmission beam of UE2 to UE1 is B2.

[0406] In one embodiment, the period of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provision, and SL DRX.

[0407] In one embodiment, the receiving terminal matches at least one of the period, configuration, and mode of the beam scanning method of the transmitting terminal. For example, if UE1 is the transmitting terminal of the first signaling and UE2 is the transmitting terminal of the first signaling, the beam scanning method used by UE1 and UE2 can have the same period.

[0408] In one embodiment, the beam that the UE1 needs to monitor when receiving the second signaling and / or the fourth signaling is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, based on the capabilities of the UE1, and based on the characteristics of the UE1.

[0409] In one implementation, the SL DRX mode of one or more of the first signaling, the second signaling, the third signaling, and the fourth signaling may be configured.

[0410] Currently, there is no beamforming (BF)-based transmission and reception on the SL. The embodiment of the present application combines the unicast communication establishment process with beamforming-based transmission and reception to provide a side communication method. The side communication method may include the beam usage and beam selection process of the signaling interaction during the unicast communication establishment process. The sending and receiving methods of the beamforming-based signaling in the side communication method may include the following examples:

[0411] (1) All signaling is sent in one direction, and all signaling is received in one direction;

[0412] (2) All signaling is sent in one direction, and all signaling is received in one direction;

[0413] (3) The sending of all signals is unidirectional, the receiving of some signals is omnidirectional, and the receiving of some signals is unidirectional;

[0414] (4) Some signaling is sent in an omnidirectional manner, some signaling is sent in a unidirectional manner, some signaling is received in an omnidirectional manner, and some signaling is received in a unidirectional manner;

[0415] (5) The sending of some signaling is omnidirectional, the sending of some signaling is unidirectional, and the receiving of all signaling is unidirectional.

[0416] In the embodiments of the present application, the interaction between the UE and the network is not described in detail. Some configurations may come from the network, and the UE may also report to the network after determining to send a beam.

[0417] In the embodiment of the present application, the signaling of the discovery process is taken as an example for illustration. The signaling involved includes a discovery message, a DCR message, an SMC message, etc., and may also include other communication processes or other signaling, which is not limited here.

[0418] The signaling interaction of the PC5 unicast establishment process is shown in Figure 5 for the discovery method based on Model-A, and in Figure 6 for the discovery method based on Model-B.

[0419] For example, the sending mode, receiving mode, beam selection, etc. of some signaling involved in the unicast establishment process can be seen in Table 1:

[0420] Table 1

[0421] Example 1: All signaling is sent in one direction, and all signaling is received in one direction.

[0422] Step 1. Send the first signaling message (first signaling) during the unicast establishment process. This signaling message may carry a discovery message for model A, a discovery solicitation message for model B, or a DCR message. For example, the first signaling message may include SCI information, which may indicate beam-related information in the first signaling message. The first signaling message may be sent as a unicast, multicast, or broadcast message.

[0423] Step 1-1.UE1(Tx):

[0424] UE1 transmits the first signaling in a unidirectional manner. For example, UE1 repeatedly transmits the first signaling in each transmit beam in a beam scanning manner. The repeated transmissions may be periodic or based on available resources. The transmit beam may be determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, UE capabilities, or UE capability characteristics.

[0425] The ID information of UE1's transmitting beam may be carried in the first signaling. The first signaling may implicitly indicate the ID information of UE1's transmitting beam by using the correspondence between UE1's transmitting beam and the time-frequency resources of the first signaling. The first signaling may implicitly indicate the ID information of UE1's transmitting beam by using specific time-frequency resources. The transmitting beam of UE1 may include the beam used to send the first signaling, and may also include the beam used to send other signaling. In an embodiment of the present application, the time-frequency resources may include time domain resources and / or frequency domain resources. The ID information of the beam may be UE-specific, cell-specific, or uniformly configured for the entire network. The correspondence between the beam and the time-frequency resources may be specified by the protocol or configured by the network.

[0426] The sending of the first signaling may take into account the configuration of the SL DRX, such as the DRX configuration applied to broadcast, multicast or default.

[0427] Step 1-2.UE2 (Rx):

[0428] UE2 receives the first signaling in an omnidirectional receiving manner.

[0429] UE2 measures the monitored beam. The measurement quantity may be at least one of L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, and L3-RSRQ. The measurement quantity may be configured by the network, specified by the protocol, or configured by UE1. The measurement target may include at least one of a measurement signal, a measurement channel, and measurement information. For example, the measurement signal may be a CSI-RS signal, the measurement information may be SCI information, MAC CE information, etc., and the measurement channel may be a PSCCH, PSSCH, or PSFCH, etc. The measurement target may be configured by UE1.

[0430] UE2 can select a beam based on the measurement results, for example, selecting a beam for UE2 to transmit to UE1. The following is an example of UE2 selecting a beam:

[0431] Select a beam with the best signal quality based on the measurement results;

[0432] Based on the measurement results, K beams with the best signal quality are selected, where K is a network configuration, UE1 configuration, or protocol specification.

[0433] Based on the measurement results, N beams with signal quality higher than a configured threshold are selected. The threshold is configured by the network, UE1, or protocol.

[0434] Based on the measurement results, M beams with the best signal quality whose signal quality is higher than a configured threshold are selected. M and / or the threshold may be configured by the network, configured by UE1, or specified by the protocol.

[0435] UE2 may also not make a selection and only perform measurement.

[0436] Step 2. Send a second signaling message (second signaling) during the unicast establishment process. For example, this signaling message may be a discovery response message carrying mode (model B) or a DCR message carrying mode A. For example, this second signaling message may include SCI information, which may indicate beam-related information in the second signaling message. This second signaling message may be sent as a unicast message.

[0437] Step 2-1.UE2(Tx):

[0438] UE2 sends the second signaling in a unidirectional manner.

[0439] For example, UE2 repeatedly transmits the second signaling on each transmission beam in a beam scanning manner. The repeated transmission may be periodic or based on available resources.

[0440] For another example, UE2 selects a transmit beam to send the second signaling. The selected transmit beam can be a beam implemented by the UE or obtained by performing beam mapping based on the beam containing the first signaling. The beam mapping is a network configuration, pre-configuration, or protocol specification. Beam mapping may also be referred to as beam correspondence or beam correspondence relationship.

[0441] UE2 indicates (explicitly or implicitly) through the second signaling whether UE1 needs to perform measurement, beam ID information to be fed back, and at least one of the measurement results of the corresponding beam. Alternatively, the second signaling transmission method of UE2 can be specified by the network instruction or protocol, for example, based on the above-mentioned beam scanning method or beam selection method.

[0442] The available transmit beams of UE2 may be determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, UE capabilities, and UE characteristics.

[0443] The ID information of UE2's transmit beam may be carried in the second signaling. The second signaling may implicitly indicate the ID information of UE2's transmit beam by using the correspondence between UE2's transmit beam and the time-frequency resources of the second signaling. The second signaling may implicitly indicate the ID information of UE2's transmit beam by using specific time-frequency resources. The transmit beam of UE2 may include the beam used to send the second signaling, and may also include the beam used to send other signaling. The ID information of UE1's transmit beam indicated by the first signaling may be the same as or different from the ID information of UE2's transmit beam indicated by the second signaling. The ID information of UE2's transmit beam may be UE-specific, cell-specific, or uniformly configured for the entire network. The correspondence between the ID information of UE2's transmit beam and the time-frequency resources may be specified by the protocol or configured by the network.

[0444] The second signaling may carry a measurement result of a beam (for example, one or more transmit beams of the UE1) and / or an indication of a selection result of a corresponding beam, as shown in the following example:

[0445] For example, based on the measurement result in step 1, the ID information and / or measurement result of the corresponding one or more beams are indicated. Alternatively, based on the selection result after the measurement in step 1, the ID information and / or measurement result of the corresponding one or more beams are indicated.

[0446] For another example, the selected transmission beam of UE1 to UE2 is indicated implicitly through beam mapping (beam correspondence) or through the correspondence between time-frequency domain resources and beams. For example, the selected transmission beam of UE1 to UE2 is indicated by the correspondence between the beam through which UE2 sends the second signaling and the beam through which UE1 sends the first signaling, or the selected transmission beam of UE1 to UE2 is indicated by the correspondence between the time-frequency domain resource position through which UE2 sends the second signaling and the beam through which UE1 sends the first signaling.

[0447] UE2 may also feedback the measurement result and / or selection result through other information other than the second signaling, such as PSFCH, PSCCH, PSSCH, or MAC CE information. Optionally, the other information is information associated with the first signaling and / or the second signaling, such as PSFCH feedback information associated with the first signaling, or SCI information carried by the second signaling, or MAC CE information that can be multiplexed with the second signaling.

[0448] The sending of the second signaling may take into account the configuration of the SL DRX, such as the DRX configuration applied to broadcast, multicast or default.

[0449] Step 2-2.UE1(Rx):

[0450] UE1 receives the second signaling in an omnidirectional receiving manner.

[0451] UE1 determines the beam that UE1 transmits to UE2. For example, in at least one of the following situations, UE1 determines that the beam for transmitting the second signaling is the beam that UE1 transmits to UE2: there is a correspondence between the beam through which UE2 transmits the second signaling and the beam through which UE1 transmits the first signaling, there is a correspondence between specific time-frequency resources and the beam through which the second signaling is transmitted, and UE2 transmits the second signaling only on a single beam (e.g., in a non-beam scanning manner).

[0452] In addition to the above situations (for example, when UE2 sends the second signaling in a beam scanning manner), or according to the second signaling, protocol requirements, or network instructions, UE1 needs to measure the beam and provide feedback. In this case, UE1 can measure the monitored beam. The measurement quantity, measurement target, etc. can be described in the relevant description of steps 1-2 above. The measurement quantity can be configured by the network, specified by the protocol, or configured by UE1. The measurement target can be configured by UE2.

[0453] UE1 can select a transmission beam based on the measurement results, for example, the transmission beam of UE1 to UE2. The following is an example of UE1 selecting a beam:

[0454] Select a beam with the best signal quality based on the measurement results;

[0455] Based on the measurement results, K beams with the best signal quality are selected, where K is a network configuration, UE2 configuration, or protocol specification.

[0456] Based on the measurement results, N beams with signal quality higher than a configured threshold are selected. The threshold is configured by the network, UE2, or protocol.

[0457] Based on the measurement results, the M best beams with signal quality higher than the configured threshold are selected. The beams with the best signal quality, M and / or the threshold can be configured by the network, UE2 or specified by the protocol.

[0458] UE1 may also not make any selection and only perform measurement.

[0459] Step 3. Send a third signaling message (third signaling) during the unicast establishment process. This signaling message may be a signaling message carrying an SMC message or a DCR message. The third signaling message may include SCI information, which may indicate beam-related information in the third signaling message. The third signaling message may be sent as a unicast message.

[0460] Step 3-1.UE1(Tx):

[0461] UE1 determines the transmission beam of UE1 to UE2 based on the second signaling sent by UE2.

[0462] For example, if the beam for sending the second signaling corresponds to the beam for sending the first signaling, or if the beam for sending the second signaling corresponds to the time-frequency domain resources of the second signaling, UE1 can derive the transmission beam of UE1 to UE2 based on any of the above correspondences. If there is only one beam measurement report in the second signaling, UE1 can determine that the beam in the one beam measurement report is the transmission beam of UE1 to UE2.

[0463] For another example, if the second signaling includes more than one beam measurement report, UE1 may select one of the beams in the beam measurement report as the beam to be transmitted by UE1 to UE2. For example, the beam with the best signal quality and / or that meets a threshold condition may be selected. The threshold condition may be configured by the network, specified by the protocol, configured by UE1, or configured by UE2.

[0464] UE1 sends the third signaling in a unidirectional manner. If UE1 does not determine the transmission beam of UE1 to UE2 in step 2-2, the third signaling may carry an indication of the measurement result of the beam (e.g., the transmission beam of UE2) / the selection result of the corresponding beam, as shown in the following example:

[0465] For example, based on the measurement result in step 2-2, the ID information and / or measurement result of the corresponding one or more beams is indicated. Alternatively, based on the selection result in step 2, the ID information and / or measurement result of the corresponding one or more beams is indicated. The beam ID information indicated in the third signaling may be different from the beam ID information indicated in the second signaling.

[0466] For another example, the selected UE2 transmit beam to UE1 is implicitly indicated through beam mapping (beam correspondence) or through the correspondence between time-frequency domain resources and beams. For example, the correspondence between the beam used by UE1 to send the third signaling and the beam used by UE2 to send the second signaling is indicated, or the correspondence between the time-frequency domain resource location used by UE1 to send the third signaling and the beam used by UE2 to send the second signaling is indicated.

[0467] UE1 may also feed back the measurement result and / or selection result through other information besides the third signaling, such as PSFCH, PSCCH, PSSCH, or MAC CE information. Optionally, the other information is information associated with the second signaling and / or the third signaling, such as PSFCH feedback information associated with the second signaling, or SCI information carried by the third signaling, or MAC CE information that may be multiplexed with the third signaling.

[0468] Step 3-2.UE2 (Rx):

[0469] UE2 receives the third signaling in an omnidirectional receiving manner.

[0470] UE2 determines that the beam receiving the third signaling is the transmitting beam of UE1 to UE2.

[0471] Step 4. Sending a fourth signaling message (fourth signaling) during the unicast establishment process. This signaling message may be a signaling message carrying an SMC-ACK message or an SMC message. This fourth signaling message may include SCI information, which may indicate beam-related information in the fourth signaling message. This fourth signaling message may be sent as a unicast message.

[0472] Step 4-1.UE2(Tx):

[0473] UE2 determines the transmission beam of UE2 to UE1 based on the third signaling sent by UE1.

[0474] For example, if the beam for sending the third signaling corresponds to the beam for sending the second signaling, or if the beam for sending the third signaling corresponds to the time-frequency domain resources of the third signaling, UE2 can derive the transmission beam of UE2 to UE1 based on any of the above correspondences. If there is only one beam measurement report in the third signaling, UE1 can determine that the beam in the one beam measurement report is the transmission beam of UE2 to UE1.

[0475] For another example, if the third signaling includes more than one beam measurement report, UE2 may select one of the beams in the beam measurement report as the transmission beam for UE1. For example, the beam with the best signal quality and / or that meets a threshold condition may be selected. The threshold condition may be configured by the network, specified by the protocol, or configured by UE1 or UE2.

[0476] Step 4-2.UE1(Rx):

[0477] UE1 receives the fourth signaling in an omnidirectional receiving manner.

[0478] UE1 determines that the beam of the received fourth signaling is the transmitting beam of UE2 to UE1.

[0479] Example 2: All signaling is sent in one direction, some signaling is received in all directions, and some signaling is received in one direction.

[0480] Step 1: Sending the first signaling (first signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0481] Step 1-1.UE1(Tx):

[0482] UE1 sends the first signaling in a unidirectional manner, and the specific content may be the same as that in Example 1.

[0483] Step 1-2.UE2 (Rx):

[0484] UE2 receives the first signaling in an omnidirectional receiving manner, and the specific content may be the same as in Example 1.

[0485] Step 2: Sending the second signaling (second signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0486] Step 2-1.UE2 (Tx): UE2 sends the second signaling in a unidirectional manner, and the specific content can be the same as in Example 1.

[0487] Step 2-2.UE1(Rx):

[0488] UE1 may receive the second signaling in a unidirectional receiving manner or an omnidirectional receiving manner, as follows.

[0489] (1) An example of a one-way receiving method is as follows:

[0490] UE1 monitors the messages on a specific beam in a one-way reception mode.

[0491] For example, if there is a beam correspondence and / or a correspondence between time-frequency domain resources, the specific beam is a beam obtained based on any of the above correspondences.

[0492] For another example, UE1 receives the second signaling in a beam sweeping manner, wherein the beam sweeping may be periodic, and the period may be configured, pre-configured, specified by a protocol, and / or related to SL DRX.

[0493] In the unidirectional receiving mode, the specific content of UE1 determining the transmission beam of UE1 to UE2 can be referred to the relevant description of the omnidirectional receiving mode in step 2-2 of Example 1.

[0494] (2) UE1 receives the second signaling in an omnidirectional receiving manner, and the specific content may be the same as in Example 1.

[0495] Step 3: Sending the third signaling (third signaling) during the unicast establishment process. This signaling can be the same as that in Example 1.

[0496] Step 3-1.UE1 (Tx): can be the same as Example 1.

[0497] Step 3-2.UE2 (Rx):

[0498] UE2 receives the third signaling in an omnidirectional receiving manner.

[0499] UE2 monitors messages on a specific beam in a unidirectional reception mode. If a beam correspondence and / or time-frequency domain resource correspondence exists, the specific beam is a beam derived based on any of the above correspondences. UE2 determines that the beam receiving the third signaling is the beam transmitted by UE1 to UE2.

[0500] Step 4: Sending the fourth signaling (fourth signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0501] Step 4-1.UE2 (Tx): can be the same as Example 1.

[0502] Step 4-2.UE1(Rx):

[0503] UE1 monitors messages on a specific beam in unidirectional reception mode. If a receive beam has been determined in step 2-2, it uses that beam for subsequent communication with UE2. If omnidirectional reception is used in step 2-2 and a beam correspondence and / or time-frequency domain resource correspondence exists, the specific beam is the beam derived based on any of these correspondences.

[0504] Example 3: All signaling is sent in one direction, and all signaling is received in one direction;

[0505] Step 1: Sending the first signaling (first signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0506] Step 1-1.UE1 (Tx): can be the same as Example 1.

[0507] Step 1-2.UE2 (Rx):

[0508] UE2 monitors messages on each beam in a unidirectional reception manner. For example, UE2 receives the first signaling in a beam sweeping manner. The beam sweeping may be periodic, and its period may be configured, pre-configured, specified by the protocol, and / or related to SL DRX.

[0509] At least one of the period, configuration, and pattern of the beam sweeping is matched to the Tx end. For example, when the Tx end uses the first beam, the Rx end performs one round of receive beam sweeping. Subsequently, when the Tx end uses the second beam, the Rx end performs a second round of receive beam sweeping.

[0510] For other details, please refer to steps 1-2 of Example 1.

[0511] Step 2: Sending the second signaling (second signaling) during the unicast establishment process. This signaling can be the same as that in Example 1.

[0512] Step 2-1.UE2 (Tx): can be the same as Example 1.

[0513] Step 2-2.UE1(Rx):

[0514] UE1 monitors the messages on a specific beam in a one-way reception mode.

[0515] For example, if there is a beam correspondence and / or a correspondence between time-frequency domain resources, the specific beam is a beam obtained based on any of the above correspondences.

[0516] For another example, UE1 receives the second signaling in a beam scanning manner. The beam scanning may be periodic, and its period may be configured, pre-configured, specified by a protocol, and / or related to SL DRX. At least one of the period, configuration, and mode of the beam scanning matches the Tx end.

[0517] For other details, please refer to step 2-2 of Example 1.

[0518] Step 3: Sending the third signaling (third signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0519] Step 3-1.UE1 (Tx): can be the same as Example 1.

[0520] Step 3-2.UE2 (Rx):

[0521] UE2 monitors the messages on a specific beam in a one-way reception mode;

[0522] For example, if there is a beam correspondence and / or a correspondence between time-frequency domain resources, the specific beam is a beam obtained based on any of the above correspondences.

[0523] For another example, UE2 uses the receiving beam (Rx beam) selected when receiving in the beam scanning mode in step 1-2.

[0524] For other details, please refer to step 3-2 of Example 1.

[0525] Step 4: Sending the fourth signaling (fourth signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0526] Step 4-1.UE2 (Tx): can be the same as Example 1.

[0527] Step 4-2.UE1(Rx):

[0528] UE1 monitors messages on a specific beam in a one-way reception mode. If the receiving beam has been determined in step 2-2, the beam is used for subsequent reception of communications with UE2.

[0529] Example 4: Some signaling is sent in omnidirectional mode, some signaling is sent in unidirectional mode, some signaling is received in omnidirectional mode, and some signaling is received in unidirectional mode.

[0530] Step 1: Sending the first signaling (first signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0531] Step 1-1.UE1(Tx):

[0532] UE1 sends the first signaling in a unidirectional sending manner or an omnidirectional sending manner.

[0533] (1) UE1 sends the first signaling in a unidirectional manner, and the specific content may be the same as that in Example 1.

[0534] (2) UE1 sends the first signaling in an omnidirectional transmission mode, which may specifically include: UE1 sends the first signaling in an omnidirectional transmission mode, and carries measurement configuration information of the available transmission beam in the first signaling: reference signal configuration (for example, CSI-RS signal configuration), measurement quantity configuration (for example, the reference signal can be L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ), threshold configuration, measurement report configuration, etc.

[0535] Step 1-2.UE2 (Rx):

[0536] UE2 receives the first signaling in a unidirectional receiving manner or an omnidirectional receiving manner.

[0537] (1) If monitoring messages on each beam in a unidirectional reception manner, UE2 may receive the first signaling on any receive beam. For example, the receive beam may be determined based on UE implementation, network configuration, a default beam, or a currently used receive beam. Alternatively, the first signaling may be received in the unidirectional reception manner described in Example 2 or Example 3.

[0538] UE2 measures the beam of UE1 according to the measurement configuration, where the measurement amount may be a configured measurement amount.

[0539] UE2 may select a beam based on the measurement result, for example, selecting a transmission beam of UE2 to UE1. For specific examples, please refer to the above related description.

[0540] UE2 may also not make a selection and only perform measurement.

[0541] For other content, please refer to the relevant descriptions in Examples 1, 2, and 3.

[0542] (2) For the omnidirectional receiving mode, please refer to the description of steps 1-2 of Example 1.

[0543] Step 2: Sending the second signaling (second signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0544] Step 2-1.UE2(Tx):

[0545] (1) Omnidirectional transmission: UE2 sends the second signaling in omnidirectional transmission mode, and carries the measurement configuration information of the available transmit beam in the second signaling. The specific content may include: reference signal configuration (for example, CSI-RS signal configuration), measurement quantity configuration (for example, the reference signal may be L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ), threshold configuration, measurement report configuration, etc.

[0546] (2) Unidirectional transmission: The beam for unidirectional transmission is determined based on the beam correspondence of the measurement results in steps 1-2 of this example. It can be assumed here that a single beam is selected based on the measurement results.

[0547] For other details, please refer to the description of step 2-1 in Example 1.

[0548] Step 2-2.UE1(Rx):

[0549] UE1 receives the second signaling in an omnidirectional receiving manner or a unidirectional receiving manner.

[0550] For example, if UE1 monitors messages on a specific beam in unidirectional reception mode and UE2 sends the second signaling in omnidirectional transmission mode, UE1 can receive the second signaling on any receive beam. The receive beam can be based on UE implementation, network configuration, default beam, or currently used receive beam.

[0551] For another example, the second signaling is received in the unidirectional receiving manner in Examples 2 and 3.

[0552] UE1 measures the beam of UE2 according to the measurement configuration, where the measurement amount is the configured measurement amount.

[0553] UE1 may select a transmission beam based on the measurement result, for example, the transmission beam of UE1 to UE2. For specific examples, please refer to the above related description.

[0554] UE1 may also not make any selection and only perform measurement.

[0555] For other details, please refer to the relevant descriptions in Examples 1, 2, and 3.

[0556] Step 3: Sending the third signaling (third signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0557] Step 3-1.UE1(Tx):

[0558] UE1 sends the third signaling in a unidirectional manner. UE1 can determine the transmission beam to UE2 based on the report of UE2. The specific content of this step can be the same as that of Example 1.

[0559] Step 3-2.UE2 (Rx):

[0560] UE2 receives the third signaling in an omnidirectional receiving manner or a unidirectional receiving manner. For details, please refer to the relevant content of Example 1, Example 2 or Example 3.

[0561] Step 4: Sending the fourth signaling (fourth signaling) during the unicast establishment process. This signaling may be the same as that in Example 1.

[0562] Step 4-1.UE2(Tx):

[0563] UE2 sends the fourth signaling in a unidirectional manner. The transmission beam of UE2 to UE1 can be determined based on the report of UE1, and the specific content can be the same as that in Example 1.

[0564] Step 4-2.UE1(Rx):

[0565] UE1 receives the fourth signaling in an omnidirectional receiving manner or a unidirectional receiving manner. For details, please refer to the relevant description of Example 1, Example 2 or Example 3.

[0566] Figure 10 is a schematic block diagram of a first terminal 1000 according to an embodiment of the present application. The first terminal 1000 may include: a sending unit 1010, configured to send first information indicating beam-related information in a first sending manner on a sidelink.

[0567] In one embodiment, the beam-related information includes information about the transmit beam of the first terminal.

[0568] In one embodiment, the information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

[0569] In one embodiment, the identification information of the transmission beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

[0570] In one embodiment, the correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by a protocol or configured by a network.

[0571] In one embodiment, the beam-related information includes a measurement configuration of the transmit beam of the first terminal.

[0572] In one embodiment, the measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

[0573] In one embodiment, the beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

[0574] In one embodiment, the beam measurement report includes at least one of the following:

[0575] a measurement result of at least one transmit beam of the second terminal;

[0576] identification information of a beam related to a measurement result of at least one transmit beam of the second terminal;

[0577] Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

[0578] In one embodiment, the beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following:

[0579] A beam with the best signal quality;

[0580] K beams with the best signal quality, where K is greater than 1;

[0581] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0582] The M beams with the best signal quality that meet the threshold condition, where M is greater than 1.

[0583] In one embodiment, the beam measurement report is carried through at least one of the following: PSFCH, PSCCH, PSSCH, and MAC CE.

[0584] In one embodiment, the beam-related information includes at least one of the following:

[0585] a beam for transmitting the first information that corresponds to at least one transmitting beam of the second terminal;

[0586] The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmitting beam of the second terminal.

[0587] In one embodiment, as shown in FIG11 , the first terminal 1100 may include the aforementioned sending unit 1010, and may further include:

[0588] The measuring unit 1110 is configured to measure at least one transmit beam of the monitored second terminal.

[0589] In one embodiment, the beam that the first terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the first terminal, and characteristics of the first terminal.

[0590] In one embodiment, the measurement quantity of the beam measurement includes at least one of the following:

[0591] L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

[0592] In one implementation, the measurement variable is a network configuration, a protocol provision, or a configuration of the first terminal.

[0593] In one embodiment, the measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel, and measurement information;

[0594] The measurement signal includes a CSI-RS, the measurement channel includes at least one of a PSCCH, a PSSCH, and a PSFCH, and the measurement information includes at least one of an SCI and MAC CE information.

[0595] In one embodiment, the sending unit 1010 is further configured to:

[0596] The first terminal repeatedly sends the first information on each beam of the first terminal using a beam scanning method on the sidelink;

[0597] The first terminal uses multiple beams on the sidelink to simultaneously send the first information on each beam of the first terminal;

[0598] The first terminal transmits the first information on each beam of the first terminal using a beam on a sidelink.

[0599] In one embodiment, the repeated transmission is periodic repeated transmission or repeated transmission based on available resources.

[0600] In one embodiment, the period and / or interval of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provision, and SL DRX.

[0601] In one embodiment, the first terminal uses one beam on the sidelink to send the first information on each beam of the first terminal, including at least one of the following:

[0602] The first terminal transmits the first information through a target transmit beam on a sidelink;

[0603] The first terminal transmits the first information through a default transmit beam on a sidelink.

[0604] In one embodiment, the first sending mode is a unidirectional sending mode.

[0605] In one embodiment, the condition for sending the first information in the first sending mode includes at least one of the following:

[0606] The first terminal has determined a target transmit beam;

[0607] Sending the first information by unicast;

[0608] The protocol stipulates / network configuration adopts a first sending mode to send the first information;

[0609] An upper layer instructs to use a first sending mode to send the first information;

[0610] The upper layer indicates that the sending mode corresponding to the service, L2ID or configuration file associated with the first information is the first sending mode.

[0611] In one implementation, the first sending mode is an omnidirectional sending mode.

[0612] In one embodiment, the condition for sending the first information in the first sending mode includes at least one of the following:

[0613] The first terminal fails to determine a target transmit beam;

[0614] Sending the first information by multicast or broadcast;

[0615] The protocol stipulates / network configuration adopts a first sending mode to send the first information;

[0616] An upper layer instructs to use a first sending mode to send the first information;

[0617] The upper layer indicates that the sending mode corresponding to the service, L2ID or configuration file associated with the first information is the first sending mode.

[0618] In one implementation, the first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

[0619] In one embodiment, the PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

[0620] The first terminal of the embodiment of the present application can implement the corresponding functions of the first terminal in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the first terminal can be found in the corresponding descriptions in the above-mentioned method embodiments, which will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the first terminal of the application embodiment can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0621] Figure 12 is a schematic block diagram of a second terminal 1200 according to an embodiment of the present application. The second terminal 1200 may include: a receiving unit 1210, configured to receive first information indicating beam-related information in a first receiving mode on a sidelink.

[0622] In one embodiment, the beam-related information includes information about a transmitting beam of the first terminal.

[0623] In one embodiment, the information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

[0624] In one embodiment, the identification information of the transmission beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

[0625] In one embodiment, the correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by a protocol or configured by a network.

[0626] In one embodiment, the beam-related information includes a measurement configuration of the transmit beam of the first terminal.

[0627] In one embodiment, the measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement quantity configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

[0628] In one embodiment, as shown in FIG12 , the second terminal 1300 may include a receiving unit 1210 and may further include:

[0629] The measuring unit 1310 is configured to measure at least one transmit beam of the monitored first terminal.

[0630] In one embodiment, measuring at least one transmit beam of the first terminal is performed in at least one of the following situations:

[0631] The first information is sent by the first terminal using a beam scanning manner;

[0632] The first information is sent on at least one transmit beam of the first terminal;

[0633] The first information indicates that measurement is to be performed on at least one transmit beam of the first terminal;

[0634] The protocol stipulates that at least one transmit beam of the first terminal is measured;

[0635] The network instructs the first terminal to measure at least one transmit beam.

[0636] In one embodiment, the beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

[0637] In one embodiment, the beam measurement report includes at least one of the following:

[0638] a measurement result of at least one transmit beam of the second terminal;

[0639] identification information of a beam related to a measurement result of at least one transmit beam of the second terminal;

[0640] Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

[0641] In one embodiment, the beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following:

[0642] A beam with the best signal quality;

[0643] K beams with the best signal quality, where K is greater than 1;

[0644] N beams whose signal quality meets the threshold condition, where N is greater than 1;

[0645] The M beams with the best signal quality that meet the threshold condition, where M is greater than 1.

[0646] In one embodiment, the beam measurement report is carried through at least one of the following: PSFCH, PSCCH, PSSCH, and MAC CE.

[0647] In one embodiment, the beam-related information includes at least one of the following:

[0648] a beam for transmitting the first information that corresponds to at least one transmitting beam of the second terminal;

[0649] The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmitting beam of the second terminal.

[0650] In one embodiment, the measurement quantity of the beam measurement includes at least one of the following:

[0651] L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

[0652] In one implementation, the measurement variable is a network configuration, a protocol provision, or a configuration of the first terminal.

[0653] In one embodiment, the measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel, and measurement information;

[0654] The measurement signal includes a CSI-RS, the measurement channel includes at least one of a PSCCH, a PSSCH, and a PSFCH, and the measurement information includes at least one of an SCI and MAC CE information.

[0655] In one embodiment, the receiving unit 1210 is configured to perform at least one of the following:

[0656] Monitor each beam in a beam scanning manner on a sidelink to receive the first information on one or more receiving beams;

[0657] One beam or multiple beams are monitored simultaneously on a sidelink to receive the first information on one or more receive beams.

[0658] In one embodiment, the one or more receiving beams are determined based on at least one of: implementation of the second terminal, network configuration, a default beam, a correspondence with the transmitting beam of the second terminal, a correspondence with the transmitting beam of the first terminal, measurement results, and a receiving beam being used by the second terminal.

[0659] In one embodiment, the receiving unit is configured to perform at least one of the following:

[0660] monitoring a target receive beam of the first terminal on a sidelink to receive the first information;

[0661] Multiple beams are monitored simultaneously on a sidelink to receive the first information on one or more target receive beams of the second terminal.

[0662] In one embodiment, the target receiving beam of the second terminal is determined based on at least one of the following: a beam used to receive the first information, a received signal strength on the beam used to receive the first information, a beam corresponding to at least one transmitting beam of the first terminal to the second terminal, a beam corresponding to the target transmitting beam of the second terminal to the first terminal, and a beam corresponding to the time domain resources and / or frequency domain resources of the first information.

[0663] In one embodiment, the first receiving mode is a unidirectional receiving mode.

[0664] In one embodiment, the condition for receiving the first information in the first receiving mode includes at least one of the following:

[0665] The second terminal has determined a target receiving beam;

[0666] Receiving the first information by unicast;

[0667] The protocol stipulates / network configuration adopts a first receiving mode to receive the first information;

[0668] The upper layer instructs to use the first receiving mode to receive the first information;

[0669] The upper layer indicates that the receiving mode corresponding to the service, L2ID or configuration file associated with the first information is the first receiving mode.

[0670] In one implementation, the first receiving mode is an omnidirectional receiving mode.

[0671] In one embodiment, the condition for receiving the first information in the first receiving mode includes at least one of the following:

[0672] The second terminal fails to determine the target receiving beam;

[0673] Receiving the first information by multicasting or broadcasting;

[0674] The protocol stipulates / network configuration adopts a first receiving mode to receive the first information;

[0675] The upper layer instructs to use the first receiving mode to receive the first information;

[0676] The upper layer indicates that the receiving mode corresponding to the service, L2ID or configuration file associated with the first information is the first receiving mode.

[0677] In one embodiment, the period of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provision, and SLDRX.

[0678] In one embodiment, the receiving terminal matches at least one of the period, configuration, and pattern of the beam scanning mode of the transmitting terminal.

[0679] In one embodiment, the beam that the second terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the second terminal, and characteristics of the second terminal.

[0680] In one embodiment, as shown in FIG13 , the second terminal further includes: a first processing unit 1320 , configured to determine a target transmission beam based on the first information.

[0681] In one embodiment, the second terminal determines the target transmit beam based on at least one of the following conditions:

[0682] a correspondence between a beam for transmitting the first information and at least one transmitting beam of the second terminal;

[0683] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal;

[0684] One or more beam measurement reports included in the first information.

[0685] In one embodiment, the target transmission beam of the second terminal to the first terminal is selected from beams in a plurality of beam measurement reports, where the plurality of beam measurement reports are in the first information.

[0686] In one embodiment, the target transmission beam selected by the second terminal includes at least one of the following: a beam with the best signal quality in the measurement results; and a beam that meets a threshold condition in the measurement results.

[0687] In one embodiment, as shown in FIG13 , the second terminal further includes: a second processing unit 1330 , configured to determine at least one transmission beam of the first terminal to the second terminal based on the first information.

[0688] In one embodiment, the second terminal determines the at least one transmit beam of the first terminal to the second terminal based on at least one of the following conditions:

[0689] a correspondence between a beam for transmitting the first information and at least one transmitting beam of the second terminal;

[0690] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal;

[0691] a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the first terminal;

[0692] The first information is sent via a single beam.

[0693] In one implementation, the first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

[0694] In one embodiment, the PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

[0695] The second terminal of the embodiment of the present application can implement the corresponding functions of the second terminal in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the second terminal can be found in the corresponding descriptions in the above-mentioned method embodiments, which will not be repeated here. It should be noted that the functions described by the various modules (sub-modules, units or components, etc.) in the second terminal of the application embodiment can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0696] Figure 14 is a schematic structural diagram of a communication device 1400 according to an embodiment of the present application. The communication device 1400 includes a processor 1410, which can call and execute a computer program from a memory to enable the communication device 1400 to implement the method in the embodiment of the present application.

[0697] In one embodiment, the communication device 1400 may further include a memory 1420. The processor 1410 may call and execute a computer program from the memory 1420 to enable the communication device 1400 to implement the method in the embodiment of the present application.

[0698] The memory 1420 may be a separate device independent of the processor 1410 , or may be integrated into the processor 1410 .

[0699] In one embodiment, the communication device 1400 may further include a transceiver 1430 , and the processor 1410 may control the transceiver 1430 to communicate with other devices. Specifically, the transceiver 1430 may send information or data to other devices, or receive information or data sent by other devices.

[0700] The transceiver 1430 may include a transmitter and a receiver. The transceiver 1430 may further include an antenna, and the number of antennas may be one or more.

[0701] In one embodiment, the communication device 1400 may be the first terminal or the second terminal of the embodiment of the present application, and the communication device 1400 can implement the corresponding processes implemented by the first terminal or the second terminal in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0702] 15 is a schematic structural diagram of a chip 1500 according to an embodiment of the present application. The chip 1500 includes a processor 1510, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0703] In one embodiment, the chip 1500 may further include a memory 1520. The processor 1510 may call and execute a computer program from the memory 1520 to implement the method executed by the first terminal or the second terminal in the embodiment of the present application.

[0704] The memory 1520 may be a separate device independent of the processor 1510 , or may be integrated into the processor 1510 .

[0705] In one embodiment, the chip 1500 may further include an input interface 1530. The processor 1510 may control the input interface 1530 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0706] In one embodiment, the chip 1500 may further include an output interface 1540. The processor 1510 may control the output interface 1540 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0707] In one embodiment, the chip can be applied to the first terminal or the second terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first terminal or the second terminal in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0708] The chip used in the first terminal and the second terminal may be the same chip or different chips.

[0709] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0710] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0711] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0712] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0713] Figure 16 is a schematic block diagram of a communication system 1600 according to an embodiment of the present application. The communication system 1600 includes a first terminal 1610 and a second terminal 1620. The first terminal 1610 is configured to transmit first information on a sidelink using a first transmission method, where the first signaling indicates beam-related information. The second terminal 1620 is configured to receive the first information on a sidelink using a first reception method. The first terminal 1610 can be configured to implement the corresponding functions implemented by the first terminal in the above-mentioned method, and the second terminal 1620 can be configured to implement the corresponding functions implemented by the second terminal in the above-mentioned method. For the sake of brevity, these details will not be repeated here.

[0714] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, 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 in accordance with 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 devices. 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 a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0715] It should be understood that in the 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.

[0716] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0717] 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 modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A sideline communication method, comprising: The first terminal sends first information in a first sending manner on a sidelink, where the first information indicates beam-related information.

2. The method according to claim 1, wherein: The beam-related information includes information about the transmit beam of the first terminal.

3. The method according to claim 2, wherein: The information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

4. The method according to claim 3, wherein: The identification information of the transmitting beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

5. The method according to claim 3, wherein: The correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network.

6. The method according to any one of claims 1 to 5, wherein: The beam-related information includes a measurement configuration of a transmit beam of the first terminal.

7. The method according to claim 6, wherein: The measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement amount configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

8. The method according to any one of claims 1 to 7, wherein: The beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

9. The method according to claim 8, wherein: The beam measurement report includes at least one of the following: a measurement result of at least one transmit beam of the second terminal; identification information of a beam related to a measurement result of at least one transmit beam of the second terminal; Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

10. The method according to claim 9, wherein: The beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following: A beam with the best signal quality; K beams with the best signal quality, K is greater than 1; N beams whose signal quality meets the threshold condition, N is greater than 1; The M beams with the best signal quality whose signal quality meets the threshold condition, where M is greater than 1.

11. The method according to any one of claims 8 to 10, wherein: The beam measurement report is carried by at least one of the following: a physical sidelink feedback channel PSFCH, a physical sidelink control channel PSCCH, a physical sidelink shared channel PSSCH, and a MAC CE.

12. The method according to any one of claims 1 to 11, wherein: The beam-related information includes at least one of the following: a beam for sending the first information that corresponds to at least one sending beam of the second terminal; The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmission beam of the second terminal.

13. The method according to any one of claims 8 to 12, wherein: The method further comprises: The first terminal measures at least one transmit beam of the monitored second terminal.

14. The method according to claim 13, wherein: The beam that the first terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the first terminal, and characteristics of the first terminal.

15. The method according to any one of claims 6 to 14, wherein: The measurement quantity of beam measurement includes at least one of the following: Layer 1 L1-reference signal received power RSRP, L1-signal to interference and noise ratio SINR, layer 3 L3-RSRP, L3-SINR, L1-reference signal received quality RSRQ, L3-RSRQ.

16. The method according to claim 15, wherein: The measurement quantity is a network configuration, a protocol provision, or a configuration of the first terminal.

17. The method according to any one of claims 6 to 16, wherein: The measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel and measurement information; wherein the measurement signal includes a channel state information reference signal CSI-RS, the measurement channel includes at least one of PSCCH, PSSCH, and PSFCH, and the measurement information includes at least one of side control information SCI and MAC CE information.

18. The method according to any one of claims 1 to 17, wherein: The first terminal sends the first information in a first sending mode on the sidelink, including at least one of the following: The first terminal repeatedly sends the first information on each beam of the first terminal by using a beam scanning method on a side link; The first terminal uses multiple beams on the sidelink to simultaneously send the first information on each beam of the first terminal; The first terminal transmits the first information on each beam of the first terminal using one beam on a side link.

19. The method according to claim 18, wherein: The repeated transmission is periodic repeated transmission or repeated transmission based on available resources.

20. The method according to claim 18 or 19, wherein: The period and / or interval of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provisions and sidelink SL discontinuous reception DRX.

21. The method according to any one of claims 18 to 20, wherein: The first terminal uses a beam on the side link to send the first information on each beam of the first terminal, including at least one of the following: the first terminal sends the first information on the side link through a target transmission beam; the first terminal sends the first information on the side link through a default transmission beam.

22. The method according to any one of claims 1 to 21, wherein: The first sending mode is a unidirectional sending mode.

23. The method according to any one of claims 18 to 22, wherein: The condition for sending the first information in the first sending mode includes at least one of the following: The first terminal has determined a target transmit beam; Sending the first information by unicast; The protocol stipulates / network configuration adopts a first sending mode to send the first information; An upper layer instructs to use a first sending mode to send the first information; The upper layer indicates that the sending mode corresponding to the service, layer 2 identifier L2 ID or configuration file associated with the first information is the first sending mode.

24. The method according to any one of claims 1 to 23, wherein: The first sending mode is an omnidirectional sending mode.

25. The method according to claim 24, wherein: The condition for sending the first information in the first sending mode includes at least one of the following: The first terminal fails to determine the target transmit beam; Sending the first information by multicast or broadcast; The protocol stipulates / network configuration adopts a first sending mode to send the first information; An upper layer instructs to use a first sending mode to send the first information; The upper layer indicates that the sending mode corresponding to the service, L2 ID or configuration file associated with the first information is the first sending mode.

26. The method according to any one of claims 1 to 25, wherein: The first information is carried by at least one of SCI, neighbor communication fifth interface signaling PC5-S, neighbor communication fifth interface radio resource control PC5-RRC, and media access control control element MAC CE.

27. The method according to claim 26, wherein: The PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a direct communication request DCR message, a security mode control SMC message, an SMC-confirmation ACK message, and a direct communication acceptance DCA message.

28. A sideline communication method, comprising: The second terminal receives first information in a first receiving mode on a sidelink, where the first information indicates beam-related information.

29. The method according to claim 28, wherein: The beam-related information includes information about a transmit beam of the first terminal.

30. The method of claim 29, wherein: The information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

31. The method according to claim 30, wherein: The identification information of the transmitting beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

32. The method of claim 30, wherein: The correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network.

33. The method according to any one of claims 28 to 32, wherein: The beam-related information includes a measurement configuration of a transmit beam of the first terminal.

34. The method of claim 33, wherein: The measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement amount configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

35. The method according to claim 33 or 34, wherein: The method further comprises: The second terminal measures at least one monitored transmit beam of the first terminal.

36. The method of claim 35, wherein: Measuring at least one transmit beam of the first terminal in at least one of the following situations: The first information is sent by the first terminal in a beam scanning manner; The first information is sent on at least one transmit beam of the first terminal; The first information indicates that at least one transmit beam of the first terminal is measured; The protocol provides for measuring at least one transmit beam of the first terminal; The network instructs measurement of at least one transmit beam of the first terminal.

37. A method according to any one of claims 28 to 36, wherein: The beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

38. The method of claim 37, wherein: The beam measurement report includes at least one of the following: a measurement result of at least one transmit beam of the second terminal; identification information of a beam related to a measurement result of at least one transmit beam of the second terminal; Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

39. The method of claim 38, wherein: The beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following: A beam with the best signal quality; K beams with the best signal quality, K is greater than 1; N beams whose signal quality meets the threshold condition, N is greater than 1; The M beams with the best signal quality whose signal quality meets the threshold condition, where M is greater than 1.

40. The method according to any one of claims 37 to 39, wherein: The beam measurement report is carried by at least one of the following: PSFCH, PSCCH, PSSCH, MAC CE.

41. The method according to any one of claims 28 to 39, wherein: The beam-related information includes at least one of the following: a beam for sending the first information that corresponds to at least one sending beam of the second terminal; Time domain resources and / or frequency domain resources for sending the first information that correspond to at least one transmitting beam of the second terminal.

42. The method according to any one of claims 33 to 41, wherein: The measurement quantity of beam measurement includes at least one of the following: L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

43. The method of claim 42, wherein: The measurement quantity is a network configuration, a protocol provision, or a configuration of the first terminal.

44. The method according to any one of claims 33 to 43, wherein: The measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel and measurement information; wherein the measurement signal includes a CSI-RS, the measurement channel includes at least one of a PSCCH, a PSSCH and a PSFCH, and the measurement information includes at least one of SCI and MAC CE information.

45. A method according to any one of claims 28 to 44, wherein: The second terminal receiving the first information in the first receiving mode on the sidelink includes at least one of the following: The second terminal monitors each beam in a beam scanning manner on a side link to receive the first information on one or more receiving beams; The second terminal monitors one beam or multiple beams simultaneously on a side link to receive the first information on one or more receiving beams.

46. ​​The method of claim 45, wherein: The one or more receiving beams are determined based on at least one of: implementation of the second terminal, network configuration, a default beam, a correspondence with a transmitting beam of the second terminal, a correspondence with a transmitting beam of the first terminal, measurement results, and a receiving beam being used by the second terminal.

47. The method according to claim 45 or 46, wherein: The second terminal monitors one beam or multiple beams simultaneously on a side link to receive the first information on one or more receiving beams, including at least one of the following: The second terminal monitors a target receiving beam of the first terminal on a sidelink to receive the first information; The second terminal monitors a plurality of beams simultaneously on a sidelink to receive the first information on one or more target reception beams of the second terminal.

48. The method of claim 47, wherein: The target receiving beam of the second terminal is determined based on at least one of the following: a beam used to receive the first information, a received signal strength on the beam used to receive the first information, a beam corresponding to at least one transmitting beam of the first terminal to the second terminal, a beam corresponding to the target transmitting beam of the second terminal to the first terminal, and a beam corresponding to the time domain resources and / or frequency domain resources of the first information.

49. The method according to any one of claims 28 to 48, wherein: The first receiving mode is a one-way receiving mode.

50. The method according to any one of claims 45 to 49, wherein: The condition for receiving the first information in the first receiving mode includes at least one of the following: The second terminal has determined a target receiving beam; Receiving the first information by unicast; The protocol stipulates / network configuration adopts a first receiving mode to receive the first information; An upper layer instructs an upper layer to use a first receiving mode to receive the first information; The upper layer indicates that the receiving mode corresponding to the service, L2 ID or configuration file associated with the first information is the first receiving mode.

51. A method according to any one of claims 28 to 44, wherein: The first receiving mode is an omnidirectional receiving mode.

52. The method of claim 51, wherein: The condition for receiving the first information in the first receiving mode includes at least one of the following: The second terminal fails to determine the target receiving beam; Receiving the first information by multicast or broadcast; The protocol stipulates / network configuration adopts a first receiving mode to receive the first information; An upper layer instructs an upper layer to use a first receiving mode to receive the first information; The upper layer indicates that the receiving mode corresponding to the service, L2 ID or configuration file associated with the first information is the first receiving mode.

53. The method of claim 36, 45 or 46, wherein:The period of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provision and SL DRX.

54. The method of claim 36, 45, 46 or 53, wherein: The receiving terminal matches at least one of the period, configuration, and mode of the beam scanning method of the transmitting terminal.

55. The method according to any one of claims 35, 36, 45 to 48, wherein: The beam that the second terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the second terminal, and characteristics of the second terminal.

56. A method according to any one of claims 28 to 55, wherein: The method further comprises: The second terminal determines a target transmit beam based on the first information.

57. The method of claim 56, wherein: The second terminal determines the target transmission beam according to at least one of the following conditions: a correspondence between a beam for sending the first information and at least one sending beam of a second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal; One or more beam measurement reports included in the first information.

58. The method of claim 56 or 57, wherein: The target transmission beam of the second terminal to the first terminal is selected from beams in a plurality of beam measurement reports, and the plurality of beam measurement reports are in the first information.

59. The method of claim 58, wherein: The target transmission beam selected by the second terminal includes at least one of the following: a beam with the best signal quality in the measurement results; a beam that meets a threshold condition in the measurement results.

60. The method according to any one of claims 28 to 59, wherein: The method further comprises: The second terminal determines, based on the first information, at least one transmission beam of the first terminal to the second terminal.

61. The method of claim 60, wherein: The second terminal determines, by at least one of the following conditions, at least one transmission beam of the first terminal to the second terminal: a correspondence between a beam for sending the first information and at least one sending beam of the second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the first terminal; The first information is sent via a single beam.

62. The method according to any one of claims 28 to 61, wherein: The first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

63. The method of claim 62, wherein: The PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

64. A first terminal, comprising: A sending unit is used to send first information on a side link using a first sending method, where the first information indicates beam-related information.

65. The first terminal according to claim 64, wherein: The beam-related information includes information about the transmit beam of the first terminal.

66. The first terminal according to claim 65, wherein: The information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

67. The first terminal according to claim 66, wherein: The identification information of the transmitting beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

68. The first terminal according to claim 66, wherein: The correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network.

69. The first terminal according to any one of claims 64 to 68, wherein: The beam-related information includes a measurement configuration of a transmit beam of the first terminal.

70. The first terminal according to claim 69, wherein: The measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement amount configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

71. The first terminal according to any one of claims 64 to 70, wherein: The beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

72. The first terminal according to claim 71, wherein: The beam measurement report includes at least one of the following: a measurement result of at least one transmit beam of the second terminal; identification information of a beam related to a measurement result of at least one transmit beam of the second terminal; Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

73. The first terminal according to claim 72, wherein: The beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following: A beam with the best signal quality; K beams with the best signal quality, K is greater than 1; N beams whose signal quality meets the threshold condition, N is greater than 1; The M beams with the best signal quality whose signal quality meets the threshold condition, where M is greater than 1.

74. The first terminal according to any one of claims 71 to 73, wherein: The beam measurement report is carried by at least one of the following: PSFCH, PSCCH, PSSCH, MAC CE.

75. The first terminal according to any one of claims 64 to 74, wherein: The beam-related information includes at least one of the following: a beam for sending the first information that corresponds to at least one sending beam of the second terminal; The time domain resources and / or frequency domain resources for sending the first information correspond to at least one transmission beam of the second terminal.

76. The first terminal according to any one of claims 71 to 75, wherein: The first terminal further includes: The measuring unit is used to measure at least one transmit beam of the monitored second terminal.

77. The first terminal according to claim 76, wherein: The beam that the first terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the first terminal, and characteristics of the first terminal.

78. The first terminal according to any one of claims 69 to 77, wherein: The measurement quantity of beam measurement includes at least one of the following: L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

79. The first terminal according to claim 78, wherein: The measurement quantity is a network configuration, a protocol provision, or a configuration of the first terminal.

80. The first terminal according to any one of claims 69 to 79, wherein: The measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel and measurement information; wherein the measurement signal includes a CSI-RS, the measurement channel includes at least one of a PSCCH, a PSSCH and a PSFCH, and the measurement information includes at least one of SCI and MAC CE information.

81. The first terminal according to any one of claims 64 to 80, wherein: The sending unit is further used for at least one of the following: The first terminal repeatedly sends the first information on each beam of the first terminal by using a beam scanning method on a side link; The first terminal uses multiple beams on the sidelink to simultaneously send the first information on each beam of the first terminal; The first terminal transmits the first information on each beam of the first terminal using one beam on a side link.

82. The first terminal according to claim 81, wherein: The repeated transmission is periodic repeated transmission or repeated transmission based on available resources.

83. The first terminal according to claim 81 or 82, wherein: The period and / or interval of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provisions and SL DRX.

84. The first terminal according to any one of claims 81 to 83, wherein: The first terminal uses a beam on the side link to send the first information on each beam of the first terminal, including at least one of the following: the first terminal sends the first information on the side link through a target transmission beam; the first terminal sends the first information on the side link through a default transmission beam.

85. The first terminal according to any one of claims 64 to 84, wherein: The first sending mode is a unidirectional sending mode.

86. The first terminal according to any one of claims 81 to 85, wherein: The condition for sending the first information in the first sending mode includes at least one of the following: The first terminal has determined a target transmit beam; Sending the first information by unicast; The protocol stipulates / network configuration adopts a first sending mode to send the first information; An upper layer instructs to use a first sending mode to send the first information; The upper layer indicates that the sending mode corresponding to the service, L2 ID or configuration file associated with the first information is the first sending mode.

87. The first terminal according to any one of claims 64 to 86, wherein: The first sending mode is an omnidirectional sending mode.

88. The first terminal according to claim 87, wherein: The condition for sending the first information in the first sending mode includes at least one of the following: The first terminal fails to determine the target transmit beam; Sending the first information by multicast or broadcast; The protocol stipulates / network configuration adopts a first sending mode to send the first information; An upper layer instructs to use a first sending mode to send the first information; The upper layer indicates that the sending mode corresponding to the service, L2 ID or configuration file associated with the first information is the first sending mode.

89. The first terminal according to any one of claims 64 to 88, wherein: The first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

90. The first terminal according to claim 89, wherein: The PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

91. A second terminal, comprising: A receiving unit is used to receive first information using a first receiving mode on a side link, where the first information indicates beam-related information.

92. The second terminal according to claim 91, wherein: The beam-related information includes information about a transmit beam of the first terminal.

93. The second terminal according to claim 92, wherein: The information of the transmission beam of the first terminal includes at least one of the following: identification information of the transmission beam of the first terminal, and time domain resources and / or frequency domain resources corresponding to the transmission beam of the first terminal.

94. The second terminal according to claim 93, wherein: The identification information of the transmitting beam of the first terminal is dedicated to the first terminal, dedicated to the cell, or uniformly configured for the entire network.

95. The second terminal according to claim 93, wherein: The correspondence between the transmit beam of the first terminal and the time domain resources and / or frequency domain resources is specified by the protocol or configured by the network.

96. The second terminal according to any one of claims 91 to 95, wherein: The beam-related information includes a measurement configuration of a transmit beam of the first terminal.

97. The second terminal according to claim 96, wherein: The measurement configuration of the transmit beam of the first terminal includes: at least one of a measurement target configuration, a measurement amount configuration, a measurement threshold configuration, and a measurement report configuration of the transmit beam of the first terminal.

98. The second terminal according to claim 96 or 97, wherein: The second terminal further includes: A measuring unit is used to measure at least one transmit beam of the first terminal monitored.

99. The second terminal according to claim 98, wherein: Measuring at least one transmit beam of the first terminal in at least one of the following situations: The first information is sent by the first terminal in a beam scanning manner; The first information is sent on at least one transmit beam of the first terminal; The first information indicates that at least one transmit beam of the first terminal is measured; The protocol provides for measuring at least one transmit beam of the first terminal; The network instructs measurement of at least one transmit beam of the first terminal.

100. The second terminal according to any one of claims 91 to 99, wherein: The beam-related information includes a beam measurement report obtained by the first terminal measuring at least one transmit beam of the second terminal.

101. The second terminal according to claim 100, wherein: The beam measurement report includes at least one of the following: a measurement result of at least one transmit beam of the second terminal; identification information of a beam related to a measurement result of at least one transmit beam of the second terminal; Identification information of a beam selected based on a measurement result of at least one transmit beam of the second terminal.

102. The second terminal according to claim 101, wherein: The beam selected based on the measurement result of at least one transmit beam of the second terminal includes at least one of the following: A beam with the best signal quality; K beams with the best signal quality, K is greater than 1; N beams whose signal quality meets the threshold condition, N is greater than 1; The M beams with the best signal quality whose signal quality meets the threshold condition, where M is greater than 1.

103. The second terminal according to any one of claims 100 to 102, wherein: The beam measurement report is carried by at least one of the following: PSFCH, PSCCH, PSSCH, MAC CE.

104. The second terminal according to any one of claims 91 to 102, wherein: The beam-related information includes at least one of the following: a beam for sending the first information that corresponds to at least one sending beam of the second terminal; Time domain resources and / or frequency domain resources for sending the first information that correspond to at least one transmitting beam of the second terminal.

105. The second terminal according to any one of claims 96 to 104, wherein: The measurement quantity of beam measurement includes at least one of the following: L1-RSRP, L1-SINR, L3-RSRP, L3-SINR, L1-RSRQ, L3-RSRQ.

106. The second terminal according to claim 105, wherein: The measurement quantity is a network configuration, a protocol provision, or a configuration of the first terminal.

107. The second terminal according to any one of claims 96 to 106, wherein: The measurement target of the beam measurement includes at least one of a measurement signal, a measurement channel and measurement information; wherein the measurement signal includes a CSI-RS, the measurement channel includes at least one of a PSCCH, a PSSCH and a PSFCH, and the measurement information includes at least one of SCI and MAC CE information.

108. The second terminal according to any one of claims 91 to 107, wherein: The receiving unit is configured to perform at least one of the following: Monitor each beam in a beam scanning manner on a side link to receive the first information on one or more receiving beams; The first information is received on one or more receive beams by listening to one beam or multiple beams simultaneously on a sidelink.

109. The second terminal according to claim 108, wherein: The one or more receiving beams are determined based on at least one of: implementation of the second terminal, network configuration, a default beam, a correspondence with a transmitting beam of the second terminal, a correspondence with a transmitting beam of the first terminal, measurement results, and a receiving beam being used by the second terminal.

110. The second terminal according to claim 108 or 109, wherein: The receiving unit is configured to perform at least one of the following: Listening to a target receive beam of the first terminal on a sidelink to receive the first information; The plurality of beams are simultaneously monitored on a sidelink to receive the first information on one or more target receive beams of the second terminal.

111. The second terminal according to claim 110, wherein: The target receiving beam of the second terminal is determined based on at least one of the following: a beam used to receive the first information, a received signal strength on the beam used to receive the first information, a beam corresponding to at least one transmitting beam of the first terminal to the second terminal, a beam corresponding to the target transmitting beam of the second terminal to the first terminal, and a beam corresponding to the time domain resources and / or frequency domain resources of the first information.

112. The second terminal according to any one of claims 91 to 111, wherein: The first receiving mode is a one-way receiving mode.

113. The second terminal according to any one of claims 108 to 112, wherein: The condition for receiving the first information in the first receiving mode includes at least one of the following: The second terminal has determined a target receiving beam; Receiving the first information by unicast; The protocol stipulates / network configuration adopts a first receiving mode to receive the first information; An upper layer instructs an upper layer to use a first receiving mode to receive the first information; The upper layer indicates that the receiving mode corresponding to the service, L2 ID or configuration file associated with the first information is the first receiving mode.

114. The second terminal according to any one of claims 91 to 107, wherein: The first receiving mode is an omnidirectional receiving mode.

115. The second terminal according to claim 114, wherein: The condition for receiving the first information in the first receiving mode includes at least one of the following: The second terminal fails to determine the target receiving beam; Receiving the first information by multicast or broadcast; The protocol stipulates / network configuration adopts a first receiving mode to receive the first information; An upper layer instructs an upper layer to use a first receiving mode to receive the first information; The upper layer indicates that the receiving mode corresponding to the service, L2 ID or configuration file associated with the first information is the first receiving mode.

116. The second terminal according to claim 99, 108 or 109, wherein: The period of the beam scanning mode is determined based on one of the following: network configuration, pre-configuration, protocol provisions and SLDRX.

117. The second terminal according to claim 99, 108, 109 or 116, wherein: The receiving terminal matches at least one of the period, configuration, and mode of the beam scanning method of the transmitting terminal.

118. The second terminal according to any one of claims 98, 99, 108 to 111, wherein: The beam that the second terminal needs to monitor is determined based on at least one of the following: network configuration, pre-configuration, protocol provisions, capabilities of the second terminal, and characteristics of the second terminal.

119. The second terminal according to any one of claims 91 to 118, wherein: The second terminal further includes: The first processing unit is used to determine a target transmission beam based on the first information.

120. The second terminal according to claim 119, wherein: The second terminal determines the target transmission beam according to at least one of the following conditions: a correspondence between a beam for sending the first information and at least one sending beam of a second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal; One or more beam measurement reports included in the first information.

121. The second terminal according to claim 119 or 120, wherein: The target transmission beam of the second terminal to the first terminal is selected from beams in a plurality of beam measurement reports, and the plurality of beam measurement reports are in the first information.

122. The second terminal according to claim 121, wherein: The target transmission beam selected by the second terminal includes at least one of the following: a beam with the best signal quality in the measurement results; a beam that meets a threshold condition in the measurement results.

123. The second terminal according to any one of claims 91 to 122, wherein: The second terminal further includes: The second processing unit is used to determine at least one transmission beam of the first terminal to the second terminal based on the first information.

124. The second terminal according to claim 123, wherein: The second terminal determines, by at least one of the following conditions, at least one transmission beam of the first terminal to the second terminal: a correspondence between a beam for sending the first information and at least one sending beam of the second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the second terminal; a correspondence between time domain resources and / or frequency domain resources for sending the first information and at least one transmit beam of the first terminal; The first information is sent via a single beam.

125. The second terminal according to any one of claims 91 to 124, wherein: The first information is carried by at least one of SCI, PC5-S, PC5-RRC, and MAC CE.

126. The second terminal according to claim 125, wherein: The PC5-S includes at least one of a discovery message, a discovery request message, a discovery response message, a DCR message, an SMC message, an SMC-ACK message, and a DCA message.

127. A terminal device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory so that the terminal device executes the method as described in any one of claims 1 to 27 or 28 to 63.

128. A chip, comprising: A processor, configured to call and run a computer program from a memory so that a device equipped with the chip executes a method as described in any one of claims 1 to 27 or 28 to 63.

129. A computer-readable storage medium for storing a computer program, which, when executed by a device, causes the device to perform the method as claimed in any one of claims 1 to 27 or 28 to 63.

130. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 27 or 28 to 63.

131. A computer program causing a computer to perform the method of any one of claims 1 to 27 or 28 to 63.

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