WO2023241541A1 - Sidelink data transmission method and terminal - Google Patents

Abstract

The embodiments of the present application relate to the technical field of communications. Disclosed are a sidelink data transmission method and a terminal. The sidelink data transmission method in the embodiments of the present application comprises: a first terminal executing at least one of the following: determining a first beam; sending a first message to a third terminal, wherein the first beam is used for communicating in a first resource, the first resource is a sending resource of a second terminal, and the first message is used for indicating at least one of the following: non-recommended resources; recommended resources, in which a conflict occurs; and beam information; and confirming resources or beams indicated by means of the third terminal, and rejecting the resources or beams indicated by means of the third terminal.

Description

Sidelink data transmission method and terminal

cross reference

This application claims the priority of the Chinese patent application submitted to the China Patent Office on June 14, 2022, with the application number 202210669850.5 and the invention name "sidelink data transmission method and terminal". The entire content of this application is incorporated into the present invention by reference. middle.

Technical field

The present application belongs to the field of communication technology, and specifically relates to a sidelink data transmission method and terminal.

Background technique

The Long Term Evolution (LTE) system supports sidelink transmission, that is, data transmission between terminals (User Equipment, UE) directly on the physical layer. LTE sidelink communicates based on broadcast. Although it can be used to support basic security communications of vehicle to everything (V2X), it is not suitable for other more advanced V2X services. The 5G NR (New Radio) system supports more advanced sidelink transmission design, such as unicast, multicast or multicast, etc., thus supporting more comprehensive service types.

Due to the lack of low-frequency resources, 5G NR uses high-frequency bands such as millimeter waves. Since the propagation loss of high-frequency bands is greater than that of low-frequency bands, its coverage distance is worse than that of LTE. In order to solve this problem, one solution is to enhance the signal through multi-antenna beam forming (Beam Forming), thereby enhancing coverage. Beamforming is a signal processing technique that uses an array of sensors to send and receive signals in a direction. Beamforming technology adjusts the parameters of the basic units of the phase array so that signals at certain angles obtain constructive interference, while signals at other angles obtain destructive interference, so that the antenna beam points in a specific direction. The establishment of downlink beams is generally determined by synchronization signal/physical broadcast channel signal block/synchronization signal block (Synchronization Signal and PBCH block, SSB) and channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) reference signal.

Taking SSB as an example, because the beam is narrow, the same SSB is sent to different directions in the form of beams in NR according to Time Division Duplexing (TDD), so that terminals in all directions can receive it. SSB. In one example, within a 5ms range, the base station Multiple SSBs (corresponding to different SSB indexes) are sent to cover different directions respectively. The terminal receives multiple SSBs with different signal strengths and selects the strongest one as its own SSB beam.

When sidelink uses beamforming technology for communication, since the terminal may decide resources independently, the receiving end may need to receive data from multiple transmitting ends in a short period of time, which may be affected by the directional characteristics of the beam and the beam switching time. As a result, the receiving end cannot receive all data. Therefore, some research and design are needed so that the sending and receiving ends can try to avoid communication failure or even system performance degradation due to beam reception.

Contents of the invention

Embodiments of the present application provide a sidelink data transmission method and terminal, which can solve the problem of communication failure or even system performance degradation due to the use of beam reception in sidelink.

In a first aspect, a sidelink data transmission method is provided, including: the first terminal performs at least one of the following: determining a first beam; sending a first message to a third terminal; wherein the first beam is used in the first The first resource is the transmission resource of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirming the first The resources or beams indicated by the third terminal are rejected.

In a second aspect, a sidelink data transmission device is provided, applied to a first terminal, including at least one of the following: a processing module, used to determine the first beam; a sending module, used to send the first message to the third terminal; wherein , the first beam is used to communicate on a first resource, and the first resource is a transmission resource of the second terminal; the first message is used to indicate at least one of the following: non-recommended resources; recommended resources, Resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal.

In a third aspect, a terminal is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to determine a first beam, and the communication interface is used to send a first message to a third terminal; wherein the first The beam is used to communicate on the first resource, and the first resource is the transmission resource of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the third terminal. Three resources or beams indicated by the terminal.

In a fifth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented.

In a sixth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. A step of.

In a seventh aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the method described in the first aspect. Method steps.

In this embodiment of the present application, the first terminal performs at least one of the following: determining a first beam; sending a first message to the third terminal, the first beam is used for communication on a first resource, and the first resource is Transmission resources of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject all resources or beams indicated by the third terminal. The embodiments of the present application are beneficial to the first terminal's use of beams for sidelink data transmission and improve the performance of the communication system.

Description of the drawings

Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

Figure 2 is a schematic flow chart of a sidelink data transmission method according to an embodiment of the present application;

Figure 3 is a schematic structural diagram of a sidelink data transmission device according to an embodiment of the present application;

Figure 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Figure 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects Usually one type, The number of objects is not limited. For example, the first object may be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation

Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless device. access network unit. Access network equipment can include base stations, wireless Wireless Local Area Network (Wireless Local Area Network, WLAN) access point or Wireless Fidelity (Wireless Fidelity, WiFi) node, etc., the base station can be called Node B, Evolved Node B (eNB), access point, base transceiver station ( Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node, transmitting and receiving point ( Transmitting Receiving Point (TRP) or some other appropriate terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only in the NR system The base station is introduced as an example, and the specific type of base station is not limited.

The sidelink data transmission method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

As shown in Figure 2, this embodiment of the present application provides a sidelink data transmission method 200. The method can be executed by the first terminal. In other words, the method can be executed by software or hardware installed on the first terminal. The method includes the following step.

S202: The first terminal performs at least one of the following: determining a first beam; sending a first message to a third terminal; wherein the first beam is used for communication on a first resource, and the first resource is the second terminal Transmitting resources; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the third The resource or beam indicated by the terminal.

In various embodiments of the present application, the first terminal may be a terminal that receives sidelink data; the second terminal and the third terminal may be terminals that send sidelink data. Later, the sidelink data can be referred to as data, which is a general term and can include at least one of the following: control information, feedback information, target data (specific one or more data), reference signal, etc.

Various embodiments of the present application can be applied in the frequency range 2 (Frequency range 2, FR2) frequency band, in a scenario where one receiving end (i.e., the first terminal) faces multiple transmitting ends (i.e., the second terminal, the third terminal).

In this embodiment, the first terminal may determine a first beam, the first beam is used for communication on a first resource, and the first resource is a transmission resource of the second terminal. This embodiment facilitates the first terminal to communicate through the first beam and realize sidelink data transmission.

In this embodiment, the first terminal may determine the first beam in the following two situations:

In case 1, the first terminal selects one of the transmission beams indicated by multiple transmitting terminals (such as the second terminal, the third terminal, etc.). In this embodiment, the first terminal selects the beam indicated by the second terminal. In this embodiment, the first beam may be a receiving beam of the first terminal, a transmitting beam of the second terminal, or a pair of beams. In one example, the second terminal indicates a beam pair, which includes a transmit beam of the second terminal and a receive beam of the first terminal; in another example, the second terminal may indicate its own transmit beam, and the first terminal The corresponding receiving beam can be determined.

In case two, the first terminal chooses to communicate (including sending or receiving) on a certain resource (such as the first resource), and therefore determines the first beam. In this embodiment, the first terminal chooses to receive the data sent on the first resource instructed by the second terminal. Since the second terminal will also instruct the transmission beam, the first terminal chooses to receive the data of the second terminal, which is equivalent to determining First beam. In this embodiment, the first beam may be a transmitting beam of the second terminal, or may be a receiving beam of the first terminal. Optionally, the first terminal determining the first beam includes: the first terminal determining using the first beam for communication on the first resource.

In the case where the first terminal determines to use the first beam to receive data on the first resource, since it cannot simultaneously use beams other than the first beam to receive data from other terminals (ie, the third terminal), if the other terminals continue to use their Sending data using the beam you choose will result in a waste of resources and a decrease in system performance.

In order to avoid this situation, in this embodiment, the first terminal may also send a first message to the third terminal, where the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; Beam information: confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal.

Specifically, for example, the first message may indicate to the third terminal that the first resource is an unrecommended resource, preventing the third terminal from selecting the first resource to send data, so that the third terminal can avoid the first terminal using the first beam to receive data. Time; for another example, the first message may indicate to the third terminal that the first resource is a recommended resource, and the first terminal expects that the transmission resource selected by the third terminal is located within the time range of the first terminal using the first beam for data reception and the first The transmitting beams used by the three terminals can also be received by the first beam. In this way, the first terminal can use the first beam to receive data sent by multiple terminals; for another example, the first message can indicate the information of the first beam to the third terminal. , in this way, if the third terminal can switch to the transmission beam corresponding to the first beam that meets the reception requirements, it can use the switched transmission beam to send data to the first terminal. If the third terminal cannot switch to the transmission beam corresponding to the first beam, transmission beam, the third terminal can perform resource reselection and other operations; for another example, the first message includes a resource conflict indication, so that after receiving the conflict indication, the third terminal can adjust the transmission resources in advance through resource reselection and other methods to avoid Conflicts with the first resource; for another example, the first consumer The first message is used to confirm the resources and/or beams indicated by the third terminal; for another example, the first message is used to reject the resources and/or beams indicated by the third terminal.

Optionally, the first message may be carried on at least one of the following: sidelink control information (Sidelink Control Information, SCI), media access control control element (Media Access Control Control Element, MAC CE), physical side link Feedback channel (Physical Sidelink Feedback Channel, PSFCH), Radio Resource Control (Radio Resource Control, RRC) message, Physical Sidelink Shared Channel (Physical Sidelink Shared Channel, PSSCH).

It should be noted that determining the first beam by the first terminal and sending the first message to the third terminal can also be two independent actions. In other embodiments, the first terminal can also only determine the first beam; or, Only the first message is sent to the third terminal.

In the sidelink data transmission method provided by the embodiment of the present application, the first terminal performs at least one of the following: determining a first beam; sending a first message to the third terminal, where the first beam is used for communication on the first resource, and the The first resource is the transmission resource of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirming the resources indicated by the third terminal or Beam: reject the resource or beam indicated by the third terminal. The embodiments of the present application are beneficial to the first terminal's use of beams for sidelink data transmission and improve the performance of the communication system.

In the embodiment of this application, when facing multiple transmitters in the FR2 scenario, the first terminal sends a first message. The first message can be an instruction message or a cooperation message to avoid being unable to receive specific data due to the use of directional beams. Improve communication system performance by solving the problem of packet loss or system performance degradation caused by data from other terminals.

Optionally, based on the embodiment shown in Figure 2, the first terminal determining the first beam includes: the first terminal determines the first beam according to at least one of the following:

1) The time T when the first terminal expects to use one beam to receive data. For example, the time (or duration) T may be the shortest time that the first terminal expects to receive using one beam.

2) Data priority. For example, the selected first beam (beam) is the transmission beam, beam pair (beam pair) indicated by the terminal with the highest data priority (ie, the second terminal) to be sent to the first terminal, or the indicated beam pair. The receiving beam of , the first beam selected is the sending beam, receiving beam, and beam pair corresponding to the highest priority data that can be received by the first terminal within time T, Or the receiving beam corresponding to the beam pair; for another example, when considering receiving the Physical Sidelink Feedback Channel (PSFCH), the first beam selected is the beam with the highest priority corresponding to the PSFCH.

3) Reference Signal Receiving Power (RSRP). For example, the first beam selected is a transmit beam, a receive beam, and a beam pair whose RSRP is greater than a threshold (threshold).

4) The amount of data received by each beam. For example, the first beam selected can receive the most PSFCH, or receive the most Physical Sidelink Shared Channel (PSSCH), or receive the most Physical Sidelink Control Channel (PSCCH) .

5) Whether the time required to switch to the target beam meets the processing time. For example, from the current beams, a beam that satisfies the processing time is selected, and the processing time is the time required to switch to the target beam (that is, beams that cannot complete the switching are not selected). For example, the terminal selects a beam to receive at time T. When determining the receiving beam at time T+1, the processing time of beam switching needs to be considered.

6) Type of data. For example, select a beam that preferentially receives broadcasts, select a beam that only accepts negative acknowledgment (NACK only, NACK only) multicast, select a beam that requires or does not require Hybrid automatic repeat request (HARQ) feedback wait.

Optionally, based on the embodiment shown in Figure 2, the first beam may also be an omnidirectional beam. For example, if the first terminal can meet the reception requirements, such as RSRP requirements, when using omnidirectional beams, it can use omnidirectional beams to receive, thereby avoiding possible problems caused by using directional beams that can only receive data in certain directions. The problem.

Optionally, based on the embodiment shown in Figure 2, the first message satisfies at least one of the following:

1) The sending method of the first message is broadcast, multicast or unicast.

2) Indicated by a second beam that the second beam is different from the first beam. For example, the first terminal indicates through the second beam that the first resource is a non-preferred resource. This example can avoid the situation where the third terminal uses different beams to transmit data on the same resource (ie, the first resource), resulting in failure to receive data, and improves the performance of the communication system.

3) The first message is carried on terminal coordination information (Inter-UE Coordination, IUC).

4) The sending time of the first message is no later than time K, and the time K is determined by at least one of the following: the time when the first terminal switches to the first beam, the time when the first resource is located, The processing time of the first message, the time of resource location indicated by the third terminal, and the time of resource reselection. For example, because the first terminal sends the first message to the third terminal and expects the third terminal not to send data to itself on the first resource, it is required that the time when the first terminal sends the first message cannot be later than time K.

Optionally, the first message includes at least one of the following:

1) Indicate that the first resource is a non-recommended resource. For example, the first message carries time-frequency domain information of the first resource and/or an identifier indicating that the first resource is an unrecommended resource. This example can avoid the situation where the third terminal uses different beams to transmit data on the same resource (ie, the first resource), resulting in the first terminal being unable to receive part of the data, and improves the performance of the communication system.

2) Indicate that the resources (which may be the first resources) within the time period in which the first terminal expects to use the first beam for data reception are not recommended resources. For example, the first message carries time-frequency domain indication information of the resource set and/or an identifier indicating that the current resource set is a non-recommended resource. This example can avoid the situation where the third terminal uses different beams to transmit data on this resource set, resulting in the first terminal being unable to receive part of the data, and improves the performance of the communication system.

In various embodiments of the present application, the resources within the time period in which the first terminal expects to use the first beam for data reception may include the first resource, may also include resources other than the first resource, and may also include resources in the first resource. Some resources are not limited in the embodiments of this application.

This example can avoid the situation where the third terminal uses different beams to transmit data on the same resource, resulting in failure to receive data, and improves the performance of the communication system.

3) The time range for receiving using the first beam. For example, the first terminal informs other terminals of the time range to use the first beam for reception, and expects other terminals to either avoid this time range, or use the first beam or the transmission beam corresponding to the first beam to transmit within this time range, thus facilitating The first terminal receives the data.

4) The identification of the beam used by the first terminal to receive data. In this example, the first terminal can indicate the identity of the beam it will use (such as the identity of the first beam). If other terminals can adjust it, they will use the transmitting beam corresponding to this beam to transmit; if they cannot adjust, they will not transmit. transmission. In this embodiment, the identification of the beam may include at least one of the following: beam sequence number, corresponding reference signal identification, transmission configuration indicator (Transmission Configuration Indicator, TCI) state (state), quasi-co-location (Quasi-Co-Location, QCL) ) information, scrambling codes, etc.

5) The identification of the corresponding transmitting beam of the beam used by the first terminal to receive data.

6) The identifier (Identifier, ID) of the first terminal.

7) Confirmation information, the confirmation information indicates confirming the resources or beams indicated by the third terminal. For example, the first message carries a positive acknowledgment (ACK) feedback, confirming that the third terminal can use the indicated resource or beam to transmit data, indicating that the first terminal can receive data from the third terminal.

8) Rejection information, the rejection information indicates that the resources or beams indicated by the third terminal are rejected. For example, the first message carries NACK feedback, rejecting the information that the third terminal can use the indicated resources or beams to send data, indicating that the first terminal will not receive the data currently indicated by the third terminal.

Optionally, based on the embodiment shown in Figure 2, the first message is used to indicate at least one of the following:

1) Recommended resources, which include resources within a time period in which the first terminal expects to use the first beam for data reception. For example, the first message carries a resource set and/or an identifier, indicating that the resources in the indicated resource set are resources within the time period during which the first terminal expects to use the first beam for data reception, and it is expected that the third The third terminal can use these recommended resources to communicate with the first terminal.

2) The identification of the beam used by the first terminal to receive, for example, the identification of the first beam. Indicates that the first terminal decides to use the first beam or the receiving beam of the first beam for reception on the indicated resource.

3) The identification of the corresponding transmitting beam of the beam used by the first terminal to receive data.

In this embodiment, the sending method of the first message may be broadcast, multicast or unicast.

In this embodiment, the first terminal uses resource recommendation so that it can use one beam (ie, the first beam) to simultaneously or continuously receive resources sent by the second terminal and the third terminal, thereby improving resource utilization and improving communication system performance.

In this embodiment, the first message may be sent by the first terminal when a first condition is met, and the first condition includes at least one of the following:

1) The beams indicated by the second terminal and the third terminal are quasi-co-located.

2) The receiving beams corresponding to the beams indicated by the second terminal and the third terminal are quasi-co-located.

3) The transmission beam or beam pair indicated by the second terminal and the third terminal is the same.

4) The receiving beams corresponding to the transmitting beams indicated by the second terminal and the third terminal are the same.

5) The receiving beams corresponding to the beam pairs indicated by the second terminal and the third terminal are the same.

6) The first terminal uses the first beam to receive a measurement value of the transmission beam indicated by the third terminal that is greater than the first threshold. For example, when the first terminal uses the first beam to receive the measured value (RSRP) of the transmit beam indicated by the third terminal is greater than the first threshold, that is, even if it is not an optimal pairing, a beam that does not affect reception can be used.

7) The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal. For example, the transmission beams or beam pairs indicated by the second terminal and the third terminal are different, the resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal, and when the first terminal receives the data of the second terminal, In this case, when the first terminal has no time to perform beam switching and receives resources from the third terminal or resources with lower priority, it instructs the third terminal through the first message to switch the beam for transmission, for example, switch to the same beam as the second terminal. beam.

Optionally, based on various embodiments of the present application, the method further includes: the first terminal uses directional beam reception when a second condition is met; wherein the second condition includes at least one of the following: one:

1) The resource pool configured by the first terminal enables directional beam reception based on beam indication.

2) The RSRP of the first terminal for omnidirectional reception is less than the second threshold.

3) The priority of the data received by the first terminal is higher than the third threshold.

Optionally, based on the embodiment shown in Figure 2, the first message is used to indicate that the transmission resource of the third terminal conflicts with the first resource.

In this embodiment, the first message may be sent by the first terminal when a third condition is met, and the third condition includes at least one of the following:

1) The beams indicated by the second terminal and the third terminal are not quasi-co-located.

2) The corresponding beams of the beams indicated by the second terminal and the third terminal are not quasi-co-located.

3) The transmission beams or beam pairs indicated by the second terminal and the third terminal are different.

4) The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal.

5) The priority of the data sent by the third terminal is lower than the priority of the data sent by the second terminal.

In this embodiment, by sending a conflict indication, the first terminal expects the third terminal to perform resource reselection, etc., to prevent the first terminal from being unable to receive corresponding resources and affecting performance, thereby improving the performance of the communication system.

Optionally, based on the above embodiments of the present application, the first message may be used to trigger the third terminal to perform a first action, and the first action includes at least one of the following:

1) Resource reselection. That is, after receiving the first message, the third terminal avoids sending data on the first resource to the first terminal through resource reselection.

2) Select the beam again. That is, after receiving the first message, the third terminal selects a transmission beam that the first terminal can receive to send data to the first terminal.

3) Packet loss.

Optionally, the second terminal is determined by the first terminal according to at least one of the following:

1) Indicate the priority of data received by the first terminal. For example, the selected second terminal is the terminal with the highest priority of data sent to the first terminal.

2) Indicate the measurement value RSRP on the reception resource of the first terminal. For example, the selected second terminal is a terminal whose RSRP sent to the first terminal is greater than the threshold.

Optionally, the data mentioned in various embodiments of this application include at least one of the following: control information, feedback information, target data, and reference signals.

Optionally, in various embodiments of the present application, after the first terminal determines the first beam, the method further includes: the first terminal sends a second message to the second terminal, where the second message is a confirmation information.

Optionally, the second message may be carried on at least one of the following: SCI, MAC CE,

PSFCH, RRC, PSSCH.

Optionally, the second message satisfies at least one of the following: 1) the sending method of the second message is broadcast, multicast or unicast; 2) the sending time of the second message is no later than time T, The time T is determined by at least one of the following: the time when the first terminal switches to the first beam, the time when the first resource is located, and the processing time of the first message.

In order to explain in detail the sidelink data transmission method provided by the embodiment of this application, the following will be described with reference to a specific embodiment. In this embodiment, the receiving end coordinates the behavior of the sending end.

When terminal A (i.e., the first terminal) determines to use a directional beam (such as the first beam) to receive data at a certain time or within a certain period, it cannot use beams other than this beam to receive other terminals (such as the third terminal), if other terminals continue to use their own chosen beams to transmit data, it will cause a waste of resources and a decrease in system performance.

In order to avoid this situation, in this embodiment, the terminal can adopt the following methods (corresponding to the role of the first message mentioned above):

1. Send a message to other terminals to indicate that they do not expect to receive data at time K or within a period of time after time K. For example, when sending an IUC message to other terminals, the IUC message carries Non-preferred resources allow other terminals to avoid sending to themselves on these resources, regardless of whether they receive beam instructions.

2. Send the first beam information to other terminals to indicate which receiving beam you have determined. In this way, if other terminals have data to send at the corresponding time, they can only use the corresponding sending beam. If they cannot use the corresponding beam, they can Perform resource reselection and other operations regardless of whether beam instructions are received.

3. Send the second beam information to other terminals, that is, you can coordinate other terminals that want to send and let them use the beam indicated by terminal A to send data, which will help terminal A use the same beam to receive data. For example, if terminal A finds by receiving beam indication information that the beam selected by a terminal is not the transmit beam expected by terminal A, but is an adjacent or partially overlapping transmit beam, it can instruct the terminal to switch to the transmit beam desired by terminal A. .

4. Send resource recommendation information to the corresponding terminal. For example, when terminal A finds that the corresponding receiving beam of a beam indicated by the terminal is the receiving beam determined by terminal A, but the resource is not within the time range that terminal A expects to use the receiving beam for data reception, terminal A can send recommended resources to the receiving beam. The terminal enables the terminal to re-select the transmission resources to utilize the reception of terminal A.

5. After receiving beam instructions from multiple terminals and determining the receiving beam according to certain rules, terminal A sends conflict instructions to terminals that cannot receive the signals, so that these terminals can adjust their transmission resources in advance through resource reselection and other methods.

For the sidelink data transmission method provided by the embodiment of the present application, the execution subject may be a sidelink data transmission device. In the embodiment of the present application, the sidelink data transmission device performing the sidelink data transmission method is used as an example to illustrate the sidelink data transmission device provided by the embodiment of the present application.

Figure 3 is a schematic structural diagram of a sidelink data transmission device according to an embodiment of the present application. This device can be applied to the first terminal. As shown in Figure 3, the device 300 includes the following modules.

The processing module 302 is used to determine the first beam.

Sending module 304, configured to send a first message to a third terminal; wherein the first beam is used to communicate on a first resource, and the first resource is a sending resource of the second terminal; the first message is Instructing at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirming the resources or beams indicated by the third terminal, and rejecting the resources or beams indicated by the third terminal.

In the sidelink data transmission device provided by the embodiment of the present application, the processing module determines the first beam; the sending module sends the first message to the third terminal, and the first beam is used to communicate on the first resource, The first resource is a transmission resource of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; confirming the information indicated by the third terminal resources or beams, and reject the resources or beams indicated by the third terminal. The embodiments of the present application are beneficial to the first terminal's use of beams for sidelink data transmission and improve the performance of the communication system.

Optionally, as an embodiment, the processing module 302 is configured to determine the first beam according to at least one of the following: 1) the time T when the device expects to use one beam for data reception; 2) the priority of data level; 3) RSRP; 4) The amount of data received by each beam; 5) Whether the time required to switch to the target beam meets the processing time; 6) The type of data.

Optionally, as an embodiment, the first beam is an omnidirectional beam.

Optionally, as an embodiment, the first message satisfies at least one of the following: 1) the sending method of the first message is broadcast, multicast or unicast; 2) through the second beam indication, the first message The second beam is different from the first beam; 3) the first message is carried on the IUC; 4) the sending time of the first message is no later than time K, and the time K is determined by at least one of the following: The time when the device switches to the first beam, the time when the first resource is located, the processing time of the first message, the time when the resource is located indicated by the third terminal, and the time when resources are reselected. For example, the first terminal needs to send a first message to notify the third terminal that the reception cannot be performed. This requires that the time of sending the first message cannot be too late, so that the third terminal has no time to reselect resources, causing problems such as packet loss or invalid transmission. Therefore, the time for sending the first message needs to be earlier than the time when the resource is located indicated by the third terminal, taking into account the processing time reserved for the first message, the time for resource reselection, etc. If they are all indicated first resources, then they need to be earlier than the time of the first resource, plus the processing time of the first message and/or resource reselection time, etc.

Optionally, as an embodiment, the first message includes at least one of the following: 1) indicating that the first resource is an unrecommended resource; 2) indicating that the device desires to use the first beam for data reception The resources within the time period are not recommended resources; 3) the time range of using the first beam for reception; 4) the identification of the beam used by the device to receive data; 5) the identity of the beam used by the device to receive data The identification of the corresponding transmission beam; 6) the identification ID of the device; 7) confirmation information indicating confirmation of the resource or beam indicated by the third terminal; 8) rejection information indicating rejection of the The resource or beam indicated by the third terminal.

Optionally, as an embodiment, the first message is used to indicate at least one of the following: 1) Recommended resources, where the recommended resources include the device's desire to use the first beam for data access. resources within the time period of receiving data; 2) the identifier of the beam used by the device to receive data; 3) the identifier of the corresponding transmitting beam of the beam used by the device to receive data.

Optionally, as an embodiment, the first message is sent when a first condition is met, and the first condition includes at least one of the following: 1) the second terminal and the third terminal The indicated beams are quasi-co-located; 2) the receiving beams corresponding to the beams indicated by the second terminal and the third terminal are quasi-co-located; 3) the transmit beams indicated by the second terminal and the third terminal or The beam pairs are the same; 4) the receiving beams corresponding to the transmitting beams indicated by the second terminal and the third terminal are the same; 5) the receiving beams corresponding to the beam pairs indicated by the second terminal and the third terminal Same; 6) The device uses the first beam to receive the measurement value of the transmit beam indicated by the third terminal is greater than the first threshold; 7) The resources indicated by the third terminal are different from the resources indicated by the second terminal The time domain is continuous or the same.

Optionally, as an embodiment, the device further includes a receiving module, configured to use directional beam reception when a second condition is met; wherein the second condition includes at least one of the following: 1) The resource pool configured by the device enables directional beam reception based on beam indication; 2) the RSRP of omnidirectional reception by the device is less than the second threshold; 3) the priority of data received by the device is higher than the third threshold.

Optionally, as an embodiment, the first message is used to indicate that the transmission resource of the third terminal conflicts with the first resource. For example, the first terminal uses a terminal cooperation mechanism or HARQ feedback to send a first message to inform the third terminal that the transmission resource indicated by the first terminal conflicts with the resource determined by the first terminal to receive the second terminal, and the third terminal is expected to perform resource reselection and other operations. , to avoid invalid transmission or unnecessary interference.

Optionally, as an embodiment, the first message is sent when a third condition is met, and the third condition includes at least one of the following: 1) the second terminal and the third terminal The indicated beams are not quasi-co-located; 2) the corresponding beams of the beams indicated by the second terminal and the third terminal are not quasi-co-located; 3) the transmitting beams indicated by the second terminal and the third terminal or The beam pairs are different; 4) The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal; 5) The priority of the data sent by the third terminal is lower than that sent by the second terminal The priority of the data.

Optionally, as an embodiment, the first message is used to trigger the third terminal to perform a first action, and the first action includes at least one of the following: 1) resource reselection; 2) beam reselection; 3) Packet loss.

Optionally, as an embodiment, the first message is carried on at least one of the following: SCI, MAC CE, PSFCH, RRC, and PSSCH.

Optionally, as an embodiment, the second terminal is determined based on at least one of the following: 1) indicating the priority of data received by the device; 2) indicating the measurement value RSRP on the receiving resource of the device.

Optionally, as an embodiment, the data includes at least one of the following: control information, feedback information, target data, and reference signal.

Optionally, as an embodiment, the processing module 302 is configured to determine to use the first beam for communication on the first resource.

Optionally, as an embodiment, the sending module 304 is also configured to send a second message to the second terminal, where the second message is confirmation information.

Optionally, as an embodiment, the second message may be carried on at least one of the following: SCI, MAC CE, PSFCH, RRC, and PSSCH.

Optionally, as an embodiment, the second message satisfies at least one of the following: 1) the sending method of the second message is broadcast, multicast or unicast; 2) the sending time of the second message does not Later than time T, the time T is determined by at least one of the following: the time when the device switches to the first beam, the time when the first resource is located, and the processing time of the first message.

The device 300 according to the embodiment of the present application can refer to the process of the method 200 corresponding to the embodiment of the present application, and each unit/module and the above-mentioned other operations and/or functions in the device 300 are respectively to implement the corresponding process in the method 200, And can achieve the same or equivalent technical effects. For the sake of simplicity, they will not be described again here.

The sidelink data transmission device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The sidelink data transmission device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 2 and achieve the same technical effect. To avoid duplication, it will not be described again here.

Optionally, as shown in Figure 4, this embodiment of the present application also provides a communication device 400, which includes a processor 401 and a memory 402. The memory 402 stores programs or instructions that can be run on the processor 401, for example. , when the communication device 400 is a terminal, the program or instruction is processed by the processor 401 During execution, each step of the above sidelink data transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, details will not be described here.

An embodiment of the present application also provides a terminal, including a processor and a communication interface. The processor is used to determine a first beam, and the communication interface is used to send a first message to a third terminal; wherein the first beam is For communicating on a first resource, the first resource is a transmission resource of the second terminal; the first message is used to indicate at least one of the following: unrecommended resources; recommended resources, resource conflicts; beam information; Confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 5 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 500 includes but is not limited to: a radio frequency unit 501, a network module 502, an audio output unit 503, an input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, a processor 510, etc. At least some parts.

Those skilled in the art can understand that the terminal 500 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 510 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 5 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 504 may include a graphics processor (Graphics Processing Unit, GPU) 5041 and a microphone 5042. The graphics processor 5041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 506 may include a display panel 5061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 507 includes a touch panel 5071 and at least one of other input devices 5072 . Touch panel 5071, also called touch screen. The touch panel 5071 may include two parts: a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 501 can transmit it to the processor 510 for processing; in addition, the radio frequency unit 501 can send data to the network side device. Upstream data. Generally, the radio frequency unit 501 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 509 may be used to store software programs or instructions as well as various data. The memory 509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 509 may include volatile memory or non-volatile memory, or memory 509 may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory

(Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and Direct Rambus RAM (DRRAM). Memory 509 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 510 may include one or more processing units; optionally, the processor 510 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 510.

The radio frequency unit 501 may be used to send the first message to the third terminal.

The processor 510 may be used to determine the first beam; wherein the first beam is used to communicate on a first resource, and the first resource is a transmission resource of the second terminal; the first message is used to indicate the following At least one of: non-recommended resources; recommended resources, resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal.

The terminal provided by the embodiment of the present application can perform at least one of the following: determine the first beam; send the first message to the third terminal, the first beam is used for communication on the first resource, and the first resource is the second Transmitting resources of the terminal; the first message is used to indicate at least one of the following: not recommended Resources; recommended resources, resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal. The embodiment of the present application is beneficial to the sidelink data transmission by the first terminal using beams, improving the performance of the communication system. The terminal 500 provided by the embodiment of the present application can also implement each process of the above sidelink data transmission method embodiment, and can achieve the same technical effect. , to avoid repetition, will not be repeated here.

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above sidelink data transmission method embodiment is implemented, and can achieve The same technical effects are not repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above sidelink data transmission method embodiment. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above sidelink data transmission method. Each process in the example can achieve the same technical effect. To avoid repetition, we will not repeat it here.

Embodiments of the present application also provide a sidelink data transmission system, including: a terminal and a network-side device. The terminal can be used to perform the steps of the sidelink data transmission method as described above.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. executive functions, e.g. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims (36)

1. A sidelink data transmission method includes: the first terminal performs at least one of the following:

   Determine the first beam;

   Send the first message to the third terminal;

   Wherein, the first beam is used to communicate on a first resource, and the first resource is a transmission resource of the second terminal; the first message is used to indicate at least one of the following: non-recommended resources; recommended resources , resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal.
2. The method according to claim 1, wherein the first terminal determines the first beam comprising: the first terminal determines the first beam according to at least one of the following:

   The time T during which the first terminal expects to use one beam to receive data;

   Data priority;

   Reference signal received power RSRP;

   The amount of data received by each beam;

   Whether the time required to switch to the target beam meets the processing time;

   The type of data.
3. The method of claim 1, wherein the first beam is an omnidirectional beam.
4. The method according to claim 1, wherein the first message satisfies at least one of the following:

   The sending method of the first message is broadcast, multicast or unicast;

   Indicated by a second beam that the second beam is different from the first beam;

   The first message is carried on the terminal cooperation information IUC;

   The sending time of the first message is no later than time K, and the time K is determined by at least one of the following: the time when the first terminal switches to the first beam, the time when the first resource is located, the time The processing time of the first message, the time when the resource is located indicated by the third terminal, and the time when the resource is reselected.
5. The method of claim 1, wherein the first message includes at least one of the following:

   Indicate that the first resource is a non-recommended resource;

   Indicate that the resources within the time period in which the first terminal expects to use the first beam for data reception are not recommended resources;

   The time range for reception using the first beam;

   The identification of the beam used by the first terminal to receive data;

   The identification of the corresponding transmitting beam of the beam used by the first terminal to receive data;

   The identification ID of the first terminal;

   Confirmation information, the confirmation information indicating confirmation of the resources or beams indicated by the third terminal;

   Reject information indicating that the resources or beams indicated by the third terminal are rejected.
6. The method according to claim 1, wherein the first message is used to indicate at least one of the following:

   Recommended resources, the recommended resources include resources within the time period during which the first terminal expects to use the first beam for data reception;

   The identification of the beam used by the first terminal to receive;

   The identifier of the corresponding transmitting beam of the beam used by the first terminal to receive data.
7. The method according to claim 6, wherein the first message is sent by the first terminal when a first condition is met, and the first condition includes at least one of the following:

   The beams indicated by the second terminal and the third terminal are quasi-co-located;

   The receiving beams corresponding to the beams indicated by the second terminal and the third terminal are quasi-co-located;

   The transmission beam or beam pair indicated by the second terminal and the third terminal is the same;

   The receiving beams corresponding to the transmitting beams indicated by the second terminal and the third terminal are the same;

   The receiving beams corresponding to the beam pairs indicated by the second terminal and the third terminal are the same;

   The first terminal uses the first beam to receive a measurement value of the transmission beam indicated by the third terminal that is greater than a first threshold;

   The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal.
8. The method according to claim 1, wherein the method further includes: the first terminal uses directional beam reception when a second condition is met; wherein the second condition includes at least one of the following:

   The resource pool configured by the first terminal enables directional beam reception based on beam indication;

   The RSRP of the first terminal for omnidirectional reception is less than the second threshold;

   The priority of the data received by the first terminal is higher than the third threshold.
9. The method according to claim 1, wherein the first message is used to indicate that the transmission resource of the third terminal conflicts with the first resource.
10. The method according to claim 9, wherein the first message is sent by the first terminal when a third condition is met, and the third condition includes at least one of the following:

    The beams indicated by the second terminal and the third terminal are not quasi-co-located;

    The corresponding beams of the beams indicated by the second terminal and the third terminal are not quasi-co-located;

    The transmission beams or beam pairs indicated by the second terminal and the third terminal are different;

    The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal;

    The priority of the data sent by the third terminal is lower than the priority of the data sent by the second terminal.
11. The method according to claim 1, wherein the first message is used to trigger the third terminal to perform a first action, and the first action includes at least one of the following:

    Resource reselection;

    Reselect beam;

    Packet loss.
12. The method according to claim 1, wherein the first message is carried on at least one of the following: side link control information SCI, media access control control unit MAC CE, physical side link feedback channel PSFCH, radio resource control information RRC, physical side link data channel PSSCH.
13. The method according to claim 1, wherein the second terminal is determined by the first terminal according to at least one of the following:

    Indicate the priority of data received by the first terminal;

    Indicates the measurement value RSRP on the reception resource of the first terminal.
14. The method according to claim 1, 2, 5, 6, 8, 10 or 13, wherein the data includes at least one of the following: control information, feedback information, target data, and reference signal.
15. The method according to claim 1, wherein the first terminal determining the first beam includes:

    The first terminal determines to use the first beam for communication on the first resource.
16. The method according to claim 1, wherein after the first terminal determines the first beam, the method further includes: the first terminal sends a second message to the second terminal, wherein the second message is confirmation information. .
17. The method according to claim 16, wherein the second message is carried on at least one of the following: side link control information SCI, media access control control unit MAC CE, physical side link feedback channel PSFCH, radio resource control information RRC, physical side link data channel PSSCH.
18. The method according to claim 16, wherein the second message satisfies at least one of the following:

    The sending method of the second message is broadcast, multicast or unicast;

    The sending time of the second message is no later than time T, and the time T is determined by at least one of the following: the time when the first terminal switches to the first beam, the time when the first resource is located, the time The processing time of the first message.
19. A sidelink data transmission device includes at least one of the following:

    a processing module for determining the first beam;

    A sending module, used to send the first message to the third terminal;

    Wherein, the first beam is used to communicate on a first resource, and the first resource is a transmission resource of the second terminal; the first message is used to indicate at least one of the following: non-recommended resources; recommended resources , resource conflicts; beam information; confirm the resources or beams indicated by the third terminal, and reject the resources or beams indicated by the third terminal.
20. The device according to claim 19, wherein the processing module is configured to determine the first beam according to at least one of the following:

    The time T during which the device expects to use one beam for data reception;

    Data priority;

    Reference signal received power RSRP;

    The amount of data received by each beam;

    Whether the time required to switch to the target beam meets the processing time;

    The type of data.
21. The apparatus of claim 19, wherein the first beam is an omnidirectional beam.
22. The device according to claim 19, wherein the first message satisfies at least one of the following:

    The sending method of the first message is broadcast, multicast or unicast;

    Indicated by a second beam that the second beam is different from the first beam;

    The first message is carried on the IUC;

    The sending time of the first message is no later than time K, and the time K is determined by at least one of the following: the time when the device switches to the first beam, the time when the first resource is located, the time when the first The processing time of the message, the time when the resource is located indicated by the third terminal, and the time when the resource is reselected.
23. The device of claim 19, wherein the first message includes at least one of the following:

    Indicate that the first resource is a non-recommended resource;

    Indicates that the resource within the time period in which the device expects to use the first beam for data reception is Not recommended resources;

    The time range for reception using the first beam;

    The identification of the beam used by the device to receive data;

    The identification of the corresponding transmitting beam of the beam used by the device to receive data;

    The identification ID of the device;

    Confirmation information, the confirmation information indicating confirmation of the resources or beams indicated by the third terminal;

    Reject information indicating that the resources or beams indicated by the third terminal are rejected.
24. The device according to claim 19, wherein the first message is used to indicate at least one of the following:

    Recommended resources, the recommended resources include resources within a time period during which the device expects to use the first beam for data reception;

    The identification of the beam that the device is used to receive;

    The identifier of the corresponding transmitting beam of the beam used by the device to receive data.
25. The device according to claim 24, wherein the first message is sent when a first condition is met, and the first condition includes at least one of the following:

    The beams indicated by the second terminal and the third terminal are quasi-co-located;

    The receiving beams corresponding to the beams indicated by the second terminal and the third terminal are quasi-co-located;

    The transmission beam or beam pair indicated by the second terminal and the third terminal is the same;

    The receiving beams corresponding to the transmitting beams indicated by the second terminal and the third terminal are the same;

    The receiving beams corresponding to the beam pairs indicated by the second terminal and the third terminal are the same;

    The device uses the first beam to receive a measurement value of the transmission beam indicated by the third terminal that is greater than a first threshold;

    The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal.
26. The device according to claim 19, wherein the device further includes a receiving module configured to use directional beam reception when a second condition is met; wherein the second condition includes at least one of the following:

    The resource pool configured by the device enables directional beam reception based on beam indication;

    The RSRP of the device for omnidirectional reception is less than the second threshold;

    The device receives data with a priority higher than a third threshold.
27. The apparatus according to claim 19, wherein the first message is used to indicate that the transmission resource of the third terminal conflicts with the first resource.
28. The device according to claim 27, wherein the first message is sent when a third condition is met, and the third condition includes at least one of the following:

    The beams indicated by the second terminal and the third terminal are not quasi-co-located;

    The corresponding beams of the beams indicated by the second terminal and the third terminal are not quasi-co-located;

    The transmission beams or beam pairs indicated by the second terminal and the third terminal are different;

    The resources indicated by the third terminal are continuous or the same in time domain as the resources indicated by the second terminal;

    The priority of the data sent by the third terminal is lower than the priority of the data sent by the second terminal.
29. The device according to claim 19, wherein the first message is used to trigger the third terminal to perform a first action, and the first action includes at least one of the following:

    Resource reselection;

    Reselect beam;

    Packet loss.
30. The device according to claim 19, wherein the first message is carried on at least one of the following: side link control information SCI, media access control control unit MAC CE, physical side link feedback channel PSFCH, radio resource control information RRC, physical side link data channel PSSCH.
31. The device according to claim 19, wherein the second terminal is determined according to at least one of the following:

    Indicate the priority of data received by the device;

    Indicates the measurement value RSRP on the device's receive resources.
32. The device according to claim 19, 20, 23, 24, 26, 29 or 31, wherein the data includes at least one of the following: control information, feedback information, target data, and reference signal.
33. The apparatus according to claim 19, wherein the processing module is configured to determine to use the first beam for communication on the first resource.
34. The device according to claim 19, wherein the sending module is further configured to send a second message to the second terminal, where the second message is confirmation information.
35. A terminal, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the programs or instructions are executed by the processor, the implementation of any one of claims 1 to 18 is achieved. steps of the method described.
36. A readable storage medium on which programs or instructions are stored. When the programs or instructions are executed by a processor, the steps of the method according to any one of claims 1 to 18 are implemented.