WO2021114043A1

WO2021114043A1 - Device-to-device communication method and communication apparatus

Info

Publication number: WO2021114043A1
Application number: PCT/CN2019/124093
Authority: WO
Inventors: 袁璞
Original assignee: 华为技术有限公司
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2021-06-17

Abstract

Provided is a device-to-device communication method. A first terminal device can use a correlation between resources and a first reference signal to determine a first resource corresponding to a target first reference signal, and send, on the determined first resource, acknowledgment information of at least some first reference signals to a second terminal device. In this way, the second terminal device can use the first resource to determine a first beam, so that the second terminal device can communicate with the first device by using the determined first beam. Exemplarily, the present application can be applied to the Internet of Vehicles, such as V2X, LTE-V, V2V, etc.

Description

Device-to-device communication method and communication device

Technical field

This application relates to the communication field, and more specifically, to a device-to-device communication method and communication device in the communication field.

Background technique

In new radio (NR), network equipment and terminal equipment need to perform beam pairing, and use the paired beams for communication. In NR, the terminal equipment and network equipment can use the random access process to perform beam pairing. There is no random access process in device to device (D2D). Therefore, how to perform beam pairing in D2D is an urgent problem to be solved.

Summary of the invention

The present application provides a device-to-device communication method and communication device, which can perform beam pairing in D2D, thereby facilitating communication.

In a first aspect, a device-to-device communication method is provided, including: a first terminal device receives at least part of a first reference signal among N first reference signals sent by a second terminal device, where N is a positive integer; The first terminal device determines the target first reference signal in the at least part of the first reference signal according to the quality of the reference signal; the first terminal device determines the first resource corresponding to the target first reference signal, the first The resource is used by the second terminal device to determine the first beam; the first terminal device sends the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource.

In the above technical solution, the first terminal device can use the corresponding relationship between the resource and the first reference signal to determine the first resource corresponding to the target first reference signal, and send at least part of the first resource to the second terminal device on the determined first resource. The confirmation information of the first reference signal, in this way, the second terminal device can use the first resource to determine the first beam, so that the second terminal device can use the determined first beam to communicate with the first device.

The resources mentioned in this application may be time domain resources, frequency domain resources or time-frequency resources.

Optionally, the first terminal device stores previous correspondences between multiple resources and the N first reference signals.

Optionally, the second terminal device stores the correspondence between the N beams for transmitting the N first reference signals and the multiple resources.

Optionally, the second terminal device may use the first beam to send data to the first terminal device.

Optionally, the second terminal device may use the first beam to send and receive data with the first terminal device.

Optionally, the channels of the second terminal device are reciprocal.

At least part of the first reference signal includes part or all of the N first reference signals.

In some possible implementation manners, the receiving, by the first terminal device, the N first reference signals sent by the second terminal device includes: the first terminal device receives the second terminal device in M beams through M beams. At least a part of the first reference signals among the N first reference signals transmitted through N beams in each transmission period in a transmission period, where the N beams correspond to the N first reference signals in a one-to-one correspondence, and the The M beams have a one-to-one correspondence with the M cycles, and M is a positive integer;

The method further includes: the first terminal device determining the beam receiving the target first reference signal among the M beams as the second beam.

Optionally, the first terminal device may use the second beam to send data to the second terminal device.

Optionally, the first terminal device may use the second beam to send and receive data with the second terminal device.

Optionally, the channels of the first terminal device are reciprocal.

In the above technical solution, the first terminal device receives the second terminal device through the M beams and sends the N first reference signals through the N beams in each transmission period in the M transmission cycles, and the first terminal device can transmit the N first reference signals according to the M beams. For the reception of the transmission period, the second beam is determined among the M beams, and at least part of the received first reference signal can also be used to determine the first resource for sending the confirmation information. The second terminal device can determine the first beam according to the first resource. In this way, beam pairing can be achieved. The first terminal device and the second terminal device use the paired first beam and the second beam to communicate, thereby facilitating D2D communication.

In some possible implementation manners, the receiving, by the first terminal device, at least part of the first reference signal among the N first reference signals sent by the second terminal device includes: the first terminal device receiving the second terminal device At least part of the first reference signals among the N first reference signals respectively sent by the device through the N beams in a sending period;

The method further includes: the first terminal device sequentially receives, through M beams, a second reference signal corresponding to the first beam that is sent by the second terminal device multiple times through the first beam;

The first terminal device determines the second beam among the M beams according to the signal quality of the second reference signal corresponding to the first beam.

In the above technical solution, the first terminal device can determine the second beam among the M beams based on the second reference signal received multiple times, and can also use at least part of the received first reference signal to determine the first terminal device to send the confirmation information. One resource, the second terminal device can determine the first beam according to the first resource, so that beam pairing can be realized. The first terminal device and the second terminal device use the paired first beam and the second beam to communicate, thereby facilitating D2D communication.

In some possible implementation manners, the N first reference signals are side link synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N first reference signals are S-SSB, the second reference signal is a reference signal BTRS for beam training.

In the above technical method, if the N first reference signals are S-SSB and the second reference signal is S-SSB, after two transmission periods, the first terminal device can determine the second beam, and the second The terminal device can determine the first beam. If the N first reference signals are S-SSB and the second reference signal is the reference signal BTRS for beam training, the first terminal device may determine the second beam after less than two transmission periods. The two terminal devices can determine the first beam so that the time for beam pairing can be reduced.

In some possible implementation manners, the first terminal device sending the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource includes: the first terminal device passes The second beam sends the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource.

In some possible implementation manners, the method further includes: the first terminal device receives, through the second beam, the configuration information sent by the second terminal device through the first beam, where the configuration information includes all The identifier assigned by the second terminal device to the first terminal device.

In some possible implementation manners, the method further includes: the first terminal device receives a temporary identifier sent by the second terminal device; the confirmation information includes the temporary identifier.

In the second aspect, a device-to-device communication method is provided, including:

The second terminal device sends N first reference signals to the first terminal device, where N is a positive integer;

The second terminal device receives, on the first resource, the confirmation information of at least part of the first reference signal among the N first reference signals sent by the first terminal device; The first beam corresponding to the first resource.

In some possible implementation manners, the second terminal device sending N first reference signals to the first terminal device includes:

The second terminal device transmits the N first reference signals to the first terminal device through N beams in each transmission period in the M transmission periods, and the N beams are related to the N first reference signals. The signals have a one-to-one correspondence, the M cycles correspond to the M beams of the first terminal device, and M is a positive integer.

The second terminal device sends the N first reference signals to the first terminal device through N beams in one transmission period, and the N beams correspond to the N first reference signals in a one-to-one correspondence;

The method also includes:

The second terminal device sends the second reference signal corresponding to the first beam multiple times to the first terminal device through the first beam.

In some possible implementation manners, before the second terminal device sends the second reference signal corresponding to the first beam to the first terminal device multiple times through the first beam, the method further includes:

The second terminal device uses a predefined second identifier to generate a second reference signal corresponding to the first beam, and the second identifier is related to an identifier for generating a first reference signal corresponding to the first beam.

In some possible implementation manners, the method further includes:

The second terminal device sends configuration information to the first terminal device through the first beam, where the configuration information includes an identifier assigned by the second terminal device to the first terminal device.

In some possible implementation manners, the method further includes:

Sending, by the second terminal device, a temporary identifier to the first terminal device;

The confirmation information includes the temporary identifier.

In a third aspect, a communication device is provided, and the device is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect. Specifically, the apparatus may include a module for executing the first aspect or the method in any possible implementation manner of the first aspect.

In a fourth aspect, a communication device is provided, and the device is configured to execute the foregoing second aspect or the method in any possible implementation manner of the second aspect. Specifically, the device may include a module for executing the second aspect or the method in any possible implementation manner of the second aspect.

In a fifth aspect, a communication device is provided. The communication device includes a processor coupled with a memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions stored in the memory, so that in the first aspect The method is executed.

For example, the processor is configured to execute a computer program or instruction stored in the memory, so that the communication device executes the method in the first aspect.

Optionally, the communication device includes one or more processors.

Optionally, the communication device may further include a memory coupled with the processor.

Optionally, the communication device may include one or more memories.

Optionally, the memory can be integrated with the processor or provided separately.

Optionally, the communication device may also include a transceiver.

In a sixth aspect, a communication device is provided. The communication device includes a processor, the processor is coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction stored in the memory, so that in the second aspect The method is executed.

For example, the processor is configured to execute a computer program or instruction stored in the memory, so that the communication device executes the method in the second aspect.

Optionally, the communication device includes one or more processors.

Optionally, the communication device may include one or more memories.

Optionally, the communication device may also include a transceiver.

In a seventh aspect, the present application provides a communication system, which includes the device provided in the third aspect and the device provided in the fourth aspect; or

The system includes the device provided in the fifth aspect and the device provided in the sixth aspect.

In an eighth aspect, a computer-readable storage medium is provided, on which a computer program (also referred to as an instruction or code) for implementing the method in the first aspect is stored.

For example, when the computer program is executed by a computer, the computer can execute the method in the first aspect. The computer may be a communication device.

In a ninth aspect, a computer-readable storage medium is provided, on which a computer program (also referred to as an instruction or code) for implementing the method in the first aspect or the second aspect is stored.

For example, when the computer program is executed by a computer, the computer can execute the method in the second aspect. The computer may be a communication device.

In a tenth aspect, this application provides a chip including a processor. The processor is used to read and execute the computer program stored in the memory to execute the method in the first aspect and any possible implementation manners thereof.

Optionally, the chip further includes a memory, and the memory and the processor are connected to the memory through a circuit or a wire.

Further optionally, the chip further includes a communication interface.

In an eleventh aspect, the present application provides a chip including a processor. The processor is used to read and execute the computer program stored in the memory to execute the method in the second aspect and any possible implementation manners thereof.

Further optionally, the chip further includes a communication interface.

In the twelfth aspect, the present application provides a computer program product, the computer program product includes a computer program (also referred to as instructions or code), when the computer program is executed by a computer, the computer realizes the method. The computer may be a communication device.

In the thirteenth aspect, the present application provides a computer program product, the computer program product includes a computer program (also referred to as instructions or code), when the computer program is executed by a computer, the computer realizes the second aspect method. The computer may be a communication device.

Description of the drawings

Fig. 1 is an architecture diagram of a communication system provided by an embodiment of the present application.

Fig. 2 is a schematic diagram of a device-to-device communication method provided by an embodiment of the present application.

Fig. 3 is a schematic diagram of an S-SSB provided by an embodiment of the present application.

Fig. 4 is a schematic diagram of another device-to-device communication method provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of sending and receiving reference signals provided by an embodiment of the present application.

Fig. 6 is a schematic diagram of another device-to-device communication method provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of another sending and receiving reference signal provided by an embodiment of the present application.

FIG. 8 is another schematic diagram of sending and receiving a first reference signal according to an embodiment of the present application.

FIG. 9 is a schematic block diagram of a communication device provided by an embodiment of the present application.

FIG. 10 is a schematic block diagram of another communication device provided by an embodiment of the present application.

FIG. 11 is a schematic block diagram of another communication device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of a scene of communication between devices. In the scenario shown in FIG. 1, the link through which the terminal device 121 sends data to the network device 110 is called uplink, and the link through which the terminal device 121 receives data from the network device 110 is called downlink. (downlink). The link for transmitting data between the terminal device 121 and the terminal device 122 is called a side link. Sidewalk links are generally used in scenarios where direct communication between devices such as vehicle to everything (V2X) or device to device (D2D) can be performed. V2X communication can be regarded as a special case of D2D communication.

New radio (NR) access technology is the current mainstream wireless communication technology. It can support V2X communication with lower latency and higher reliability in response to V2X service characteristics and new service requirements. V2X is the foundation and key technology for the realization of smart cars, autonomous driving, and smart transportation systems. V2X may include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), and so on. V2N communication is currently the most widely used form of Internet of Vehicles. Its main function is to connect vehicles to a cloud server through a mobile network and use the navigation, entertainment, and anti-theft functions provided by the cloud server. V2V communication can be used for information exchange and reminding between vehicles, and the most typical application is for anti-collision safety systems between vehicles. Through V2I communication, vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing. V2P communication can be used to warn pedestrians or non-motorized vehicles on the road.

The terminal equipment in the embodiments of the present application may refer to user equipment (UE), access terminal, subscriber unit, subscriber station (subscriber station, SS), mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication equipment, customer premise equipment (CPE), user agent, or user device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application is not limited thereto.

Network equipment can be used to connect the terminal to a radio access network (RAN). Therefore, a network device may sometimes be referred to as an access network device or an access network node. It is understandable that in systems using different wireless access technologies, the names of devices with base station functions may be different. For ease of description, the embodiments of the present application provide devices with wireless communication access functions for terminals collectively referred to as network devices. The network equipment may be, for example, an evolved node B (eNB) in long term evolution (LTE), or it may be a next-generation base station node in the fifth generation (5G) mobile communication system. next generation node base station, gNB). The network equipment can be a macro base station or a micro base station. The network device can also be a roadside device with wireless access function or a certain terminal. In the embodiments of the present application, devices that can implement the functions involved on the network device side in the embodiments of the present application are collectively referred to as network devices.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems or windows operating systems. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

It should be understood that there may be one or more network devices included in the communication system. A network device can send data or control signaling to one or more terminals. Multiple network devices can also send data or control signaling to one or more terminal devices at the same time.

In the communication process between the terminal device 121 and the network device 110, a random access process can be used to achieve beam pairing, but in the communication process between the terminal device 121 and the terminal device 122, since there is no random access process, how to perform beam pairing is urgently needed. solved problem.

The terms involved in this application are described in detail below:

1. Beam

The embodiment of the beam in the NR protocol can be a spatial domain filter, or a spatial filter or a spatial parameter. The beam used to transmit a signal can be called a transmission beam (Tx beam), it can be called a spatial domain transmission filter or a spatial transmission parameter; the beam used to receive a signal can be called To receive the beam (reception beam, Rx beam), it can be called a spatial domain receive filter or a spatial receive parameter (spatial RX parameter).

The transmitting beam may refer to the distribution of signal strength in different directions in space after a signal is transmitted through the antenna, and the receiving beam may refer to the signal strength distribution of the wireless signal received from the antenna in different directions in space.

In addition, the beam may be a wide beam, or a narrow beam, or other types of beams. The beam forming technology may be beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital/analog beamforming technology, etc.

Optionally, multiple beams having the same or similar communication characteristics are regarded as one beam. One or more antenna ports can be included in one beam, which are used to transmit data channels, control channels, and sounding signals. One or more antenna ports forming a beam can also be regarded as an antenna port set.

In beam measurement, one beam corresponds to one resource, so the resource index can be used to uniquely identify the beam corresponding to the resource.

2. Resources

In beam measurement, the resource index can be used to uniquely identify the beam corresponding to the resource. The resource can be a signal resource. Signals include but are not limited to sounding reference signal (SRS), demodulation reference signal (DMRS), channel state information reference signal (CSI-RS), cell-specific reference signal ( cell specific reference signal (CS-RS), UE specific reference signal (user equipment specific reference signal, US-RS), demodulation reference signal (demodulation reference signal, DMRS), and synchronization signal/physical broadcast channel block (synchronization system/ physical broadcast channel block, SS/PBCH block). Among them, the SS/PBCH block may be referred to as a synchronization signal block (synchronization signal block, SSB) for short.

It should be noted that with the continuous development of technology, the terminology of the embodiments of this application may change, but they are all within the protection scope of this application.

The following describes the device-to-device communication method 200 mentioned in the embodiment of the present application with reference to FIG. 2. As shown in FIG. 2, the method 200 includes:

S210: The second terminal device sends N first reference signals to the first terminal device, where N is a positive integer.

Correspondingly, the first terminal device tries to receive the N first reference signals sent by the second terminal device, and the first terminal device may receive at least part of the first reference signals among the N first reference signals. For example, the received first reference signal whose signal quality is greater than the signal threshold is at least part of the first reference signal.

Optionally, at least part of the first reference signals of the N first reference signals are used by the first terminal device to determine the second beam. For example, the first terminal device determines the beam with the best reference signal quality in receiving at least part of the first reference signal as the second beam.

Optionally, the first terminal device may use the second beam to receive the information sent by the second terminal device.

Optionally, the second beam is a beam used by the first terminal device and the second terminal device to transmit (including receiving and sending) data. At this time, the channel has reciprocity, and the first terminal device can use the determined second beam to send and receive data with the second terminal device.

Optionally, the first reference signal may be a sidelink-SSB (sidelink-SSB, S-SSB). The format of the S-SSB is shown in FIG. 3. The S-SSB consists of a sidelink physical broadcast channel (side-link). link physical broadcast shared channel, PSBCH), side-link primary synchronization signal (S-PSS), side-link secondary synchronization signal (S-SSS) and interval (GAP) composition.

S220: The first terminal device determines a target first reference signal in the at least part of the first reference signals according to the quality of the reference signal.

Optionally, the reference signal quality may be reference signal receiving power (RSRP) S220, which includes: the first terminal device determines the maximum RSRP of the at least part of the first reference signals as the target first reference signal . Optionally, the reference signal quality may be a signal to interference plus noise ratio (SINR). S220 includes: the first terminal device determines the maximum SINR in the at least part of the first reference signals as the target The first reference signal. S230: The first terminal device determines a first resource corresponding to the target first reference signal.

Specifically, the first terminal device stores the corresponding relationship between each first reference signal and the resource. After the first terminal device determines the target first reference signal, it can determine the first resource corresponding to the target first reference signal according to the corresponding relationship. .

S240: The first terminal device sends at least part of the confirmation information of the first reference signal to the second terminal device on the first resource.

Correspondingly, the second terminal device can receive the confirmation information on the first resource.

Optionally, the method 200 further includes: the second terminal device sends a temporary identity (temp identity) to the first terminal device, for example, the second terminal device sends the temporary identity to the first terminal device in a broadcast or unicast manner. In S240, the confirmation information that the first terminal device sends at least part of the first reference signal to the second terminal device on the first resource may include the temporary identifier received from the second terminal device.

S250: The second terminal device determines the first beam corresponding to the first resource.

Optionally, S250 includes: the second terminal device determines the target first reference signal corresponding to the first resource, and the second terminal device determines the first beam for transmitting the target first reference signal.

Specifically, the second terminal device may send N first reference signals through N beams, one beam corresponds to one first reference signal, and there is a corresponding relationship between the first reference signal and the resource, and the second terminal device may determine the first reference signal by the first resource. A terminal device receives the target first reference signal, and then determines that the beam for transmitting the target first reference signal is the first beam.

Optionally, the first beam may be a transmission beam for the second terminal device to send data to the first terminal device.

Optionally, the first beam may be a beam for transmitting (including sending and receiving) data between the second terminal device and the first terminal device. At this time, the channel has reciprocity, and the second terminal device can use the determined first beam to send and receive data with the first terminal device.

Therefore, in this embodiment of the present application, the first terminal device can use at least part of the received first reference signal to determine the second beam, and can also use at least part of the received first reference signal to determine the first resource for sending the confirmation information. The second terminal device can determine the first beam according to the first resource, so that beam pairing can be realized. The first terminal device and the second terminal device use the paired first beam and the second beam to communicate, thereby facilitating D2D communication.

The following describes the device-to-device communication method provided by the embodiments of the present application with reference to FIGS. 4-6.

The following describes the device-to-device communication method 400 mentioned in the embodiment of the present application with reference to FIG. 4. As shown in FIG. 4, the method 400 includes:

S410: The second terminal device sends a temporary identifier to the first terminal device. Exemplarily, the second terminal device may send the temporary identifier to the first terminal device in a broadcast or unicast manner.

Correspondingly, the first terminal device receives the temporary identifier sent by the second terminal device.

S420: The second terminal device transmits N first reference signals to the first terminal device through N beams (that is, beam scanning transmission) in each transmission period in the M transmission periods, the N beams and the N first reference signals One-to-one correspondence, M is a positive integer.

Correspondingly, the first terminal device receives at least a part of the first reference signals among the N first reference signals sent by the second terminal device through the N beams in each transmission cycle in the M transmission cycles through the M beams, and the first terminal equipment The M beams of the device correspond to M transmission periods one-to-one.

Specifically, the transmission method is shown in Fig. 5, the upper part is that the second terminal device uses N beams to send N first reference signals in each transmission period, and the lower part of the first terminal device uses one beam to receive the second terminal device. N first reference signals corresponding to N beams transmitted in one transmission period. There are a total of M transmission periods. In this way, the second terminal device transmits N first reference signals corresponding to N beams in each transmission period of M transmission periods, and the first terminal device uses M beams to receive N beams corresponding to N beams in turn. First reference signal

Optionally, the transmission period and the reception period may be the same.

Optionally, before S420, the method further includes: the second terminal device generates N first reference signals.

Specifically, the second terminal device may generate N first reference signals with N predefined IDs. For example, in multicast, N pre-defined multicast IDs can be used to generate N first reference signals. For another example, in unicast, N first reference signals may be generated by using predefined N unicast IDs.

It should be noted that the order of S410 and S420 is not limited, and S410 may be performed before or after S420, or at the same time.

S430: The first terminal device may determine, according to the quality of the reference signal, which of the M beams is used to receive the first reference signal with the best signal quality, and the first reference signal is also referred to as a target first reference signal.

S440: The first terminal device determines the beam that receives the first reference signal of the target among the M beams as the second beam.

In this way, the first terminal device can communicate with the second terminal device using the second beam.

S450: There is a corresponding resource for each first reference signal, and the first terminal device determines a first resource corresponding to the target first reference signal.

It should be noted that the order of S440 and S450 is not limited, and S440 can be performed before or after S450, or at the same time.

S460: The first terminal device sends at least part of the confirmation information of the first reference signal to the second terminal device on the first resource. The confirmation information includes the temporary identifier in S410.

Correspondingly, the second terminal device receives the confirmation information sent by the first terminal device on the first resource.

Optionally, if the channels are reciprocal, in S460, the first terminal device may use the second beam to send the confirmation information to the second terminal device on the first resource.

S470: The second terminal device determines the first beam according to the first resource.

Optionally, S470 includes: the second terminal device determines the target first reference signal corresponding to the first resource, and the second terminal device determines the first beam for transmitting the target first reference signal. The second terminal device can send N first reference signals through N beams, one beam corresponds to one first reference signal, and there is a corresponding relationship between the first reference signal and the resource, and the second terminal device can determine the first terminal device by the first resource After receiving the first reference signal of the target, it is determined that the beam for transmitting the first reference signal of the target is the first beam.

In this way, the second terminal device can use the first beam to communicate with the first terminal device.

S480: The second terminal device sends configuration information to the first terminal device through the determined first beam, where the configuration information includes an identity (ID) allocated by the second terminal device to the first terminal device, and the identity It can also be referred to as a fixed identification, and the identification can be the ID of the first terminal device or the link ID.

Correspondingly, the first terminal device may use the second beam to receive the configuration information sent by the second terminal device through the first beam.

Therefore, in the method 400, the second terminal device may send the first reference signal corresponding to the multiple beams to the first terminal device through multiple beams in multiple transmission periods, and the first terminal device determines the first reference signal with the best received signal quality. The reference signal is the target first reference signal, the beam receiving the target first reference signal is determined as the second beam of the first terminal device, and the corresponding relationship between the first reference signal and the resource is determined The first resource, so that confirmation information is sent on the first resource. After receiving the confirmation information on the first resource, the second terminal device determines the target first reference signal received by the first terminal device according to the correspondence between the resource and the reference signal , Thereby determining the beam that sends the target first reference signal as the first beam, so that the first terminal device can use the second beam to communicate with the first beam of the second terminal device, so that beam pairing can be realized, which is beneficial to D2D communication .

The following describes the device-to-device communication method 600 mentioned in the embodiment of the present application with reference to FIG. 6. As shown in FIG. 6, the method 600 includes:

S610: The second terminal device sends a temporary identifier to the first terminal device. Exemplarily, the second terminal device may send the temporary identifier to the first terminal device in a broadcast or unicast manner.

S620: The second terminal device sends N first reference signals to the first terminal device through N beams in one sending period, and the N beams correspond to the N first reference signals in a one-to-one correspondence.

Correspondingly, the first terminal device omnidirectionally receives at least a part of the first reference signals among the N first reference signals transmitted by the second terminal device through the N beams in one transmission period.

Optionally, the transmission period and the reception period may be the same.

It should be noted that the order of S610 and S620 is not limited, and S610 can be performed before or after S620, or at the same time.

S630: The first terminal device may determine, according to the quality of the reference signal, a first reference signal with the best signal quality among at least part of the received first reference signals as the target first reference signal.

S640: There is a corresponding resource for each first reference signal, and the first terminal device determines a first resource corresponding to the target first reference signal.

S650: The first terminal device sends at least part of the confirmation information of the first reference signal to the second terminal device on the first resource. The confirmation information includes the temporary identifier in S610.

Optionally, in S650, the first terminal device omnidirectionally sends at least part of the confirmation information of the first reference signal to the second terminal device on the first resource.

S660: The second terminal device determines the first beam according to the first resource.

Optionally, S660 includes: the second terminal device determines the target first reference signal corresponding to the first resource, and the second terminal device determines the first beam for transmitting the target first reference signal. The second terminal device can send N first reference signals through N beams, one beam corresponds to one first reference signal, and there is a corresponding relationship between the first reference signal and the resource, and the second terminal device can determine the first terminal device by the first resource After receiving the first reference signal of the target, it is determined that the beam for transmitting the first reference signal of the target is the first beam.

S670. The second terminal device sends configuration information to the first terminal device through the determined first beam, where the configuration information includes an identifier assigned by the second terminal device to the first terminal device. The identifier may also be referred to as a fixed Logo.

Correspondingly, the first terminal device may receive the configuration information sent by the second terminal device through the first beam through beam scanning.

S680: The second terminal device sends the second reference signal corresponding to the first beam multiple times through the first beam.

Correspondingly, the first terminal device receives the second reference signal sent by the second terminal device through the first beam multiple times through the M beams at a time.

Optionally, before S680, the method 600 further includes: generating a second reference signal corresponding to the first beam with a predefined second identifier, and the second identifier is a first reference signal corresponding to the generating of the first beam. The identification of the signal is related. That is to say, the reference signals corresponding to the same beam at different stages can be the same reference signal or different reference signals. If the corresponding reference signals at different stages are different, the identifiers of the different reference signals are generated and associated. This is convenient for the first The terminal device parses the reference signal.

S690. The first terminal device determines a second beam among the M beams according to the signal quality of the second reference signal.

That is, in S690, the first terminal device uses the M beams to receive the second reference signal M times respectively, and selects the primary beam with the best received signal quality to determine it as the second beam.

Optionally, the order of S670 and S680-S690 is not limited. If S670 is before S680-S690, in this case, the first terminal device beam scans to receive configuration information; if S670 is after S680-S690, in this case, the first terminal device can use the second beam determined in S690 Receive the configuration information in S670.

It should be noted that, in the method 600, optionally, both the first reference signal and the second reference signal may be S-SSB, as shown in FIG. 7. The sending process of S620 can be the first stage. The upper part is the second terminal device using N beams to send N first reference signals in one sending cycle, and the lower part of the first terminal device receives the second terminal omnidirectionally in one receiving cycle. N first reference signals corresponding to the N beams sent by the device in one transmission period. The sending process of S680 may be the second stage. In this way, after 2 transmission periods, the first terminal device can determine the second beam, and the second terminal device can determine the first beam. Compared with the method 400, the beam pairing time can be saved. In the method 400, M transmission periods are required. If M is greater than 2, the method 600 can greatly save the beam pairing time. Optionally, the first reference signal may be an S-SSB, and the second reference signal may be a reference signal for beam training (beam training RS, BTRS), where BTRS is a reference signal dedicated to beam training, and the generation of BTRS and The mapping method is similar to other reference signals, for example, it can be similar to CSI-RS. As shown in Figure 8, since BTRS can be sent M times in one or several time slots (several milliseconds), the transmission duration of BTRS is one or several time slots, and the transmission of S-SSB M times is usually several tens of milliseconds. Therefore, if the second reference signal is a BTRS, the beam pairing time can be shortened, thereby reducing the time delay.

Of course, in the embodiment of the present application, the second reference signal can also be other reference signals different from S-SSB and BTRS. As long as the transmission period of the second reference signal is less than the transmission period of the first reference signal, the beam pairing can be shortened. Time, the embodiment of this application does not limit this.

The above describes in detail the device-to-device communication method provided by the embodiment of the present application with reference to Figs. 2 to 8, and the following describes in detail the communication device provided by the embodiment of the present application with reference to Figs. 9-11.

FIG. 9 shows a schematic block diagram of a communication device 900 provided by an embodiment of the present application. The device 900 may correspond to the first terminal device described in the above method, or may correspond to the chip or component of the first terminal device, and the device Each module or unit in 900 may be used to execute each action or processing procedure performed by the first terminal device in the foregoing method. As shown in FIG. 9, the communication device 900 may include a transceiver unit 910 and a processing unit 920.

The transceiving unit 910 is configured to receive at least part of the first reference signal among the N first reference signals sent by the second terminal device, where N is a positive integer;

The processing unit 920 is configured to determine a target first reference signal in the at least part of the first reference signal according to the quality of the reference signal;

The processing unit 920 is further configured to determine a first resource corresponding to the target first reference signal, where the first resource is used by the second terminal device to determine a first beam;

The transceiving unit 910 is further configured to send confirmation information of the at least part of the first reference signal to the second terminal device on the first resource.

As an optional embodiment, the transceiving unit 910 is specifically configured to: receive, through M beams, the N first reference signals sent by the second terminal device through N beams in each of the M transmission periods. At least part of the first reference signal in the signal, the N beams correspond to the N first reference signals one-to-one, the M beams correspond to the M cycles one-to-one, and M is a positive integer;

The processing unit 920 is further configured to determine the beam receiving the target first reference signal among the M beams as the second beam.

As an optional embodiment, the transceiving unit 910 is specifically configured to: receive at least part of the first reference signals among the N first reference signals respectively sent by the second terminal device through N beams in a transmission period ；

The transceiving unit 910 is further configured to sequentially receive the second reference signal corresponding to the first beam sent by the second terminal device through the first beam multiple times through M beams;

The processing unit 920 is further configured to determine a second beam among the M beams according to the signal quality of the second reference signal corresponding to the first beam.

As an optional embodiment, the N first reference signals are side uplink synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N first reference signals are S-SSB. -SSB, the second reference signal is a reference signal BTRS for beam training.

As an optional embodiment, the transceiving unit 910 is specifically configured to: send the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource through the second beam.

As an optional embodiment, the transceiver unit 910 is further configured to: receive, through the second beam, the configuration information sent by the second terminal device through the first beam, where the configuration information includes the second terminal The identifier assigned by the device to the device.

As an optional embodiment, the transceiving unit 910 is further configured to: receive a temporary identifier sent by the second terminal device; the confirmation information includes the temporary identifier.

It should be understood that, for the specific process of each unit in the device 900 performing the above corresponding steps, please refer to the foregoing description in conjunction with the method embodiments of FIGS. 2 to 8, and for the sake of brevity, details are not repeated here.

FIG. 10 shows a schematic block diagram of a communication device 1000 provided by an embodiment of the present application. The device 1000 may correspond to the second terminal device described in the above method, or may correspond to the chip or component of the second terminal device, and the device 1000 Each module or unit in 1000 may be used to execute each action or processing procedure performed by the second terminal device in the foregoing method. As shown in FIG. 10, the communication device 1000 may include a transceiver unit 1010 and a processing unit 1020.

The transceiver unit 1010 is configured to send N first reference signals to the first terminal device, where N is a positive integer;

A processing unit 1020, configured to receive, on a first resource, confirmation information of at least part of the first reference signal among the N first reference signals sent by the first terminal device;

The processing unit 1020 is further configured to determine a first beam corresponding to the first resource.

As an optional embodiment, the transceiving unit 1010 is specifically configured to: transmit the N first reference signals to the first terminal device through N beams in each transmission period in M transmission periods, and the N One beam corresponds to the N first reference signals, the M period corresponds to the M beams of the first terminal device, and M is a positive integer.

As an optional embodiment, the transceiving unit 1010 is specifically configured to: send the N first reference signals to the first terminal device through N beams in a transmission period, and the N beams are connected to the The N first reference signals have a one-to-one correspondence; the transceiving unit 1010 is further configured to: send a second reference signal corresponding to the first beam to the first terminal device through the first beam multiple times.

As an optional embodiment, the processing unit 1020 is further configured to: before the second reference signal corresponding to the first beam is sent to the first terminal device multiple times through the first beam, use a pre- The defined second identifier generates a second reference signal corresponding to the first beam, and the second identifier is related to an identifier for generating a first reference signal corresponding to the first beam.

As an optional embodiment, the transceiving unit 1010 is further configured to send configuration information to the first terminal device through the first beam, and the configuration information includes the information allocated by the apparatus to the first terminal device. Logo.

As an optional embodiment, the transceiver unit 1010 is further configured to:

Sending a temporary identifier to the first terminal device;

The confirmation information includes the temporary identifier.

It should be understood that, for the specific process of each unit in the device 1000 performing the above corresponding steps, please refer to the foregoing description of the method embodiments in conjunction with FIGS. 2 to 8, and for the sake of brevity, details are not repeated here.

The apparatus 900 of each of the foregoing solutions has the function of implementing the corresponding steps performed by the first terminal device in the foregoing method, and the apparatus 1000 of each of the foregoing solutions has the function of implementing corresponding steps performed by the second terminal device of the foregoing method; the functions can be implemented by hardware, It can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the sending unit can be replaced by a transmitter, the receiving unit can be replaced by a receiver, and other units, such as a determining unit, can be replaced by a processor, and each method is executed separately. Transceiving operations and related processing operations in the embodiment.

In a specific implementation process, the processor can be used to perform, for example, but not limited to, baseband related processing, and the transceiver can be used to perform, for example, but not limited to, radio frequency transceiving. The above-mentioned devices may be respectively arranged on independent chips, or at least partly or fully arranged on the same chip. For example, the processor can be further divided into an analog baseband processor and a digital baseband processor. The analog baseband processor and the transceiver can be integrated on the same chip, and the digital baseband processor can be set on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) Integrated on the same chip. Such a chip may be called a system on chip (SOC). Whether each device is independently arranged on different chips or integrated on one or more chips often depends on the specific needs of product design. The embodiment of the present application does not limit the specific implementation form of the foregoing device.

It can be understood that the processor involved in the foregoing embodiments can execute program instructions through a hardware platform with a processor and a communication interface to implement the functions involved in any design of the foregoing embodiments of the present application, based on this As shown in FIG. 11, an embodiment of the present application provides a schematic block diagram of a communication device 1100. The communication device 1100 includes a processor 1110, a transceiver 1120, and a memory 1130. The processor 1110, the transceiver 1120, and the memory 1130 communicate with each other through an internal connection path. The memory 1130 is used to store instructions, and the processor 1110 is used to execute instructions stored in the memory 1130 to control the transceiver 1120 to send signals and / Or receive the signal.

In a possible implementation manner, if the communication apparatus 1100 is a first terminal device, the transceiver 1120 is configured to receive at least a part of the first reference signal among the N first reference signals sent by the second terminal device, and N is a positive integer The processor 1110 is configured to determine a target first reference signal in the at least part of the first reference signal according to the quality of the reference signal; the processor 1110 is also configured to determine a first resource corresponding to the target first reference signal, The first resource is used for the second terminal device to determine the first beam; the transceiver 1120 is also used for sending confirmation information of the at least part of the first reference signal to the second terminal device on the first resource .

In another possible implementation manner, if the apparatus 1200 is a second terminal device, the transceiver 1120 is configured to send N first reference signals to the first terminal device, and N is a positive integer; the processor 1110 is configured to The confirmation information of at least part of the first reference signal among the N first reference signals sent by the first terminal device is received on the resource; the processor 1110 is further configured to determine the first reference signal corresponding to the first resource. Beam.

It should be understood that the apparatus 900 in FIG. 9 and the apparatus 1000 in FIG. 10 in the embodiment of the present application may be implemented by the apparatus 1100 in FIG. 11, and may be used to execute the first terminal device and the second terminal device in the foregoing method embodiment. Corresponding steps and/or processes.

It is understandable that the methods, processes, operations or steps involved in the various designs described in the embodiments of this application can be implemented in a one-to-one correspondence manner through computer software, electronic hardware, or a combination of computer software and electronic hardware. Corresponding realization. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. For example, considering the good versatility, low cost, software and hardware decoupling, etc., they can be implemented by executing program instructions, for example , Considering system performance and reliability, etc., it can be realized by using a dedicated circuit. Ordinary technicians can use different methods to implement the described functions for each specific application, which is not limited here.

According to the method provided in the embodiments of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the method in the above embodiment . The various embodiments in this application can also be combined with each other.

According to the method provided in the embodiments of the present application, the present application also provides a computer-readable medium, the computer-readable interpretation stores a program code, and when the program code runs on a computer, the computer executes the method in the above-mentioned embodiment .

In the embodiments of the present application, it should be noted that the foregoing method embodiments in the embodiments of the present application may be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method embodiments may be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. There are many different types of RAM, such as 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, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random memory Take memory (direct rambus RAM, DR RAM).

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

The terms "first" and "second" appearing in this application are only used to distinguish different objects, and "first" and "second" themselves do not limit the actual order or function of the modified objects. Any embodiment or design solution described as "exemplary", "example", "for example", "optionally" or "in certain implementations" in this application should not be construed as being better than other implementations. Examples or design schemes are more preferred or more advantageous. Rather, these words are used to present related concepts in a concrete way.

Various messages/information/equipment/network elements/systems/devices/operations that may appear in this application have been assigned names. It is understandable that these specific names do not constitute a reference to related objects. Limited, the assigned name can be changed according to factors such as the scene, context, or usage habits. The understanding of the technical meaning of the technical terms in this application should be determined mainly from the functions and technical effects embodied/implemented in the technical solution .

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may 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 may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic disk), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A device-to-device communication method, characterized in that it includes:

The first terminal device receives at least part of the first reference signal among the N first reference signals sent by the second terminal device, where N is a positive integer;

Determining, by the first terminal device, a target first reference signal in the at least part of the first reference signal according to the quality of the reference signal;

Determining, by the first terminal device, a first resource corresponding to the target first reference signal, where the first resource is used by the second terminal device to determine a first beam;

The first terminal device sends the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource.
The communication method according to claim 1, wherein the first terminal device receiving at least part of the N first reference signals sent by the second terminal device comprises:

Receiving, by the first terminal device, through M beams, at least part of the first reference signals of the N first reference signals that the second terminal device sends through N beams in each transmission period in M transmission periods, The N beams have a one-to-one correspondence with the N first reference signals, the M beams have a one-to-one correspondence with the M cycles, and M is a positive integer;

The method also includes:

The first terminal device determines the beam receiving the target first reference signal among the M beams as the second beam.
The communication method according to claim 1, wherein the first terminal device receiving at least part of the first reference signal among the N first reference signals sent by the second terminal device comprises:

Receiving, by the first terminal device, at least part of the first reference signals among the N first reference signals respectively sent by the second terminal device through N beams in a transmission period;

The method also includes:

The first terminal device sequentially receives through M beams the second reference signal corresponding to the first beam that is sent by the second terminal device multiple times through the first beam;

The first terminal device determines the second beam among the M beams according to the signal quality of the second reference signal corresponding to the first beam.
The communication method according to claim 3, wherein the N first reference signals are side uplink synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N The first reference signal is an S-SSB, and the second reference signal is a reference signal BTRS for beam training.
The communication method according to any one of claims 2 to 4, wherein the first terminal device sends the at least part of the first reference signal to the second terminal device on the first resource Confirmation information, including:

Sending, by the first terminal device, the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource by using the second beam.
The communication method according to any one of claims 2 to 5, wherein the method further comprises:

The first terminal device receives the configuration information sent by the second terminal device via the first beam through the second beam, and the configuration information includes the configuration information allocated by the second terminal device to the first terminal device Logo.
The communication method according to any one of claims 1 to 6, wherein the method further comprises:

Receiving, by the first terminal device, a temporary identifier sent by the second terminal device;

The confirmation information includes the temporary identifier.
A device-to-device communication method, characterized in that it includes:

The second terminal device sends N first reference signals to the first terminal device, where N is a positive integer;

Receiving, by the second terminal device, on the first resource, the confirmation information of at least part of the first reference signal among the N first reference signals sent by the first terminal device;

The second terminal device determines the first beam corresponding to the first resource.
The communication method according to claim 8, wherein the second terminal device sending N first reference signals to the first terminal device comprises:

The second terminal device transmits the N first reference signals to the first terminal device through N beams in each transmission period in the M transmission periods, and the N beams are related to the N first reference signals. The signals have a one-to-one correspondence, the M cycles correspond to the M beams of the first terminal device, and M is a positive integer.
The communication method according to claim 8, wherein the second terminal device sending N first reference signals to the first terminal device comprises:

The second terminal device sends the N first reference signals to the first terminal device through N beams in one transmission period, and the N beams correspond to the N first reference signals in a one-to-one correspondence;

The method also includes:

The second terminal device sends the second reference signal corresponding to the first beam multiple times to the first terminal device through the first beam.
The communication method according to claim 10, wherein the N first reference signals are side uplink synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N The first reference signal is an S-SSB, and the second reference signal is a reference signal BTRS for beam training.
The communication method according to claim 10 or 11, wherein the second terminal device sends the second reference signal corresponding to the first beam multiple times to the first terminal device through the first beam Before, the method also includes:

The second terminal device uses a predefined second identifier to generate a second reference signal corresponding to the first beam, and the second identifier is related to an identifier for generating a first reference signal corresponding to the first beam.
The communication method according to any one of claims 8 to 12, wherein the method further comprises:

The second terminal device sends configuration information to the first terminal device through the first beam, where the configuration information includes an identifier assigned by the second terminal device to the first terminal device.
The communication method according to any one of claims 8 to 13, wherein the method further comprises:

Sending, by the second terminal device, a temporary identifier to the first terminal device;

The confirmation information includes the temporary identifier.
A communication device, characterized in that it comprises:

A transceiving unit, configured to receive at least part of the first reference signal among the N first reference signals sent by the second terminal device, where N is a positive integer;

A processing unit, configured to determine a target first reference signal in the at least part of the first reference signal according to the quality of the reference signal;

The processing unit is further configured to determine a first resource corresponding to the target first reference signal, where the first resource is used by the second terminal device to determine a first beam;

The transceiving unit is further configured to send confirmation information of the at least part of the first reference signal to the second terminal device on the first resource.
The communication device according to claim 15, wherein the transceiver unit is specifically configured to:

At least part of the first reference signals of the N first reference signals sent by the second terminal device through the N beams in each transmission period in the M transmission periods are received through M beams, and the N beams and The N first reference signals have a one-to-one correspondence, the M beams have a one-to-one correspondence with the M cycles, and M is a positive integer;

The processing unit is further configured to determine the beam that receives the target first reference signal among the M beams as the second beam.
The communication device according to claim 15, wherein the transceiver unit is specifically configured to:

Receiving at least part of the first reference signals of the N first reference signals respectively sent by the second terminal device through N beams in a sending period;

The transceiving unit is further configured to sequentially receive the second reference signal corresponding to the first beam sent by the second terminal device through the first beam multiple times through M beams;

The processing unit is further configured to determine a second beam among the M beams according to the signal quality of the second reference signal corresponding to the first beam.
The communication device according to claim 17, wherein the N first reference signals are side uplink synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N The first reference signal is an S-SSB, and the second reference signal is a reference signal BTRS for beam training.
The communication device according to any one of claims 16 to 18, wherein the transceiver unit is specifically configured to:

Sending the confirmation information of the at least part of the first reference signal to the second terminal device on the first resource by using the second beam.
The communication device according to any one of claims 16 to 19, wherein the transceiver unit is further configured to:

The configuration information sent by the second terminal device through the first beam is received through the second beam, where the configuration information includes an identifier assigned by the second terminal device to the apparatus.
The communication device according to any one of claims 15 to 20, wherein the transceiver unit is further configured to:

Receiving the temporary identifier sent by the second terminal device;

The confirmation information includes the temporary identifier.
A communication device, characterized in that it comprises:

The transceiver unit is configured to send N first reference signals to the first terminal device, where N is a positive integer;

A processing unit, configured to receive, on a first resource, confirmation information of at least a part of the first reference signal among the N first reference signals sent by the first terminal device;

The processing unit is further configured to determine a first beam corresponding to the first resource.
The communication device according to claim 22, wherein the transceiver unit is specifically configured to:

In the M transmission cycles, each transmission cycle sends the N first reference signals to the first terminal device through N beams, and the N beams correspond to the N first reference signals one-to-one, so The M cycles correspond to the M beams of the first terminal device one-to-one, and M is a positive integer.
The communication device according to claim 23, wherein the transceiver unit is specifically configured to:

Each sending the N first reference signals to the first terminal device through N beams in one sending period, where the N beams correspond to the N first reference signals in a one-to-one correspondence;

The transceiving unit is further configured to send a second reference signal corresponding to the first beam to the first terminal device multiple times through the first beam.
The communication device according to claim 24, wherein the N first reference signals are side uplink synchronization signal blocks S-SSB, and the second reference signals are S-SSB; or, the N The first reference signal is an S-SSB, and the second reference signal is a reference signal BTRS for beam training.
The communication device according to claim 24 or 25, wherein the processing unit is further configured to:

Before the second reference signal corresponding to the first beam is sent to the first terminal device through the first beam multiple times, a second reference corresponding to the first beam is generated by using a predefined second identifier Signal, the second identifier is related to an identifier for generating a first reference signal corresponding to the first beam.
The communication device according to any one of claims 22 to 26, wherein the transceiver unit is further configured to:

Sending configuration information to the first terminal device through the first beam, where the configuration information includes the identifier assigned by the apparatus to the first terminal device.
The communication device according to any one of claims 22 to 27, wherein the transceiver unit is further configured to:

Sending a temporary identifier to the first terminal device;

The confirmation information includes the temporary identifier.