A communication method and apparatus

Abstract

The embodiment of the application provides a kind of communication method and device, for determining the communication mode of cluster member and network equipment, it is related to wireless communication technical field.The method, first terminal device can receive the first information sent by second terminal device.The first terminal device can send the identification information of the second terminal device to network equipment, or the first terminal device can send the identification information and the first information to the network equipment.Wherein, second terminal device can be the member node of the cluster that the first terminal device is in.Based on the above scheme, the first terminal device can send the identification information of second terminal device, or the identification information of second terminal device and first information to network equipment, to determine that network equipment is communicated with second terminal device by the second beam selected by second terminal device, or network equipment is communicated with second terminal device by first terminal device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular to a communication method and device. BACKGROUND

[0002] In new radio (NR), due to the existence of multiple beams, a user equipment (UE) performs preliminary beam selection in a random access procedure. A network device configures an association parameter of a synchronization signal and PBCH block (SSB) and a physical random access channel (PRACH) for the UE. The UE can measure reference signal received power (RSRP) of multiple SSBs at each random access, and select an SSB according to the RSRP measurement result, and perform random access on a PRACH resource associated with the selected SSB.

[0003] In a clustered access scenario, since the cluster members do not directly perform uplink communication with the network device, the network device cannot know the SSB selected by the cluster members. Therefore, the network device is not clear about how to communicate with the cluster members. SUMMARY

[0004] The present application provides a communication method and device for determining a communication manner of a cluster member and a network device.

[0005] In a first aspect, a communication method is provided. The method can be executed by a first terminal device or a chip with similar functions of the first terminal device. The first terminal device can be a cluster head node. In the method, the first terminal device can receive first information sent by a second terminal device. The first information includes information indicating a second beam selected by the second terminal device. The first terminal device can send identification information of the second terminal device to a network device, or the first terminal device can send the identification information and the first information to the network device. The second terminal device can be a member node of a cluster in which the first terminal device is located.

[0006] Based on the above scheme, the first terminal device can send the identification information of the second terminal device, or the identification information of the second terminal device and the first information to the network device, so as to determine whether the network device communicates with the second terminal device through the second beam selected by the second terminal device, or the network device communicates with the second terminal device through the first terminal device.

[0007] In a possible implementation, the first terminal device can determine, according to the second information, whether to send the identification information to the network device or to send the identification information and the first information to the network device. The second information can be information required to determine whether the first terminal device forwards downlink data sent by the network device to the second terminal device.

[0008] Based on the above scheme, the first terminal device can determine, according to the second information, whether to send the identification information to the network device or to send the identification information and the first information to the network device, thereby determining the communication mode of the network device and the second terminal device.

[0009] In a possible implementation, the first terminal device can send the second information to the network device. The first terminal device can receive the first indication information sent by the network device, and send the identification information to the network device or send the identification information and the first information to the network device.

[0010] Based on the above scheme, the network device can determine the communication mode of the second terminal device according to the second information, thereby sending the first indication information to the first terminal device, instructing the first terminal device to send the identification information to the network device, or instructing the first terminal device to send the identification information and the first information to the network device.

[0011] In a possible implementation, the first information can further include at least one of the following: a sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the second terminal device and the network device, or third information of the second terminal device; the third information can be used to indicate that the second terminal device expects to receive downlink data sent by the network device, or can be used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device.

[0012] Based on the above scheme, the second terminal device can send at least one of the above to the first terminal device, so that the first terminal device determines the communication mode between the second terminal device and the network device.

[0013] In a possible implementation, the second information can include at least one of the following: a sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the first terminal device and the network device, a downlink channel quality between the second terminal device and the network device, load information of the first terminal device, or third information.

[0014] Based on the above scheme, the first terminal device can determine the communication mode of the network device and the second terminal device by at least one of the above.

[0015] In a possible implementation, if the third information in the first information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the first terminal device sends the identification information of the second terminal device and the first information to the network device; if the third information in the first information is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device, the first terminal device sends the identification information to the network device.

[0016] Based on the above scheme, the second terminal device can send the expected communication mode with the network device to the first terminal device, and the first terminal device determines the communication mode of the second terminal device with the network device according to the expectation of the second terminal device.

[0017] In a possible implementation, the first terminal device can send the identification information to the network device through time-frequency resources associated with the second beam selected by the second terminal device.

[0018] Based on the above scheme, when the first terminal device determines that the network device and the second terminal device communicate through the second beam, the first terminal device can send the identification information to the network device through time-frequency resources associated with the second beam, which can save transmission resources.

[0019] In a possible implementation, the first terminal device can send second indication information to the second terminal device. The second indication information can be used to indicate that the downlink data of the second terminal device is sent by the network device, or can be used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device.

[0020] Based on the above scheme, the first terminal device can indicate the communication mode with the network device to the second terminal device through the second indication information, which can save the operation of the second terminal device when receiving downlink data.

[0021] In a second aspect, a communication method is provided. The method can be performed by a network device or a chip similar to the function of the network device. In the method, the network device can receive identification information of a second terminal device sent by a first terminal device. The network device can send downlink data of the second terminal device to the second terminal device through a second beam selected by the second terminal device, or the network device can send the downlink data of the second terminal device to the first terminal device through a first beam selected by the first terminal device. It should be noted that the first terminal device can be a cluster head node, and the second terminal device can be a member node of a cluster to which the first terminal device belongs.

[0022] In a possible implementation, the network device can transmit, according to the second information, the downlink data of the second terminal device to the second terminal device through a second beam selected by the second terminal device. Alternatively, the network device can transmit, according to the second information, the downlink data of the second terminal device to the first terminal device through a first beam selected by the first terminal device. The second information can be information required for determining whether the first terminal device forwards the downlink data of the second terminal device.

[0023] In a possible implementation, the second information can include at least one of the following: a sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the first terminal device and the network device, a downlink channel quality between the second terminal device and the network device, load information of the first terminal device, or third information, where the third information is used to indicate that the second terminal device expects to receive the downlink data transmitted by the network device, or is used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device.

[0024] In a possible implementation, if the third information is used to indicate that the second terminal device expects to receive the downlink data transmitted by the network device, the network device can transmit, to the second terminal device, the downlink data of the second terminal device through a second beam selected by the second terminal device. If the third information is used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device, the network device can transmit, to the first terminal device, the downlink data of the second terminal device through a first beam selected by the first terminal device.

[0025] In a possible implementation, the network device can receive information of the first beam sent by the first terminal device. The first beam can be a beam selected by the first terminal device. The network device can determine, according to the information of the first beam, whether to transmit, to the first terminal device, the downlink data of the second terminal device through the first beam selected by the first terminal device.

[0026] In a possible implementation, the network device can receive first information of the second terminal device sent by the first terminal device. The first information is used to indicate information of a second beam selected by the second terminal device. The network device can determine, according to the information of the second beam, whether to transmit, to the second terminal device, the downlink data of the second terminal device through the second beam selected by the second terminal device.

[0027] In a possible implementation, the second beam can be a beam determined according to a time-frequency resource in which the identification information is received.

[0028] In a third aspect, a communication method is provided. The method can be performed by a second terminal device or a chip similar to the function of the second terminal device. The second terminal device can be a member node of a cluster in which a first terminal device is located, and the first terminal device can be a cluster head node. In the method, the second terminal device can send first information to the first terminal device according to a measurement result of a beam of a network device. The first information can be used to indicate information of a second beam selected by the second terminal device. The second terminal device can receive data. The data can be downlink data sent by the network device, or the data can be downlink data from the network device forwarded by the first terminal device.

[0029] In a possible implementation, the second terminal device can receive second indication information. The second indication information can be used to indicate whether the first terminal device forwards downlink data of the second terminal device. The second terminal device can receive downlink data sent by the network device or receive downlink data from the network device forwarded by the first terminal device according to the second indication information.

[0030] In a possible implementation, the first information can include at least one of the following: a sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the second terminal device and the network device, or third information of the second terminal device. The third information can be used to indicate that the second terminal device expects to receive downlink data sent by the network device, or to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device.

[0031] In a possible implementation, if the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the second terminal device can receive the downlink data sent by the network device. If the third information is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device, the second terminal device can receive the downlink data forwarded by the first terminal device.

[0032] In a fourth aspect, a communication apparatus is provided. The communication apparatus can include various modules / circuits for performing the first aspect or any possible implementation of the first aspect, or can further include various modules / circuits for performing the second aspect or any possible implementation of the second aspect, or can further include various modules / circuits for performing the third aspect or any possible implementation of the third aspect. For example, a communication unit and a processing unit.

[0033] In a fifth aspect, a communication apparatus is provided, which comprises a processor and a memory. The memory is configured to store computer-executable instructions. When the computer-executable instructions are executed by the processor, the processor performs the operation steps of the method in the first aspect or any possible implementation manner of the first aspect, or performs the operation steps of the method in the second aspect or any possible implementation manner of the second aspect, or performs the operation steps of the method in the third aspect or any possible implementation manner of the third aspect.

[0034] In a sixth aspect, a computer-readable storage medium is provided, which stores instructions. When the instructions are executed on a computer, the computer performs the method in the above aspects.

[0035] In a seventh aspect, a computer program product storing instructions is provided. When the instructions are executed on a computer, the computer performs the method in the above aspects.

[0036] In addition, the beneficial effects of the second aspect to the seventh aspect can be as shown in the beneficial effects of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A communication system schematic diagram provided by an embodiment of the present application;

[0038] Figure 2 A communication system schematic diagram provided by an embodiment of the present application;

[0039] Figure 3 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0040] Figure 4 A schematic diagram of a second beam provided by an embodiment of the present application;

[0041] Figure 5 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0042] Figure 6 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0043] Figure 7 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0044] Figure 8 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0045] Figure 9 An exemplary flowchart of a communication method provided by an embodiment of the present application;

[0046] Figure 10 One of the schematic diagrams of the communication apparatus provided by the embodiments of the present application;

[0047] Figure 11 One of the schematic diagrams of the terminal device provided by the embodiments of the present application;

[0048] Figure 12 One of the schematic diagrams of the communication apparatus provided by the embodiments of the present application;

[0049] Figure 13 The block diagram of the communication apparatus provided by the embodiments of the present application. DETAILED DESCRIPTION

[0050] Hereinafter, some terms in the embodiments of the present application are explained to facilitate the understanding of the skilled in the art.

[0051] 1), cluster, a set composed of a plurality of terminal devices with an association relationship. For example, the association relationship between the terminal devices in the cluster can be that the configured control information retrieval resources are the same, the configured radio network temporary indicators (RNTI) are the same, the geographical positions are close, the owners are the same, the service types are the same, etc.

[0052] 2), cluster head node, a terminal device with the most critical position in the cluster, and its functions include but are not limited to forwarding the data sent by the base station to the cluster members, assisting the cluster members to send data to the base station, scheduling the data transmission of the cluster member terminals, configuring data transmission resources for the cluster member terminals, etc.

[0053] 3), cluster member node, a terminal device other than the cluster head node in the cluster.

[0054] 4) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" means two or more, and other quantifiers are similar. "And / or" describes the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, for the elements (element) appearing in the singular form "a", "an" and "the", unless the context clearly indicates otherwise, it does not mean "one or only one", but means "one or more than one". For example, "a device" means one or more such devices. Furthermore, "at least one of" means one or any combination of the subsequent associated objects, for example, "at least one of A, B and C" includes A, B, C, AB, AC, BC, or ABC.

[0055] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a long term evolution (LTE) system, a worldwide interoperability for microwave access (WiMAX) communication system, a future 5th generation (5G) system, such as a new radio access technology (NR), and a future communication system, such as a 6G system, and the like.

[0056] The present application will present various aspects, embodiments or features around a system that can include a plurality of devices, components, modules, and the like. It should be understood and appreciated that each system can include additional devices, components, modules, and the like, and / or can not include all of the devices, components, modules, and the like discussed in conjunction with the figures. Furthermore, a combination of these schemes can also be used.

[0057] The network architecture and service scenarios described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0058] The embodiments of the present application can be applied in traditional typical networks, and can also be applied in future UE-centric networks. The UE-centric network introduces a non-cell network architecture, that is, a large number of small stations are deployed in a certain area to form a hyper cell, each small station is a transmission point (TP) or transmission and reception point (TRP) of the hyper cell, and is connected with a centralized controller. When the UE moves in the hyper cell, the network side device selects a new sub-cluster for the UE to serve, thereby avoiding real cell switching and realizing the continuity of UE service. The network side device includes a radio network device. Alternatively, in the UE-centric network, multiple network side devices, such as small stations, can have independent controllers, such as distributed controllers, and each small station can independently schedule users. The small stations interact with each other in the long term, so that when providing collaborative services for the UE, there is also a certain flexibility.

[0059] The different base stations in the embodiments of the present application can be base stations with different identities, or can be base stations with the same identity deployed in different geographic locations. Since the base station does not know whether it will be involved in the scenario to which the embodiments of the present application are applied before the base station is deployed, the base station, or the baseband chip, should support the method provided by the embodiments of the present application before deployment. It can be understood that the aforementioned base stations with different identities can be base station identities, or can be cell identities or other identities.

[0060] Some scenarios in the embodiments of the present application are described by taking the scenario of the NR network in the wireless communication network as an example. It should be pointed out that the scheme in the embodiments of the present application can also be applied to other wireless communication networks, and the corresponding names can also be replaced by the names of corresponding functions in other wireless communication networks.

[0061] The technical scheme provided by the embodiments of the present application can be applied to wireless communication between communication devices. The wireless communication between communication devices can include wireless communication between network devices and terminal devices, wireless communication between network devices and network devices, and wireless communication between terminal devices and terminal devices. In the embodiments of the present application, the term "wireless communication" can also be referred to as "communication", and the term "communication" can also be described as "data transmission", "information transmission" or "transmission".

[0062] To facilitate understanding of the embodiments of the present application, first take Figure 1 The communication system shown is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. Figure 1 A schematic diagram of a communication system applicable to the communication method of the embodiments of the present application is shown. As Figure 1 shown, the communication system 100 includes a terminal device 101 and a terminal device 103. The terminal device 101 and the terminal device 103 can be configured with multiple antennas. Optionally, the communication system can also include a terminal device 105, which can also be configured with multiple antennas.

[0063] The terminal devices involved in this application include devices that provide voice and / or data connectivity to users. Specifically, they include devices that provide voice to users, devices that provide data connectivity to users, or devices that provide voice and data connectivity to users. For example, they may include handheld devices with wireless connection capabilities, or processing devices connected to wireless modems. The terminal can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal may include user equipment (UE), wireless terminal, mobile terminal, device-to-device (D2D) terminal, vehicle-to-everything (V2X) terminal, machine-to-machine / machine-type communications (M2M / MTC) terminal, Internet of Things (IoT) terminal, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user device, etc. For example, it may include a mobile phone (or so-called "cellular" phone), a computer with a mobile terminal, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. Also included are limited devices, such as those with low power consumption, limited storage capacity, or limited computing power. Examples include information sensing devices such as barcode scanners, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.

[0064] By way of example and not limitation, in embodiments of the present application, the terminal can also be a wearable device. The wearable device can also be referred to as a smart wearable device or a smart wearable device, etc., which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes, etc. The wearable device is a portable device that is directly worn on the body or integrated into the clothes or accessories of the user. The wearable device is not only a hardware device, but also a powerful function achieved through software support and data interaction, cloud interaction. The broad sense of wearable smart devices includes devices with full functions, large size, and the ability to realize complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and devices that focus on a certain application function and need to be used with other devices such as smart phones, such as various smart wristbands, smart helmets, smart jewelry, etc.

[0065] Various terminals as introduced above can be considered as vehicle-mounted terminals if they are located on a vehicle (for example, placed in or installed in a vehicle), for example, also referred to as on-board units (OBU).

[0066] In embodiments of the present application, the device for implementing the function of the terminal can be a terminal, or a device capable of supporting the terminal to implement the function, such as a chip system, which can be installed in the terminal. In embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the technical solutions provided in embodiments of the present application, the device for implementing the function of the terminal is taken as an example to describe the technical solutions provided in embodiments of the present application.

[0067] In embodiments of the present application, the terminal device 101, the terminal device 103, and the terminal device 105 can form a cluster, the terminal device 101 can be a cluster head node, and the terminal device 103 and the terminal device 105 can be cluster member nodes. In the communication system 100, the terminal device 101 can perform data transmission with the terminal device 103 and the terminal device 105. For example, the terminal device 101 can send data to the terminal device 103 and the terminal device 105, and the terminal device 103 and the terminal device 105 can also send data to the terminal device 101.

[0068] For example, Figure 2As shown, the communication system can further include a network device 102. The network device involved in the present application, for example, includes an access network (AN) device, such as a base station (for example, an access point), which can refer to a device in an access network that communicates with wireless terminals over the air through one or more cells, or for example, a network device in a vehicle-to-everything (V2X) technology is a road side unit (RSU). The base station can be used to convert the received air frames and IP packets into each other, as a router between the terminal and the rest of the access network, which can include an IP network. The RSU can be a fixed infrastructure entity supporting V2X applications, and can exchange messages with other entities supporting V2X applications. The network device can also coordinate the management of the properties of the air interface. For example, the network device can include an evolved base station (Node B or eNB or e-Node B, evolutional Node B) in a long term evolution (LTE) system or long term evolution-advanced (LTE-A), or can also include an evolved packet core network (EPC), a next generation node B (gNB) in a 5th generation (5G) or new radio (NR) system (also referred to as an NR system), or can also include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system, and the embodiments of the present application are not limited.

[0069] The network device can also include a core network device, for example, including an access and mobility management function (AMF) and the like.

[0070] In the embodiments of the present application, the device for implementing the function of the network device can be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0071] The network device 102 can send data to the terminal device 101, the terminal device 103 or the terminal device 105 in the cluster. When sending data, the network device 102 can send data to the cluster head node terminal device 101, and the cluster head node terminal device 101 forwards the data sent by the network device to the cluster member node terminal device 103 and the terminal device 105. Alternatively, when sending data, the network device 102 can send data to the terminal device 101, the terminal device 103 and the terminal device 105 respectively.

[0072] However, the cluster member nodes such as the terminal device 103 and the terminal device 105 do not communicate directly with the network device 102 in the random access process, but form a cluster with the terminal device 101 to realize communication with the network device 102. Therefore, the network device 102 cannot obtain the beam selected by the cluster member nodes such as the terminal device 103 and the terminal device 105, so that the network device 102 is not clear how to communicate with the cluster member nodes.

[0073] Based on the above problems, the embodiment of the present application provides a communication method. The communication method of the present application can be applied in a wireless communication system, for example, Figure 1 or Figure 2 The communication system shown. The communication system can include at least two terminal devices, or can also include at least one network device, and the terminal device and the terminal device can communicate through the wireless air interface, and the network device and the communication device can also communicate through the wireless air interface. For example, the terminal device can correspond to the terminal device 101, the terminal device 103 shown in Figure 1 or Figure 2 The network device can correspond to the network device 102 shown in Figure 2 .

[0074] As shown in Figure 3 , it is an exemplary flow chart of the communication method provided by the embodiment of the present application from the perspective of device interaction. The first terminal device can be a cluster head node, and the second terminal device can be a cluster member node of the cluster where the first terminal device is located. The method can include the following steps:

[0075] Step 301: The second terminal device sends first information to the first terminal device.

[0076] The second terminal device can send the first information to the first terminal device according to measurement results of beam reference signals of beams of the network device. The first terminal device and the second terminal device can measure beam reference signals sent by the network device respectively, where the beam reference signals are reference signals for beam management, and each beam reference signal corresponds to a beam from which the beam reference signal is sent. For example, the first terminal device and the second terminal device can measure synchronizing signal blocks (SSBs) sent by the network device respectively. The first terminal device and the second terminal device can measure one or more of reference signal received power (RSRP), reference signal received quality (RSRQ), or signal to interference plus noise ratio (SINR) of the beam reference signals. The measurement results of the beam reference signals of the beams can be one or more of the measured RSRP, RSRQ, and SINR, or can be a representation of the measured RSRP, RSRQ, and SINR. The first terminal device and the second terminal device can select beams from the beams sent by the network device according to the measurement results, the beam selected by the first terminal device can be referred to as a first beam, and the beam selected by the second terminal device can be referred to as a second beam. For example, the first terminal device and the second terminal device can select beams with RSRP measurement results greater than a specified threshold value respectively, or select beams with the largest RSRP respectively.

[0077] In an embodiment, the first information can comprise information of the second beam selected by the second terminal device. For example, the first information can comprise an SSB index of an SSB selected by the second terminal device, or indication information of the SSB index. The SSB index can be an index of the selected SSB in a set of all SSBs. For example, NR supports a maximum of 64 SSBs, and the first information can comprise an index of the SSB selected by the second terminal device in the 64 SSBs, or indication information of the index of the selected SSB in the 64 SSBs. Alternatively, the SSB index can also be an index in a set of maximum supportable SSBs in a current frequency range, or indication information of the index. For example, in frequency range (FR) 1 and when a carrier frequency is less than or equal to X, the maximum supportable number of SSBs is 4, and the first information can comprise an index of the SSB selected by the second terminal device in the 4 SSBs, or indication information of the index of the selected SSB in the 4 SSBs. For another example, in FR 1 and when the carrier frequency is greater than X, the maximum supportable number of SSBs is 8, and the first information can comprise an index of the SSB selected by the second terminal device in the 8 SSBs, or indication information of the index of the selected SSB in the 8 SSBs. For yet another example, in FR2, the maximum supportable number of SSBs is 64, and the first information can comprise an index of the SSB selected by the second terminal device in the 64 SSBs, or indication information of the index of the selected SSB in the 64 SSBs. Here, X can be an integer greater than 0. The SSB index can also be an index in a set of SSBs sent by the network device. For example, the network device can indicate a set of SSBs sent by signaling, the set of SSBs can comprise K SSBs, and the first information can comprise an index of the SSB selected by the second terminal device in the K SSBs, or indication information of the index of the selected SSB in the K SSBs. Here, K can be an integer greater than 0.

[0078] In another embodiment, the first information can also comprise a measurement result of a beam reference signal of the second beam selected by the second terminal device, or can comprise measurement results of beam reference signals of multiple beams selected by the second terminal device. The measurement result can be a quantized measurement result. For example, it can be identification information of a measurement result, and each identification information of a measurement result can correspond to a measurement result range. Alternatively, the maximum or minimum measurement result in the measurement results of the beam reference signals of the multiple beams comprised in the first information can be an absolute measurement result, and the measurement results of the beam reference signals of the remaining beams can be differences relative to the maximum or minimum measurement result.

[0079] In addition, it needs to be explained that if the network device directly sends downlink data to the second terminal device, at least one of a physical downlink shared channel (PDSCH) carrying the downlink data of the second terminal device and a physical downlink control channel (PDCCH) scheduling the aforementioned PDSCH and one or more beam reference signals of the second beam selected by the second terminal device can have the same quasi co-location (QCL) properties of the demodulation reference signal (DMRS) antenna port.

[0080] The downlink data of the second terminal device in the present application can be service data sent by the base station to the second terminal device, or downlink feedback sent by the base station to the second terminal device for uplink transmission or random access of the second terminal device.

[0081] Optionally, the first information can further include at least one of the following:

[0082] Item 1: The sidelink channel quality between the first terminal device and the second terminal device.

[0083] The sidelink channel quality here can be a representation of the measurement result of the sidelink channel by the second terminal device. For example, the second terminal device can measure the RSRP, RSRQ or SINR of the sidelink channel.

[0084] Item 2: The downlink channel quality between the second terminal device and the network device.

[0085] The downlink channel quality between the second terminal device and the network device can be a representation of the measurement result of the downlink channel by the second terminal device. For example, the second terminal device can measure the RSRP, RSRQ or SINR of the downlink channel.

[0086] Item 3: The third information of the second terminal device.

[0087] The third information here can be used to indicate that the second terminal device expects to receive the downlink data sent by the network device, or can be used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device. For example, if the second terminal device expects to communicate with the network device, the third information can be used to indicate that the second terminal device expects to receive the downlink data sent by the network device. If the second terminal device does not expect to communicate with the network device, the third information can be used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device.

[0088] The first information can be carried in a physical sidelink control channel (PSCCH) or can also be carried in a physical sidelink shared channel (PSSCH). The first information can be sent in the form of sidelink control information (SCI), or can also be sent in the form of a media access control (MAC) control element (CE), or can also be sent in the form of a radio resource control (RRC) message.

[0089] Step 302: The first terminal device sends the identification information of the second terminal device to the network device, or the first terminal device sends the identification information and the first information to the network device.

[0090] If the first terminal device forwards downlink data from the network device to the second terminal device, the first terminal device can send the identification information of the second terminal device to the network device, or the first terminal device can send uplink data of the second terminal device to the network device, and the uplink data can contain the identification information of the second terminal device. If the network device sends downlink data to the second terminal device, the first terminal device can send the identification information of the second terminal device and the aforementioned first information to the network device, or the first terminal device can send uplink data of the second terminal device and the first information to the network device, and the uplink data can contain the identification information of the second terminal device. The identification information of the second terminal device here can be sent by the second terminal device to the first terminal device. For example, the second terminal device can send its own identification information to the first terminal device when sending a random access request or uplink data to the first terminal device.

[0091] In addition, it should be noted that when the first terminal device sends the identification information of the second terminal device and the first information to the network device, it can be sent in the following two ways.

[0092] Method one: The first terminal device sends the identification information of the second terminal device and the first information to the network device.

[0093] The first information may include an identifier of the beam reference signal of the selected second beam reported by the second terminal device. Optionally, the first information may also include a measurement result of the beam reference signal of the second beam selected by the second terminal device. The first terminal device may carry the identification information and the first information in a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) and send them to the network device. Exemplarily, the first terminal device may send the first information and uplink data of the second terminal device to the network device, and the uplink data may carry the identification information of the second terminal device.

[0094] Method 2: The first terminal device sends identification information to the network device through the time-frequency resources associated with the second beam selected by the second terminal device. For example, the first terminal device can send the uplink data of the second terminal device to the network device through the time-frequency resources associated with the second beam, and the uplink data includes the identification information of the second terminal device.

[0095] (1) The first terminal device can send the identification information of the second terminal device and the first information to the network device through a two-step random access method. Figure 4 As shown, a part of the second terminal devices selects SSB1, and another part of the second terminal devices selects SSB2. Therefore, when the first terminal device performs random access through the physical random access channel (PRACH) and preamble associated with SSB1, the identification information of the second terminal device that selects SSB1 can be sent to the network device on the PUCCH or PUSCH associated with the PRACH and preamble. Among them, a PRACH and a preamble can be selected from the PRACH and preamble associated with SSB1, and the identification information of the second terminal device can be sent on the PUCCH or PUSCH associated with the PRACH and preamble. When the first terminal device performs random access through the PRACH and preamble associated with SSB2, the identification information of the second terminal device that selects SSB2 can be sent to the network device on the PUCCH or PUSCH associated with the PRACH and preamble. Among them, one PRACH and one preamble can be selected from the PRACH and preamble associated with SSB2, and the identification information of the second terminal device can be sent on the PUCCH or PUSCH associated with the one PRACH and one preamble.

[0096] (2) The first terminal device can send the identification information of the second terminal device and the first information to the network device in a four-step random access manner. As shown in Figure 4 part of the second terminal devices select SSB1, and the other part of the second terminal devices select SSB2. Therefore, the first terminal device can perform random access through the PRACH and preamble associated with SSB1. The first terminal device can send the identification information of the second terminal device selecting SSB1 to the network device on the time-frequency resource scheduled for the first terminal device in the random access response fed back by the network device. The first terminal device can perform random access through the PRACH and preamble associated with SSB2. And can send the identification information of the second terminal device selecting SSB2 to the network device on the time-frequency resource scheduled for the first terminal device in the random access response fed back by the network device.

[0097] (2) The first terminal device can send the identification information of the second terminal device and the first information to the network device in a four-step random access manner. As shown in Figure 4 part of the second terminal devices select SSB1, and the other part of the second terminal devices select SSB2. The first terminal device can send the identification information of the second terminal device selecting SSB1 to the network device through the PUSCH and DMRS associated with SSB1. Wherein, one PUSCH and one DMRS can be selected in the PUSCH and DMRS associated with SSB1. The first terminal device can send the identification information of the second terminal device selecting SSB2 to the network device through the PUSCH and DMRS associated with SSB2. Wherein, one PUSCH and one DMRS can be selected in the PUSCH and DMRS associated with SSB2. The preconfigured grant transmission refers to that the network device preconfigures time-frequency resources available for uplink transmission for the terminal device, and the terminal device uses the time-frequency resources when there is an uplink transmission demand, without the need for dynamic authorization by the network device, and can perform uplink transmission in a self-service manner.

[0098] It should be understood that the identification information of the second terminal device can be a unique identifier of the second terminal device, such as an international mobile equipment identity (IMEI), or an RNTI (Radio Network Temporary Identity), or a TMSI (Temporary Mobile Subscriber Identity), etc. Alternatively, the identification information can also be the identification information of the second terminal device in the cluster. After receiving the identification information of the second terminal device, the network device can determine the time-frequency resource receiving the identification information of the second terminal device, and further determine the second beam selected by the second terminal device. Based on the above scheme, the first terminal device can send the identification information of the second terminal device to the network device through the time-frequency resource associated with the second beam, which can save transmission resources.

[0099] Step 303: The network device sends the downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device; or the network device sends the downlink data of the second terminal device to the first terminal device through the first beam selected by the first terminal device.

[0100] If the downlink data of the second terminal device is forwarded by the first terminal device, the network device can send the downlink data of the second terminal device to the first terminal device through the first beam selected by the first terminal device. The downlink data can contain the identification information of the second terminal device. The first terminal device can send the downlink data to the corresponding second terminal device.

[0101] If the downlink data of the second terminal device is sent by the network device, the network device sends the downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device.

[0102] The foregoing introduces the communication method of the embodiments of the present application, and the following introduces the communication device of the embodiments of the present application. The method and the device are based on the same technical concept, and since the principles of the method and the device for solving problems are similar, the implementation of the device and the method can be mutually referred to, and the repeated parts will not be described herein.

[0103] In the embodiments of the present application, the communication mode between the cluster member node and the network device can be determined by the cluster head node (such as the first terminal device), the cluster member node (such as the second terminal device), or the network device. In other words, the cluster head node, the cluster member node, or the network device can determine whether the cluster member node receives the downlink data sent by the network device or receives the downlink data forwarded by the cluster head node. The following will introduce the above three cases respectively.

[0104] Embodiment 1: determining, by a cluster head node, a communication mode between a network device and a cluster member node.

[0105] The first terminal device can determine, according to the second information, whether to forward downlink data from the network device for the second terminal device. The second information here is information required to determine whether the first terminal device forwards downlink data from the network device for the second terminal device, and can include at least one of the following:

[0106] Item 1: a sidelink channel quality between the first terminal device and the second terminal device.

[0107] The sidelink channel quality here can be a characterization of a measurement result of a sidelink channel between the first terminal device and the second terminal device by the first terminal device, or can be a characterization of a measurement result of a sidelink channel between the first terminal device and the second terminal device sent by the second terminal device. The measurement result can be at least one of RSRP, RSRQ or SINR.

[0108] For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold value, the first terminal device can determine to forward downlink data from the network device for the second terminal device. Or, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold value, the first terminal device can determine not to forward downlink data from the network device for the second terminal device. The first threshold value and the second threshold value here can be determined according to empirical values, or can be preset, and the first threshold value and the second threshold value can be the same or different, which is not specifically limited by the present application.

[0109] Item 2: a downlink channel quality between the first terminal device and the network device.

[0110] The downlink channel quality here can be a characterization of a measurement result of a downlink channel between the first terminal device and the network device by the first terminal device. The measurement result can be at least one of RSRP, RSRQ or SINR.

[0111] For example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to a first threshold value, the first terminal device can determine to forward downlink data from the network device for the second terminal device. Or, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold value, the first terminal device can determine not to forward downlink data from the network device for the second terminal device. The first threshold value and the second threshold value here can be determined according to empirical values, and the first threshold value and the second threshold value can be the same or different, which is not specifically limited by the present application.

[0112] In one embodiment, the first terminal device can determine whether to forward the downlink data from the network device by the first terminal device according to the above-mentioned item 1 and item 2. For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to the first threshold, and the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold, it can be determined that the downlink data from the network device of the second terminal device is forwarded by the first terminal device.

[0113] Or, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold, and the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold, the first terminal device can determine not to forward the downlink data from the network device of the second terminal device, or the first terminal device can determine to forward the downlink data from the network device of the second terminal device.

[0114] Or, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to the first threshold, and the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold, the first terminal device can determine to forward the downlink data from the network device of the second terminal device, or the first terminal device can determine not to forward the downlink data from the network device of the second terminal device.

[0115] Or, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold, and the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold, the first terminal device can determine not to forward the downlink data from the network device of the second terminal device.

[0116] Item 3: The downlink channel quality between the second terminal device and the network device.

[0117] The downlink channel quality here can be a representation of a measurement result of the second terminal device to the downlink channel between the second terminal device and the network device sent by the second terminal device. The measurement result can be at least one of RSRP, RSRQ or SINR.

[0118] For example, the first terminal device can determine not to forward downlink data from the network device for the second terminal device if the downlink channel quality between the second terminal device and the network device is greater than or equal to a first threshold. The first terminal device can determine to forward downlink data from the network device for the second terminal device if the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold. The first threshold and the second threshold herein can be determined according to empirical values, and the first threshold and the second threshold can be the same or different, which is not limited in the present application.

[0119] In one embodiment, the first terminal device can determine whether to forward downlink data from the network device for the second terminal device according to at least one of the above-mentioned item 1, item 2 and item 3.

[0120] For example, the first terminal device can determine whether to forward downlink data from the network device for the second terminal device according to the above-mentioned item 1 and item 3. For example, the first terminal device can determine to forward downlink data from the network device for the second terminal device if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, and the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold. Alternatively, the first terminal device can determine not to forward downlink data from the network device for the second terminal device if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold. Alternatively, the first terminal device can determine whether to forward downlink data from the network device for the second terminal device if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to the first threshold, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold. Alternatively, the first terminal device can determine whether to forward downlink data from the network device for the second terminal device if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold.

[0121] The first terminal device can also determine whether to forward downlink data from the network device to the second terminal device according to the above-mentioned item 2 and item 3. For example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the second threshold value, the first terminal device can determine not to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is greater than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device.

[0122] The first terminal device can also determine whether to forward downlink data from the network device to the second terminal device according to the above-mentioned item 2 and item 3. For example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the second threshold value, the first terminal device can determine not to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is greater than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device. Alternatively, if the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device.

[0123] Item 4: Load information of the first terminal device.

[0124] The load information of the first terminal device can refer to the number of second terminal devices that the first terminal device needs to forward downlink data from the network device. If the load of the first terminal device is greater than or equal to a first threshold, the first terminal device can determine not to forward downlink data from the network device to the second terminal device. If the load of the first terminal device is less than or equal to a second threshold, the first terminal device can determine to forward downlink data from the network device to the second terminal device. The first threshold and the second threshold can be determined according to empirical values, and the first threshold and the second threshold can be the same or different, which is not limited in the present application.

[0125] In an embodiment, the first terminal device can determine whether to forward downlink data from the network device to the second terminal device according to at least one of the above-mentioned items 1-4. For example, the first terminal device can determine whether to forward downlink data from the network device to the second terminal device according to the sidelink channel quality between the first terminal device and the second terminal device, and the load information of the first terminal device. If the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, and the load of the first terminal device is less than or equal to a second threshold, the first terminal device can determine to forward downlink data from the network device to the second terminal device. Alternatively, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold, and the load of the first terminal device is greater than or equal to a first threshold, the first terminal device can determine not to forward downlink data from the network device to the second terminal device. If the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, and the load of the first terminal device is greater than or equal to a first threshold, the first terminal device can determine to forward downlink data from the network device to the second terminal device, or can determine not to forward downlink data from the network device to the second terminal device. If the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold, and the load of the first terminal device is less than or equal to a second threshold, the first terminal device can determine to forward downlink data from the network device to the second terminal device, or can determine not to forward downlink data from the network device to the second terminal device.

[0126] The first terminal device can determine whether to forward the downlink data from the network device to the second terminal device according to the above-mentioned item 2 and item 4. For example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold value, and the load of the first terminal device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device. If the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the load of the first terminal device is greater than or equal to the first threshold value, the first terminal device can determine not to forward the downlink data from the network device to the second terminal device. If the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold value, and the load of the first terminal device is greater than or equal to the first threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device. If the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold value, and the load of the first terminal device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device.

[0127] The first terminal device can determine whether to forward the downlink data from the network device to the second terminal device according to the above-mentioned item 3 and item 4. For example, if the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, and the load of the first terminal device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device. If the downlink channel quality between the second terminal device and the network device is greater than or equal to the second threshold value, and the load of the first terminal device is greater than or equal to the first threshold value, the first terminal device can determine not to forward the downlink data from the network device to the second terminal device. For another example, if the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold value, and the load of the first terminal device is less than or equal to the second threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device. For another example, if the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, and the load of the first terminal device is greater than or equal to the first threshold value, the first terminal device can determine to forward the downlink data from the network device to the second terminal device, or can determine not to forward the downlink data from the network device to the second terminal device.

[0128] The first terminal device can also determine whether to relay downlink data from the network device for the second terminal device according to the above-mentioned item 1, item 2, and item 4. For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold, and the load of the first terminal device is less than or equal to a second threshold, the first terminal device can determine to relay downlink data from the network device for the second terminal device. For another example, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the first threshold, the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold, and the load of the first terminal device is greater than or equal to the first threshold, the first terminal device can determine not to relay downlink data from the network device for the second terminal device.

[0129] The first terminal device can also determine whether to relay downlink data from the network device for the second terminal device according to the above-mentioned item 1, item 3, and item 4. For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, and the load of the first terminal device is less than or equal to the second threshold, the first terminal device can determine to relay downlink data from the network device for the second terminal device. For another example, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the first threshold, the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold, and the load of the first terminal device is greater than or equal to the first threshold, the first terminal device can determine not to relay downlink data from the network device for the second terminal device.

[0130] The first terminal device can also determine whether to relay downlink data from the network device for the second terminal device according to the above-mentioned item 2, item 3, and item 4. For example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to a first threshold, the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, and the load of the first terminal device is less than or equal to the second threshold, the first terminal device can determine to relay downlink data from the network device for the second terminal device. For another example, if the downlink channel quality between the first terminal device and the network device is less than or equal to the second threshold, the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold, and the load of the first terminal device is greater than or equal to the first threshold, the first terminal device can determine not to relay downlink data from the network device for the second terminal device.

[0131] The first terminal device can also determine whether to forward the downlink data from the network device to the second terminal device according to the above-mentioned item 1, item 2, item 3 and item 4. For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold, the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, and the load of the first terminal device is less than or equal to the second threshold, the first terminal device can determine to forward the downlink data from the network device to the second terminal device.

[0132] Item 5: The third information.

[0133] The third information here can be used to indicate that the second terminal device expects to receive the downlink data sent by the network device, or can also be used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device. For example, if the third information indicates that the second terminal device expects to receive the downlink data sent by the network device, the first terminal device can determine not to forward the downlink data from the network device to the second terminal device. If the third information indicates that the second terminal device expects to receive the downlink data forwarded by the first terminal device, the first terminal device can determine to forward the downlink data from the network device to the second terminal device.

[0134] In an embodiment, the first terminal device can determine whether to forward the downlink data from the network device to the second terminal device according to at least one of the above-mentioned item 1 to item 5. For example, the first terminal device can determine whether to forward the downlink data from the network device to the second terminal device according to the above-mentioned item 1 and item 5, or item 2 and item 5, or item 3 and item 5, or item 4 and item 5. Alternatively, the first terminal device can determine whether to forward the downlink data from the network device to the second terminal device according to the above-mentioned item 1, item 2 and item 5, or item 1, item 2, item 3 and item 5, or item 1, item 2, item 3, item 4 and item 5. For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the downlink channel quality between the first terminal device and the network device is greater than or equal to the first threshold, the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, the load of the first terminal device is less than or equal to the second threshold, and the third information is used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device, the first terminal device can determine to forward the downlink data from the network device to the second terminal device.

[0135] In another embodiment, if the first terminal device receives information of a second beam selected by the second terminal device, or any one of the above items 1 to 5, the first terminal device can default that the second terminal device forwards downlink data from the network device.

[0136] Referring to Figure 5 is an exemplary flowchart of the communication method provided by the embodiments of the present application from the perspective of device interaction, which can include the following steps:

[0137] Step 501: The second terminal device sends first information to the first terminal device.

[0138] The second terminal device can send the first information to the first terminal device according to the measurement result of the beam reference signal of the beam of the network device. Optionally, the second terminal device can also send uplink data to the first terminal device.

[0139] The description of the first information can be referred to the related description as Figure 3 shown, which will not be repeated here.

[0140] Step 502: The first terminal device sends the identification information of the second terminal device to the network device.

[0141] Optionally, the first terminal device can send the uplink data of the second terminal device to the network device.

[0142] At this time, the first terminal device determines to forward downlink data from the network device to the second terminal device. Therefore, the first terminal device can send the identification information of the second terminal device to the network device through the uplink resource corresponding to the first beam selected by itself.

[0143] Optionally, the first terminal device can send the uplink data of the second terminal device to the network device through the uplink resource corresponding to the first beam selected by itself.

[0144] Step 503: The network device sends downlink data of the second terminal device to the first terminal device.

[0145] The downlink data here can contain the identification information of the second terminal device, or can contain indication information of the identification information. The first terminal device can determine which terminal device the downlink data belongs to according to the identification information or the indication information contained in the downlink data. The network device can send the downlink data of the second terminal device to the first terminal device through the first beam selected by the first terminal device.

[0146] Step 504: The first terminal device detects DCI within a time range T1.

[0147] The time range T1 can be predefined by a protocol or pre-configured, which is not limited in the present application. The first terminal device can search in the detection window using its own identification information and / or cluster identification information when detecting the DCI. The DCI is used to schedule the PDSCH carrying the downlink data of the second terminal device.

[0148] Step 505: The first terminal device transmits the downlink data of the second terminal device to the second terminal device within the time range T2.

[0149] The time range T2 can be predefined by a protocol or pre-configured, which is not limited in the present application. The first terminal device can carry the downlink data in the PSSCH or the PSCCH.

[0150] The above steps 502-505 are an exemplary flowchart when the first terminal device determines to forward the downlink data from the network device to the second terminal device.

[0151] The following steps 506-507 are an exemplary flowchart when the first terminal device determines not to forward the downlink data from the network device to the second terminal device.

[0152] Step 506: The first terminal device transmits the identification information of the second terminal device and the first information to the network device.

[0153] Optionally, the first terminal device can transmit the uplink data of the second terminal device to the network device.

[0154] The first terminal device can carry the identification information and the first information in the PUSCH or the PUCCH. Alternatively, the first terminal device can transmit the identification information to the network device through the time-frequency resource associated with the second beam selected by the second terminal device in the first information.

[0155] Step 507: The network device transmits the downlink data to the second terminal device through the second beam selected by the second terminal device within the time range T3.

[0156] Optionally, the network device can carry the identification information of the second terminal device in the downlink data. For example, the identification information can be carried in the header of the data packet of the downlink data.

[0157] The time range T3 can be predefined by a protocol or pre-configured, which is not limited in the present application.

[0158] Step 508: The second terminal device detects the DCI within the time range T3 and detects the SCI within the time range T2.

[0159] Since the second terminal device is unclear whether the downlink data from the network device is forwarded by the first terminal device or sent by the network device, the second terminal device needs to detect the DCI and the SCI to receive the downlink data. The second terminal device can detect the DCI and the SCI in a detection window according to the identification information of the second terminal device and / or the cluster identification information. The DCI is used to schedule a PDSCH carrying the downlink data, and the SCI is used to schedule a PSSCH carrying the downlink data.

[0160] In addition, it should be noted that the first terminal device can send second indication information to the second terminal device. The second indication information can be used to indicate that the downlink data of the second terminal device is sent by the network device, or the second indication information can be used to indicate that the downlink data of the second terminal device can be forwarded by the first terminal device. If the first terminal device determines to forward the downlink data from the network device to the second terminal device, the second indication information is used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device. If the first terminal device determines not to forward the downlink data from the network device to the second terminal device, the second indication information is used to indicate that the downlink data of the second terminal device is sent by the network device.

[0161] If the second indication information is used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device, the second terminal device can detect sidelink control information (SCI) in a predefined or preconfigured time range. The SCI is used to schedule a physical sidelink shared channel (PSSCH) carrying the downlink data. If the second indication information is used to indicate that the downlink data of the second terminal device is sent by the network device, the second terminal device can detect DCI containing cluster identification information or identification information of the second terminal device in a predefined or preconfigured time range. The DCI can be used to schedule a PDSCH carrying the downlink data.

[0162] Referring to Figure 6 is an exemplary flowchart of the access method provided by the embodiments of the application from the perspective of device interaction, which can include the following steps:

[0163] Steps 601-602 can be the same as steps 501-502 as shown in Figure 5

[0164] Step 603: The first terminal device sends second indication information to the second terminal device.

[0165] ​The second indication information can be used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device. It should be understood that the execution order of steps 603 and 602 is not limited to the order shown in FIG. 6B. For example, steps 602 and 603 can be executed simultaneously, or step 603 can be executed before step 602. Figure 6

[0166] Steps 604-606 can be the same as steps 503-505 shown in FIG. 5A. Figure 5

[0167] Step 607: The second terminal device detects SCI in a time range T2.

[0168] The time range T2 can be predefined by a protocol or pre-configured, and the present application is not limited to this. The second terminal device can search for the SCI in the detection window according to its own identification information and / or cluster identification information. The SCI is used to schedule a PSSCH carrying downlink data.

[0169] The above steps 602-607 are an exemplary flowchart when the first terminal device determines to forward the downlink data from the network device to the second terminal device and sends the second indication information to the second terminal device.

[0170] The following steps 608-610 are an exemplary flowchart when the first terminal device determines not to forward the downlink data from the network device to the second terminal device and sends the second indication information to the second terminal device.

[0171] Step 608: The first terminal device sends the identification information of the second terminal device and the first information to the network device.

[0172] The first terminal device can carry the identification information and the first information in a PUSCH or a PUCCH. Alternatively, the first terminal device can send the identification information to the network device through a time-frequency resource associated with the second beam selected by the second terminal device in the first information.

[0173] Step 609: The first terminal device sends the second indication information to the second terminal device.

[0174] The second indication information can be used to indicate that the downlink data of the second terminal device is sent by the network device. It should be understood that the execution order of steps 608 and 609 is not limited to the order shown in FIG. 6B. For example, steps 608 and 609 can be executed simultaneously, or step 609 can be executed before step 608. Figure 6

[0175] ​​​Step 610: The network device transmits, within a time range T3, the downlink data to the second terminal device through a second beam selected by the second terminal device.

[0176] The time range T3 here can be pre-defined by a protocol or can be pre-set, which is not specifically limited in the present application.

[0177] Step 611: The second terminal device detects the DCI within the time range T3.

[0178] The second terminal device can search for the DCI within a detection window according to its own identification information and / or cluster identification information. The DCI is used to schedule a PDSCH carrying the downlink data.

[0179] Embodiment 2: The second terminal device determines whether the downlink data from the network device is forwarded by the first terminal device.

[0180] The second terminal device can determine whether the downlink data from the network device is forwarded by the first terminal device according to the second information. The second information here can include the first item to the fourth item as described in Case 1. The second terminal device can determine whether the downlink data is forwarded by the first terminal device according to any one or more of the first item to the fourth item.

[0181] For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the second terminal device can determine that the downlink data is forwarded by the first terminal device. Or, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold, the second terminal device can determine that the downlink data is transmitted by the network device. The first threshold and the second threshold here can be determined according to empirical values, and the first threshold and the second threshold can be the same or different, which is not specifically limited in the present application.

[0182] For another example, if the downlink channel quality between the second terminal device and the network device is greater than or equal to a first threshold, the second terminal device can determine that the downlink data is transmitted by the network device. If the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, the second terminal device can determine that the downlink data is forwarded by the first terminal device. The first threshold and the second threshold here can be determined according to empirical values, and the first threshold and the second threshold can be the same or different, which is not specifically limited in the present application.

[0183] For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to the first threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the second terminal device can determine that the downlink data is forwarded by the first terminal device. Alternatively, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold value, the second terminal device can determine that the downlink data is sent by the network device. Alternatively, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to the first threshold value, and the downlink channel quality between the second terminal device and the network device is greater than or equal to the first threshold value, the first terminal device can determine that the downlink data is sent by the network device or forwarded by the first terminal device. Alternatively, if the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to the second threshold value, and the downlink channel quality between the second terminal device and the network device is less than or equal to the second threshold value, the second terminal device can determine that the downlink data is sent by the network device or forwarded by the first terminal device.

[0184] In the embodiments of the present application, the second terminal device can send third information to the first terminal device. The third information can be used to indicate that the second terminal device expects to receive the downlink data sent by the network device, or the third information can be used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device. Alternatively, if the second terminal device does not send the third information to the first terminal device, the first terminal device can default that the second terminal device forwards the downlink data from the network device. Alternatively, if the second terminal device does not send the third information to the first terminal device, the first terminal device can default not to forward the downlink data from the network device to the first terminal device. For example, the third information can be carried in the first information.

[0185] Referring to Figure 7 An exemplary flowchart of the communication method provided by the embodiments of the present application is shown from the perspective of device interaction, which can include the following steps.

[0186] Step 701: The second terminal device sends first information to the first terminal device.

[0187] The second terminal device can send the first information to the first terminal device according to the measurement result of the beam reference signal of the beam of the network device. Optionally, the second terminal device can send uplink data to the first terminal device.

[0188] The description of the first information can be referred to, for example, Figure 3The related description is shown, and details are not repeated here. The second terminal device can determine whether to forward the downlink data from the network device by the first terminal device according to the measurement result. The following steps 702-706 are the process of determining the first terminal device to forward the downlink data from the network device.

[0189] Step 702: The first terminal device sends the identification information of the second terminal device to the network device.

[0190] Optionally, the first terminal device can send the uplink data of the second terminal device to the network device.

[0191] Since the first terminal device does not receive the third information sent by the second terminal device to indicate whether to forward the downlink data from the network device by the first terminal device, it can be defaulted that the second terminal device expects to forward the downlink data from the network device by the first terminal device. Alternatively, the first information contains the third information for indicating that the second terminal device expects to receive the downlink data from the network device forwarded by the first terminal device. The first terminal device can send the identification information of the second terminal device to the network device through the first beam selected by itself.

[0192] Step 703: The network device sends the downlink data of the second terminal device to the first terminal device.

[0193] The downlink data here can contain the identification information of the second terminal device, or can contain the indication information of the identification information. The first terminal device can determine which terminal device the downlink data belongs to according to the identification information or the indication information contained in the downlink data.

[0194] Step 704: The first terminal device detects the DCI within the time range T1.

[0195] The time range T1 here can be protocol predefined or pre-set, which is not limited in the present application. When detecting the DCI, the first terminal device can use its own identification information and / or cluster identification information to search within the detection window. The DCI here is used to schedule the PDSCH carrying the downlink data of the second terminal device.

[0196] Step 705: The first terminal device sends the downlink data of the second terminal device to the second terminal device within the time range T2.

[0197] The time range T2 here can be protocol predefined or pre-set, which is not limited in the present application. The first terminal device can carry the downlink data in PSSCH or PSCCH.

[0198] Step 706: The second terminal device detects the SCI within the time range T2.

[0199] The second terminal device can search the SCI within the detection window according to the identification information of the second terminal device and / or the cluster identification information. The SCI is used to schedule the PSSCH carrying the downlink data.

[0200] The following steps 707-709 are exemplary procedures for the second terminal device to determine whether the downlink data is sent by the network device.

[0201] Step 707: The first terminal device sends the identification information of the second terminal device and the first information to the network device.

[0202] Optionally, the first terminal device can send the uplink data of the second terminal device to the network device.

[0203] Since the first terminal device does not receive the third information sent by the second terminal device indicating whether the downlink data from the network device is forwarded by the first terminal device, it can be assumed that the second terminal device expects to receive the downlink data sent by the network device. Alternatively, the third information is included in the first information, which indicates that the second terminal device expects to receive the downlink data sent by the network device. The first terminal device can carry the identification information and the first information in the PUSCH or the PUCCH. Alternatively, the first terminal device can send the identification information to the network device through the time-frequency resource associated with the second beam selected by the second terminal device in the first information.

[0204] Step 708: The network device sends the downlink data to the second terminal device through the second beam selected by the second terminal device within the time range T3.

[0205] The time range T3 here can be predefined by the protocol or can be pre-set, which is not limited in the present application.

[0206] Step 709: The second terminal device detects the DCI within the time range T3.

[0207] The second terminal device can search the DCI within the detection window according to the identification information of the second terminal device and / or the cluster identification information. The DCI is used to schedule the PDSCH carrying the downlink data.

[0208] Embodiment 3: The network device determines whether to forward the downlink data of the second terminal device by the first terminal device.

[0209] The network device can receive the second information sent by the first terminal device. The second information is information required for determining whether the first terminal device forwards the downlink data of the second terminal device from the network device, and can include the first item to the fifth item as described in case 1. The network device can determine whether the downlink data of the second terminal device is forwarded by the first terminal device according to any one or more of the first item to the fifth item.

[0210] For example, if the sidelink channel quality between the first terminal device and the second terminal device is greater than or equal to a first threshold, the network device can determine that the downlink data of the second terminal device is forwarded by the first terminal device. If the sidelink channel quality between the first terminal device and the second terminal device is less than or equal to a second threshold, the network device can determine that the downlink data of the second terminal device is not forwarded by the first terminal device.

[0211] For another example, if the downlink channel quality between the first terminal device and the network device is greater than or equal to a first threshold, the network device can determine that the downlink data of the second terminal device is forwarded by the first terminal device. If the downlink channel quality between the first terminal device and the network device is less than or equal to a second threshold, the downlink data of the second terminal device is not forwarded by the first terminal device.

[0212] For another example, if the downlink channel quality between the second terminal device and the network device is greater than or equal to a first threshold, the network device can determine that the downlink data of the second terminal device is not forwarded by the first terminal device. If the downlink channel quality between the second terminal device and the network device is less than or equal to a second threshold, the network device can determine that the downlink data of the second terminal device is forwarded by the first terminal device.

[0213] Referring to Figure 8 An exemplary flowchart of a communication method provided by an embodiment of the application is shown from the perspective of device interaction, and can include the following steps.

[0214] Step 801: The second terminal device sends first information to the first terminal device.

[0215] The second terminal device can send the first information to the first terminal device according to the measurement result of the beam reference signal of the beam of the network device. Optionally, the second terminal device can also send uplink data to the first terminal device.

[0216] The description of the first information can be referred to the related description as shown in Figure 3 , which will not be described here again.

[0217] Step 802: The first terminal device sends the identification information of the second terminal device, the first information and the second information to the network device.

[0218] Optionally, the first terminal device can send the uplink data of the second terminal device to the network device.

[0219] The first terminal device can send the identification information, the first information and the second information to the network device through the first beam selected by the first terminal device.

[0220] The network device can determine, according to the second information, whether the downlink data of the second terminal device is forwarded by the first terminal device. The following steps 803-805 are an exemplary flowchart in which the network device determines that the downlink data of the second terminal device is forwarded by the first terminal device.

[0221] Step 803: The network device sends the downlink data of the second terminal device to the first terminal device.

[0222] The network device can send the downlink data of the second terminal device to the first terminal device through the first beam. The downlink data can contain the identification information of the second terminal device, or can contain the indication information of the identification information.

[0223] Step 804: The first terminal device detects the DCI within the time range T1.

[0224] The time range T1 can be predefined by the protocol or can be pre-set, which is not limited in the present application. When detecting the DCI, the first terminal device can use its own identification information and / or cluster identification information to search within the detection window. The DCI is used to schedule the PDSCH carrying the downlink data of the second terminal device.

[0225] Step 805: The first terminal device sends the downlink data of the second terminal device to the second terminal device within the time range T2.

[0226] The time range T2 can be predefined by the protocol or can be pre-set, which is not limited in the present application. The first terminal device can carry the downlink data in the PSSCH or the PSCCH.

[0227] The following steps 806-807 are an exemplary flowchart in which the network device determines that the downlink data of the second terminal device is not forwarded by the first terminal device.

[0228] Step 806: The network device sends the downlink data to the second terminal device through the second beam selected by the second terminal device within the time range T3.

[0229] The time range T3 can be predefined by the protocol or can be pre-set, which is not limited in the present application.

[0230] Step 807: The first terminal device detects the DCI within the time range T3.

[0231] Since the first terminal device is not aware of the decision of the network device, i.e., the first terminal device is not aware of whether the downlink data of the second terminal device is forwarded by itself or not, the first terminal device still needs to detect the DCI. When detecting the DCI, the first terminal device can search within the detection window using the identification information of itself and / or the cluster identification information. The DCI is used to schedule the PDSCH carrying the downlink data of the second terminal device.

[0232] Step 808: The second terminal device detects the DCI within the time range T3, and detects the SCI within the time range T2.

[0233] Since the second terminal device is not aware of whether the downlink data from the network device is forwarded by the first terminal device or transmitted by the network device, the second terminal device needs to detect the DCI and the SCI to receive the downlink data. The second terminal device can search for the DCI and the SCI within the detection window according to the identification information of itself and / or the cluster identification information. The DCI is used to schedule the PDSCH carrying the downlink data, and the SCI is used to schedule the PSSCH or the PSCCH carrying the downlink data.

[0234] In an embodiment, the network device can send third indication information to the first terminal device. The third indication information can be used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device, or the third indication information can be used to indicate that the downlink data of the second terminal device is transmitted by the network device. Therefore, the first terminal device can also send second indication information to the second terminal device according to the third indication information. If the third indication information is used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device, the second indication information is used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device. If the third indication information is used to indicate that the downlink data of the second terminal device is transmitted by the network device, the second indication information is used to indicate that the downlink data of the second terminal device is transmitted by the network device.

[0235] Optionally, the network device can send fourth indication information to the second terminal device. The fourth indication information can indicate that the downlink data of the second terminal device is transmitted by the network device. For example, if the downlink data of the second terminal device is transmitted by the network device, the network device can send the fourth indication information to the second terminal device. The second terminal device can search for the DCI within the detection window according to the fourth indication information. If the second terminal device does not receive the fourth indication information, the second terminal device can default that the downlink data is forwarded by the first terminal device, and therefore the second terminal device can search for the SCI within the detection window.

[0236] Referring to Figure 9 is an exemplary flowchart of the communication method provided by the embodiments of the present application from the perspective of device interaction, which can include the following steps:

[0237] Steps 901-903 can be the same as steps 801-803 as shown in Figure 8 .

[0238] Step 904: The network device sends third indication information to the first terminal device.

[0239] The third indication information here is used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device. It should be understood that the execution order of steps 903 and 904 is not limited to the order as shown in Figure 9 , and step 904 can be executed before step 903, or steps 903 and 904 can be executed simultaneously.

[0240] Steps 905-906 can be the same as steps 804-805 as shown in Figure 8 .

[0241] Step 907: The first terminal device sends second indication information to the second terminal device.

[0242] The second indication information here can be used to indicate that the downlink data of the second terminal device is forwarded by the first terminal device. It should be understood that the execution order of steps 906 and 907 is not limited to the order as shown in Figure 9 , and step 907 can be executed before step 906, or steps 906 and 907 can be executed simultaneously.

[0243] Step 908: The second terminal device detects SCI within a time range T2.

[0244] The second terminal device can search for SCI within the detection window according to its own identification information and / or cluster identification information. The SCI is used to schedule PSSCH or PSCCH carrying downlink data.

[0245] The above steps 904-908 are exemplary processes when the network device determines that the first terminal device forwards the downlink data of the second terminal device, and sends third indication information to the first terminal device.

[0246] The following steps 909-912 are exemplary processes when the network device determines to send downlink data to the second terminal device, and sends third indication information to the first terminal device.

[0247] Step 909: The network device sends third indication information to the first terminal device.

[0248] The third indication information herein is used to indicate that the downlink data of the second terminal device is sent by the network device. It should be understood that the execution order of steps 903 and 909 is not limited to the order as shown in the figure, and step 909 can also be executed before step 903, or steps 903 and 909 can also be executed simultaneously. Figure 9

[0249] Step 910: The network device sends the downlink data to the second terminal device through the second beam selected by the second terminal device within the time range T3.

[0250] Step 911: The first terminal device sends second indication information to the second terminal device.

[0251] The second indication information herein can be used to indicate that the downlink data of the second terminal device is sent by the network device.

[0252] Step 912: The second terminal device detects the DCI within the time range T3.

[0253] The time range T3 herein can be protocol predefined or pre-set, which is not limited in the present application. The second terminal device can search for the DCI within the detection window according to its own identification information and / or cluster identification information. The DCI is used to schedule the PDSCH or PDSCH carrying the downlink data.

[0254] Based on the same technical concept as the above communication method, as shown in the figure, a device 1000 with communication function is provided. The device 1000 can execute each step in the above method executed by the first terminal device or the second terminal device, and to avoid repetition, it will not be described here. The device 1000 comprises a communication unit 1010, a processing unit 1020, and optionally a storage unit 1030; the processing unit 1020 can be connected to the storage unit 1030 and the communication unit 1010 respectively, and the storage unit 1030 can also be connected to the communication unit 1010. The processing unit 1020 can be integrated with the storage unit 1030. Figure 10 The storage unit 1030 is used to store a computer program.

[0255] For example, when the communication device 1000 executes each step executed by the first terminal device, the communication unit 1010 is used to receive the first information sent by the second terminal device. The description of the first information herein can be referred to the related description as shown in the figure, and will not be described here. The communication unit 1010 can send the identification information of the second terminal device to the network device, or can send the identification information and the first information to the network device.

[0256] Figure 3 The communication unit 1010 can send the identification information of the second terminal device to the network device, or can send the identification information and the first information to the network device.​​

[0257] In an example, the processing unit 1020 can be configured to determine, according to the second information, whether to send the identification information to the network device via the communication unit 1010 or to send the identification information and the first information to the network device. The second information can be described as described in the method embodiments with reference to Figure 3 , and details are not repeated here.

[0258] In an example, the communication unit 1010 can be configured to send the second information to the network device. The communication unit 1010 can also be configured to receive the first indication information of the network device.

[0259] In an example, if the third information is used to indicate that the second terminal device expects to receive the downlink data sent by the network device, the processing unit 1020 can be configured to send the identification information of the second terminal device and the first information to the network device via the communication unit 1010. If the third information is used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device, the processing unit 1020 can be configured to send the identification information to the network device via the communication unit 1010.

[0260] In an example, when the communication unit 1010 is configured to send the identification information and the first information to the network device, the communication unit 1010 can be configured to send the identification information to the network device via the time-frequency resource associated with the second beam selected by the second terminal device.

[0261] In an example, the communication unit 1010 can be configured to send the second indication information to the second terminal device. The second indication information can be described as described in the method embodiments with reference to Figure 3 .

[0262] For example, when the apparatus 1000 performs the steps performed by the second terminal device, the processing unit 1020 can be configured to send the first information to the first terminal device via the communication unit 1010 according to the measurement result of the beam reference signal of the beam of the network device. The first information can be described as described in the method embodiments with reference to Figure 3 , and details are not repeated here. The communication unit 1010 can receive data. The data can be downlink data sent by the network device, or the data can be downlink data from the network device forwarded by the first terminal device.

[0263] In an example, the communication unit 1010 can be configured to receive the second indication information. The second indication information can be described as described in the method embodiments with reference to Figure 3The processing unit 1020 can receive the downlink data sent by the network device or the downlink data from the network device forwarded by the first terminal device according to the second indication information through the communication unit 1010.

[0264] In one design, if the third information is used to indicate that the second terminal device expects to receive the downlink data sent by the network device, the communication unit 1010 is configured to receive the downlink data sent by the network device. If the third information is used to indicate that the second terminal device expects to receive the downlink data forwarded by the first terminal device, the communication unit 1010 is configured to receive the downlink data forwarded by the first terminal device.

[0265] The apparatus described above can also be a chip, wherein the communication unit can be an input / output circuit or interface of the chip, and the processing unit can be a logic circuit. The logic circuit can process the data to be processed according to the steps described in the method aspects, and obtain the processed data. The output circuit / interface is configured to output the processed data.

[0266] Embodiments of the present application also provide a terminal device, which can be a terminal device or a circuit. The terminal device can be configured to perform the actions performed by the first terminal device and the second terminal device in the method embodiments.

[0267] Figure 11 A simplified structure diagram of a terminal device is shown. For the convenience of understanding and illustration, Figure 11 In the embodiment, the terminal device takes a mobile phone as an example. As Figure 11 shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal device, executing software programs, processing data of the software programs, etc. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user. It should be noted that some types of terminal devices can not have an input / output device.

[0268] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then transmits the RF signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For the sake of explanation, Figure 11 Only one memory and processor are shown. In actual terminal device products, one or more processors and one or more memories may exist. Memory may also be referred to as a storage medium or storage device. The memory may be provided independently of the processor or integrated with the processor, and this is not limited in the embodiments of the present application.

[0269] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the communication unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device. Figure 11 As shown, the terminal device includes a communication unit 1110 and a processing unit 1120. The communication unit may also be referred to as a transceiver, transceiver, or transceiver device. The processing unit may also be referred to as a processor, processing board, processing module, or processing device. Optionally, the device in the communication unit 1110 that implements the receiving function may be considered a receiving unit, and the device in the communication unit 1110 that implements the transmitting function may be considered a transmitting unit. That is, the communication unit 1110 includes a receiving unit and a transmitting unit. The communication unit may also be referred to as a transceiver, transceiver, or transceiver circuit. The receiving unit may also be referred to as a receiver, receiver, or receiving circuit. The transmitting unit may also be referred to as a transmitter, transmitter, or transmitting circuit.

[0270] It should be understood that the communication unit 1110 is used to perform sending and receiving operations on the first terminal device and the second terminal device in the above method embodiment, and the processing unit 1120 is used to perform other operations except sending and receiving operations on the first terminal device and the second terminal device in the above method embodiment.

[0271] For example, in one implementation, the communication unit 1110 is used to perform Figure 3 The receiving and / or sending operations on the first and second terminal devices in steps 301-303 of the present application, and / or the communication unit 1110 is further configured to perform other receiving and sending steps on the first and second terminal devices in the embodiments of the present application. The processing unit 1120 is configured to perform other processing steps on the first and second terminal devices in the embodiments of the present application.

[0272] When the terminal device is a chip type device or circuit, the device can include a communication unit and a processing unit. The communication unit can be an input / output circuit and / or a communication interface, and the processing unit can be an integrated processor or microprocessor or integrated circuit.

[0273] Based on the same technical concept as the above communication method, as shown in Figure 12 A device 1200 with communication function is provided. The device 1200 can perform each step in the above method by the network device, and to avoid repetition, details are not described here. The device 1200 includes a communication unit 1210, a processing unit 1220, and optionally a storage unit 1230. The processing unit 1220 can be connected to the storage unit 1230 and the communication unit 1210 respectively, and the storage unit 1230 can also be connected to the communication unit 1210. The processing unit 1220 can be integrated with the storage unit 1230.

[0274] The storage unit 1230 is configured to store a computer program.

[0275] For example, the communication unit 1210 is configured to receive the identification information of the second terminal device sent by the first terminal device. The identification information can refer to the related description in the method embodiment as shown in Figure 3 The communication unit 1210 is also configured to send the downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device, or send the downlink data of the second terminal device to the first terminal device through the first beam selected by the first terminal device.

[0276] In one design, the processing unit 1220 is configured to determine, according to the second information, to send the downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device, or send the downlink data of the second terminal device to the first terminal device through the first beam selected by the first terminal device, through the communication unit 1210. The second information can refer to the related description in the method embodiment as shown in Figure 3

[0277] ​In one design, if the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the communication unit 1210 may be used to send the downlink data of the second terminal device to the second terminal device via the second beam selected by the second terminal device. If the third information is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device, the communication unit 1210 may be used to send the downlink data of the second terminal device to the first terminal device via the first beam selected by the first terminal device.

[0278] In one design, the communication unit 1210 may be configured to receive information about a first beam sent by the first terminal device. The first beam here may refer to Figure 3 The processing unit 1220 may be configured to determine, based on the information of the first beam, whether to transmit the downlink data of the second terminal device to the first terminal device via the communication unit 1210 via the first beam selected by the first terminal device.

[0279] In one design, the communication unit 1210 may be configured to receive first information of the second terminal device sent by the first terminal device. The first information is used to indicate information of the second beam selected by the second terminal device. The second beam here may refer to Figure 3 Related description in the method embodiment shown.

[0280] The processing unit 1220 can be used to determine, based on the information of the second beam, whether to send the downlink data of the second terminal device to the second terminal device through the communication unit 1210 through the second beam selected by the second terminal device.

[0281] The above-mentioned device may also be a chip, wherein the communication unit may be an input / output circuit or interface of the chip, and the processing unit may be a logic circuit. The logic circuit may process the data to be processed according to the steps described in the above-mentioned method aspects to obtain processed data. The data to be processed may be data received by the input circuit / interface. The output circuit / interface is used to output the processed data.

[0282] like Figure 13 The device 1300 with communication functions provided in an embodiment of the present application is shown, and is used to implement the functions of the first terminal device, the second terminal device, and the network device in the above method. The device can be the first terminal device, the second terminal device, or the network device, or a chip with similar functions to the first terminal device, the second terminal device, or the network device, or a device that can be used in conjunction with the first terminal device, the second terminal device, or the network device.

[0283] The apparatus 1300 includes at least one processor 1320 configured to implement methods provided by embodiments of the present application, for example, the functions of the first terminal device, the second terminal device, and the network device in the methods. The apparatus 1300 can further include a communication interface 1310. In embodiments of the present application, the communication interface can be a transceiver, a circuit, a bus, a module, or another type of communication interface, configured to communicate with other devices through a transmission medium. For example, the communication interface 1310 is configured to enable the apparatus 1300 to communicate with other devices. When the apparatus 1300 is the first terminal device and the second terminal device, the processor 1320 can perform the functions of the processing unit 1020 as illustrated in FIG. 10, and the communication interface 1310 can perform the functions of the communication unit 1010 as illustrated in FIG. 10. When the apparatus 1300 is the network device, the processor 1320 can perform the functions of the processing unit 1220 as illustrated in FIG. 12, and the communication interface 1310 can perform the functions of the communication unit 1210 as illustrated in FIG. 12. Figure 10 Figure 10 Figure 12 Figure 12

[0284] The apparatus 1300 can further include at least one memory 1330 configured to store program instructions and / or data. The memory 1330 is coupled to the processor 1320. The coupling between the memory 1330 and the processor 1320 is indirect coupling or communication connection between apparatuses, units, or modules, which can be electrical, mechanical, or other forms, for information interaction between apparatuses, units, or modules. The processor 1320 can operate in cooperation with the memory 1330. The processor 1320 can execute program instructions stored in the memory 1330. At least one of the at least one memory can be included in the processor.

[0285] The specific connection medium between the communication interface 1310, the processor 1320, and the memory 1330 is not limited in embodiments of the present application. In embodiments of the present application, the memory 1330, the processor 1320, and the communication interface 1310 are connected through a bus 1340, which is represented by a thick line in Figure 13 Figure 13 In embodiments of the present application, the bus is represented by a thick line for convenience, but it does not mean that there is only one bus or only one type of bus. Figure 13

[0286] As another form of the present embodiment, a computer-readable storage medium is provided, which stores instructions that, when executed, perform the method of the network device side or the first terminal device side or the second terminal device side in the above method embodiments.

[0287] ​​​​​​As another form of the embodiment, a computer program product including instructions, which when executed, perform the method of the first terminal device side or the second terminal device side or the network device side in the above-mentioned method embodiment is provided.

[0288] As another form of the embodiment, a communication system can include the above-mentioned at least one first terminal device, at least one second terminal device and the above-mentioned at least one network device.

[0289] It should be understood that the processor mentioned in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0290] It should also be understood that the memory referred to in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a Random Access Memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM) and Direct Rambus RAM (DR RAM).

[0291] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0292] It should be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0293] It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0294] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0295] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0296] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are merely schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0297] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0298] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0299] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0300] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: Comprising: The first terminal device receives first information sent by a second terminal device; The first information comprises information for indicating a second beam selected by the second terminal device; wherein the second beam is used for sending by a network device; The first terminal device sends identification information of the second terminal device and the first information to the network device; The first terminal device is a cluster head node, and the second terminal device is a member node of a cluster where the first terminal device is located.

2. The method of claim 1, wherein, The first terminal device sends the identification information and the first information to the network device, comprising: The first terminal device determines to send the identification information and the first information to the network device according to second information; The second information is information required for determining whether the first terminal device forwards downlink data sent by the network device to the second terminal device.

3. The method according to claim 1 or 2, characterized in that, Further comprising: The first terminal device sends second information to the network device; The second information is information required for determining whether the first terminal device forwards downlink data of the second terminal device; The first terminal device sends the identification information and the first information to the network device, comprising: The first terminal device receives first indication information of the network device, and sends the identification information and the first information to the network device.

4. The method according to claim 1 or 2, characterized in that, The first information further comprises at least one of the following: A sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the second terminal device and the network device, or third information of the second terminal device; the third information is used for indicating that the second terminal device expects to receive downlink data sent by the network device, or is used for indicating that the second terminal device expects to receive downlink data forwarded by the first terminal device.

5. The method of claim 2, wherein, The second information comprises at least one of the following: A sidelink channel quality between the first terminal device and the second terminal device, a downlink channel quality between the first terminal device and the network device, a downlink channel quality between the second terminal device and the network device, load information of the first terminal device, or third information; the third information is used for indicating that the second terminal device expects to receive downlink data sent by the network device, or is used for indicating that the second terminal device expects to receive downlink data forwarded by the first terminal device.

6. The method of claim 5, wherein, The first terminal device sends the identification information and the first information to the network device, comprising: If the third information in the first information is used for indicating that the second terminal device expects to receive downlink data sent by the network device, the first terminal device sends the identification information of the second terminal device and the first information to the network device.

7. The method according to any of claims 1, 2, 5, 6, characterized in that, Further comprising: The first terminal device sends second indication information to the second terminal device, the second indication information being used for indicating that downlink data of the second terminal device is sent by the network device.

8. A communication method characterized by comprising: Comprising: The network device receives identification information of a second terminal device and first information sent by a first terminal device; The first information is used to indicate information of a second beam selected by the second terminal device; The network device sends downlink data of the second terminal device to the second terminal device through the second beam. The first terminal device is a cluster head node, the second terminal device is a member node of a cluster in which the first terminal device is located, and the second beam is used for the network device to send.

9. The method of claim 8, wherein, The network device sends downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device, including: The network device sends downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device according to second information; the second information is information required to determine whether the first terminal device forwards the downlink data of the second terminal device.

10. The method of claim 9, wherein, The second information includes at least one of the following: The sidelink channel quality between the first terminal device and the second terminal device, the downlink channel quality between the first terminal device and the network device, the downlink channel quality between the second terminal device and the network device, the load information of the first terminal device, or third information; the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, or is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device.

11. The method according to claim 9 or 10, characterized in that, The network device sends downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device, including: If the third information in the second information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the network device sends downlink data of the second terminal device to the second terminal device through the second beam selected by the second terminal device.

12. The method according to any of claims 8-10, characterized by, The second beam is determined according to a time-frequency resource in which the identification information is received.

13. A method of communication, comprising: Including: The second terminal device sends first information to the first terminal device according to a measurement result of a beam of the network device, so that the first terminal device sends identification information of the second terminal device and the first information to the network device; The first information is used to indicate information of a second beam selected by the second terminal device; wherein the second beam is used for the network device to send; The second terminal device receives data; wherein the data is downlink data sent by the network device through the second beam; the first terminal device is a cluster head node, and the second terminal device is a member node of a cluster in which the first terminal device is located.

14. The method of claim 13, wherein, Also including: The second terminal device receives second indication information; The second indication information is used to indicate whether the first terminal device forwards downlink data of the second terminal device; The second terminal device receives the downlink data sent by the network device according to the second indication information.

15. The method according to claim 13 or 14, characterized in that, The first information includes at least one of: sidelink channel quality between the first terminal device and the second terminal device, downlink channel quality between the second terminal device and the network device, or third information of the second terminal device; the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, or is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device.

16. The method of claim 15, wherein, Also includes: If the third information in the first information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the second terminal device receives the downlink data sent by the network device.

17. A communications device, characterized by Includes: A communication unit and a processing unit The processing unit is configured to receive first information sent by a second terminal device through the communication unit; the first information includes information indicating a second beam selected by the second terminal device; wherein the second beam is used for network device transmission; The processing unit is further configured to send identification information of the second terminal device and the first information to the network device through the communication unit; The device is a cluster head node, and the second terminal device is a member node of a cluster where the device is located.

18. The apparatus of claim 17, wherein, When the processing unit sends the identification information and the first information to the network device through the communication unit, it is specifically configured to: According to the second information, determine whether to send the identification information and the first information to the network device; the second information is information required to determine whether the device forwards downlink data sent by the network device to the second terminal device.

19. The apparatus of claim 17 or 18, wherein, The processing unit is further configured to: Send second information to the network device through the communication unit; the second information is information required to determine whether the device forwards downlink data of the second terminal device; When the processing unit sends the identification information to the network device or sends the identification information and the first information to the network device through the communication unit, it is specifically configured to: Receive first indication information of the network device, and send the identification information and the first information to the network device.

20. The apparatus of any of claims 17-18, wherein, The first information further includes at least one of: Sidelink channel quality between the communication device and the second terminal device, downlink channel quality between the second terminal device and the network device, or third information of the second terminal device; the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, or is used to indicate that the second terminal device expects to receive downlink data forwarded by the communication device.

21. The apparatus of claim 18, wherein, The second information includes at least one of: The sidelink channel quality between the communication apparatus and the second terminal device, the downlink channel quality between the communication apparatus and the network device, the downlink channel quality between the second terminal device and the network device, load information of the communication apparatus, or third information; the third information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, or is used to indicate that the second terminal device expects to receive downlink data forwarded by the communication apparatus.

22. The apparatus of claim 20, wherein, The processing unit is specifically used for: If the third information in the first information is used to indicate that the second terminal device expects to receive downlink data sent by the network device, the identification information of the second terminal device and the first information are sent to the network device.

23. The apparatus of any of claims 17-18, 22, wherein, The processing unit is further used for: sending second indication information to the second terminal device through the communication unit; the second indication information is used to indicate that the downlink data of the second terminal device is sent by the network device.

24. A communications device, characterized by Comprise: a processing unit and a communication unit; The processing unit is used to receive the identification information of the second terminal device and the first information sent by the first terminal device through the communication unit; The first information is used to indicate the information of the second beam selected by the second terminal device; The processing unit is further used to send the downlink data of the second terminal device to the second terminal device through the second beam through the communication unit; Wherein, the first terminal device is a cluster head node, the second terminal device is a member node of the cluster where the first terminal device is located, and the second beam is used for the communication apparatus to send.

25. The apparatus of claim 24, wherein, The processing unit is specifically used for: According to the second information, the downlink data of the second terminal device is sent to the second terminal device through the second beam selected by the second terminal device; the second information is information required to determine whether the first terminal device forwards the downlink data of the second terminal device.

26. The apparatus of claim 25, wherein, The second information includes at least one of the following: The sidelink channel quality between the first terminal device and the second terminal device, the downlink channel quality between the first terminal device and the communication apparatus, the downlink channel quality between the second terminal device and the communication apparatus, the load information of the first terminal device, or third information; the third information is used to indicate that the second terminal device expects to receive downlink data sent by the communication apparatus, or is used to indicate that the second terminal device expects to receive downlink data forwarded by the first terminal device.

27. The apparatus of claim 25, wherein, The processing unit is specifically used for: If third information in the second information is used to indicate that the second terminal device expects to receive downlink data transmitted by the communication apparatus, the downlink data of the second terminal device is transmitted to the second terminal device through a second beam selected by the second terminal device.

28. The apparatus of any of claims 24-25, wherein, The second beam is determined according to a time-frequency resource in which the identification information is received.

29. A communications device, characterized by Comprise: A processing unit and a communication unit The processing unit is configured to transmit first information to a first terminal device through the communication unit according to a measurement result of a beam of a network device, so that the first terminal device transmits identification information of the communication apparatus and the first information to the network device; the first information is used to indicate information of a second beam selected by the communication apparatus; wherein the second beam is transmitted by the network device; The processing unit is further configured to receive data through the communication unit; wherein the data is downlink data transmitted by the network device through the second beam; the first terminal device is a cluster head node, and the communication apparatus is a member node of a cluster in which the first terminal device is located.

30. The apparatus of claim 29, wherein, The processing unit is further configured to: Receive second indication information through the communication unit; the second indication information is used to indicate whether the first terminal device forwards downlink data of the apparatus; According to the second indication information, receive the downlink data transmitted by the network device through the communication unit.

31. The apparatus of claim 29 or 30, wherein, The first information comprises at least one of the following: a sidelink channel quality between the first terminal device and the communication apparatus, a downlink channel quality between the communication apparatus and the network device, or third information of the communication apparatus; the third information is used to indicate that the communication apparatus expects to receive downlink data transmitted by the network device, or is used to indicate that the communication apparatus expects to receive downlink data forwarded by the first terminal device.

32. The apparatus of claim 31, wherein, The processing unit is further configured to: If the third information in the first information is used to indicate that the communication apparatus expects to receive downlink data transmitted by the network device, receive the downlink data transmitted by the network device through the communication unit.

33. A communications device, characterized by Comprise: A processor and a memory, The memory is configured to store computer programs or instructions; The processor is configured to execute the computer programs or instructions in the memory, so that the method of any one of claims 1-7 is executed, or so that the method of any one of claims 8-12 is executed, or so that the method of any one of claims 13-16 is executed.

34. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions, which, when invoked by a computer, cause the computer to execute the method of any one of claims 1-7, or execute the method of any one of claims 8-12, or execute the method of any one of claims 13-16.

Images