Information sending, information receiving method, device, equipment and storage medium

Abstract

The embodiments of the present disclosure disclose a kind of information sending, information receiving method, device, equipment, chip system and storage medium, can be applied in communication system, the method comprises: first terminal is determined to meet the first condition, based on unicast mode to second terminal additional information is sent.By implementing the method of the present disclosure, additional information can be effectively transmitted.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a method, apparatus, device and storage medium for transmitting and receiving information. Background Technology

[0002] Proximity services (ProSe) are device-to-device (D2D) technologies that allow wireless devices to detect and communicate directly with each other. ProSe User Equipment-to-Network relays (e.g., ProSe User Equipment-to-Network relay, ProSe UE-to-Network Relay) provide support for remote terminals to connect to the network. The remote terminal can be, for example, a Remote UE, a ProSe-enabled terminal. The remote terminal can communicate with the network through the ProSe User Equipment-to-Network Relay. This network can be a 4G network, a 5G network, or any other communication network. Discovery of neighboring service user equipment (PSUs) to network relay terminals can be achieved in two modes. In one mode (e.g., mode A), the neighboring PSU to network relay terminal can broadcast its own terminal information for use by other terminals, and remote terminals detect relevant messages to achieve discovery. In the other mode (e.g., mode B), a remote terminal can send a request to other terminals that expect to receive a response, i.e., initiate a discovery request for neighboring PSUs to network relay terminals, and eligible neighboring PSUs to network relay terminals respond to the corresponding request. In neighboring service application scenarios, additional information is usually required to assist communication.

[0003] In related technologies, additional information is usually sent based on mode A, but it cannot effectively send additional information when mode A is not used. Summary of the Invention

[0004] This disclosure provides an information sending and receiving method, apparatus, device, chip system, storage medium, computer program, and computer program product, which can be applied in the field of communication technology and can support the effective sending of additional information.

[0005] In a first aspect, embodiments of this disclosure provide an information sending method executed by a first terminal, the method comprising: sending additional information to a second terminal based on a unicast method when it is determined that a first condition is met.

[0006] Secondly, embodiments of this disclosure provide an information receiving method, executed by a second terminal, the method comprising: receiving additional information sent by a first terminal in a unicast manner.

[0007] Thirdly, embodiments of this disclosure provide a communication device that implements some or all of the functions of the first terminal in the method of the first aspect described above. For example, the communication device may have the functions of some or all of the embodiments in this disclosure, or it may have the functions of implementing any one embodiment of this disclosure individually. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0008] Optionally, in one embodiment of this disclosure, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions in the above-described methods. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module, and stores the necessary computer programs and data of the communication device.

[0009] As an example, the processing module can be a processor, the transceiver module can be a transceiver or a communication interface, and the storage module can be a memory.

[0010] Fourthly, embodiments of this disclosure provide another communication device that has some or all of the functions of the second terminal in the method example of the second aspect described above. For example, the communication device may have the functions of some or all of the embodiments in this disclosure, or it may have the functions of implementing any one embodiment of this disclosure individually. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0011] Optionally, in one embodiment of this disclosure, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions in the methods described above. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module, and stores the computer programs and data necessary for the communication device.

[0012] Fifthly, embodiments of this disclosure provide a communication device including a processor, which executes the information transmission method described in the first aspect when it invokes a computer program in memory.

[0013] In a sixth aspect, embodiments of this disclosure provide a communication device including a processor, which executes the information receiving method described in the second aspect when the processor invokes a computer program in memory.

[0014] In a seventh aspect, embodiments of this disclosure provide a communication device including a processor and a memory, the memory storing a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the information transmission method described in the first aspect.

[0015] Eighthly, embodiments of this disclosure provide a communication device including a processor and a memory, the memory storing a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the information receiving method described in the second aspect.

[0016] Ninthly, embodiments of this disclosure provide a communication device including a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to execute the code instructions to cause the device to perform the information transmission method described in the first aspect.

[0017] In a tenth aspect, embodiments of this disclosure provide a communication device including a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor, which is used to execute the code instructions to cause the device to perform the information receiving method described in the second aspect.

[0018] Eleventhly, embodiments of this disclosure provide a communication device, including: one or more processors; wherein the processor is configured to invoke instructions to cause the communication device to execute the above-described information sending method and information receiving method.

[0019] In a twelfth aspect, embodiments of this disclosure provide a communication system, which includes a communication device of the third aspect, a communication device of the fourth aspect, or a communication device of the fifth aspect, a communication device of the sixth aspect, or a communication device of the seventh aspect, a communication device of the eighth aspect, or a communication device of the ninth aspect, a communication device of the tenth aspect.

[0020] In a thirteenth aspect, embodiments of this disclosure provide a computer-readable storage medium for storing instructions for use by the first terminal and the second terminal described above. When the instructions are executed, the first terminal performs the information sending method described above, and the second terminal performs the information receiving method described above.

[0021] In a fourteenth aspect, this disclosure also provides a computer program product including a computer program, which, when run on a computer, causes the computer to perform the above-described information sending and receiving methods.

[0022] In a fifteenth aspect, this disclosure provides a chip system including at least one processor and an interface for supporting a first terminal in implementing the functions involved in the first aspect, such as determining or processing at least one of the data and information involved in the above methods.

[0023] In one possible design, the chip system also includes a memory for storing the computer programs and data necessary for the first terminal. This chip system can be composed of chips or may include chips and other discrete components.

[0024] In a sixteenth aspect, this disclosure provides a chip system including at least one processor and an interface for supporting a second terminal in implementing the functions involved in the second aspect, such as determining or processing at least one of the data and information involved in the above methods.

[0025] In one possible design, the chip system also includes a memory for storing the computer programs and data necessary for the second terminal. This chip system can be composed of chips or may include chips and other discrete components.

[0026] In a seventeenth aspect, this disclosure provides a computer program that, when run on a computer, causes the computer to perform the aforementioned information sending and receiving methods.

[0027] In summary, the information sending and receiving methods, apparatus, devices, chip systems, storage media, computer programs, and computer program products provided in the embodiments of this disclosure can achieve the following technical effects:

[0028] When the first terminal determines that the first condition is met, it sends additional information to the second terminal via unicast, which can effectively support the sending of additional information. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments or background art of this disclosure, the accompanying drawings used in the embodiments or background art of this disclosure will be described below.

[0030] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure;

[0031] Figure 2 This is a flowchart illustrating an information sending method provided in an embodiment of this disclosure;

[0032] Figure 3 This is a flowchart illustrating an information sending method provided in an embodiment of this disclosure;

[0033] Figure 4 This is a flowchart illustrating an information sending method provided in an embodiment of this disclosure;

[0034] Figure 5 This is a flowchart illustrating another information sending method provided in an embodiment of this disclosure;

[0035] Figure 6 This is a flowchart illustrating an information receiving method provided in an embodiment of this disclosure;

[0036] Figure 7 This is a flowchart illustrating another information receiving method provided in an embodiment of this disclosure;

[0037] Figure 8 This is a flowchart illustrating an information interaction method provided in an embodiment of this disclosure;

[0038] Figure 9 This is a flowchart illustrating another information interaction method provided in an embodiment of this disclosure;

[0039] Figure 10 This is a flowchart illustrating another information interaction method provided in an embodiment of this disclosure;

[0040] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure;

[0041] Figure 12 This is a schematic diagram of another communication device provided in an embodiment of this disclosure;

[0042] Figure 13 This is a schematic diagram of the chip structure according to an embodiment of the present disclosure. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this disclosure as detailed in the appended claims.

[0044] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0045] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the words “if” and “suppose” as used herein may be interpreted as “when”, “when”, or “in response to a determination”.

[0046] To facilitate understanding, the terminology used in this disclosure will be introduced first.

[0047] 1. ProSe-enabled Public Safety UE: A user equipment UE whose Home Public Land Mobile Network (HPLMN) is authorized for public safety use, enables ProSe, and supports public safety-specific ProSe procedures and functions.

[0048] 2. ProSe UE-to-Network Relay is a terminal that provides functionality to support remote terminals connecting to the network.

[0049] 3. Relay Service Code (RSC): This code identifies the connection services provided by the ProSe UE-to-network Relay and the authorized users to whom the ProSe UE-to-network Relay will provide services. It also allows for the selection of relevant security policies or information, such as information necessary for authentication and authorization between the remote UE and the ProSe UE-to-network Relay.

[0050] 4. Remote UE refers to a remote terminal. A remote UE is a terminal that supports ProSe. In 4G, a remote terminal can establish a connection with the 4G network through a nearby serving user equipment to the network relay and communicate with the Public Data Network (PDN). In 5G, a remote terminal can establish a connection with the 5G network through a nearby serving user equipment to the network relay and communicate with the Data Network (DN).

[0051] 5. Indirect Network Communication refers to a network communication mode, such as a user equipment to network relay between the UE and the 5G network.

[0052] 6. 5G ProSe UE-to-Network Relay is a terminal that provides functionality to support remote terminals connecting to the network.

[0053] In one embodiment of this disclosure (e.g., mode A), a neighboring serving user equipment (NSU) can broadcast its own terminal information to other terminals for use, and a remote terminal detects relevant messages to discover the neighboring NSU. In another embodiment (e.g., mode B), a remote terminal can send other terminal information that it expects to receive a response to based on a request, that is, initiate a neighboring NSU discovery request for the requested neighboring NSU. The neighboring NSU that meets the conditions responds to the corresponding request. Mode A can also be referred to as the first mode, and mode B can also be referred to as the second mode. That is to say, the first mode is the mode of broadcasting its own terminal information to other terminals for use, and the second mode is the mode of sending other terminal information that it expects to receive a response to based on a request. The descriptions of the first mode and the second mode in the following embodiments can be referred to in this paragraph.

[0054] In related technologies, additional information is sent based on mode A. If the remote terminal only supports mode B (in mode B, the terminal can send other terminal information that it expects to receive a response to based on a request), the additional information cannot be effectively obtained. If the remote terminal only supports mode A but does not request additional information, it will cause unnecessary instruction consumption and cannot support the effective sending of additional information.

[0055] This embodiment of the present disclosure aims to solve the technical problem in the related art that it cannot effectively send additional information when mode A is not used, and provides an information sending method that can effectively send additional information by sending additional information to a second terminal based on unicast when a first condition is met.

[0056] To better understand the information sending method disclosed in this embodiment, the communication system to which this embodiment applies is first described below.

[0057] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and two terminals, wherein... Figure 1 The number and form of devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of this disclosure. In actual applications, two or more network devices and two or more terminals may be included. Figure 1 The communication system shown is exemplified by a network device 11 and two terminals 12 and 13. Terminal 12 can provide relay functionality for terminal 13. An optional example of terminal 12 can be a ProSe UE-to-NetworkRelay, and an optional example of terminal 13 can be a remote terminal.

[0058] In this disclosure, terminal 12 can be a sending end, and terminal 13 can be a peer terminal. Terminal 13 can be one or more, and this disclosure does not limit this. Alternatively, terminal 13 can be a sending end, and terminal 12 can be a peer terminal. Terminal 12 can be one or more, and this disclosure does not limit this.

[0059] It should be noted that the technical solutions of this disclosure can be applied to various communication systems. For example, Long Term Evolution (LTE) systems, 5th Generation (5G) mobile communication systems, 5G New Radio (NR) systems, or other future new mobile communication systems.

[0060] The network device 11 in this embodiment is a network-side entity used for transmitting or receiving signals. The network device 11 can be a core network device or an access network device. Core network devices include, for example, location management function (LMF) network elements, access and mobility management function (AMF) network elements, policy control function (PCF) network elements, etc. Access network devices include, for example, evolved NodeBs (eNBs), transmission reception points (TRPs), next-generation NodeBs (gNBs) in NR systems, base stations in other future mobile communication systems, or access nodes in wireless fidelity (WiFi) systems. This disclosure does not limit the specific technologies or device forms used in the network devices.

[0061] In this disclosure, the terminal is a user-side entity used to receive or transmit signals, such as a mobile phone. The terminal can also be called a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal can be a car with communication capabilities, a smart car, a vehicle-to-everything (V2X) device, a mobile phone, a wearable device, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on. This disclosure does not limit the specific technology or device form used in the terminal.

[0062] It is understood that the communication system described in the embodiments of this disclosure is for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and does not constitute a limitation on the technical solutions provided in the embodiments of this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this disclosure are also applicable to similar technical problems.

[0063] In this embodiment of the disclosure, the additional information may be, for example, additional information, and may also be referred to as additional parameters, without limitation.

[0064] The information transmission method and apparatus provided in this disclosure will now be described in detail with reference to the accompanying drawings. Figure 2 This is a flowchart illustrating an information transmission method provided in an embodiment of this disclosure, which is executed by a first terminal. The information transmission method in this embodiment can be applied to a first terminal, which may be, for example, a Proximity Serving User Equipment-to-Network Relay, or a mobile phone, tablet, smartwatch, smart car, or vehicle-to-everything (V2X) device, etc., without limitation.

[0065] like Figure 2 As shown, the method may include, but is not limited to, the following steps:

[0066] S201: If the first condition is met, send additional information to the second terminal using unicast.

[0067] In some embodiments, the first condition may be, for example, a triggering condition, or a threshold condition for triggering the sending of additional information to the second terminal via unicast. The first condition may be a triggering condition for triggering the sending of additional information to the second terminal via unicast. For example, when the first terminal determines that the first condition is met, it can trigger the sending of additional information to the second terminal via unicast. There is no limitation on this.

[0068] In some embodiments, the first condition may be a pre-set condition, such as a system protocol setting, or it may be any other possible form of condition, without limitation.

[0069] In some embodiments, the second terminal is, for example, a remote terminal or a Remote UE, and there are no restrictions on this.

[0070] In some embodiments, the first terminal may periodically send additional information to the second terminal, and there is no restriction on this.

[0071] The information transmission method in this embodiment can support both Mode A and Mode B, meaning that there is no limitation on the mode type (e.g., whether it is Mode A or Mode B) supported by the first terminal and / or the second terminal.

[0072] In some embodiments, the first terminal may send additional information periodically, or when the first terminal detects new or updated additional information, or when new or updated additional information is generated but cannot be sent to the second terminal, the first terminal may send additional information to the second terminal, without limitation.

[0073] In some embodiments, the relay terminal (an optional example of the first terminal) sends additional information or updated additional information to the remote terminal (an optional example of the second terminal) via unicast, without limitation.

[0074] In some embodiments, unicast mode may be referred to as unicast transmission mode. Unicast transmission refers to the establishment of a point-to-point network connection between the sender and each receiver. Optional examples include responses to additional information requests, new requests, and Mode B mode discovery responses, without limitation.

[0075] In some embodiments, the first terminal can detect whether a first condition is met. If the first condition is met, additional information can be sent to the second terminal via unicast.

[0076] Therefore, since the first terminal detects whether the first condition is met, and if the first condition is met, it sends additional information to the second terminal based on unicast. Since it can simultaneously support both Mode A and Mode B, and achieve on-demand sending based on unicast to save sending costs, and triggers the sending of additional information when the first condition is met, it can improve the timeliness of sending additional information and support the effective sending of additional information.

[0077] The information transmission method provided in this disclosure includes one or more of the following additional information: Temporary Mobile Group Identity (TMGI), Cell Global Identifier (CGI), and Tracking Area Identity (TAI), in order to improve the comprehensiveness of the additional information coverage.

[0078] The information transmission method provided in this disclosure may further include one or more of the following: Temporary Mobile Group Identity (TMGI), Evolved-Universal Mobile Communications System Terrestrial Radio Access Network Cell Global Identifier (ECGI), New Radio Cell Global Identifier (NCGI), and TAI, to improve the comprehensiveness of the coverage of the additional information.

[0079] Of course, the additional information may also include any other possible information that can be used to assist in neighbor service communication, without any limitation.

[0080] In some embodiments, in a long term evolution (LTE) network, the access network portion is referred to as the evolved UMTS terrestrial radio access network (E-UTRAN), which is the mobile radio network in LTE, without limitation.

[0081] The information sending method provided in this disclosure, upon determining that a first condition is met, may include one or more of the following: obtaining additional information; obtaining updated additional information; not configuring a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; receiving a first request message sent by a second terminal, wherein the first request message is used to request obtaining additional information and / or instruct the first terminal on the method of sending additional information; receiving a second request message sent by the second terminal, wherein the second request message is used to request sending additional information to the second terminal in a unicast manner; receiving a third request message sent by a third terminal, wherein the third request message is at least used to instruct the sending of additional information to the second terminal. This enables on-demand sending and improves the timeliness and accuracy of additional information sending.

[0082] In some embodiments, when the first terminal obtains additional information or updated additional information, it can trigger the sending of additional information or updated additional information to the second terminal. Obtaining additional information or updated additional information may, for example, mean that the first terminal detects new additional information or updated additional information, and there is no limitation on this.

[0083] In some embodiments, the first terminal may interact with the network to detect additional information or updated additional information, without limitation.

[0084] In some embodiments, the 5G ProSe UE-to-Network Relay detects new parameter(s), where the 5G ProSe UE-to-Network Relay is an optional example of a first terminal, and the 5G ProSe UE-to-Network Relay can detect one or more new parameters (an optional example of additional information), without limitation.

[0085] In some embodiments, when the first terminal obtains new and / or updated additional information, it may send additional information (e.g., new and / or updated additional information) to the second terminal via unicast, without limitation.

[0086] In some embodiments, the first terminal may send new and / or updated additional information to the second terminal at least once via unicast, without limitation.

[0087] In some embodiments, when the duration since the first terminal detected that new or updated additional information has been sent reaches the sending cycle, it may trigger the sending of new or updated additional information to the second terminal, without limitation.

[0088] In some embodiments, the transmission period can be preconfigured, and the transmission period can be determined based on a configurable transmission frequency. For example, the frequency can be preconfigured, and the transmission period can be determined based on the configured frequency. There are no restrictions on this.

[0089] In some embodiments, when the first terminal determines that it has not configured the first mode, it can send additional information to the second terminal via unicast. The first mode is a mode that broadcasts information of the terminal for use by other terminals. For example, the first mode is mode A. In the first mode, the terminal can broadcast its own information for use by other terminals without limitation.

[0090] In some embodiments, after receiving a first request message from a second terminal, the first terminal may send additional information to the second terminal via unicast. The first request message is used to request additional information and / or to indicate to the first terminal the method of sending the additional information, and there are no restrictions on this.

[0091] The first request message can be, for example, an Additional parameters Announcement Request. An Additional parameters Announcement Request can be used to request additional parameters, which can also be called additional information, and there is no restriction on this.

[0092] In some embodiments, after receiving the second request message sent by the second terminal, the first terminal may send additional information to the second terminal in a unicast manner. The second request message is used to request that additional information be sent to the second terminal in a unicast manner, thereby responding to the request and sending additional information to the second terminal in a unicast manner. There are no restrictions on this.

[0093] The second request message can be a new request message used to request that additional information be sent to the second terminal in a unicast manner. The second request message can be, for example, an Additional parameters Request, and there are no restrictions on this.

[0094] In some embodiments, after receiving a third request message from a third terminal, the first terminal may send additional information to the second terminal via unicast. The third request message is used at least to indicate that additional information should be sent to the second terminal, and there is no limitation on this.

[0095] The third terminal can be, for example, other remote terminals. In other words, the number of remote terminals can be one or more. The first terminal can send additional information to at least one of the remote terminals. This can be triggered by other remote terminals and additional information can be sent to one of the remote terminals without restriction.

[0096] In some embodiments, a message sent by another remote terminal to instruct the sending of additional information to a second terminal may be referred to as a third request message, and there is no limitation thereto.

[0097] In some embodiments, the third terminal may be, for example, other remote UEs, and the second terminal may be, for example, a remote UE or an initiating UE (UE that initiates additional information requests), without limitation.

[0098] In some embodiments, the third request message may also include a method for sending additional information. In one method, additional information can be sent to all remote terminals via unicast. If the first terminal receives the third request message and determines that the third request message indicates that additional information should be sent to all remote terminals, it can send additional information to at least the second terminal via unicast without limitation.

[0099] Figure 3 This is a flowchart illustrating an information transmission method provided in an embodiment of this disclosure, which is executed by a first terminal. The information transmission method in this embodiment can be applied to the first terminal, which can be, for example, a ProSe UE-to-Network Relay, and is not limited thereto.

[0100] like Figure 3 As shown, the method may include, but is not limited to, the following steps:

[0101] S301: Receive a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information.

[0102] In some embodiments, the first terminal may respond to a request by sending additional information to the second terminal via unicast. For example, the first terminal may respond to a first request message sent by the second terminal by sending additional information to the second terminal via unicast, thereby enabling on-demand sending of additional information via unicast to save on transmission costs.

[0103] The first request message can be, for example, an Additional parameters Announcement Request. An Additional parameters Announcement Request can be used to request additional parameters, which can also be called additional information, and there is no restriction on this.

[0104] In some embodiments, the first request message may be used to request additional information, or it may be used to indicate to the first terminal the subsequent method of sending the additional information, or it may be used to request additional information and indicate to the first terminal the subsequent method of sending the additional information, without limitation.

[0105] In some embodiments, the sending method refers to the way in which the first terminal subsequently sends additional information to other remote terminals. The sending method may be indicated by one of the remote terminals, and the sending method may also be called the provisioning method, without limitation.

[0106] S302: If the first condition is met, send additional information to the second terminal using unicast.

[0107] In some embodiments, the first terminal may determine whether the first condition is met based on the triggering of the first request message sent by the second terminal, and if the first condition is met, send additional information to the second terminal in a unicast manner, without limitation.

[0108] Therefore, in this embodiment, by receiving a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate the method of sending additional information to the first terminal, and when it is determined that the first condition is met, additional information is sent to the second terminal based on unicast, thereby realizing on-demand sending based on unicast, saving sending consumption and effectively improving the sending effect of additional information.

[0109] The information sending method provided in this embodiment of the present disclosure may also allow the first terminal to receive a third request message sent by a third terminal. The third request message is used to instruct the sending of additional information to the second terminal, to request the acquisition of additional information, and to instruct the first terminal on the method of sending additional information, so as to support timely sending of additional information to the second terminal.

[0110] The third request message can be, for example, an Additional parameters Announcement Request sent by a third terminal to a first terminal. The Additional parameters Announcement Request can be used to request additional parameters, instruct the first terminal on how to send additional information, and instruct the second terminal to send additional information. The additional parameters can also be referred to as additional information, and there is no restriction on this.

[0111] The information sending method provided in this disclosure embodiment may include at least one of the following methods: sending additional information to a second terminal via unicast; sending additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; sending additional information to all terminals using the same RSC based on a discovery process of a second mode, wherein the second mode is a mode of sending information of other terminals that expect to receive a response based on a request; sending additional information to all terminals using the same RSC based on the discovery processes of the first and second modes can significantly improve the flexibility of sending additional information and can be effectively applied to personalized communication scenario requirements.

[0112] In some embodiments, sending additional information to the second terminal via unicast can be, for example, providing the additional parameters to the initiating UE with unicast only. The initiating UE (the terminal that initiates the additional information request) is an optional example of the second terminal and is not limited thereto.

[0113] In some embodiments, based on the discovery procedure of the first mode, additional information is sent to all terminals using the same relay service code (RSC). This may be, for example, provisioning the additional parameters to all the UEs using the same RSC with the Mode A discovery procedure only, and there is no limitation thereto.

[0114] In some embodiments, the discovery process can also be based on the second mode, sending additional information to all terminals using the same RSC. The second mode is a mode based on requesting to send information about other terminals that expect to receive a response, and there are no restrictions on this.

[0115] In some embodiments, based on the discovery process of the first mode and the second mode, additional information is sent to all terminals using the same RSC. This may be, for example, provisioning the additional parameters to all the UEs using the same RSC with Mode A and Mode B procedures triggered. There are no limitations on this.

[0116] Figure 4 This is a flowchart illustrating an information transmission method provided in an embodiment of this disclosure, which is executed by a first terminal. The information transmission method in this embodiment can be applied to the first terminal, which can be, for example, a ProSe UE-to-Network Relay, and is not limited thereto.

[0117] like Figure 4 As shown, the method may include, but is not limited to, the following steps:

[0118] S401: Receive a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information.

[0119] S402: If the first condition is determined to be met, a response message related to the first request message is sent to the second terminal, wherein the response message is used to send additional information.

[0120] In some embodiments, when the first terminal receives a first request message sent by the second terminal, it may, if it determines that a first condition is met, respond to the first request message by sending a response message related to the first request message to the second terminal, without limitation.

[0121] In some embodiments, the response message may be used to indicate additional information, and there are no limitations on this.

[0122] In some embodiments, the response message may also be used to indicate the timing duration. For a description of the timing duration, please refer to the following embodiments. Alternatively, the response message may also be used to indicate the timing duration and additional information, without limitation.

[0123] In some embodiments, the response message may include or carry additional information, and there are no restrictions on this.

[0124] In some embodiments, the first terminal may decide whether to include additional information in the response message, or the first terminal may determine whether to include additional information in the response message based on the instruction of the second terminal, without limitation.

[0125] S403: Send additional information to the second terminal using unicast.

[0126] It should be noted that in this embodiment of the present disclosure, steps S402 and S403 can be executed separately or together, and the present disclosure does not limit this.

[0127] Therefore, in this embodiment, on-demand transmission based on unicast is implemented to save transmission costs and effectively improve the transmission effect of additional information. Furthermore, the first terminal can promptly send response messages to the second terminal to send additional information based on the response messages, which also effectively improves the comprehensiveness of the indication.

[0128] In the information sending method provided in this disclosure, the first terminal can also indicate a timeout duration to the second terminal, wherein additional information can be sent to the second terminal multiple times before the timeout duration expires.

[0129] In the information transmission method provided in this disclosure, the first terminal can also receive a second request message sent by the second terminal, wherein the second request message is used to request additional information to be sent to the second terminal in a unicast manner, thereby effectively improving the effectiveness and flexibility of the additional information indication.

[0130] The second request message can be a new request message used to request that additional information be sent to the second terminal in a unicast manner. The second request message can be, for example, an Additional parameters Request, and there are no restrictions on this.

[0131] Optionally, the request may include a provisioning method to indicate how the additional parameters are sent, such as sending them only to the terminal that initiated the additional parameter request, or sending them to the terminal that initiated the additional parameter request and other terminals, without any restriction.

[0132] The information sending method provided in this disclosure also allows the first terminal to send a new message to the second terminal, wherein the new message is used to send additional information, thereby saving sending power and improving the sending effect of additional information.

[0133] Figure 5 This is a flowchart illustrating another information transmission method provided in this embodiment, which is executed by a first terminal. The information transmission method in this embodiment can be applied to a first terminal, which can be, for example, a ProSe UE-to-Network Relay, and is not limited thereto.

[0134] like Figure 5 As shown, the method may include, but is not limited to, the following steps:

[0135] S501: If the first condition is met, determine that the duration after receiving the first request message, the second request message, or the third request message has not reached the timed duration.

[0136] For details regarding the explanation and receiving methods of the first, second, or third request message, please refer to the above embodiments, which will not be repeated here.

[0137] In some embodiments, if the duration of receiving the first request message, the second request message, or the third request message does not reach the timed duration, additional information may be sent to the second terminal, and there is no limitation on this.

[0138] S502: Send additional information to the second terminal multiple times according to the sending period, wherein the sending period is shorter than the timing duration.

[0139] In some embodiments, if the duration of receiving the first request message, the second request message, or the third request message does not reach the timed duration, additional information may be sent to the second terminal multiple times via unicast when the first condition is determined to be met, or additional information may be sent to the second terminal multiple times via broadcast when the second condition is determined to be met. The sending period is less than the timed duration. The timed duration is used to time the re-request of the first request message, the second request message, or the third request message, and also to time the sending of additional information from the first terminal to the second terminal. There are no restrictions on this.

[0140] For example, the timing duration could be the duration of the Additional_Parameters_Announcement_Request_Refresh timer, which is used to time the retransmission of Additionalparameters Announcement Requests. This timing duration can be configured by the 5G ProSeUE-to-Network Relay and is not restricted.

[0141] In some embodiments, the Additional_Parameters_Announcement_Request_Refresh timer can be, for example, the Additional_Parameters_Announcement_Request_Refresh Timer, and there is no limitation thereto.

[0142] For example, the timing duration could also be the timing duration of the Additional_Parameters_Refresh timer, which is used to time the retransmission of Additional Parameters Requests. This timing duration can be configured by the 5G ProSe UE-to-Network Relay and is not limited thereto.

[0143] In some embodiments, the Additional_Parameters_Refresh timer can be, for example, an Additional_Parameters_Refresh Timer, and there are no restrictions on this.

[0144] In some embodiments, if the duration of time after the first terminal receives the second request message sent by the second terminal has not reached the set time, the first terminal may send additional information to the second terminal, and there is no restriction on this.

[0145] In some embodiments, the sending period is shorter than the timing duration, which can effectively improve the timeliness and efficiency of sending additional information.

[0146] In some embodiments, the sending period being less than the timing duration can mean providing the additional parameters at a configurable frequency normally higher than the one related to the Additional_Parameters_Announcement_Request_Refresh Timer. That is, the configurable sending frequency (the reciprocal of the configurable sending frequency is the sending period) is usually higher than the frequency associated with the Additional_Parameters_Announcement_Request_Refresh timer, and there is no limitation on this.

[0147] In some embodiments, the transmission period being shorter than the timing duration can mean providing the additional parameters at a configurable frequency normally higher than the one related to the Additional_Parameters_Refresh Timer. That is, the configurable transmission frequency (the reciprocal of the configurable transmission frequency is the transmission period) is usually higher than the frequency associated with the Additional_Parameters_Refresh timer, and there is no limitation on this.

[0148] The information transmission method provided in this disclosure allows the first terminal to send additional information via broadcast if the second condition is met, thereby improving the flexibility and applicability of the additional information indication.

[0149] In some embodiments, the second condition may be, for example, a triggering condition, or a threshold condition for triggering the sending of additional information via broadcast. The second condition may also be, for example, a triggering condition for triggering the sending of additional information via broadcast. For instance, when the first terminal determines that the second condition is met, it can trigger the sending of additional information via broadcast. There are no restrictions on this.

[0150] In some embodiments, the second condition may be a pre-set condition, such as one set based on a system protocol, or it may be any other possible form of condition, without limitation.

[0151] In some embodiments, the second condition may be a trigger condition for sending additional information in a broadcast manner. For example, when any terminal instructs the first terminal to send additional information in a broadcast manner, the first terminal can determine that the second condition is met, and there is no restriction on this.

[0152] The information transmission method provided in this disclosure determines that the second condition is met, including: determining to transmit the additional information in a broadcast manner based on the transmission method of the additional information indicated by the terminal, wherein the terminal is the second terminal or another terminal; and / or the first mode is not configured, which is not limited.

[0153] In some embodiments, if the method of sending additional information indicated by the terminal determines that the additional information is to be sent in a broadcast manner, then the additional information can be sent in a broadcast manner, such as broadcasting the additional information to a second terminal, or sending the additional information to other terminals, such as other remote terminals, without limitation.

[0154] In some embodiments, if the first terminal is not configured with the first mode, additional information can be sent via broadcast, such as broadcasting additional information to the second terminal or sending additional information to other terminals, such as other remote terminals, without limitation.

[0155] It should be noted that in the following embodiments, the descriptions of the same or corresponding methods as in the above embodiments can be referred to the above embodiments as well, and will not be repeated here.

[0156] Figure 6 This is a flowchart illustrating an information receiving method provided in an embodiment of this disclosure, which is executed by a second terminal. The information receiving method in this embodiment can be performed in a terminal, and the second terminal can be, for example, a remote terminal, a remote UE, or an initiating UE (UE that initiates additional information requests), without limitation.

[0157] like Figure 6 As shown, the method may include, but is not limited to, the following steps:

[0158] S601: Receive additional information sent by the first terminal using unicast.

[0159] In some embodiments, if the first terminal determines that the first condition is met, it sends additional information to the second terminal via unicast, and the second terminal can receive the additional information sent by the first terminal via unicast.

[0160] In this embodiment, by receiving additional information sent by the first terminal in a unicast manner, it is possible to effectively receive additional information.

[0161] The information transmission method provided in this disclosure includes one or more of the following additional information: Temporary Mobile Group Identity (TMGI), Cell Global Identifier (CGI), and Tracking Area Identity (TAI), in order to improve the comprehensiveness of the additional information coverage.

[0162] The information transmission method provided in this disclosure may further include one or more of the following: Temporary Mobile Group Identity (TMGI), Evolved-Universal Mobile Communications System Terrestrial Radio Access Network Cell Global Identifier (ECGI), New Radio Cell Global Identifier (NCGI), and TAI, to improve the comprehensiveness of the coverage of the additional information.

[0163] Of course, the additional information may also include any other possible information that can be used to assist in neighbor service communication, without any limitation.

[0164] In some embodiments, in a long term evolution (LTE) network, the access network portion is referred to as the evolved UMTS terrestrial radio access network (E-UTRAN), which is the mobile radio network in LTE, without limitation.

[0165] Figure 7 This is a flowchart illustrating another information receiving method provided in this embodiment, which is executed by a second terminal. The information receiving method in this embodiment can be applied to a second terminal, which can be, for example, a remote terminal, a remote UE, or an initiating UE (UE that initiates additional information requests), and there are no limitations on this.

[0166] like Figure 7 As shown, the method may include, but is not limited to, the following steps:

[0167] S701: Send a first request message to the first terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information.

[0168] S702: Receive additional information sent by the first terminal using unicast.

[0169] In this embodiment, by sending a first request message to the first terminal, wherein the first request message is used to request additional information and / or indicate the method of sending additional information to the first terminal, and to receive additional information sent by the first terminal based on unicast, on-demand sending based on unicast is realized, thereby saving sending consumption and effectively improving the sending effect of additional information.

[0170] The information sending method provided in this embodiment allows a second terminal to receive a response message related to a first request message sent by a first terminal, wherein the response message is used to send additional information.

[0171] For a detailed description of this embodiment, please refer to the above embodiments, which will not be repeated here.

[0172] The information sending method provided in this embodiment allows a second terminal to receive a new message sent by a first terminal, wherein the new message is used to send additional information.

[0173] For a detailed description of this embodiment, please refer to the above embodiments, which will not be repeated here.

[0174] The information transmission method provided in this embodiment allows a second terminal to receive a timing duration indicated by a first terminal.

[0175] For a detailed description of this embodiment, please refer to the above embodiments, which will not be repeated here.

[0176] The information sending method provided in this embodiment allows a second terminal to receive additional information sent multiple times by a first terminal according to a sending period, wherein the sending period is less than the timing duration.

[0177] The information sending method provided in this embodiment sends a second request message to a first terminal, wherein the second request message is used to request additional information to be sent to the second terminal in a unicast manner.

[0178] For a detailed description of this embodiment, please refer to the above embodiments, which will not be repeated here.

[0179] The information sending method provided in this embodiment receives additional information sent by a first terminal in a broadcast manner.

[0180] For a detailed description of this embodiment, please refer to the above embodiments, which will not be repeated here.

[0181] Figure 8This is a flowchart illustrating an information interaction method provided in an embodiment of this disclosure. The method shows an interaction diagram between a first terminal, a second terminal, and a network. In this embodiment, the first terminal can be, for example, a 5G ProSe UE-to-Network Relay, and the second terminal can be, for example, a 5G ProSe Remote UE; there are no limitations on this.

[0182] In this embodiment, the additional parameter request reuses the additional parameter announcement process. It is assumed that the 5G ProSe Remote UE discovers the 5G ProSe UE-to-Network Relay. The 5G ProSe Remote UE can add parameters according to application requirements (the added parameters can be called additional parameters, and additional parameters can also be additional information). Neither the 5G ProSe Remote UE nor the 5G ProSe UE-to-Network Relay is configured with mode A, and there are no restrictions on this.

[0183] like Figure 8 As shown, the method may include, but is not limited to, the following steps:

[0184] S801: The 5G ProSe Remote UE has detected a relay and requires additional parameters.

[0185] In some embodiments, the 5G ProSe Remote UE has discovered a relay and requires additional parameters, which are not limited.

[0186] S802: Send additional parameter announcement request (including the sending method).

[0187] In some embodiments, the Additional Parameters Announcement Request is sent via a provisioning method, for example, without limitation.

[0188] In some embodiments, the 5G ProSe Remote UE can send an Additional parameters Announcement Request to the 5G ProSe UE-to-Network Relay, without limitation.

[0189] In some embodiments, the 5G ProSe Remote UE can send an additional parameter announcement request to the 5G ProSe UE-to-Network Relay to obtain additional parameters. Depending on local configuration or application requirements, the 5G ProSe Remote UE can indicate the method for providing the additional parameters (an optional example of the sending method described above), for example, using one of the following options:

[0190] 1. Provisioning the additional parameters to the initiating UE with unicast only.

[0191] In some embodiments, additional information can be sent to the second terminal via unicast, and there are no restrictions on this.

[0192] 2. Provisioning the additional parameters to all the UEs using thesame RSC with Mode A discovery procedure only.

[0193] In some embodiments, based on the discovery process of the first mode, additional information is sent to all terminals using the same relay service code RSC. The first mode is a mode that broadcasts the terminal's information for use by other terminals, and there are no restrictions on this.

[0194] 3. Provisioning the additional parameters to all the UEs using thesame RSC with Mode A and Mode Bprocedures triggered.

[0195] In some embodiments, additional information is sent to all terminals using the same RSC based on the discovery process of the first mode and the second mode. The second mode is a mode that sends information about other terminals that expect to receive a response based on a request. This is not limited.

[0196] S803: Send additional parameter announcement response.

[0197] In some embodiments, the additional parameters are announced in the response, such as Additional Parameters AnnouncementResponse, and there are no restrictions on this.

[0198] The Additional Parametrs Announcement Response may include:

[0199] Additional_Parameters_Announcement_Request_Refresh Timer;

[0200] Additional parameters (which can contain various types of information)

[0201] In some embodiments, the additional parameter announcement response may include:

[0202] Additional_Parameters: Announcement_Request_Refresh timer; and / or additional parameters, for which there are no restrictions.

[0203] In some embodiments, the 5G ProSe UE-to-Network Relay indicates to the 5G ProSe Remote UE, through an additional parameter announcement response, that it has received the additional parameter announcement request in step S802, and there are no restrictions on this.

[0204] In some embodiments, if the 5G ProSe UE-to-Network Relay provides an Additional_Parameters_Announcement_Request_Refresh Timer to the 5G ProSe Remote UE (which can be configured in the 5G ProSe UE-to-network Relay), it is used as an exit mechanism. When the timer expires, if the 5G ProSe Remote UE still needs to obtain additional parameters, the additional parameter announcement request process is repeated, without limitation.

[0205] In some embodiments, if the 5G ProSe Remote UE does not initiate a new additional parameter announcement request process after the Additional_Parameters_Announcement_Request_Refresh timer expires, and no other terminal requests additional parameter announcements before the Additional_Parameters_Announcement_Request_Refresh timer of the 5G ProSe UE-to-Network Relay expires, then the 5G ProSe UE-to-Network Relay can stop providing additional parameters without restriction.

[0206] In some embodiments, additional parameters may be included in the additional parameters announcement response to provide additional parameters to the 5G ProSe RemoteUE, and there are no restrictions on this.

[0207] In some embodiments, the 5G ProSe UE-to-Network Relay can make a decision based on the indication received from the 5G ProSeRemote UE in S802, including additional parameters in the additional parameter announcement response. For example, the 5G ProSeRemote UE indicates that the additional parameters are provided to the initiating terminal only by unicast, and / or based on local configuration, for example, the 5G ProSe UE-to-Network Relay is not configured with mode A.

[0208] S804: Send relay additional information.

[0209] In some embodiments, relay additional information, such as Relay Additional Information provisioning, is sent; there are no restrictions on this.

[0210] In some embodiments, the 5G ProSe UE-to-Network Relay can send additional information to the 5G ProSe Remote UE, and there are no restrictions on this.

[0211] In some embodiments, the 5G ProSe UE-to-Network Relay provides additional parameters by sending a Relay Additional Information provisioning message, which is not used for Mode A discovery. Instead, it is sent to the unicast communication message that initiated the 5G ProSe Remote UE and is repeated periodically at a configurable transmission frequency (typically higher than the frequency associated with the Additional_Parameters_Announcement_Request_Refresh timer) until no Remote UE requests additional parameters (which can be determined by the Additional_Parameters_Announcement_Request_Refresh timer running in the 5G ProSe UE-to-Network Relay), without limitation.

[0212] S805: 5G ProSe UE-to-Network Relay detected new parameters.

[0213] In some embodiments, the 5G ProSe UE-to-Network Relay detects new parameter(s), which is not limited.

[0214] In some embodiments, the 5G ProSe UE-to-Network Relay detects new or updated additional parameters, and there are no restrictions on this.

[0215] S806: Send relay additional information.

[0216] In some embodiments, relay additional information, such as Relay Additional Information provisioning, is sent; there are no restrictions on this.

[0217] In some embodiments, the 5G ProSe UE-to-Network Relay can send additional information to the 5G ProSe Remote UE multiple times without limitation.

[0218] In some embodiments, if new or updated additional parameters are detected in S805, the 5G ProSe UE-to-Network Relay is triggered to send a Relay Additional Information provisioning message to the 5G ProSe Remote UE requesting additional parameters in real time. This operation can be repeated periodically at a transmission frequency configurable in S804 until no Remote UE requests additional parameters, which is not limited.

[0219] For example, there is no restriction until the Additional_Parameters_Announcement_Request_Refresh Timer expires in the 5GProSe UE-to-Network Relay.

[0220] Figure 9 This is a flowchart illustrating another information interaction method provided in this embodiment, showing an interaction diagram between a first terminal and multiple second terminals. In this embodiment, the first terminal can be, for example, a UE-to-Network Relay, and the second terminals can be, for example, Remote UE-1, Remote UE-2, and Remote UE-3; there are no limitations on this.

[0221] In this embodiment, when both the remote terminal and the relay terminal are configured in mode A, the relay terminal that announces additional information can retrieve the additional information through mode A. To differentiate the methods of providing additional parameters, the relay terminal can make a decision based on input from the remote terminal, without restriction.

[0222] like Figure 9 As shown, the method may include, but is not limited to, the following steps:

[0223] S901: The 5G ProSe Remote UE has detected a relay and requires additional parameters.

[0224] In some embodiments, the 5G ProSe Remote UE has discovered a relay and requires additional parameters, which are not limited.

[0225] S902: Send a request for additional parameters (including the method of sending).

[0226] In some embodiments, the Additional Parameters Announcement Request may be sent via a provisioning method, for example, without limitation.

[0227] In some embodiments, the 5G ProSe Remote UE can send additional parameter announcement requests to the 5G ProSe UE-to-Network Relay without limitation.

[0228] In some embodiments, the provisioning method included in the request is used to indicate how additional parameters are sent, such as sending additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of the first mode.

[0229] S903: Send additional parameter announcement response.

[0230] In some embodiments, the additional parameter announcement response may include:

[0231] Additional_Parameters_Announcement_Request_Refresh Timer,

[0232] That is, the Additional_Parameters_Announcement_Request_Refresh timer, which is not subject to any restrictions.

[0233] In some embodiments, the additional parameters are announced in the response, such as Additional Parameters AnnouncementResponse, and there are no restrictions on this.

[0234] The Additional Parametrs Announcement Response may include:

[0235] Additional_Parameters_Announcement_Request_Refresh Timer.

[0236] S904a: Decision on Additional Information Announcement.

[0237] In some embodiments, the Additional Information Announcement Decision is, for example, an Additional Information Announcement Decision, and there are no restrictions on this.

[0238] In some embodiments, the (UE-to-Network Relay) may decide to send additional information announcements, and there are no restrictions on this.

[0239] S904b: Additional information discovered regarding UE-to-Network Relay.

[0240] In some embodiments, UE-to-Network Relay discovers additional information, such as UE-to-NetworkRelay Discovery Additional Information, and there is no limitation thereto.

[0241] In some embodiments, additional information can be discovered from the user equipment to the network relay, and there are no restrictions on this.

[0242] In some embodiments, additional parameters may be included in a relay discovery additional information message announced by the UE-to-Network Relay triggered by an additional parameter request from one of the remote terminals, and there are no restrictions on this.

[0243] In some embodiments, the UE-to-Network Relay may decide to announce additional parameters using mode A based on an indication received in S902 from a request from the 5G ProSe Remote UE (e.g., the remote UE indicates to provide additional parameters to the initiating UE in mode A) and based on local configuration (e.g., the relay is not configured with mode A), without limitation.

[0244] Figure 10This is a flowchart illustrating another information interaction method provided in this embodiment, showing the interaction between a first terminal, a second terminal, and a network. In this embodiment, the first terminal can be, for example, a 5G ProSe UE-to-Network Relay, and the second terminal can be, for example, a 5G ProSe Remote UE; there are no limitations on this.

[0245] In this embodiment, it is assumed that a 5G ProSe Remote UE discovers a 5G ProSe UE-to-NetworkRelay and can obtain additional parameters (or additional information) according to the application request without restriction.

[0246] In this embodiment, the 5G ProSe Remote UE can be an additional parameter requested by unicast through a new procedure, and there are no restrictions on this.

[0247] like Figure 10 As shown, the method may include, but is not limited to, the following steps:

[0248] S1001: The 5G ProSe Remote UE has detected a relay and requires additional parameters.

[0249] In some embodiments, the 5G ProSe Remote UE has discovered a relay and requires additional parameters, which are not limited.

[0250] S1002: Send additional parameter request.

[0251] In some embodiments, additional parameter requests, such as Additional Parameters Requests, are not limited to this.

[0252] In some embodiments, the 5G ProSe Remote UE sends an Additional Parameters Request to the 5G ProSe UE-to-Network Relay to obtain additional parameters. Unlike the Additional Parameters Announcement Request message in related technologies, this Additional Parameters Request is only used for unicast requests for additional parameters and is not restricted in this regard.

[0253] Optionally, the request may include a provisioning method to indicate how the additional parameters are sent, such as sending them only to the terminal that initiated the additional parameter request, or sending them to the terminal that initiated the additional parameter request and other terminals, without any restriction.

[0254] S1003: Send additional parameter response.

[0255] In some embodiments, the additional parameter response, such as the Additional Parameters Response, is not limited to this.

[0256] In some embodiments, the additional parameter response may include: the Additional_Parameters_Refresh timer, and the additional parameters may contain a variety of information, without limitation.

[0257] In some embodiments, the Additional Parametrs Response may include:

[0258] Additional_Parameters_Refresh Timer;

[0259] Additional parameters (which can contain various types of information)

[0260] In some embodiments, Additional Parameters Response is used, and there are no restrictions on this.

[0261] In some embodiments, the Additional Parameters Response may include an Additional_Parameters_Refresh timer and / or additional parameters, without limitation.

[0262] In some embodiments, the 5G ProSe UE-to-Network Relay indicates receipt of the request in S1002 via an AdditionalParameters Response (which may include an Additional_Parameters_Refresh timer and / or additional parameters), without limitation.

[0263] In some embodiments, if an Additional_Parameters_Refresh timer (which can be configured in the 5G ProSe UE-to-network Relay) is provided to the 5G ProSe Remote UE, it is used as follows: when the Additional_Parameters_Refresh timer expires, if the 5G ProSe Remote UE still needs to obtain additional parameters, the additional parameter request process can be repeated without restriction.

[0264] In some embodiments, if the Additional_Parameters_Refresh timer expires and the 5G ProSeRemote UE does not initiate a new additional parameter announcement request process, the 5G ProSe UE-to-Network Relay stops issuing additional parameters, without any restriction.

[0265] In some embodiments, additional parameters may be included in the additional parameter response message to provide additional parameters to the initiating terminal, and there are no restrictions on this.

[0266] S1004: Send relay additional information.

[0267] In some embodiments, relay additional information is sent, for example via Relay Additional Information provisioning, and there are no restrictions on this.

[0268] In some embodiments, Relay Additional Information provisioning, such as relaying additional information messages, is not limited.

[0269] In some embodiments, the 5G ProSe UE-to-Network Relay provides additional parameters by sending relay additional information messages. These messages can be unicast communication messages sent to the initiating remote UE (e.g., a 5G ProSe Remote UE sending an Additional ParametersRequest), repeated periodically at a configurable transmission frequency (which can be higher than the frequency associated with the Additional_Parameters_Refresh timer) until the Additional_Parameters_Refresh timer expires, or until no Remote UE requests additional parameters, which can be determined by the Additional_Parameters_Refresh timer running in the 5G ProSe UE-to-Network Relay, without limitation.

[0270] S1005: 5G ProSe UE-to-Network Relay detects new or updated additional parameters.

[0271] In some embodiments, the 5G ProSe UE-to-Network Relay detects new or updated additional parameters, for example, the 5G ProSe UE-to-Network Relay detects new parameter(s), and there is no limitation on this.

[0272] S1006: Send relay additional information.

[0273] In some embodiments, relay additional information is sent, for example via Relay Additional Information provisioning, and there are no restrictions on this.

[0274] In some embodiments, Relay Additional Information provisioning, such as relaying additional information messages, is not limited.

[0275] In some embodiments, when a new or updated additional parameter is detected in S1005, the 5G ProSe UE-to-Network Relay is triggered to immediately send a relay additional information provision message to the 5G ProSe Remote UE that requested the additional parameter to provide the additional parameter. This operation can be repeated periodically at a transmission frequency configurable in S1004 until the Additional_Parameters_Refresh Timer expires or no UE requests the additional parameter, for example, until the Additional_Parameters_Refresh Timer expires in the 5G ProSe UE-to-Network Relay. There is no limitation on this.

[0276] In some embodiments, after receiving the relay supplementary information, the Remote UE can return a corresponding response message to the Relay UE, and there is no limitation on this.

[0277] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. Figure 11 The communication device 110 shown may include a transceiver module 1101 and a processing module 1102. The transceiver module 1101 may include a sending module and / or a receiving module. The sending module is used to implement the sending function, and the receiving module is used to implement the receiving function. The transceiver module 1101 can implement the sending function and / or the receiving function.

[0278] The communication device 110 can be a terminal (such as the first terminal or the second terminal in the aforementioned method embodiments), a device in the terminal, or a device that can be used in conjunction with the terminal.

[0279] Communication device 110, on the first terminal side, the device includes:

[0280] The transceiver module 1101 is used to send additional information to the second terminal based on unicast when the first condition is met.

[0281] In this embodiment, since the first terminal detects whether the first condition is met, and if the first condition is met, it sends additional information to the second terminal based on unicast. Since it can simultaneously support both Mode A and Mode B, and achieve on-demand sending based on unicast to save sending costs, and triggers the sending of additional information when the first condition is met, it can improve the timeliness of sending additional information and support the effective sending of additional information.

[0282] Communication device 110, on the second terminal side, the device includes:

[0283] The transceiver module 1101 is used to receive additional information sent by the first terminal in a unicast manner.

[0284] In this embodiment, by receiving additional information sent by the first terminal in a unicast manner, it is possible to effectively receive additional information.

[0285] Figure 12 This is a schematic diagram of another communication device provided in an embodiment of this disclosure. The communication device 120 can be a terminal (such as the first terminal or the second terminal in the foregoing method embodiments), or a chip, chip system, or processor that supports the terminal in implementing the above methods. This device can be used to implement the methods described in the above method embodiments, and for details, please refer to the description in the above method embodiments.

[0286] The communication device 120 may include one or more processors 1201. The processor 1201 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal equipment, terminal equipment chip, DU or CU, etc.), execute computer programs, and process data from the computer programs.

[0287] Optionally, the communication device 120 may further include one or more memories 1202, on which computer program 1204 may be stored, and the processor 1201 may store computer program 1203. The processor 1201 executes computer program 1204 and / or computer program 1203 to cause the communication device 120 to perform the method described in the above method embodiments.

[0288] Optionally, the memory 1202 may also store data. The communication device 120 and the memory 1202 may be configured separately or integrated together.

[0289] Optionally, the communication device 120 may also include a transceiver 1205 and an antenna 1206. The transceiver 1205 may be referred to as a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transmission and reception functions. The transceiver 1205 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to implement the transmitting function.

[0290] Optionally, the communication device 120 may further include one or more interface circuits 1207. The interface circuits 1207 are used to receive code instructions and transmit them to the processor 1201. The processor 1201 executes the code instructions to cause the communication device 120 to perform the methods described in the above method embodiments.

[0291] In one implementation, the processor 1201 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0292] In one implementation, processor 1201 may store computer program 1203, which runs on processor 1201 and causes communication device 120 to perform the methods described in the above method embodiments. Computer program 1203 may be embedded in processor 1201, in which case processor 1201 may be implemented in hardware.

[0293] In one implementation, the communication device 120 may include circuitry capable of performing the functions of transmitting, receiving, or communicating as described in the aforementioned method embodiments. The processor and transceiver described in this disclosure can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal-oxide-semiconductor (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal-oxide-semiconductor (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon-germanium (SiGe), gallium arsenide (GaAs), etc.

[0294] The communication device described in the above embodiments may be a terminal (such as the first terminal and the second terminal in the foregoing method embodiments), but the scope of the communication device described in this disclosure is not limited thereto, and the structure of the communication device may vary. Figure 12 The communication device can be a standalone device or part of a larger device. For example, the communication device can be:

[0295] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0296] (2) A collection of one or more ICs, optionally including storage components for storing data and computer programs;

[0297] (3) ASIC, such as modem;

[0298] (4) Modules that can be embedded in other devices;

[0299] (5) Receivers, terminal equipment, smart terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.

[0300] (6) Others, etc.

[0301] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 13 , Figure 13 This is a schematic diagram of the chip structure according to an embodiment of this disclosure. Figure 13 The chip shown includes a processor 1301 and an interface 1302. There can be one or more processors 1301, and multiple interfaces 1302.

[0302] For cases where the chip is used to implement the functions of the terminal (such as the first terminal and the second terminal in the aforementioned method embodiments) in this disclosure:

[0303] Processor 1301 is used to implement the above. Figures 2-10 Each step in the process, etc.

[0304] Optionally, the chip also includes a memory 1303, which is used to store necessary computer programs and data.

[0305] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this disclosure can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this disclosure.

[0306] This disclosure also provides a communication system, which includes a communication device serving as a terminal (such as the first terminal or the second terminal in the aforementioned method embodiments), or the system includes the aforementioned... Figure 12The communication device in the embodiment serves as a terminal (such as the first terminal and the second terminal in the aforementioned method embodiments).

[0307] This disclosure also provides a readable storage medium having instructions stored thereon that, when executed by a computer, implement the functions of any of the above method embodiments.

[0308] This disclosure also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0309] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0310] Those skilled in the art will understand that the various numerical designations such as "first," "second," etc., used in this disclosure are merely for the convenience of description and are not intended to limit the scope of the embodiments of this disclosure, nor do they indicate the order of events.

[0311] At least one of the features described in this disclosure can also be described as one or more, and multiple features can be two, three, four or more, and this disclosure does not impose any limitations. In the embodiments of this disclosure, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no sequential order or size order among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0312] The correspondences shown in the tables of this disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values; this disclosure is not limiting. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, the correspondences shown in some rows of the tables in this disclosure may not be configured. Furthermore, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the headers of the above tables can also use other names that the communication device can understand, and the values ​​or representations of the parameters can also be other values ​​or representations that the communication device can understand. In the implementation of the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables, etc.

[0313] The predefined terms in this disclosure can be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0314] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0315] In the various embodiments disclosed herein, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0316] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0317] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0318] In the embodiments disclosed herein, "multiple" refers to two or more.

[0319] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0320] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0321] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0322] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0323] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0324] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0325] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0326] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriberstation, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, and client can be used interchangeably.

[0327] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures that replace communication between access network devices, core network devices, or network devices and terminals with communication between multiple terminals (e.g., also referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, uplink link, downlink link, etc., can be replaced with sidelink link.

[0328] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0329] In some embodiments, determining can be interpreted as judging, deciding, judging, calculating, computing, processing, deriving, investigating, searching, looking up, searching, querying, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these.

[0330] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented 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 this disclosure.

[0331] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0332] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for sending information, characterized in that, The method, executed by a first terminal, includes: If the first condition is met, additional information is sent to the second terminal via unicast. Both the first terminal and the second terminal support at least one of the first mode and the second mode. The first mode is a mode that broadcasts information of this terminal for use by other terminals. The second mode is a mode that sends information of other terminals that expect to receive a response based on a request. The first terminal indicates the timing duration to the second terminal; The step of sending additional information to the second terminal includes: If the timed duration has not expired, additional information is sent to the second terminal multiple times, wherein the sending period of the additional information is shorter than the timed duration; The additional information includes at least one of the following: Temporary Mobile Group Identifier (TMGI); Cell Global Identifier (CGI); Tracking area identifier (TAI); The determination that the first condition is met includes at least one of the following: Additional information was obtained; Received updated additional information; The first mode is not configured; Upon receiving a first request message from the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information, the method of sending refers to the way in which the first terminal subsequently sends the additional information to other remote terminals, the method of sending includes at least one of the following: sending the additional information to the second terminal via unicast; sending the additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; sending the additional information to all terminals using the same RSC based on a discovery process of a second mode, wherein the second mode is a mode of requesting to send information of other terminals that expect to receive a response; and sending the additional information to all terminals using the same RSC based on a discovery process of the first mode and the second mode. The second request message sent by the second terminal is received, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner; A third request message is received from a third terminal, wherein the third request message is at least used to instruct the second terminal to send additional information.

2. The method as described in claim 1, characterized in that, The method further includes: The system receives a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information.

3. The method as described in claim 1, characterized in that, The method further includes: The system receives a second request message sent by the second terminal, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner.

4. The method as described in claim 1, characterized in that, The method further includes: The system receives a third request message sent by the third terminal, wherein the third request message is used to instruct the system to send additional information to the second terminal, request to obtain additional information, and instruct the system to send additional information to the first terminal.

5. The method as described in claim 1 or 2, characterized in that, The method further includes: Send a response message related to the first request message to the second terminal, wherein the response message is used to send additional information.

6. The method as described in claim 1 or 2, characterized in that, The method further includes: A new message is sent to the second terminal, wherein the new message is used to send the additional information.

7. The method as described in claim 1, characterized in that, The method further includes: If the second condition is met, additional information is sent via broadcast.

8. The method as described in claim 7, characterized in that, The determination that the second condition is met includes at least one of the following: Based on the method of sending additional information indicated by the terminal, it is determined that the additional information will be sent in a broadcast manner, wherein the terminal is the second terminal or another terminal; First mode not configured.

9. The method as described in claim 1, characterized in that, The sending of additional information to the second terminal includes: It is determined that the duration following the receipt of the first request message, the second request message, or the third request message has not reached the specified timeout duration. Additional information is sent to the second terminal multiple times according to the sending period, wherein the sending period is shorter than the timing duration.

10. An information receiving method, characterized in that, The method, executed by a second terminal, includes: The system receives additional information sent by the first terminal in a unicast manner when it is determined that the first condition is met. The first terminal and the second terminal both support at least one of the first mode and the second mode. The first mode is a mode in which the terminal broadcasts its own information for use by other terminals. The second mode is a mode in which the terminal sends information to other terminals that expect to receive a response based on a request. The timing duration indicated by the first terminal; Wherein, if the first terminal determines that the timed duration has not expired, it sends additional information to the second terminal multiple times, wherein the sending period of the additional information is shorter than the timed duration; The additional information includes at least one of the following: Temporary Mobile Group Identifier (TMGI); Cell Global Identifier (CGI); Tracking area identifier (TAI); The determination that the first condition is met includes at least one of the following: The first terminal obtains additional information; The first terminal receives updated additional information; The first terminal is not configured with the first mode; The first terminal receives a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information, the method of sending refers to the way in which the first terminal subsequently sends the additional information to other remote terminals, the method of sending includes at least one of the following: sending the additional information to the second terminal in a unicast manner; sending the additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; sending the additional information to all terminals using the same RSC based on a discovery process of a second mode, wherein the second mode is a mode of requesting to send information of other terminals that expect to receive a response; sending the additional information to all terminals using the same RSC based on a discovery process of the first mode and the second mode. The first terminal receives a second request message sent by the second terminal, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner; The first terminal receives a third request message sent by the third terminal, wherein the third request message is at least used to instruct the second terminal to send additional information.

11. The method as described in claim 10, characterized in that, The method further includes: Send a first request message to the first terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending additional information.

12. The method as described in claim 10 or 11, characterized in that, The method further includes: The system receives a response message related to the first request message sent by the first terminal, wherein the response message is used to send additional information.

13. The method as described in claim 10, characterized in that, The method further includes: A second request message is sent to the first terminal, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner.

14. The method as described in claim 10 or 11, characterized in that, The method further includes: Receive a new message sent by the first terminal, wherein the new message is used to send the additional information.

15. The method as described in claim 10, characterized in that, The method further includes: Receive additional information sent by the first terminal via broadcast.

16. The method as described in claim 10, characterized in that, The method further includes: The system receives additional information sent multiple times by the first terminal according to a sending period, wherein the sending period is shorter than the timing duration.

17. A communication device, characterized in that, The device includes: The transceiver module is used for the first terminal to send additional information to the second terminal in a unicast manner when the first condition is determined to be met. The first terminal and the second terminal both support at least one of the first mode and the second mode. The first mode is a mode of broadcasting information of this terminal for use by other terminals. The second mode is a mode of sending information of other terminals that expect to receive a response based on a request. The first terminal indicates the timing duration to the second terminal; The step of sending additional information to the second terminal includes: If the timed duration has not expired, additional information is sent to the second terminal multiple times, wherein the sending period of the additional information is shorter than the timed duration; The additional information includes at least one of the following: Temporary Mobile Group Identifier (TMGI); Cell Global Identifier (CGI); Tracking area identifier (TAI); The determination that the first condition is met includes at least one of the following: The first terminal obtains additional information; The first terminal receives updated additional information; The first terminal is not configured with the first mode; The first terminal receives a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information, the method of sending refers to the way in which the first terminal subsequently sends the additional information to other remote terminals, the method of sending includes at least one of the following: sending the additional information to the second terminal in a unicast manner; sending the additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; sending the additional information to all terminals using the same RSC based on a discovery process of a second mode, wherein the second mode is a mode of requesting to send information of other terminals that expect to receive a response; sending the additional information to all terminals using the same RSC based on a discovery process of the first mode and the second mode. The first terminal receives a second request message sent by the second terminal, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner; The first terminal receives a third request message sent by the third terminal, wherein the third request message is at least used to instruct the second terminal to send additional information.

18. A communication device, characterized in that, The device includes: The transceiver module is used to receive additional information sent by the first terminal in a unicast manner when it is determined that the first condition is met. The first terminal and the second terminal both support at least one of the first mode and the second mode. The first mode is a mode of broadcasting information of this terminal for use by other terminals. The second mode is a mode of sending information of other terminals that expect to receive a response based on a request. The timing duration indicated by the first terminal; Wherein, if the first terminal determines that the timed duration has not expired, it sends additional information to the second terminal multiple times, wherein the sending period of the additional information is shorter than the timed duration; The additional information includes at least one of the following: Temporary Mobile Group Identifier (TMGI); Cell Global Identifier (CGI); Tracking area identifier (TAI); The determination that the first condition is met includes at least one of the following: The first terminal obtains additional information; The first terminal receives updated additional information; The first terminal is not configured with the first mode; The first terminal receives a first request message sent by the second terminal, wherein the first request message is used to request additional information and / or indicate to the first terminal the method of sending the additional information, the method of sending refers to the way in which the first terminal subsequently sends the additional information to other remote terminals, the method of sending includes at least one of the following: sending the additional information to the second terminal in a unicast manner; sending the additional information to all terminals using the same Relay Service Code (RSC) based on a discovery process of a first mode, wherein the first mode is a mode of broadcasting information of this terminal for use by other terminals; sending the additional information to all terminals using the same RSC based on a discovery process of a second mode, wherein the second mode is a mode of requesting to send information of other terminals that expect to receive a response; sending the additional information to all terminals using the same RSC based on a discovery process of the first mode and the second mode. The first terminal receives a second request message sent by the second terminal, wherein the second request message is used to request that additional information be sent to the second terminal in a unicast manner; The first terminal receives a third request message sent by the third terminal, wherein the third request message is at least used to instruct the second terminal to send additional information.

19. A communication device, characterized in that, include: One or more processors; The processor is used to invoke instructions to cause the communication device to perform the method of any one of claims 1-9 and 10-16.

20. A communication system, characterized in that, The communication system includes a first terminal and a second terminal, wherein the first terminal performs the method as described in any one of claims 1-9, and the second terminal performs the method as described in any one of claims 10-16.

21. A computer-readable storage medium for storing instructions that, when executed, cause the method of any one of claims 1-16 to be implemented.

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