Method for acquiring relay information, method for transmitting, terminal and storage medium

Abstract

The application provides a relay information acquisition method, a relay information sending method, a terminal and a storage medium, and belongs to the technical field of communication. The relay information acquisition method of the application comprises the following steps: a remote terminal sends a request message to a relay terminal, wherein the request message is used for requesting relay information; and the remote terminal receives a first reply message sent by the relay terminal based on the request message, wherein the first reply message comprises relay information of the relay terminal.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to a method for acquiring relay information, a method for transmitting information, a terminal, and a storage medium. Background Technology

[0002] In relay communication, remote terminals may require relay information from relay terminals to meet their service needs or facilitate their selection of network-side equipment. Currently, relay information is transmitted using Mode A, where relay terminals periodically broadcast relay information. This can lead to situations where some remote terminals do not need the relay information when it is being broadcast, resulting in wasted resources. Summary of the Invention

[0003] This application provides a method for acquiring relay information, a method for sending relay information, a terminal, and a storage medium to solve the problem of resource waste.

[0004] In a first aspect, embodiments of this application provide a method for obtaining relay information, including:

[0005] The remote terminal sends a request message to the relay terminal, the request message being used to request relay information;

[0006] The remote terminal receives a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0007] Secondly, embodiments of this application provide a method for transmitting relay information, including:

[0008] The relay terminal receives a request message sent by the remote terminal, the request message being used to request relay information;

[0009] The relay terminal sends a first reply message to the remote terminal based on the request message. The first reply message includes the relay information of the relay terminal.

[0010] Thirdly, embodiments of this application provide a relay information acquisition device, comprising:

[0011] The sending module is used to send a request message to the relay terminal, the request message being used to request relay information;

[0012] The first receiving module is configured to receive a first reply message sent by the relay terminal based on the request message, wherein the first reply message includes the relay information of the relay terminal.

[0013] Fourthly, embodiments of this application provide a relay information transmitting apparatus, comprising:

[0014] A receiving module is used to receive a request message sent by a remote terminal, the request message being used to request relay information;

[0015] The first sending module is configured to send a first reply message to the remote terminal based on the request message, wherein the first reply message includes the relay information of the relay terminal.

[0016] Fifthly, embodiments of this application provide a remote terminal, including: a memory, a processor, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, they implement the steps in the relay information acquisition method provided in embodiments of this application.

[0017] Sixthly, embodiments of this application provide a terminal, including a processor and a communication interface, wherein the communication interface is used to: send a request message to a relay terminal, the request message being used to request relay information; and receive a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0018] In a seventh aspect, embodiments of this application provide a relay terminal, including: a memory, a processor, and a program or instructions stored in the memory and executable on the processor, wherein when the program or instructions are executed by the processor, they implement the steps in the relay information transmission method provided in embodiments of this application.

[0019] Eighthly, embodiments of this application provide a terminal, including a processor and a communication interface, wherein the communication interface is configured to: receive a request message sent by a remote terminal, the request message being used to request relay information; and send a first reply message to the remote terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0020] Ninthly, embodiments of this application provide a readable storage medium storing a program or instructions, wherein when the program or instructions are executed by a processor, they implement the steps in the relay information acquisition method provided in embodiments of this application, or, when the program or instructions are executed by a processor, they implement the steps in the relay information transmission method provided in embodiments of this application.

[0021] In a tenth aspect, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run a program or instructions to implement the steps in the relay information acquisition method provided in embodiments of this application, or, when the program or instructions are executed by the processor, to implement the steps in the relay information transmission method provided in embodiments of this application.

[0022] Eleventhly, embodiments of this application provide a computer program / program product, which is stored in a non-transient storage medium. The computer program / program product is executed by at least one processor to implement the steps in the relay information acquisition method provided in embodiments of this application, or the program or instructions are executed by a processor to implement the steps in the relay information transmission method provided in embodiments of this application.

[0023] In this embodiment, the remote terminal sends a request message to the relay terminal, the request message being used to request relay information; the remote terminal receives a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal. Thus, by requesting relay information through a request message, resource waste can be avoided, thereby conserving resources. Attached Figure Description

[0024] Figure 1 This diagram illustrates a block diagram of a wireless communication system to which embodiments of this application may be applied;

[0025] Figure 2 This is a flowchart of a method for obtaining relay information provided in an embodiment of this application;

[0026] Figure 3 This is a flowchart of a relay information transmission method provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of a method for obtaining relay information provided in an embodiment of this application;

[0028] Figure 5 This is a structural diagram of a relay information acquisition device provided in an embodiment of this application;

[0029] Figure 6 This is a structural diagram of a relay information transmitting device provided in an embodiment of this application;

[0030] Figure 7 This is a structural diagram of the communication device provided in the embodiments of this application;

[0031] Figure 8 This is a structural diagram of a terminal provided in an embodiment of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description. These technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0035] Figure 1 This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a remote terminal 11 and a relay terminal 12.

[0036] Among them, the remote terminal 11 and the relay terminal 12 can be the same type of terminal or different types of terminal.

[0037] In this application embodiment, the terminal can also be referred to as a terminal device or user equipment (UE). The terminal can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines, or furniture), etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, game consoles, etc. It should be noted that this application embodiment does not limit the specific type of terminal.

[0038] The following description, in conjunction with the accompanying drawings, details a method for acquiring relay information, a method for sending relay information, a terminal, and a storage medium provided in this application, through some embodiments and application scenarios.

[0039] Please see Figure 2 , Figure 2 This is a flowchart of a method for obtaining relay information provided in an embodiment of this application, such as... Figure 2 As shown, it includes the following steps:

[0040] Step 201: The remote terminal sends a request message to the relay terminal, the request message being used to request relay information.

[0041] The aforementioned request message can be sent when a remote terminal needs relay information. For example, based on application requirements or UE route selection policy (URSP) requirements, it is determined that relay information needs to be obtained through a request message. Specifically, this can be specified in the service that relay information needs to be obtained through a request message, or based on the terminal implementation that relay information needs to be obtained through a request message, or specified in the URSP, etc.

[0042] It should be noted that, in this embodiment of the application, the method of obtaining relay information by requesting messages can be called the mode B method, that is, the remote terminal executes the mode B discovery process to obtain the relay information of the relay terminal.

[0043] In this embodiment of the application, the aforementioned relay information may be information used to meet the service requirements of the remote terminal, or information used by the remote terminal to select network-side equipment, or information used to meet the multimedia broadcast multicast service (MBMS) requirements of the remote terminal, etc., wherein the aforementioned selection of network-side equipment by the remote terminal may be the selection of a non-3GPP interworking function (N3IWF) by the remote terminal, that is, the relay information may be information used by the remote terminal to select N3IWF.

[0044] It should be noted that, in the embodiments of this application, relay information can also be referred to as additional relay information.

[0045] Step 202: The remote terminal receives a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0046] The aforementioned first reply message may be a reply message sent by the relay terminal to the remote terminal after receiving the aforementioned request message.

[0047] In this embodiment of the application, the above steps can be used to request relay information through request messages, thereby avoiding resource waste and saving resources.

[0048] As an optional implementation, the relay information includes at least one of the following:

[0049] Community signage information;

[0050] MBMS information;

[0051] Tracking area identity (TAI) information.

[0052] The cell identification information mentioned above may include the New RadioCell Global Identifier (NCGI) of the relay terminal, specifically the cell identifier of the serving cell of the relay terminal; the MBMS information mentioned above may include MBMS traffic information between the relay terminal and the MBMS; and the TAI information mentioned above may include the tracking area identifier of the serving cell of the relay terminal.

[0053] Furthermore, the aforementioned first response message may also include at least one of the following:

[0054] The identification information of the aforementioned remote terminal and the identification information of the aforementioned relay terminal;

[0055] The identification information of the remote terminal may include: the user info ID, application layer ID, and globally unique temporary UE identity (GUTI) of the remote terminal; the identification information of the relay terminal may include the user info ID, application layer ID, and GUTI of the relay terminal.

[0056] As an optional implementation, the above request message includes at least one of the following:

[0057] The identification information of the remote terminal;

[0058] The identification information of the relay terminal;

[0059] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0060] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0061] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0062] The aforementioned instruction information can indicate to the remote terminal that it needs specific relay information. In this way, the relay terminal can only send specific relay information to the remote terminal, thereby saving signaling overhead.

[0063] The aforementioned relay information change notification instruction can instruct the relay terminal to send the changed relay information to the remote terminal after the relay information has changed, so that the remote terminal can obtain the latest relay information in a timely manner.

[0064] The aforementioned periodic indication can instruct the relay terminal to periodically send relay information to the remote terminal, thereby enabling the remote terminal to obtain the latest relay information in a timely manner.

[0065] It should be noted that in some implementations, when the request message does not include the aforementioned indication information, the relay terminal, upon receiving the request message, may send default relay information or all relay information to the remote terminal. Furthermore, the identification information of the remote terminal may not be included.

[0066] It should be noted that in some implementations, when the above request message does not include the identification information of the relay terminal, the relay terminal may broadcast relay information after receiving the above request message, so that the above remote terminal can receive the relay information, and also avoid resource waste, because the broadcast is sent when the remote terminal needs the relay information.

[0067] Furthermore, in some implementations, the aforementioned request message may not include the relay terminal's identification information, relay information change notification indication, and periodic indication. For example, when a remote terminal broadcasts a request, it does not need to determine which relay terminal's relay information it needs to obtain. Alternatively, the relay terminal may send or not send the changed relay information by default, or the relay terminal may periodically send or not send relay information after receiving the request message by default.

[0068] Optionally, the indication information includes at least one of the following:

[0069] TAI indicator, cell sign indicator, MBMS indicator;

[0070] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0071] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0072] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0073] In this implementation, the TAI indication, cell identifier indication, and MBMS indication can be used to instruct the relay terminal to only send the corresponding relay information, thereby saving signaling overhead.

[0074] As an optional implementation, the destination layer 2 identifier in the request message includes any one of the following:

[0075] A pre-configured layer 2 identifier for the request message;

[0076] The source layer 2 identifier of the relay terminal;

[0077] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0078] The pre-configured Layer 2 identifier for the request message can be a Layer 2 identifier pre-configured for the request message.

[0079] The source layer 2 identifier of the aforementioned relay terminal may be the source layer 2 identifier of the relay terminal that the remote terminal has already obtained before sending the aforementioned request message. For example, the remote terminal and the relay terminal had signaling interaction before sending the aforementioned request message, and thus obtained the source layer 2 identifier of the relay terminal.

[0080] The pre-configured Layer 2 identifier for relay discovery enables the relay terminal to receive the content included in the request message based on the Layer 2 identifier after receiving it.

[0081] In this embodiment, the aforementioned destination layer 2 identifier allows the relay terminal to accurately receive the content included in the request message.

[0082] As an optional implementation, the destination layer 2 identifier of the first reply message includes any one of the following:

[0083] The source layer 2 identifier of the request message;

[0084] A pre-configured Layer 2 identifier for relay discovery messages;

[0085] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0086] The pre-configured Layer 2 identifier for relay discovery messages enables the relay terminal to receive the relay information included in the first reply message based on the Layer 2 identifier after receiving it.

[0087] The pre-configured Layer 2 identifier for relay discovery enables the relay terminal to receive the relay information included in the first reply message based on the Layer 2 identifier after receiving it.

[0088] As an optional implementation, the method further includes:

[0089] The remote terminal receives a second reply message sent by the relay terminal, the second reply message including the relay information changed by the relay terminal.

[0090] The aforementioned second reply message can be a reply message sent by the relay terminal when the relay terminal's relay information changes, and the message includes the changed relay information of the relay terminal.

[0091] The second reply message can be sent via either mode A or mode B, where mode A is a broadcast method and mode B is a request method. For example, the remote terminal receiving the second reply information sent by the relay terminal includes:

[0092] The remote terminal receives the second reply message sent by the relay terminal based on the request message; or

[0093] The remote terminal receives the second reply message broadcast by the relay terminal.

[0094] In this embodiment, the second reply message mentioned above enables the remote terminal to obtain the latest relay information from the relay terminal in a timely manner, thereby improving the service performance of the remote terminal.

[0095] As an optional implementation, the method further includes:

[0096] The remote terminal receives a third reply message periodically sent by the relay terminal, the third reply message including the relay information of the relay terminal.

[0097] The aforementioned periodically sent third reply message can be sent periodically by the relay terminal according to the request of the remote terminal, or it can be sent periodically by the relay terminal after receiving the request message if the request message of the remote terminal does not include a periodic indication.

[0098] The third reply message can be sent via either mode A or mode B. For example, the remote terminal receiving the second reply information sent by the relay terminal includes: the remote terminal receiving the third reply message periodically sent by the relay terminal includes:

[0099] The remote terminal receives the third reply message periodically sent by the relay terminal based on the request message; or

[0100] The remote terminal receives the third reply message periodically broadcast by the relay terminal.

[0101] In this embodiment, the aforementioned third reply message enables the remote terminal to obtain the latest relay information from the relay terminal in a timely manner, thereby improving the service performance of the remote terminal.

[0102] As an optional implementation, the above request message is a dedicated PC5 signaling message; and / or

[0103] The first reply message is a dedicated PC5 signaling message.

[0104] PC5 represents the communication interface between the relay terminal and the remote terminal.

[0105] The aforementioned dedicated PC5 signaling message can be a newly defined PC5 signaling message in this application embodiment, or it can be a PC5 signaling message already defined in the protocol.

[0106] In this implementation, it is possible to request relay information via PC5 signaling messages and to send relay information via PC5 signaling messages, thereby making the relay information acquisition process faster.

[0107] Furthermore, in the embodiments of this application, the second reply message and the third reply message can also be dedicated PC5 signaling messages.

[0108] It should be noted that, in the embodiments of this application, the request message is not limited to a dedicated PC5 signaling message, nor is the reply message limited to a dedicated PC5 signaling message. For example, the request message and reply message can use other signaling messages for communication between remote terminals and relay terminals as defined in the protocol.

[0109] In this embodiment, the remote terminal sends a request message to the relay terminal, the request message being used to request relay information; the remote terminal receives a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal. Thus, by requesting relay information through a request message, resource waste can be avoided, thereby conserving resources.

[0110] Please see Figure 3 , Figure 3 This is a flowchart of a relay information transmission method provided in an embodiment of this application, such as... Figure 3 As shown, it includes the following steps:

[0111] Step 301: The relay terminal receives a request message sent by the remote terminal, the request message being used to request relay information;

[0112] Step 302: The relay terminal sends a first reply message to the remote terminal based on the request message. The first reply message includes the relay information of the relay terminal.

[0113] Optionally, the relay information includes at least one of the following:

[0114] Community signage information;

[0115] Multimedia Broadcast and Multicast Service (MBMS) information;

[0116] Tracking area identifier TAI information.

[0117] Optionally, the request message includes at least one of the following:

[0118] The identification information of the remote terminal;

[0119] The identification information of the relay terminal;

[0120] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0121] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0122] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0123] Optionally, the indication information includes at least one of the following:

[0124] TAI indicator, cell sign indicator, MBMS indicator;

[0125] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0126] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0127] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0128] Optionally, the destination layer 2 identifier in the request message includes any of the following:

[0129] A pre-configured layer 2 identifier for the request message;

[0130] The source layer 2 identifier of the relay terminal;

[0131] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0132] Optionally, the destination layer 2 identifier of the first response message includes any of the following:

[0133] The source layer 2 identifier of the request message;

[0134] A pre-configured Layer 2 identifier for relay discovery messages;

[0135] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0136] Optionally, the method further includes:

[0137] The relay terminal sends a second reply message to the remote terminal, the second reply message including the relay information changed by the relay terminal.

[0138] Optionally, the relay terminal sends a second reply message to the remote terminal, including:

[0139] The relay terminal sends the second reply message to the remote terminal based on the request message; or

[0140] The relay terminal broadcasts the second reply message.

[0141] Optionally, the method further includes:

[0142] The relay terminal periodically sends a third reply message to the remote terminal, the third reply message including the relay information of the relay terminal.

[0143] Optionally, the relay terminal periodically sends a third reply message to the remote terminal, including:

[0144] The relay terminal periodically sends the third reply message to the remote terminal based on the request message; or

[0145] The relay terminal periodically broadcasts the third reply message.

[0146] Optionally, the request message is a dedicated PC5 signaling message; and / or

[0147] The first reply message is a dedicated PC5 signaling message.

[0148] It should be noted that this embodiment is used as a reference for... Figure 2 The embodiments shown depict the implementation methods of the relay terminals. For specific implementation details, please refer to [link to relevant documentation]. Figure 2 To avoid repetition, the relevant descriptions of the embodiments shown will not be repeated in this embodiment.

[0149] The method provided in this application will be illustrated by an example below.

[0150] In this embodiment, the remote terminal performs the discovery process based on Mode B to acquire the relay information (also known as additional relay information) of the relay terminal, such as... Figure 4 As shown, it includes the following steps:

[0151] Step 1: The remote terminal discovers the relay, and the remote terminal needs to obtain the relay information;

[0152] The remote terminal may need to obtain relay information by determining the execution mode B discovery process based on application requirements or URSP requirements.

[0153] Step 2: The remote terminal sends a request message to request relay information. This request message includes at least one of the following:

[0154] Remote terminal identifier, which identifies the remote terminal, including the remote terminal's user info ID / application layer ID, GUTI, etc.;

[0155] Relay terminal identifier, which identifies which specific relay terminal needs to respond, including the relay terminal's user infoID / application layer ID, GUTI, etc.;

[0156] The TAI instruction is used to indicate that the remote terminal needs to obtain the tracking area identifier of the cell in which the relay terminal is serving.

[0157] The NCGI instruction indicates that the remote terminal needs to obtain the cell identifier of the serving cell of the relay terminal;

[0158] MBMS indication is used to indicate that the remote terminal needs to obtain MBMS traffic information from the relay terminal;

[0159] The relay information change notification instruction is used to notify the remote terminal when the relay information of the relay terminal changes.

[0160] The broadcast cycle is used to indicate the interval at which a remote terminal replies to its message, i.e., how often it takes for a reply to be sent.

[0161] The destination layer 2 identifier in the above request message may include any of the following:

[0162] A pre-configured layer 2 identifier for the request message;

[0163] The source layer 2 identifier of the relay terminal;

[0164] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0165] Step 3: After receiving the above request message, the relay terminal sends a reply message, which includes at least one of the following:

[0166] Remote terminal identifier, which identifies the remote terminal receiving the information;

[0167] Relay terminal identifier, which identifies the relay terminal, including the relay terminal's user info ID / application layer ID, GUTI, etc.;

[0168] TAI information indicates the tracking area identifier of the serving cell of the current relay terminal;

[0169] NCGI information, used for the cell identifier of the serving cell of the current relay terminal;

[0170] MBMS information, used for the MBMS traffic information of the current relay terminal;

[0171] The destination layer 2 identifier of the above reply message may include any of the following:

[0172] The source layer 2 identifier of the request message;

[0173] A pre-configured Layer 2 identifier for relay discovery messages;

[0174] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0175] In one implementation, if the request message in step 2 includes a relay information change notification indication:

[0176] Step 4: The relay information of the relay terminal changes;

[0177] Step 5a: The relay terminal sends a reply message to the remote terminal, which includes the changed relay information.

[0178] The destination layer 2 identifier of the reply message may include any of the following:

[0179] The source layer 2 identifier of the request message;

[0180] A pre-configured Layer 2 identifier for relay discovery messages;

[0181] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0182] In another implementation, where the request message in step 2 includes a relay information change notification indication:

[0183] Step 4: The relay information of the relay terminal changes;

[0184] Step 5b: The relay terminal sends relay information through the discovery process of Mode A, which includes additional information about the changes, and at least one of the following:

[0185] Remote terminal identifier, which identifies the remote terminal receiving the information;

[0186] Relay terminal identifier, which identifies the relay terminal, including the relay terminal's user info ID / application layer ID, GUTI, etc.

[0187] In one embodiment, if the request message in step 2 includes a broadcast period, the above method may further include:

[0188] The relay terminal periodically sends a reply message to the remote terminal, and the third reply message includes the relay information of the relay terminal.

[0189] The periodic sending of reply messages can be done in either mode A or mode B. For example, the relay terminal periodically sends reply messages based on the above request messages, or the relay terminal periodically broadcasts reply messages.

[0190] In this embodiment, the relay information of the relay terminal is obtained through a request message, which can effectively avoid the blind transmission of relay information and the waste of resources, thereby saving resources.

[0191] Please see Figure 5 , Figure 5 This is a structural diagram of a relay information acquisition device provided in an embodiment of this application, as shown below. Figure 5 As shown, it includes:

[0192] Sending module 501 is used to send a request message to the relay terminal, the request message being used to request relay information;

[0193] The first receiving module 502 is configured to receive a first reply message sent by the relay terminal based on the request message, wherein the first reply message includes the relay information of the relay terminal.

[0194] Optionally, the relay information includes at least one of the following:

[0195] Community signage information;

[0196] Multimedia Broadcast and Multicast Service (MBMS) information;

[0197] Tracking area identifier TAI information.

[0198] Optionally, the request message includes at least one of the following:

[0199] The identification information of the remote terminal;

[0200] The identification information of the relay terminal;

[0201] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0202] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0203] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0204] Optionally, the indication information includes at least one of the following:

[0205] TAI indicator, cell sign indicator, MBMS indicator;

[0206] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0207] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0208] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0209] Optionally, the destination layer 2 identifier in the request message includes any of the following:

[0210] A pre-configured layer 2 identifier for the request message;

[0211] The source layer 2 identifier of the relay terminal;

[0212] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0213] Optionally, the destination layer 2 identifier of the first response message includes any of the following:

[0214] The source layer 2 identifier of the request message;

[0215] A pre-configured Layer 2 identifier for relay discovery messages;

[0216] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0217] Optionally, the device further includes:

[0218] The second receiving module is used to receive the second reply information sent by the relay terminal, the second reply information including the relay information changed by the relay terminal.

[0219] Optionally, the second receiving module is configured to: receive the second reply message sent by the relay terminal based on the request message; or, receive the second reply message broadcast by the relay terminal.

[0220] Optionally, the device further includes:

[0221] The third receiving module is used to receive a third reply message periodically sent by the relay terminal, the third reply message including the relay information of the relay terminal.

[0222] Optionally, the third receiving module is configured to: receive the third reply message periodically sent by the relay terminal based on the request message; or, receive the third reply message periodically broadcast by the relay terminal.

[0223] Optionally, the request message is a dedicated PC5 signaling message; and / or

[0224] The first reply message is a dedicated PC5 signaling message.

[0225] The aforementioned terminals can save resources.

[0226] The relay information acquisition device in this application embodiment can be a device, a device with an operating system, or an electronic device, or it can be a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not impose specific limitations.

[0227] The relay information acquisition device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0228] Please see Figure 6 , Figure 6 This is a structural diagram of a relay information transmitting device provided in an embodiment of this application, as shown below. Figure 6 As shown, it includes:

[0229] The receiving module 601 is used to receive a request message sent by a remote terminal, the request message being used to request relay information;

[0230] The first sending module 602 is used to send a first reply message to the remote terminal based on the request message, wherein the first reply message includes the relay information of the relay terminal.

[0231] Optionally, the relay information includes at least one of the following:

[0232] Community signage information;

[0233] Multimedia Broadcast and Multicast Service (MBMS) information;

[0234] Tracking area identifier TAI information.

[0235] Optionally, the request message includes at least one of the following:

[0236] The identification information of the remote terminal;

[0237] The identification information of the relay terminal;

[0238] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0239] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0240] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0241] Optionally, the indication information includes at least one of the following:

[0242] TAI indicator, cell sign indicator, MBMS indicator;

[0243] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0244] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0245] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0246] Optionally, the destination layer 2 identifier in the request message includes any of the following:

[0247] A pre-configured layer 2 identifier for the request message;

[0248] The source layer 2 identifier of the relay terminal;

[0249] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0250] Optionally, the destination layer 2 identifier of the first response message includes any of the following:

[0251] The source layer 2 identifier of the request message;

[0252] A pre-configured Layer 2 identifier for relay discovery messages;

[0253] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0254] Optionally, the device further includes:

[0255] The second sending module is used to send a second reply information to the remote terminal, the second reply information including the relay information changed by the relay terminal.

[0256] Optionally, the second sending module is used to: send the second reply message to the remote terminal based on the request message; or, broadcast the second reply message.

[0257] Optionally, the device further includes:

[0258] The third sending module is used to periodically send a third reply message to the remote terminal, the third reply message including the relay information of the relay terminal.

[0259] Optionally, the third sending module is used to: periodically send the third reply message to the remote terminal based on the request message; or, periodically broadcast the third reply message.

[0260] Optionally, the request message is a dedicated PC5 signaling message; and / or

[0261] The first reply message is a dedicated PC5 signaling message.

[0262] The aforementioned terminals can save resources.

[0263] The relay information transmitting device in this application embodiment can be a device, a device or electronic device with an operating system, or a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminal 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not impose specific limitations.

[0264] The relay information transmission device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0265] Optional, such as Figure 7 As shown, this application embodiment also provides a communication device 700, including a processor 701, a memory 702, and a program or instructions stored in the memory 702 and executable on the processor 701. For example, when the program or instructions are executed by the processor 701, they implement various processes of the relay information acquisition method or the relay information transmission method embodiment, and can achieve the same technical effect. This communication device is a terminal.

[0266] This application embodiment also provides a communication device, including a processor and a communication interface, wherein the communication interface is used to: send a request message to a relay terminal, the request message being used to request relay information; and receive a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0267] Alternatively, the communication interface is used to: receive a request message sent by a remote terminal, the request message being used to request relay information; and send a first reply message to the remote terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0268] This communication device embodiment is similar to the one described above. Figures 2 to 3 The various implementation processes and methods of the above-described method embodiments can be applied to this communication device embodiment and can achieve the same technical effect.

[0269] Specifically, Figure 8 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0270] The terminal 800 includes, but is not limited to, at least some of the following components: radio frequency unit 801, network module 802, audio output unit 803, input unit 804, sensor 805, display unit 806, user input unit 807, interface unit 808, memory 809, and processor 810.

[0271] Those skilled in the art will understand that the terminal 800 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 810 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 2 The terminal structure shown does not constitute a limitation on the communication device. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0272] It should be understood that, in this embodiment, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The GPU 8041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0273] In this embodiment, the radio frequency unit 801 receives downlink data from the network-side device and processes it for the processor 810; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0274] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 809 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0275] Processor 810 may include one or more processing units; optionally, processor 810 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 810.

[0276] In the embodiment where the terminal is a remote terminal, the radio frequency unit 801 is used to send a request message from the remote terminal to the relay terminal, the request message being used to request relay information; and to receive a first reply message sent by the relay terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0277] Optionally, the relay information includes at least one of the following:

[0278] Community signage information;

[0279] Multimedia Broadcast and Multicast Service (MBMS) information;

[0280] Tracking area identifier TAI information.

[0281] Optionally, the request message includes at least one of the following:

[0282] The identification information of the remote terminal;

[0283] The identification information of the relay terminal;

[0284] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0285] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0286] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0287] Optionally, the indication information includes at least one of the following:

[0288] TAI indicator, cell sign indicator, MBMS indicator;

[0289] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0290] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0291] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0292] Optionally, the destination layer 2 identifier in the request message includes any of the following:

[0293] A pre-configured layer 2 identifier for the request message;

[0294] The source layer 2 identifier of the relay terminal;

[0295] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0296] Optionally, the destination layer 2 identifier of the first response message includes any of the following:

[0297] The source layer 2 identifier of the request message;

[0298] A pre-configured Layer 2 identifier for relay discovery messages;

[0299] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0300] Optionally, the radio frequency unit 801 is also used for:

[0301] The system receives a second response message sent by the relay terminal, the second response message including the relay information changed by the relay terminal.

[0302] Optionally, receiving the second reply information sent by the relay terminal includes:

[0303] Receive the second reply message sent by the relay terminal based on the request message; or

[0304] Receive the second reply message broadcast by the relay terminal.

[0305] Optionally, the radio frequency unit 801 is also used for:

[0306] The relay terminal periodically sends a third reply message, which includes the relay information of the relay terminal.

[0307] Optionally, receiving the third reply message periodically sent by the relay terminal includes:

[0308] Receive the third reply message periodically sent by the relay terminal based on the request message; or

[0309] The relay terminal periodically broadcasts the third reply message.

[0310] Optionally, the request message is a dedicated PC5 signaling message; and / or

[0311] The first reply message is a dedicated PC5 signaling message.

[0312] In the embodiment where the terminal is a relay terminal, the radio frequency unit 801 is used to receive a request message sent by a remote terminal, the request message being used to request relay information; and to send a first reply message to the remote terminal based on the request message, the first reply message including the relay information of the relay terminal.

[0313] Optionally, the relay information includes at least one of the following:

[0314] Community signage information;

[0315] Multimedia Broadcast and Multicast Service (MBMS) information;

[0316] Tracking area identifier TAI information.

[0317] Optionally, the request message includes at least one of the following:

[0318] The identification information of the remote terminal;

[0319] The identification information of the relay terminal;

[0320] Instruction information, the instruction information being used to indicate the information required by the remote terminal;

[0321] The relay information change notification instruction is used to instruct the remote terminal to send the changed relay information when the relay information of the relay terminal changes.

[0322] A periodic indicator is used to instruct the relay terminal to periodically send relay information to the remote terminal.

[0323] Optionally, the indication information includes at least one of the following:

[0324] TAI indicator, cell sign indicator, MBMS indicator;

[0325] The TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal;

[0326] The cell identifier indicates the identifier information of the serving cell that the remote terminal needs;

[0327] The MBMS indication is used to indicate that the terminal requires the MBMS information of the relay terminal.

[0328] Optionally, the destination layer 2 identifier in the request message includes any of the following:

[0329] A pre-configured layer 2 identifier for the request message;

[0330] The source layer 2 identifier of the relay terminal;

[0331] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0332] Optionally, the destination layer 2 identifier of the first response message includes any of the following:

[0333] The source layer 2 identifier of the request message;

[0334] A pre-configured Layer 2 identifier for relay discovery messages;

[0335] A pre-configured Layer 2 identifier for relay discovery of additional information.

[0336] Optionally, the radio frequency unit 801 is also used for:

[0337] A second response message is sent to the remote terminal, the second response message including the changed relay information of the relay terminal.

[0338] Optionally, sending the second reply information to the remote terminal includes:

[0339] Send the second reply message to the remote terminal based on the request message; or

[0340] Broadcast the second reply message.

[0341] Optionally, the radio frequency unit 801 is also used for:

[0342] The relay terminal periodically sends a third reply message to the remote terminal, the third reply message including the relay information of the relay terminal.

[0343] Optionally, the step of periodically sending a third reply message to the remote terminal includes:

[0344] Based on the request message, the third reply message is periodically sent to the remote terminal; or

[0345] The third reply message is broadcast periodically.

[0346] Optionally, the request message is a dedicated PC5 signaling message; and / or

[0347] The first reply message is a dedicated PC5 signaling message.

[0348] The aforementioned terminals can save resources.

[0349] Specifically, the terminal in this embodiment of the invention further includes: instructions or programs stored in memory 809 and executable on processor 810, wherein processor 810 calls the instructions or programs in memory 809 to execute... Figure 5Alternatively, the methods executed by each module shown in Figure 6 can achieve the same technical effect. To avoid repetition, they will not be described in detail here.

[0350] This application provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the steps in the relay information acquisition method provided in this application, or the program or instructions, when executed by a processor, implement the steps in the relay information transmission method provided in this application.

[0351] It should be noted that the readable storage medium provided in the embodiments of this application may be volatile or non-volatile, and this application does not impose any restrictions on it.

[0352] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0353] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described relay information acquisition method or relay information transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0354] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0355] This application also provides a computer program / program product, which is stored in a non-transient storage medium. The computer program / program product is executed by at least one processor to implement the steps in the relay information acquisition method provided in this application embodiment, or the program or instructions are executed by the processor to implement the steps in the relay information transmission method provided in this application embodiment.

[0356] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0357] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0358] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for acquiring relay information, characterized in that, include: During the discovery process, the remote terminal sends a request message to the relay terminal, which is used to request additional information from the relay. During the discovery process, the remote terminal receives a first reply message sent by the relay terminal based on the request message. The first reply message includes additional relay information of the relay terminal. The additional relay information includes at least one of the following: Community signage information; Multimedia Broadcast and Multicast Service (MBMS) information; Tracking area identifier TAI information; The request message includes indication information, which indicates the information required by the remote terminal. The indication information includes at least one of the following: TAI indicator, cell sign indicator, MBMS indicator; Wherein, the TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal; the cell identifier indication is used to indicate that the remote terminal needs the identifier information of the serving cell of the relay terminal; and the MBMS indication is used to indicate that the terminal needs the MBMS information of the relay terminal.

2. The method as described in claim 1, characterized in that, The request message also includes at least one of the following: The identification information of the remote terminal; The identification information of the relay terminal; The relay information change notification instruction is used to instruct the remote terminal to send the changed relay additional information when the relay additional information of the relay terminal changes. A periodic indicator is used to instruct the relay terminal to periodically send additional relay information to the remote terminal.

3. The method as described in claim 1 or 2, characterized in that, The destination layer 2 identifier in the request message includes any of the following: A pre-configured layer 2 identifier for the request message; The source layer 2 identifier of the relay terminal; A pre-configured Layer 2 identifier for relay discovery of additional information.

4. The method as described in claim 1 or 2, characterized in that, The destination layer 2 identifier of the first reply message includes any of the following: The source layer 2 identifier of the request message; A pre-configured Layer 2 identifier for relay discovery messages; A pre-configured Layer 2 identifier for relay discovery of additional information.

5. The method as described in claim 1 or 2, characterized in that, The method further includes: The remote terminal receives a second reply message sent by the relay terminal, the second reply message including additional relay information changed by the relay terminal.

6. The method as described in claim 5, characterized in that, The remote terminal receives a second reply message sent by the relay terminal, including: The remote terminal receives the second reply message sent by the relay terminal based on the request message; or The remote terminal receives the second reply message broadcast by the relay terminal.

7. The method as described in claim 1 or 2, characterized in that, The method further includes: The remote terminal receives a third reply message periodically sent by the relay terminal, the third reply message including additional relay information of the relay terminal.

8. The method as described in claim 7, characterized in that, The remote terminal receives a third reply message periodically sent by the relay terminal, including: The remote terminal receives the third reply message periodically sent by the relay terminal based on the request message; or The remote terminal receives the third reply message periodically broadcast by the relay terminal.

9. The method as described in claim 1 or 2, characterized in that, The request message is a dedicated PC5 signaling message; and / or The first reply message is a dedicated PC5 signaling message.

10. A method for transmitting relay information, characterized in that, include: During the discovery process, the relay terminal receives a request message sent by the remote terminal, which is used to request additional relay information. During the discovery process, the relay terminal sends a first reply message to the remote terminal based on the request message. The first reply message includes additional relay information of the relay terminal. The additional relay information includes at least one of the following: Community signage information; Multimedia Broadcast and Multicast Service (MBMS) information; Tracking area identifier TAI information; The request message includes indication information, which indicates the information required by the remote terminal. The indication information includes at least one of the following: TAI indicator, cell sign indicator, MBMS indicator; Wherein, the TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal; the cell identifier indication is used to indicate that the remote terminal needs the identifier information of the serving cell of the relay terminal; and the MBMS indication is used to indicate that the terminal needs the MBMS information of the relay terminal.

11. The method as described in claim 10, characterized in that, The request message also includes at least one of the following: The identification information of the remote terminal; The identification information of the relay terminal; The relay information change notification instruction is used to instruct the remote terminal to send the changed relay additional information when the relay additional information of the relay terminal changes. A periodic indicator is used to instruct the relay terminal to periodically send additional relay information to the remote terminal.

12. The method as described in claim 10 or 11, characterized in that, The destination layer 2 identifier in the request message includes any of the following: A pre-configured layer 2 identifier for the request message; The source layer 2 identifier of the relay terminal; A pre-configured Layer 2 identifier for relay discovery of additional information.

13. The method as described in claim 10 or 11, characterized in that, The destination layer 2 identifier of the first reply message includes any of the following: The source layer 2 identifier of the request message; A pre-configured Layer 2 identifier for relay discovery messages; A pre-configured Layer 2 identifier for relay discovery of additional information.

14. The method as described in claim 10 or 11, characterized in that, The method further includes: The relay terminal sends a second reply message to the remote terminal, the second reply message including additional relay information changed by the relay terminal.

15. The method as described in claim 14, characterized in that, The relay terminal sends a second reply message to the remote terminal, including: The relay terminal sends the second reply message to the remote terminal based on the request message; or The relay terminal broadcasts the second reply message.

16. The method as described in claim 10 or 11, characterized in that, The method further includes: The relay terminal periodically sends a third reply message to the remote terminal, the third reply message including additional relay information of the relay terminal.

17. The method as described in claim 16, characterized in that, The relay terminal periodically sends a third reply message to the remote terminal, including: The relay terminal periodically sends the third reply message to the remote terminal based on the request message; or The relay terminal periodically broadcasts the third reply message.

18. The method as described in claim 10 or 11, characterized in that, The request message is a dedicated PC5 signaling message; and / or The first reply message is a dedicated PC5 signaling message.

19. A relay information acquisition device, wherein the remote terminal corresponding to the device is characterized in that, include: The sending module is used to send a request message to the relay terminal during the discovery process, the request message being used to request additional information from the relay. The first receiving module is configured to receive a first reply message sent by the relay terminal based on the request message during the discovery process, wherein the first reply message includes additional relay information of the relay terminal; The additional relay information includes at least one of the following: Community signage information; Multimedia Broadcast and Multicast Service (MBMS) information; Tracking area identifier TAI information; The request message includes indication information, which indicates the information required by the remote terminal. The indication information includes at least one of the following: TAI indicator, cell sign indicator, MBMS indicator; Wherein, the TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal; the cell identifier indication is used to indicate that the remote terminal needs the identifier information of the serving cell of the relay terminal; and the MBMS indication is used to indicate that the terminal needs the MBMS information of the relay terminal.

20. The apparatus as claimed in claim 19, characterized in that, The request message also includes at least one of the following: The identification information of the remote terminal; The identification information of the relay terminal; The relay information change notification instruction is used to instruct the remote terminal to send the changed relay additional information when the relay additional information of the relay terminal changes. A periodic indicator is used to instruct the relay terminal to periodically send additional relay information to the remote terminal.

21. A relay information transmitting device, wherein the relay terminal corresponding to the device is characterized in that, include: The receiving module is used to receive a request message sent by a remote terminal during the discovery process. The request message is used to request additional relay information. The first sending module is used to send a first reply message to the remote terminal based on the request message during the discovery process. The first reply message includes additional relay information of the relay terminal. The additional relay information includes at least one of the following: Community signage information; Multimedia Broadcast and Multicast Service (MBMS) information; Tracking area identifier TAI information; The request message includes indication information, which indicates the information required by the remote terminal. The indication information includes at least one of the following: TAI indicator, cell sign indicator, MBMS indicator; Wherein, the TAI indication is used to indicate that the remote terminal needs the TAI identifier of the serving cell of the relay terminal; the cell identifier indication is used to indicate that the remote terminal needs the identifier information of the serving cell of the relay terminal; and the MBMS indication is used to indicate that the terminal needs the MBMS information of the relay terminal.

22. The apparatus as claimed in claim 21, characterized in that, The request message also includes at least one of the following: The identification information of the remote terminal; The identification information of the relay terminal; The relay information change notification instruction is used to instruct the remote terminal to send the changed relay additional information when the relay additional information of the relay terminal changes. A periodic indicator is used to instruct the relay terminal to periodically send additional relay information to the remote terminal.

23. A remote terminal, characterized in that, include: A memory, a processor, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the relay information acquisition method as described in any one of claims 1 to 9.

24. A relay terminal, characterized in that, include: A memory, a processor, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the relay information transmission method as described in any one of claims 10 to 18.

25. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps in the relay information acquisition method as described in any one of claims 1 to 9, or, when executed by a processor, implement the steps in the relay information transmission method as described in any one of claims 10 to 18.

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