A message transmission method / apparatus / device and storage medium

Abstract

The present disclosure provides a message transmission method / apparatus / device and a storage medium. The method includes: sending a first message to a relay UE; the remote UE enters an active state to listen for a sidelink (SL) between the remote UE and the relay UE; in response to receiving a second message, the remote UE stops the active state; wherein the second message is a response message to the first message. The method of the present disclosure ensures the successful reception of the response message (i.e., the second message) by the remote UE, and ensures the communication stability of the SL.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a message transmission method / apparatus / device and a storage medium. Background Art

[0002] In a communication system, by introducing a sidelink (SL) communication mode, direct communication between user equipments (UEs) is achieved. Further, in order to save the power consumption of SL UEs, discontinuous reception (DRX) of SL is introduced, that is, the receiving UE only listens for the second-stage SCI (sidelink control information) on the logical channel in the active state. Further, a UE may not be directly communicatively connected to a base station, but instead communicate with the base station through the relay of another UE. Among them, the UE not connected to the base station is called a remote UE, and the UE providing the relay function is called a relay UE. Further, unicast communication may be performed between the remote UE and the relay UE through SL.

[0003] In related technologies, a remote UE in the idle state may send a radio resource control (RRC) establishment request message to the relay UE, so that the relay UE forwards the RRC establishment request message to the base station, and forwards the RRC establishment message sent by the base station to the remote UE to complete the connection establishment process; further, a remote UE in the inactive state may send an RRC resume request message to the relay UE, so that the relay UE forwards the RRC resume request message to the base station, and forwards the RRC resume message sent by the base station to the remote UE to complete the connection resume process; further, when a connection failure occurs to the remote UE, an RRC reestablishment request message may be sent to the relay UE, so that the relay UE forwards the RRC reestablishment request message to the base station, and forwards the RRC reestablishment message sent by the base station to the remote UE to complete the connection reestablishment process. Further, the remote UE may also send a system information request message to the relay UE and receive the system information sent by the relay UE.

[0004] However, in related technologies, after the remote UE sends an RRC establishment / resume / reestablishment / system information request message to the relay UE, the remote UE may enter the SL DRX sleep state, and thus may be unable to receive the RRC establishment / resume / reestablishment message / system information forwarded by the relay UE, resulting in connection establishment / connection resume / connection reestablishment failure, or causing the system information to be sent with a delay, thus affecting the communication stability of SL. Summary of the Invention

[0005] The message transmission method / apparatus / device and storage medium proposed by the present disclosure are used to solve the technical problem that the method in the related art affects the communication stability of the SL.

[0006] In a first aspect, an embodiment of the present disclosure provides a message transmission method, which is executed by a remote UE and includes:

[0007] Sending a first message to a relay UE;

[0008] The remote UE enters an active state to listen for the sidelink SL between the remote UE and the relay UE;

[0009] In response to receiving a second message, the remote UE stops the active state; where the second message is a response message to the first message.

[0010] In the present disclosure, only after the remote UE receives the response message (i.e., the second message) from the relay UE for the first message sent by the remote UE, will it stop the active state. Thus, it can avoid the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection reconstruction process to be successfully executed, and avoiding causing the system information to be sent late, ensuring the communication stability of the SL.

[0011] Optionally, the remote UE entering the active state includes:

[0012] After sending the first message to the relay UE, the remote UE immediately enters the active state.

[0013] Optionally, the remote UE entering the active state includes:

[0014] After sending the first message to the relay UE, starting a timer;

[0015] In response to the timer timing out, the remote UE enters the active state.

[0016] Optionally, the method further includes at least one of the following:

[0017] Receiving the timing duration configured by the network device for the timer;

[0018] Receiving the timing duration configured by the relay UE for the timer.

[0019] Optionally, the holding time of the UE active state includes any one of the following:

[0020] Running time of the T300 timer;

[0021] Running time of the T301 timer;

[0022] Running time of the T319 timer;

[0023] Running time of the T319a timer.

[0024] Optionally, the first message includes at least one of the following:

[0025] Message in a specific bearer;

[0026] Message in a specific logical channel;

[0027] First Radio Resource Control (RRC) message;

[0028] First RRC message carrying a specific request;

[0029] First SL RRC message;

[0030] First SL RRC message carrying a specific request.

[0031] Optionally, the second message includes at least one of the following:

[0032] Message in a specific bearer;

[0033] Message in a specific logical channel;

[0034] Second RRC message;

[0035] Second RRC message carrying a specific configuration;

[0036] Second SL RRC message;

[0037] Second SL RRC message carrying a specific configuration.

[0038] Optionally, the specific bearer includes at least one of the following:

[0039] Signaling Radio Bearer (SRB0);

[0040] SRB1;

[0041] SRB2.

[0042] Optionally, the first RRC message includes at least one of the following:

[0043] RRC establishment request message;

[0044] RRC resume request message;

[0045] RRC re - establishment request message;

[0046] System information request message.

[0047] Optionally, the first SL RRC message includes a remote UE information message RemoteUEInformationSidelink.

[0048] Optionally, the specific request includes a request for requesting specific system information.

[0049] Optionally, the second RRC message includes at least one of the following:

[0050] RRC establishment message;

[0051] RRC resume message;

[0052] RRC reconstruction message;

[0053] RRC reconfiguration message.

[0054] Optionally, the second SL RRC message includes a Uu message forwarding message UuMessageTransferSidelink.

[0055] Optionally, the specific configuration includes specific system information.

[0056] Optionally, the specific system information is specified by the protocol.

[0057] In a second aspect, an embodiment of the present disclosure provides a message transmission method, which is executed by a relay UE and includes:

[0058] Receiving a first message sent by a remote UE;

[0059] Forwarding the first message to a base station;

[0060] Receiving a second message sent by the base station; wherein the second message is a response message to the first message;

[0061] Forwarding the second message to the relay UE.

[0062] Optionally, the method further includes:

[0063] Configuring the timing duration of a timer for the remote UE.

[0064] In a third aspect, an embodiment of the present disclosure provides a message transmission method, which is executed by a base station and includes:

[0065] Receiving a first message sent by a relay UE;

[0066] Sending a second message to the relay UE; wherein the second message is a response message to the first message.

[0067] Optional. The method further includes:

[0068] Configuring the timing duration of a timer for the remote UE.

[0069] In a fourth aspect, an embodiment of the present disclosure provides a communication device configured in a remote UE, including:

[0070] A transceiver module, configured to send a first message to a relay UE;

[0071] A processing module, configured to enable the remote UE to listen for a sidelink (SL) between the remote UE and the relay UE in an active state;

[0072] The processing module is further configured to, in response to receiving a second message, cause the remote UE to stop the active state; wherein the second message is a response message to the first message.

[0073] In a fifth aspect, an embodiment of the present disclosure provides a communication device configured in a relay UE, including:

[0074] A transceiver module, configured to receive a first message sent by a remote UE;

[0075] The transceiver module is further configured to forward the first message to a base station;

[0076] The transceiver module is further configured to receive a second message sent by the base station; wherein the second message is a response message to the first message;

[0077] The transceiver module is further configured to forward the second message to the relay UE.

[0078] In a sixth aspect, an embodiment of the present disclosure provides a communication device configured in a base station, including:

[0079] Receiving a first message sent by a relay UE;

[0080] Sending a second message to the relay UE; wherein the second message is a response message to the first message.

[0081] In a seventh aspect, an embodiment of the present disclosure provides a communication device including a processor, which, when calling a computer program in a memory, executes the method described in the first aspect above.

[0082] In an eighth aspect, an embodiment of the present disclosure provides a communication device including a processor, which, when calling a computer program in a memory, executes the method described in the second aspect above.

[0083] In a ninth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor that, when invoking a computer program in a memory, executes the method described in the third aspect above.

[0084] In a tenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0085] In an eleventh aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0086] In a twelfth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory so that the communication device executes the method described in the third aspect above.

[0087] In a thirteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit. The interface circuit is configured to receive code instructions and transmit them to the processor, and the processor is configured to run the code instructions so that the device executes the method described in the first aspect above.

[0088] In a fourteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit. The interface circuit is configured to receive code instructions and transmit them to the processor, and the processor is configured to run the code instructions so that the device executes the method described in the second aspect above.

[0089] In a fifteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit. The interface circuit is configured to receive code instructions and transmit them to the processor, and the processor is configured to run the code instructions so that the device executes the method described in the third aspect above.

[0090] In a sixteenth aspect, an embodiment of the present disclosure provides a communication system, which includes the communication devices described in the fourth aspect to the sixth aspect, or the system includes the communication devices described in the seventh aspect to the ninth aspect, or the system includes the communication devices described in the tenth aspect to the twelfth aspect, or the system includes the communication devices described in the thirteenth aspect to the fifteenth aspect.

[0091] In a seventeenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions used by the above network device. When the instructions are executed, the terminal device is caused to execute the method described in any one of the first to third aspects above.

[0092] In an eighteenth aspect, the present disclosure further provides a computer program product including a computer program. When it runs on a computer, the computer is caused to execute the method described in any one of the first to third aspects above.

[0093] In a nineteenth aspect, the present disclosure provides a chip system. The chip system includes at least one processor and an interface, and is used to support the network device in implementing the functions involved in the method described in any one of the first to third aspects. For example, determining or processing at least one of the data and information involved in the above method. In a possible design, the chip system further includes a memory for storing the necessary computer programs and data of the source secondary node. The chip system may be composed of chips or may include chips and other discrete devices.

[0094] In a twentieth aspect, the present disclosure provides a computer program. When it runs on a computer, the computer is caused to execute the method described in any one of the first to third aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] The above and / or additional aspects and advantages of the present disclosure will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0096] Figure 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0097] Figure 2 is a schematic flowchart of a message transmission method provided by another embodiment of the present disclosure;

[0098] Figure 3 is a schematic flowchart of a message transmission method provided by still another embodiment of the present disclosure;

[0099] Figure 4 is a schematic flowchart of a message transmission method provided by yet another embodiment of the present disclosure;

[0100] Figure 5 is a schematic flowchart of a message transmission method provided by another embodiment of the present disclosure;

[0101] Figure 6 is a schematic flowchart of a message transmission method provided by still another embodiment of the present disclosure;

[0102] Figure 7Flow chart of the message transmission method provided by another embodiment of the present disclosure;

[0103] Figure 8 Flow chart of the message transmission method provided by an embodiment of the present disclosure;

[0104] Figure 9 Structural diagram of the communication device provided by an embodiment of the present disclosure;

[0105] Figure 10 Structural diagram of the communication device provided by another embodiment of the present disclosure;

[0106] Figure 11 Structural diagram of the communication device provided by another embodiment of the present disclosure;

[0107] Figure 12 Block diagram of a user equipment provided by an embodiment of the present disclosure;

[0108] Figure 13 Block diagram of a network - side device provided by an embodiment of the present disclosure. Detailed implementation mode

[0109] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present disclosure as detailed in the appended claims.

[0110] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present 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 or all possible combinations of one or more of the associated listed items.

[0111] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0112] Embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and should not be construed as a limitation of the present disclosure.

[0113] For ease of understanding, the terms related to this application will be introduced first.

[0114] 1. Fifth-generation mobile networks (5G)

[0115] 5G is a new generation of broadband mobile communication technology featuring high speed, low latency, and large connection, and is a network infrastructure for realizing the interconnection of humans, machines, and things.

[0116] 2. Sidelink (SL)

[0117] A link for direct communication between terminal devices.

[0118] 3. Remote UE

[0119] A UE that communicates with the base station through other UEs without directly communicating with the base station.

[0120] 4. Relay UE

[0121] A UE used to implement relay communication between other UEs and the base station.

[0122] To better understand a message transmission method disclosed in the embodiments of the present disclosure, a communication system applicable to the embodiments of the present disclosure will be described first below.

[0123] Please refer to Figure 1 , Figure 1 , which is a schematic diagram of the architecture of a communication system provided by the embodiments of the present disclosure. The communication system may include, but is not limited to, a network device, a remote terminal device, and a relay terminal device. Figure 1 The number and form of the devices shown are only for illustration and do not constitute a limitation on the embodiments of the present disclosure. In practical applications, there may be two or more network devices and two or more terminal devices. Figure 1 The communication system shown takes one network device 11, one remote terminal device 12, and one relay terminal device 13 as an example.

[0124] It should be noted that the technical solutions of the embodiments of the present 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, etc.

[0125] The network device 11 in the embodiments of the present disclosure is an entity on the network side for transmitting or receiving signals. For example, the network device 11 can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a Wireless Fidelity (WiFi) system, etc. The embodiments of the present disclosure do not limit the specific technologies and specific device forms adopted by the network device. The network device provided by the embodiments of the present disclosure can be composed of a central unit (CU) and a distributed unit (DU). Among them, the CU can also be called a control unit. Adopting the CU-DU structure can split the protocol layer of the network device, such as a base station. The functions of some protocol layers are centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0126] In the embodiments of the present disclosure, the remote terminal device 12 and the relay terminal device 13 can be entities on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device can also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device can be an automobile with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a smart home, and so on. The specific technologies and specific device forms adopted by the terminal device in the embodiments of the present disclosure are not limited.

[0127] It can be understood that the communication system described in the embodiments of the present disclosure is to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art know that with the evolution of the system architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0128] The message transmission method / apparatus / device and storage medium provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0129] Figure 2 It is a schematic flowchart of a message transmission method provided by an embodiment of the present disclosure, which is executed by a remote UE, as Figure 2 shown. The message transmission method may include the following steps:

[0130] Step 201: Send a first message to the relay UE.

[0131] In an embodiment of the present disclosure, the first message may include at least one of the following:

[0132] Messages in a specific bearer;

[0133] Message in a specific logical channel;

[0134] First RRC message;

[0135] First RRC message carrying a specific request;

[0136] First SL RRC message;

[0137] First SL RRC message carrying a specific request.

[0138] Wherein, in an embodiment of the present disclosure, the above-mentioned specific bearer may specifically include at least one of the following:

[0139] Signalling Radio Bearer (SRB) 0;

[0140] SRB1;

[0141] SRB2.

[0142] The above-mentioned specific logical channel may be any one or several logical channels, and the specific logical channel may be predetermined based on the protocol.

[0143] The above-mentioned first RRC message may include at least one of the following:

[0144] RRC establishment request message;

[0145] RRC resume request message;

[0146] RRC reconstruction request message;

[0147] System information request message (such as DedicatedSIBRequest message).

[0148] The above-mentioned first SL RRC message may be a remote UE information message (such as RemoteUEInformationSidelink message).

[0149] And, the above-mentioned specific request may specifically be a request for requesting specific system information. Wherein, the specific system information may be any one or several system information, and the specific system information may be specified by the protocol. By way of example, the specific system information may be, for example, emergency notification system information (i.e., SIB7 / 8 / 9) and / or positioning system information, etc. And, by way of example, when the first RRC message is the above-mentioned system information request message, the first RRC message may carry a specific request.

[0150] Step 202, the remote UE enters the active state to listen for the SL between the remote UE and the relay UE.

[0151] Among them, in one embodiment of the present disclosure, when the remote UE enters the active state, it can listen to the SL between the remote UE and the relay UE, so that when the relay UE sends data and / or messages to the SL, the remote UE can successfully receive the data and / or messages sent by the relay UE.

[0152] Step 203, in response to receiving the second message, the remote UE stops the active state. Among them, the second message is a response message to the first message.

[0153] Among them, in one embodiment of the present disclosure, the second message may be sent by the relay UE to the remote UE.

[0154] And, the second message may include at least one of the following:

[0155] Messages in a specific bearer;

[0156] Messages in a specific logical channel;

[0157] The second RRC message;

[0158] The second RRC message carrying a specific configuration;

[0159] The second SL RRC message;

[0160] The second SL RRC message carrying a specific configuration.

[0161] Among them, the above-mentioned specific bearer may specifically include at least one of the following:

[0162] SRB0;

[0163] SRB1;

[0164] SRB2.

[0165] The above-mentioned specific logical channel may be any one or several logical channels, and the specific logical channel may be predetermined based on the protocol.

[0166] And, the above-mentioned second RRC message is a response message to the foregoing first RRC message, among which the second RRC message may include at least one of the following:

[0167] RRC establishment message;

[0168] RRC resume message;

[0169] RRC reconstruction message:

[0170] RRC reconfiguration message (RRCReconfiguration).

[0171] The second SL RRC message described above may be a response message to the foregoing first SL RRC message, where the second SL RRC message may be a Uu message forwarding message (such as a UuMessageTransferSidelink message).

[0172] In addition, the specific configuration described above may include specific system information. The specific system information may be any one or several types of system information, and the specific system information may be specified by the protocol. By way of example, the specific system information may be, for example, emergency notification system information (i.e., SIB7 / 8 / 9) and / or positioning system information, etc. Further, by way of example, when the second RRC message is the above-mentioned RRC reconfiguration message, the second RRC message may carry the specific configuration.

[0173] Further, in an embodiment of the present disclosure, when the remote UE stops the active state, the remote UE will stop listening to the SL between the remote UE and the relay UE, thereby saving power consumption.

[0174] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen from this that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE to the first message sent by the remote UE, will it stop the active state, thereby avoiding the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection reconstruction process to be successfully executed, and avoiding causing the system information to be sent late, ensuring the communication stability of the SL.

[0175] Figure 3 It is a schematic flow chart of a message transmission method provided by an embodiment of the present disclosure. This method is executed by a remote UE, as Figure 3 shown, the message transmission method may include the following steps:

[0176] Step 301: Send a first message to the relay UE.

[0177] Step 302: After sending the first message to the relay UE, the remote UE immediately enters the active state.

[0178] Step 303: In response to receiving the second message, the remote UE stops the active state. The second message is a response message to the first message.

[0179] Among them, for the detailed introduction of steps 301-303, reference can be made to the above-described embodiments, and the embodiments of the present disclosure will not be elaborated herein.

[0180] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE to the first message sent by the remote UE, will it stop the active state, thereby avoiding the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection reconstruction process to be successfully executed, and avoiding the delay in sending system information, ensuring the communication stability of SL.

[0181] Figure 4 It is a schematic flowchart of a message transmission method provided by the embodiments of the present disclosure. This method is executed by the remote UE, as Figure 4 shown, this message transmission method may include the following steps:

[0182] Step 401: Send a first message to the relay UE.

[0183] Step 402: After sending the first message to the relay UE, start a timer.

[0184] Step 403: In response to the timeout of the timer, the remote UE enters the active state.

[0185] Among them, in an embodiment of the present disclosure, after the remote UE enters the active state, the remote UE will monitor the SL link so that the remote UE can successfully receive the response message to the first message sent by the relay UE subsequently.

[0186] Also, it should be noted that after the remote UE sends the first message, the first message needs to be transmitted to the relay UE first, and the relay UE forwards the first message to the base station. After the base station parses the first message and generates a response message for the first message, it is then sent to the relay UE for forwarding to the remote UE. From this, it can be seen that after the remote UE sends the first message, it will not immediately receive the response message for the first message, but will have to wait for a period of time before it can receive the response message for the first message. Based on this, in an embodiment of the present disclosure, after the remote UE sends the first message, it does not need to immediately enter the active state, but first times out for a period of time based on a timer. When the timer times out, the remote UE then delays entering the active state, thereby shortening the time the remote UE is in the active state and saving power. Also, in an embodiment of the present disclosure, the timing duration of the timer satisfies the following condition: the timing duration is less than or equal to the round trip time (RTT) of the first message. Thus, when the remote UE delays entering the active state after the timer times out, there will be no situation of missing the response message, ensuring that the response message for the first message sent by the relay UE can be successfully received.

[0187] Specifically, in an embodiment of the present disclosure, the above-mentioned timer duration should include any one of the following:

[0188] The running time of the T300 timer;

[0189] The running time of the T301 timer;

[0190] The running time of the T319 timer;

[0191] The running time of the T319a timer.

[0192] Furthermore, in an embodiment of the present disclosure, the timing duration of the timer can be configured by the network device to the remote UE. In another embodiment of the present disclosure, the timing duration of the timer can also be configured by the relay UE to the remote UE. Among them, when the timing duration of the timer is configured by the network device, it can be configured through an RRC message; when the timing duration of the timer is configured by the relay UE, it can be configured through a sidelink RRC message.

[0193] Step 404, in response to receiving the second message, the remote UE stops the active state. Wherein, the second message is the response message for the first message.

[0194] Among them, for other detailed introductions of steps 401-404, reference can be made to the above-mentioned embodiment descriptions, and the embodiments of the present disclosure will not be elaborated herein.

[0195] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when it receives the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen from this that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE to the first message sent by the remote UE will it stop the active state. This can avoid the situation where "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, so that the connection establishment / connection recovery / connection reconstruction process can be successfully executed, and the delay in sending system information can be avoided, ensuring the communication stability of the SL.

[0196] Figure 5 FIG. is a schematic flow chart of a message transmission method provided by an embodiment of the present disclosure. This method is executed by a relay UE, as Figure 5 shown, the message transmission method may include the following steps:

[0197] Step 501, receive a first message sent by a remote UE.

[0198] Step 502, forward the first message to the base station;

[0199] Step 503, receive a second message sent by the base station; where the second message is a response message to the first message;

[0200] Step 504, forward the second message to the relay UE.

[0201] Among them, for a detailed introduction to steps 501-504, reference may be made to the description of the above embodiments.

[0202] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when it receives the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE for the first message sent by the remote UE, will it stop the active state. This can avoid the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, so that the connection establishment / connection recovery / connection reconstruction process can be successfully executed, and avoid causing the system information to be sent late, ensuring the communication stability of SL.

[0203] Figure 6 It is a schematic flowchart of a message transmission method provided by an embodiment of the present disclosure. This method is executed by the relay UE, as Figure 6 shown, the message transmission method may include the following steps:

[0204] Step 601, configure the timing duration of the timer for the remote UE.

[0205] For the detailed introduction of step 601, reference can be made to the description in the above embodiments.

[0206] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when it receives the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE for the first message sent by the remote UE, will it stop the active state. This can avoid the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, so that the connection establishment / connection recovery / connection reconstruction process can be successfully executed, and avoid causing the system information to be sent late, ensuring the communication stability of SL.

[0207] Figure 7 It is a schematic flowchart of a message transmission method provided by an embodiment of the present disclosure. This method is executed by the base station, as Figure 7 shown, the message transmission method may include the following steps:

[0208] Step 701: Receive the first message sent by the relay UE;

[0209] Step 702: Send a second message to the relay UE; wherein, the second message is a response message to the first message.

[0210] For the detailed introduction of steps 701 - 702, reference can be made to the description of the above embodiments.

[0211] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends the first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen from this that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE to the first message sent by the remote UE, will it stop the active state. This can avoid the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", thus ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection reconstruction process to be successfully executed, avoiding the delay in sending system information, and ensuring the communication stability of the SL.

[0212] Figure 8 It is a schematic flowchart of a message transmission method provided by the embodiments of the present disclosure. This method is executed by the base station, as Figure 8 shown. This message transmission method may include the following steps:

[0213] Step 801: Configure the timing duration of the timer for the remote UE.

[0214] For the detailed introduction of step 801, reference can be made to the description of the above embodiments.

[0215] In summary, in the message transmission method provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen from this that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) from the relay UE for the first message sent by the remote UE will it stop the active state. This can avoid the situation where "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", thus ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection re-establishment process to be successfully executed, and avoiding causing the system information to be sent late, ensuring the communication stability of SL.

[0216] Figure 9 The following is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure, as Figure 9 shown, the device may include:

[0217] A transceiver module 901, configured to send a first message to the relay UE;

[0218] A processing module 902, configured to enable the remote UE to monitor the sidelink SL between the remote UE and the relay UE in the active state;

[0219] The processing module 902 is further configured to, in response to receiving the second message, enable the remote UE to stop the active state; where the second message is a response message to the first message.

[0220] In summary, in the communication device provided by the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen from this that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) from the relay UE for the first message sent by the remote UE will it stop the active state. This can avoid the situation where "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", thus ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection re-establishment process to be successfully executed, and avoiding causing the system information to be sent late, ensuring the communication stability of SL.

[0221] Optionally, in one embodiment of the present disclosure, the processing module is further configured to:

[0222] After sending the first message to the relay UE, the remote UE immediately enters the active state.

[0223] Optionally, in one embodiment of the present disclosure, the processing module is further configured to:

[0224] After sending the first message to the relay UE, start a timer;

[0225] In response to the timeout of the timer, the remote UE enters the active state.

[0226] Optionally, in one embodiment of the present disclosure, the device is further configured to perform at least one of the following:

[0227] Receive the timing duration configured by the network device for the timer;

[0228] Receive the timing duration configured by the relay UE for the timer.

[0229] Optionally, in one embodiment of the present disclosure, the holding time of the UE active state includes any one of the following:

[0230] The running time of the T300 timer;

[0231] The running time of the T301 timer;

[0232] The running time of the T319 timer;

[0233] The running time of the T319a timer.

[0234] Optionally, in one embodiment of the present disclosure, the first message includes at least one of the following:

[0235] A message in a specific bearer;

[0236] A message in a specific logical channel;

[0237] The first Radio Resource Control (RRC) message;

[0238] The first RRC message carrying a specific request;

[0239] The first SL RRC message;

[0240] The first SL RRC message carrying a specific request.

[0241] Optionally, in one embodiment of the present disclosure, the second message includes at least one of the following:

[0242] A message in a specific bearer;

[0243] Message in a specific logical channel;

[0244] Second RRC message;

[0245] Second RRC message carrying a specific configuration;

[0246] Second SL RRC message;

[0247] Second SL RRC message carrying a specific configuration.

[0248] Optionally, in an embodiment of the present disclosure, the specific bearer includes at least one of the following:

[0249] Signaling Radio Bearer SRB0;

[0250] SRB1;

[0251] SRB2.

[0252] Optionally, in an embodiment of the present disclosure, the first RRC message includes at least one of the following:

[0253] RRC establishment request message;

[0254] RRC resume request message;

[0255] RRC re - establishment request message;

[0256] System information request message.

[0257] Optionally, in an embodiment of the present disclosure, the first SL RRC message includes the Remote UE Information Sidelink message.

[0258] Optionally, in an embodiment of the present disclosure, the specific request includes a request for requesting specific system information.

[0259] Optionally, in an embodiment of the present disclosure, the second RRC message includes at least one of the following:

[0260] RRC establishment message;

[0261] RRC resume message;

[0262] RRC re - establishment message;

[0263] RRC re - configuration message.

[0264] Optionally, in an embodiment of the present disclosure, the second SL RRC message includes the Uu Message Transfer Sidelink message.

[0265] Optionally, in one embodiment of the present disclosure, the specific configuration includes specific system information.

[0266] Optionally, in one embodiment of the present disclosure, the specific system information is specified by a protocol.

[0267] Figure 10 The following is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure. As Figure 10 shown, the device may include:

[0268] A transceiver module 1001, configured to receive a first message sent by a remote UE;

[0269] The transceiver module is further configured to forward the first message to a base station;

[0270] The transceiver module is further configured to receive a second message sent by the base station; wherein, the second message is a response message to the first message;

[0271] The transceiver module is further configured to forward the second message to the relay UE.

[0272] In summary, in the communication device provided by the embodiment of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter an active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen that in the embodiment of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE for the first message sent by the remote UE, will it stop the active state. This can avoid the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", thus ensuring the successful reception of the response message (i.e., the second message) by the remote UE, so that the connection establishment / connection recovery / connection reconstruction process can be successfully executed, and it is avoided to cause the delay in sending system information, ensuring the communication stability of the SL.

[0273] Optionally, in one embodiment of the present disclosure, the device:

[0274] Configures the timing duration of a timer for the remote UE.

[0275] Figure 11 The following is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure. As Figure 11 shown, the device may include:

[0276] A transceiver module 1101, configured to receive a first message sent by a relay UE;

[0277] The transceiver module is further configured to send a second message to the relay UE; wherein, the second message is a response message to the first message.

[0278] In summary, in the communication device provided in the embodiments of the present disclosure, after the remote UE sends a first message to the relay UE, it will enter the active state. After that, when receiving the second message sent by the relay UE, it will stop the active state, where the second message is a response message to the first message. It can be seen that in the embodiments of the present disclosure, only when the remote UE receives the response message (i.e., the second message) of the relay UE to the first message sent by the remote UE, will it stop the active state, thereby avoiding the situation that "after the remote UE sends the first message to the relay UE, the remote UE enters the SL DRX sleep state, resulting in the remote UE being unable to receive the response message sent by the relay UE", ensuring the successful reception of the response message (i.e., the second message) by the remote UE, enabling the connection establishment / connection recovery / connection reconstruction process to be successfully executed, avoiding the delay in sending system information, and ensuring the communication stability of the SL.

[0279] Optionally, in an embodiment of the present disclosure, the device:

[0280] Configures the timing duration of a timer for the remote UE.

[0281] Please refer to Figure 12 , Figure 12 FIG. 1200 is a schematic structural diagram of a communication device 1200 provided in an embodiment of the present application. The communication device 1200 may be a network device, a terminal device, a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device can be used to implement the method described in the above method embodiments, and specific reference can be made to the descriptions in the above method embodiments.

[0282] The communication device 1200 may include one or more processors 1201. The processor 1201 may be a general-purpose processor or a special-purpose processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute computer programs, and process the data of computer programs.

[0283] Optionally, the communication device 1200 may further include one or more memories 1202, on which a computer program 1204 may be stored. The processor 1201 executes the computer program 1204 to cause the communication device 1200 to execute the methods described in the above method embodiments. Optionally, data may also be stored in the memory 1202. The communication device 1200 and the memory 1202 may be provided separately or integrated together.

[0284] Optionally, the communication device 1200 may further include a transceiver 1205 and an antenna 1206. The transceiver 1205 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing the transceiver function. The transceiver 1205 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., for implementing the receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing the transmitting function.

[0285] Optionally, the communication device 1200 may further include one or more interface circuits 1207. The interface circuit 1207 is used to receive code instructions and transmit them to the processor 1201. The processor 1201 runs the code instructions to cause the communication device 1200 to execute the methods described in the above method embodiments.

[0286] When the communication device 1200 is a remote UE: The transceiver 1205 is used to execute Figure 2 Steps 201 and 203 in Figure 3 Steps 301 and 303 in Figure 4 Steps 401 and 403 in Figure 2 The processor 1201 is used to execute step 202 in Figure 3 Step 302 in Figure 4 Step 402 in

[0287] When the communication device 1200 is a relay UE: The transceiver 1205 is used to execute the steps in Figure 5 and Figure 6 in

[0288] When the communication device 1200 is a base station: The transceiver 1205 is used to execute the steps in Figure 7 and Figure 8 in

[0289] In one implementation, the processor 1201 may include a transceiver for implementing the receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated together. The above transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above transceiver circuit, interface, or interface circuit may be used for signal transmission or transfer.

[0290] In one implementation, the processor 1201 may store a computer program 1203, which runs on the processor 1201 and enables the communication device 1200 to perform the method described in the above method embodiment. The computer program 1203 may be fixed in the processor 1201, in which case the processor 1201 may be implemented by hardware.

[0291] In one implementation, the communication device 1200 may include a circuit that can implement the functions of sending or receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in the present application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channelmetal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0292] The communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in the present application is not limited thereto, and the structure of the communication device may not be limited thereto. Figure 12 The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0293] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0294] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

[0295] (3) ASIC, such as modem;

[0296] (4) Modules that can be embedded in other devices;

[0297] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and so on;

[0298] (6) Others, and so on.

[0299] For the case where the communication device can be a chip or a chip system, reference can be made to Figure 13 the structural schematic diagram of the chip shown. Figure 13 The chip shown includes a processor 1301 and an interface 1302. Among them, the number of processors 1301 can be one or more, and the number of interfaces 1302 can be multiple.

[0300] Optionally, the chip further includes a memory 1303, and the memory 1303 is used to store necessary computer programs and data.

[0301] Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such a function is implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art can use various methods to implement the described function for each specific application, but such implementation should not be construed as exceeding the scope protected by the embodiments of the present application.

[0302] The present application also provides a readable storage medium, on which instructions are stored, and when the instructions are executed by a computer, the functions of any one of the above method embodiments are implemented.

[0303] The present application also provides a computer program product, and when the computer program product is executed by a computer, the functions of any one of the above method embodiments are implemented.

[0304] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of 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, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer program may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a high-definition digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0305] Those of ordinary skill in the art can understand that the various digital numbers such as the first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, nor do they represent the order of precedence.

[0306] At least one in this application can also be described as one or more. The multiple can be two, three, four, or more, and this application does not make any restrictions. In the embodiments of this application, for a technical feature, the technical features in this technical feature are distinguished by "first", "second", "third", "A", "B", "C", and "D", etc. There is no order of precedence or size order among the technical features described by the "first", "second", "third", "A", "B", "C", and "D".

[0307] The corresponding relationships shown in each table in this application can be configured or predefined. The values of the information in each table are only examples and can be configured as other values, which are not limited in this application. When configuring the corresponding relationships between the configuration information and each parameter, it is not necessarily required to configure all the corresponding relationships shown in each table. For example, in the tables in this application, the corresponding relationships shown in some rows can also not be configured. Another example is that appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also be other names understandable by the communication device, and the values or representation methods of the parameters can also be other values or representation methods understandable by the communication device. When implementing 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 maps, etc.

[0308] The predefined in this application can be understood as definition, pre - definition, storage, pre - storage, pre - negotiation, pre - configuration, solidification, or pre - firing.

[0309] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this text can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0310] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above - described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0311] As described above, the above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A message transmission method, characterized in that, the method is executed by a remote terminal device and includes: sending a first message to a relay UE; the remote UE enters an active state to listen for a sidelink SL between the remote UE and the relay UE; in response to receiving a second message, the remote UE stops the active state; wherein the second message is a response message to the first message; wherein, the remote UE entering the active state includes: after sending the first message to the relay UE, starting a timer; in response to the timer timing out, the remote UE enters the active state; the timing duration of the timer is less than or equal to the round-trip time of the first message.

2. The method according to claim 1, characterized in that, the method further includes at least one of the following: receiving the timing duration configured by a network device for the timer; receiving the timing duration configured by the relay UE for the timer.

3. The method according to claim 1, characterized in that, the holding time of the UE active state includes any one of the following: the running time of the T300 timer; the running time of the T301 timer; the running time of the T319 timer; the running time of the T319a timer.

4. The method according to claim 1, characterized in that, the first message includes at least one of the following: a message in a specific bearer; a message in a specific logical channel; a first radio resource control (RRC) message; a first RRC message carrying a specific request; a first SL RRC message; a first SL RRC message carrying a specific request.

5. The method according to claim 1, characterized in that, the second message includes at least one of the following: a message in a specific bearer; a message in a specific logical channel; a second RRC message; a second RRC message carrying a specific configuration; a second SL RRC message; a second SL RRC message carrying a specific configuration.

6. The method according to claim 4 or 5, characterized in that, the specific bearer includes at least one of the following: a signaling radio bearer (SRB0); SRB1; SRB2.

7. The method according to claim 4, characterized in that, the first RRC message includes at least one of the following: an RRC establishment request message; an RRC resume request message; an RRC reconstruction request message; a system information request message.

8. The method according to claim 4, characterized in that, the first SL RRC message includes a remote UE information message RemoteUEInformationSidelink.

9. The method according to claim 4, characterized in that, the specific request includes a request for requesting specific system information.

10. The method according to claim 5, characterized in that, the second RRC message includes at least one of the following: an RRC establishment message; an RRC resume message; an RRC reconstruction message; an RRC reconfiguration message.

11. The method according to claim 5, characterized in that, the second SL RRC message includes a Uu message forwarding message UuMessageTransferSidelink.

12. The method according to claim 5, characterized in that, the specific configuration includes specific system information.

13. The method according to claim 9 or 12, characterized in that, the specific system information is specified by a protocol.

14. A message transmission method, characterized in that, the method is executed by a relay UE and includes: receiving a first message sent by a remote UE; forwarding the first message to a base station; receiving a second message sent by the base station; wherein, the second message is a response message to the first message; forwarding the second message to the remote UE; wherein, after the first message is sent by the remote UE, the remote UE starts a timer; in response to the timeout of the timer, the remote UE enters an active state; the timing duration of the timer is less than or equal to the round-trip time of the first message; wherein, when the second message is forwarded to the remote UE, the remote UE stops the active state.

15. The method according to claim 14, characterized in that, the method further includes: configuring the timing duration of the timer for the remote UE.

16. A message transmission method, characterized in that, the method is executed by a base station and includes: receiving a first message sent by a relay UE; sending a second message to the relay UE; wherein, the second message is a response message to the first message; wherein, the first message is sent from a remote UE to the relay UE, and the second message is sent from the relay UE to the remote UE; wherein, after the first message is sent by the remote UE, the remote UE starts a timer; in response to the timeout of the timer, the remote UE enters an active state; the timing duration of the timer is less than or equal to the round-trip time of the first message; wherein, when the second message is forwarded to the remote UE, the remote UE stops the active state.

17. The method according to claim 16, characterized in that, the method further includes: configuring the timing duration of the timer for the remote UE.

18. A communication device, configured in a remote UE, comprising: a transceiver module, configured to send a first message to a relay UE; a processing module, configured to cause the remote UE to enter an active state to monitor a sidelink SL between the remote UE and the relay UE; the processing module is further configured to cause the remote UE to stop the active state in response to receiving a second message; wherein, the second message is a response message to the first message; wherein, the remote UE entering the active state includes: after sending the first message to the relay UE, starting a timer; in response to the timeout of the timer, the remote UE enters the active state; the timing duration of the timer is less than or equal to the round-trip time of the first message.

19. A communication device, configured in a relay UE, comprising: a transceiver module, configured to receive a first message sent by a remote UE; the transceiver module is further configured to forward the first message to a base station; the transceiver module is further configured to receive a second message sent by the base station; wherein, the second message is a response message to the first message; The transceiver module is further configured to forward the second message to the remote UE; Wherein, after the first message is sent by the remote UE, the remote UE starts a timer; in response to the expiration of the timer, the remote UE enters an active state; the timing duration of the timer is less than or equal to the round-trip time of the first message; Wherein, when the second message is forwarded to the remote UE, the remote UE stops the active state.

20. A communication device configured in a base station, comprising: A transceiver module, configured to receive a first message sent by a relay UE; The transceiver module is further configured to send a second message to the relay UE; wherein, the second message is a response message to the first message; Wherein, the first message is sent from a remote UE to the relay UE, and the second message is sent from the relay UE to the remote UE; Wherein, after the first message is sent by the remote UE, the remote UE starts a timer; in response to the expiration of the timer, the remote UE enters an active state; the timing duration of the timer is less than or equal to the round-trip time of the first message; Wherein, when the second message is forwarded to the remote UE, the remote UE stops the active state.

21. A communication device, characterized in that the device includes a processor and a memory, wherein, a computer program is stored in the memory, and the processor executes the computer program stored in the memory to enable the device to execute the method according to any one of claims 1 to 13, or the processor executes the computer program stored in the memory to enable the device to execute the method according to claim 14 or 15, or the processor executes the computer program stored in the memory to enable the device to execute the method according to claim 16 or 17.

22. A communication device, characterized in that comprising: A processor and an interface circuit, wherein the interface circuit is configured to receive code instructions and transmit them to the processor; the processor is configured to run the code instructions to execute the method according to any one of claims 1 to 13, or to run the code instructions to execute the method according to any one of claims 14 or 15, or to run the code instructions to execute the method according to any one of claims 16 or 17.

23. A computer-readable storage medium, configured to store instructions, which when executed, enable the method according to any one of claims 1 to 13 to be implemented, or when executed, enable the method according to any one of claims 14 or 15 to be implemented, or when executed, enable the method according to any one of claims 16 or 17 to be implemented.

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