Information transmission, acquisition method and network side device

Abstract

The application discloses an information transmission and acquisition method and a network side device, and belongs to the technical field of communication. The method comprises the following steps: in the case that at least one remote terminal establishes an RRC connection with a first network side device through a relay terminal, the first network side device maintains terminal context information; in the case that the terminal context information is context information of the relay terminal, the terminal context information comprises first related information of a remote terminal served by the relay terminal; and / or in the case that the terminal context information is context information of a remote terminal, the terminal context information comprises second related information of a relay terminal providing relay service for the remote terminal. The application enables the RRC connection of the Remote UE to be quickly recovered in the case that the connection fails in any section of the PC5 interface connection link and the Uu interface connection link, thereby guaranteeing the reliability of relay communication.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to an information transmission and acquisition method and a network-side device. Background Technology

[0002] In scenarios where a remote UE establishes a Radio Resource Control (RRC) connection with a base station through a relay UE, the RRC connection of the remote UE is affected by two links: the PC5 interface connection link and the Uu interface connection link. When the RRC connection of the remote UE fails in either of these two links, the RRC connection of the remote UE is difficult to recover quickly. Summary of the Invention

[0003] This application provides an information transmission and acquisition method and a network-side device that can solve the problem of difficulty in quickly recovering when the RRC link connection of a RemoteUE fails.

[0004] Firstly, an information transmission method is provided, including:

[0005] When at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal, the first network-side device maintains the terminal context information.

[0006] When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information about the remote terminal served by the relay terminal; and / or, when the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information about the relay terminal that provides relay services to the remote terminal.

[0007] Secondly, an information acquisition method is provided, including:

[0008] The second network-side device sends a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal.

[0009] The second network-side device obtains the feedback information sent by the first network-side device;

[0010] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0011] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0012] Thirdly, an information transmission device is provided, comprising:

[0013] The first processing module is used to maintain terminal context information when at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal.

[0014] When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information about the remote terminal served by the relay terminal; and / or, when the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information about the relay terminal that provides relay services to the remote terminal.

[0015] Fourthly, an information acquisition device is provided, comprising:

[0016] The second sending module is used to send a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal.

[0017] The second receiving module is used to obtain feedback information sent by the first network-side device;

[0018] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0019] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0020] Fifthly, a network-side device is provided, the network-side device including a processor, a memory, 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 of the method as described in the first aspect, or implement the steps of the method as described in the second aspect.

[0021] In a sixth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0022] In a seventh aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0023] In this embodiment, the first network-side device maintains the context of the remote UE and / or relay terminal. The context of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal, and the context of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal. This enables the Remote UE's RRC connection to be quickly restored in the event of a connection failure in either the PC5 interface connection link or the Uu interface connection link, thus ensuring the reliability of relay communication. Attached Figure Description

[0024] Figure 1 This diagram illustrates the structure of a communication system to which embodiments of this application can be applied.

[0025] Figure 2 A flowchart illustrating an embodiment of the information transmission method of this application;

[0026] Figure 3 A flowchart illustrating the information acquisition method according to an embodiment of this application;

[0027] Figure 4 This is one of the schematic diagrams illustrating the interaction between the network-side device and the terminal in an embodiment of this application;

[0028] Figure 5 This is the second schematic diagram illustrating the interaction between the network-side device and the terminal in this application embodiment;

[0029] Figure 6 A schematic diagram of the modules of an information transmission device according to an embodiment of this application;

[0030] Figure 7A schematic diagram of the modules of the information acquisition device according to an embodiment of this application;

[0031] Figure 8 A structural block diagram illustrating a communication device according to an embodiment of this application;

[0032] Figure 9 This is a structural block diagram illustrating the network-side device according to an embodiment of this application. Detailed Implementation

[0033] 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.

[0034] 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 use of data can be interchanged 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.

[0035] 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 with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. However, 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) radio systems. th Generation 6G communication system.

[0036] To enable those skilled in the art to better understand the embodiments of the present invention, the sidelink relay will be described below.

[0037] Relay technology in wireless communication systems involves adding one or more relay nodes between the base station and the terminal, which are responsible for forwarding the wireless signal one or more times. In other words, the wireless signal has to go through multiple hops before it reaches the terminal.

[0038] Wireless relay technology can not only extend cell coverage and fill coverage gaps, but also increase cell capacity through spatial resource reuse. For indoor coverage, relay technology can also overcome penetration loss and improve indoor coverage quality.

[0039] Taking a simple two-hop relay as an example, wireless relay splits a link from a base station to a terminal into two links: one from the base station to the relay station and the other from the relay station to the terminal. This allows a link with poor quality to be replaced with two links with better quality, thereby achieving higher link capacity and better coverage.

[0040] like Figure 1As shown, one end of the relay terminal 13 is connected to the remote terminal 11, and the other end is connected to the network-side device 12. The remote terminal 11 can also be referred to as a terminal device or user equipment (UE). The remote 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), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include wristbands, headphones, glasses, etc. It should be noted that the specific type of remote terminal is not limited in this embodiment. Network-side device 12 can be a base station or core network device. The base station can be referred to as Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), B Node, Evolved B Node (eNB), Home B Node, Home Evolved B Node, WLAN Access Point, WiFi Node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0041] The information transmission method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0042] like Figure 2 As shown in the figure, this application provides an information transmission method, including:

[0043] Step 201: When at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal, the first network-side device maintains the terminal context information;

[0044] When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information about the remote terminal served by the relay terminal; and / or, when the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information about the relay terminal that provides relay services to the remote terminal.

[0045] Optionally, the first relevant information includes at least one of the following:

[0046] The identification information of at least one remote terminal can be any form, such as source L2 ID, destination L2 ID, cell radio network temporary identifier (C-RNTI), or local index assigned by the Relay UE.

[0047] First configuration information associated with each of the aforementioned identification information;

[0048] The first configuration information includes at least one of the following:

[0049] Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel;

[0050] The mapping from the first interface RLC channel to the remote terminal bearer;

[0051] The mapping from the first interface RLC channel to the relay terminal;

[0052] The mapping from the second interface RLC channel to the remote terminal bearer;

[0053] The mapping from the second interface RLC channel to the relay terminal;

[0054] The first interface RLC channel configuration, which may specifically be a PC5 interface, includes at least one of the following: PC5 RLC channel ID, PC5 physical layer (PC5 PHY layer), MAC layer, and RLC layer configuration.

[0055] The second interface RLC channel configuration, which may specifically be a Uu interface, includes at least one of the following: Uu RLC channel identifier (Uu RLC channel ID), Uu PHY layer, MAC layer, and RLC layer configuration;

[0056] The remote terminal bearer configuration includes at least one of the following: Uu bearer ID, Uu SDAP layer, Uu PDCP layer, and PC5RLC channel configuration;

[0057] The relay terminal bearer configuration includes at least one of the following: Uu bearer ID, Uu SDAP layer, Uu PDCP layer, and Uu RLC channel configuration;

[0058] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0059] Optionally, the second relevant information includes at least one of the following:

[0060] The identification information of at least one relay terminal, which can be any form such as source L2 ID, destination L2 ID, C-RNTI, local index assigned to the remote UE, etc.

[0061] Second configuration information associated with each of the aforementioned identification information;

[0062] The second configuration information includes at least one of the following:

[0063] Mapping from the first interface RLC channel to the second interface RLC channel;

[0064] The mapping from the first interface RLC channel to the remote terminal bearer;

[0065] The mapping from the first interface RLC channel to the relay terminal;

[0066] The mapping from the second interface RLC channel to the remote terminal bearer;

[0067] The mapping from the second interface RLC channel to the relay terminal;

[0068] The first interface RLC channel configuration, which may specifically be a PC5 interface, includes at least one of the following: PC5 RLC channel ID, PC5 PHY layer, MAC layer, and RLC layer configuration.

[0069] The second interface RLC channel configuration, which may specifically be a Uu interface, includes at least one of the following: Uu RLC channel ID, Uu PHY layer, MAC layer, RLC layer, and RLC channel ID configuration.

[0070] The remote terminal bearer configuration may include at least one of the following: Uu bearer ID, Uu SDAP layer, Uu PDCP layer, and PC5 RLC channel configuration;

[0071] The relay terminal bearer configuration may include at least one of the following: Uu bearer ID, Uu SDAP layer, Uu PDCP layer, and Uu RLC channel configuration;

[0072] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0073] In this embodiment, the first network-side device maintains the context of the remote UE and / or relay terminal. The context of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal, and the context of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal. This enables the Remote UE's RRC connection to recover quickly in the event of a connection failure in either the PC5 interface connection link or the Uu interface connection link, thus ensuring the reliability of relay communication.

[0074] Optionally, the method in this application embodiment further includes:

[0075] The first network-side device receives a terminal context acquisition request sent by the second network-side device, wherein the terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal;

[0076] The first network-side device sends feedback information to the second network-side device;

[0077] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0078] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0079] Optionally, the first information mentioned above can be an RRC reconstruction request or an RRC connection recovery request.

[0080] In this embodiment, the first network-side device maintains the context of the remote UE and / or relay terminal. The context of the remote terminal includes second relevant information of the relay terminal that provides relay services to the remote terminal, and the context of the relay terminal includes first relevant information of the remote terminal that the relay terminal serves. The device can send at least one of the contexts of the remote terminal and the relay terminal to the second network-side device, so that the RRC connection of the Remote UE can be quickly restored in the event of a connection failure in either the PC5 interface connection link or the Uu interface connection link, thus ensuring the reliability of relay communication.

[0081] like Figure 3 As shown in the embodiments of this application, an information acquisition method is also provided, including:

[0082] Step 301: The second network-side device sends a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal.

[0083] Step 302: The second network-side device obtains the feedback information sent by the first network-side device;

[0084] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0085] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0086] In this embodiment, the first network-side device maintains the context of the remote UE and / or relay terminal. The context of the remote terminal includes second relevant information of the relay terminal that provides relay services to the remote terminal, and the context of the relay terminal includes first relevant information of the remote terminal that the relay terminal serves. The device can send at least one of the contexts of the remote terminal and the relay terminal to the second network-side device, so that the RRC connection of the Remote UE can be quickly restored in the event of a connection failure in either the PC5 interface connection link or the Uu interface connection link, thus ensuring the reliability of relay communication.

[0087] Optionally, the first relevant information includes at least one of the following:

[0088] Identification information of at least one remote terminal;

[0089] First configuration information associated with each of the aforementioned identification information;

[0090] The first configuration information includes at least one of the following:

[0091] Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel;

[0092] The mapping from the first interface RLC channel to the remote terminal bearer;

[0093] The mapping from the first interface RLC channel to the relay terminal;

[0094] The mapping from the second interface RLC channel to the remote terminal bearer;

[0095] The mapping from the second interface RLC channel to the relay terminal;

[0096] First interface RLC channel configuration;

[0097] Second interface RLC channel configuration;

[0098] The remote terminal bearer configuration;

[0099] The relay terminal bearer configuration;

[0100] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0101] Optionally, the second relevant information includes at least one of the following:

[0102] Identification information of at least one relay terminal;

[0103] Second configuration information associated with each of the aforementioned identification information;

[0104] The second configuration information includes at least one of the following:

[0105] Mapping from the first interface RLC channel to the second interface RLC channel;

[0106] The mapping from the first interface RLC channel to the remote terminal bearer;

[0107] The mapping from the first interface RLC channel to the relay terminal;

[0108] The mapping from the second interface RLC channel to the remote terminal bearer;

[0109] The mapping from the second interface RLC channel to the relay terminal;

[0110] First interface RLC channel configuration;

[0111] Second interface RLC channel configuration;

[0112] The remote terminal bearer configuration;

[0113] The relay terminal bearer configuration;

[0114] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0115] It should be noted that the first relevant information mentioned above is the same as the first relevant information in the above information transmission method embodiment, and the second relevant information mentioned above is the same as the second relevant information in the above information transmission method embodiment, and will not be repeated here.

[0116] Optionally, when the first terminal is a relay terminal, after the second network-side device obtains the feedback information sent by the first network-side device, it further includes:

[0117] The second network-side device sends a first RRC reconfiguration to the remote terminal served by the first terminal. The first RRC reconfiguration includes an incremental configuration (delta configuration) generated based on the context of the remote terminal.

[0118] Optionally, when the feedback information is terminal context acquisition failure information and the first terminal is a relay terminal, after the second network-side device acquires the feedback information sent by the first network-side device, it further includes:

[0119] The second network-side device sends a second RRC reconfiguration to the remote terminal served by the first terminal. The second RRC reconfiguration includes a full configuration.

[0120] Optionally, when the first terminal is a remote terminal, after the second network-side device obtains the feedback information sent by the first network-side device, it further includes:

[0121] The second network-side device sends a third RRC reconfiguration to the relay terminal that provides services to the first terminal. The third RRC reconfiguration includes an incremental configuration generated based on the context of the relay terminal.

[0122] Optionally, when the feedback information is terminal context acquisition failure information and the first terminal is a remote terminal, after the second network-side device acquires the feedback information sent by the first network-side device, it further includes:

[0123] The second network-side device sends a fourth RRC reconfiguration to the relay terminal that provides services to the first terminal. The fourth RRC reconfiguration includes a full configuration.

[0124] In this embodiment, the first network-side device maintains the context of the remote UE and / or relay terminal. The context of the remote terminal includes second relevant information of the relay terminal that provides relay services to the remote terminal, and the context of the relay terminal includes first relevant information of the remote terminal that the relay terminal serves. The device can send at least one of the contexts of the remote terminal and the relay terminal to the second network-side device, so that the RRC connection of the Remote UE can be quickly restored in the event of a connection failure in either the PC5 interface connection link or the Uu interface connection link, thus ensuring the reliability of relay communication.

[0125] The present application will now be described with reference to specific embodiments.

[0126] Example 1: When both the Remote UE and the Relay UE are in the RRC Connected state, the network side defines the method for maintaining the Relay UE context.

[0127] like Figure 4 As shown, the method of this application includes:

[0128] Step 401: When at least one Remote UE establishes an RRC connection with the source serving base station through the Relay UE, the source serving base station maintains the context information of the Relay UE.

[0129] The context information of the Relay UE includes the first relevant information about the Remote UE served by the Relay UE.

[0130] Step 402: The Relay UE initiates an RRC reconstruction request to the target base station through the Uu interface.

[0131] Step 403: The target base station initiates a UE context acquisition request to the source serving base station.

[0132] Step 4041: The source serving base station sends a UE context acquisition response to the target base station. The UE context acquisition response carries the first relevant information of the Remote UE served by the Relay UE.

[0133] Step 4042: The source serving base station sends a terminal context acquisition failure message to the target base station.

[0134] Step 4051: The target base station sends an RRC reconstruction to the Relay UE.

[0135] In step 4051, the Relay UE sends an RRC reconstruction completion message to the target UE.

[0136] Step 4052: The target base station sends an RRC connection establishment message to the Relay UE.

[0137] In step 4052, the Relay UE sends an RRC connection establishment completion message to the target base station.

[0138] Step 4061: The target base station sends an RRC reconfiguration to the remote UE served by the Relay UE. This RRC reconfiguration carries the delta configuration.

[0139] In step 4061, the Remote UE sends an RRC reconfiguration completion message to the target base station.

[0140] Step 4062: The target base station sends an RRC reconfiguration to the Remote UE served by the Relay UE. This RRC reconfiguration carries the full configuration.

[0141] In step 4062, the Remote UE sends an RRC reconfiguration completion message to the target base station.

[0142] It should be noted that steps 4041 and 4042 are parallel steps, steps 4051 and 4052 are parallel steps, and steps 4061 and 4062 are parallel steps. After step 4041 is executed, steps 4051 and 4061 are executed. After step 4042 is executed, steps 4052 and 4062 are executed.

[0143] In addition, when the Remote UE is in the RRC Connected state and the Relay UE is in the RRC Inactive state, Implementation Example 1 can be reused, except that the section describing RRC reconstruction in the Relay UE is replaced with RRC resume (connection restoration).

[0144] Example 2: When both the Remote UE and the Relay UE are in the RRC Connected state, the network side defines the method for maintaining the Remote UE context.

[0145] like Figure 5 As shown, the method of this application includes:

[0146] Step 501: When at least one Remote UE establishes an RRC connection with the source serving base station through the Relay UE, the source serving base station maintains the context information of the Remote UE.

[0147] The context information of the Remote UE includes a second set of relevant information about the Relay UE that provides relay services for the Remote UE.

[0148] Step 502: The Remote UE initiates an RRC reconstruction request to the target base station through the Uu interface.

[0149] Step 503: The target base station initiates a UE context acquisition request to the source serving base station.

[0150] Step 5041: The source serving base station sends a UE context acquisition response to the target base station. The UE context acquisition response carries second relevant information about the Relay UE that provides relay services for the Remote UE.

[0151] Step 5042: The source serving base station sends a terminal context acquisition failure message to the target base station.

[0152] Step 5051: The target base station sends an RRC reconstruction to the Remote UE.

[0153] In step 5051, the Remote UE sends an RRC reconstruction completion message to the target UE.

[0154] Step 5052: The target base station sends an RRC connection establishment message to the Remote UE.

[0155] In step 5052, the Remote UE sends an RRC connection establishment completion message to the target base station.

[0156] Step 5061: The target base station sends an RRC reconfiguration to the Relay UE that provides services to the Remote UE. The RRC reconfiguration carries the delta configuration.

[0157] In step 5061, the Relay UE sends an RRC reconfiguration completion message to the target base station.

[0158] Step 5062: The target base station sends an RRC reconfiguration to the Relay UE that provides services to the Remote UE. The RRC reconfiguration carries the full configuration.

[0159] In step 5062, the Relay UE sends an RRC reconfiguration completion message to the target base station.

[0160] It should be noted that steps 5041 and 5042 are parallel steps, steps 5051 and 5052 are parallel steps, and steps 5061 and 5062 are parallel steps. After step 5041 is executed, steps 5051 and 5061 are executed. After step 5042 is executed, steps 5052 and 5062 are executed.

[0161] In addition, when the Remote UE is in the RRC Inactive state and the Relay UE is in the RRC Connected state, Implementation Example 2 can be reused, except that the part describing RRC reconstruction in the Remote UE is replaced with RRC resume (connection restoration).

[0162] In this invention, the context maintenance method of the source serving base station for the Remote UE and / or Relay UE enables the Remote UE's RRC connection to recover quickly in the event of a connection failure in either PC5 or Uu, thus ensuring the reliability of relay communication.

[0163] It should be noted that the information transmission method provided in this application embodiment can be executed by an information transmission device, or by a control module within the information transmission device for executing the information transmission method. This application embodiment uses an information transmission device executing the information transmission method as an example to illustrate the information transmission device provided in this application embodiment.

[0164] like Figure 6 As shown, this application embodiment provides an information transmission device 600, including:

[0165] The first processing module 601 is used to maintain terminal context information when at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal.

[0166] When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information about the remote terminal served by the relay terminal; and / or, when the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information about the relay terminal that provides relay services to the remote terminal.

[0167] Optionally, the apparatus in this application embodiment further includes:

[0168] The determination module is used to determine whether the remote terminal has established an RRC connection with the first network-side device through the relay terminal.

[0169] Optionally, the apparatus in this application embodiment further includes:

[0170] The first receiving module is used to receive a terminal context acquisition request sent by the second network-side device, wherein the terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal;

[0171] The first sending module is used to send feedback information to the second network-side device;

[0172] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0173] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0174] Optionally, the first relevant information includes at least one of the following:

[0175] Identification information of at least one remote terminal;

[0176] First configuration information associated with each of the aforementioned identification information;

[0177] The first configuration information includes at least one of the following:

[0178] Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel;

[0179] The mapping from the first interface RLC channel to the remote terminal bearer;

[0180] The mapping from the first interface RLC channel to the relay terminal;

[0181] The mapping from the second interface RLC channel to the remote terminal bearer;

[0182] The mapping from the second interface RLC channel to the relay terminal;

[0183] First interface RLC channel configuration;

[0184] Second interface RLC channel configuration;

[0185] The remote terminal bearer configuration;

[0186] The relay terminal bearer configuration;

[0187] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0188] Optionally, the second relevant information includes at least one of the following:

[0189] Identification information of at least one relay terminal;

[0190] Second configuration information associated with each of the aforementioned identification information;

[0191] The second configuration information includes at least one of the following:

[0192] Mapping from the first interface RLC channel to the second interface RLC channel;

[0193] The mapping from the first interface RLC channel to the remote terminal bearer;

[0194] The mapping from the first interface RLC channel to the relay terminal;

[0195] The mapping from the second interface RLC channel to the remote terminal bearer;

[0196] The mapping from the second interface RLC channel to the relay terminal;

[0197] First interface RLC channel configuration;

[0198] Second interface RLC channel configuration;

[0199] The remote terminal bearer configuration;

[0200] The relay terminal bearer configuration;

[0201] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0202] The information transmission device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0203] It should be noted that the information acquisition method provided in this application embodiment can be executed by an information acquisition device, or by a control module within the information acquisition device for executing the information acquisition method. This application embodiment uses the execution of the information acquisition method by an information acquisition device as an example to illustrate the information acquisition device provided in this application embodiment.

[0204] like Figure 7 As shown, this application embodiment provides an information acquisition device 700, including:

[0205] The second sending module 701 is used to send a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first related information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second related information of the relay terminal that provides relay services to the remote terminal.

[0206] The second receiving module 702 is used to obtain feedback information sent by the first network-side device;

[0207] Wherein, when the feedback information is a terminal context acquisition response and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal.

[0208] Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes at least one of the context information of the remote terminal and the context information of the relay terminal.

[0209] Optionally, the first relevant information includes at least one of the following:

[0210] Identification information of at least one remote terminal;

[0211] First configuration information associated with each of the aforementioned identification information;

[0212] The first configuration information includes at least one of the following:

[0213] Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel;

[0214] The mapping from the first interface RLC channel to the remote terminal bearer;

[0215] The mapping from the first interface RLC channel to the relay terminal;

[0216] The mapping from the second interface RLC channel to the remote terminal bearer;

[0217] The mapping from the second interface RLC channel to the relay terminal;

[0218] First interface RLC channel configuration;

[0219] Second interface RLC channel configuration;

[0220] The remote terminal bearer configuration;

[0221] The relay terminal bearer configuration;

[0222] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0223] Optionally, the second relevant information includes at least one of the following:

[0224] Identification information of at least one relay terminal;

[0225] Second configuration information associated with each of the aforementioned identification information;

[0226] The second configuration information includes at least one of the following:

[0227] Mapping from the first interface RLC channel to the second interface RLC channel;

[0228] The mapping from the first interface RLC channel to the remote terminal bearer;

[0229] The mapping from the first interface RLC channel to the relay terminal;

[0230] The mapping from the second interface RLC channel to the remote terminal bearer;

[0231] The mapping from the second interface RLC channel to the relay terminal;

[0232] First interface RLC channel configuration;

[0233] Second interface RLC channel configuration;

[0234] The remote terminal bearer configuration;

[0235] The relay terminal bearer configuration;

[0236] The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

[0237] Optionally, the apparatus in this application embodiment further includes:

[0238] The third sending module is used to send a first RRC reconfiguration to a remote terminal served by the first terminal after the second network-side device obtains the feedback information sent by the first network-side device when the first terminal is a relay terminal. The first RRC reconfiguration includes an incremental configuration generated based on the context of the remote terminal.

[0239] Optionally, the apparatus in this application embodiment further includes:

[0240] The fourth sending module is used to send a second RRC reconfiguration to the remote terminal served by the first terminal after the second network-side device obtains the feedback information sent by the first network-side device, when the feedback information is terminal context acquisition failure information and the first terminal is a relay terminal. The second RRC reconfiguration includes a full configuration.

[0241] Optionally, the apparatus in this application embodiment further includes:

[0242] The fifth sending module is used to send a third RRC reconfiguration to the relay terminal providing services to the first terminal after the second network-side device obtains the feedback information sent by the first network-side device when the first terminal is a remote terminal. The third RRC reconfiguration includes an incremental configuration generated based on the context of the relay terminal.

[0243] Optionally, the apparatus in this application embodiment further includes:

[0244] The sixth sending module is used to send a fourth RRC reconfiguration to the relay terminal providing services to the first terminal after the second network-side device obtains the feedback information sent by the first network-side device, when the feedback information is terminal context acquisition failure information and the first terminal is a remote terminal. The fourth RRC reconfiguration includes a full configuration.

[0245] The information acquisition device provided in this application embodiment can achieve... Figure 3 The various processes implemented in the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0246] Optional, such as Figure 8 As shown, this application embodiment also provides a communication device 800, including a processor 801, a memory 802, and a program or instructions stored in the memory 802 and executable on the processor 801. For example, when the communication device 800 is a first network-side device, the program or instructions executed by the processor 801 implement the various processes of the above-described information transmission method embodiment and achieve the same technical effect. When the communication device 800 is a second network-side device, the program or instructions executed by the processor 801 implement the various processes of the above-described information acquisition method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0247] This application also provides a network-side device. For example... Figure 9 As shown, the network device 900 includes an antenna 901, a radio frequency (RF) device 902, and a baseband device 903. The antenna 901 is connected to the RF device 902. In the uplink direction, the RF device 902 receives information through the antenna 901 and transmits the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be transmitted and sends it to the RF device 902. The RF device 902 processes the received information and transmits it through the antenna 901.

[0248] The aforementioned frequency band processing device can be located in the baseband device 903. The method executed by the first network-side device or the second network-side device in the above embodiments can be implemented in the baseband device 903, which includes a processor 904 and a memory 905.

[0249] The baseband device 903 may, for example, include at least one baseband board on which multiple chips are disposed, such as... Figure 9 As shown, one of the chips, for example, is a processor 904, which is connected to a memory 905 to call the program in the memory 905 and execute the operation of the first network-side device or the second network-side device shown in the above method embodiment.

[0250] The baseband device 903 may also include a network interface 906 for exchanging information with the radio frequency device 902, such as a common public radio interface (CPRI).

[0251] Specifically, the network-side device in this embodiment of the invention further includes: instructions or programs stored in memory 905 and executable on processor 904, wherein processor 904 calls the instructions or programs in memory 905 to execute... Figure 6 Alternatively, the methods executed by each module shown in Figure 7 can achieve the same technical effect. To avoid repetition, they will not be described in detail here.

[0252] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described information transmission method or information acquisition method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0253] The processor mentioned above is the processor in the network-side device 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.

[0254] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described information transmission method or information acquisition method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0255] 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.

[0256] 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.

[0257] 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 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, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0258] 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. An information transmission method, characterized in that, include: When at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal, the first network-side device maintains the terminal context information. When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information of the remote terminal served by the relay terminal; And / or, if the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information of the relay terminal that provides relay services to the remote terminal; The information transmission method further includes: The first network-side device receives a terminal context acquisition request sent by the second network-side device, wherein the terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal; The first network-side device sends feedback information to the second network-side device; Wherein, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes the context information of the relay terminal.

2. The method according to claim 1, characterized in that, When the feedback information is a terminal context acquisition response, and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal. Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response may also include the context information of the remote terminal.

3. The method according to claim 1 or 2, characterized in that, The first relevant information includes at least one of the following: Identification information of at least one remote terminal; First configuration information associated with each of the aforementioned identification information; The first configuration information includes at least one of the following: Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

4. The method according to claim 1 or 2, characterized in that, The second relevant information includes at least one of the following: Identification information of at least one relay terminal; Second configuration information associated with each of the aforementioned identification information; The second configuration information includes at least one of the following: Mapping from the first interface RLC channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

5. An information acquisition method, characterized in that, include: The second network-side device sends a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal. The second network-side device obtains the feedback information sent by the first network-side device; Wherein, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes the context information of the relay terminal.

6. The method according to claim 5, characterized in that, The first relevant information includes at least one of the following: Identification information of at least one remote terminal; First configuration information associated with each of the aforementioned identification information; The first configuration information includes at least one of the following: Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

7. The method according to claim 5, characterized in that, The second relevant information includes at least one of the following: Identification information of at least one relay terminal; Second configuration information associated with each of the aforementioned identification information; The second configuration information includes at least one of the following: Mapping from the first interface RLC channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

8. The method according to claim 5, characterized in that, When the first terminal is a relay terminal, after the second network-side device receives the feedback information sent by the first network-side device, it further includes: The second network-side device sends a first RRC reconfiguration to the remote terminal served by the first terminal. The first RRC reconfiguration includes an incremental configuration generated based on the context of the remote terminal.

9. The method according to claim 5, characterized in that, When the feedback information is a terminal context acquisition failure message and the first terminal is a relay terminal, after the second network-side device acquires the feedback information sent by the first network-side device, it further includes: The second network-side device sends a second RRC reconfiguration to the remote terminal served by the first terminal. The second RRC reconfiguration includes a full configuration.

10. The method according to claim 5, characterized in that, When the first terminal is a remote terminal, after the second network-side device obtains the feedback information sent by the first network-side device, it further includes: The second network-side device sends a third RRC reconfiguration to the relay terminal that provides services to the first terminal. The third RRC reconfiguration includes an incremental configuration generated based on the context of the relay terminal.

11. The method according to claim 5, characterized in that, When the feedback information is a terminal context acquisition failure message and the first terminal is a remote terminal, after the second network-side device acquires the feedback information sent by the first network-side device, it further includes: The second network-side device sends a fourth RRC reconfiguration to the relay terminal that provides services to the first terminal. The fourth RRC reconfiguration includes a full configuration.

12. An information transmission device, characterized in that, include: The first processing module is used to maintain terminal context information when at least one remote terminal establishes an RRC connection with the first network-side device through a relay terminal. When the terminal context information is the context information of a relay terminal, the terminal context information includes first relevant information of the remote terminal served by the relay terminal; And / or, if the terminal context information is the context information of a remote terminal, the terminal context information includes second relevant information of the relay terminal that provides relay services to the remote terminal; The information transmission device further includes: The first receiving module is used to receive a terminal context acquisition request sent by the second network-side device, wherein the terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal; The first sending module is used to send feedback information to the second network-side device; Wherein, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes the context information of the relay terminal.

13. The apparatus according to claim 12, characterized in that, When the feedback information is a terminal context acquisition response, and the first terminal is a relay terminal, the terminal context acquisition response includes at least one of the context information of the relay terminal and the context information of the remote terminal. Alternatively, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response may also include the context information of the remote terminal.

14. The apparatus according to claim 12 or 13, characterized in that, The first relevant information includes at least one of the following: Identification information of at least one remote terminal; First configuration information associated with each of the aforementioned identification information; The first configuration information includes at least one of the following: Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

15. The apparatus according to claim 12 or 13, characterized in that, The second relevant information includes at least one of the following: Identification information of at least one relay terminal; Second configuration information associated with each of the aforementioned identification information; The second configuration information includes at least one of the following: Mapping from the first interface RLC channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

16. An information acquisition device, characterized in that, include: The second sending module is used to send a terminal context acquisition request to the first network-side device. The terminal context acquisition request is sent by the second network-side device after receiving the first information sent by the first terminal. The first network-side device maintains at least one of the context information of the relay terminal and the context information of the remote terminal. The context information of the relay terminal includes the first relevant information of the remote terminal served by the relay terminal, and the context information of the remote terminal includes the second relevant information of the relay terminal that provides relay services to the remote terminal. The second receiving module is used to obtain feedback information sent by the first network-side device; Wherein, if the feedback information is a terminal context acquisition response and the first terminal is a remote terminal, the terminal context acquisition response includes the context information of the relay terminal.

17. The apparatus according to claim 16, characterized in that, The first relevant information includes at least one of the following: Identification information of at least one remote terminal; First configuration information associated with each of the aforementioned identification information; The first configuration information includes at least one of the following: Mapping from the first interface radio link control (RLC) channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

18. The apparatus according to claim 16, characterized in that, The second relevant information includes at least one of the following: Identification information of at least one relay terminal; Second configuration information associated with each of the aforementioned identification information; The second configuration information includes at least one of the following: Mapping from the first interface RLC channel to the second interface RLC channel; The mapping from the first interface RLC channel to the remote terminal bearer; The mapping from the first interface RLC channel to the relay terminal; The mapping from the second interface RLC channel to the remote terminal bearer; The mapping from the second interface RLC channel to the relay terminal; First interface RLC channel configuration; Second interface RLC channel configuration; The remote terminal bearer configuration; The relay terminal bearer configuration; The first interface is a connection interface between the relay terminal and the remote terminal, and the second interface is a connection interface between the relay terminal and the network-side device.

19. The apparatus according to claim 16, characterized in that, Also includes: The third sending module is used to send a first RRC reconfiguration to a remote terminal served by the first terminal after the second network-side device obtains the feedback information sent by the first network-side device when the first terminal is a relay terminal. The first RRC reconfiguration includes an incremental configuration generated based on the context of the remote terminal.

20. The apparatus according to claim 16, characterized in that, Also includes: The fourth sending module is used to send a second RRC reconfiguration to the remote terminal served by the first terminal after the second network-side device obtains the feedback information sent by the first network-side device, when the feedback information is terminal context acquisition failure information and the first terminal is a relay terminal. The second RRC reconfiguration includes a full configuration.

21. The apparatus according to claim 16, characterized in that, Also includes: The fifth sending module is used to send a third RRC reconfiguration to the relay terminal providing services to the first terminal after the second network-side device obtains the feedback information sent by the first network-side device when the first terminal is a remote terminal. The third RRC reconfiguration includes an incremental configuration generated based on the context of the relay terminal.

22. The apparatus according to claim 16, characterized in that, Also includes: The sixth sending module is used to send a fourth RRC reconfiguration to the relay terminal providing services to the first terminal after the second network-side device obtains the feedback information sent by the first network-side device, when the feedback information is terminal context acquisition failure information and the first terminal is a remote terminal. The fourth RRC reconfiguration includes a full configuration.

23. A network-side device, characterized in that, It includes a processor, a memory, 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 of the information transmission method as described in any one of claims 1 to 4, or implement the steps of the information acquisition method as described in any one of claims 5 to 11.

24. 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 of the information transmission method as described in any one of claims 1 to 4, or the steps of the information acquisition method as described in any one of claims 5 to 11.

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