Method and device for configuring node data transmission and reception

Abstract

The present invention provides a method and device for configuring a node to send and receive data. A first node sends to a second node information for determining a channel used by the second node to send data received by the second node, and / or a message for determining a wireless bearer used by the second node to send data received by the second node. Through the above method and device, the mapping between the received data and the sent data of each node in a multi-hop network is realized.

Description

Technical Field

[0001] The present invention relates to wireless communication technology, and in particular to a method and a device for configuring a relay node. Background Art

[0002] In the NR (New Radio access) network or the fifth generation 5G network, in order to extend the coverage of the network, the IAB (Integrated Access and Backhaul) project is proposed. The main purpose of this project is to build a multi-hop network architecture. Figure 1The schematic architecture of a multi-hop network is shown in the figure. A network architecture including an anchor node and two relay nodes is given in the figure. All users finally communicate with the anchor node, wherein users N1~Nx communicate with the anchor node through relay node 2 and relay node 1, and users M1~My communicate with the anchor node through relay node 1. The anchor node can be composed of a centralized unit CU (central unit) and a distributed unit DU (distributed unit), wherein the interface between the centralized unit and the distributed unit is an F1 interface (see 3GPP TS38.473), and the centralized unit includes the following protocol stacks: the protocol stack of the service control plane includes a radio resource control (RRC) protocol layer and a packet data convergence protocol (PDCP) layer, and the protocol stack of the service user plane includes a service data adaptation protocol (SDAP: Service Data Adaptation Protocol) layer and a PDCP layer; the distributed unit includes the following protocol stacks: the protocol stacks of the service control plane and the user plane include a radio link control (RLC) protocol layer, a medium access control (MAC) protocol layer, and a physical layer (PHY). Furthermore, the centralized unit of the anchor node may be an independent entity or an entity including multiple entities, such as a control plane entity (CU-CP: CU-Control Plane) and one or more user plane entities (CU-UP: CU-User Plane), and the interface between CU-CP and CU-UP is the E1 interface, see 3GPP TS38.463. The relay node includes a mobile terminal part and a distribution unit part, wherein the mobile terminal part is used to communicate with the upper level node of the relay node (such as mobile terminal 1 is used to communicate with the anchor node or the distribution unit of the anchor node, and mobile terminal 2 is used to communicate with the distribution unit of relay node 1), and the distribution unit part is used to communicate with the lower level node of the relay node (such as distribution unit 1 is used to communicate with mobile terminal 2, and can also be used to communicate with users M1~My, and distribution unit 2 is used to communicate with users N1~Nx). The protocol stack used by the distributed unit part in the relay node when serving the next-level node can be a complete protocol stack, such as the RRC / PDCP / RLC / MAC / PHY used by the service control plane, and the SDAP / PDCP / RLC / MAC / PHY layer used by the service user plane; it can also be a protocol stack including some protocol layers, such as a protocol stack including RLC / MAC / PHY, or a protocol stack including part of RLC, MAC and PHY.The protocol stack used by the mobile terminal part in the relay node when communicating with the upper node of the relay node can be a complete protocol stack, such as: RRC / PDCP / RLC / MAC / PHY used by the service control plane, SDAP / PDCP / RLC / MAC / PHY used by the service user plane; it can also be a protocol stack including some protocol layers, such as a protocol stack including RLC / MAC / PHY, or a protocol stack including some RLC, MAC and PHY. In the entire multi-hop network, the link between the distribution unit 1 and the mobile terminal 2 will be used to send the data of users N1~Nx, and the link between the distribution unit of the anchor node and the mobile terminal 1 will be used to send the data of users M1~My and users N1~Nx. Such links have a common feature, that is, the user served by the link accesses the network through another distribution unit (rather than the distribution unit at one end of the link). For example, the user served by the link between the distribution unit and the mobile terminal 1 accesses the network through the distribution unit 1 and the distribution unit 2, and the link between the distribution unit 1 and the mobile terminal 2 is used to serve the user who accesses the network through the distribution unit 2. In the present invention, such a link is called a backhaul link.

[0003] In the LTE / NR network, user data is sent through a radio bearer (RB), which can be a data radio bearer (DRB) or a signaling radio bearer (SRB). In the following description of the present invention, the data radio bearer (DRB) is used as an example. The data of each user will be sent through one or more DRBs, and each DRB has corresponding QoS parameters. The IAB network will also follow this approach, but unlike the single-hop network, the user's DRB will be transmitted on the backhaul link. In order to realize the transmission of different DRBs for the same user or different DRBs for different users on the backhaul link, the concept of a backhaul link channel is also defined accordingly. An example of a backhaul link channel is the backhaul link radio link control protocol layer (RLC: Radio Link Control) channel, that is, the Backhaul RLC channel. The entities serving both ends of this channel are served by the RLC / MAC (Media Access Control) / PHY (Physical Layer) layer. This backhaul link channel also has corresponding QoS parameters. One or more backhaul link channels will be established on the backhaul link to serve the user's DRB.

[0004] In the IAB network, once the backhaul link channel is defined, there are two possible mappings:

[0005] ■ Mapping between user DRBs and backhaul link channels, the mapping includes mapping multiple different user DRBs to the same or different backhaul link channels, and also includes mapping a data packet from a backhaul link channel to one or more different user DRBs. An example, such as Figure 2 As shown in (a), Figure 1 The distribution unit in the anchor node needs to complete the mapping between user bearers 1~m and return link channels 1~n. Specifically, if the user's data packet is sent from the left side of the distribution unit to the right side via the distribution unit (such as downlink data packets), the distribution unit needs to send data packets from different user wireless bearers to different return link channels, such as data packets from user wireless bearer 1 need to be sent to return link channel 2; if the user's data packet is sent from the right side of the distribution unit to the left side via the distribution unit (such as uplink data packets), the distribution unit needs to map data packets from different return link channels to different user wireless bearers, such as data packets from return link 1 need to be mapped to user wireless bearer m. Another example, Figure 2 (b) Figure 1 Relay node 2 needs to complete the mapping between return link channels 1~n and user bearers 1~m. Specifically, if the user's data packet is sent from the left side of relay node 2 to the right side via relay node 2 (such as downlink data packet), relay node 2 needs to map the channels from different return links to different user wireless bearers, such as mapping the data packet from the return link channel 2 to the user wireless bearer 1; if the user's data packet is sent from the right side of relay node 2 to the left side via relay node 2 (such as uplink data packet), relay node 2 needs to map the data packets from different user wireless bearers to different return link channels, such as mapping the data packet from user wireless bearer m to the return link 1.

[0006] ■ Mapping between backhaul link channels, the mapping includes mapping a data packet on a backhaul link channel to one or more different backhaul link channels, and also includes mapping data packets on multiple different backhaul link channels to one backhaul link channel. An example, such as Figure 2 (c) Figure 1Relay node 1 needs to complete the mapping between return link channels 1~x and return link channels 1~y. Specifically, if the user's data packet is sent from the left side of relay node 1 to the right side via relay node 1 (such as downlink data packet), relay node 1 needs to map the data from different return link channels on the left side to different return link channels on the right side, such as mapping the data packet from the left return link channel 1 to the right return link channel 2; if the user's data packet is sent from the right side of relay node 1 to the left side via relay node 1 (such as uplink data packet), relay node 1 needs to map the data packets from different return link channels on the right side to different return link channels on the left side, such as mapping the data packet from the right return link channel 2 to the left return link channel x.

[0007] In the above and subsequent descriptions of the present invention, a user's DRB may be different DRBs for one user, or may be different DRBs for different users.

[0008] The above-mentioned "mapping between user's DRB and return link channel" and "mapping between return link channel and return link channel" can be determined by the anchor node or the centralized unit of the anchor node (centralized mapping method), or by the node serving these user DRBs and return link channels (distributed mapping method). In the centralized mapping method, the anchor node or the centralized unit of the anchor node will send the mapping relationship it determines to the corresponding node, and then the node will execute according to the received mapping relationship, such as Figure 2 In (a), the distribution unit performs the mapping relationship. Figure 2 In (b), the mapping relationship is performed by relay node 2. Figure 2 In (c), the mapping relationship is performed by relay node 1. In the distributed mapping method, the anchor node or the centralized unit of the anchor node needs to provide some auxiliary information to the node that determines the mapping relationship, so that the node that determines the mapping relationship can decide the mapping relationship. Figure 2 The node that determines the mapping relationship in (a) is the distribution unit. Figure 2 The node that determines the mapping relationship in (b) is relay node 2. Figure 2 The node that determines the mapping relationship in (c) is the relay node 1. For the distributed method, there is no mechanism in the existing mechanism for the anchor node or the centralized unit of the anchor node to provide auxiliary information for determining the mapping relationship to the node that determines the mapping relationship. The present invention provides a method for configuring a node, which is used to help the node determine the mapping relationship between the user's DRB and the backhaul link channel, and / or the mapping relationship between the backhaul link channel and the backhaul link channel. Summary of the invention

[0009] The present invention provides a method and device for configuring a node to send and receive data, which enables the node to determine a channel or wireless bearer used to send received data and execute the sending of the received data.

[0010] The present invention provides a method for configuring a node, the method comprising:

[0011] The second node receives a first message sent by the first node, where the first message includes information for determining a channel used by the second node to send data received by the second node, and / or information for determining a radio bearer used by the second node to send data received by the second node;

[0012] The received data is mapped to the channel and / or radio bearer used to send the data for transmission.

[0013] Preferably, the second node includes a distribution unit and a mobile terminal.

[0014] Preferably, the information used to determine the channel used by the second node to send the data received by the second node includes: information related to the QoS of the backhaul link channel served by the distribution unit of the second node; information related to the QoS of the backhaul link channel served by the mobile terminal of the second node;

[0015] The information used to determine the wireless bearer used by the second node to send data received by the second node includes: information related to the QoS of the user wireless bearer served on the return link channel served by the distribution unit of the second node; information related to the QoS of the return link channel served by the mobile terminal of the second node.

[0016] Preferably, the second node comprises a distribution unit,

[0017] The information used to determine the channel used by the second node to send the data received by the second node includes: information related to the QoS of the backhaul link channel served by the second node; information related to the QoS of the user radio bearer; or,

[0018] The information used to determine the channel used by the second node to send data received by the second node includes: information related to the QoS of the user wireless bearer; the method also includes: sending a response message to the first node, the response message including: information related to the QoS of the return link channel served by the second node.

[0019] Preferably, the information used to determine the channel used by the second node to send the data received by the second node, and / or the information used to determine the radio bearer used to send the data received by the second node, includes one or more of the following information:

[0020] identification information of the first node;

[0021] identification information of the second node;

[0022] identification information of the user to whom the first message is directed;

[0023] information related to the configuration of the first node;

[0024] information related to a backhaul link channel served by a distribution unit of the second node;

[0025] Information related to user radio bearers served on a backhaul link channel served by a distribution unit of the second node;

[0026] information related to a backhaul link channel served by a mobile terminal of the second node;

[0027] information related to a user radio bearer on a backhaul link served by a mobile terminal of the second node;

[0028] information related to a mobile terminal configuring the second node;

[0029] Indication information related to feedback information that the second node needs to provide.

[0030] Preferably, the method further includes: the second node sending a response message to the first message to the first node, wherein the response message includes one or more of the following information:

[0031] identification information of the first node;

[0032] identification information of the second node;

[0033] identification information of the user to whom the response message is directed;

[0034] information related to the configuration of the second node;

[0035] information related to the user radio bearer accommodated by the second node;

[0036] information related to backhaul link channels served by the distribution unit of the second node that can be accommodated or cannot be accommodated by the distribution unit of the second node;

[0037] Information related to a backhaul link channel served by a mobile terminal of the second node that can be accommodated or cannot be accommodated by a mobile terminal of the second node;

[0038] A message related to configuring the mobile terminal of the second node.

[0039] Preferably, the backhaul link channel served by the distribution unit of the second node serves one or more user radio bearers; and / or,

[0040] The backhaul link channel served by the mobile terminal of the second node serves one or more user radio bearers.

[0041] The present invention provides a method for configuring a node, the method comprising:

[0042] A first node sends a first message to a second node, where the first message includes information for determining a channel used by the second node to send data received by the second node, and / or information for determining a radio bearer used by the second node to send data received by the second node;

[0043] The first node receives a response message to the first message sent by the second node.

[0044] Preferably, the information used to determine the channel used by the second node to send the data received by the second node, and / or the information used to determine the radio bearer used by the second node to send the data received by the second node, further includes one or more of the following information:

[0045] identification information of the first node;

[0046] identification information of the second node;

[0047] identification information of the user to whom the first message is directed;

[0048] information related to the configuration of the first node;

[0049] information related to a backhaul link channel served by a distribution unit of the second node;

[0050] Information related to user radio bearers served on a backhaul link channel served by a distribution unit of the second node;

[0051] information related to a backhaul link channel served by a mobile terminal of the second node;

[0052] information related to a user radio bearer on a backhaul link served by a mobile terminal of the second node;

[0053] information related to a mobile terminal configuring the second node;

[0054] Indication information related to feedback information that the second node needs to provide.

[0055] The present invention provides a node device, comprising:

[0056] processor;

[0057] A memory stores instructions, which, when executed by the processor, enable the processor to execute the method executed by the node device.

[0058] By adopting the method and device of the present invention, a method for nodes in a multi-hop network to determine the method for sending received data is realized, thereby ensuring the service quality requirements of user data. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The above features and advantages of the present invention will become more apparent through the following detailed description of the invention in conjunction with the accompanying drawings, in which:

[0060] Figure 1 An example of a multi-hop network is shown;

[0061] Figure 2 The mapping between user radio bearers and backhaul link channels and the mapping between backhaul link channels are shown;

[0062] Figure 3 A flow chart showing a method in which a first node configures a second node;

[0063] Figure 4 A flow chart showing a method for a second node to receive configuration information of a first node;

[0064] Figure 5 A flow chart of configuration between a first node and a second node is shown;

[0065] Figure 6 A flowchart of interface configuration initiated by a first node is shown;

[0066] Figure 7 A flowchart of interface configuration initiated by the second node is shown;

[0067] Figure 8 A flow chart showing configuration of users in a multi-hop network is shown;

[0068] Fig. 9 A block diagram illustrating an example hardware arrangement of an example device of an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0069] Below, the preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. In the accompanying drawings, although shown in different drawings, the same reference numerals are used to represent the same or similar components. For clarity and conciseness, the detailed description of the known functions and structures contained herein will be omitted to avoid making the subject of the present invention unclear.

[0070] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0071] In the following description, an anchor node may be a base station, which may be a complete base station or a base station composed of a centralized unit and a distributed unit. A relay node is a node including a distributed unit and a mobile terminal. A first node (device) may be an anchor node or a centralized unit of an anchor node, and a second node (device) may be a distributed unit of an anchor node or a relay node. Of course, other naming methods are also possible and within the scope of the present invention.

[0072] Figure 3 A flow chart of a method for configuring a distribution unit or a relay node of an anchor node according to an embodiment of the present invention is shown. The method may be performed at a first node (anchor node or a centralized unit of an anchor node).

[0073] like Figure 3 As shown, the method includes operation S310, a first node sends a message to a second node including information related to determining that the second node sends data received by the second node.

[0074] In some examples, the message sent to the second node includes one or more of the following information:

[0075] identification information of the first node;

[0076] identification information of the second node;

[0077] Identification information of the user to whom the message is directed;

[0078] information related to the configuration of the first node, such as information related to the centralized unit configuration of the first node;

[0079] information related to a backhaul link channel served by a distribution unit of the second node;

[0080] Information related to user radio bearers served on a backhaul link channel served by a distributed unit of the second node;

[0081] information related to a backhaul link channel served by a mobile terminal of the second node;

[0082] information related to user radio bearers on a backhaul link served by a distribution unit of the second node;

[0083] Information related to the mobile terminal configuring the second node.

[0084] Figure 3 The illustrated method may also include receiving a response to the message from the second node, wherein the response includes one or more of the following information:

[0085] identification information of the first node;

[0086] identification information of the second node;

[0087] Identification information of the user to whom the message is directed;

[0088] Information related to the configuration of the second node, such as information related to the configuration of the distribution unit of the second node;

[0089] information related to the user radio bearer accommodated by the second node;

[0090] information related to backhaul link channels served by the distribution unit of the second node that can or cannot be accommodated by the distribution unit of the second node;

[0091] Information about a backhaul link channel served by a mobile terminal of the second node that can be accommodated or cannot be accommodated by a mobile terminal of the second node;

[0092] A message related to configuring the mobile terminal of the second node.

[0093] Figure 4 The flowchart of the method for configuring the distribution unit of the anchor node or the relay node according to the embodiment of the present invention is shown. The method can be executed at the second node (the distribution unit of the anchor node or the relay node).

[0094] like Figure 4 As shown, the method includes operation S410, where a second node receives a message sent by a first node, including information related to data for determining that the second node sends data received by the second node.

[0095] In some examples, the method may also include sending a response to the message, the response including one or more of the following information:

[0096] identification information of the first node;

[0097] identification information of the second node;

[0098] Identification information of the user to whom the message is directed;

[0099] Information related to the configuration of the second node, such as information related to the configuration of the distribution unit of the second node;

[0100] information related to the user radio bearer accommodated by the second node;

[0101] information related to backhaul link channels served by the distribution unit of the second node that can or cannot be accommodated by the distribution unit of the second node;

[0102] Information about a backhaul link channel served by a mobile terminal of the second node that can be accommodated or cannot be accommodated by a mobile terminal of the second node;

[0103] A message related to configuring the mobile terminal of the second node.

[0104] The radio bearer (RB) of the user described in the embodiment of the present invention can be a data radio bearer DRB (data radio bearer) or a signaling radio bearer SRB (signaling radio bearer), which represents data for a user. However, the following description is based on DRB as an example, but the method of the present invention can still be applied to SRB.

[0105] The user DRB in the embodiment of the present invention may be one or more different DRBs belonging to one user, or may be one or more different DRBs belonging to different users.

[0106] Each user DRB or each backhaul link channel in the present invention has corresponding QoS-related information, and the QoS-related information defines at least one of the following QoS parameters:

[0107] ■QoS Priority level;

[0108] ■Packet Delay Budget;

[0109] ■Packet Error Rate;

[0110] ■5QI value (5G QoS Identifier);

[0111] ■Delay Critical indication;

[0112] ■Averaging Window;

[0113] ■Maximum data burst volume;

[0114] ■Allocation and Retention Priority;

[0115] ■GBR QoS flow information, such as Maximum Flow Bit Rate Uplink / Downlink, Guaranteed Flow Bit Rate Uplink / Downlink, Maximum Packet Loss Rate Uplink / Downlink;

[0116] ■Reflective QoS Attribute.

[0117] If the DRB or backhaul link channel also includes multiple QoS flows, the QoS parameter information for each QoS flow will also be included. The QoS parameter information for the QoS flow also includes at least one of the above QoS information for the DRB or backhaul link channel.

[0118] The above-mentioned definitions of QoS parameters can be found in 3GPP TS38.473 and 3GPP TS23.501. The QoS-related information in the present invention refers to the above-mentioned information related to QoS parameters.

[0119] In the present invention, the signaling messages exchanged between two nodes may be exchanged through a wired link directly connected between the two nodes, or a wireless link between the two nodes; or they may be exchanged after being forwarded by one or more nodes between the two nodes, and the link used when forwarded by one or more nodes may be a wired link or a wireless link. In one embodiment, the wired link may be a wired link serving the F1 interface; in another embodiment, the wireless link may be an air interface link of NR.

[0120] Figure 5 FIG. 4 shows a signaling flow chart of information related to configuration and determination of mapping relationship between nodes according to an embodiment of the present invention. Figure 5 shown.

[0121] Step S501: The first node sends a configuration message 1 to the second node, where the message 1 includes at least one of the following information:

[0122] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0123] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0124] ■ identification information of the user to which the message is directed, where the user may be a user served by the distribution unit of the second node, or a mobile terminal of another relay node served by the distribution unit of the second node;

[0125] ■ Information related to the configuration of the first node, which includes at least one of the following information:

[0126] ■The content of the system information determined by the first node;

[0127] ■ Information about the RRC versions supported by the first node;

[0128] ■Information of cells determined by the first node that need to be activated by the second node;

[0129] ■Information of cells determined by the first node that need to be deactivated by the second node;

[0130] ■Address information of the added / removed / updated TNL associations determined by the first node;

[0131] ■Information of the disabled cell determined by the first node;

[0132] ■ Information related to LTE and NR resource coordination requests;

[0133] ■ Information about the LTE resources that need to be protected;

[0134] ■Instructions for sending system messages.

[0135] The above information is only an example. The information related to the configuration of the first node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the centralized unit to the distributed unit in 3GPP TS38.473 (such as F1 SETUP RESPONSE message, GNB-DUCONFIGURATION UPDATE ACKNOWLEDGE message, GNB-CU CONFIGURATION UPDATE message, GNB-DURESOURCE COORDINATION REQUEST message, SYSTEM INFORMATION DELIVERY COMMAND message).

[0136] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0137] ■ identification information of the distribution unit of the second node;

[0138] ■ Information related to the backhaul link channel served by the distribution unit of the second node, the backhaul link channel may be a newly created backhaul link channel or an established backhaul link channel that needs to be modified, the information including at least one of the following information:

[0139] ◆Identification information of the return link channel;

[0140] ◆ Information related to the QoS of the backhaul link channel, see the above “Each user DRB or each backhaul link channel has corresponding QoS related information”;

[0141] ◆Information of the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the distribution unit of the second node and the backhaul link channel served by the mobile terminal of the second node;

[0142] ■ Information related to the user DRB served on the backhaul link channel served by the distribution unit of the second node. The user DRB may be newly created or may have been established but needs to be modified. For a user DRB, the information includes at least one of the following information:

[0143] ◆User DRB identifier, such as DRB identifier, UE identifier, UE identifier + DRB identifier, can be used to identify the identification information of different DRBs of different users.

[0144] ◆The address information of the target receiving node corresponding to the user DRB. In one embodiment, the target receiving node may be a relay node accessed by the user. In another embodiment, the target receiving node may be a distribution unit or a centralized unit or an anchor node of an anchor node serving the user. The address information is used to identify the node receiving the data of the user DRB, which may be a gNB-DU ID, C-RNTI, IAB node ID, gNB-CU ID, IAB donor ID, gNB ID, Cellidentity, or newly defined identification information. Furthermore, the information may be configured for a user DRB or for a user.

[0145] ◆The address information of the source node corresponding to the user DRB. In one embodiment, the source sending node may be a relay node accessed by the user. In another embodiment, the source sending node may be a distribution unit or a centralized unit or an anchor node of an anchor node serving the user. The address information is used to identify the node receiving the data of the user DRB, which may be a gNB-DU ID, C-RNTI, IAB node ID, gNB-CU ID, IAB donor ID, gNB ID, Cell identity, or newly defined identification information. Furthermore, the information may be configured for a user DRB or for a user.

[0146] ◆Path identification information related to the transmission of the user DRB data packet, the identification information indicates the nodes that the user DRB data packet needs to pass through for transmission. If there are two paths to send the user DRB data packet, path 1 is: the centralized unit of the anchor node → the distribution unit of the anchor node → relay node 1 → relay node 2 (the user accesses the relay node), and path 2 is: the centralized unit of the anchor node → the distribution unit of the anchor node → relay node 3 → relay node 2 (the user accesses the relay node), then when the path identification information is 1, it means that the transmission path of the user DRB data packet is path 1, and when the path identification information is 2, it means that the transmission path of the user DRB data packet is path 2. The path represented by each identification information can be pre-configured or configured in this step. If it is configured in this step, it can further include the identification information of each node on the path represented by the path identification information, as well as the order of the nodes on the path. For example, when configuring path 1, the identification information of the nodes (i.e., the distribution unit of the anchor node, relay node 1, relay node 2) that the path passes through in sequence can be configured. Furthermore, the information may be configured for a user DRB or for a user.

[0147] ◆For information related to the QoS of user DRB, see the above “Each user DRB or each channel of the backhaul link has corresponding QoS related information”.

[0148] ◆Information of the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, and the information includes at least one of the following information:

[0149] ●Identification information of the backhaul link channel;

[0150] ●For the QoS related information of the return link channel, see the above “each user DRB or each return link channel has corresponding QoS related information”.

[0151] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0152] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0153] ■ Information about the backhaul link channel served by the mobile terminal of the second node. Figure 1 As shown in , if the second node is relay node 1, the backhaul link channel served by the mobile terminal of the second node is the backhaul link channel between the distribution unit of the anchor node and the mobile terminal 1 of relay node 1; if the second node is relay node 2, the backhaul link channel served by the mobile terminal of the second node is the backhaul link channel between the distribution unit 1 of relay node 1 and the mobile terminal 2 of relay node 2. For one of the backhaul link channels, the information includes at least one of the following information:

[0154] ◆Identification information of the return link channel;

[0155] ◆ Information related to the QoS of the return link channel. For information related to the QoS, please refer to “Each user DRB or each return link channel has corresponding QoS related information”. This information is determined by the first node itself, or obtained by the first node from other nodes. For information obtained by the first node from other nodes, one embodiment is as follows: Figure 1 As shown, the QoS information of the backhaul link channel served by the mobile terminal 1 of the relay node 1 (the second node) is obtained by the centralized unit (the first node) of the anchor node from the distributed unit of the anchor node; in another embodiment, as Figure 1 As shown, the QoS information of the backhaul link channel served by the mobile terminal 2 of the relay node 2 (the second node) is obtained by the centralized unit of the anchor node (the first node) from the relay node 1 (or the distributed unit 1 of the relay node 1);

[0156] ◆ Information about the maximum QoS that can be accommodated by the backhaul link channel. For information about the QoS, please refer to "Each user DRB or each backhaul link channel has corresponding QoS information". This information is determined by the first node itself, or obtained by the first node from other nodes. For information obtained by the first node from other nodes, an embodiment is as follows: Figure 1 As shown, the QoS information of the backhaul link channel served by the mobile terminal 1 of the relay node 1 (the second node) is obtained by the centralized unit (the first node) of the anchor node from the distributed unit of the anchor node; in another embodiment, as Figure 1 As shown, the QoS information of the backhaul link channel served by the mobile terminal 2 of the relay node 2 (the second node) is obtained by the centralized unit of the anchor node (the first node) from the relay node 1 (or the distributed unit 1 of the relay node 1);

[0157] ◆Information of the backhaul link channel served by the distribution unit of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0158] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0159] ● User DRB identifier, such as DRB identifier, UE identifier, UE identifier + DRB identifier, which can be used to identify the identification information of different DRBs of different users;

[0160] ● Information related to the QoS of the user DRB, see the above “Each user DRB or each backhaul link channel has corresponding QoS related information”;

[0161] ■A message for configuring the mobile terminal of the second node, which may be an RRC message, such as an RRCReconfiguration message (see 3GPP TS38.331) or an RRCConnectionReconfiguration message (see 3GPP TS36.331), etc. The content of the configuration message may be generated entirely by the first node, or may be generated partially by the first node and partially by other nodes serving the mobile terminal (such as a distributed unit in other nodes or a distributed unit in an anchor node).

[0162] ■Indication information related to feedback information that the second node needs to provide, the indication information indicating the information that the second node needs to feed back to the first node, the indication information includes at least one of the following information:

[0163] ■Indication information indicating whether information related to the backhaul link channel served by the distribution unit of the second node (such as information related to the QoS of the backhaul link channel) can / needs to be provided. The indication information can be for one backhaul link channel or for multiple backhaul link channels. Optionally, the indication information includes information about the targeted backhaul link channel (such as identification information of the backhaul link channel). If the indication information indicates "cannot / needs to be provided", the second node does not need to provide it. If the indication information indicates "can / needs to be provided", the second node can provide it. In one embodiment, if the first node provides information related to the return link channel, and the indication information indicates "can / need to be provided", the second node can provide updated information related to the return link channel; in one embodiment, if the first node provides information related to the return link channel, and the indication information indicates "can / need to be provided", the second node can provide the updated information when it is necessary to update the information related to the return link channel; in one embodiment, if the first node provides information related to the return link channel, and the indication information indicates "can / need to be provided", the second node can provide the first node with information related to the QoS of the return link channel that can be accepted by the second node when the QoS related information provided by the first node cannot be met. Furthermore, for one or more return link channels, the indication information can also include information related to the minimum QoS of the return link channel that needs to be met by the second node. In one embodiment, this information can be used as a reference for the second node to generate QoS related information of the return link channel.

[0164] ■Indication information indicating whether the mapping relationship between the backhaul link served by the distribution unit of the second node and the UE DRB can be / needs to be provided. The indication information can be for one backhaul link channel or for multiple backhaul link channels. Optionally, the indication information will include information about one or more backhaul link channels (such as identification information of the backhaul link channels). If the indication information indicates "cannot / needs to be provided", the second node does not need to provide it; if the indication information indicates "can / needs to be provided", the second node can provide it. In one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / needs to be provided", the second node can provide the updated mapping relationship; in one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / needs to be provided", the second node can provide the updated information when the mapping relationship needs to be updated; in one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / needs to be provided", the second node can provide the first node with a mapping relationship that can be accepted by the second node when the mapping relationship provided by the first node cannot be satisfied.

[0165] ■Indication information indicating whether a mapping relationship between a backhaul link served by a distribution unit of the second node and a backhaul link served by a mobile terminal of the second node can be / needed to be provided. The indication information may be for one or more backhaul link channels served by the distribution unit, or for one or more backhaul link channels served by the mobile terminal. Optionally, the indication information may include information about the one or more backhaul link channels (such as identification information of the backhaul link channels). If the indication information indicates "cannot / need to be provided", the second node does not need to provide it; if the indication information indicates "can / need to be provided", the second node may provide it. In one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / need to be provided", the second node may provide the updated mapping relationship; in one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / need to be provided", the second node may provide the updated information when the mapping relationship needs to be updated; in one embodiment, if the first node provides the mapping relationship and the indication information indicates "can / need to be provided", the second node may provide the first node with a mapping relationship that can be accepted by the second node when the mapping relationship provided by the first node cannot be satisfied.

[0166] Step S502: The second node sends a response message 2 to the first node, where the message 2 includes at least one of the following information:

[0167] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0168] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0169] ■ identification information of the user to which the message is directed, where the user may be a user served by the distribution unit of the second node, or a mobile terminal of another relay node served by the distribution unit of the second node;

[0170] ■ Information related to the configuration of the second node, the information including at least one of the following information;

[0171] ■ Information about the cells served by the distribution unit of the second node;

[0172] ■ information related to the system information determined by the distribution unit of the second node;

[0173] ■ RRC version information of the distribution unit of the second node;

[0174] ■ Status information of the cell served by the second node, such as activated, inactivated, shutting down, etc.;

[0175] ■Information of cells deleted by the distribution unit of the second node;

[0176] ■Information of the cell modified by the distribution unit of the second node;

[0177] ■Information of cells added by the distribution unit of the second node;

[0178] ■Information about the cells that the distribution unit of the second node cannot activate;

[0179] ■Address information of TNL associations added / unadded at the distribution unit of the second node;

[0180] ■ Information related to LTE and NR resource coordination response;

[0181] ■ Information about the load of the distribution unit of the second node;

[0182] The above information is only an example. The information related to the configuration of the second node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the distribution unit to the centralized unit in 3GPP TS38.473 (such as F1 SETUP REQUEST message, GNB-DUCONFIGURATION UPDATE message, GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message, GNB-DURESOURCE COORDINATION RESPONSE message, GNB-DU STATUS INDICATION message).

[0183] ■ Information about the user DRB accepted by the second node, such as the identifier of the user DRB;

[0184] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0185] ■ Information about the return link channels served by the distribution unit of the second node that can be accommodated or cannot be accommodated by the distribution unit of the second node, the information comprising at least one of the following information:

[0186] ◆ Information about the backhaul link channel accepted by the distribution unit of the second node, the backhaul link channel may be newly created or may be already established but modified, and the information includes at least one of the following information:

[0187] ● Identification information of the backhaul link channel;

[0188] ●The QoS-related information of the return link channel generated by the second node, which may be directly generated by the second node or suggested after referring to the QoS-related information sent by the first node for the return link channel; the QoS-related information may refer to “each user DRB or each return link channel has corresponding QoS-related information”; further, in one embodiment, the second node may decide whether to include the information based on the “indication information related to the feedback information that the second node needs to provide” sent by the first node.

[0189] ● Information about the maximum QoS that can be accommodated by the return link channel generated by the second node. This information is different from the above-mentioned "QoS-related information of the return link channel generated by the second node" in that after the first node obtains this information, it can determine the user DRB that can be additionally accommodated by the return link channel, while the above-mentioned "QoS-related information of the return link channel generated by the second node" indicates the QoS information that can be satisfied for the user DRB in the current network. For information about this QoS, please refer to "Each user DRB or each return link channel has corresponding QoS-related information";

[0190] ●Information on the return link channel served by the mobile terminal of the second node corresponding to the return link channel, such as the identifier of the return link channel, which reflects the mapping relationship between the return link channel served by the distribution unit of the second node and the return link channel served by the mobile terminal of the second node; further, in one embodiment, the second node may decide whether to include the information based on the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0191] ● Information related to the user DRB served by the backhaul link channel, such as identification information of the user DRB. Further, in one embodiment, the second node may decide whether to include the information based on the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0192] ◆ Information about the backhaul link channel that is not accepted by the distribution unit of the second node. The backhaul link channel may be newly created or may be established but modified. The information includes at least one of the following information:

[0193] ● Identification information of the backhaul link channel;

[0194] ● QoS-related information of the return link channel recommended by the second node. The QoS-related information can be found in “Each user DRB or each return link channel has corresponding QoS-related information”. Furthermore, in one embodiment, the second node can decide whether to include the information based on the “indication information related to the feedback information that the second node needs to provide” sent by the first node.

[0195] ■Configuration information of other nodes (such as users, mobile terminals of other relay nodes) served by the distribution unit of the second node, such as Cell group configuration, see 3GPP TS38.331; in one embodiment, it may also include configuration information of the return link channel served by the distribution unit of the second node (such as RLC layer configuration, MAC layer configuration, PHY layer configuration, etc.).

[0196] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0197] ■ Information about the backhaul link channel served by the mobile terminal of the second node that can be accommodated or cannot be accommodated by the mobile terminal of the second node, the information comprising at least one of the following information:

[0198] ◆ Information about the return link channel served by the mobile terminal of the second node and acceptable to the mobile terminal of the second node, the information including at least one of the following information:

[0199] ● Identification information of the backhaul link channel;

[0200] ● QoS related information of the return link channel generated by the second node, which can be directly generated by the second node or generated after referring to the QoS related information for the return link channel sent by the first node. The QoS related information can refer to “Each user DRB or each return link channel has corresponding QoS related information”;

[0201] ● Information about the backhaul link channel served by the distribution unit of the second node corresponding to the backhaul link channel, such as an identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0202] ●Information related to the user DRB served by the backhaul link channel, such as the user DRB identifier;

[0203] ◆ Information related to the backhaul link channel served by the mobile terminal of the second node which cannot be accommodated by the mobile terminal of the second node, the information comprising at least one of the following information:

[0204] ● Identification information of the backhaul link channel;

[0205] ● QoS related information of the backhaul link channel recommended by the second node. The QoS related information can be found in “Each user DRB or each backhaul link channel has corresponding QoS related information”;

[0206] ■A message related to configuring the mobile terminal of the second node, which may be an RRC message, such as an RRCReconfigurationComplete message (see 3GPP TS38.331) or an RRCConnectionReconfigurationComplete message (see 3GPP TS36.331), etc. This message may be a response message to the RRC message received in the configuration message 1, or it may be an RRC message generated by the mobile terminal of the second node (this message does not need to be sent after receiving the RRC message sent by the first node).

[0207] In the above process, the configuration message 1 can be the UE Context Setup / Modification Request message used on the existing F1 interface, or a newly defined message, such as a relay node context setup / modification request message, and the response message can be the UE Context Setup / Modification Response message used on the existing F1 interface, or a newly defined message, such as a relay node context setup / modification response message. The above message names are only examples, and other names may be used.

[0208] Through the above process, the configuration of the second node can be completed, so that the second node can determine and execute the mapping between the user DRB and the return link channel, or the mapping between the return link channel of the distribution unit service of the second node and the return link channel of the mobile terminal service of the second node, thereby realizing the flexible satisfaction of the user QoS requirements by the relay node in the multi-hop network, and allowing the relay node to change the strategy for satisfying the QoS requirements on the remaining paths according to the satisfaction of the QoS of the user data packet on the path that has been transmitted.

[0209] Embodiment 1 (Interface management between the first node and the second node initiated by the first node)

[0210] Above Figure 5 The process in can be used to perform interface management between the first node and the second node initiated by the first node, such as Figure 6 As shown, the above process is:

[0211] Step S601: The first node sends an interface configuration message 1 to the second node. The configuration message 1 includes some information related to the first point configuration. The message includes at least one of the following information:

[0212] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0213] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0214] ■ Information related to the configuration of the first node, which includes at least one of the following information:

[0215] ■The content of the system information determined by the first node;

[0216] ■ Information about the RRC versions supported by the first node;

[0217] ■Information of cells determined by the first node that need to be activated by the second node;

[0218] ■Information of cells determined by the first node that need to be deactivated by the second node;

[0219] ■Address information of the added / removed / updated TNL associations determined by the first node;

[0220] ■Information of the disabled cell determined by the first node;

[0221] ■ Information related to LTE and NR resource coordination requests;

[0222] ■ Information about the LTE resources that need to be protected;

[0223] ■Instructions for sending system messages.

[0224] The above information is only an example. The information related to the configuration of the first node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the centralized unit to the distributed unit in 3GPP TS38.473 (such as F1 SETUP RESPONSE message, GNB-DUCONFIGURATION UPDATE ACKNOWLEDGE message, GNB-CU CONFIGURATION UPDATE message, GNB-DURESOURCE COORDINATION REQUEST message, SYSTEM INFORMATION DELIVERY COMMAND message).

[0225] Step S602: The second node sends an interface configuration response message 2 to the first node. The response message includes information related to the configuration of the distribution unit of the second node. The message includes at least one of the following information:

[0226] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0227] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0228] ■ Information related to the configuration of the second node, the information including at least one of the following information;

[0229] ■ Information about the cells served by the distribution unit of the second node;

[0230] ■ information related to the system information determined by the distribution unit of the second node;

[0231] ■ RRC version information of the distribution unit of the second node;

[0232] ■ Status information of the cell served by the second node, such as activated, inactivated, shutting down, etc.;

[0233] ■Information of cells deleted by the distribution unit of the second node;

[0234] ■Information of the cell modified by the distribution unit of the second node;

[0235] ■Information of cells added by the distribution unit of the second node;

[0236] ■Information about the cells that the distribution unit of the second node cannot activate;

[0237] ■Address information of TNL associations added / unadded at the distribution unit of the second node;

[0238] ■ Information related to LTE and NR resource coordination response;

[0239] ■ Information about the load of the distribution unit of the second node.

[0240] The above information is only an example. The information related to the configuration of the second node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the distribution unit to the centralized unit in 3GPP TS38.473 (such as F1 SETUP REQUEST message, GNB-DUCONFIGURATION UPDATE message, GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message, GNB-DURESOURCE COORDINATION RESPONSE message, GNB-DU STATUS INDICATION message).

[0241] Embodiment 2 (Interface management between the first node and the second node initiated by the second node)

[0242] In order to manage the interface between the first node and the second node, the second node may also initiate a process related to interface management, such as Figure 7 As shown, the process is:

[0243] Step S701: The second node sends an interface configuration request message 1 to the first node. The configuration request message includes information related to the configuration of the distribution unit of the second node. The message includes at least one of the following information:

[0244] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0245] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0246] ■ Information related to the configuration of the second node, the information including at least one of the following information;

[0247] ■ Information about the cells served by the distribution unit of the second node;

[0248] ■ information related to the system information determined by the distribution unit of the second node;

[0249] ■ RRC version information of the distribution unit of the second node;

[0250] ■ Status information of the cell served by the second node, such as activated, inactivated, shutting down, etc.;

[0251] ■Information of cells deleted by the distribution unit of the second node;

[0252] ■Information of the cell modified by the distribution unit of the second node;

[0253] ■Information of cells added by the distribution unit of the second node;

[0254] ■Information about the cells that the distribution unit of the second node cannot activate;

[0255] ■Address information of TNL associations added / unadded at the distribution unit of the second node;

[0256] ■ Information related to LTE and NR resource coordination response;

[0257] ■ Information about the load of the distribution unit of the second node.

[0258] The above information is only an example. The information related to the configuration of the second node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the distribution unit to the centralized unit in 3GPP TS38.473 (such as F1 SETUP REQUEST message, GNB-DUCONFIGURATION UPDATE message, GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message, GNB-DURESOURCE COORDINATION RESPONSE message, GNB-DU STATUS INDICATION message).

[0259] Step S702: The first node sends an interface configuration confirmation message 2 to the second node. The configuration response message 2 includes some information related to the configuration of the first node. The message includes at least one of the following information:

[0260] ■ Identification information of the first node, such as the identification of the base station, the name of the base station, the identification of the centralized unit, the name of the centralized unit, etc.;

[0261] ■ Identification information of the second node. If the second node is a distribution unit, the identification information may be an identification of the distribution unit and a name of the distribution unit. If the second node is a relay node, the identification information may be an identification of the relay node and a name of the relay node, an identification of the distribution unit in the relay node, and an identification of the mobile terminal in the relay node;

[0262] ■ Information related to the configuration of the first node, which includes at least one of the following information:

[0263] ■The content of the system information determined by the first node;

[0264] ■ Information about the RRC versions supported by the first node;

[0265] ■Information of cells determined by the first node that need to be activated by the second node;

[0266] ■Information of cells determined by the first node that need to be deactivated by the second node;

[0267] ■Address information of the added / removed / updated TNL associations determined by the first node;

[0268] ■Information of the disabled cell determined by the first node;

[0269] ■ Information related to LTE and NR resource coordination requests;

[0270] ■ Information about the LTE resources that need to be protected;

[0271] ■Instructions for sending system messages.

[0272] The above information is only an example. The information related to the configuration of the first node is used to complete the interface management between the first node and the second node. For specific content, please refer to the information contained in the user-independent interface management message sent by the centralized unit to the distributed unit in 3GPP TS38.473 (such as F1 SETUP RESPONSE message, GNB-DUCONFIGURATION UPDATE ACKNOWLEDGE message, GNB-CU CONFIGURATION UPDATE message, GNB-DURESOURCE COORDINATION REQUEST message, SYSTEM INFORMATION DELIVERY COMMAND message).

[0273] The specific implementation methods of the above steps S501 and S502 are introduced below for different second nodes. In the following introduction, in order to avoid repetition, the specific content of the information contained in each message can refer to the content of the information contained in the above steps S501 and S502. In addition, the following information that may be contained in the configuration message 1 and the response message 2: the identification information of the first node, the identification information of the second node, and the identification information of the user to which the message is directed will not be different due to different methods adopted, and therefore will be omitted in the introduction.

[0274] Example 3 (the second node is Figure 1 The configuration process between the first node and the second node when the distribution unit of the anchor node is

[0275] When the second node is Figure 1 When the distribution unit of the anchor node in the first node is the process between the first node and the second node, such as Figure 5 As shown, it can help the second node determine the mapping between the user DRB and the backhaul link channel served by the distribution unit of the second node. The method for implementing the process includes:

[0276] Method 1 (the second node is a distribution unit of an anchor node): the first node provides information about the user DRB to the second node, the second node determines information about the backhaul link channel serving the user DRB (the backhaul link is served by the distribution unit of the second node), and the second node determines the mapping between the user DRB and the backhaul link channel served by the distribution unit of the second node based on the above information:

[0277] The configuration message 1 in step S501 above includes at least one of the following information:

[0278] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0279] ■ identification information of the distribution unit of the second node;

[0280] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distributed unit of the second node, the information including at least one of the following information for a user DRB:

[0281] ◆User DRB ID;

[0282] ◆Information related to the QoS of the user’s DRB;

[0283] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0284] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0285] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0286] ■For indication information related to the feedback information that the second node needs to provide, please refer to the relevant description in the present invention.

[0287] The response message 2 in the above step S502 includes at least one of the following information:

[0288] ■ Information about the user DRB accepted by the second node, such as the identifier of the user DRB;

[0289] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0290] ■ Information about the return link channels served by the distribution unit of the second node that can be accommodated or cannot be accommodated by the distribution unit of the second node, the information comprising at least one of the following information:

[0291] ◆ Information related to the accepted return link channel, which includes at least one of the following information:

[0292] ● Identification information of the backhaul link channel;

[0293] ●QoS related information of the return link channel generated by the second node; further, in one embodiment, the second node can decide whether to include the information based on "indication information related to feedback information that the second node needs to provide" sent by the first node.

[0294] ● Information about the maximum QoS that can be accommodated by the backhaul link channel generated by the second node;

[0295] ● Information related to the user DRB served by the backhaul link channel, such as identification information of the user DRB. Further, in one embodiment, the second node may decide whether to include the information based on the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0296] ◆ Information about the return link channel not accepted by the distribution unit of the second node, the information includes at least one of the following information:

[0297] ● Identification information of the backhaul link channel;

[0298] ● Information related to the QoS of the backhaul link channel recommended by the second node. Further, in one embodiment, the second node may decide whether to include the information according to the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0299] ■Configuration information of other nodes (such as users, mobile terminals of other relay nodes) served by the distribution unit of the second node, such as Cell group configuration, see 3GPP TS38.331. In one embodiment, configuration information of the backhaul link channel served by the distribution unit of the second node may also be included (such as RLC layer configuration, MAC layer configuration, PHY layer configuration, etc.).

[0300] Method 2 (the second node is a distribution unit of an anchor node): the first node provides the second node with information about the user DRB and information about the backhaul link channel served by the distribution unit of the second node, and the second node determines the mapping between the user DRB and the backhaul link channel served by the distribution unit of the second node based on the above information:

[0301] The configuration message 1 of step S501 above includes at least one of the following information:

[0302] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0303] ■ identification information of the distribution unit of the second node;

[0304] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0305] ◆Identification information of the return link channel;

[0306] ◆Information related to the QoS of the backhaul link channel.

[0307] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0308] ◆User DRB ID;

[0309] ◆Information related to the QoS of the user’s DRB;

[0310] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0311] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0312] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0313] ■ For indication information related to the feedback information that the second node needs to provide, refer to the description of the above indication information in the present invention.

[0314] The information included in the response message 2 in the above step S502 refers to method 1 in embodiment 3. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to the feedback information to be provided by the second node" sent by the first node.

[0315] Method 3 (the second node is a distribution unit of an anchor node): the first node provides the second node with information related to the user DRB and a mapping relationship between the user DRB and the backhaul link channel served by the distribution unit of the second node, and the second node determines information related to the backhaul link channel served by the distribution unit of the second node based on the above information:

[0316] The configuration message 1 of step S501 above includes at least one of the following information:

[0317] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0318] ■ identification information of the distribution unit of the second node;

[0319] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0320] ◆Identification information of the return link channel;

[0321] ◆Information about the user DRB served by the backhaul link channel, such as the identification information of the user DRB;

[0322] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0323] ◆User DRB ID;

[0324] ◆Information related to the QoS of the user’s DRB;

[0325] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0326] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0327] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0328] ◆Information of the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, such as identification information of the backhaul link channel.

[0329] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0330] The information included in the response message 2 in the above step S502 refers to method 1 in embodiment 3. Further, in one embodiment, the second node may determine the included information according to the "indication information related to the feedback information required to be provided by the second node" sent by the first node.

[0331] Method 4 (the second node is a distribution unit of an anchor node): Figure 5 The process in can also be applied to a centralized mapping method, in which the first node determines the mapping of the user DRB to the backhaul link channel served by the distribution unit of the second node:

[0332] In the method, the configuration message 1 in the above step S501 includes at least one of the following information:

[0333] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0334] ■ identification information of the distribution unit of the second node;

[0335] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0336] ◆Identification information of the return link channel;

[0337] ◆Information related to the QoS of the backhaul link channel;

[0338] ◆Information related to the user DRB served by the return link channel, such as the identification information of the user DRB.

[0339] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0340] ◆User DRB ID;

[0341] ◆Information related to the QoS of the user’s DRB;

[0342] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0343] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0344] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0345] ◆Information of the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, such as identification information of the backhaul link channel.

[0346] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0347] The information included in the response message 2 in the above step S502 refers to method 1 in embodiment 3. Further, in one embodiment, the second node may determine the included information according to the "indication information related to the feedback information required to be provided by the second node" sent by the first node.

[0348] Example 4 (the second node is Figure 1 Configuration process between the first node and the second node when the relay node is 1 in

[0349] When the second node is Figure 1 When the relay node is 1, the process between the first node and the second node is as follows Figure 5 As shown, it can help the second node determine the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node. The method for implementing the process includes:

[0350] Method 1 (the second node is a relay node 1): the first node provides the second node with information related to the user DRB, the second node determines information related to the backhaul link channel serving the user DRB (the backhaul link is served by the distribution unit of the second node), the mapping relationship between the UE DRB and the backhaul link channel served by the distribution unit of the second node, and the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node:

[0351] The configuration message 1 in step S501 above includes at least one of the following information:

[0352] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0353] ■ identification information of the distribution unit of the second node;

[0354] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0355] ◆User DRB ID;

[0356] ◆Information related to the QoS of the user’s DRB;

[0357] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0358] ■Identification information of the mobile terminal of the second node;

[0359] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0360] ◆Identification information of the return link channel;

[0361] ◆Information related to the QoS of the backhaul link channel;

[0362] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0363] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0364] ●User DRB ID;

[0365] ●Information related to the QoS of the user’s DRB;

[0366] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0367] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0368] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0369] ■Configure the message of the mobile terminal of the second node;

[0370] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0371] The response message 2 in the above step S502 includes at least one of the following information:

[0372] ■Information about the user DRB accepted by the second node;

[0373] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0374] ■ Information about the return link channels served by the distribution unit of the second node that can be accommodated or cannot be accommodated by the distribution unit of the second node, the information comprising at least one of the following information:

[0375] ◆ Information about the newly created or existing backhaul link channel accepted, including at least one of the following information:

[0376] ● Identification information of the backhaul link channel;

[0377] ● QoS related information of the backhaul link channel generated by the second node; further, in one embodiment, the second node may determine the included information according to “indication information related to feedback information required to be provided by the second node” sent by the first node;

[0378] ● Information about the maximum QoS that can be accommodated by the backhaul link channel generated by the second node;

[0379] ● Information about the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as an identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the distribution unit of the second node and the backhaul link channel served by the mobile terminal of the second node; further, in one embodiment, the second node may determine the information included according to the “indication information related to the feedback information required to be provided by the second node” sent by the first node;

[0380] ● Information related to the user DRB served by the backhaul link channel, such as identification information of the user DRB. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to the feedback information required to be provided by the second node" sent by the first node;

[0381] ◆ Information about the newly built or existing return link channel that is not accepted, including at least one of the following information:

[0382] ● Identification information of the backhaul link channel;

[0383] ● Information related to the QoS of the backhaul link channel recommended by the second node. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0384] ■Configuration information of other nodes (such as users, mobile terminals of other relay nodes) served by the distribution unit of the second node, such as Cell group configuration, see 3GPP TS38.331; in one embodiment, it may also include configuration information of the return link channel served by the distribution unit of the second node (such as RLC layer configuration, MAC layer configuration, PHY layer configuration, etc.).

[0385] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0386] ■ Information about the backhaul link channel served by the mobile terminal of the second node that can be accommodated or cannot be accommodated by the mobile terminal of the second node, the information comprising at least one of the following information:

[0387] ◆ Information about the backhaul link channels that can be accommodated and served by the mobile terminal of the second node, the information includes at least one of the following information:

[0388] ● Identification information of the backhaul link channel;

[0389] ● QoS related information of the backhaul link channel generated by the second node;

[0390] ● Information about the backhaul link channel served by the distribution unit of the second node corresponding to the backhaul link channel, such as an identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0391] ●Information related to the user DRB served by the return link channel, such as the user DRB identifier.

[0392] ◆ Information about the return link channel served by the mobile terminal of the second node that cannot be accommodated, the information includes at least one of the following information:

[0393] ● Identification information of the backhaul link channel;

[0394] ● QoS-related information of the backhaul link channel suggested by the second node.

[0395] ■ Messages related to the mobile terminal configuring the second node.

[0396] Method 2 (the second node is relay node 1): the first node provides the second node with a mapping relationship between a user DRB and a backhaul link channel (the backhaul link is served by a distribution unit of the second node), and the second node determines the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node based on the above information, as well as information related to the backhaul link channel served by the distribution unit of the second node:

[0397] The configuration message 1 in step S501 above includes at least one of the following information:

[0398] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0399] ■ identification information of the distribution unit of the second node;

[0400] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0401] ◆User DRB ID;

[0402] ◆Information related to the QoS of the user’s DRB;

[0403] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0404] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0405] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0406] ■ Information about the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, and which at least includes identification information of the backhaul link channel; information related to a newly created or existing backhaul link channel served by the distribution unit of the second node; and information at least including one of the following information:

[0407] ◆Identification information of the return link channel;

[0408] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0409] ●User DRB ID;

[0410] ●Information related to the QoS of the user’s DRB;

[0411] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0412] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0413] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0414] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0415] ■Identification information of the mobile terminal of the second node;

[0416] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0417] ◆Identification information of the return link channel;

[0418] ◆Information related to the QoS of the backhaul link channel;

[0419] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0420] ◆Information related to the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and includes information related to the user DRB identifier and the QoS of the user DRB;

[0421] ■Configure the message of the mobile terminal of the second node.

[0422] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0423] The content of the response message in step S502 is referred to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0424] Method 3 (the second node is relay node 1): the first node provides the second node with information about the backhaul link channel serving the user DRB (the backhaul link is served by the distribution unit of the second node) and information about the user DRB, and the second node determines the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node based on the above information:

[0425] The configuration message 1 in step S501 above includes at least one of the following information:

[0426] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0427] ■ identification information of the distribution unit of the second node;

[0428] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0429] ◆Identification information of the return link channel;

[0430] ◆Information related to the QoS of the backhaul link channel;

[0431] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0432] ◆User DRB ID;

[0433] ◆Information related to the QoS of the user’s DRB;

[0434] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0435] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0436] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0437] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0438] ■Identification information of the mobile terminal of the second node;

[0439] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0440] ◆Identification information of the return link channel;

[0441] ◆Information related to the QoS of the backhaul link channel;

[0442] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0443] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0444] ●User DRB ID;

[0445] ●Information related to the QoS of the user’s DRB;

[0446] ■Configure the message of the mobile terminal of the second node.

[0447] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0448] The content of the response message in step S502 may refer to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0449] Method 4 (the second node is the relay node 1) In this method, the first node determines the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node, but the mapping between the user DRB and the backhaul link channel served by the distribution unit of the second node, and the information related to the backhaul link channel served by the distribution unit of the second node are determined by the second node:

[0450] The configuration message 1 in step S501 above includes at least one of the following information:

[0451] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0452] ■ identification information of the distribution unit of the second node;

[0453] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0454] ◆Identification information of the return link channel;

[0455] ◆Information of the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0456] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0457] ◆User DRB ID;

[0458] ◆Information related to the QoS of the user’s DRB;

[0459] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0460] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0461] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0462] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0463] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0464] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0465] ◆Identification information of the return link channel;

[0466] ◆Information related to the QoS of the backhaul link channel;

[0467] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0468] ◆Information of the backhaul link channel served by the distribution unit of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0469] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0470] ●User DRB ID;

[0471] ●Information related to the QoS of the user’s DRB;

[0472] ■Configure the message of the mobile terminal of the second node.

[0473] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0474] The content of the response message 2 in the above step S502 refers to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to the feedback information that the second node needs to provide" sent by the first node.

[0475] Method 5 (the second node is relay node 1) The first node provides the second node with a mapping relationship between a user DRB and a backhaul link channel served by a distribution unit of the second node, as well as information related to the backhaul link channel served by the distribution unit of the second node, and the second node determines a mapping between a backhaul link channel served by a mobile terminal of the second node and a backhaul link channel served by the distribution unit of the second node:

[0476] The configuration message 1 in step S501 above includes at least one of the following information:

[0477] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0478] ■ identification information of the distribution unit of the second node;

[0479] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0480] ◆Identification information of the return link channel;

[0481] ◆Information related to the QoS of the backhaul link channel;

[0482] ◆Information related to the UE DRB served by the backhaul link, such as the identification information of the UE DRB;

[0483] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0484] ◆User DRB ID;

[0485] ◆Information related to the QoS of the user’s DRB;

[0486] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0487] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0488] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0489] ◆Information of the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, and the information includes at least one of the following information:

[0490] ●Identification information of the backhaul link channel;

[0491] ●QoS related information of the backhaul link channel;

[0492] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0493] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0494] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0495] ◆Identification information of the return link channel;

[0496] ◆Information related to the QoS of the backhaul link channel;

[0497] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0498] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0499] ●User DRB ID;

[0500] ●Information related to the QoS of the user’s DRB;

[0501] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0502] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0503] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0504] ■Configure the message of the mobile terminal of the second node.

[0505] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0506] The content of the response message 2 in step S502 may refer to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0507] Method 6 (the second node is relay node 1) The first node provides the second node with a mapping relationship between a backhaul link channel served by a distribution unit of the second node and a backhaul link channel served by a mobile terminal of the second node, as well as a mapping relationship between a user DRB and a backhaul link channel served by a distribution unit of the second node. The second node determines information related to the backhaul link channel served by the distribution unit of the second node based on the above information:

[0508] The configuration message 1 in step S501 above includes at least one of the following information:

[0509] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0510] ■ identification information of the distribution unit of the second node;

[0511] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0512] ◆Identification information of the return link channel;

[0513] ◆Information of the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0514] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0515] ●User DRB ID;

[0516] ●Information related to the QoS of the user’s DRB;

[0517] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0518] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0519] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0520] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0521] ◆User DRB ID;

[0522] ◆Information related to the QoS of the user’s DRB;

[0523] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0524] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0525] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0526] ◆Information about the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, and which at least includes identification information of the backhaul link channel. ■Information related to the mobile terminal of the second node, which at least includes one of the following information:

[0527] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0528] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0529] ◆Identification information of the return link channel;

[0530] ◆Information related to the QoS of the backhaul link channel;

[0531] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0532] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0533] ●User DRB ID;

[0534] ●Information related to the QoS of the user’s DRB;

[0535] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0536] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0537] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0538] ■Configure the message of the mobile terminal of the second node.

[0539] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0540] The content of the response message 2 in step S502 may refer to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0541] Method 7 (the second node is a relay node 1): In this method, the first node determines the mapping between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node, as well as information related to the backhaul link channel served by the distribution unit of the second node, and the second node determines the mapping relationship between the UE DRB and the backhaul link channel served by the distribution unit of the second node based on the above information:

[0542] The configuration message 1 in step S501 above includes at least one of the following information:

[0543] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0544] ■ identification information of the distribution unit of the second node;

[0545] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0546] ◆Identification information of the return link channel;

[0547] ◆Information related to the QoS of the backhaul link channel;

[0548] ◆Information of the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0549] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0550] ◆User DRB ID;

[0551] ◆Information related to the QoS of the user’s DRB;

[0552] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0553] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0554] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0555] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0556] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0557] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0558] ◆Identification information of the return link channel;

[0559] ◆Information related to the QoS of the backhaul link channel;

[0560] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0561] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0562] ●User DRB ID;

[0563] ●Information related to the QoS of the user’s DRB;

[0564] ■Configure the message of the mobile terminal of the second node.

[0565] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0566] The content of the response message 2 in step S502 may refer to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0567] Method 8 (the second node is a relay node 1): In this method, the first node determines the mapping of the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node, as well as the mapping of the user DRB and the backhaul link channel served by the distribution unit of the second node, and information related to the backhaul link channel served by the distribution unit of the second node:

[0568] The configuration message 1 in step S501 above includes at least one of the following information:

[0569] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0570] ■ identification information of the distribution unit of the second node;

[0571] ■ Information related to a newly created or existing backhaul link channel served by the distribution unit of the second node, the information including at least one of the following information:

[0572] ◆Identification information of the return link channel;

[0573] ◆Information related to the QoS of the backhaul link channel;

[0574] ◆Information of the backhaul link channel served by the mobile terminal of the second node corresponding to the backhaul link channel, such as the identifier of the backhaul link channel, which reflects the mapping relationship between the backhaul link channel served by the mobile terminal of the second node and the backhaul link channel served by the distribution unit of the second node;

[0575] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0576] ●User DRB ID;

[0577] ●Information related to the QoS of the user’s DRB;

[0578] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0579] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0580] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0581] ■ Information related to a newly created or existing user DRB served on the backhaul link served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0582] ◆User DRB ID;

[0583] ◆Information related to the QoS of the user’s DRB;

[0584] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0585] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0586] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0587] ◆Information of the backhaul link channel used to serve the user DRB, which can reflect the correspondence between the user DRB and the backhaul link channel served by the distribution unit of the second node, and the information includes at least one of the following information:

[0588] ●Identification information of the backhaul link channel;

[0589] ●QoS related information of the backhaul link channel;

[0590] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0591] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0592] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0593] ◆Identification information of the return link channel;

[0594] ◆Information related to the QoS of the backhaul link channel;

[0595] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0596] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0597] ●User DRB ID;

[0598] ●Information related to the QoS of the user’s DRB;

[0599] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0600] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0601] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention.

[0602] ■Configure the message of the mobile terminal of the second node.

[0603] ■Indication information related to the feedback information that the second node needs to provide, refer to the description of the indication information in the present invention.

[0604] The content of the response message 2 in step S502 may refer to method 1 in embodiment 4. Further, in one embodiment, the second node may determine the information to be included according to the "indication information related to feedback information required to be provided by the second node" sent by the first node.

[0605] Example 5 (the second node is Figure 1 When the relay node 2 in the configuration process between the first node and the second node)

[0606] When the second node is Figure 1 When the relay node is 2, the process between the first node and the second node is as follows: Figure 5 As shown, it can help the second node determine the mapping between the backhaul link channel served by the distribution unit of the second node and the user DRB. The method for implementing the process includes:

[0607] The configuration message 1 in step S501 above includes at least one of the following information:

[0608] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0609] ■ identification information of the distribution unit of the second node;

[0610] ■ Information related to a newly created or existing user DRB served by the distribution unit of the second node, for a user DRB, the information includes at least one of the following information:

[0611] ◆User DRB ID;

[0612] ◆Information related to the QoS of the user’s DRB;

[0613] ◆The address information of the target receiving node corresponding to the user's DRB, see the description of this information in the present invention;

[0614] ◆The address information of the source node corresponding to the user's DRB, see the description of this information in the present invention;

[0615] ◆Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0616] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0617] ■ Identification information of the mobile terminal of the second node, such as C-RNTI;

[0618] ■ Information about the backhaul link channel served by the mobile terminal of the second node, for one of the backhaul link channels, the information includes at least one of the following information:

[0619] ◆Identification information of the return link channel;

[0620] ◆Information related to the QoS of the backhaul link channel;

[0621] ◆Information about the maximum QoS that the backhaul link channel can accommodate;

[0622] ◆Information about the user DRB served on the backhaul link channel, which can reflect the correspondence between the backhaul link channel served by the mobile terminal of the second node and the user DRB, and the information includes at least one of the following information:

[0623] ●User DRB ID;

[0624] ●Information related to the QoS of the user’s DRB;

[0625] ● Address information of the target receiving node corresponding to the user DRB, see the description of this information in the present invention;

[0626] ● Address information of the source node corresponding to the user DRB, see the description of this information in the present invention;

[0627] ●Path identification information related to the transmission of the user DRB data packet, see the description of this information in the present invention;

[0628] ■Configure the message of the mobile terminal of the second node.

[0629] The response message 2 in the above step S502 includes at least one of the following information:

[0630] ■ Information about the user DRB accepted by the second node, such as the identifier of the user DRB;

[0631] ■ Information related to the distribution unit of the second node, which includes at least one of the following information:

[0632] ■ Information about the user DRBs that can or cannot be accommodated by the distribution unit of the second node and that are served by the distribution unit of the second node, the information comprising at least one of the following information:

[0633] ◆ Information about the newly created or existing user DRB accepted by the distribution unit of the second node, such as identification information of the user DRB;

[0634] ◆ Information about newly created or existing user DRBs that are not accepted by the distribution unit of the second node, such as user DRB identifiers;

[0635] ■Configuration information of other nodes (such as users, mobile terminals of other relay nodes) served by the distribution unit of the second node, such as Cell group configuration, see 3GPP TS38.331; in one embodiment, it may also include configuration information of the return link channel served by the distribution unit of the second node (such as RLC layer configuration, MAC layer configuration, PHY layer configuration, etc.).

[0636] ■Information related to the mobile terminal of the second node, the information including at least one of the following information:

[0637] ■ Information about the backhaul link channel served by the mobile terminal of the second node that can be accommodated or cannot be accommodated by the mobile terminal of the second node, the information comprising at least one of the following information:

[0638] ◆ Information about the return link channel served by the mobile terminal of the second node and acceptable to the mobile terminal of the second node, the information including at least one of the following information:

[0639] ● Identification information of the backhaul link channel;

[0640] ● QoS related information of the backhaul link channel generated by the second node;

[0641] ●Information related to the user DRB served by the backhaul link channel, such as the user DRB identifier;

[0642] ◆ Information related to the backhaul link channel served by the mobile terminal of the second node which cannot be accommodated by the mobile terminal of the second node, the information comprising at least one of the following information:

[0643] ● Identification information of the backhaul link channel;

[0644] ● QoS related information of the backhaul link channel suggested by the second node;

[0645] ■ Messages related to the mobile terminal configuring the second node.

[0646] Embodiment 6 (for Figure 1 The process of a user accessing relay node 2 configuring the distribution unit in the anchor node, relay node 1 and relay node 2)

[0647] exist Figure 1 In the example, the data packets of users accessing relay node 2 need to pass through the distribution unit in the anchor node, relay node 1 and relay node 2. In this process, these three nodes need to be configured. These three nodes determine the mapping between user DRBs and backhaul links, as well as the mapping between backhaul links carrying these user DRBs. Figure 8 The configuration process is shown:

[0648] Step S801: The process of the centralized unit configuring the distributed unit, see the process in Embodiment 3;

[0649] Step S802: The process of the central unit configuring the relay node 1, see the process in Embodiment 4;

[0650] Step S803: The process of the central unit configuring the relay node 2, see the process in Embodiment 5;

[0651] Step S804: a process of the centralized unit reconfiguring the relay node 1. This process is required if the configuration of the relay node 1 needs to be changed after the above steps. In this case, this process is required to reconfigure the relay node 1. See the process of Embodiment 4.

[0652] Step S805: a process of reconfiguring the distribution unit by the centralized unit. This process is required if the configuration of the distribution unit needs to be changed after the above steps. See the process of Example 3.

[0653] Step S806: After the above steps, the user's configuration information has been determined, and the centralized unit will configure the user, such as the centralized unit sending an RRCReconfiguration message to the user, and the user replies to the centralized unit with an RRCReconfigurationComplete message, see 3GPP TS38.331.

[0654] In the above steps, the order of S801 to S803 can be changed, the order of steps S804 to S805 can be changed, and steps S804 and S805 are optional steps.

[0655] Fig. 9 900 is a block diagram of an example hardware arrangement of an example device according to an embodiment of the present disclosure. The hardware arrangement 900 may be any of the first node (device) and the second node (device) described above. The hardware arrangement 900 may include a processor 901. The processor 901 may be a single processing unit or multiple processing units for performing different actions of the process described herein. The arrangement 900 may also include an input unit 902 for receiving signals from other entities, and an output unit 903 for providing signals to other entities. The input unit 902 and the output unit 903 may be arranged as a single entity or as separate entities.

[0656] Furthermore, the arrangement 900 may include at least one readable storage medium 904 in the form of a non-volatile or volatile memory, such as an electrically erasable programmable read-only memory (EEPROM), a flash memory, an optical disk, a Blu-ray disk and / or a hard drive. The readable storage medium 904 may include a computer program 905, which may include code / computer-readable instructions, which when executed by the processor 901 in the arrangement 900 enables the hardware arrangement 900 and / or a device including the hardware arrangement 900 to perform, for example, the above-mentioned combined operation. Figure 5-Figure 8 Any of the processes described in and any variations thereof.

[0657] The computer program 905 may be configured as computer program code having, for example, a computer program module 905A-905C architecture. Thus, in an example embodiment using the hardware arrangement 900 as a base station or a centralized unit of a base station, or a relay node, the code in the computer program of the arrangement 900 may be used to execute the instructions according to Figures 5 to 8 However, the computer program 905 may also include other modules for executing the various steps of the various methods described herein.

[0658] A computer program module can essentially execute Figures 5 to 8In other words, when different computer program modules are executed in the processor 901, they may correspond to various different units of the various devices mentioned in this article.

[0659] The processor may be a single CPU (central processing unit), but may also include two or more processing units. For example, the processor may include a general-purpose microprocessor, an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)). The processor may also include on-board memory for caching purposes. The computer program may be carried by a computer program product connected to the processor. The computer program product may include a computer-readable medium on which the computer program is stored. For example, the computer program product may be a flash memory, a random access memory (RAM), a read-only memory (ROM), an EEPROM, and the above-mentioned computer program modules may be distributed to different computer program products in the form of a memory within the UE in an alternative embodiment.

[0660] The present disclosure has been described so far in conjunction with the preferred embodiments. It should be understood that those skilled in the art may make various other changes, substitutions and additions without departing from the spirit and scope of the present disclosure. Therefore, the scope of the present disclosure is not limited to the above-mentioned specific embodiments, but should be limited by the appended claims.

[0661] In addition, functions described herein as being implemented by pure hardware, pure software, and / or firmware may also be implemented by dedicated hardware, a combination of general hardware and software, etc. For example, functions described as being implemented by dedicated hardware (e.g., field programmable gate array (FPGA), application specific integrated circuit (ASIC), etc.) may be implemented by a combination of general hardware (e.g., central processing unit (CPU), digital signal processor (DSP)) and software, and vice versa.

Claims

1. A method performed by a first node in a wireless communication system, the method comprising: Sending a user equipment UE context configuration request message to the second node, the message including information associated with a backhaul link channel to be established, the information including identification information of the backhaul link channel and first backhaul link channel mapping information; the first backhaul link channel mapping information indicates a first mapping relationship between a backhaul link channel served by a mobile terminal of the second node and a backhaul link channel served by a distribution unit of the second node, and a second mapping relationship between a backhaul link channel served by the distribution unit of the second node and a backhaul link channel served by the mobile terminal of the second node; receiving, from the second node, a UE context configuration response message in response to the UE context configuration request message; The user equipment UE context configuration request message and the UE context configuration response message include identification information of a mobile terminal of a third node served by a distribution unit of the second node to which the message is directed; The first backhaul link channel mapping information is used by the second node to determine and perform mapping of the backhaul link channel.

2. The method according to claim 1, characterized in that The information associated with the backhaul link channel to be established further includes: information related to the quality of service QoS of the backhaul link channel.

3. The method according to claim 1, characterized in that The first backhaul link channel mapping information includes at least one of the following: an ingress backhaul link channel identifier for configuring a first mapping in a downlink direction, an egress backhaul link channel identifier for configuring a first mapping in a downlink direction, an ingress backhaul link channel identifier for configuring a second mapping in an uplink direction, and an egress backhaul link channel identifier for configuring a second mapping in an uplink direction; Wherein, the backhaul link channel served by the mobile terminal of the second node in the first mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the first mapping for configuring the downlink direction; The backhaul link channel served by the distribution unit of the second node in the first mapping relationship includes a channel corresponding to the first mapped egress backhaul link channel identifier for configuring a downlink direction; The backhaul link channel served by the distribution unit of the second node in the second mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the second mapping for configuring the uplink direction; The backhaul link channel served by the mobile terminal of the second node in the second mapping relationship includes a channel corresponding to the second mapped egress backhaul link channel identifier for configuring the uplink direction.

4. The method according to claim 1, characterized in that: The UE context configuration request message includes at least one of a UE context establishment request message used on the F1 interface and a UE context modification request message used on the F1 interface; The UE context configuration response message includes at least one of a UE context establishment response message used on the F1 interface and a UE context modification response message used on the F1 interface; The UE context modification request message also includes information associated with the return link channel to be modified, the information including identification information of the return link channel to be modified, information related to the quality of service QoS of the return link channel to be modified, and at least one of second return link channel mapping information.

5. The method according to any one of claims 1 to 4, characterized in that: The first node includes a centralized unit of an anchor node; The second node comprises a relay node; The third node includes a relay node; Wherein, the relay node includes a distribution unit and a mobile terminal.

6. A method performed by a second node in a wireless communication system, the method comprising: Receiving a user equipment UE context configuration request message from the first node, the message including information associated with a backhaul link channel to be established, the information including identification information of the backhaul link channel and first backhaul link channel mapping information; the first backhaul link channel mapping information indicates a first mapping relationship between a backhaul link channel served by a mobile terminal of the second node and a backhaul link channel served by a distribution unit of the second node, and a second mapping relationship between a backhaul link channel served by the distribution unit of the second node and a backhaul link channel served by the mobile terminal of the second node; Sending a UE context configuration response message in response to the UE context configuration request message to the first node; The user equipment UE context configuration request message and the UE context configuration response message include identification information of a mobile terminal of a third node served by a distribution unit of the second node to which the message is directed; The first backhaul link channel mapping information is used by the second node to determine and perform mapping of the backhaul link channel.

7. The method according to claim 6, characterized in that The information associated with the backhaul link channel to be established further includes: information related to the quality of service QoS of the backhaul link channel.

8. The method according to claim 6, characterized in that The first backhaul link channel mapping information includes at least one of the following: an ingress backhaul link channel identifier for configuring a first mapping in a downlink direction, an egress backhaul link channel identifier for configuring a first mapping in a downlink direction, an ingress backhaul link channel identifier for configuring a second mapping in an uplink direction, and an egress backhaul link channel identifier for configuring a second mapping in an uplink direction; Wherein, the backhaul link channel served by the mobile terminal of the second node in the first mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the first mapping for configuring the downlink direction; The backhaul link channel served by the distribution unit of the second node in the first mapping relationship includes a channel corresponding to the first mapped egress backhaul link channel identifier for configuring a downlink direction; The backhaul link channel served by the distribution unit of the second node in the second mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the second mapping for configuring the uplink direction; The backhaul link channel served by the mobile terminal of the second node in the second mapping relationship includes a channel corresponding to the second mapped egress backhaul link channel identifier for configuring the uplink direction.

9. The method according to claim 6, characterized in that The UE context configuration request message includes at least one of a UE context establishment request message used on the F1 interface and a UE context modification request message used on the F1 interface; The UE context configuration response message includes at least one of a UE context establishment response message used on the F1 interface and a UE context modification response message used on the F1 interface; and The UE context modification request message also includes information associated with the return link channel to be modified, the information including identification information of the return link channel to be modified, information related to the quality of service QoS of the return link channel to be modified, and at least one of second return link channel mapping information.

10. The method according to any one of claims 6 to 9, characterized in that: The first node includes a centralized unit of an anchor node; The second node comprises a relay node; The third node includes a relay node; Wherein, the relay node includes a distribution unit and a mobile terminal.

11. A first node in a wireless communication system, comprising: Transceiver; and At least one processor configured to: Sending a user equipment UE context configuration request message to the second node, the message including information associated with a backhaul link channel to be established, the information including identification information of the backhaul link channel and first backhaul link channel mapping information; the first backhaul link channel mapping information indicates a first mapping relationship between a backhaul link channel served by a mobile terminal of the second node and a backhaul link channel served by a distribution unit of the second node, and a second mapping relationship between a backhaul link channel served by the distribution unit of the second node and a backhaul link channel served by the mobile terminal of the second node; receiving, from the second node, a UE context configuration response message in response to the UE context configuration request message; The user equipment UE context configuration request message and the UE context configuration response message include identification information of a mobile terminal of a third node served by a distribution unit of the second node to which the message is directed; The first backhaul link channel mapping information is used by the second node to determine and perform mapping of the backhaul link channel.

12. The first node according to claim 11, characterized in that: The information associated with the backhaul link channel to be established further includes: information related to the quality of service QoS of the backhaul link channel.

13. The first node according to claim 11, characterized in that: The first backhaul link channel mapping information includes at least one of the following: an ingress backhaul link channel identifier for configuring a first mapping in a downlink direction, an egress backhaul link channel identifier for configuring a first mapping in a downlink direction, an ingress backhaul link channel identifier for configuring a second mapping in an uplink direction, and an egress backhaul link channel identifier for configuring a second mapping in an uplink direction; Wherein, the backhaul link channel served by the mobile terminal of the second node in the first mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the first mapping for configuring the downlink direction; The backhaul link channel served by the distribution unit of the second node in the first mapping relationship includes a channel corresponding to the first mapped egress backhaul link channel identifier for configuring a downlink direction; The backhaul link channel served by the distribution unit of the second node in the second mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the second mapping for configuring the uplink direction; The backhaul link channel served by the mobile terminal of the second node in the second mapping relationship includes a channel corresponding to the second mapped egress backhaul link channel identifier for configuring the uplink direction.

14. The first node according to claim 11, characterized in that: The UE context configuration request message includes at least one of a UE context establishment request message used on the F1 interface and a UE context modification request message used on the F1 interface; The UE context configuration response message includes at least one of a UE context establishment response message used on the F1 interface and a UE context modification response message used on the F1 interface; The UE context modification request message also includes information associated with the return link channel to be modified, the information including identification information of the return link channel to be modified, information related to the quality of service QoS of the return link channel to be modified, and at least one of second return link channel mapping information.

15. The first node according to any one of claims 11 to 14, characterized in that: The first node includes a centralized unit of an anchor node; The second node comprises a relay node; The third node includes a relay node; Wherein, the relay node includes a distribution unit and a mobile terminal.

16. A second node in a wireless communication system, comprising: transceiver, and At least one processor configured to: Receiving a user equipment UE context configuration request message from the first node, the message including information associated with a backhaul link channel to be established, the information including identification information of the backhaul link channel and first backhaul link channel mapping information; the first backhaul link channel mapping information indicates a first mapping relationship between a backhaul link channel served by a mobile terminal of the second node and a backhaul link channel served by a distribution unit of the second node, and a second mapping relationship between a backhaul link channel served by the distribution unit of the second node and a backhaul link channel served by the mobile terminal of the second node; Sending a UE context configuration response message in response to the UE context configuration request message to the first node; The user equipment UE context configuration request message and the UE context configuration response message include identification information of a mobile terminal of a third node served by a distribution unit of the second node to which the message is directed; The first backhaul link channel mapping information is used by the second node to determine and perform mapping of the backhaul link channel.

17. The second node according to claim 16, characterized in that: The information associated with the backhaul link channel to be established further includes: information related to the quality of service QoS of the backhaul link channel.

18. The second node according to claim 16, characterized in that: The first backhaul link channel mapping information includes at least one of the following: an ingress backhaul link channel identifier for configuring a first mapping in a downlink direction, an egress backhaul link channel identifier for configuring a first mapping in a downlink direction, an ingress backhaul link channel identifier for configuring a second mapping in an uplink direction, and an egress backhaul link channel identifier for configuring a second mapping in an uplink direction; The backhaul link channel served by the mobile terminal of the second node in the first mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the first mapping for configuring the downlink direction; The backhaul link channel served by the distribution unit of the second node in the first mapping relationship includes a channel corresponding to the first mapped egress backhaul link channel identifier for configuring a downlink direction; The backhaul link channel served by the distribution unit of the second node in the second mapping relationship includes a channel corresponding to the ingress backhaul link channel identifier of the second mapping for configuring the uplink direction; The backhaul link channel served by the mobile terminal of the second node in the second mapping relationship includes a channel corresponding to the second mapped egress backhaul link channel identifier for configuring the uplink direction.

19. The second node according to claim 16, characterized in that: The UE context configuration request message includes at least one of a UE context establishment request message used on the F1 interface and a UE context modification request message used on the F1 interface; The UE context configuration response message includes at least one of a UE context establishment response message used on the F1 interface and a UE context modification response message used on the F1 interface; The UE context modification request message also includes information associated with the return link channel to be modified, the information including identification information of the return link channel to be modified, information related to the quality of service QoS of the return link channel to be modified, and at least one of second return link channel mapping information.

20. The second node according to any one of claims 16 to 19, characterized in that: The first node includes a centralized unit of an anchor node; The second node comprises a relay node; The third node includes a relay node; Wherein, the relay node includes a distribution unit and a mobile terminal.

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