US-12621880-B2 - Identifier management method and apparatus

US12621880B2US 12621880 B2US12621880 B2US 12621880B2US-12621880-B2

Abstract

Examples in this application provide an identifier management method and apparatus. One example method includes receiving, by a first donor node, first indication information sent by a first node, where the first indication information indicates that the first node can be configured to provide a wireless backhaul service, and sending, by the first donor node to the first node, a first identifier, where the first identifier uniquely identifies the first node on a wireless backhaul link within a service range of the first donor node.

Inventors

Yuanping Zhu
Mingzeng Dai
Yibin ZHUO
Jing Liu

Assignees

HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210813
Priority Date: 20190215

Claims (12)

1 . An identifier management method, comprising: receiving, by a first donor node, first indication information sent by a first node to the first donor node, wherein the first indication information indicates to the first donor node that the first node is an integrated access and backhaul (IAB) node; in response to receiving the first indication information, obtaining, by the first donor node, a first identifier, wherein the first identifier includes an IP address of the first node that is allocated by an OAM to the first node; sending, by the first donor node, handover request information to a second donor node, wherein the handover request information requests to connect the first node to the second donor node; receiving, by the first donor node from the second donor node, identification information of the first node allocated by the second donor node, wherein the identification information of the first node is an adaptation layer identifier; and in response to receiving the identification information of the first node from the second donor node, sending, by the first donor node to the first node, a handover command, wherein the handover command carries the identification information of the first node; wherein the first donor node comprises a distributed unit (DU) and a centralized unit (CU), and wherein the method further comprises: receiving, by the DU, first configuration information sent by the CU, wherein the first configuration information comprises a first adaptation layer identifier of the first node and the IP address of the first node; receiving, by the DU, a first data packet sent by the CU, wherein the first data packet comprises the IP address of the first node and data; and sending, by the DU to the first node, a second data packet, wherein the second data packet comprises the IP address of the first node and the data.
2 . The method according to claim 1 , wherein the method further comprises: allocating, by the first donor node to the first node, the first adaptation layer identifier of the first node; sending, by the first donor node to the first node, the first adaptation layer identifier of the first node; and sending, by the first donor node to a second node, the first adaptation layer identifier of the first node, wherein the second node is a parent node of the first node.
3 . The method according to claim 2 , wherein sending, by the first donor node to the first node, the first adaptation layer identifier of the first node comprises: sending, by the first donor node to the first node, an F1 application protocol (F1AP) message comprising the first adaptation layer identifier of the first node.
4 . The method according to claim 1 , wherein the method further comprises: receiving, by the DU from the CU, an adaptation layer identifier which is allocated by the CU to the DU.
5 . The method according to claim 1 , wherein the method further comprises: receiving, by the DU, a third data packet which comprises an IP layer identifier of a target wireless backhaul node; and adding, by the DU, an adaptation layer identifier of the target wireless backhaul node into the third data packet.
6 . The method according to claim 1 , wherein the first indication information further indicates the first donor node to allocate a first adaptation layer identifier to the first node.
7 . The method according to claim 1 , wherein the first indication information further indicates the first donor node to allocate the first identifier to the first node, and the first identifier further includes an identifier of the first donor node.
8 . A first donor node, comprising at least one processor and at least memory storing instructions, wherein the instructions are executed by the at least one processor to cause the first donor node to perform a method of: receiving first indication information sent by a first node to the first donor node, wherein the first indication information indicates to the first donor node that the first node is an integrated access and backhaul (IAB) node; in response to receiving the first indication information, obtaining a first identifier, wherein the first identifier includes an IP address of the first node that is allocated by an OAM to the first node; sending handover request information to a second donor node, wherein the handover request information requests to connect the first node to the second donor node; receiving, from the second donor node, identification information of the first node allocated by the second donor node, wherein the identification information of the first node is an adaptation layer identifier; and in response to receiving the identification information of the first node from the second donor node, sending, to the first node, a handover command, wherein the handover command carries the identification information of the first node; wherein the first donor node comprises a distributed unit (DU) and a centralized unit (CU), and wherein the DU is configured to: receive first configuration information sent by the CU, wherein the first configuration information comprises a first adaptation layer identifier of the first node and the IP address of the first node; receive a first data packet sent by the CU, wherein the first data packet comprises the IP address of the first node and data; and send a second data packet to the first node, wherein the second data packet comprises the IP address of the first node and the data.
9 . The node according to claim 8 , wherein the method further comprises: allocating, to the first node, the first adaptation layer identifier of the first node; sending, to the first node, the first adaptation layer identifier of the first node; and sending, to a second node, the first adaptation layer identifier of the first node, wherein the second node is a parent node of the first node.
10 . The node according to claim 9 , wherein sending, to the first node, the first adaptation layer identifier of the first node comprises: sending, to the first node, an F1 application protocol (F1AP) message comprising the first adaptation layer identifier of the first node.
11 . The node according to claim 8 , wherein the DU is configured to receive, from the CU, an adaptation layer identifier which is allocated by the CU to the DU.
12 . The node according to claim 8 , wherein the DU is configured to: receive a third data packet comprising an IP layer identifier of a target wireless backhaul node; and add an adaptation layer identifier of the target wireless backhaul node into the third data packet.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2019/079366, filed on Mar. 22, 2019, which claims priority to Chinese Patent Application No. 201910117983.X, filed on Feb. 15, 2019. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the communications field, and more specifically, to an identifier management method and apparatus. BACKGROUND In a network including integrated access and backhaul (IAB) nodes, there are a plurality of transmission links on a transmission path between UE and an IAB donor (IAB Donor, which is also referred to as a donor node, or referred to as a donor gNB). The transmission links include at least one wireless backhaul link and one wireless access link. The access link is a communications link between the UE and an IAB node. The wireless backhaul link is a communications link between IAB nodes or between an IAB node and the donor node. A data packet needs to pass through a plurality of intermediate nodes when transmission of the data packet is performed between the UE and the IAB donor. Both the donor node and the IAB node need to perform route selection on the data packet, determine a next-hop node, and then forward the data packet. The route selection needs to be performed based on routing information carried in the data packet. For downlink transmission, an identifier of an IAB node may be used as routing information of a data packet in a transmission process on a wireless backhaul link. Although the IAB node may obtain a cell radio network temporary identifier (C-RNTI) from a parent node, the identification information is used to uniquely identify the IAB node only in a cell served by the parent node, and the identification information cannot be used to address the IAB node on a wireless backhaul link within a service range of the donor node. Therefore, how to use an effective method for managing an identifier of an IAB node becomes an urgent problem to be resolved. SUMMARY This application provides an identifier management method and apparatus, to reduce routing overheads in an air interface transmission process in an IAB network, thereby improving data transmission efficiency in the IAB network. According to a first aspect, an identifier management method is provided, where the method includes: A first donor node receives first indication information sent by a first node, where the first indication information is used to indicate that the first node can be configured to provide a wireless backhaul service. The first donor node sends a first identifier to the first node, where the first identifier is used to uniquely identify the first node on a wireless backhaul link within a service range of the first donor node. With reference to the first aspect, in some implementations of the first aspect, the first identifier includes an identifier of the first donor node and identification information specific to the first node. Optionally, the first node may be an integrated access and backhaul (IAB) node or a relay node in an LTE system. With reference to the first aspect, in some implementations of the first aspect, the method further includes: The first donor node sends the first identifier to a second node, where the second node is a parent node of the first node. Optionally, the first identifier may be an adaptation layer identifier of the first node. With reference to the first aspect, in some implementations of the first aspect, the first donor node includes a distributed unit DU and a centralized unit CU, and the method further includes: The distributed unit DU receives first configuration information sent by the centralized unit CU, where the first configuration information includes an identifier of the first node and an IP layer identifier of the first node. Optionally, the first configuration information further includes an identifier of a third node. The third node is a child node of the first donor node. In other words, a donor node donor CU may perform route configuration on a donor DU. With reference to the first aspect, in some implementations of the first aspect, the first donor node includes a distributed unit DU and a centralized unit CU, and the centralized unit CU includes a control plane CU-CP and a user plane CU-UP. The method further includes: The CU-CP obtains an IP layer identifier of the first node, and the CU-CP sends the IP layer identifier of the first node to the CU-UP. For example, the IP layer identifier of the first node may be an IPv4 address or an IPv6 address of the first node. With reference to the first aspect, in some implementations of the first aspect, the method further includes: The first donor node sends first request information to a second donor node, where the first request information is used to request the first node to be handed over to the second donor node. The first d