US 12,490,332 B2
RLF recovery method and apparatus for IAB network, and related device
Yuanping Zhu, Shanghai (CN); Haiyan Luo, Shenzhen (CN); Jing Liu, Shanghai (CN); Zhenzhen Cao, Boulogne Billancourtt (FR); and Yulong Shi, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Apr. 21, 2023, as Appl. No. 18/304,475.
Application 18/304,475 is a continuation of application No. PCT/CN2020/123025, filed on Oct. 22, 2020.
Prior Publication US 2023/0309172 A1, Sep. 28, 2023
Int. Cl. H04W 76/19 (2018.01)
CPC H04W 76/19 (2018.02) 16 Claims
OG exemplary drawing
 
10. A communication system, the communication system comprising:
an integrated access and backhaul (IAB) node and a target IAB donor;
wherein the first IAB node is configured to:
set up a first radio resource control (RRC) connection to the target IAB donor by performing radio link failure (RLF) recovery; and
after setting up the first RRC connection to the target IAB donor by performing the RLF recovery, send a first message to a second node by using a signaling radio bearer (SRB) 1 or an SRB 2, or send a backhaul radio link failure indication (BH RLF) indication to a second node, wherein the first message or the BH RLF indication is used to set up a second RRC connection between the second node and the target IAB donor, wherein
before setting up the first RRC connection to the target IAB donor by performing the RLF recovery, the second node is connected to a source IAB donor through the first IAB node, and the second node is a child node or a descendent user equipment (UE) of the first IAB node;
wherein the target IAB donor is configured to:
send a second message to the first IAB node, wherein the second message is used by the first IAB node to send the first message to the second node based on the second message by using the SRB 1 or the SRB 2 or used by the first IAB node to send the BH RLF indication to a second node,
wherein the first message is an RRC message, and wherein the first IAB node is further configured to receive a second message from the target IAB donor, wherein the second message comprises an SRB identifier and the RRC message, and the SRB identifier comprises an identifier of the SRB 1 and an identifier of the SRB 2.