US 12,363,608 B2
Routing method and apparatus
Yibin Zhuo, Shenzhen (CN); Yuanping Zhu, Shanghai (CN); Yulong Shi, Beijing (CN); Mingzeng Dai, Shenzhen (CN); and Jing Liu, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Feb. 15, 2022, as Appl. No. 17/672,363.
Application 17/672,363 is a continuation of application No. PCT/CN2020/109388, filed on Aug. 14, 2020.
Claims priority of application No. 201910755511.7 (CN), filed on Aug. 15, 2019.
Prior Publication US 2022/0174579 A1, Jun. 2, 2022
Int. Cl. H04W 40/22 (2009.01); H04L 45/74 (2022.01); H04L 69/22 (2022.01)
CPC H04W 40/22 (2013.01) [H04L 45/74 (2013.01); H04L 69/22 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A downlink data transmission method, comprising:
obtaining, by a first node, a mapping relationship between an Internet Protocol (IP) address of a destination node configured by a donor centralized unit (donor CU) and a Backhaul Adaptation Protocol (BAP) address of the destination node, wherein the first node is a donor distributed unit (donor DU);
determining, by the first node, the BAP address of the destination node based on the mapping relationship and the IP address of the destination node that is carried in a downlink data packet, wherein a BAP header of the downlink data packet includes first information indicating that the BAP header does not include a routing path identifier of the downlink data packet, and wherein the BAP header of the downlink data packet includes a BAP address of a source node of the downlink data packet;
determining, by the first node, a first path between the first node and the destination node based on a differentiated services code point (DSCP) or a flow label carried in the downlink data packet; and
sending, by the first node, the downlink data packet to the destination node on the first path based on the BAP address of the destination node.