US 12,355,671 B2
Data transmission method and apparatus
Caixia Qi, Shanghai (CN); Han Zhou, Shanghai (CN); and Hancheng Li, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Aug. 11, 2022, as Appl. No. 17/886,008.
Application 17/886,008 is a continuation of application No. PCT/CN2020/134267, filed on Dec. 7, 2020.
Claims priority of application No. 202010089277.1 (CN), filed on Feb. 12, 2020.
Prior Publication US 2022/0385589 A1, Dec. 1, 2022
Int. Cl. H04L 12/66 (2006.01); H04L 1/1607 (2023.01); H04L 12/46 (2006.01); H04L 47/34 (2022.01); H04W 28/06 (2009.01)
CPC H04L 47/34 (2013.01) [H04L 1/1642 (2013.01); H04L 12/4633 (2013.01); H04W 28/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A data transmission method, comprising:
receiving, by a user plane function network element, a first request message from a session management function network element, wherein the first request message requests setup or update of a transmission tunnel between the user plane function network element and an access network device, wherein the first request message comprises a first forwarding rule (FAR) associated with a downlink data packet detection rule, and the first FAR comprises first indication information indicating whether or not the user plane function network element needs to perform redundant transmission;
receiving, by the user plane function network element, a first data packet from a data network;
determining, by the user plane function network element based on the first data packet, the first FAR associated with the downlink data packet detection rule;
in response to the first indication information indicating the user plane function network element needs to perform redundant transmission, replicating, by the user plane function network element, the first data packet based on the first indication information, to obtain a second data packet; and
sending, by the user plane function network element, the first data packet and the second data packet to an access network device via a first tunnel and a second tunnel respectively, wherein the first data packet and the second data packet comprise a first sequence number.