US 11,985,589 B2
Method, device, and system for network switching involving network slice selection
Zaifeng Zong, Nanjing (CN); and Fenqin Zhu, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd, Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Nov. 18, 2020, as Appl. No. 16/951,489.
Application 16/951,489 is a continuation of application No. PCT/CN2019/087649, filed on May 20, 2019.
Claims priority of application No. 201810491230.0 (CN), filed on May 21, 2018.
Prior Publication US 2021/0076318 A1, Mar. 11, 2021
Int. Cl. H04W 4/00 (2018.01); H04W 8/12 (2009.01); H04W 36/32 (2009.01); H04W 48/18 (2009.01); H04W 80/10 (2009.01)
CPC H04W 48/18 (2013.01) [H04W 8/12 (2013.01); H04W 36/32 (2013.01); H04W 80/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by an access and mobility management function network element in a visited network in a home-routed roaming operation in which a terminal accesses the visited network, comprising:
obtaining single network slice selection assistance information (S-NSSAI) for a home network corresponding to a session of the terminal, wherein the access and mobility management function network element receives the S-NSSAI for the home network from a visited session management network element in the visited network;
obtaining S-NSSAI for the visited network corresponding to the session of the terminal, based on a mapping relationship between the S-NSSAI for the home network and the S-NSSAI for the visited network; and
sending, the S-NSSAI for the visited network to an access device of the terminal in the visited network.