US 11,870,856 B2
Session establishment method and apparatus
Zaifeng Zong, Nanjing (CN); and Fenqin Zhu, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 6, 2022, as Appl. No. 18/075,981.
Application 18/075,981 is a continuation of application No. 17/074,897, filed on Oct. 20, 2020, granted, now 11,533,375.
Application 17/074,897 is a continuation of application No. 16/427,990, filed on May 31, 2019, granted, now 10,834,209.
Application 16/427,990 is a continuation of application No. PCT/CN2018/116064, filed on Nov. 17, 2018.
Claims priority of application No. 201711148057.6 (CN), filed on Nov. 17, 2017; and application No. 201810037192.1 (CN), filed on Jan. 15, 2018.
Prior Publication US 2023/0179664 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 67/146 (2022.01); H04W 60/04 (2009.01); H04W 36/00 (2009.01); H04W 84/04 (2009.01)
CPC H04L 67/146 (2013.01) [H04W 36/00 (2013.01); H04W 36/0022 (2013.01); H04W 60/04 (2013.01); H04W 84/042 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method, comprising:
sending, by a home control plane function entity to a terminal during establishment of a packet data network (PDN) connection in a fourth generation (4G) network, home public land mobile operator network (PLMN) single network slice selection assistance information (S-NSSAI) corresponding to the PDN connection;
receiving, by an access and mobility management function in a fifth generation (5G) network from the terminal, a registration request comprising the home PLMN S-NSSAI;
obtaining, by the access and mobility management function based on visited PLMN S-NSSAI and subscribed S-NSSAI of the terminal, allowed S-NSSAI of a visited PLMN, wherein the visited PLMN S-NSSAI is mapped from the home PLMN S-NSSAI, and wherein the allowed S-NSSAI indicates a network slice of the visited PLMN that the terminal is allowed to access; and
sending, by the access and mobility management function, a registration response to the terminal, wherein the registration response includes the allowed S-NSSAI.