US 12,219,651 B2
Communication method, source base station, target base station, core network device, and terminal device
Yinghao Jin, Shanghai (CN); Henrik Olofsson, Kista (SE); Feng Han, Shanghai (CN); and Wei Tan, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Aug. 3, 2023, as Appl. No. 18/364,932.
Application 18/364,932 is a continuation of application No. 17/199,928, filed on Mar. 12, 2021, granted, now 11,758,441.
Application 17/199,928 is a continuation of application No. 16/443,304, filed on Jun. 17, 2019, granted, now 10,952,105, issued on Mar. 16, 2021.
Application 16/443,304 is a continuation of application No. PCT/CN2018/099875, filed on Aug. 10, 2018.
Claims priority of application No. 201710686415.2 (CN), filed on Aug. 11, 2017.
Prior Publication US 2024/0040443 A1, Feb. 1, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04W 8/08 (2009.01); H04W 36/08 (2009.01); H04W 76/27 (2018.01); H04W 76/30 (2018.01); H04W 80/10 (2009.01)
CPC H04W 76/30 (2018.02) [H04W 8/08 (2013.01); H04W 36/0011 (2013.01); H04W 36/0079 (2018.08); H04W 36/08 (2013.01); H04W 76/27 (2018.02); H04W 80/10 (2013.01); H04W 36/087 (2023.05)] 13 Claims
OG exemplary drawing
 
1. A communications method, comprising:
receiving, by a core network device, a path switch request from a target access network device, wherein the path switch request comprises an identifier of an accepted session that is accepted by the target access network device during handover and an identifier of a rejected session that is rejected by the target access network device during the handover;
performing, by the core network device, path switch of the accepted session;
deactivating or releasing, by the core network device, the rejected session; and
sending, by the core network device, a path switch request response message to the target access network device, wherein the path switch request response message comprises an identifier of a session for which path switch has been successfully completed, and cause information indicating a rejection reason for rejecting the rejected session, wherein the cause information indicates at least one of the following:
that the target access network device does not support a network slice corresponding to the rejected session, or
that a resource is not available for a network slice corresponding to the rejected session and the network slice is supported by the target access network device.