US 11,758,441 B2
Communication method, source base station, target base station, core network device, and terminal device
Yinghao Jin, Shanghai (CN); Henrik Olofsson, Stockholm (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 Mar. 12, 2021, as Appl. No. 17/199,928.
Application 17/199,928 is a continuation of application No. 16/443,304, filed on Jun. 17, 2019, granted, now 10,952,105.
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 2021/0282058 A1, Sep. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04W 76/30 (2018.01); H04W 76/27 (2018.01); H04W 8/08 (2009.01); H04W 36/08 (2009.01); H04W 36/30 (2009.01); H04W 80/10 (2009.01)
CPC H04W 36/0022 (2013.01) [H04W 8/08 (2013.01); H04W 36/0011 (2013.01); H04W 36/0079 (2018.08); H04W 36/08 (2013.01); H04W 36/30 (2013.01); H04W 76/27 (2018.02); H04W 76/30 (2018.02); H04W 80/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A communications method, comprising:
receiving, by a target access network device, a handover request from a source access network device, wherein the handover request comprises identifiers of sessions requested to be handed over;
performing, by the target access network device, an admission control based on the handover request;
sending, by the target access network device, a path switch request to a core network device, wherein the path switch request comprises an identifier of an accepted session that is accepted by the target access network device, an identifier of a rejected session that is rejected by the target access network device and cause information indicating a rejection reason for rejecting the rejected session, wherein the identifier of the rejected session informs the core network device the rejected session that is rejected by the target access network device, wherein the cause information comprises that the target access network device does not support a network slice corresponding to the rejected session, or a resource is not available for the network slice corresponding to the rejected session and the network slice is supported by the target access network device; and
receiving, by the target access network device, a path switch request response message from the core network device, wherein the path switch request response message comprises an identifier of a session for which path switch has been successfully completed.