US 11,689,972 B2
Handover method, information exchange method, device and computer readable storage medium
Fang Xie, Beijing (CN); Zhuo Chen, Beijing (CN); Liang Liu, Beijing (CN); and Na Li, Beijing (CN)
Assigned to China Mobile Communication Co., Ltd Research Institute, Beijing (CN); and China Mobile Communications Group Co., Ltd., Beijing (CN)
Appl. No. 16/966,104
Filed by China Mobile Communication Co., Ltd Research Institute, Beijing (CN); and China Mobile Communications Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 21, 2019, PCT No. PCT/CN2019/072506
§ 371(c)(1), (2) Date Jul. 30, 2020,
PCT Pub. No. WO2019/149101, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 201810089284.4 (CN), filed on Jan. 30, 2018.
Prior Publication US 2021/0037431 A1, Feb. 4, 2021
Int. Cl. H04W 4/00 (2018.01); H04W 36/00 (2009.01)
CPC H04W 36/0027 (2013.01) [H04W 36/0085 (2018.08)] 11 Claims
OG exemplary drawing
 
1. A handover method, comprising:
transmitting, by a first network device, a handover request message associated with user equipment (UE) to at least one candidate second network device;
receiving, by the first network device, a handover request acknowledge message transmitted by the at least one candidate second network device, wherein the handover request acknowledge message carries multi-connectivity capability information of the candidate second network device;
wherein
the multi-connectivity capability information comprises information of one or more cells capable of performing multi-connectivity with the candidate second network device;
wherein the multi-connectivity capability information carried in the handover request acknowledge message comprises:
cell identifiers (IDs) of the cells capable of performing multi-connectivity with the candidate second network device, or,
a bitmap, wherein bits in the bitmap correspond, in a one-to-one relationship, to cells whose information are carried in the handover request message, and a value of each bit represents whether a corresponding cell is capable of performing multi-connectivity with the candidate second network device;
wherein, prior to transmitting the handover request message, the method further comprises:
acquiring, by the first network device, multi-connectivity capability information of another network device and/or transmitting, by the first network device, multi-connectivity capability information of the first network device to another network device when an interface between the first network device and the another network device is being set up or when a configuration of the first network device or the another network device is being updated through an interface between the first network device and the another network device.