US 12,445,914 B2
Selecting a base unit in response to a handover condition being triggered
Lianhai Wu, Beijing (CN); Jing Han, Beijing (CN); Haiming Wang, Beijing (CN); Zhuoyun Zhang, Beijing (CN); and Hongchao Li, Beijing (CN)
Assigned to Lenovo (Beijing) Limited, Beijing (CN)
Filed by Lenovo (Beijing) Limited, Beijing (CN)
Filed on Dec. 2, 2022, as Appl. No. 18/073,967.
Application 18/073,967 is a continuation of application No. 16/959,952, granted, now 11,595,863, previously published as PCT/CN2018/072118, filed on Jan. 10, 2018.
Prior Publication US 2023/0098506 A1, Mar. 30, 2023
Int. Cl. H04W 36/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 36/0061 (2013.01) [H04W 36/0072 (2013.01); H04W 74/0833 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method performed by a first base station, the method comprising:
receiving, in response to a user equipment (UE) not receiving a response to a first random access preamble transmitted from the UE to a second base station, a random access message from the UE;
in response to receiving the random access message, transmitting, to the second base station, a request for sequence number transfer information;
subsequent to transmitting the request for sequence number transfer information, transmitting a random access response message to the UE;
receiving sequence number transfer information from the second base station in response to transmitting the request for the sequence number transfer information; and
transmitting a handover completion message to the second base station in response to receiving the sequence number transfer information.