Patent ID: 9560556
Date: 2017-01-31
CPC Classifications: H04W

Claim:
1. A method of handling handover for a network of a wireless communication system, wherein a user equipment (UE) is connected to at least one first cell of a master base station and at least one second cell of a secondary base station of the network, the method comprising: when the master base station decides to hand over the UE to a target master base station of the network, transmitting, by the master base station, a first message to the secondary base station to instruct the secondary base station to release the at least one second cell after the master base station receives a handover request acknowledgement message from the target master base station, wherein the handover request acknowledgement message is transmitted in response to a handover request that the master base station sent to the target master base station; and transmitting, by the master base station, a handover command to the UE after the master base station receives a handover request acknowledgement message from the target master base station, after the master base station transmits the first message to the secondary base station, or after the master base station receives a second message sent from the secondary base station in response to the secondary base station receiving the first message, wherein the handover command instructs the UE to hand over to the target master base station and remove the at least one second cell of the secondary base station.