Patent ID: 8583123

Claim:
A method for controlling radio links in a cellular communication system, executed by a first user equipment, wherein the cellular communication system comprises the first user equipment, a second user equipment, a first base station, a second base station, and a system controller, and the first user equipment receives a plurality of messages from the first base station and the second base station and communicates with the second user equipment via a first radio link of the first base station and a second radio link of the second base station, the first radio link and the second radio link form an active set of the first user equipment, and the system controller manages the first radio link and the second radio link, the method comprising: receiving, an active set update message from the system controller via at least one of the first radio link and the second radio link, wherein the active set update message directs the first user equipment to terminate the first radio link; a 4 ˜ determining whether a content of the active set update message specifies a valid configuration; determining whether to continue a communication status of the first radio link when the content of the active set update message specifies a valid configuration; transmitting a failure message to the system controller to indicate failure of the active set update, and continuing the first radio link and the second radio link when the communication status of the first radio link is determined to be continued and transmitting a complete message to the system controller to indicate completion of the active set update, and terminating the first radiolink when the communication status of the first radio link is determined to be terminated.