Method for simultaneous communications with multiple base stations and related communication device

摘要

A method of handling simultaneous communications in a communication system comprises a user equipment (UE), a first base station and the second base station, where the UE has been connected to the first base station. The method comprises the first base station determining to allocate a cell of the second base station to the UE; the first base station transmitting a cell addition request message to the second base station in response to the determination, for requesting the second base station to allocate radio resources of the cell of the second base station to communicate with UE; and the first base station transmitting a first radio resource control (RRC) message to the UE, wherein the first RRC message comprises information related to the security key and information related to the security algorithm.

主权项

1. A method of handling simultaneous communications in a communication system comprising a user equipment (UE), a first base station and the second base station, where the UE has been connected to the first base station, the method comprising:
the first base station communicating with the UE using a first security key and a first security algorithm; the first base station determining to allocate a cell of the second base station to the UE; the first base station transmitting a cell addition request message to the second base station in response to the determination, for requesting the second base station to allocate radio resources of the cell of the second base station to communicate with the UE; the first base station receiving a cell addition response message from the second base station in response to the cell addition request message; and the first base station transmitting a first radio resource control (RRC) message to the UE, wherein the first RRC message comprises information related to a second security key and information related to a second security algorithm; wherein the second security key is used for communication between the UE and the second base station and different form the first security key; wherein the first base station receives a RRC response message from the UE which is transmitted in response to the first RRC message; the first base station transmits a cell addition confirm message to the second base station, after the first base station receives the RRC response message from the UE which is transmitted in response to the first RRC message; and the RRC response message is protected according to the first security key and the first security algorithm.