Patent ID: 6259683
Filing Date: 2001-07-10
Classification: H04W

Abstract:
A method for use in controlling switching of a communication channel when a mobile station located in a first service area moves to a second service area adjoining the first service area, said method also for use with a mobile communication control center and a plurality of base stations, each of which is capable of setting up a communication channel with the mobile station for interchanging communication data and for controlling communication channel switching to be effected between two or more of the plurality of base stations and for multicasting the communication data to the two or more base stations to which the communication channel may be switched, said method comprising:decomposing the communication data, which are to be multicast, into decomposed data having a unit time interval shorter than a frame length;adding an unconditional identification code to each of the decomposed data;determining, with a first base station holding a communication channel with the mobile station, leading data of a next frame period in consideration of a second base station expected to newly set up the communication channel; andsending an identification code corresponding to the leading data to the second base station before the second base station sets up the communication channel.