Patent ID: 6434396
Filing Date: 2002-08-13
Classification: G01S,H04W

Abstract:
A method in a cellular radio communications system, wherein the cellular radio communications system contains a stationary part comprising a plurality of central nodes and a plurality of base stations, and a mobile part comprising a plurality of mobile stations, the method for transmitting a message composed of at least one communication data unit to a specific mobile station, comprising the steps of:selecting a group of base stations comprising at least two base stations that are in the vicinity of the specific mobile station at the time of transmitting, defining a multicast connection between a central node and the base stations in the selected group, multicasting at least one first communication data unit of the message from the central node to the base stations in the selected group via the multicast connection, said at least one first communication data unit comprising one of payload data and channel allocation data, and simultaneously sending an initial signal which includes at least said first communication data unit of the message from the base stations in the selected group to the mobile station.