Patent ID: 6643515
Filing Date: 2003-11-04
Classification: H04B,H04J,H04L,H04Q,H04W

Abstract:
A method of registering a communications terminal with a satellite communications system including a satellite generating a plurality of spot beams each carrying at least one spot beam transmission channel and a global beam substantially encompassing the plurality of spot beams and carrying at least one global beam reception channel and at least one global beam transmission channel, said method comprising:receiving a call on one said spot beam transmission channel; ceasing reception of said call; subsequently determining whether said one spot beam transmission channel is receivable by said terminal; and, if said one spot beam transmission channel is not receivable, transmitting a registration message in said global beam reception channel; receiving a spot beam channel allocation signal in said global beam transmission channel; and receiving a further said spot beam transmission channel selected according to said spot beam channel allocation signal.