Patent ID: 6351469
Filing Date: 2002-02-26
Classification: H04N

Abstract:
A communication method for simultaneously providing a bidirectional communication service from a center device to a plurality of terminals by using a 1-to-multiple broadcasting network configured between the center device and the plurality of terminals, comprising the steps of:detecting an idle/busy state of a first medium signal in the center device; managing the detected idle/busy state as first medium idle/busy information in the center device; notifying the plurality of terminals of the first medium idle/busy information in the center device; updating the first medium idle/busy information that the center device and the plurality of terminals respectively store in synchronization with each other in the center device and the plurality of terminals; allocating an idle communication channel among communication channels to be allocated to the first medium signal based on the first medium idle/busy information that the center device and the plurality of terminals respectively store, in the center device and the plurality of terminals; and communicating a transmission frame including a group of communication channels to which the first and second medium signals are allocated between the center device and the plurality of terminals.