Patent ID: 6522634
Filing Date: 2003-02-18
Classification: H04M,H04W

Abstract:
A wireless transmission system comprising:a main device and a plurality of auxiliary devices that communicate data therebetween using a multiple access transmission scheme, wherein the main device transmits to the plurality of auxiliary devices over an outgoing frequency of a single wireless channel, the plurality of auxiliary devices transmit to the main device over an incoming frequency of the single wireless channel, and the main device and the plurality of auxiliary devices communicate in time slots that repeat in cycles, each cycle including: a first time slot allotted for the main device to transmit a call signal to the plurality of auxiliary devices; a second time slot allotted for at least one of the plurality of auxiliary devices to transmit a notification signal notifying that the single wireless channel is presently being used; and a third time slot allotted for any of the plurality of auxiliary devices to transmit a response signal resending to the call signal from the main device.