Patent ID: 8543122
Filing Date: 2013-09-24
Classification: H04B,H04W

Abstract:
1. A method of creating a pilot channel in an opportunistic radio communications system having a frequency spectrum that includes a set of frequency bands and in which successive frames of a radio communications channel are divided into timeslots, the method being executed by an access unit and comprising: opportunistically selecting a free frequency band in the frequency spectrum to support the pilot channel on the basis of a state table of the frequency spectrum, wherein the state table is obtained by probing all the frequency bands of the frequency spectrum and includes for each frequency band information on a busy state of the frequency band; and transmitting on the selected free frequency band a beacon signal in at least one timeslot of successive frames of the pilot channel and probing the free frequency band in at least one timeslot different from the timeslot in which the beacon signal is transmitted.