Patent ID: 8385259

Claim:
A method of operating a system of Wireless Regional Area Networks (WRANs) comprising: grouping of a fixed number, FN, of successive transmission frames into superframes; synchronization of a transmission of the superframes, wherein the synchronization of the transmission of the superframes occurs across frequency channels in use within the WRAN system; assigning to each frequency channel in use by the WRAN system of a unique number, determined by a formula [(channel number) mod FN], which designates for that channel an internal frame number within each superframe during which the channel shall use that specific internal frames's coexistence window, called a Coexistence Beacon Window (CBW), to transmit a coexistence beacon, with any WRAN in the WRAN system on a different channel operating only to receive during a transmission time of the coexistence beacon within the CBWs assigned to other channels; wherein a subdivision of the CBW to have a plurality of transmission slots, such a slotted CBW called a Slotted Coexistence Beaconing Window (SCBW).