Patent ID: 8780882
Filing Date: 2014-07-15
Classification: H04W

Abstract:
1. A method for spectrum sharing among Wireless Regional Area Networks (WRAN) whose service areas overlap, the method comprising: providing a separate communication channel for use among base stations (BS), which is separate from WRAN frequency channels; synchronizing in time, starts of periodic Contention Windows on the separate communication channel; communicating during a Contention Window, on the separate communication channel, between the base stations of the WRANs which wish to reserve time for a temporary sole use of a WRAN frequency channel, messages regarding reserving times for the temporary sole use of the WRAN frequency channel by the base stations; determining, from among the base stations requesting the temporary sole use of the WRAN frequency channel, a winner BS and its respective WRAN cell that is to have the temporary sole use of the WRAN frequency channel using random numbers independently and respectively chosen, from a set with a uniform probability distribution, for each base station requesting the temporary sole use of the WRAN frequency channel; and assigning and transmitting to the winner BS an acquisition time at which the winner BS can begin temporary sole use of the WRAN frequency channel, and at which other BSs, whose service areas overlap with that of the winner BS, must cease using the WRAN frequency channel, wherein the winner BS is determined by choosing the BS with the highest respective random number, which each BS, including an occupier BS, independently generates during each Contention Window before the end of the Request Window, and which each contender BS transmits to the occupier BS in a ODSC_REQ message, and wherein the random numbers are integers in the range of 0 to 2