Patent ID: 8611287
Filing Date: 2013-12-17
Classification: H04W

Abstract:
1. A method for transmitting a Coexistence Beacon Protocol (CBP) packet of a specified base station in a Cognitive Radio (CR)-based system, wherein the specified base station is in a specified cell, the method comprising: determining a Self-Coexistence Window (SCW) slot occupied by each of one or more adjacent base stations by receiving a CBP packet from each of the adjacent base stations for a predetermined period, wherein each of the adjacent base stations is in a cell adjacent to the specified cell; selecting by the specified base station a SCW slot not occupied by an adjacent base station as the SCW slot for transmitting a CBP packet from the specified base station, wherein the CBP packet comprises a CBP identifier that identifies the CBP packet; transmitting the CBP packet to the adjacent base stations through the selected SCW slot; receiving a CBP identifier list for successfully received CBP packets from each of the adjacent base stations; and when the CBP identifier is included in the CBP identifier list received from each of the adjacent base stations, occupying the selected SCW slot.