Patent ID: 8630230

Claim:
A method of reducing interference between two communication systems operating in adjacent frequency bands and coexisting in a communication device, the two communication systems including a first communication system using Time Division Duplex (TDD) and a second communication system which is contention-based, the method comprising: not performing using a device for communicating with two communication systems the arbitration procedure on a downlink subframe of the first communication system when a carrier to noise plus interference ratio (CINR) value of the first communication system is larger than a CINR threshold and a received signal strength indicator (RSSI) value of the second communication system is larger than a downlink RSSI threshold, performing the arbitration procedure on an uplink subframe of the first communication system when a transmit power of the first communication system is larger than a transmit power threshold and the RSSI value of the second communication system is smaller than an uplink RSSI threshold; and when the arbitration procedure on the downlink or uplink subframe is performed, determining whether to send a specific packet to request one or more stations not to send packets to the second communication system.