Patent ID: 7920885

Claim:
A method of wireless data communication, comprising: receiving a request for wireless communication between two wireless stations over a primary frequency channel; establishing a direct wireless communication link between the two stations over a secondary frequency channel; periodically transmitting a beacon on the primary channel to disseminate timing information about contention-free periods for transmission of data during scheduled slots; and performing wireless communication between the two stations via the direct communication link over the secondary frequency channel during the scheduled slots, wherein one or both of the two stations periodically broadcasting one or more NULL frames for fixed duration on the secondary frequency channel for preventing other stations from transmitting on the secondary channel, the one or more NULL frames and directional data are transmitted on the secondary frequency channel, and an access point (AP) or coordinator on the primary frequency channel transmits duplicates of the primary frequency channel beacon on the second frequency channel to prevent other stations from transmitting on the secondary frequency channel.