Patent ID: 8289940

Claim:
A first device for wireless communication, the first device comprising: a first antenna system that provides directional transmission/reception at a first frequency within a first range; a second antenna system that provides omni-directional transmission/reception at a second frequency within a second range, the second frequency being lower than the first frequency, the second range being greater than the first range; and a medium access control (MAC) layer that uses the second antenna system to send a second wireless device a request for wireless data transmission via the first antenna system; and wherein the MAC layer: uses the second antenna system for receiving an approval for the wireless data transmission from the second wireless device, uses the second antenna system for transmitting an acknowledgment of the approval upon receiving the approval, uses the first antenna system to transmit one or more data packets to the second wireless device upon receiving the approval, and refrains from contending for data transmission based at least partly on the acknowledgement of the approval.