Patent ID: 8031691

Claim:
A wireless communication device for uncompressed video data, comprising: a receiver configured to receive a data packet during a reserved time slot or contention-free data period; and a transmitter configured to send an acknowledgment (ACK) frame during the slot or period via a low-rate channel upon receiving the data packet, the low-rate channel having a directional mode and an omni-directional mode, the ACK frame comprising: a physical layer preamble; a physical layer header including a plurality of bits indicative of the status of the data packet, and a payload field comprising: a bitmap including a plurality of bits, each bit being assigned to a respective one of antenna elements, and being indicative of whether the current status of the respective one of the antenna elements is different from the immediately previous status thereof; and a cyclic redundancy check (CRC) field, wherein the ACK frame includes neither information indicative of a source address nor information indicative of a destination address, and wherein the ACK frame does not include a media access control (MAC) header.