Patent ID: 8547889
Filing Date: 2013-10-01
Classification: H04W

Abstract:
1. A method of exchanging messages at a transmitting device in a wireless network, the method comprising: transmitting a link recommendation request message to a receiving device, wherein the link recommendation request message is included in a first Medium Access Control (MAC) extension header of a data packet that includes user data to be transmitted to the receiving device from the transmitting device; and receiving an ACK packet from the receiving device in response to the data packet, the ACK packet comprising a second MAC extension header which includes transmit power control (TPC) information, wherein the TPC information to be used by the transmitting device to determine whether to change transmission power of the transmitting device, wherein the TPC information is determined based on a channel status for a channel on which the data packet is transmitted, and wherein the second MAC extension header comprises: an extension control field comprising control information; a type field indicating a type of data included in sub-packets constituting the ACK packet; a low-rate physical (LRP) antenna direction tracking (ADT) feedback field comprising ADT feedback information for obtaining an optimized transmission pattern during future signal transmission in an LRP unidirectional mode; an ACK group field comprising information indicating whether preceding sub-packets exist; and at least one of a clock field comprising clock count information of video data or a clock field comprising clock count information of audio data.