Instantaneous joint transmit power control and link adaptation for RTS/CTS based channel access

A method for open loop group transmit power control in a wireless system, comprising:

• transmitting a frame conveying transmit power information for the frame to any proximate station;
• a proximate station receiving the frame and determining the path gain based on measured signal strength of the received frame and on the transmit power information conveyed in the received frame;
• selecting path gains originating from a group of stations;
• determining a transmit power required to reach any of the selected path gains;
• selecting the minimum of a) the highest transmit power and b) allowed transmit power, wherein the allowed transmit power is determined by regulatory requirements and station transmit power capabilities;
• and
• assigning the selected transmit power to Clear To Send (CTS) messages.

A method for open loop group transmit power control in a wireless system, comprising the steps of:

• selecting, by a first station, at least one station within a group;
• transmitting a transmit power information request from a first station to the at least one selected stations;
• transmitting a transmit power response in a frame, the frame comprising transmit power information for the frame, to any proximate station from the at least one selected stations in orderly manner preventing collisions;
• receiving the frame and determining the path gain based on measured signal strength of the received frame and the transmit power information in the received frame;
• selecting path gains originating from the group;
• determining required transmit power to reach any of the selected path gains;
• selecting the minimum of a) the highest transmit power and b) allowed transmit power, wherein the allowed transmit power is determined by regulatory requirements and stations transmit power capabilities;
• and
• assigning the selected transmit power to Clear To Send (CTS) messages.

A method for interference mitigation based on open loop transmit power control enabling tighter medium reuse, comprising the steps of:

• conveying transmit power control information for every transmitted frame in the frame by any station transmitting;
• receiving the transmitted frames and determining a path gain based on measured signal strength of the received frames and transmit power information conveyed by the received frames;
• determining a maximum instantaneously allowed transmit power based on all overheard frames;
• and
• performing at least one of a) reducing transmit power, and b) reducing transmit power in combination with adjusting link rate to ensure that the maximum instantaneously allowed transmit power is not exceeded during any transmission attempt.