Patent ID: 7821976
Filing Date: 2010-10-26
Classification: H04W

Abstract:
1. A method of controlling transmission power of a transmitting terminal among a plurality of terminals for transmitting/receiving frames in a wireless communication system, the frames having a frame structure, the frame structure including a header field including transmission rate information and length information of data transmitted in a frame and including a data field containing the data, the method comprising: determining, at a physical (PHY) layer of the transmitting terminal, whether a resource is in use while preparing a frame for transmission based on the rate information and the length information of a header field received from one of the plurality of terminals; in response to determining the resource is in use, transmitting a busy message from the PHY layer to a Media Access Control (MAC) layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal; upon receiving the idle message, transmitting a header field including the rate information and the length information of the frame for transmission at a maximum transmission power level available to the transmitting terminal, when it is determined that the resource is not in use; and transmitting the data field of the frame for transmission at an optimum transmission power level, which is less than the maximum transmission power level of the transmitting terminal, to allow a receiving terminal to receive the transmitted data field.