Patent ID: 7746837

Claim:
A system for controlling overhear-based packet transmission over a Wireless Local Area Network (WLAN), the system comprising: at least one station for overhearing data of other stations, collecting/transmitting its own transmission data and data of the other stations if it is determined that a data transmission failure occurs, compensating for channel access opportunities of the other stations if it is determined that the transmission data of the at least one station is transmitted from the other stations; and an access point (AP) for communicating with the at least one station over the WLAN, and equally assigning the channel access opportunity to the at least one station, wherein the station compares its own reception (Rx) signal intensity with a reception (Rx) signal intensity of a transmission-failure station, determines whether a Rx signal strength of the station is higher than the Rx signal intensity of the transmission-failure station, determines whether a MAC Service Data Unit (MSDU) equal to a sum of the transmission data of the station and overhear data of the transmission-failure station is larger than a maximum MSDU, performs fragmentation of the MSDU if the Rx signal strength of the station is higher than the Rx signal intensity of the transmission-failure station and the MSDU is larger than the maximum MSDU, and transmits the fragmented MSDU several times.