Patent ID: 7804797

Claim:
A communication control device that controls the transmission power of a communication device, in an infrastructure mode wireless LAN system using CSMA/CA for access control to a wireless medium, and using adaptive modulation/demodulation operation for wireless transmission, comprising: BSS discovery means for determining, based on at least one of wireless information obtained by measurement of a wireless signal by an access point or stations which are nodes in a BSS, which is a communication group including an access point and a plurality of stations, or the wireless information reported to the access point or the stations, whether or not there is a neighboring BSS, which is a BBS having a plurality of nodes, in which sending of a wireless signal by the plurality of nodes influences the communication of the access point or the stations; and transmission power setting means for setting the transmission power of the access point and each of the stations based on the result of the determination by the BSS discovery means, wherein, if it is determined by the BSS discovery means that there is a neighboring BSS, when all the access points constituting the neighboring BBS have the control function of the transmission power, the transmission power setting means sets the transmission power between the access point and each of the stations in its own BSS, which is a BSS including the transmission power setting means, and repeatedly updates the transmission power which is set every time the defined condition is satisfied, and, if there is an access point in the neighboring BSS that does not control the transmission power and if there is no neighboring BSS, maximizes the transmission power.