Transmit Power Control

Transmit Power Control is a technical mechanism used within some wireless networking devices in order to prevent too much unwanted interference between different wireless networks (e.g. the own network and the neigbours network). The network devices supporting this feature are WLAN devices in the 5GHz band compliant to the IEEE 802.11a. The idea of the mechanism is to reduce automatically the used transmission output power when other networks are within range. Reduced power means reduced interference problems. The power level of a single device can be reduced by 6dB which should result in an accumulated power level (the sum of radiated power of all devices currently transmitting) of at least 3dB (which is half of the power).