Patent ID: 7957760
Filing Date: 2011-06-07
Classification: H04W

Abstract:
1. An apparatus for controlling the transmit power of a first data transceiver, comprising: ranging circuitry configured to determine the distance between said first data transceiver and a second or more such transceiver with which communication is to occur; lookup table relating distance between said transceivers to path loss used in computing an approximate path loss between said first and second or more transceivers, based on the distance between them; and power control circuitry configured to modify the transmit power level of said first transceiver in response to said path loss, so as to cause said transmit power of said first data transceiver so as to transmit at a modified power level substantially as low as possible while still enabling reliable data communication, said power control circuitry further configured to compute a figure of merit indicative of quality of the data received by said second or more data transceiver.