Patent ID: 7110717
Filing Date: 2006-09-19
Classification: H04B,H04W

Abstract:
1. In a relayed communication system having a hub and a plurality of subscriber terminals coupled for communication with one another via an elevated wireless relay operative in a bent pipe mode through a forward uplink path from the hub, a forward downlink path to the subscriber terminals, a return uplink path from the subscriber terminals, and a return downlink path to the hub, a method for transmit power level control at the subscriber terminals comprising: providing a calibrated transmit signal terminal operative as a leader terminal and having a leader uplink from the leader terminal and a leader downlink to the hub so that the leader terminal experiences a downlink propagation path that approximates all subscriber terminal downlink propagation paths; causing the leader terminal to calibrate its power level using power levels of its leader uplink and leader downlink; generating leader testing signals at the leader terminal via the leader uplink; generating subscriber testing signals at the subscriber terminals via the subscriber uplink; estimating leader terminal power level received at the hub; comparing the respective subscriber terminal power levels with the leader terminal power level to produce an error signal; and using the error signal to produce a control signal to control the transmit power level of the subscriber terminals.