Systems and methods for efficiently transmitting power level information in a point to multipoint wireless system. Multiple subscriber units may transmit indications of their power level within a shared burst where one or more subchannels are allocated to each subscriber unit. The burst holding the power...http://www.google.es/patents/US6795426?utm_source=gb-gplus-sharePatente US6795426 - Realtime power control in OFDM systems
