Patent ID: 6597723
Filing Date: 2003-07-22
Classification: H04B,H04W

Abstract:
A method for controlling transmission power levels in a spread spectrum time division duplex communication system having frames with time slots for communication, the method comprising:transmitting a first communication having a transmission power level in a first time slot from a first communication station; receiving at a second communication station the first communication and measuring a power level of the first communication as received; determining a path loss estimate based on in part the measured received first communication power level and the first communication transmission power level; setting a transmission power level for a second communication in a second time slot from the second station to the first station based on in part combining the path loss estimate weighted by a first factor with a long term path loss estimate weighted by a second factor, wherein the first and second factors are a function of a time separation of the first and second time slots; and determining a quality, &agr; of the path loss estimate based on in part a number of time slots, D, between the first and second time slot; and wherein the first factor is &agr; and the second factor is 1âˆ’&agr;.