Patent EA-001633-B1 (EA)
Title: Pilot based transmit power control
Inventor: WILLENEGGER SERGE
IPC: H04W52/16
Filed: 1998-01-27
Abstract: 1. A method for performing transmit power control on a reverse link signal processed using code division multiple access techniques and transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitting at a pilot channel transmit power, comprising the steps of: measuring a receive energy of the pilot channel; generating a decrease command when said receive energy is greater than an energy threshold; and generating an increase command when said receive energy is less than said energy threshold. 2. The method as set forth in claim 1 wherein said increase command is for increasing the reverse link transmit power and said decrease command is for decreasing the reverse link transmit power. 3. The method as set forth in claim 1 further comprising the step of transmitting said increase command and said decrease command via a forward link signal 4. The method as set forth in claim 2 wherein the traffic channel is received at a set of power levels and a corresponding set of transmission rates. 5. A system for performing telecommunications comprising: a set of subscriber units for transmitting a set of reverse link signals having a pilot channel and a traffic channel; and a base station for receiving a reverse link signal from said set of reverse link signals, for measuring an energy level of said pilot channel, and for generating a power control command based on said energy level. 6. The system as set forth in claim 5 wherein each subscriber unit from said set of subscriber units comprise: means for generating said pilot channel; means for generating said traffic channel; and means for generating an amplitude adjust command. 7. The system as set forth in claim 5 wherein each base station from said set of base stations comprise: means for measuring said energy level of said traffic channel; and means for setting said power control command to increase if said energy is less than a threshold, and for setting said power control command to decrease if said energy is greater than said threshold. 8. The system of claim 6 wherein said means for generating said traffic channel is further for performing gain adjust on said traffic channel in response to transmission rate changes. 9. The system of claim 6 wherein said subscriber unit further comprises a power control means for adjusting a reverse link gain adjust command in response to changes in a forward link receive energy. 10. A system for receive processing a signal comprising: traffic channel processor for demodulating a traffic channel in said signal; pilot channel process for demodulating a pilot channel in said signal and for generating a received energy measurement based on said pilot channel; and power control system for generating a power control command base on said received energy measurement. 11. The system as set forth in claim 10 wherein said power control command is for requesting an adjustment selected from a set of adjustments comprised of an increase or a decrease. 12. The system as set forth in claim 11 wherein said adjustment is directed to said signal. 13. The system as set forth in claim 12 wherein said adjustment is directed to said traffic channel. 14. The system as set forth in claim 10 further comprising a transmit system for transmitting said power control command.