System and method for managing available uplink transmit power
AssigneeSOMA Networks, Inc.
InventorsRamesh Mantha, Anthony Gerkis
Life of this patent
Estimating the term…
Abstract
A system and method of determining the maximum uplink transmit power of a subscriber station from a remote base station where the subscriber station reports incidents of foldback in its radio to the base station. When the base station receives the report, it reduces the maximum uplink transmit power of the subscriber station. After a period of time lapses without any reports of foldback occurring, the base station increases the maximum uplink transmit power of the subscriber station.
Claims16
A method of increasing the accuracy of a base station's estimate of additional uplink transmit power available for a subscriber station that has a radio that includes a power amplifier including foldback circuitry that monitors a current in said power amplifier indicative of actual uplink transmit power provided by said power amplifier to an antenna, said foldback circuitry operating to limit said monitored current to prevent said power amplifier from being driven over specification or being driven outside regulatory limits, said method comprising:
- maintaining at said base station an estimated value for allowable maximum uplink transmit power for said subscriber station;
- tracking at said subscriber station incidents of foldback, an incident of foldback occurring whenever said foldback circuitry operates to limit said monitored current to prevent said power amplifier from being driven over specification or being driven outside regulatory limits;
- transmitting a foldback event message from said subscriber station to said base station whenever incidents of foldback tracked at said subscriber station reach a predetermined threshold;
- decreasing said estimated value when said base station receives a foldback event message from said subscriber station;
- increasing said estimated value when a predetermined interval of time has lapsed without said base station receiving a further foldback event message from said subscriber station;
- and
- subtracting uplink transmit power reported by said subscriber station from said estimated value to estimate additional uplink transmit power currently available to said subscriber station, when an accurate estimate of said additional uplink transmit power is required.
A system for transmitting data comprising:
- a plurality of subscriber stations each having a radio that includes a power amplifier including foldback circuitry that monitors a current in said power amplifier indicative of actual uplink transmit power provided by said power amplifier to an antenna, said foldback circuitry operating to limit said monitored current to prevent said power amplifier from being driven over specification or being driven outside regulatory limits, and each operable to track incidents of foldback and to transmit a foldback event message whenever incidents of foldback tracked reach a predetermined threshold, an incident of foldback occurring whenever said foldback circuitry operates to limit said monitored current to prevent said power amplifier from being driven over specification or being driven outside regulatory limits;
- and
- a base station operable to receive foldback event messages and to maintain an estimated value for allowable maximum uplink transmit power for each said subscriber station, said base station decreasing said estimated value for a subscriber station when the base station receives a foldback event message from said subscriber station and increasing said estimated value for said subscriber station when a predetermined interval of time has lapsed without said base station receiving a further foldback event message from said subscriber station, said base station being configured to accurately estimate additional uplink transmit power currently available to said subscriber station by subtracting current transmit power reported by said subscriber station from said estimated value for said subscriber station.
Dependencies are inferred from the claim text.