Methods and apparatus for communicating and/or using transmission power information
First Claim
1. A method of operating a wireless terminal to provide transmission power information to a base station, the method comprising:
- generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said power report;
operating a transmitter to transmit the power report; and
repeating said steps of generating and operating according to a report transmission schedule;
wherein said power report is a report indicating a dB value; and
wherein generating said report includes performing a subtraction operation, said subtraction operation including subtracting a tone transmission power of an uplink dedicated control channel, in dBm, from a maximum transmission power value of said wireless terminal in dBm.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless terminal determines the transmission power used for its dedicated control channel at a point in time, and generates a power report indicating a ratio of a maximum wireless terminal transmit power to the transmit power of the dedicated control channel at the point in time. The power report provides a measure of available transmit power for wireless terminal use for other purposes, e.g., uplink traffic channels, after taking into consideration the transmit power used for the dedicated control channel. The point in time has a known time offset from the start of a communications segment in which the power report is transmitted. This allows the base station receiving dedicated control channel uplink signals from the wireless terminal to measure the received signals, receive and process the communicated power report, and correlate information to be used for accurate wireless terminal closed loop power control.
365 Citations
18 Claims
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1. A method of operating a wireless terminal to provide transmission power information to a base station, the method comprising:
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generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said power report; operating a transmitter to transmit the power report; and repeating said steps of generating and operating according to a report transmission schedule; wherein said power report is a report indicating a dB value; and wherein generating said report includes performing a subtraction operation, said subtraction operation including subtracting a tone transmission power of an uplink dedicated control channel, in dBm, from a maximum transmission power value of said wireless terminal in dBm.
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2. A wireless terminal, comprising:
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a report generation module for generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said power report; a transmitter for transmitting the power report; stored transmission schedule information for use in controlling the transmission of reports generated by said report generation module; and stored time offset information indicating a time offset between the point in time to which a generated power report corresponds and a start of a communications segment in which said report is to be transmitted; wherein said power report is a backoff report indicating a dB value; and wherein said report generation module includes a computation submodule for subtracting a per transmission power of an uplink dedicated control channel, in dBm, from a maximum transmission power value of said wireless terminal in dBm.
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3. A method of operating a wireless terminal to provide transmission power information to a base station, the method comprising:
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generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said report, said generating including subtracting a transmission power of an uplink dedicated control channel from a maximum transmission power value of said wireless terminal;
transmitting the power report; andrepeating said steps of generating and operating a transmitter to transmit according to a report transmission schedule. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A wireless terminal, comprising:
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a report generation module for generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said report, said report generation module performing a computation including subtracting a transmission power of an uplink dedicated control channel from a maximum transmission power value of said wireless terminal; a transmitter for transmitting the power report to a base station; storing transmission schedule information for use in controlling the transmission of reports generated by said report generation module according to a report transmission schedule. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A wireless terminal, comprising:
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means for generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said report, said means for generating performing a computation that includes subtracting a transmission power of an uplink dedicated control channel from a maximum transmission power value of said wireless terminal;
means for transmitting the power report; andmeans for repeating said steps of generating and operating a transmitter to transmit according to a report transmission schedule.
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18. A non-transitory computer readable medium embodying computer executable instructions, for use in a wireless terminal, said computer readable medium comprising instructions for causing a processor to perform the steps of:
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generating a power report indicating a ratio of a maximum transmit power of said wireless terminal to the transmit power of a reference signal having a power level known to said wireless terminal at a point in time corresponding to said report and subtracting a transmission power of an uplink dedicated control channel from a maximum transmission power value of said wireless terminal; transmitting the power report; and repeating said steps of generating and operating a transmitter to transmit according to a report transmission schedule.
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Specification