Power control for a wireless communication system utilizing orthogonal multiplexing
First Claim
1. A method of performing power control for a wireless terminal in a wireless communication system, comprising:
- adjusting transmit power for a first transmission sent on a first set of at least one frequency subband of a first channel by the wireless terminal to a serving base station designated to receive the first transmission, wherein the transmit power for the first transmission is adjusted to achieve a target received signal quality (SNR) for the first transmission at the serving base station; and
adjusting transmit power for a second transmission sent on a second set of at least one frequency subband of a second channel by the wireless terminal to the serving base station, wherein the transmit power for the second transmission is adjusted based on the transmit power for the first transmission and a transmit power delta.
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Accused Products
Abstract
Techniques for adjusting transmit power to mitigate both intra-sector interference to a serving base station and inter-sector interference to neighbor base stations are described. The amount of inter-sector interference that a terminal may cause may be roughly estimated based on the total interference observed by each neighbor base station, channel gains for the serving and neighbor base stations, and the current transmit power level. The transmit power may be decreased if high interference is observed by a neighbor base station and increased otherwise. The transmit power may be adjusted by a larger amount and/or more frequently if the terminal is located closer to the neighbor base station observing high interference and/or if the current transmit power level is higher, and vice versa. The intra-sector interference is maintained within an acceptable level by limiting a received SNR for the terminal to be within a range of allowable SNRs.
242 Citations
37 Claims
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1. A method of performing power control for a wireless terminal in a wireless communication system, comprising:
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adjusting transmit power for a first transmission sent on a first set of at least one frequency subband of a first channel by the wireless terminal to a serving base station designated to receive the first transmission, wherein the transmit power for the first transmission is adjusted to achieve a target received signal quality (SNR) for the first transmission at the serving base station; and adjusting transmit power for a second transmission sent on a second set of at least one frequency subband of a second channel by the wireless terminal to the serving base station, wherein the transmit power for the second transmission is adjusted based on the transmit power for the first transmission and a transmit power delta. - View Dependent Claims (2, 3, 4, 5, 6, 7, 37)
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8. A method of performing power control for a wireless terminal in a wireless communication system, comprising:
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obtaining a reference power level corresponding to a target received signal quality (SNR) for a first transmission at a serving base station designated to receive the first transmission from the wireless terminal on a first channel; setting transmit power for a second transmission from the wireless terminal on a second channel to the serving base station based on the reference power level and a transmit power delta; and adjusting the transmit power delta based on at least one parameter. - View Dependent Claims (9)
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10. An apparatus for performing power control for a wireless terminal in a wireless communication system, comprising:
an adjustment unit configured to adjust transmit power for a first transmission sent on a first set of at least one frequency subband of a first channel by the wireless terminal to a serving base station designated to receive the first transmission, wherein the transmit power for the first transmission is adjusted to achieve a target received signal quality (SNR) for the first transmission at the serving base station, and to adjust transmit power for a second transmission sent on a second set of at least one frequency subband of a second channel by the wireless terminal to the serving base station, wherein the transmit power for the second transmission is adjusted based on the transmit power for the first transmission and a transmit power delta. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus for performing power control for a wireless terminal in a wireless communication system, comprising:
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means for adjusting transmit power for a first transmission sent on a first set of at least one frequency subband of a first channel by the wireless terminal to a serving base station designated to receive the first transmission, wherein the transmit power for the first transmission is adjusted to achieve a target received signal quality (SNR) for the first transmission at the serving base station; and means for adjusting transmit power for a second transmission sent on a second set of at least one frequency subband of a second channel by the wireless terminal to the serving base station, wherein the transmit power for the second transmission is adjusted based on the transmit power for the first transmission and a transmit power delta. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A non-transitory computer-readable medium comprising code, which, when executed by a machine, causes the machine to perform operations for power control for a wireless terminal in a wireless communication system, the computer-readable medium comprising:
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code for adjusting transmit power for a first transmission sent on a first set of at least one frequency subband of a first channel by the wireless terminal to a serving base station designated to receive the first transmission, wherein the transmit power for the first transmission is adjusted to achieve a target received signal quality (SNR) for the first transmission at the serving base station; and code for adjusting transmit power for a second transmission sent on a second set of at least one frequency subband of a second channel by the wireless terminal to the serving base station, wherein the transmit power for the second transmission is adjusted based on the transmit power for the first transmission and a transmit power delta. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. An apparatus for performing power control for a wireless terminal in a wireless communication system, comprising:
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a processor configured to obtain a reference power level corresponding to a target received signal quality (SNR) for a first transmission at a serving base station designated to receive the first transmission from the wireless terminal on a first channel; a processor configured to set transmit power for a second transmission from the wireless terminal on a second channel to the serving base station based on the reference power level and a transmit power delta; and an adjustment unit configured to adjust the transmit power delta based on at least one parameter. - View Dependent Claims (32)
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33. An apparatus for performing power control for a wireless terminal in a wireless communication system, comprising:
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means for obtaining a reference power level corresponding to a target received signal quality (SNR) for a first transmission at a serving base station designated to receive the first transmission from the wireless terminal on a first channel; means for setting transmit power for a second transmission from the wireless terminal on a second channel to the serving base station based on the reference power level and a transmit power delta; and means for adjusting the transmit power delta based on at least one parameter. - View Dependent Claims (34)
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35. A non-transitory computer-readable medium comprising code, which, when executed by a machine, causes the machine to perform operations for power control for a wireless terminal in a wireless communication system, the computer-readable medium comprising:
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code for obtaining a reference power level corresponding to a target received signal quality (SNR) for a first transmission at a serving base station designated to receive the first transmission from the wireless terminal on a first channel; code for setting transmit power for a second transmission from the wireless terminal on a second channel to the serving base station based on the reference power level and a transmit power delta; and code for adjusting the transmit power delta based on at least one parameter. - View Dependent Claims (36)
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Specification