Reverse link power control in an orthogonal system
First Claim
Patent Images
1. A method of reverse link power control, comprising:
- transmitting a packet;
determining whether the packet has been received without error;
decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error;
increasing the effective C/I setpoint if the packet has not been received without error; and
regulating the transmit (TX) power based on a Received Power Over Thermal (RpOT) and the effective C/I setpoint.
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Abstract
A closed-loop reverse-link power control algorithm for a frequency hopping orthogonal frequency division multiple access (FH-OFDMA) system is described. The power control algorithm adjusts the user'"'"'s transmit power based on effective carrier-to-interference (C/I) and Received-Power-Over-Thermal (RpOT) measurements. The algorithm is inherently stable and is effective for FH-OFDMA systems with retransmissions.
51 Citations
25 Claims
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1. A method of reverse link power control, comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error; and regulating the transmit (TX) power based on a Received Power Over Thermal (RpOT) and the effective C/I setpoint. - View Dependent Claims (2, 3, 4, 5, 13)
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6. A method of reverse link power control, comprising:
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transmitting a packet; determining whether the racket has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error; and determining whether a Received Power Over Thermal (RpOT) is greater than a maximum Received Power Over Thermal (RpOTmax). - View Dependent Claims (7, 8, 9, 10, 11, 12)
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14. A method of reverse link power control, comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; and increasing the effective C/I setpoint if the packet has not been received without error, wherein the determining, decreasing and increasing steps comprise an outer loop power control, and wherein the outer loop power control is disabled if the Received Power Over Thermal (RpOT) is less than or equal to the minimum Received Power Over Thermal (RpOTmin).
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15. A method of reverse link power control, comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; and increasing the effective C/I setpoint if the packet has not been received without error, wherein the determining, decreasing and increasing steps comprise an outer loop power control, and wherein the outer loop power control is disabled if the Received Power Over Thermal (RpOT) is greater than or equal to the maximum Received Power Over Thermal RpOTmax.
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16. A method of reverse link power control, comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; and increasing the effective C/I setpoint if the packet has not been received without error, wherein the determining, decreasing and increasing steps comprise an outer loop power control, and wherein the outer loop power control is enabled if the Received Power Over Thermal (RpOT) is greater than the minimum Received Power Over Thermal (RpOTmin) and the Received Power Over Thermal (RpOT) is less than the maximum Received Power Over Thermal RpOTmax.
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17. A wireless communications device, comprising:
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means for transmitting a packet; means for determining whether the packet has been received without error; means for decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; means for increasing the effective C/I setpoint if the packet has not been received without error; and means for regulating the transmit (TX) power based on a Received Power Over Thermal (RpOT) and the effective C/I setpoint.
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18. A wireless communications device, comprising:
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means for transmitting a packet; means for determining whether the packet has been received without error; means for decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; means for increasing the effective C/I setpoint if the packet has not been received without error; and means for determining whether a Received Power Over Thermal (RpOT) is greater than a maximum Received Power Over Thermal (RpOTmax). - View Dependent Claims (19)
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20. A processor programmed to execute a method of estimating interference in a wireless communication system, the method comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error; and regulating the transmit (TX) power based on a Received Power Over Thermal (RpOT) and the effective C/I setpoint.
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21. A processor programmed to execute a method of estimating interference in a wireless communication system, the method comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error; and determining whether a Received Power Over Thermal (RpOT) is greater than a maximum Received Power Over Thermal (RpOTmax). - View Dependent Claims (22)
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23. A computer readable media embodying a method of reverse link power control, the method comprising:
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transmitting a packet; determining whether the packet has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error;
andregulating the transmit (TX) power based on a Received Power Over Thermal (RpOT) and the effective C/I setpoint.
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24. A computer readable media embodying a method of reverse link power control, the method comprising:
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transmitting a packet; determining whether the racket has been received without error; decreasing an effective carrier-to-interference (C/I) setpoint if the packet has been received without error; increasing the effective C/I setpoint if the packet has not been received without error; and determining whether a Received Power Over Thermal (RpOT) is greater than a maximum Received Power Over Thermal (RpOTmax). - View Dependent Claims (25)
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Specification