Method and Device for Open Loop Uplink Access Power Control
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Abstract
A method for open loop uplink access power control comprises: estimating the uplink transmission path loss according to received signal power of a station (STA) and the transmit power of a central access point (CAP); determining the transmission bandwidth allocated by the CAP for uplink transmission and deviation adjustment of the CAP; determining a modulation-coding mode and determining requirements of the carrier-to-noise ratio corresponding to the modulation-coding mode; and calculating a target value for adjusting the transmit power of the STA. Also disclosed is a device for open loop uplink access power control.
12 Citations
21 Claims
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1-12. -12. (canceled)
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13. A method for open loop uplink access power control, comprising:
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estimating an uplink transmission path loss according to a received signal power of a station (STA) and a transmit power of a central access point (CAP); determining a transmission bandwidth allocated by CAP for uplink transmission and deviation adjustment of CAP; determining a modulation-coding mode and determining requirements of a carrier-to-noise ratio corresponding to modulation-coding mode; and calculating a target value for adjusting transmit power of the STA by a formula;
PSTA=min {PSTA—
MAX, PLOL+C/N+10 log10(BW)+offsetCAP+offsetSTA}wherein, PSTA—
MAX is a maximum transmission power of said STA, PLOL is loss of uplink transmission path, C/N is the carrier-to-noise ratio corresponding to modulation and coding scheme, with respect to noise and interference on a receiving terminal, BW is a bandwidth distributed by access point CAP for the uplink transmission, offsetCAP is deviation adjustment of the CAP, and offsetSTA is an adjustment of the STA.- View Dependent Claims (14, 15, 16)
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17. A device of uplink transmission open loop power control, comprising:
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first calculating unit that calculates a target value of STA transmission power; first determining unit that determines CAP for uplink transmission allocation of transmission bandwidth; second determining unit that determines modulation and coding mode, and carrier-to-noise ratio corresponding to modulation and coding mode; third determining unit that determines deviation adjustment of the CAP; and second calculating unit that calculates a target value for adjusting transmit power of the STA by a formula;
PSTA=min {PSTA—
MAX, PLOL+C/N+10 log10(BW)+offsetCAP+offsetSTA}wherein, PSTA—
MAX is a maximum transmission power of the indicated STA, PLOL is loss of uplink transmission path, C/N is the carrier-to-noise ratio corresponding to modulation and coding scheme, and BW is a bandwidth distributed by access point CAP for the uplink transmission.- View Dependent Claims (18, 19, 20, 21)
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Specification