Combined open loop/closed loop method for controlling uplink power of a mobile station
First Claim
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1. A method for controlling transmit power of a wireless transmit/receive unit (WTRU), the method comprising:
- receiving signaling indicating an uplink (UL) resource assignment, a power control (PC) correction command, an assigned modulation coding set (MCS) and a cell-specific pathloss compensation factor;
determining a filtered pathloss estimate;
determining a pathloss compensation component as a function of the filtered pathloss estimate and the cell specific pathloss compensation factor;
determining a transmit power based on a combination of a power component corresponding to a bandwidth of the UL resource assignment, an open loop PC component, a closed loop PC component and a power offset, wherein the open loop PC component comprises the pathloss compensation component and a cell specific open loop PC nominal component, wherein the closed loop PC component comprises a correction factor, wherein the correction factor is based on the PC correction command, and wherein the power offset is related to the assigned MCS; and
applying the transmit power.
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Abstract
A method and apparatus are disclosed comprising a combined open loop/closed loop uplink power control scheme for E-UTRA. The combined open and closed loop method for UL intra-cell PC controls the wireless transmit receive unit (WTRU) transmit power spectral density (PSD), PSDTx, (e.g. power per RB).
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Citations
20 Claims
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1. A method for controlling transmit power of a wireless transmit/receive unit (WTRU), the method comprising:
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receiving signaling indicating an uplink (UL) resource assignment, a power control (PC) correction command, an assigned modulation coding set (MCS) and a cell-specific pathloss compensation factor; determining a filtered pathloss estimate; determining a pathloss compensation component as a function of the filtered pathloss estimate and the cell specific pathloss compensation factor; determining a transmit power based on a combination of a power component corresponding to a bandwidth of the UL resource assignment, an open loop PC component, a closed loop PC component and a power offset, wherein the open loop PC component comprises the pathloss compensation component and a cell specific open loop PC nominal component, wherein the closed loop PC component comprises a correction factor, wherein the correction factor is based on the PC correction command, and wherein the power offset is related to the assigned MCS; and applying the transmit power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless transmit/receive unit (WTRU) comprising a processor, wherein the processor is configured to:
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receive signaling indicating an uplink (UL) resource assignment, a power control (PC) correction command, an assigned modulation coding set (MCS) and a cell-specific pathloss compensation factor; determine a filtered pathloss estimate; determine a pathloss compensation component as a function of the filtered pathloss estimate and the cell specific pathloss compensation factor; determine a transmit power based on a combination of a power component corresponding to a bandwidth of the UL resource assignment, an open loop PC component, a closed loop PC component and a power offset, wherein the open loop PC component comprises the pathloss compensation component and a cell specific open loop PC nominal component, wherein the closed loop PC component comprises a correction factor, wherein the correction factor is based on the PC correction command, and wherein the power offset value is related to the assigned MCS; and apply the transmit power. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification