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US 10,375,650 B2Granted
Combined open loop/closed loop method for controlling uplink power of a mobile station
AssigneeInterDigital Technology Corporation
InventorsSung-Hyuk Shin, Zinan Lin, Donald M. Grieco, Robert L. Olesen
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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).
Claims20
A method for controlling transmit power of a wireless transmit receive unit (WTRU) comprising:
- receiving signaling indicating an uplink (UL) resource assignment, a power control (PC) correction command and an assigned modulation coding set (MCS);
- determining a transmit power based on a combination of a power component corresponding to a bandwidth of the UL resource assignment, an open loop power control (PC) component, a closed loop PC component and a power offset, wherein the open loop PC component comprises a cell specific open loop PC nominal component and a pathloss compensation component based on a filtered pathloss estimate and a pathloss compensation factor, 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.
1 more element
A wireless transmit receive unit (WTRU) comprising circuitry, including a transmitter, a receiver, a processor and memory, configured to:
- 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 transmit power based on a combination of a power component corresponding to a bandwidth of the UL resource assignment, an open loop power control (PC) component, a closed loop PC component and a power offset, wherein the open loop PC component comprises a cell specific open loop PC nominal component and a pathloss compensation component based on a filtered pathloss estimate and a pathloss compensation factor, 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
- apply the transmit power.
1 more element
Dependencies are inferred from the claim text.