Combined open loop/closed loop method for controlling uplink power of a mobile station
First Claim
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1. A method implemented by an eNode-B, the method comprising:
- transmitting, to a wireless transmit/receive unit (WTRU) via higher layer signaling, open loop uplink (UL) power control (PC) parameters including a cell-specific parameter and a WTRU-specific parameter;
transmitting a PC correction command; and
receiving, from the WTRU, a transmission having an applied transmit power, wherein;
the transmission comprises a number of resource blocks;
the applied transmit power is based on a transmit power spectral density and the number of resource blocks;
the transmit power spectral density comprises a combination of an open loop UL PC component, a closed loop PC component and a delta factor related to an offset value;
the offset value is related to a modulation coding set (MCS);
the open loop UL PC component is based on pathloss, the cell-specific parameter and the WTRU-specific parameter;
the closed loop PC component includes a correction factor; and
the correction factor is based on the PC correction command.
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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
26 Claims
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1. A method implemented by an eNode-B, the method comprising:
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transmitting, to a wireless transmit/receive unit (WTRU) via higher layer signaling, open loop uplink (UL) power control (PC) parameters including a cell-specific parameter and a WTRU-specific parameter; transmitting a PC correction command; and receiving, from the WTRU, a transmission having an applied transmit power, wherein; the transmission comprises a number of resource blocks; the applied transmit power is based on a transmit power spectral density and the number of resource blocks; the transmit power spectral density comprises a combination of an open loop UL PC component, a closed loop PC component and a delta factor related to an offset value; the offset value is related to a modulation coding set (MCS); the open loop UL PC component is based on pathloss, the cell-specific parameter and the WTRU-specific parameter; the closed loop PC component includes a correction factor; and the correction factor is based on the PC correction command. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An eNode-B comprising:
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a transmitter configured to; transmit, to a wireless transmit/receive unit (WTRU) via higher layer signaling, open loop uplink (UL) power control (PC) parameters including a cell-specific parameter and a WTRU-specific parameter; and transmit a PC correction command; and a receiver configured to receive, from the WTRU, a transmission having an applied transmit power, wherein; the transmission comprises a number of resource blocks; the applied transmit power is based on a transmit power spectral density and the number of resource blocks; the transmit power spectral density comprises a combination of an open loop UL PC component, a closed loop PC component and a delta factor related to an offset value; the offset value is related to a modulation coding set (MCS); the open loop UL PC component is based on pathloss, the cell-specific parameter and the WTRU-specific parameter; the closed loop PC component includes a correction factor; and the correction factor is based on the PC correction command. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for controlling transmit power of a wireless transmit receive unit (WTRU) comprising:
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determining a transmit power spectral density, wherein; the transmit power spectral density comprises a combination of an open loop uplink (UL) power control (PC) component, a closed loop PC component and a delta factor related to an offset value; the open loop UL PC component is based on pathloss and open loop UL PC parameters including a cell-specific parameter and a WTRU-specific parameter provided from higher layers; the closed loop PC component includes a correction factor; the correction factor is based on a PC correction command signaled in a UL grant associated with a hybrid automatic repeat request (HARQ) process; and the offset value is related to an assigned modulation coding set (MCS) signaled in the UL grant; determining a transmit power based on the determined transmit power spectral density and a number of assigned resource blocks; and applying the transmit power in accordance with a timing of the HARQ process. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A wireless transmit receive unit (WTRU) comprising a processor, wherein the processor is configured to:
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determine a transmit power spectral density, wherein; the transmit power spectral density comprises a combination of an open loop uplink (UL) power control (PC) component, a closed loop PC component and a delta factor related to an offset value; the open loop UL PC component is based on pathloss and open loop UL PC parameters including a cell-specific parameter and a WTRU-specific parameter provided from higher layers; the closed loop PC component includes a correction factor; the correction factor is based on a PC correction command signaled in a UL grant associated with a hybrid automatic repeat request (HARQ) process; and the offset value is related to an assigned modulation coding set (MCS) signaled in the UL grant; determine a transmit power based on the determined transmit power spectral density and a number of assigned resource blocks; and apply the transmit power in accordance with a timing of the HARQ process. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification