Abstract
Techniques for transmit power control for multiple antenna transmissions in an uplink are disclosed. A wireless transmit/receive unit (WTRU) generates at least one input stream for transmission and applies a gain factor to each channel. The gain factor is determined based on a reference channel power estimate. The WTRU generates at least two data streams from the input stream for transmission via a plurality of antennas and applies weights to the data streams. The gain factor and/or the weights are controlled such that a transmit power on each antenna is within a maximum allowed value. The WTRU may perform power scaling on a condition that a transmit power on any antenna exceeds the maximum allowed value. The WTRU may scale down an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) first before other channels. For multiple E-DCH streams the WTRU may calculate an E-DPDCH power offset based on an additional power offset factor due to multiple stream transmission.
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3G | 31/10/2011 | ISLD-201109-010 | INTERDIGITAL INC |
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No | Family Member | |||
3G | 22/12/2016 | ISLD-201706-015 | INTERDIGITAL INC |
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4G | 22/12/2016 | ISLD-201706-015 | INTERDIGITAL INC |
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Not Available | 22/12/2016 | ISLD-201706-015 | INTERDIGITAL INC |
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5G | 08/11/2019 | ISLD-201910-015 | INTERDIGITAL INC | No | Family Member |
Specification Information
Specification Information
Technologies
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US2011105174A1 | 3G | 31/10/2011 | ISLD-201109-010 | INTERDIGITAL INC |
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Technologies
Power Control
Product
Use Cases
Services
Claim
1. A wireless transmit/receive unit (WTRU) comprising:
circuitry configured to receive configuration information from a cellular network;
the circuitry is further configured to derive a first hybrid automatic repeat request (HARQ) offset value for single codeword transmission and a second HARQ offset value for multiple codeword transmission from the received configuration information;
the circuitry is further configured to receive a signal from the cellular network; wherein the signal indicates whether the WTRU is to transmit a single codeword or multiple codewords; and
the circuitry is further configured in response to the signal and on a condition that HARQ information is to be sent, to process bits of a single codeword based on the first HARQ offset value or process bits of multiple codewords based on the second HARQ offset value.
2. The WTRU of claim 1 wherein on a condition that the WTRU is to transmit multiple codewords and the transmission power level is greater than a maximum power level, the equal power scaling is applied to each antenna so that the transmission power level does not exceed the maximum.
3. The WTRU of claim 1 wherein the circuitry is further configured to receive power control commands and same power control commands are accumulated to determine a transmission power level for single codeword and multiple codeword transmission; wherein the same power control commands are used to determine the transmission power level for each of the multiple codewords.
4. The WTRU of claim 1 wherein the circuitry is configured to use a single power control loop for both single codeword transmission and multiple codeword transmission.
5. A method comprising:
receiving, by a wireless transmit/receive unit (WTRU), configuration information from a cellular network;
deriving, by the WTRU, a first HARQ offset value for single codeword transmission and a second hybrid automatic repeat request (HARQ) offset value for multiple codeword transmission from the received configuration information;
receiving, by the WTRU, a signal from the cellular network; wherein the signal indicates whether the WTRU is to transmit a single codeword or multiple codewords; and
in response to the signal and on a condition that HARQ information is to be sent, processing, by the WTRU, bits of a single codeword based on the first HARQ offset value or process bits of multiple codewords based on the second HARQ offset value.
6. The method of claim 5 further comprising on a condition that the WTRU is to transmit multiple codewords and the transmission power level is greater than a maximum power level, applying, by the WTRU, equal power scaling to each antenna so that the transmission power level does not exceed the maximum.
7. The method of claim 5 further comprising receiving power control commands; wherein same power control commands are accumulated to determine a transmission power level for single codeword and multiple codeword transmission; wherein the same power control commands are used to determine the transmission power level for each of the multiple codewords.
8. The method of claim 5 further comprising using a single power control loop for both single codeword transmission and multiple codeword transmission.
9. A wireless network node comprising:
circuitry configured to transmit configuration information to a wireless transmit/receive unit (WTRU); wherein based on the configuration information, the WTRU can derive a first hybrid automatic repeat request (HARQ) offset value for single codeword transmission and a second HARQ offset value for multiple codeword transmission;
the circuitry is further configured to transmit a signal to the WTRU; wherein the signal indicates whether the WTRU is to transmit a single codeword or multiple codewords; and
the circuitry is further configured in response to the signal and on a condition that HARQ information is received, to receive a signal from the WTRU having bits processed for a single codeword based on the first HARQ offset value or bits processed for multiple codewords based on the second HARQ offset value.
10. The wireless network node of claim 9 wherein the circuitry is further configured to use a single power control loop for both single codeword transmission and multiple codeword transmission.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.