Abstract
Method and apparatus for power scaling for multi-carrier wireless terminals are disclosed. Methods and mechanisms are provided for power scaling when a multi-carrier WTRU reaches its maximum output power.
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
Services
Claim
1. A method for power scaling in a wireless transmit/receive unit (WTRU) configured for operation on multiple frequencies, comprising:
selecting a frequency based on a power metric for a WTRU having a total WTRU transmit power exceeding a predetermined value; and
applying power scaling with respect to a selected frequency to at least meet the predetermined value.', 'selecting a frequency based on a power metric for a WTRU having a total WTRU transmit power exceeding a predetermined value; and', 'applying power scaling with respect to a selected frequency to at least meet the predetermined value.
2. The WTRU of claim 1 wherein a physical uplink control channel, PUCCH, is transmitted on the first uplink carrier.
2. The method of claim 1, wherein power scaling is applied to a channel in the selected frequency.
3. The WTRU of claim 2 wherein a transmission power level of the PUCCH is not scaled on a condition that the uplink maximum transmission power level will be exceeded by the total WTRU transmit power.
3. The method of claim 1, wherein the power metric is a power level of a control channel.
4. The method of claim 1, wherein the selected frequency is associated with a control channel having the highest transmit power.
4. The WTRU of claim 1 wherein the first uplink carrier is an anchor carrier and the other uplink carriers are supplemental carriers.
5. The WTRU of claim 1 wherein the processor is further configured on a condition that the maximum transmission power level will be exceeded by the total WTRU transmit power after scaling the other uplink carriers, the first uplink carrier has its transmission power level scaled.
6. The method of claim 5, wherein multiple data channels are power scaled equally.
6. A method for use in a wireless/transmit receive unit, WTRU, the method comprising:
determining transmission power levels for a plurality of uplink carriers, wherein the plurality of uplink carriers includes a first uplink carrier, wherein the first uplink carrier includes uplink control information, wherein on a condition that an uplink maximum transmission power level is exceeded by a total WTRU transmit power, scaling, with a same scaling factor, other uplink carriers of the plurality of uplink carriers, and not scaling the first uplink carrier, wherein the uplink maximum transmission power level is a maximum power limit for the WTRU; and
transmitting a physical uplink shared channel, PUSCH, transmission on each of the other uplink carriers at the scaled transmission power levels and transmitting a PUSCH transmission on the first uplink carrier at an unsealed transmission power level.', 'determining transmission power levels for a plurality of uplink carriers, wherein the plurality of uplink carriers includes a first uplink carrier, wherein the first uplink carrier includes uplink control information, wherein on a condition that an uplink maximum transmission power level is exceeded by a total WTRU transmit power, scaling, with a same scaling factor, other uplink carriers of the plurality of uplink carriers, and not scaling the first uplink carrier, wherein the uplink maximum transmission power level is a maximum power limit for the WTRU; and', 'transmitting a physical uplink shared channel, PUSCH, transmission on each of the other uplink carriers at the scaled transmission power levels and transmitting a PUSCH transmission on the first uplink carrier at an unsealed transmission power level.
7. The method of claim 1, wherein the power scaling is applied until a minimum transmit power has been reached.
7. The method of claim 6 wherein a physical uplink control channel, PUCCH, is transmitted on the first uplink carrier.
8. The method of claim 1, wherein the power scaling is applied until a minimum gain factor value has been reached.
8. The method of claim 7 wherein a transmission power level of the PUCCH is not scaled on a condition that the uplink maximum transmission power level will be exceeded by the total WTRU transmit power.
9. The method of claim 1, further comprising:
iteratively selecting at least another frequency on a condition that a minimum gain factor has been reached and the total WTRU transmit power still exceeds the maximum power value; and
iteratively applying power scaling to the at least another frequency until the total WTRU transmit power at least meets the maximum allowable value without reaching the minimum gain factor.', 'iteratively selecting at least another frequency on a condition that a minimum gain factor has been reached and the total WTRU transmit power still exceeds the maximum power value; and', 'iteratively applying power scaling to the at least another frequency until the total WTRU transmit power at least meets the maximum allowable value without reaching the minimum gain factor
9. The method of claim 6 wherein the first uplink carrier is an anchor carrier and the other uplink carriers are supplemental carriers
10. The method of claim 6 further comprising, on a condition that the maximum transmission power level will be exceeded by the total WTRU transmit power after scaling the other uplink carriers, scaling transmission power level of the first uplink carrier.']
10. The method of claim 9, further comprising:
performing additional scaling on all channels on a condition that the minimum gain factor has been reached for all channels and the total WTRU transmit power still exceeds a maximum allowable value
11. The method of claim 9, further comprising:
performing additional scaling on all frequencies on a condition that the minimum gain factor has been reached for all frequencies and the total WTRU transmit power still exceeds a maximum allowable value
12. The method of claim 9, wherein a power ratio for control channels associated with the frequency and the at least another frequency remain unchanged
13. The method of claim 9, wherein a power ratio for a control channel and data channel associated with each of the frequency and the at least another frequency is maintained
14. The method of claim 1, wherein the total WTRU transmit power is determined after applying Dedicated Physical Control Channel (DPCCH) power adjustments and gain factors
15. The method of claim 2, wherein the channel is an Enhanced Dedicated Channel (E-DCH) Dedicated Physical Data Channel (E-DPDCH)
16. The method of claim 2, wherein the power scaling is applied until the channel minimum power has been reached
17. The method of claim 1, wherein power scaling is applied by reducing data channel gain factors.1. A wireless transmit/receive unit, WTRU, comprising:
a processor configured to determine transmission power levels for a plurality of uplink carriers, wherein the plurality of uplink carriers includes a first uplink carrier, wherein the first uplink carrier includes uplink control information, wherein on a condition that an uplink maximum transmission power level is exceeded by a total WTRU transmit power, scaling, with a same scaling factor, other uplink carriers of the plurality of uplink carriers, and not scaling the first uplink carrier, wherein the uplink maximum transmission power level is a maximum power limit for the WTRU; and
a transmitter configured to transmit a physical uplink shared channel, PUSCH, transmission on each of the other uplink carriers at the scaled transmission power levels and to transmit a PUSCH transmission on the first uplink carrier at an unsealed transmission power level.', 'a processor configured to determine transmission power levels for a plurality of uplink carriers, wherein the plurality of uplink carriers includes a first uplink carrier, wherein the first uplink carrier includes uplink control information, wherein on a condition that an uplink maximum transmission power level is exceeded by a total WTRU transmit power, scaling, with a same scaling factor, other uplink carriers of the plurality of uplink carriers, and not scaling the first uplink carrier, wherein the uplink maximum transmission power level is a maximum power limit for the WTRU; and', 'a transmitter configured to transmit a physical uplink shared channel, PUSCH, transmission on each of the other uplink carriers at the scaled transmission power levels and to transmit a PUSCH transmission on the first uplink carrier at an unsealed transmission power level.
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