Abstract
Methods 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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4G | 31/12/2019 | ISLD-201912-087 | INTERDIGITAL INC |
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5G | 30/09/2021 | ISLD-202109-030 | INTERDIGITAL INC | No | Family Member |
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Claim
1. A method for power scaling in a wireless transmit/receive unit (WTRU) configured for operation on multiple carriers comprising:
selecting a carrier from the multiple carriers in response to the WTRU having exceeded a predetermined value, wherein the predetermined value is a maximum allowed transmit power for the WTRU, wherein each carrier has a plurality of channels, wherein the selected carrier from the multiple carriers is associated with an Enhanced Dedicated Channel (E-DCH) and the selected carrier is a carrier having a highest Dedicated Physical Control Channel (DPCCH) power of the multiple carriers; and
applying power scaling to any E-DCH Dedicated Physical Data Channels (E-DPDCHs) in the selected carrier; and
on a condition that the power scaling in the selected carrier is applied and in response to the WTRU still having exceeded the predetermined value, applying power scaling on other carriers of the multiple carriers based on DPCCH power levels of the other carriers; and
on a condition that the power scaling in the other carriers is applied and in response to the WTRU still having exceed the predetermined value, applying further power scaling to at least one of the multiple carriers such that a power ratio between the DPCCH and other control channels of the at least one carrier is maintained and a power ratio between the DPCCH and any E-DPDCHs of the at least one carrier is maintained.
2. The method of claim 1, wherein the power scaling includes reducing all gain factors values on the selected carrier.
3. The method of claim 1, wherein the power scaling is applied until a transmit power of the at least one E-DPDCH in the selected carrier reaches a value that is signaled to the WTRU using higher layer signaling.
4. The method of claim 1, wherein the power scaling is applied until a gain factor value for the at least one E-DPDCH in the selected carrier reaches a value that is signaled to the WTRU using higher layer signaling.
5. The method of claim 1, further comprising:
iteratively selecting at least one other carrier on a condition that a gain factor has been reached for the at least one E-DPDCH in the selected carrier and the maximum allowed transmit power of the WTRU is exceeded; and
iteratively applying power scaling to the at least one E-DPDCH in the other selected carrier until the maximum allowed transmit power is not exceeded.
6. The method of claim 1, wherein the maximum allowed transmit power of the WTRU is determined after applying Dedicated Physical Control Channel (DPCCH) power adjustments and gain factors.
7. A wireless transmit/receive unit (WTRU) using power scaling for multiple carriers, comprising:
a transceiver configured to transmit and receive the multiple carriers; and
a processor, coupled to the transceiver, configured to select a carrier from the multiple carriers in response to the WTRU having exceeded a predetermined value, wherein the predetermined value is a maximum allowed transmit power for the WTRU, wherein each carrier has a plurality of channels, wherein the selected carrier from the multiple carriers is associated with an Enhanced Dedicated Channel (E-DCH) and the selected carrier is a carrier having a highest Dedicated Physical Control Channel (DPCCH) power of the multiple carriers; and
the processor further configured to apply power scaling to any E-DCH Dedicated Physical Data Channels (E-DPDCHs) in the selected carrier; and
on a condition that the power scaling in the selected carrier is applied and in response to the WTRU still having exceeded the predetermined value, the processor further configured to apply power scaling on other carriers of the multiple carriers based on DPCCH power levels of the other carriers; and
on a condition that the power scaling in the other carriers is applied and in response to the WTRU still having exceed the predetermined value, the processor further configured to apply further power scaling to at least one of the multiple carriers such that a power ratio between the DPCCH and other control channels of the at least one carrier is maintained and a power ratio between the DPCCH and any E-DPDCHs of the at least one carrier is maintained.
8. The WTRU of claim 7, further comprising:
the processor configured to iteratively selecting at least one other carrier on a condition that a gain factor has been reached for the at least one E-DPDCH in the selected carrier and the maximum allowed transmit power of the WTRU is exceeded; and
the processor being further configured to iteratively apply power scaling to at least one E-DPDCH in the other selected carrier until the maximum allowed transmit power is not exceeded.
9. The WTRU of claim 7, wherein the power scaling includes reducing all gain factors values on the selected carrier.
10. The WTRU of claim 7, wherein the power scaling is applied until a transmit power of the at least one E-DPDCH in the selected carrier reaches a value that is signaled to the WTRU using higher layer signaling.
11. The WTRU of claim 7, wherein the power scaling is applied until a gain factor value for the at least one E-DPDCH in the selected carrier reaches a value that is signaled to the WTRU using higher layer signaling.
12. The WTRU of claim 7, wherein the maximum allowed transmit power of the WTRU is determined after applying Dedicated Physical Control Channel (DPCCH) power adjustments and gain factors.
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