Maximum power reduction for non-contiguous allocation

1. A method comprising:

receiving, at a remote unit in a wireless communication system, a non-contiguous resource allocation;

calculating a fraction of resource blocks punctured from a smallest containing contiguous allocation (“SCCA”), wherein the SCCA is a smallest set of contiguous resource blocks that encompasses the non-contiguous resource allocation;

determining a first maximum power reduction for the non-contiguous resource allocation in response to the fraction of punctured resource blocks being less than a threshold value; and

transmitting uplink signals on the non-contiguous resource allocation using the first maximum power reduction in response to the fraction of punctured resource blocks being less than the threshold value.

2. The method of claim 1 , wherein the non-contiguous resource allocation comprises a plurality of smaller contiguous resource allocations.

3. The method of claim 1 , wherein determining the first maximum power reduction for the non-contiguous resource allocation comprises:

selecting a maximum power reduction defined for the SCCA as the MPR for the entire non-contiguous resource allocation in response to the fraction of resource blocks punctured from the SCCA being less than the threshold value; and

wherein no maximum power reduction is defined for the non-contiguous resource allocation in response to the fraction of resource blocks punctured from the SCCA not being less than the threshold value.

4. The method of claim 1 , wherein determining the first maximum power reduction for the non-contiguous resource allocation comprises increasing a selected maximum power reduction for the SCCA by a value β.

5. The method of claim 4 , wherein the value β is a function of the fraction of resource blocks punctured from the SCCA.

6. The method of claim 5 , wherein the value β is the negative of 10 times the base 10 logarithm of the fraction of resource blocks punctured from the SCCA.

7. The method of claim 1 , further comprising receiving an indication of an additional maximum power reduction from the wireless communication system, wherein transmitting uplink signals on the non-contiguous resource allocation using the first maximum power reduction comprises increasing the indicated maximum power reduction by the first maximum power reduction.

8. The method of claim 1 , wherein the threshold value is based on at least one of: a lowest resource block index of the allocation and a number of resource blocks in the SCCA.

9. The method of claim 1 , wherein the threshold value is based on at least one of: a center frequency of a carrier to which the non-contiguous resource allocation belongs, and a modulation of the non-contiguous resource allocation.

10. The method of claim 1 , wherein transmitting uplink signals on the non-contiguous resource allocation using the first maximum power reduction comprises transmitting the uplink signals using a cyclic prefix orthogonal frequency division multiplexing (“CP-OFDM”) waveform.

11. An apparatus comprising:

a processor that:

identifies a received non-contiguous resource allocation;

calculates a fraction of resource blocks punctured from a smallest containing contiguous allocation (“SCCA”), wherein the SCCA is a smallest set of contiguous resource blocks that encompasses the non-contiguous resource allocation; and

determines a first maximum power reduction for the non-contiguous resource allocation in response to the fraction of punctured resource blocks being less than a threshold value; and

a transceiver that transmits uplink signals on the non-contiguous resource allocation using the first determined maximum power reduction in response to the fraction of punctured resource blocks being less than the threshold value.

12. The apparatus of claim 11 , wherein the non-contiguous resource allocation comprises a plurality of smaller contiguous resource allocations.

13. The apparatus of claim 11 , wherein determining the first maximum power reduction for the non-contiguous resource allocation comprises:

selecting a maximum power reduction defined for the SCCA as the MPR for the entire non-contiguous resource allocation in response to the fraction of resource blocks punctured from the SCCA being less than the threshold value; and

wherein no maximum power reduction is defined for the non-contiguous resource allocation in response to the fraction of resource blocks punctured from the SCCA not being less than the threshold value.

14. The apparatus of claim 11 , wherein determining the first maximum power reduction for the non-contiguous resource allocation comprises increasing a selected maximum power reduction for the SCCA by a value β.

15. The apparatus of claim 14 , wherein the value β is a function of the fraction of resource blocks punctured from the SCCA.

16. The apparatus of claim 15 , wherein the value β is the negative of 10 times the base 10 logarithm of the fraction of resource blocks punctured from the SCCA.

17. The apparatus of claim 11 , wherein the transceiver receives, from a wireless communication system, an indication of an additional maximum power reduction, wherein transmitting uplink signals on the non-contiguous resource allocation using the first maximum power reduction comprises increasing the indicated maximum power reduction by the first maximum power reduction.

18. The apparatus of claim 11 , wherein the threshold value is based on at least one of: a lowest resource block index of the allocation and a number of resource blocks in the SCCA.

19. The apparatus of claim 11 , wherein the threshold value is based on at least one of: a center frequency of a carrier to which the non-contiguous resource allocation belongs, and a modulation of the non-contiguous resource allocation.

20. The apparatus of claim 11 , wherein transmitting uplink signals on the non-contiguous resource allocation using the first maximum power reduction comprises transmitting the uplink signals using a cyclic prefix orthogonal frequency division multiplexing (“CP-OFDM”) waveform.