Method and apparatus for determination of additional maximum power reduction table based on control channel location indices

1. An apparatus comprising

at least one processor;

at least one receiver; and

at least one non-transitory machine-readable memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive, using said receiver, first signaling from a wireless network specifying that stricter co-existence limits are in use for uplink transmissions;

receive, using said receiver, second signaling from the wireless network specifying at least one resource block index defining a location of an uplink control channel; and

determine, responsive to the first signaling, at least one region of an additional maximum power reduction table;

wherein the at least one region is comprised of a plurality of sub-regions corresponding to a plurality of different length of continuous resource block allocations, and where each sub-region has an associated value of additional maximum power reduction; and

wherein the plurality of different length of continuous resource block allocations in at least one sub-region of the plurality of sub-regions is determined in dependence of the signaled resource block index.

2. The apparatus according to claim 1 , where the at least one region begins at an edge of a frequency channel on a side adjacent to or close to a frequency band to be protected, and extends up to one resource block index from the at least one signaled control channel resource block index.

3. The apparatus according to claim 1 , where the step of determining determines at least one shift in at least one boundary between regions of the additional maximum power reduction table based on the signaled at least one resource block index.

4. The apparatus according to claim 1 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

determine from the first signaling the dependence of the plurality of different length of continuous resource block allocations in the at least one sub-region on the signaled resource block index.

5. The apparatus according to claim 1 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

determine an additional maximum power reduction in accordance with the determined at least one region and a length of a contiguous resource block allocation; and

transmit the contiguous resource block allocation in accordance with the determined additional maximum power reduction.

6. The apparatus according to claim 1 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

determine a second region to address counter-third order intermodulation product, where the second region mirrors a first region of the at least one region.

7. The apparatus according to claim 1 , where for a range of resource block indices that are intermediate lowest and highest resource block indices the sub-region width is a function of a lowest resource block position index of the at least one signaled control channel resource block index.

8. The apparatus according to claim 1 , where the signaling that specifies that stricter co-existence limits are in use comprises a network signaling value.

9. The apparatus according to claim 1 , where the control channel is a physical uplink control channel.

10. A computer program product comprising a program code stored in a tangible form in a non-transitory computer readable medium, the program code configured to cause an apparatus at least to:

receive first signaling from a wireless network specifying that stricter co-existence limits are in use for uplink transmissions;

receive second signaling from the wireless network specifying at least one resource block index defining a location of an uplink control channel; and

determine, responsive to the first signaling, at least one region of an additional maximum power reduction table;

wherein the at least one region is comprised of a plurality of sub-regions corresponding to a plurality of different length of continuous resource block allocations, and where each sub-region has an associated value of additional maximum power reduction; and

wherein the plurality of different length of continuous resource block allocations in at least one sub-region of the plurality of sub-regions is determined in dependence of the signaled resource block index.

11. The computer program product according to claim 10 , where the apparatus is further configured to determine at least one shift in at least one boundary between regions of the additional maximum power reduction table based on the signaled at least one resource block index.

12. The computer program product according to claim 10 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

determine from the first signaling the dependence of the plurality of different length of continuous resource block allocations in the at least one sub-region on the signaled resource block index.

13. The computer program product according to claim 10 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

determine a second region to address counter-third order intermodulation product, where the second region mirrors a first region of the at least one region.

14. An apparatus comprising

at least one processor;

at least one transmitter; and

at least one non-transitory machine-readable memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

determine an uplink control channel resource block index in accordance with an emission mask needed for a particular channel condition in a cell; and

signal, using said transmitter, the uplink control channel resource block index to a user equipment operating in the cell to enable the user equipment to determine at least region of an additional maximum power reduction table;

wherein the at least one region is comprised of a plurality of sub-regions corresponding to a plurality of different length of continuous resource block allocations, and where each sub-region has an associated value of additional maximum power reduction; and

wherein the plurality of different length of continuous resource block allocations in at least one sub-region of the plurality of sub-regions is determined in dependence of the signaled resource block index.

15. The apparatus according to claim 14 , where the uplink control channel resource block index is determined such that transmissions by the user equipment according said additional maximum power reduction table are controlled to satisfy the emission mask; and

wherein a plurality of regions in the additional maximum power reduction table are defined in dependence of the uplink control channel resource block index.

16. The apparatus according to claim 15 , where the apparatus is further configured to determine at least one shift in at least one boundary between regions of the additional maximum power reduction table.

17. The apparatus according to claim 14 , the at least one memory and the computer program code further configured to, with the at least one processor, cause the apparatus at least to:

signal the manner in which the plurality of different length of continuous resource block allocations in at least one sub-region of the plurality of sub-regions is dependent on the uplink control channel resource block index to a user equipment with a network signaling value.