Wireless device transmission power

1. A method for use by a wireless device, the method comprising:

a) receiving from a base station at least one radio resource control message comprising configuration parameters of a plurality of cells grouped into a plurality of cell groups;

b) transmitting a first packet in subframe n of a first cell of a first cell group in said plurality of cell groups;

c) transmitting a second packet in subframe n+1 of a second cell of a second cell group in said plurality of cell groups, said transmitting of said second packet overlapping in time with said transmitting of said first packet; and

d) reducing a subframe transmission power of at least one of said first packet and said second packet if a power value is more than a maximum allowable transmission power, a calculation for said power value considering transmission power of said first packet and said second packet if said overlapping in time exceeds a first duration.

2. The method of claim 1 , wherein:

a) said plurality of cells comprise a primary cell and at least one secondary cell;

b) said plurality of cell groups comprise a primary cell group and a secondary cell group;

c) said primary cell group comprises a first subset of said plurality of cells comprising cell primary cell; and

d) said secondary cell group comprises a second subset of said at least one secondary cell.

3. The method of claim 1 , wherein said calculated power value is a total transmission power of said wireless device.

4. The method of claim 1 , further comprising determining said first duration such that said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlapping in time.

5. The method of claim 1 , wherein said first duration is more than twenty micro seconds.

6. The method of claim 1 , further comprising reducing a transient transmission power of at least one of said first packet and said second packet during said overlapping in time, said overlapping in time being less than said first duration.

7. The method of claim 1 , wherein said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlapping in time.

8. The method of claim 1 , wherein said calculation considers transmission power of one of said first packet and said second packet if said overlapping in time is less than a second duration.

9. The method of claim 1 , wherein said first packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.

10. The method of claim 1 , wherein said second packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.

11. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to:

i) receive from a base station at least one radio resource control message comprising configuration parameters of a plurality of cells grouped into a plurality of cell groups;

ii) transmit a first packet in subframe n of a first cell of a first cell group in said plurality of cell groups;

iii) transmit a second packet in subframe n+1 of a second cell of a second cell group in said plurality of cell groups, said transmitting of said second packet overlapping in time with said transmitting of said first packet; and

iv) reduce a subframe transmission power of at least one of said first packet and said second packet if a power value is more than a maximum allowable transmission power, a calculation for said power value considering transmission power of said first packet and said second packet if said overlapping in time exceeds a first duration.

12. The wireless device of claim 11 , wherein:

a) said plurality of cells comprise a primary cell and at least one secondary cell;

b) said plurality of cell groups comprise a primary cell group and a secondary cell group;

c) said primary cell group comprises a first subset of said plurality of cells comprising cell primary cell; and

d) said secondary cell group comprises a second subset of said at least one secondary cell.

13. The wireless device of claim 11 , wherein said calculated power value is a total transmission power of said wireless device.

14. The wireless device of claim 11 , wherein said instructions, when executed, further cause said wireless device to determine said first duration such that said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlapping in time.

15. The wireless device of claim 11 , wherein said first duration is more than twenty micro seconds.

16. The wireless device of claim 11 , wherein said instructions, when executed, further cause said wireless device to reduce a transient transmission power of at least one of said first packet and said second packet during said overlapping in time, said overlapping in time being less than said first duration.

17. The wireless device of claim 11 , wherein said total transmission power is less than or equal to said maximum allowable transmission power of said wireless device during said overlapping in time.

18. The wireless device of claim 11 , wherein said calculation considers transmission power of one of said first packet and said second packet if said overlapping in time is less than a second duration.

19. The wireless device of claim 11 , wherein said first packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.

20. The wireless device of claim 11 , wherein said second packet is transmitted on one of:

a) a physical uplink control channel; and

b) a physical uplink shared channel.