Resource allocation for multicarrier communications

1. A method comprising:

receiving, by a wireless device from a base station, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

transmitting, based on the pathloss reference parameter, an uplink signal via the SCell.

2. The method of claim 1 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, the method further comprising transmitting, based on the second pathloss reference parameter, an uplink signal via the second SCell.

3. The method of claim 2 , wherein a transmission power of the uplink signal via the second SCell is based on at least one power control parameter in the at least one control message.

4. The method of claim 2 , wherein:

the pathloss reference parameter is a first binary information element; and

the second pathloss reference parameter is a second binary information element.

5. The method of claim 1 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

6. The method of claim 5 , wherein:

the first time alignment timer indicates a duration of time that the cell group is uplink time aligned; and

the second time alignment timer indicates a duration of time that the second cell group is uplink time aligned.

7. The method of claim 1 , further comprising receiving, by the wireless device, a media access control (MAC) timing advance command, wherein the MAC timing advance command is for one of the plurality of cell groups.

8. The method of claim 1 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

9. The method of claim 8 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

10. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive, from a base station, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

transmit, based on the pathloss reference parameter, an uplink signal via the SCell.

11. The wireless device of claim 10 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, and wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit, based on the second pathloss reference parameter, an uplink signal via the second SCell.

12. The wireless device of claim 11 , wherein a transmission power of the uplink signal via the second SCell is based on at least one power control parameter in the at least one control message.

13. The wireless device of claim 11 , wherein:

the pathloss reference parameter is a first binary information element; and

the second pathloss reference parameter is a second binary information element.

14. The wireless device of claim 10 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

15. The wireless device of claim 14 , wherein:

the first time alignment timer indicates a duration of time that the cell group is uplink time aligned; and

the second time alignment timer indicates a duration of time that the second cell group is uplink time aligned.

16. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a media access control (MAC) timing advance command, wherein the MAC timing advance command is for one of the plurality of cell groups.

17. The wireless device of claim 10 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

18. The wireless device of claim 17 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

19. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

receive, from a base station, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

transmit, based on the pathloss reference parameter, an uplink signal via the SCell.

20. The non-transitory computer-readable medium of claim 19 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, and wherein the instructions, when executed, configure the wireless device to transmit, based on the second pathloss reference parameter, an uplink signal via the second SCell.

21. The non-transitory computer-readable medium of claim 20 , wherein a transmission power of the uplink signal via the second SCell is based on at least one power control parameter in the at least one control message.

22. The non-transitory computer-readable medium of claim 20 , wherein:

the pathloss reference parameter is a first binary information element; and

the second pathloss reference parameter is a second binary information element.

23. The non-transitory computer-readable medium of claim 19 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

24. The non-transitory computer-readable medium of claim 23 , wherein:

the first time alignment timer indicates a duration of time that the cell group is uplink time aligned; and

the second time alignment timer indicates a duration of time that the second cell group is uplink time aligned.

25. The non-transitory computer-readable medium of claim 19 , wherein the instructions, when executed, configure the wireless device to receive a media access control (MAC) timing advance command, wherein the MAC timing advance command is for one of the plurality of cell groups.

26. The non-transitory computer-readable medium of claim 19 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

27. The non-transitory computer-readable medium of claim 26 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

28. A method comprising:

transmitting, by a base station to a wireless device, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

receiving, via the SCell, an uplink signal transmitted based on the pathloss reference parameter.

29. The method of claim 28 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, the method further comprising receiving, via the second SCell, an uplink signal transmitted based on the second pathloss reference parameter.

30. The method of claim 29 , wherein a transmission power of the uplink signal via the second SCell is based on at least one power control parameter in the at least one control message.

31. The method of claim 29 , wherein:

the pathloss reference parameter is a first binary information element; and

the second pathloss reference parameter is a second binary information element.

32. The method of claim 28 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

33. The method of claim 32 , wherein:

the first time alignment timer indicates a duration of time that the cell group is uplink time aligned; and

the second time alignment timer indicates a duration of time that the second cell group is uplink time aligned.

34. The method of claim 28 , further comprising transmitting a media access control (MAC) timing advance command, wherein the MAC timing advance command is for one of the plurality of cell groups.

35. The method of claim 28 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

36. The method of claim 35 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

37. A base station comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the base station to:

transmit, to a wireless device, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

receive, via the SCell, an uplink signal transmitted based on the pathloss reference parameter.

38. The base station of claim 37 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, and wherein the instructions, when executed by the one or more processors, further cause the base station to receive, via the second SCell, an uplink signal transmitted based on the second pathloss reference parameter.

39. The base station of claim 37 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

40. The base station of claim 37 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

41. The base station of claim 40 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

42. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:

transmit, to a wireless device, at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell; and

receive, via the SCell, an uplink signal transmitted based on the pathloss reference parameter.

43. The non-transitory computer-readable medium of claim 42 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, and wherein the instructions, when executed, further configure the base station to receive, via the second SCell, an uplink signal transmitted based on the second pathloss reference parameter.

44. The non-transitory computer-readable medium of claim 42 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

45. The non-transitory computer-readable medium of claim 42 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

46. The non-transitory computer-readable medium of claim 45 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.

47. A system comprising:

a base station comprising

one or more processors; and

memory storing instructions; and

a wireless device comprising

one or more processors; and

memory storing instructions,

wherein the instructions stored in the memory of the base station, when executed by the one or more processors of the base station, cause the base station to:

transmit at least one control message comprising a pathloss reference parameter that:

is associated with a secondary cell (SCell) in a cell group of a plurality of cell groups; and

indicates, as a pathloss reference, either:

a downlink carrier associated with the SCell; or

a downlink carrier associated with a primary cell, wherein the primary cell is associated with the cell group of the SCell, and

wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, cause the wireless device to:

receive the at least one control message; and

transmit, based on the pathloss reference parameter, an uplink signal via the SCell.

48. The system of claim 47 , wherein the at least one control message further comprises a second pathloss reference parameter associated with a second SCell, and wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to transmit, via the second SCell, an uplink signal transmitted based on the second pathloss reference parameter.

49. The system of claim 47 , wherein the at least one control message further comprises:

a first timer value for a first time alignment timer, wherein the first time alignment timer is associated with the cell group; and

a second timer value for a second time alignment timer, wherein the second time alignment timer is associated with a second cell group of the plurality of cell groups.

50. The system of claim 47 , wherein a transmission power of the uplink signal via the SCell is based on a measurement of a received power of a downlink signal on the downlink carrier indicated by the pathloss reference parameter.

51. The system of claim 50 , wherein the transmission power of the uplink signal via the SCell is further based on at least one power control parameter in the at least one control message.