Signal power management in a multicarrier wireless device
A wireless device determines a first transmission power for a first signal starting in a first subframe and a second transmission power for a second signal starting in a second subframe. When a calculated power value is more than an allowable transmission power a power control mechanism is employed. The wireless device reduces signal transmission power during an overlap period if the first subframe and the second subframe overlap in time by less than a first duration. The wireless device drops a signal if the first subframe and the second subframe overlap in time by more than a second duration.
1. A method comprising:
receiving at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;
determining a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;
determining a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and
if a calculated transmission power exceeds an allowable transmission power:
reducing signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and
dropping a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.
2. The method of claim 1 , wherein the first signal is a random access preamble signal.
3. The method of claim 1 , further comprising decoding at least one information element to trigger transmission of the second signal.
4. The method of claim 1 , wherein the first signal is an uplink data packet or an uplink control packet.
5. The method of claim 1 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
6. The method of claim 1 , wherein the second signal is a sounding reference signal.
7. The method of claim 1 , wherein the calculated transmission power is a total transmission power of a wireless device.
8. The method of claim 1 , wherein the second signal is a random access preamble signal.
9. The method of claim 1 , further comprising transmitting the second signal if the calculated transmission power is less than the allowable transmission power.
10. The method of claim 1 , wherein the first duration is equal to the second duration.
11. 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 at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;
determine a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;
determine a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and
if a calculated transmission power exceeds an allowable transmission power:
reduce signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and
drop a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.
12. The wireless device of claim 11 , wherein the first signal is a random access preamble signal.
13. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to decode at least one information element to trigger transmission of the second signal.
14. The wireless device of claim 11 , wherein the first signal is an uplink data packet or an uplink control packet.
15. The wireless device of claim 11 , wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.
16. The wireless device of claim 11 , wherein the second signal is a sounding reference signal.
17. The wireless device of claim 11 , wherein the calculated transmission power is a total transmission power of the wireless device.
18. The wireless device of claim 11 , wherein the second signal is a random access preamble signal.
19. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit the second signal if the calculated transmission power is less than the allowable transmission power.
20. The wireless device of claim 11 , wherein the first duration is equal to the second duration.
21. A method comprising:
transmitting, by a base station and to a wireless device, at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group;
determining, by the wireless device, a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;
determining a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and
if a calculated transmission power exceeds an allowable transmission power:
reducing signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and
dropping a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.
22. The method of claim 21 , wherein the first signal is a random access preamble signal.
23. The method of claim 21 , further comprising decoding at least one information element to trigger transmission of the second signal.
24. The method of claim 21 , wherein the first signal is an uplink data packet or an uplink control packet.
25. The method of claim 21 , wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.
26. The method of claim 21 , wherein the second signal is a sounding reference signal.
27. The method of claim 21 , wherein the calculated transmission power is a total transmission power of the wireless device.
28. The method of claim 21 , wherein the second signal is a random access preamble signal.
29. The method of claim 21 , further comprising transmitting the second signal if the calculated transmission power is less than the allowable transmission power.
30. The method of claim 21 , wherein the first duration is equal to the second duration.
31. A system comprising:
a base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors of the base station, cause the base station to:
transmit at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group; and
a wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to:
determine a first transmission power for a first signal starting in a first subframe of a cell of the first cell group;
determine a second transmission power for a second signal starting in a second subframe of the second cell group, wherein the second signal overlaps, in time, with the first signal; and
if a calculated transmission power exceeds an allowable transmission power:
reduce signal transmission power of at least one of the first signal or the second signal during an overlap period if the first subframe and the second subframe overlap, in time, by less than a first duration; and
drop a transmission of at least one of the first signal or the second signal if the first subframe and the second subframe overlap, in time, by more than a second duration.
32. The system of claim 31 , wherein the first signal is a random access preamble signal.
33. The system of claim 31 , 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 decode at least one information element to trigger transmission of the second signal.
34. The system of claim 31 , wherein the first signal is an uplink data packet or an uplink control packet.
35. The system of claim 31 , wherein the allowable transmission power is a maximum allowable transmission power of the wireless device.
36. The system of claim 31 , wherein the second signal is a sounding reference signal.
37. The system of claim 31 , wherein the calculated transmission power is a total transmission power of the wireless device.
38. The system of claim 31 , wherein the second signal is a random access preamble signal.
39. The system of claim 31 , 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 the second signal if the calculated transmission power is less than the allowable transmission power.
40. The system of claim 31 , wherein the first duration is equal to the second duration.