Signal power management in a multicarrier wireless device
Methods, apparatuses, and systems are described for wireless communications. Cells may be grouped into a plurality of cell groups. A wireless device may determine a first transmission power for a first signal and a second transmission power for a second signal. Based on a calculated transmission power and an overlap of the signals, a power control mechanism may be employed.
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, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the 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
based on a determination that a calculated transmission power exceeds an allowable transmission power and that the first signal and the second signal overlap, in time, by more than a duration, dropping a transmission of at least one of the first signal or the second signal.
2. The method of claim 1 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
3. The method of claim 1 , wherein:
the first subframe comprises the first signal; and
the second subframe comprises the second signal.
4. The method of claim 1 , further comprising:
determining a third transmission power for a third signal starting in a third subframe of a cell of the first cell group;
determining a fourth transmission power for a fourth signal starting in a fourth subframe of the second cell group, wherein the fourth signal overlaps, in time, with the third signal; and
based on a determination that the calculated transmission power exceeds the allowable transmission power and that the third signal and the fourth signal overlap, in time, by less than a second duration:
reducing signal transmission power of at least one of the third signal or the fourth signal; and
transmitting the third signal and the fourth signal.
5. The method of claim 4 , wherein the duration and the second duration are a same duration.
6. The method of claim 1 , further comprising transmitting the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
7. The method of claim 1 , wherein the first signal is a random access preamble signal, an uplink data packet, or an uplink control packet; and wherein the second signal is a type of signal different from the first signal.
8. The method of claim 1 , wherein the second signal is a sounding reference signal or a random access preamble signal; and wherein the first signal is a type of signal different from the second signal.
9. The method of claim 1 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
10. The method of claim 1 , wherein the calculated transmission power is a total transmission power of a wireless device.
11. 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, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the 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
based on a determination that a calculated transmission power exceeds an allowable transmission power and that the first subframe and the second subframe overlap, in time, by more than a duration, dropping a transmission of at least one of the first signal or the second signal.
12. The method of claim 11 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
13. The method of claim 11 , wherein:
the first signal ends in the first subframe; and
the second signal ends in the second subframe.
14. The method of claim 11 , further comprising:
determining a third transmission power for a third signal starting in a third subframe of a cell of the first cell group;
determining a fourth transmission power for a fourth signal starting in a fourth subframe of the second cell group, wherein the fourth signal overlaps, in time, with the third signal; and
based on a determination that the calculated transmission power exceeds the allowable transmission power and that the third subframe and the fourth subframe overlap, in time, by less than a second duration:
reducing signal transmission power of at least one of the third signal or the fourth signal; and
transmitting the third signal and the fourth signal.
15. The method of claim 14 , wherein the duration and the second duration are a same duration.
16. The method of claim 11 , further comprising transmitting the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
17. The method of claim 11 , wherein the first signal is a random access preamble signal, an uplink data packet, or an uplink control packet; and wherein the second signal is a type of signal different from the first signal.
18. The method of claim 11 , wherein the second signal is a sounding reference signal or a random access preamble signal; and wherein the first signal is a type of signal different from the second signal.
19. The method of claim 11 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
20. The method of claim 11 , wherein the calculated transmission power is a total transmission power of a wireless device.
21. 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, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the 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
based on a determination that a calculated transmission power exceeds an allowable transmission power and that the first signal and the second signal overlap, in time, by more than a duration, drop a transmission of at least one of the first signal or the second signal.
22. The wireless device of claim 21 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
23. The wireless device of claim 21 , wherein:
the first subframe comprises the first signal; and
the second subframe comprises the second signal.
24. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine a third transmission power for a third signal starting in a third subframe of a cell of the first cell group;
determine a fourth transmission power for a fourth signal starting in a fourth subframe of the second cell group, wherein the fourth signal overlaps, in time, with the third signal; and
based on a determination that the calculated transmission power exceeds the allowable transmission power and that the third signal and the fourth signal overlap, in time, by less than a second duration:
reduce signal transmission power of at least one of the third signal or the fourth signal; and
transmit the third signal and the fourth signal.
25. The wireless device of claim 24 , wherein the duration and the second duration are a same duration.
26. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
27. The wireless device of claim 21 , wherein the first signal is a random access preamble signal, an uplink data packet, or an uplink control packet; and wherein the second signal is a type of signal different from the first signal.
28. The wireless device of claim 21 , wherein the second signal is a sounding reference signal or a random access preamble signal; and wherein the first signal is a type of signal different from the second signal.
29. The wireless device of claim 21 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
30. The wireless device of claim 21 , wherein the calculated transmission power is a total transmission power of a wireless device.
31. 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, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the 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
based on a determination that a calculated transmission power exceeds an allowable transmission power and that the first subframe and the second subframe overlap, in time, by more than a duration, drop a transmission of at least one of the first signal or the second signal.
32. The wireless device of claim 31 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
33. The wireless device of claim 31 , wherein:
the first signal ends in the first subframe; and
the second signal ends in the second subframe.
34. The wireless device of claim 31 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine a third transmission power for a third signal starting in a third subframe of a cell of the first cell group;
determine a fourth transmission power for a fourth signal starting in a fourth subframe of the second cell group, wherein the fourth signal overlaps, in time, with the third signal; and
based on a determination that the calculated transmission power exceeds the allowable transmission power and that the third subframe and the fourth subframe overlap, in time, by less than a second duration:
reduce signal transmission power of at least one of the third signal or the fourth signal; and
transmit the third signal and the fourth signal.
35. The wireless device of claim 34 , wherein the duration and the second duration are a same duration.
36. The wireless device of claim 31 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
37. The wireless device of claim 31 , wherein the first signal is a random access preamble signal, an uplink data packet, or an uplink control packet; and wherein the second signal is a type of signal different from the first signal.
38. The wireless device of claim 31 , wherein the second signal is a sounding reference signal or a random access preamble signal; and wherein the first signal is a type of signal different from the second signal.
39. The wireless device of claim 31 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
40. The wireless device of claim 31 , wherein the calculated transmission power is a total transmission power of a wireless device.