Signal power management in a multicarrier wireless device
Methods, apparatuses, and systems are described for wireless communications. 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 configuration parameters of a plurality of cells;
determining a first transmission power for a first signal starting in a first time interval of a cell, of the plurality of cells, of a first cell group;
determining a second transmission power for a second signal starting in a second time interval of a 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 plurality of cells are grouped into a plurality of cell groups comprising the first cell group and the second cell group, and 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.
3. The method of claim 1 , wherein the first time interval and the second time interval each comprise at least one of:
a subframe;
a transmission time interval;
a slot;
a symbol;
a resource element;
a resource block; or
a resource block group.
4. The method of claim 1 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
5. The method of claim 1 , wherein:
the first time interval comprises the first signal; and
the second time interval comprises the second signal.
6. The method of claim 1 , further comprising:
determining a third transmission power for a third signal starting in a third time interval of a cell of the first cell group;
determining a fourth transmission power for a fourth signal starting in a fourth time interval 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.
7. The method of claim 6 , wherein the duration and the second duration are a same duration.
8. 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.
9. 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.
10. 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.
11. The method of claim 1 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
12. The method of claim 1 , wherein the calculated transmission power is a total transmission power of a wireless device.
13. 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 configuration parameters of a plurality of cells;
determine a first transmission power for a first signal starting in a first time interval of a cell, of the plurality of cells, of a first cell group;
determine a second transmission power for a second signal starting in a second time interval of a 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.
14. The wireless device of claim 13 , wherein the plurality of cells are grouped into a plurality of cell groups comprising the first cell group and the second cell group, and 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.
15. The wireless device of claim 13 , wherein the first time interval and the second time interval each comprise at least one of:
a subframe;
a transmission time interval;
a slot;
a symbol;
a resource element;
a resource block; or
a resource block group.
16. The wireless device of claim 13 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
17. The wireless device of claim 13 , wherein:
the first time interval comprises the first signal; and
the second time interval comprises the second signal.
18. The wireless device of claim 13 , 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 time interval of a cell of the first cell group;
determine a fourth transmission power for a fourth signal starting in a fourth time interval 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.
19. The wireless device of claim 18 , wherein the duration and the second duration are a same duration.
20. The wireless device of claim 13 , 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.
21. The wireless device of claim 13 , 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.
22. The wireless device of claim 13 , 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.
23. The wireless device of claim 13 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
24. The wireless device of claim 13 , wherein the calculated transmission power is a total transmission power of a wireless device.
25. A system comprising:
a wireless device and a base station;
wherein the base station is configured to:
transmit configuration parameters of a plurality of cells; and
wherein the wireless device is configured to:
receive, from the base station, the configuration parameters;
determine a first transmission power for a first signal starting in a first time interval of a cell, of the plurality of cells, of a first cell group;
determine a second transmission power for a second signal starting in a second time interval of a 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.
26. The system of claim 25 , wherein the plurality of cells are grouped into a plurality of cell groups comprising the first cell group and the second cell group, and 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.
27. The system of claim 25 , wherein the first time interval and the second time interval each comprise at least one of:
a subframe;
a transmission time interval;
a slot;
a symbol;
a resource element;
a resource block; or
a resource block group.
28. The system of claim 25 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
29. The system of claim 25 , wherein:
the first time interval comprises the first signal; and
the second time interval comprises the second signal.
30. The system of claim 25 , wherein the wireless device is further configured to:
determine a third transmission power for a third signal starting in a third time interval of a cell of the first cell group;
determine a fourth transmission power for a fourth signal starting in a fourth time interval 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.
31. The system of claim 30 , wherein the duration and the second duration are a same duration.
32. The system of claim 25 , wherein the wireless device is further configured to transmit the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
33. The system of claim 25 , 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.
34. The system of claim 25 , 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.
35. The system of claim 25 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
36. The system of claim 25 , wherein the calculated transmission power is a total transmission power of a wireless device.
37. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive configuration parameters of a plurality of cells;
determine a first transmission power for a first signal starting in a first time interval of a cell, of the plurality of cells, of a first cell group;
determine a second transmission power for a second signal starting in a second time interval of a 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.
38. The non-transitory computer-readable medium of claim 37 , wherein the plurality of cells are grouped into a plurality of cell groups comprising the first cell group and the second cell group, and 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.
39. The non-transitory computer-readable medium of claim 37 , wherein the first time interval and the second time interval each comprise at least one of:
a subframe;
a transmission time interval;
a slot;
a symbol;
a resource element;
a resource block; or
a resource block group.
40. The non-transitory computer-readable medium of claim 37 , wherein the calculated transmission power comprises the first transmission power and the second transmission power.
41. The non-transitory computer-readable medium of claim 37 , wherein:
the first time interval comprises the first signal; and
the second time interval comprises the second signal.
42. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, further configure the wireless device to:
determine a third transmission power for a third signal starting in a third time interval of a cell of the first cell group;
determine a fourth transmission power for a fourth signal starting in a fourth time interval 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.
43. The non-transitory computer-readable medium of claim 42 , wherein the duration and the second duration are a same duration.
44. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, further configure the wireless device to transmit the second signal based on a determination that the calculated transmission power is less than the allowable transmission power.
45. The non-transitory computer-readable medium of claim 37 , 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.
46. The non-transitory computer-readable medium of claim 37 , 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.
47. The non-transitory computer-readable medium of claim 37 , wherein the allowable transmission power is a maximum allowable transmission power of a wireless device.
48. The non-transitory computer-readable medium of claim 37 , wherein the calculated transmission power is a total transmission power of a wireless device.