Multicarrier signal transmission in wireless communications
Methods, systems, and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. If a first signal is configured for transmission via a first cell of a first cell group in parallel with a transmission of a second signal via a second cell of a second cell group, a wireless device may drop, or adjust transmission power of, at least one of the first signal or the second signal.
1. A method comprising:
transmitting, by a wireless device, a transport block via a cell of a first cell group using an adjusted transmission power that satisfies an allowable transmission power associated with transmission of the transport block;
transmitting a first random access preamble (RAP), via a cell of a second cell group, that overlaps with the transmission of the transport block;
transmitting a second RAP via a cell of the second cell group; and
transmitting a sounding reference signal (SRS), wherein the transmitting the SRS is:
via a cell of the first cell group in parallel with transmission of the second RAP;
based on a calculated transmission power associated with transmission of the SRS not exceeding an allowable transmission power associated with the transmission of the SRS; and
based on the first cell group being in-sync.
2. The method of claim 1 , wherein for any overlapped portion of the transport block and the first RAP, a total transmission power of the wireless device does not exceed the allowable transmission power associated with the transmission of the transport block.
3. The method of claim 1 , wherein the transmitting the first RAP comprises transmitting the first RAP during a first time period, and transmitting the second RAP comprises transmitting the second RAP during a second time period.
4. The method of claim 1 , wherein the first RAP and the second RAP are different RAPs.
5. The method of claim 1 , wherein the adjusted transmission power of the transmission of the transport block is scaled by a scaling factor that is greater than zero and smaller than or equal to one.
6. The method of claim 1 , wherein the calculated transmission power is calculated for a subframe.
7. The method of claim 1 , wherein the SRS is a type zero SRS.
8. The method of claim 1 , wherein the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
9. The method of claim 1 , wherein the second cell group is out-of-sync when at least one of the first RAP or the second RAP is transmitted.
10. The method of claim 1 , wherein:
uplink transmission timing associated with the first cell group is based on a first reference cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second reference cell of the second cell group.
11. The method of claim 1 , further comprising determining a transmission power for a transmission of at least one of the first RAP or the second RAP before transmitting the at least one of the first RAP or the second RAP.
12. The method of claim 1 , wherein the calculated transmission power is calculated for a subframe and the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
13. The method of claim 1 , wherein the transmitting the SRS is further based on:
the SRS not being configured for transmission in parallel with and in a same cell as transmission of one or more other signals.
14. 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:
transmit a transport block via a cell of a first cell group using an adjusted transmission power that satisfies an allowable transmission power associated with transmission of the transport block;
transmit a first random access preamble (RAP), via a cell of a second cell group, that overlaps with the transmission of the transport block;
transmit a second RAP via a cell of the second cell group; and
transmit a sounding reference signal (SRS), wherein transmitting the SRS is:
via a cell of the first cell group in parallel with transmission of the second RAP;
based on a calculated transmission power associated with transmission of the SRS not exceeding an allowable transmission power associated with the transmission of the SRS; and
based on the first cell group being in-sync.
15. The wireless device of claim 14 , wherein for any overlapped portion of the transport block and the first RAP, a total transmission power of the wireless device does not exceed the allowable transmission power associated with the transmission of the transport block.
16. The wireless device of claim 14 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the first RAP during a first time period, and to transmit the second RAP during a second time period.
17. The wireless device of claim 14 , wherein the first RAP and the second RAP are different RAPs.
18. The wireless device of claim 14 , wherein the adjusted transmission power of the transmission of the transport block is scaled by a scaling factor that is greater than zero and smaller than or equal to one.
19. The wireless device of claim 14 , wherein the calculated transmission power is calculated for a subframe.
20. The wireless device of claim 14 , wherein the SRS is a type zero SRS.
21. The wireless device of claim 14 , wherein the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
22. The wireless device of claim 14 , wherein the second cell group is out-of-sync when at least one of the first RAP or the second RAP is transmitted.
23. The wireless device of claim 14 , wherein:
uplink transmission timing associated with the first cell group is based on a first reference cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second reference cell of the second cell group.
24. The wireless device of claim 14 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine a transmission power for a transmission of at least one of the first RAP or the second RAP before transmitting the at least one of the first RAP or the second RAP.
25. The wireless device of claim 14 , wherein the calculated transmission power is calculated for a subframe and the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
26. The wireless device of claim 14 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the SRS further based on:
the SRS not being configured for transmission in parallel with and in a same cell as transmission of one or more other signals.
27. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
transmit a transport block via a cell of a first cell group using an adjusted transmission power that satisfies an allowable transmission power associated with transmission of the transport block;
transmit a first random access preamble (RAP), via a cell of a second cell group, that overlaps with the transmission of the transport block;
transmit a second RAP via a cell of the second cell group; and
transmit a sounding reference signal (SRS), wherein transmitting the SRS is:
via a cell of the first cell group in parallel with transmission of the second RAP;
based on a calculated transmission power associated with transmission of the SRS not exceeding an allowable transmission power associated with the transmission of the SRS; and
based on the first cell group being in-sync.
28. The non-transitory computer-readable medium of claim 27 , wherein for any overlapped portion of the transport block and the first RAP, a total transmission power of the wireless device does not exceed the allowable transmission power associated with the transmission of the transport block.
29. The non-transitory computer-readable medium of claim 27 , wherein the instructions, when executed, configure the wireless device to transmit the first RAP during a first time period, and to transmit the second RAP during a second time period.
30. The non-transitory computer-readable medium of claim 27 , wherein the first RAP and the second RAP are different RAPs.
31. The non-transitory computer-readable medium of claim 27 , wherein the adjusted transmission power of the transmission of the transport block is scaled by a scaling factor that is greater than zero and smaller than or equal to one.
32. The non-transitory computer-readable medium of claim 27 , wherein the calculated transmission power is calculated for a subframe.
33. The non-transitory computer-readable medium of claim 27 , wherein the SRS is a type zero SRS.
34. The non-transitory computer-readable medium of claim 27 , wherein the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
35. The non-transitory computer-readable medium of claim 27 , wherein the second cell group is out-of-sync when at least one of the first RAP or the second RAP is transmitted.
36. The non-transitory computer-readable medium of claim 27 , wherein:
uplink transmission timing associated with the first cell group is based on a first reference cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second reference cell of the second cell group.
37. The non-transitory computer-readable medium of claim 27 , wherein the instructions, when executed, further configure the wireless device to determine a transmission power for a transmission of at least one of the first RAP or the second RAP before transmitting the at least one of the first RAP or the second RAP.
38. The non-transitory computer-readable medium of claim 27 , wherein the calculated transmission power is calculated for a subframe and the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
39. The non-transitory computer-readable medium of claim 27 , wherein the instructions, when executed, configure the wireless device to transmit the SRS further based on:
the SRS not being configured for transmission in parallel with and in a same cell as transmission of one or more other signals.
40. A system comprising:
a wireless device; and
a base station,
wherein the base station is configured to:
transmit one or more configuration parameters of a plurality of cells grouped into a plurality of cell groups, and
wherein the wireless device is configured to:
transmit a transport block, via a cell of a first cell group of the plurality of cell groups, using an adjusted transmission power that satisfies an allowable transmission power associated with transmission of the transport block;
transmit a first random access preamble (RAP), via a cell of a second cell group, that overlaps with the transmission of the transport block;
transmit a second RAP via a cell of the second cell group; and
transmit a sounding reference signal (SRS), wherein transmitting the SRS is:
via a cell of the first cell group in parallel with transmission of the second RAP;
based on a calculated transmission power associated with transmission of the SRS not exceeding an allowable transmission power associated with the transmission of the SRS; and
based on the first cell group being in-sync.
41. The system of claim 40 , wherein for any overlapped portion of the transport block and the first RAP, a total transmission power of the wireless device does not exceed the allowable transmission power associated with the transmission of the transport block.
42. The system of claim 40 , wherein the wireless device is configured to transmit the first RAP during a first time period, and to transmit the second RAP during a second time period.
43. The system of claim 40 , wherein the first RAP and the second RAP are different RAPs.
44. The system of claim 40 , wherein the adjusted transmission power of the transmission of the transport block is scaled by a scaling factor that is greater than zero and smaller than or equal to one.
45. The system of claim 40 , wherein the calculated transmission power is calculated for a subframe.
46. The system of claim 40 , wherein the SRS is a type zero SRS.
47. The system of claim 40 , wherein the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
48. The system of claim 40 , wherein the second cell group is out-of-sync when at least one of the first RAP or the second RAP is transmitted.
49. The system of claim 40 , wherein:
uplink transmission timing associated with the first cell group is based on a first reference cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second reference cell of the second cell group.
50. The system of claim 40 , wherein the wireless device is configured to determine a transmission power for a transmission of at least one of the first RAP or the second RAP before transmitting the at least one of the first RAP or the second RAP.
51. The system of claim 40 , wherein the calculated transmission power is calculated for a subframe and the adjusted transmission power of the transmission of the transport block is adjusted over a period of one subframe.
52. The system of claim 40 , wherein the wireless device is configured to transmit the SRS further based on:
the SRS not being configured for transmission in parallel with and in a same cell as transmission of one or more other signals.