Multicarrier signal transmission in wireless communications

• US 9,743,431 B2
• Filed: 11/01/2015
• Issued: 08/22/2017
• Est. Priority Date: 01/25/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Hailu, Kibrom T
• Application Number:
  US14/929,410
• Publication Number:
  US 20160057710A1
• Time in Patent Office: 660 Days
• Field of Search: None
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/085 collision avoidance

Abstract

A wireless device transmits a random access preamble (RAP) on a first cell of a first cell group. If a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) on a second cell of a second cell group overlaps in time with transmission of the RAP, the wireless device adjusts transmission power of at least one of the UTB or the UCI. If a configured transmission of a sounding reference signal (SRS) on a third cell overlaps in time with transmission of the preamble, the wireless device drops the configured SRS transmission if a calculated total transmission power exceeds a first value.

Claims

1. 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 message comprising configuration parameters of a plurality of cells being grouped into a plurality of cell groups;

transmit a random access preamble (RAP) via a first cell of a first cell group;

if a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) via a second cell of a second cell group overlaps in time with transmission of the RAP, adjust transmission power of at least one of the UTB or the UCI so that a total transmission power does not exceed a first power value; and

if a configured transmission of a sounding reference signal (SRS) via a third cell of the second cell group overlaps in time with transmission of the RAP, and if a calculated total transmission power exceeds the first power value, drop the configured transmission of the SRS.

2. The wireless device of claim 1, wherein adjustment of the transmission power of at least one of the UTB or the UCI comprises scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

3. The wireless device of claim 1, wherein the calculated total transmission power is calculated for a subframe.

4. The wireless device of claim 1, wherein the SRS is a type zero SRS.

5. The wireless device of claim 1, wherein adjustment of the transmission power is performed over period of one subframe.

6. The wireless device of claim 1, wherein the first cell group is out-of-sync when the RAP is transmitted via the first cell group.

7. The wireless device 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.

8. The wireless device of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine a transmission power for the RAP before transmitting the RAP.

9. The wireless device of claim 1, wherein the calculated total transmission power is calculated for a subframe and adjustment of the transmission power is performed over the period of one subframe.

10. The wireless device of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to perform the configured transmission of the SRS if:

the configured transmission of the SRS via the third cell overlaps in time with transmission of the RAP;

the calculated total transmission power does not exceed the first power value;

the third cell is in-sync; and

the configured transmission of the SRS via the third cell does not overlap in time with transmission of other signals via the third cell.

11. A method comprising:

receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells being grouped into a plurality of cell groups;

transmitting a random access preamble (RAP) via a first cell of a first cell group;

if a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) via a second cell of a second cell group overlaps in time with transmission of the RAP, adjusting transmission power of at least one of the UTB or the UCI so that a total transmission power does not exceed a first power value; and

if a configured transmission of a sounding reference signal (SRS) via a third cell of the second cell group overlaps in time with transmission of the RAP, and if a calculated total transmission power exceeds the first power value, dropping the configured transmission of the SRS.

12. The method of claim 11, wherein adjustment of the transmission power of at least one of the UTB or the UCI comprises scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

13. The method of claim 11, wherein the calculated total transmission power is calculated for a subframe.

14. The method of claim 11, wherein the SRS is a type zero SRS.

15. The method of claim 11, wherein adjustment of the transmission power is performed over a period of one subframe.

16. The method of claim 11, wherein the first cell group is out-of-sync when the RAP is transmitted via the first cell group.

17. The method of claim 11, wherein:

uplink transmission timing associated with the first cell group is based on a first a 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.

18. The method of claim 11, further comprising determining a transmission power for the RAP before transmitting the RAP.

19. The method of claim 11, wherein the calculated total transmission power is calculated for a subframe and adjustment of the transmission power is performed over a period of one subframe.

20. The method of claim 11, wherein configured transmission of the SRS is performed if:

the configured transmission of the SRS via the third cell overlaps in time with transmission of the RAP;

the calculated total transmission power does not exceed the first power value;

the third cell is in-sync; and

the configured transmission of the SRS via the third cell does not overlap in time with transmission of other signals via the third cell.

21. A system comprising:

a wireless device comprising;

one or more processors; and

one or more memories storing instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to;

receive at least one message comprising configuration parameters of a plurality of cells being grouped into a plurality of cell groups;

transmit a random access preamble (RAP) via a first cell of a first cell group;

if a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) via a second cell of a second cell group overlaps in time with transmission of the RAP, adjust transmission power of at least one of the UTB or the UCI so that a total transmission power does not exceed a first power value; and

if a configured transmission of a sounding reference signal (SRS) via a third cell of the second cell group overlaps in time with transmission of the RAP, and if a calculated total transmission power exceeds the first power value, drop the configured transmission of the SRS; and

a base station comprising;

one or more processors; and

one or more memories storing instructions that, when executed by the one or more processors of the base station, cause the base station to;

receive, via the second cell, at least one of the UTB or the UCI.

22. The system of claim 21, wherein adjustment of the transmission power of at least one of the UTB or the UCI comprises scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

23. The system of claim 21, wherein the calculated total transmission power is calculated for a subframe.

24. The system of claim 21, wherein the SRS is a type zero SRS.

25. The system of claim 21, wherein adjustment of the transmission power is performed over a period of one subframe.

26. The system of claim 21, wherein the first cell group is out-of-sync when the RAP is transmitted via the first cell group.

27. The system of claim 21, 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.

28. The system of claim 21, wherein the instructions stored in the one or more memories of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to determine a transmission power for the RAP before transmitting the RAP.

29. The system of claim 21, wherein the calculated total transmission power is calculated for a subframe, and adjustment of the transmission power is performed over a period of one subframe.

30. The system of claim 21, wherein the instructions stored in the one or more memories of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to perform the configured transmission of the SRS if:

the configured transmission of the SRS via the third cell overlaps in time with transmission of the RAP;

the calculated total transmission power does not exceed the first power value;

the third cell is in-sync; and

the configured transmission of the SRS via the third cell does not overlap in time with transmission of other signals via the third cell.

31. The system of claim 21, wherein the one or more memories of the base station further store instructions that, when executed by the one or more processors of the base station, cause the base station to receive, via the first cell, the RAP.

32. A method comprising:

receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells being grouped into a plurality of cell groups;

transmitting, by the wireless device, a random access preamble (RAP) via a first cell of a first cell group;

if a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) via a second cell of a second cell group overlaps in time with transmission of the RAP, configuring transmission power of at least one of the UTB or the UCI so that a total transmission power does not exceed a first power value; and

if a configured transmission of a sounding reference signal (SRS) via a third cell of the second cell group overlaps in time with transmission of the RAP, and if a calculated total transmission power exceeds the first power value, dropping the configured transmission of the SRS.

33. The method of claim 32, wherein the configuring transmission power of at least one of the UTB or the UCI comprises reducing transmission power of the UTB.

34. The method of claim 32, wherein the configuring transmission power of at least one of the UTB or the UCI comprises scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

35. The method of claim 32, wherein the calculated total transmission power is calculated for a subframe.

36. The method of claim 32, wherein the SRS is a type zero SRS.

37. The method of claim 32, wherein the configuring transmission power is performed over a period of one subframe.

38. The method of claim 32, wherein the first cell group is out-of-sync when the RAP is transmitted via the first cell group.

39. The method of claim 32, 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.

40. The method of claim 32, further comprising determining a transmission power for the RAP before transmitting the RAP.

41. The method of claim 32, wherein the calculated total transmission power is calculated for a subframe and the configuring transmission power is performed over a period of one subframe.

42. The method of claim 32, wherein the configured transmission of the SRS is performed if:

the configured transmission of the SRS via the third cell overlaps in time with transmission of the RAP,

the calculated total transmission power does not exceed the first power value;

the third cell is in-sync; and

the configured transmission of the SRS via the third cell does not overlap in time with transmission of other signals via the third cell.

43. 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 message comprising configuration parameters of a plurality of cells being grouped into a plurality of cell groups;

transmit a random access preamble (RAP) via a first cell of a first cell group;

if a configured transmission of an uplink transport block (UTB) or an uplink control information (UCI) via a second cell of a second cell group overlaps in time with transmission of the RAP, configure transmission power of at least one of the UTB or the UCI so that a total transmission power does not exceed a first power value; and

if a configured transmission of a sounding reference signal (SRS) via a third cell of the second cell group overlaps in time with transmission of the RAP, and if a calculated total transmission power exceeds the first power value, drop the configured transmission of the SRS.

44. The wireless device of claim 43, wherein the configuring transmission power of at least one of the UTB or the UCI comprises reducing transmission power of the UTB.

45. The wireless device of claim 43, wherein the configuring transmission power of at least one of the UTB or the UCI comprises scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

46. The wireless device of claim 43, wherein the calculated total transmission power is calculated for a subframe.

47. The wireless device of claim 43, wherein the SRS is a type zero SRS.

48. The wireless device of claim 43, wherein the configuring transmission power is performed over a period of one subframe.

49. The wireless device of claim 43, wherein the first cell group is out-of-sync when the RAP is transmitted via the first cell group.

50. The wireless device of claim 43, 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.

51. The wireless device of claim 43, wherein the memory further comprises instructions that, when executed by the one or more processors, cause the wireless device to determine a transmission power for the RAP before transmitting the RAP.

52. The wireless device of claim 43, wherein the calculated total transmission power is calculated for a subframe and the configuring transmission power is performed over a period of one subframe.

53. The wireless device of claim 43, wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors, further cause the wireless device to perform the configured transmission of the SRS if:

the configured transmission of the SRS via the third cell overlaps in time with transmission of the RAP,

the calculated total transmission power does not exceed the first power value;

the third cell is in-sync; and

the configured transmission of the SRS via the third cell does not overlap in time with transmission of other signals via the third cell.