Multicarrier signal transmission in wireless communications

• US 10,085,288 B2
• Filed: 08/21/2017
• Issued: 09/25/2018
• 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:
  US15/682,025
• Publication Number:
  US 20180098354A1
• Time in Patent Office: 400 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

Methods and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. If an uplink transport block (UTB) or an uplink control information (UCI) is configured for transmission via a second cell of a second cell group in parallel with a transmission of a first random access preamble (RAP) via a first cell of a first cell group, a wireless device may adjust transmission power of at least one of the UTB or the UCI. Additionally or alternatively, if a sounding reference signal (SRS) is configured for transmission via a third cell in parallel with transmission of a second RAP, the wireless device may drop the SRS.

Claims

1. A method comprising:

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

adjusting a transmission power of an uplink transport block (UTB) or an uplink control information (UCI), so that a total transmission power of the wireless device does not exceed an allowable transmission power for any overlapped portion of a first random access preamble (RAP) and at least one of the UTB or the UCI, wherein the at least one of the UTB or the UCI is configured for transmission via a second cell of a second cell group in parallel with a transmission of the first RAP via a first cell of a first cell group;

dropping a sounding reference signal (SRS), wherein;

the SRS is configured for transmission via a third cell of the second cell group in parallel with a transmission of a second RAP via the first cell, and

a calculated total transmission power of the wireless device exceeds the allowable transmission power for any overlapped portion of the second RAP and the SRS; and

transmitting, via the first cell, at least one of the first RAP or the second RAP.

2. The method of claim 1, further comprising:

transmitting the at least one of the UTB or the UCI in parallel with the first RAP, wherein the total transmission power of the wireless device does not exceed the allowable transmission power for any overlapped portion of;

the at least one of the UTB or the UCI; and

the first RAP.

3. The method of claim 2 wherein the transmitting the at least one of the first RAP or the second RAP comprises transmitting the first RAP during a first time period and 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 adjustment of the transmission power of the 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.

6. The method of claim 1, wherein the calculated total 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 adjustment of the transmission power of the at least one of the UTB or the UCI is performed over a period of one subframe.

9. The method of claim 1, wherein the first cell group is out-of-sync when the at least one of the first RAP or the second RAP is transmitted via the first cell group.

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 the 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 total transmission power is calculated for a subframe and adjustment of the transmission power of the at least one of the UTB or the UCI is performed over a period of one subframe.

13. The method of claim 1, further comprising transmitting the SRS if:

the SRS is configured for transmission via the third cell and in parallel with a transmission of the second RAP;

the calculated total transmission power does not exceed the allowable transmission power;

the third cell is in-sync; and

the SRS is not configured for transmission in parallel with transmission of other signals via the third cell.

14. A method comprising:

transmitting, by a base station and to a wireless device, at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of cell groups;

adjusting a transmission power of an uplink transport block (UTB) or an uplink control information (UCI), so that a total transmission power of the wireless device does not exceed an allowable transmission power for any overlapped portion of a first random access preamble (RAP) and at least one of the UTB or the UCI, wherein the at least one of the UTB or the UCI is configured for transmission via a second cell of a second cell group in parallel with a transmission of the first RAP via a first cell of a first cell group;

dropping a sounding reference signal (SRS), wherein;

the SRS is configured for transmission via a third cell of the second cell group in parallel with a transmission of a second RAP via the first cell, and

a calculated total transmission power of the wireless device exceeds the allowable transmission power for any overlapped portion of the second RAP and the SRS; and

transmitting, by the wireless device, to the base station, and via the first cell, at least one of the first RAP or the second RAP.

15. The method of claim 14, further comprising:

transmitting the at least one of the UTB or the UCI in parallel with the first RAP, wherein the total transmission power of the wireless device does not exceed the allowable transmission power for any overlapped portion of;

the at least one of the UTB or the UCI; and

the first RAP.

16. The method of claim 15, wherein the transmitting the at least one of the first RAP or the second RAP comprises transmitting the first RAP during a first time period and transmitting the second RAP during a second time period.

17. The method of claim 14, wherein the first RAP and the second RAP are different RAPs.

18. The method of claim 14, wherein adjustment of the transmission power of the 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.

19. The method of claim 14, wherein the calculated total transmission power is calculated for a subframe.

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

21. The method of claim 14, wherein adjustment of the transmission power of the at least one of the UTB or the UCI is performed over a period of one subframe.

22. The method of claim 14, wherein the first cell group is out-of-sync when the at least one of the first RAP or the second RAP is transmitted via the first cell group.

23. The method 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 method of claim 14, further comprising determining a transmission power for the 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 method of claim 14, wherein the calculated total transmission power is calculated for a subframe and adjustment of the transmission power of the at least one of the UTB or the UCI is performed over a period of one subframe.

26. The method of claim 14, further comprising transmitting the SRS if:

the SRS is configured for transmission via the third cell and in parallel with a transmission of the second RAP;

the calculated total transmission power does not exceed the allowable transmission power;

the third cell is in-sync; and

the SRS is not configured for transmission in parallel with transmission of other signals via the third cell.

27. 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 grouped into a plurality of cell groups;

adjust a transmission power of an uplink transport block (UTB) or an uplink control information (UCI), so that a total transmission power of the wireless device does not exceed an allowable transmission power for any overlapped portion of a first random access preamble (RAP) and at least one of the UTB or the UCI, wherein the at least one of the UTB or the UCI is configured for transmission via a second cell of a second cell group in parallel with a transmission of the first RAP via a first cell of a first cell group;

drop a sounding reference signal (SRS), wherein;

the SRS is configured for transmission via a third cell of the second cell group in parallel with a transmission of a second RAP via the first cell, and

a calculated total transmission power of the wireless device exceeds the allowable transmission power for any overlapped portion of the second RAP and the SRS; and

transmit, via the first cell, at least one of the first RAP or the second RAP.

28. The wireless device of claim 27, wherein the instructions, when executed by the one or more processors, further cause the wireless device to:

transmit the at least one of the UTB or the UCI in parallel with the first RAP, wherein the total transmission power of the wireless device does not exceed the allowable transmission power for any overlapped portion of;

the at least one of the UTB or the UCI; and

the first RAP.

29. The wireless device of claim 28, 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

transmit the second RAP during a second time period.

30. The wireless device of claim 27, wherein the first RAP and the second RAP are different RAPs.

31. The wireless device of claim 27, wherein the instructions, when executed by the one or more processors, cause the wireless device to adjust the transmission power of the at least one of the UTB or the UCI by scaling the transmission power by a scaling factor that is greater than zero and smaller than or equal to one.

32. The wireless device of claim 27, wherein the calculated total transmission power is calculated for a subframe.

33. The wireless device of claim 27, wherein the SRS is a type zero SRS.

34. The wireless device of claim 27, wherein the instructions, when executed by the one or more processors, cause the wireless device to adjust the transmission power of the at least one of the UTB or the UCI over a period of one subframe.

35. The wireless device of claim 27, wherein the first cell group is out-of-sync when the at least one of the first RAP or the second RAP is transmitted via the first cell group.

36. The wireless device 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 wireless device of claim 27, wherein the instructions, when executed by the one or more processors, cause the wireless device to determine a transmission power for the 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 wireless device of claim 27, wherein the instructions, when executed by the one or more processors, cause the wireless device to:

calculate total transmission power for a subframe; and

adjust the transmission power of the at least one of the UTB or the UCI over a period of one subframe.

39. The wireless device of claim 27, wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the SRS if:

the SRS is configured for transmission via the third cell and in parallel with a transmission of the second RAP;

the calculated total transmission power does not exceed the allowable transmission power;

the third cell is in-sync; and

the SRS is not configured for transmission in parallel with transmission of other signals via the third cell.