Managing sounding signals to limit power in a multicarrier wireless device

• US 9,642,098 B2
• Filed: 03/04/2016
• Issued: 05/02/2017
• 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): Onamuti, Gbemileke J
• Application Number:
  US15/060,881
• Publication Number:
  US 20160192361A1
• Time in Patent Office: 424 Days
• CPC Class Codes: H04B 7/2618 using hybrid code-time division multiple access [CDMA-TDMA]
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 2011/0096 Network synchronisation
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 41/0681 Configuration of triggering conditions
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 52/06 TPC algorithms
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• 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 56/005 compensating for timing error by adjustment in the receiver
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0473 : the resource being transmission power
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/56 : based on priority criteria
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/02 : Terminal devices

Abstract

A wireless device receives message(s) configuring cell groups and transmissions of sounding reference signals (SRSs). Uplink transmission timing in a first cell group is derived employing a cell in the first cell group and uplink transmission timing in a second cell group is derived employing a second cell in the second cell group. A first signal is transmitted on a cell of the first cell group. A first subset of the SRSs are dropped and a second subset of the SRSs are transmitted.

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 grouped into a plurality of cell groups comprising a first cell group and a second cell group, wherein;

uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and

uplink transmission timing in the second cell group is derived employing a second cell in the second cell group;

transmit a first signal on a cell of the first cell group; and

responsive to a determination that a configured transmission of sounding reference signals (SRSs) overlaps in time with a configured transmission of the first signal, and responsive to a determination that a calculated total transmission power exceeds a first power value;

drop at least one first SRS of the SRSs;

scale a transmission power of at least one second SRS of the SRSs; and

transmit the at least one second SRS.

2. The wireless device of claim 1, wherein the configured transmission of the at least one first SRS is configured for transmission in the first cell group.

3. The wireless device of claim 1, wherein the configured transmission of the at least one second SRS is configured for transmission in the second cell group.

4. The wireless device of claim 1, wherein the transmission power of the at least one second SRS is scaled employing a factor smaller than or equal to one.

5. The wireless device of claim 1, wherein the first signal comprises a physical uplink control channel signal or a physical uplink shared channel signal.

6. The wireless device of claim 1, wherein the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe.

7. The wireless device of claim 6, wherein the first signal is transmitted in the first subframe.

8. The wireless device of claim 1, wherein the first signal comprises a random access preamble.

9. The wireless device of claim 1, wherein the first power value is a maximum transmission power value associated with the wireless device.

10. The wireless device of claim 1, wherein the instructions, when executed by the one or more processors, further cause the wireless device to adjust a transmission power of a second signal responsive to a determination that the calculated total transmission power exceeds the first power value.

11. A method comprising:

receiving at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of cell groups comprising a first cell group and a second cell group, wherein;

uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and

uplink transmission timing in the second cell group is derived employing a second cell in the second cell group;

transmitting a first signal on a cell of the first cell group; and

responsive to a determination that a configured transmission of sounding reference signals (SRSs) overlaps in time with a configured transmission of the first signal and responsive to a determination that a calculated total transmission power exceeds a first power value;

dropping at least one first SRS of the SRSs;

scaling a transmission power of at least one second SRS of the SRSs; and

transmitting the at least one second SRS.

12. The method of claim 11, wherein the configured transmission of the at least one first SRS is configured for transmission in the first cell group.

13. The method of claim 11, wherein the configured transmission of the at least one second SRS is configured for transmission in the second cell group.

14. The method of claim 11, wherein the transmission power of the at least one second SRS is scaled employing a factor smaller than or equal to one.

15. The method of claim 11, wherein the first signal is a physical uplink control channel signal or a physical uplink shared channel signal.

16. The method of claim 11, wherein the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe.

17. The method of claim 16, wherein the first signal is transmitted in the first subframe.

18. The method of claim 11, wherein the first signal is a random access preamble.

19. The method of claim 11, wherein the first power value is a maximum transmission power value associated with a wireless device.

20. The method of claim 11, further comprising adjusting a transmission power of a second signal responsive to a determination that the calculated total transmission power exceeds the first power value.

21. 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 comprising a first cell group and a second cell group, wherein;

uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and

uplink transmission timing in the second cell group is derived employing a second cell in the second cell group;

receiving, by the wireless device, the at least one message;

transmitting, by the wireless device, a first signal on a cell of the first cell group; and

responsive to a determination that a configured transmission of sounding reference signals (SRSs) overlaps in time with a configured transmission of the first signal and responsive to a determination that a calculated total transmission power exceeds a first power value;

dropping, by the wireless device, at least one first SRS of the SRSs;

scaling, by the wireless device, a transmission power of at least one second SRS of the SRSs; and

transmitting, by the wireless device, the at least one second SRS.

22. The method of claim 21, wherein the configured transmission of the at least one first SRS is configured for transmission in the first cell group.

23. The method of claim 21, wherein the configured transmission of the at least one second SRS is configured for transmission in the second cell group.

24. The method of claim 21, wherein the transmission power of the at least one second SRS is scaled employing a factor smaller than or equal to one.

25. The method of claim 21, wherein the first signal is a physical uplink control channel signal or a physical uplink shared channel signal.

26. The method of claim 21, wherein the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe.

27. The method of claim 26, wherein the first signal is transmitted in the first subframe.

28. The method of claim 21, wherein the first signal is a random access preamble.

29. The method of claim 21, wherein the first power value is a maximum transmission power value associated with the wireless device.

30. The method of claim 21, further comprising adjusting a transmission power of a second signal responsive to a determination that the calculated total transmission power exceeds the first power value.

31. A system comprising:

a base station comprising;

one or more processors; and

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

transmit at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of cell groups comprising a first cell group and a second cell group, wherein;

uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and

uplink transmission timing in the second cell group is derived employing a second cell in the second cell group; and

a wireless device comprising;

one or more processors; and

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

receive the at least one message;

transmit a first signal on a cell of the first cell group; and

responsive to a determination that a configured transmission of sounding reference signals (SRSs) overlaps in time with a configured transmission of the first signal, and responsive to a determination that a calculated total transmission power exceeds a first power value;

drop at least one first SRS of the SRSs;

scale a transmission power of at least one second SRS of the SRSs; and

transmit the at least one second SRS.

32. The system of claim 31, wherein the configured transmission of the at least one first SRS is configured for transmission in the first cell group.

33. The system of claim 31, wherein the configured transmission of the at least one second SRS is configured for transmission in the second cell group.

34. The system of claim 31, wherein the transmission power of the at least one second SRS is scaled employing a factor smaller than or equal to one.

35. The system of claim 31, wherein the first signal comprises a physical uplink control channel signal or a physical uplink shared channel signal.

36. The system of claim 31, wherein the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe.

37. The system of claim 36, wherein the first signal is transmitted in the first subframe.

38. The system of claim 31, wherein the first signal comprises a random access preamble.

39. The system of claim 31, wherein the first power value is a maximum transmission power value associated with the wireless device.

40. The system of claim 31, wherein the instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to adjust a transmission power of a second signal responsive to a determination that the calculated total transmission power exceeds the first power value.