Managing sounding signals to limit power in a multicarrier wireless device

• US 9,319,194 B2
• Filed: 11/30/2015
• Issued: 04/19/2016
• Est. Priority Date: 01/25/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Ofinno Technologies, LLC (Ofinno, LLC)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): ONAMUTI, GBEMILEKE J
• Application Number:
  US14/953,827
• Publication Number:
  US 20160080126A1
• Time in Patent Office: 141 Days
• US Class Current: 1/1
• 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 if transmission of SRSs overlap in time with transmission of the first signal and a calculated total transmission power exceeds a first power value.

Claims

1. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed, 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 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

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

drop a first subset of the SRSs; and

transmit a second subset of the SRSs.

2. The wireless device of claim 1, wherein:

the first subset of the SRSs comprises one or more of the SRSs; and

the second subset of the SRSs comprises one or more of the SRSs.

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

4. 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.

5. The wireless device of claim 1, wherein:

a) the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe; and

b) the first signal is transmitted in the first subframe.

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

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

8. The wireless device of claim 1, wherein the instructions, when executed, further cause the wireless device to adjust transmission power of the second subset of the SRSs.

9. The wireless device of claim 1, wherein the instructions, when executed, further cause the wireless device to adjust a transmission power of a second signal if the calculated total transmission power exceeds the first power value.

10. The wireless device of claim 9, wherein the second signal is one of a physical uplink control channel signal and a physical uplink shared channel signal.

11. A method comprising:

receiving at least one message comprising configuration parameters of a plurality of cells being 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

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

dropping a first subset of the SRSs; and

transmitting a second subset of the SRSs.

12. The method of claim 11, wherein:

the first subset of the SRSs consist of one or more of the SRSs; and

the second subset of the SRSs consist of one or more of the SRSs.

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

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

15. The method of claim 11, wherein:

a) the configured transmission of the SRSs is configured for transmission in a last symbol of a first subframe; and

b) the first signal is transmitted in the first subframe.

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

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

18. The method of claim 11, wherein the instructions, when executed, further cause the wireless device to adjust transmission power of the second subset of the SRSs.

19. The method of claim 11, wherein the instructions, when executed, further cause the wireless device to adjust a transmission power of a second signal if the calculated total transmission power exceeds the first power value.

20. The method of claim 19, wherein the second signal is one of a physical uplink control channel signal and a physical uplink shared channel signal.