Sounding signal in a multicarrier wireless device

• US 9,204,406 B2
• Filed: 01/17/2015
• Issued: 12/01/2015
• Est. Priority Date: 04/20/2012
• 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:
  US14/599,490
• Publication Number:
  US 20150146660A1
• Time in Patent Office: 318 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. Sounding reference signals are configured to be transmitted in a subframe. The wireless device transmits at least one packet on at least one first cell in the subframe. The wireless device transmits a first subset of the sounding reference signals and drops a second subset of the sounding reference signals.

Claims

1. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to;

i) receive at least one message comprising configuration parameters of;

(1) a plurality of cells grouped into a plurality of cell groups; and

(2) n sounding reference signals (SRSs) configured to be transmitted in a plurality of subframes, n being greater than one;

ii) transmit, on a first cell of a first cell group in said plurality of cell groups, a packet in a plurality of symbols of a first subframe in said plurality of subframes, said plurality of symbols comprising the last symbol of said first subframe;

iii) transmit a first subset of said n SRSs in said last symbol, said first subset consisting of k SRSs, wherein 1<

=k<

n; and

iv) drop a second subset of said n SRSs in said last symbol, said second subset consisting of m SRSs, wherein 1<

=m<

n.

2. The wireless device of claim 1, wherein said wireless device transmits a first SRS in at least one cell in said first cell group in said first subframe, said at least one cell excluding said first cell.

3. The wireless device of claim 1, wherein an SRS in said n SRSs is dropped if said SRS is configured to be transmitted in said first cell and in said first subframe.

4. The wireless device of claim 1, wherein said wireless device assigns a lower priority to a transmission power of an SRS compared to:

a) a priority of a transmission power of a random access preamble; and

b) a priority of a transmission power of said packet.

5. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to;

i) receive at least one message comprising configuration parameters of;

(1) a plurality of cells grouped into a plurality of cell groups; and

(2) n sounding reference signals (SRSs) configured to be transmitted in a plurality of subframes, n being greater than one;

ii) transmit, on a first cell of a first cell group in said plurality of cell groups, a packet in a plurality of symbols of a first subframe in said plurality of subframes, said plurality of symbols comprising the last symbol of said first subframe;

iii) transmit a first subset of said n SRSs in said last symbol on at least one second cell different from said first cell, said first subset consisting of k SRSs, wherein 1<

=k<

n and said at least one second cell comprises at least one cell in said first cell group; and

iv) drop a second subset of said n SRSs in said last symbol, said second subset consisting of m SRSs, wherein 1<

=m<

n.

6. The wireless device of claim 5, wherein said at least one second cell further comprises one or more cells in a second cell group in said plurality of cell groups.

7. The wireless device of claim 5, wherein an SRS in said n SRSs is dropped if said SRS is configured to be transmitted in said first cell in said first subframe.

8. The wireless device of claim 5, wherein said wireless device assigns a lower priority to a transmission power of an SRS compared to:

a) a priority of a transmission power of a random access preamble; and

b) a priority of a transmission power of said packet.

9. The wireless device of claim 5, wherein said wireless device has sufficient power to transmit in parallel said first subset of said n sounding reference signals, said second subset of said n sounding reference signals, and said packet.

10. The wireless device of claim 9, wherein said at least one second cell further comprises one or more cells in a second cell group in said plurality of cell groups.

11. The wireless device of claim 9, wherein an SRS in said n SRSs is dropped if said SRS is configured to be transmitted in said second cell group and in said second subframe.

12. The wireless device of claim 9, wherein an SRS in said n SRSs is dropped if said SRS is configured to be transmitted in said first cell and in said first subframe.

13. The wireless device of claim 9, wherein said wireless device assigns a lower priority to a transmission power of an SRS compared to:

a) a priority of a transmission power of said random access preamble; and

b) a priority of a transmission power of said packet.

14. The wireless device of claim 9, wherein said packet is one of:

a) a data packet transmitted on a physical uplink shared channel; and

b) a control packet transmitted on a physical uplink control channel.

15. The wireless device of claim 9, wherein an SRS in said n SRSs is dropped if said wireless device does not have sufficient power to transmit said SRS.

16. The wireless device of claim 9, wherein said wireless device has sufficient power to transmit in parallel said first subset of said n sounding reference signals, said second subset of said n sounding reference signals, and said packet.

17. The wireless device of claim 9, wherein said wireless device has insufficient power to transmit in parallel said first subset of said n sounding reference signals, said second subset of said n sounding reference signals, and said packet.

18. The wireless device of claim 9, wherein:

a) said first subframe is the same subframe as said second subframe; and

b) said first cell group is different from said second cell group.

19. The wireless device of claim 5, wherein an SRS in said n SRSs is dropped if said wireless device does not have sufficient power to transmit said SRS.

20. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to;

i) receive at least one message comprising configuration parameters of;

(1) a plurality of cells grouped into a plurality of cell groups; and

(2) n sounding reference signals (SRSs) configured to be transmitted in a plurality of subframes, n being greater than one;

ii) transmit, on a first cell of a first cell group in said plurality of cell groups, a packet in a plurality of symbols of a first subframe in said plurality of subframes, said plurality of symbols comprising the last symbol of said first subframe;

iii) transmit a first subset of said n SRSs in said last symbol on at least one second cell different from said first cell, said first subset consisting of k SRSs, wherein 1<

=k<

n and said at least one second cell comprises at least one cell in said first cell group;

iv) transmit a random access preamble in a second subframe in said plurality of subframes in a second cell group in said plurality of cell groups; and

v) drop a second subset of said n SRSs on at least one third cell in said second cell group in said second subframe, said second subset consisting of m SRSs, wherein 1<

=m<

n.