Sounding signal in a multicarrier wireless device

• US 8,964,683 B2
• Filed: 04/14/2013
• Issued: 02/24/2015
• 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): Ghowrwal, Omar
• Assistant Examiner(s): ONAMUTI, GBEMILEKE J
• Application Number:
  US13/862,423
• Publication Number:
  US 20130279434A1
• Time in Patent Office: 681 Days
• Field of Search: 370/330, 370/329
• US Class Current: 370/329
• 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. n sounding reference signals are configured to be transmitted in a subframe (n>1). The wireless device transmits at least one packet on at least one first cell in symbols of the subframe. The symbols comprise the last symbol of the subframe. The wireless device transmits a k subset of the n sounding reference signals in the last symbol (1<=k<n). The wireless device drops an m subset of the n sounding reference signals in the last symbol (1<=m<n).

Claims

1. A method comprising:

a) receiving, by a wireless device, at least one radio resource control message from a base station, said at least one radio resource control message to cause in said wireless device;

i) configuration of a primary cell and at least one secondary cell in a plurality of cells;

ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;

(1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and

(2) a secondary cell group comprising a second subset of said at least one secondary cell; and

iii) configuration of transmissions of sounding reference signals by said wireless device, n sounding reference signals configured to be transmitted in a first subframe, n being greater than 1;

b) transmitting, by said wireless device, at least one packet on at least one first cell in said plurality of cells in a plurality of symbols of said first subframe, said plurality of symbols comprising the last symbol of said first subframe;

c) transmitting, by said wireless device, a k subset of said n sounding reference signals in said last symbol, wherein 1<

=k<

n; and

d) dropping, by said wireless device, an m subset of said n sounding reference signals in said last symbol, wherein 1<

=m<

n.

2. The method of claim 1, wherein said wireless device has sufficient power to transmit in parallel both said k subset of said n sounding reference signals and said at least one packet.

3. The method of claim 1, wherein said wireless device has insufficient power to transmit in parallel said k subset of said n sounding reference signals, said m subset of said n sounding reference signals, and said at least one packet.

4. The method of claim 1, further comprising dropping a sounding reference signal in said n sounding reference signals if:

a) said wireless device has sufficient power to transmit both said sounding reference signal and said at least one packet; and

b) said sounding reference signal is configured to be transmitted on a cell in said at least one first cell.

5. The method of claim 1, further comprising dropping said sounding reference signal in said last symbol if:

a) said wireless device has sufficient power to transmit both said sounding reference signal and said at least one packet; and

b) said sounding reference signal is configured to be transmitted on a cell in parallel with a random access preamble transmitted on said cell.

6. The method of claim 1, wherein transmission of said sounding reference signal is triggered by receiving a PDCCH packet or one or more of said at least one first radio resource control message.

7. The method of claim 1, wherein said configuration of said sounding reference signal indicates a transmission period of said sounding reference signals.

8. The method of claim 1, wherein said wireless device gives a transmission power of said sounding reference signal a lower priority compared with:

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

b) a priority of a transmission power of said at least one packet.

9. The method of claim 1, wherein a packet in said at least one packet is at least one of the following:

a) a physical uplink control channel packet; and

b) a physical uplink shared channel packet.

10. A method comprising:

a) receiving, by a wireless device, at least one radio resource control message from a base station, said at least one radio resource control message to cause in said wireless device;

i) assignment of each of at least one secondary cell in a plurality of cells to a cell group in a plurality of cell groups, each of said plurality of cell groups comprising a subset of said plurality of cells; and

ii) configuration of transmissions of sounding reference signals by said wireless device, n sounding reference signals configured to be transmitted in a first subframe, n being greater than 1;

b) transmitting, by said wireless device, at least one packet on at least one first cell in said plurality of cells in a plurality of symbols of said first subframe, said plurality of symbols comprising the last symbol of said first subframe;

c) transmitting, by said wireless device, a k subset of said n sounding reference signals in said last symbol, wherein 1<

=k<

n; and

d) dropping, by said wireless device, an m subset of said n sounding reference signals in said last symbol, wherein 1<

=m<

n.

11. The method of claim 10, wherein said wireless device has sufficient power to transmit in parallel, both said k subset of said n sounding reference signals and said at least one packet.

12. The method of claim 10, wherein said wireless device has insufficient power to transmit in parallel said k subset of said n sounding reference signals, said m subset of said n sounding reference signals, and said at least one packet.

13. The method of claim 10, further comprising dropping a sounding reference signal in said n sounding reference signals if:

a) said wireless device has sufficient power to transmit both said sounding reference signal and said at least one packet; and

b) said sounding reference signal is configured to be transmitted on a cell in said at least one first cell.

14. The method of claim 10, further comprising dropping said sounding reference signal in said last symbol if:

a) said wireless device has sufficient power to transmit both said sounding reference signal and said at least one packet; and

b) said sounding reference signal is configured to be transmitted on a cell in parallel with a random access preamble transmitted on a cell group comprising said cell.

15. The method of claim 10, wherein transmission of said sounding reference signal is triggered by receiving a PDCCH packet or said at least one first radio resource control message.

16. 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 radio resource control message from a base station, said at least one radio resource control message to cause in said wireless device configuration of transmissions of sounding reference signals by said wireless device, n sounding reference signals configured to be transmitted in the last symbol of a first subframe, n being greater than 1;

ii) transmit at least one packet on at least one first cell in said plurality of cells in a plurality of symbols of said first subframe, said plurality of symbols comprising the last symbol of said first subframe;

iii) transmit a k subset of said n sounding reference signals in said last symbol, wherein 1<

=k<

n; and

iv) drop an m subset of said n sounding reference signals in said last symbol, wherein 1<

=m<

n.

17. The wireless device of claim 16, wherein said at least one radio resource control message to cause in said wireless device configuration of assignment of each of at least one secondary cell in a plurality of cells to a cell group in a plurality of cell groups, each of said plurality of cell groups comprising a subset of said plurality of cells, said plurality of cell groups comprises:

a) a primary cell group; and

b) a secondary cell group.

18. The wireless device of claim 16, wherein said configuration of said sounding reference signal indicates a transmission period of sounding reference signals.

19. The wireless device of claim 16, wherein said wireless device gives a transmission power of said sounding reference signal a lower priority compared with:

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

b) a priority of a transmission power of said at least one packet.

20. The wireless device of claim 16, wherein a packet in said at least one packet is at least one of the following:

a) a physical uplink control channel packet; and

b) a physical uplink shared channel packet.