Channel State Information Transmission

• US 20160277162A1
• Filed: 03/13/2016
• Published: 09/22/2016
• Est. Priority Date: 03/16/2015
• Status: Active Grant

• Current Assignee: Ofinno, LLC
• Original Assignee: Ofinno Technologies, LLC
• Inventors: Dinan, Esmael Hejazi
• Granted Patent: US 9,980,204 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/38 triggered by timers

Abstract

A plurality of cells comprise a PUCCH secondary cell with a secondary PUCCH. The wireless device receives, in subframe n, a media-access-control control element indicating activation of the PUCCH secondary cell. The wireless device starts transmission of channel state information (CSI) fields for the PUCCH secondary cell from subframe n+8+k. k is an integer depending, at least in part, on when the PUCCH secondary cell is successfully detected by the wireless device.

Claims

1. A method comprising:

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

a primary cell with a primary physical uplink control channel (PUCCH) transmitted to a base station; and

a PUCCH secondary cell with a secondary PUCCH transmitted to the base station;

receiving, in subframe n, a media-access-control control element indicating activation of the PUCCH secondary cell;

starting transmission of channel state information (CSI) fields for the PUCCH secondary cell from subframe n+8+k; and

wherein k is an integer depending, at least in part, on when the PUCCH secondary cell is successfully detected by the wireless device.

2. The method of claim 1, further comprising starting a deactivation timer associated with the PUCCH secondary cell in subframe n+8.

3. The method of claim 1, wherein the wireless device employs a next available uplink resource for transmitting the CSI fields if there are no uplink resources for transmission of the CSI fields in subframe n+8+k.

4. The method of claim 1, wherein the plurality of cells are grouped into a plurality of PUCCH groups comprising:

a primary PUCCH group comprising the primary cell; and

a secondary PUCCH group comprising the PUCCH secondary cell.

5. The method of claim 4, further comprising starting transmission of the CSI fields of an activated cell in the secondary PUCCH group from subframe n+8+k.

6. The method of claim 1, wherein the PUCCH secondary cell remains detectable during a cell activation delay.

7. The method of claim 1, wherein the PUCCH secondary cell is detected on a first attempt.

8. The method of claim 1, wherein a CSI field comprising an out of range CQI is transmitted when no valid CSI field with a channel quality index (CQI) different from zero is available.

9. A method comprising:

receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells, the plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups comprising;

a primary PUCCH group comprising a primary cell with a primary PUCCH; and

a secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH;

receiving, in subframe m, a first media-access-control control element (MAC CE) indicating activation of a secondary cell in the primary PUCCH group;

starting transmission of channel state information (CSI) fields of the secondary cell from subframe m+8;

receiving, in subframe n, a second MAC CE indicating activation of the PUCCH secondary cell; and

starting transmission of CSI fields for the PUCCH secondary cell from subframe n+8+k, wherein k is an integer depending, at least in part, on when the PUCCH secondary cell is successfully detected by the wireless device.

10. The method of claim 9, further comprising:

starting a first deactivation timer associated with the secondary cell in subframe m+8; and

starting a second deactivation timer associated with the PUCCH secondary cell in subframe n+8.

11. The method of claim 9, further comprising starting transmission of CSI fields of a first secondary cell in the secondary PUCCH group from subframe n+8+k, wherein the second MAC CE further indicates activation of the first secondary cell.

12. The method of claim 9, wherein the wireless device employs a next available uplink resource for transmitting the CSI fields if there are no uplink resources for transmitting a CSI field of the CSI fields for the PUCCH secondary cell in subframe n+8+k.

13. The method of claim 9, further comprising starting transmission of CSI fields of an activated cell in the secondary PUCCH group from subframe n+8+k.

14. The method of claim 9, wherein the PUCCH secondary cell remains detectable during a cell activation delay.

15. The method of claim 9, wherein the PUCCH secondary cell is detected on a first attempt.

16. The method of claim 9, wherein a CSI field comprising an out of range CQI is transmitted when no valid CSI field with a channel quality index (CQI) different from zero is available.

17. A method comprising:

receiving, by a wireless device from a base station, at least one message comprising configuration parameters of a plurality of cells, the plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups comprising;

a primary PUCCH group comprising a primary cell with a primary PUCCH; and

a secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH;

receiving, in subframe m, a first media-access-control control element (MAC CE) indicating activation of a plurality of secondary cells comprising;

a secondary cell in the primary PUCCH group; and

the PUCCH secondary cell;

starting transmission of channel state information (CSI) fields of the secondary cell from subframe m+8; and

starting transmission of CSI fields for the PUCCH secondary cell from subframe m+8+k, wherein k is an integer number depending, at least in part, on when the PUCCH secondary cell is successfully detected by the wireless device.

18. The method of claim 17, further comprising:

starting a first deactivation timer associated with the secondary cell in subframe m+8; and

starting a second deactivation timer associated with the PUCCH secondary cell in subframe m+8.

19. The method of claim 17, further comprising starting transmission of CSI fields of a first secondary cell in the secondary PUCCH group from subframe m+8+k, wherein the first MAC CE further indicates activation of the first secondary cell.

20. The method of claim 17, further comprising transmitting a CSI field comprising an out of range CQI when no valid CSI field with a channel quality index (CQI) different from zero is available.