Channel state information transmission for secondary cells in carrier aggregation

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:

transmit channel state information (CSI) fields of a secondary cell via a first cell of a plurality of cells;

receive, in a first subframe, a message comprising one or more configuration parameters indicating that CSI transmission resources for the secondary cell is via a second cell different from the first cell;

stop, in a second subframe occurring a first quantity of subframes after the first subframe, transmission of CSI fields of the secondary cell via the first cell; and

start, in a third subframe occurring a second quantity of subframes after the first subframe, transmission of CSI fields of the secondary cell via the second cell, wherein the second quantity is greater than the first quantity.

2. The wireless device of claim 1 , wherein the wireless device maintains an activation status for the secondary cell after receiving the message and until the third subframe occurring the second quantity of subframes after the first subframe.

3. The wireless device of claim 1 , wherein the message is not configured to cause a change in an activation status of the secondary cell.

4. The wireless device of claim 1 , wherein the instructions, when executed, further cause the wireless device to receive a second message comprising one or more second configuration parameters indicating second CSI transmission resources for the secondary cell, the second CSI transmission resources being on the first cell.

5. The wireless device of claim 1 , wherein the plurality of cells are grouped into a plurality of physical uplink control channel PUCCH groups comprising:

a primary PUCCH group comprising the first cell with a primary PUCCH transmitted to a base station; and

a secondary PUCCH group comprising the second cell with a secondary PUCCH transmitted to the base station.

6. The wireless device of claim 1 , wherein the first cell is a primary cell and the second cell is a PUCCH secondary cell.

7. The wireless device of claim 1 , wherein the first cell is a PUCCH secondary cell and the second cell is a primary cell.

8. The wireless device of claim 1 , wherein the second cell is initially deactivated when configured.

9. The wireless device of claim 1 , wherein the instructions, when executed, further cause the wireless device to transmit or receive at least one transport block in a subframe between the first subframe and the third subframe occurring the second quantity of subframes after the first subframe.

10. The wireless device of claim 1 , wherein the instructions, when executed, further cause the wireless device to monitor a control channel in subframes from the first subframe to the third subframe occurring the second quantity of subframes after the first subframe.

11. A base station comprising:

one or more processors; and

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

receive from a wireless device, channel state information (CSI) fields of a secondary cell via a first cell of a plurality of cells;

transmit, in a first subframe, a message comprising one or more configuration parameters indicating that CSI transmission resources for the secondary cell is via a second cell different from the first cell;

stop, in a second subframe occurring a first quantity of subframes after the first subframe, reception of CSI fields of the secondary cell via the first cell from the wireless device; and

start, in a third subframe occurring a second quantity of subframes after the first subframe, reception of CSI fields of the secondary cell via the second cell from the wireless device, wherein the second quantity is greater than the first quantity.

12. The base station of claim 11 , wherein the base station maintains an activation status of the secondary cell in the wireless device after transmitting the message and until the third subframe occurring the second quantity of subframes after the first subframe.

13. The base station of claim 11 , wherein the message is not configured to cause a change in an activation status of the secondary cell.

14. The base station of claim 11 , wherein the instructions, when executed, further cause the base station to transmit a second message comprising one or more first configuration parameters indicating second CSI transmission resources for the secondary cell, the second CSI transmission resources on the first cell.

15. The base station of claim 11 , wherein the plurality of cells are grouped into a plurality of physical uplink control channel PUCCH groups comprising:

a primary PUCCH group comprising the first cell with a primary PUCCH received by the base station; and

a secondary PUCCH group comprising the second cell with a secondary PUCCH received by the base station.

16. The base station of claim 11 , wherein the first cell is a primary cell and the second cell is a PUCCH secondary cell.

17. The base station of claim 11 , wherein the first cell is a PUCCH secondary cell and the second cell is a primary cell.

18. The base station of claim 11 , wherein the second cell is initially deactivated in the wireless device when configured.

19. The base station of claim 11 , wherein the instructions, when executed, further cause the base station to transmit or receive at least one transport block in a subframe between the first subframe and the third subframe occurring the second quantity of subframes after the first subframe.

20. The base station of claim 11 , wherein the instructions, when executed, further cause the base station to transmit to the wireless device a control channel in subframes from the first subframe to the first subframe and the third subframe occurring the second quantity of subframes after the first subframe.