PUCCH channel state information transmission

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:

receive configuration parameters of cells grouped into physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising a primary cell; and

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

receive, during a first subframe, a first indication to activate a secondary cell of the primary PUCCH group;

start transmission of channel state information of the secondary cell from a second subframe that is eight subframes after the first subframe;

receive, during a third subframe, a second indication for activation of the PUCCH secondary cell; and

start transmission of channel state information for the PUCCH secondary cell from a fourth subframe that is a number of subframes after the third subframe, wherein the number is based on when the wireless device successfully detects the PUCCH secondary cell.

2. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary PUCCH group from the fourth subframe, wherein a control element further indicates activation of the first secondary cell.

3. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to employ a next available uplink resource for transmitting the channel state information for the PUCCH secondary cell if there are no uplink resources for transmitting the channel state information for the PUCCH secondary cell in the fourth subframe.

4. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of an activated cell of the secondary PUCCH group from the fourth subframe.

5. The wireless device of claim 1 , wherein the PUCCH secondary cell remains detectable during a cell activation delay.

6. The wireless device of claim 1 , wherein the PUCCH secondary cell is detected on a first attempt.

7. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available.

8. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:

start a first deactivation timer associated with the secondary cell in the second subframe; and

start a second deactivation timer associated with the PUCCH secondary cell in a fifth subframe that is eight subframes after the third subframe.

9. The wireless device of claim 8 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary PUCCH group from the fourth subframe, wherein a control element further indicates activation of the first secondary cell.

10. The wireless device of claim 9 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to employ a next available uplink resource for transmitting the channel state information for the PUCCH secondary cell if there are no uplink resources for transmitting the channel state information for the PUCCH secondary cell in the fourth subframe.

11. 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:

receive, from a base station, configuration parameters of a cells grouped into physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising a primary cell; and

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

receive, during a first subframe, a first indication to activate a secondary cell of the primary PUCCH group and the PUCCH secondary cell;

start transmission of channel state information of the secondary cell of the primary PUCCH group from a second subframe that is eight subframes after the first subframe; and

start transmission of channel state information of the PUCCH secondary cell from a third subframe that is a number of subframes after the second subframe, wherein the number is based on when the wireless device successfully detects the PUCCH secondary cell.

12. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary PUCCH group from the third subframe, wherein a control element further indicates activation of the first secondary cell.

13. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available.

14. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start a first deactivation timer associated with the secondary cell in the second subframe.

15. The wireless device of claim 14 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start a second deactivation timer associated with the PUCCH secondary cell in the second subframe.

16. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start transmission of channel state information of a first secondary cell of the secondary PUCCH group from the third subframe, wherein a control element further indicates activation of the first secondary cell.

17. The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit channel state information comprising an out of range channel quality index when no valid channel state information field with a channel quality index different from zero is available.

18. The wireless device of claim 17 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, during a fourth subframe, a second indication for activation of the PUCCH secondary cell.

19. The wireless device of claim 8 , wherein the PUCCH secondary cell remains detectable during a cell activation delay.

20. The wireless device of claim 18 , wherein the PUCCH secondary cell is detected on a first attempt.