Modification of secondary cells in carrier aggregation
A wireless device transmits channel state information (CSI) fields of a secondary cell on a first cell. The wireless device receives, in subframe n, a message comprising one or more configuration parameters indicating that CSI transmission resources for the secondary cell is on a second cell different from the first cell. The wireless device stops, in subframe n+p, transmission of CSI fields of the secondary cell on the first cell. The wireless device starts, in subframe n+k, transmission of CSI fields of the secondary cell on the second cell, wherein k is a number greater than p.
1. A method comprising:
transmitting, by a wireless device, channel state information (CSI) fields of a secondary cell on a first cell in a plurality of cells;
receiving, in subframe n, a message comprising one or more configuration parameters indicating that CSI transmission resources for the secondary cell is on a second cell different from the first cell, wherein n is an integer;
stopping, in subframe n+p, transmission of CSI fields of the secondary cell on the first cell, wherein p is an integer number greater than one; and
starting, in subframe n+k, transmission of CSI fields of the secondary cell on the second cell, wherein k is an integer number greater than p.
2. The method of claim 1 , wherein the wireless device maintains an activation status for the secondary cell after receiving the message and until subframe n+k.
3. The method of claim 1 , wherein the message is not configured to cause a change in an activation status of the secondary cell.
4. The method of claim 1 , further comprising receiving 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 method 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 method of claim 1 , wherein the first cell is a primary cell and the second cell is a PUCCH secondary cell.
7. The method of claim 1 , wherein the first cell is a PUCCH secondary cell and the second cell is a primary cell.
8. The method of claim 1 , wherein the second cell is initially deactivated when configured.
9. The method of claim 1 , further comprising transmitting or receiving at least one transport block in a subframe between subframe n and subframe n+k.
10. The method of claim 1 , further comprising monitoring a control channel in subframes from subframe n to subframe n+k.
11. A method comprising:
receiving, by a base station from a wireless device, channel state information (CSI) fields of a secondary cell on a first cell in a plurality of cells;
transmitting, in subframe n, a message comprising one or more configuration parameters indicating that CSI transmission resources for the secondary cell is on a second cell different from the first cell;
stopping, in subframe n+p, reception of CSI fields of the secondary cell on the first cell from the wireless device, wherein p is a number greater than one; and
starting, in subframe n+k, reception of CSI fields of the secondary cell on the second cell from the wireless device, wherein k is a number greater than p.
12. The method of claim 11 , wherein the base station maintains an activation status of the secondary cell in the wireless device after receiving the message and until subframe n+k.
13. The method of claim 11 , wherein the message is not configured to cause a change in an activation status of the secondary cell.
14. The method of claim 11 , further comprising transmitting 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 method 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 method of claim 11 , wherein the first cell is a primary cell and the second cell is a PUCCH secondary cell.
17. The method of claim 11 , wherein the first cell is a PUCCH secondary cell and the second cell is a primary cell.
18. The method of claim 11 , wherein the second cell is initially deactivated in the wireless device when configured.
19. The method of claim 11 , further comprising transmitting or receiving at least one transport block in a subframe between subframe n and subframe n+k.
20. The method of claim 11 , further comprising transmitting to the wireless device a control channel in subframes from subframe n to subframe n+k.