Activation of a secondary cells of primary and secondary control channel groups

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:
• transmit, to a wireless device, configuration parameters of a cells grouped into:
• a primary control channel group comprising a secondary cell;
• and
• a secondary control channel group comprising a control channel secondary cell with a secondary control channel;
• transmit, during a first subframe, a first indication to activate the secondary cell and the control channel secondary cell;
• start reception of channel state information of the secondary cell of the primary control channel group from a second subframe that is eight subframes after the first subframe;
• and
• start reception of channel state information of the control channel 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 control channel secondary cell.

A system comprising:

• a wireless device;
• and
• 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:
• transmit, to the wireless device, configuration parameters of a cells grouped into:
• a primary control channel group comprising a secondary cell;
• and
• a secondary control channel group comprising a control channel secondary cell with a secondary control channel;
• transmit, during a first subframe, a first indication to activate the secondary cell and the control channel secondary cell;
• start reception of channel state information of the secondary cell of the primary control channel group from a second subframe that is eight subframes after the first subframe;
• and
• start reception of channel state information of the control channel 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 control channel secondary cell.