A method performed by a base station (401, 503, 504), comprising: transmitting, to a wireless device (406, 502), at least one control message comprising: configuration parameters of a plurality of cells, wherein the plurality of cells comprise a primary cell and a plurality of secondary cells, and wherein the plurality of cells are grouped into a plurality of cell groups comprising: a primary cell group comprising a first subset of the plurality of cells, the first subset comprising the primary cell; and a secondary cell group comprising a second subset of the plurality of secondary cells; and a plurality of common parameters, wherein the plurality of common parameters comprise the following parameters for each of a first plurality of secondary cells of the secondary cell group and at least one secondary cell in the primary cell group: a plurality of random access resource parameters; and a plurality of power control parameters for random access preamble transmission; and receiving, from the wireless device (406, 502), radio quality of the plurality of cells; selecting, based on the radio quality, a random access channel associated with a secondary cell of the plurality of secondary cells; and transmitting, to the wireless device (406, 502), a control command to cause transmission of a first random access preamble via the secondary cell, wherein the control command is: configured to cause transmission of a first random access preamble via a secondary cell of the secondary cell group; and configured not to trigger transmission of a second random access preamble via any secondary cell of the primary cell group. transmitting, to a wireless device (406, 502), at least one control message comprising: configuration parameters of a plurality of cells, wherein the plurality of cells comprise a primary cell and a plurality of secondary cells, and wherein the plurality of cells are grouped into a plurality of cell groups comprising: a primary cell group comprising a first subset of the plurality of cells, the first subset comprising the primary cell; and a secondary cell group comprising a second subset of the plurality of secondary cells; and a plurality of common parameters, wherein the plurality of common parameters comprise the following parameters for each of a first plurality of secondary cells of the secondary cell group and at least one secondary cell in the primary cell group: a plurality of random access resource parameters; and a plurality of power control parameters for random access preamble transmission; and configuration parameters of a plurality of cells, wherein the plurality of cells comprise a primary cell and a plurality of secondary cells, and wherein the plurality of cells are grouped into a plurality of cell groups comprising: a primary cell group comprising a first subset of the plurality of cells, the first subset comprising the primary cell; and a secondary cell group comprising a second subset of the plurality of secondary cells; and a primary cell group comprising a first subset of the plurality of cells, the first subset comprising the primary cell; and a secondary cell group comprising a second subset of the plurality of secondary cells; and a plurality of common parameters, wherein the plurality of common parameters comprise the following parameters for each of a first plurality of secondary cells of the secondary cell group and at least one secondary cell in the primary cell group: a plurality of random access resource parameters; and a plurality of power control parameters for random access preamble transmission; and a plurality of random access resource parameters; and a plurality of power control parameters for random access preamble transmission; and receiving, from the wireless device (406, 502), radio quality of the plurality of cells; selecting, based on the radio quality, a random access channel associated with a secondary cell of the plurality of secondary cells; and transmitting, to the wireless device (406, 502), a control command to cause transmission of a first random access preamble via the secondary cell, wherein the control command is: configured to cause transmission of a first random access preamble via a secondary cell of the secondary cell group; and configured not to trigger transmission of a second random access preamble via any secondary cell of the primary cell group. configured to cause transmission of a first random access preamble via a secondary cell of the secondary cell group; and configured not to trigger transmission of a second random access preamble via any secondary cell of the primary cell group.