Patent ID: 8526389

Claim:
A method comprising: a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device: i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising: (1) a primary cell group comprising a first subset of said plurality of cells, said subset comprising said primary cell; and (2) a secondary cell group comprising a second subset of said at least one secondary cell; b) receiving, by said wireless device, a control command for transmission of a random access preamble on a first cell in said plurality of cells, said random access preamble transmitted in parallel with at least one of the following parallel uplink transmissions: i) a first control packet on an uplink control channel of said primary cell; ii) a second packet comprising uplink control information on an uplink data channel of one of said plurality of cells; and iii) at least one third packet on at least one uplink data channel of said plurality of cells; c) determining, by said wireless device, a preamble transmission power for said random access preamble; and d) if a total calculated transmission power exceeds a predefined value, said wireless device obtaining transmission power of said at least one parallel uplink transmission according to the following priorities: i) said random access preamble transmission having a first priority; ii) said first control packet having a second priority lower than said first priority; iii) said second packet having a third priority lower than said second priority; and iv) said at least one third packet having a fourth priority lower than said third priority; and wherein said priorities are employed by said wireless device to reduce or scale linear transmission power of one or more of said at least one parallel transmission such that an updated value of said total calculated transmission power is equal to or less than said predefined value.