H04740/00(2009.01) of a random access preamble on a first cell if the base station H047
72/00(2009.01) determines radio resources of the first cell are required for …

A wireless device receives a control message configuring cell groups comprising a primary
cell group and a secondary cell group. The wireless device receives a timing advance …

H04W 74/08(2009.01) random access preamble on random access resources of a
H04752/36(2009.01) secondary cell in a secondary cell group. The wireless device H04L …

A wireless device receives a control command to transmit a random access preamble on a
first secondary cell. The wireless device repeatedly transmits the random access preamble …

A wireless device receives a control command for transmission of a random access
preamble on a first cell. The wireless device transmits the random access preamble in …

(57) ABSTRACT A wireless device transmits a first signal in a first cell group and transmits a
second signal in a second cell group. The wireless device adjusts a signal transmission …

A serving base station transmits, in response to making a handover decision for a wireless
device, a first message to a target base station. The serving base station receives from the …

Assistant Examiner—Albert Shih 17, 2012, provisional application No. 61/661,329,(74)
Attorney, Agent, or Firm—Esmael Dinan; David filed on Jun. 18, 2012, provisional …

(57) ABSTRACT A wireless device transmits a first packet in subframe n of a first cell of a first
cell group and transmits a second packet in Subframe n+ 1 of a second cell of a second cell …

A wireless device receives a control message configuring cell groups comprising a primary
cell group and a secondary cell group. The wireless device receives a control command …