Patent ID: 9642164
Date: 2017-05-02
CPC Classifications: H04W

Claim:
1. A mobile station comprising: a detection unit configured to detect a start trigger of a random access procedure in a second cell; and a transmission unit configured to postpone transmission of a random access preamble in the second cell when: wherein the transmission unit performs the postponed transmission of the random access preamble in the second cell after completing the transmission of the uplink signal in the first cell, wherein the transmission unit cancels the transmission of the random access preamble in the second cell when a predetermined period elapses from the postponing of the transmission of the random access preamble, and the transmission unit postpones the transmission of the random access preamble in the second cell when the mobile station is in the connected state in the first cell; detects the start trigger for the random access procedure in the second cell; determines that the uplink signal is being transmitted in the first cell; and is unable to secure a predetermined amount of electric power, wherein the predetermined amount of electric power is more than an amount of electric power required for transmission of the random access preamble and the uplink signal.