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MOBILE COMMUNICATION SYSTEM, RADIO BASE STATION, AND MOBILE STATION

  • US 20120327924A1
  • Filed: 01/07/2011
  • Published: 12/27/2012
  • Est. Priority Date: 01/08/2010
  • Status: Active Grant
First Claim
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1. A mobile communication system having a mobile station configured to transmit an uplink signal to a radio base station by using a plurality of carriers having different carrier frequencies, comprising:

  • a timer management unit configured to manage the timer corresponding to the plurality of carriers; and

    a state management unit configured to manage the state of the plurality of carriers, whereinthe state management unit is configured to set the state of a carrier, whose timer has expired, to an asynchronous state, andthe mobile station is configured to transmit a random access signal in the carrier, when the carrier specified by a scheduling signal or a synchronization request signal received from the radio base station is in an asynchronous state.

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