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Random Access with Primary and Secondary Component Carrier Communications

  • US 20130010711A1
  • Filed: 03/09/2012
  • Published: 01/10/2013
  • Est. Priority Date: 07/06/2011
  • Status: Abandoned Application
First Claim
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1. A method in a user equipment, UE, communicating with a radio base station on a primary cell associated with a first frequency and at least one secondary cell associated with a second frequency different from the first frequency, the method comprising:

  • transmitting a preamble on a random access channel, RACH, to the radio base station on the secondary cell;

    receiving a random access response message from the radio base station on a different cell than the UE transmitted its preamble on, said random access response message including timing advance information for an uplink transmission by the UE and including a cell identifier to determine the secondary cell that the control information in the random access response message refers to; and

    transmitting to the radio base station based on the timing advance information in the random access response message.

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