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Method of performing uplink synchronization in wireless communication system

  • US 9,049,655 B2
  • Filed: 10/22/2013
  • Issued: 06/02/2015
  • Est. Priority Date: 06/18/2007
  • Status: Active Grant
First Claim
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1. A method of performing uplink synchronization in a wireless communication system, the method comprising:

  • transmitting, by a user equipment (UE), a random access preamble;

    receiving, by the UE, a random access response, the random access response comprising a random access preamble identifier corresponding to the random access preamble;

    starting, by the UE, a time alignment timer after receiving the random access response; and

    stopping, by the UE, the time alignment timer when contention resolution is not successful.

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