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METHOD FOR RE-ATTEMPTING A RANDOM ACCESS EFFECTIVELY

  • US 20100142470A1
  • Filed: 08/07/2008
  • Published: 06/10/2010
  • Est. Priority Date: 08/10/2007
  • Status: Active Grant
First Claim
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1. A method of transmitting an uplink data in wireless communication system, the method comprising:

  • transmitting a first random access preamble;

    receiving a random access response in response to the first random access preamble, wherein the random access response including a radio resource allocation information;

    transmitting the uplink data to a network using the radio resource allocation information and starting a contention resolution timer, wherein the uplink data is transmitted using a HARQ (Hybrid Automatic Repeat request);

    retransmitting the uplink data if a positive acknowledgment corresponding to the HARQ transmission is not received from the network;

    determining whether or not a number of the uplink data transmissions equals to a maximum number of HARQ transmissions; and

    transmitting a second random access preamble to the network before the contention resolution timer is expired, if the number of the uplink data transmissions is determined to be equal to or larger than the maximum number of HARQ transmissions.

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