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APPARATUS AND METHOD FOR COMMUNICATING PACKET DATA CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM

  • US 20080043683A1
  • Filed: 10/24/2007
  • Published: 02/21/2008
  • Est. Priority Date: 03/10/2001
  • Status: Active Grant
First Claim
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1. A terminal reception apparatus for receiving MAC (Medium Access Control) ID (Identification) information indicating a terminal to receive packet data transmitted by a base station and length information of the packet data in a mobile communication system for high-speed packet transmission, comprising:

  • a despreader for extracting symbols of a packet data control channel over which the MAC ID information and the length information are transmitted, by despreading a received signal with a Walsh code;

    an energy detector for measuring energy of symbols output from the despreader and generating a packet data control detection signal when the measured energy value is greater than a threshold;

    a length information generator operable in response to the packet data control detection signal, for extracting a Walsh code having a peak value by performing inverse fast Hadamard transform on the symbols from the despreader using a determined Walsh code based on the length information, and generating the length information according to the extracted Walsh code;

    a Walsh decover section for Walsh-decovering the symbols from the despreader with the extracted Walsh code; and

    a decoder for generating the MAC ID information by decoding symbols from the Walsh decover section.

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