APPARATUS AND METHOD FOR COMMUNICATING PACKET DATA CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM
First Claim
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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Accused Products
Abstract
A base station transmission apparatus for transmitting MAC (Medium Access Control) ID (Identification) information indicating a terminal to receive transmission packet data and length information of the transmission packet data in a mobile communication system for high-speed packet transmission, having an encoder for encoding a bit stream indicating the MAC ID information and generating coded symbols; a Walsh cover section for Walsh-covering the coded symbols from the encoder with a Walsh code based on the length information; and a Walsh spreader for spreading the Walsh-covered symbols from the Walsh cover section with a predetermined Walsh code.
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Citations
11 Claims
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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:
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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. - View Dependent Claims (2, 3)
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4. A terminal reception method in a mobile communication system for high-speed packet transmission, comprising the steps of:
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despreading a signal of a packet data control channel for receiving MAC (Medium Access Control) ID (Identification) information indicating a terminal to receive packet data and receiving length information of the packet data, using a predetermined Walsh code, and generating symbols;
measuring energy of the generated symbols, and generating a packet data control detection signal when the measured energy value is greater than a threshold;
extracting a Walsh code having a peak value by performing inverse fast Hadamard transform on the generated symbols using a Walsh code based on the length information in response to the packet data control detection signal, and generating the length information according to the extracted Walsh code;
Walsh-decovering the generated symbols with the extracted Walsh code; and
generating the MAC ID information by decoding the Walsh-decovered symbols. - View Dependent Claims (5)
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6. A terminal reception method in a mobile communication system for high-speed packet transmission, comprising the steps of:
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despreading signals received through an I channel and a Q channel with a Walsh code based on previously assigned MAC (Medium Access Control) ID (Identification) information, and generating symbols;
selecting symbols on the I channel or symbols on the Q channel according to the MAC ID information;
measuring energy of the selected symbols and generating a packet data control detection signal when the measured energy value is greater than a threshold; and
generating length information of the packet data by decoding the symbols depending on the packet data control detection signal when the packet data is inputted to the terminal. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification