Apparatus and method for retransmitting high-speed data in a CDMA mobile communication system
First Claim
1. A method for data transmission in a mobile communication system, the method comprising the steps of:
- determining a modulation mode among a plurality of modulation modes;
distributing coded bits into systematic bits and parity bits;
if the determined modulation mode is different from a modulation mode at initial transmission, selecting coded bits to transmit among the systematic bits and the parity bits at the initial transmission in response to the determined modulation mode,modulating the selected coded bits into modulation symbols according to the determined modulation mode; and
transmitting the modulated symbols.
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Accused Products
Abstract
An apparatus for retransmitting data at a retransmission request from a receiver by a transmitter in a CDMA mobile communication system including a turbo encoder with a given coding rate and initially transmitting systematic bits and parity bits obtained by encoding the data by the turbo encoder using one modulation mode among a plurality of modulation modes. A controller determines a modulation mode to be used between the transmitter and the receiver in response to the retransmission request. A distributor distributes coded bits obtained by encoding the data at the coding rate into systematic bits and parity bits. A selector selects coded bits transmittable by the determined modulation mode among the systematic bits and the parity bits at the initial transmission, if the determined modulation mode is different from the modulation mode used at initial transmission. A modulator modulates the transmittable coded bits into modulated symbols according to the determined modulation mode.
49 Citations
30 Claims
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1. A method for data transmission in a mobile communication system, the method comprising the steps of:
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determining a modulation mode among a plurality of modulation modes; distributing coded bits into systematic bits and parity bits; if the determined modulation mode is different from a modulation mode at initial transmission, selecting coded bits to transmit among the systematic bits and the parity bits at the initial transmission in response to the determined modulation mode, modulating the selected coded bits into modulation symbols according to the determined modulation mode; and transmitting the modulated symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for data transmission in a mobile communication system;
- the apparatus comprising;
a controller for determining a modulation mode among a plurality of modulation modes; a distributor for distributing coded bits into systematic bits and parity bits; a selector for selecting coded bits to transmit by the determined modulation mode among the systematic bits and the parity bits at the initial transmission, if the determined modulation mode is different from the modulation mode at initial transmission; and a modulator for modulating the selected coded bits into modulated symbols according to the determined modulation mode. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- the apparatus comprising;
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15. A method for receiving transmission data in a mobile communication system, the method comprising the steps of:
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receiving modulation mode information; demodulating modulated symbols according to a demodulation mode corresponding to the modulation mode information and outputting coded bits; distributing the coded bits into systematic bits and parity bits; combining the systematic bits with previously received systematic bits, and combining the parity bits with previously received parity bits; and decoding the combined systematic bits and the combined parity bits into information bits. - View Dependent Claims (16, 17, 18, 19, 20, 21, 29)
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22. An apparatus for receiving retransmission data in a mobile communication system, the apparatus comprising:
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a demodulator for demodulating modulated symbols according to a demodulation mode and outputting coded bits; a distributor for distributing the coded bits into systematic bits; a combiner for combining the systematic bits with previously received systematic bits, and combining the parity bits with previously received parity bits; and a decoder for decoding the combined systematic bits and the combined parity bits into information bits. - View Dependent Claims (23, 24, 25, 26, 27, 28, 30)
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Specification