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Method and transmitting/receiving equipment for group retransmission in mobile communication system

A technology of a mobile communication system and a receiving device, applied in the field of W-CDMA mobile communication system, can solve problems such as inability to play an effective role

Inactive Publication Date: 2003-07-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] Although it has the advantage of improving system performance, simply combining the above technologies into various systems does not work effectively

Method used

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  • Method and transmitting/receiving equipment for group retransmission in mobile communication system
  • Method and transmitting/receiving equipment for group retransmission in mobile communication system
  • Method and transmitting/receiving equipment for group retransmission in mobile communication system

Examples

Experimental program
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Effect test

no. 1 example

[0058] The first embodiment: SMP+BIR

[0059] Figure 4 It is a block diagram of a sending device in a CDMA mobile communication system according to an embodiment of the present invention. refer to Figure 4 , the sending device includes a CRC (Cyclic Redundancy Check, cyclic redundancy check) adder 210, a channel encoder 220, a rate matching controller 230, a distributor 240, an interleaving unit 250, a switch 260, and a parallel-to-serial converter (PSC) 270 , bit inverter 280, modulator 290 and transmit controller 200.

[0060] The sending device swaps the systematic and parity bits when retransmitting, if necessary. Therefore, switch 260 is optional.

[0061] refer to Figure 4 , the CRC adder 210 adds CRC bits to the input bits for error checking according to the packet data. The channel encoder 220 encodes the coded bits with CRC bits according to the coding rate determined by the predetermined coding method.

[0062] Packet data is encoded into systematic bits an...

no. 2 example

[0120] The second embodiment: SRRC+BIR

[0121] Figure 10 is a block diagram of a sending device in a CDMA mobile communication system according to another embodiment of the present invention. refer to Figure 10 , the sending device includes a CRC adder 610 , a channel encoder 620 , a rate matching controller 630 , an interleaver 640 , a bit rearranger 650 , a bit inverter 660 , a modulator 670 , and a sending controller 600 . The sending device shifts the retransmitted bits according to a predetermined number of bits, and inverts the shifted bits according to the retransmitted sequence number.

[0122] refer to Figure 10 , the CRC adder 610 adds CRC bits to the input bits for error checking on the basis of the packet data. The channel encoder 620 encodes the packet data with CRC at a predetermined coding rate according to a predetermined coding method.

[0123] Packet data is encoded into systematic bits and parity bits for systematic bit error control. Either turbo ...

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PUM

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Abstract

A transmitting / receiving apparatus and method for packet retransmission in a mobile communication system. Upon request for a retransmission from a receiver, a transmitter generates first coded bits by inverting initially transmitted coded bits, generates second coded bits by separating the initially transmitted coded bits into a first bit group having a relatively high priority and a second bit group having a relatively low priority and exchanging the first bit group with the second bit group, and generates third coded bits by inverting the exchanged coded bits. The transmitter selects one of the first coded bits, the second coded bits according to the sequence number of a retransmission request received from the receiver, and the third coded bits and maps the selected coded bits to modulation symbols. The transmitter then transmits the modulation symbols to the receiver.

Description

[0001] priority statement [0002] This application claims priority to the application with serial number No. 2001-67694 and titled "Method and sending / receiving device for packet retransmission in mobile communication system" filed with the Korean Industrial Property Office on Oct. 31, 2001 rights, the contents of which application are incorporated herein by reference. field of invention [0003] The present invention relates to a W-CDMA (Wide-band Code Division Multiple Access, wideband code division multiple access) mobile communication system, in particular to a transmission method used to reduce the transmission bit error rate during retransmission, thereby improving decoding performance / receiving equipment and methods. Background technique [0004] In mobile communication systems, adverse effects on high-speed, high-quality data services are attributed to the channel environment. Due to white noise and signal power changes caused by fading, shadows, Doppler effect c...

Claims

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Application Information

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IPC IPC(8): H04J13/00H04J13/10H04L1/00H04L1/08H04L1/18
CPCH04L1/0066H04L1/1887H04L1/1819H04L1/0069H04L1/1893H04L1/0003H04L1/08H03M13/01H04J13/16
Inventor 金鲁善崔镇圭文庸石金宪基尹在升
Owner SAMSUNG ELECTRONICS CO LTD
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