# US 7,609,680 B2 · HARQ device and method for mobile communication system

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- Number: US 7,609,680 B2
- Document ID: US7609680B2
- Status: Granted
- Kind: B2
- Application number: 11/209,220
- Filed: 2005-08-23
- Published: 2005-12-29
- Granted: 2009-10-27
- Earliest claimed: 2000-10-21
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Min-Koo Kim
- Web page: https://patentgrep.com/patent/US7609680B2

## CPC

- H04L 1/0066: {Parallel concatenated codes}
- H03M 13/35: Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
- H03M 13/6306: {Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy (H03M13/3761, H03M13/3769 and H03M13/635 take precedence)}
- H04L 1/0069: {Puncturing patterns}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1845: {Combining techniques, e.g. code combining}
- H04L 1/1887: {Scheduling and prioritising arrangements}
- H04L 1/1809: Selective-repeat protocols
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)

## Abstract

There is provided a device and method for retransmitting error-detected data in a mobile communication system. A transmitter generates S sub-codes Ci (i=0, 1, 2, . . . , S−1) from a physical layer packet (PLP) information stream using quasi-complementary turbo codes, initially transmits the first sub-code C0, and then sequentially transmits the following sub-codes each time a retransmission request is received for the initial transmission or a previous retransmission. Upon receipt of a retransmission request for the last sub-code CS−1, the transmitter transmits the first sub-code C0 and then sequentially transmits the following sub-codes each time a retransmission request is received.

## Claims

### Claim 1

A CDMA (Code Division Multiple Access) mobile communication system comprising:
a transmitter including a sub-code generator that generates S sub-codes Ci (i=0, 1, 2, . . . , S−1) from a PLP (Physical Layer Packet) information stream using quasi-complementary turbo codes, for sequentially transmitting the S sub-codes for initial transmission, and after the initial transmission and upon receipt of retransmission requests, retransmitting the S sub-codes; and
a receiver for performing diversity combining on same sub-codes among the sub-codes sequentially received from the transmitter and then performing code combining on the received sub-codes.