# US 8,788,903 B2 · Wireless transmission device, wireless receiving device, and method for transmitting encoded data

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- Number: US 8,788,903 B2
- Document ID: US8788903B2
- Status: Granted
- Kind: B2
- Application number: 13/123,860
- Filed: 2009-10-22
- Published: 2011-08-11
- Granted: 2014-07-22
- Earliest claimed: 2008-10-23
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Takaaki Kishigami; Isamu Yoshii
- Inventors: Takaaki Kishigami; Isamu Yoshii
- Web page: https://patentgrep.com/patent/US8788903B2

## CPC

- H03M 13/09: Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
- H03M 13/2906: {using block codes (H03M13/2957 takes precedence)}
- H03M 13/293: {with erasure setting}
- H03M 13/356: {Unequal error protection [UEP]}
- H03M 13/373: {with erasure correction and erasure determination, e.g. for packet loss recovery or setting of erasures for the decoding of Reed-Solomon codes}
- H03M 13/6356: {by repetition or insertion of dummy data, i.e. rate reduction}
- H03M 13/6362: {by puncturing}
- H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)}
- H04L 1/0042: {Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence)}
- H04L 1/0053: {specially adapted for power saving}
- H04L 1/0061: {Error detection codes}
- H04L 5/003: {Arrangements for allocating sub-channels of the transmission path}
- H03M 13/1102: {Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes}
- H03M 13/15: Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes (H03M13/17 takes precedence)
- H03M 13/1515: {Reed-Solomon codes}
- H04L 1/0026: {Transmission of channel quality indication}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Disclosed are a wireless transmission device, wireless receiving device, and method for transmitting encoded data with which power consumption can be reduced at the receiving end in accordance with reception conditions, while resource-saving is maintained by employing an erasure correcting code (ECC). In a wireless communication device (100), an erasure correction encoding unit (110) performs erasure correction encoding (ECC) of the transmission data and an error correction encoding unit (145) performs encoding, using an error correction encoding system other than the erasure correction encoding, of other copied transmission data from the transmission data and the ECC parity bits obtained by the erasure correction encoding unit (110), respectively independently, and a transmission unit (165) in the error correction encoding unit (145) transmits as information bits only systematic bits obtained from the other transmission data and, in the error correction encoding unit (145), transmits as parity bits the encoding results obtained from the other transmission data and ECC parity bits.

## Claims

### Claim 1

A radio transmission apparatus comprising:
a first encoding section that first-encodes transmission data using a first encoding method and outputs first-encoded data;
a first padding section that adjusts size of the transmission data for first-encoding of the first encoding section by zero padding;
a second encoding section that second-encodes the first-encoded data using a second encoding method, and second-encodes the transmission data using the second encoding method independently of the second-encoding of the first-encoded data, and outputs second-encoded data;
a second padding section that adjusts size of the transmission data for second-encoding of the second encoding section by zero padding, the size of zero padding of the second padding section being same as that of the first padding section; and
a transmission section that transmits the second-encoded data,
wherein a coding unit length in the first encoding section is a natural number multiple of a coding unit length in the second encoding section.

### Claim 2 (depends on 1)

The radio transmission apparatus according to claim 1, wherein an erasure correction coding is used as the first encoding method.

### Claim 3 (depends on 1)

The radio transmission apparatus according to claim 1, wherein a systematic code is used as the first encoding method and the second encoding method.

### Claim 4 (depends on 3)

The radio transmission apparatus according to claim 3, wherein the first-encoded data is parity bits subjected to systematic encoding bit data.

### Claim 5 (depends on 1)

The radio transmission apparatus according to claim 1, wherein a coding unit length in the first encoding section is greater than a coding unit length in the second encoding section.

### Claim 6 (depends on 1)

The radio transmission apparatus according to claim 1, further comprising a control information generation section that generates control information comprising first resource allocation information, second resource allocation information and identification information that associates the first resource with the second resource, wherein the transmission section allocates data corresponding to the transmission data included in the second-encoded data to the first resource and allocates data corresponding to the first-encoded data included in the second-encoded data to the second resource and transmits the allocated data.

### Claim 7 (depends on 1)

The radio transmission apparatus according to claim 1, wherein the allocation information of the second resource includes a coding rate of the first encoding section and a coding rate of the second encoding section.

### Claim 8 (depends on 1)

The radio transmission apparatus according to claim 1, further comprising a suppressing section that suppresses a coding by the first encoding section, a coding of the first-encoded data by the second encoding section and a transmission of data corresponding to the first-encoded data in the second-encoded data, according to the data size of the transmission data.

### Claim 9 (depends on 1)

The radio transmission apparatus according to claim 1, further comprising a combining section that combines the transmission data with subsequent transmission data according to the data size of the transmission data, wherein the first encoding section and the second encoding section encode the combined transmission data.

### Claim 10

An encoded data transmission method comprising:
first-encoding transmission data using a first encoding method and outputting the first-encoded data;
first padding that adjusts size of the transmission data for the first-encoding by zero padding;
second-encoding the first-encoded data using a second encoding method, and second-encoding the transmission data using the second encoding method independently of the second-encoding of the first-encoded data, and outputting second-encoded data;
second padding that adjusts size of the transmission data for the second-encoding by zero padding, the size of zero padding of the second padding being same as that of the first padding; and
transmitting the second-encoded data,
wherein a coding unit length in the first-encoding is a natural number multiple of a coding unit length in the second-encoding.

### Claim 11

A radio reception apparatus comprising:
a reception section that receives first data, which is generated by first-encoding transmission data using a first encoding method, first padding that adjusts size of the transmission data for the first-encoding by zero padding, and second-encoding the first-encoded transmission data using a second encoding method, and second data, which is generated by second-encoding the transmission data using the second encoding method independently of the second-encoding of the first-encoded transmission data and second padding that adjusts size of the transmission data for the second-encoding by zero padding, wherein a coding unit length in the first-encoding is a natural number multiple of a coding unit length in the second-encoding, and the size of zero padding of the first padding is same as that of the second padding;
a first decoding processing section that decodes the second data;
an error detection section that performs error detection of the decoding result in the first decoding processing section;
a deciding section that decides whether second decoding processing is necessary based on a condition of the error detection; and
a second decoding section that decodes, when the decision result is that the second decoding processing is necessary, the first data using the second decoding processing.

### Claim 12 (depends on 11)

The radio reception apparatus according to claim 11, wherein the deciding section stops, when the error detection section detects no error, the second decoding processing by the second decoding section and performs, when the error detection section detects an error, the second decoding processing by the second decoding section.

### Claim 13 (depends on 11)

The radio reception apparatus according to claim 11, further comprising a third decoding processing section that performs a decoding processing using both the decoding result of the first decoding processing section and the decoding result of the second decoding processing section.

### Claim 14 (depends on 13)

The radio reception apparatus according to claim 13, wherein the third decoding processing section performs an erasure correction decoding processing.

### Claim 15

An encoded data reception method comprising:
receiving first data, which is generated by first-encoding transmission data using a first encoding method, first padding that adjusts size of the transmission data for the first-encoding by zero padding, and second-encoding the first-encoded transmission data using a second encoding method, and second data which is generated by second-encoding the transmission data using the second encoding method independently of the second-encoding of the first-encoded transmission data and second padding that adjusts size of the transmission data for the second-encoding by zero padding, wherein a coding unit length in the first-encoding is a natural number multiple of a coding unit length in the second-encoding, and the size of zero padding of the first padding is same as that of the second padding;
decoding the second data;
performing error detection of the decoded second data;
deciding whether second decoding processing is necessary based on a condition of the error detection; and
decoding, when the decision result is that the second decoding processing is necessary, the first data using the second decoding processing.