Transmission rate judgment method and apparatus

Claim 2

A transmission rate judgment method which measures the level of a received symbol and determines the priority order of the transmission rate in decoding the received symbol from this measured level.

Claim 3

A transmission rate judgment apparatus, comprising symbol repetition number counting means for counting the number of received symbol repetitions and rate determination means for determining the priority order of the transmission rate in decoding the received symbol based on said symbol repetition count.

Claim 4

The transmission rate judgment apparatus according to claim 3, wherein said rate determination means determines the priority order of the transmission rate based on the repetition count of the received symbol and determines the transmission rate used for decoding according to this priority order.

Claim 5

A transmission rate judgment apparatus, comprising reception level measuring means for measuring the level of a received symbol and rate determination means for determining the priority order of the transmission rate in decoding the received symbol based on said level.

Claim 6

The transmission rate judgment apparatus according to claim 5, wherein the rate determination means determines the priority order of the transmission rate based on the level of the received symbol and determines the transmission rate used for decoding according to this priority order.

Claim 7

A reception apparatus, comprising the transmission rate judgment apparatus according to claim 3 or claim 4, quality judgment means for judging the quality of decoded data and output means for outputting the judgment result of this quality judgment means.

Claim 8

A reception apparatus, comprising the transmission rate judgment apparatus according to claim 5 or claim 6, quality judgment means for judging the quality of decoded data and output means for outputting the judgment result of this quality judgment means.

Claim 9

The reception apparatus according to claim 7 or claim 8, comprising derepeating means for combining the received symbol in the repetition count corresponding to the specified rate, Viterbi decoding means for carrying out Viterbi decoding on the output of said derepeating means, CRC checking means for carrying out a CRC check on the output of said Viterbi decoding means, convolutional coding means for carrying out convolutional coding on the output of said Viterbi decoding means, symbol error number counting means for counting the number of symbol errors from the output of said derepeating means and the output of said convolutional coding means, and rate judgment means for judging the transmission rate based on the CRC check result which is the output of said CRC checking means, the quality information in said Viterbi decoding means and the number of symbol errors which is the output of said symbol error number counting means.

Claim 10

A mobile communication terminal apparatus which comprises the reception apparatus according to any of claim 7 to claim 9 and carries out radio communications with a base station apparatus.

Claim 11

A mobile communication base station apparatus which comprises the reception apparatus according to any of claim 7 to claim 9 and carries out radio communications with a mobile communication terminal apparatus.

Claim 12

A communication system, comprising the mobile communication terminal apparatus according to claim 10 and the mobile communication base station apparatus according to claim 11.

Claim 13

A decoding method which counts the number of received symbol repetitions, determines the priority order of the transmission rate in decoding the received symbol based on this symbol repetition count and decodes the received symbol at this determined transmission rate.

Claim 14

A decoding method which measures the level of a received symbol, determines the priority order of the transmission rate in decoding the received symbol based on this measured level and decodes the received symbol at this determined transmission rate.