Patent ID: 7420948

Claim:
A data transmission method in a digital cellular radio network, wherein information is transferred between network elements of the digital cellular radio network, the method comprising: increasing the data rate of transmission by channel coding the information to be transferred, the channel coding comprising grouping bits to be transmitted in blocks having a minimum size of 288 bits; carrying out convolutional coding for said blocks with a code rate of ½ by using GSM convolutional coding polynomes; puncturing the coded bits obtained, the puncturing including deleting bits from each block so that said each block contains no more than 456 bits; transferring the information to be transmitted in a transfer system by generating a transcoding frame having a plurality of data octets, the first two data octets forming a synchronization pattern that consists of zeros, and said transcoding frame containing control bits and at least 288 bits of information to be transmitted; and calculating a short checksum for some of the data octets used for transferring the information to be transmitted, transferring a cyclic redundancy check value obtained by using the spare control bits, and employing the cyclic redundancy check value in synchronizing of the transcoding frame.