Patent ID: 6308063
Filing Date: 2001-10-23
Classification: H04L,H04Q,H04W

Abstract:
A mobile communication system which comprises:a base station having a data transmission connection to a mobile services switching centre through a transcoder unit, wherein the base station transmits and, correspondingly, receives speech parameters over a radio connection from a mobile station located within its radio coverage area,the transcoder unit decodes the speech parameters it has received from the base station to speech signals to be transmitted to the mobile services switching centre and, correspondingly, for encoding the speech signals it has received from the mobile services switching centre to speech parameters to be transmitted to the base station,a circuit-switched data transmission connection for the base station and the transcoder unit to communicate with one another, on which data transmission connection the speech parameters are transmitted by TRAU frames, whereinthe data transmission connection between the base station and the transcoder unit is partly composed of a packet-switched data transmission connection, anda converter is arranged on the data transmission connection between the base station and the transcoder unit, the converter converting a TRAU frame received from said circuit-switched data transmission connection into a packet which is to be transmitted over the packet-switched connection, said conversion including a removal of bits which are included in the TRAU frame and not needed on the packet-switched connection.