MOBILE COMMUNICATION SYSTEM, AND ITS METHOD FOR CONFIRMING DATA TRANSMITTANCE TO WIRED SYSTEM PUBLIC ELECTRIC COMMUNICATION NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a method for confirming transmittance of transmitted data between different communication systems. SOLUTION: A mobile data terminal 13 transmits data addressed to a destination terminal contained in a wired system public electric communication network 21 to a mobile wireless exchange 11 via a wireless base station 12. The mobile wireless exchange 11 executes data transmission by a transmission procedure with the wired system public electric communication network 21 to receive a connection reply/non- reply, connection end signal or the like with respect to the success/failure of the data transmission. The mobile wireless exchange 11 respectively generates a data acknowledgement (ACK) signal denoting that the transmission data are normally sent to the destination terminal when receiving the connection end signal after receiving the connection reply signal or a data non acknowledgement (NACK) signal denoting that the transmission data are not normally sent to the destination terminal when receiving a connection non reply signal and transmits the generated ACK/NACK signal to the mobile terminal. The mobile terminal displays the success/failure of the data transmission based on the ACK/NACK signal.