| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a data communication system which can conduct error control for packet missing in cable line section, without degrading communication efficiency. SOLUTION: This system is equipped with a mobile terminal communication control means 12, which provides an higher one in the communication order with connection control data and data communication interface selection between the termination of a communication terminal device 1 and between the termination of a server terminal device 3, on the occasion of data communication between the communication terminal device 1 and the server terminal device 3, that are respectively connected to a relay device 2 by a radio communication line 4 and a cable communication line 5, error control means 13 and 22, which conduct error control for communication data between the communication terminal device 1 and the relay device 2, a communication control relay means 21, which conducts communication packet conversion according to the difference in communication protocols between the communication terminal device 1 and the server terminal device 3, and protocol processing means 24 and 32, which have a data communication function accompanied with an error control between the transit device 2 and the server terminal device 3.</p> |
