INFORMATION SERVICE SYSTEM, INFORMATION SERVER, PORTABLE TERMINAL, INFORMATION SERVICE CONTROL PROGRAM AND PORTABLE TERMINAL CONTROL PROGRAM

摘要

An information supply system in which in response to a request for information from a portable terminal (20) connected through a network (50), an information supply server (10) supplies the portable terminal (20) with the requested information, which system collates information requested by the portable terminal (20) with transmitted information which is held in the information supply server (10) to determine whether the information requested by the portable terminal (20) is already transmitted or not, thereby suppressing re-transmission of the information.