COMMUNICATION SYSTEM, USER TERMINAL, POSITION MANAGEMENT DEVICE, AND COMMUNICATION CONTROL METHOD

摘要

A user terminal (3) transmits at least identification information for another user terminal, and identification information that identifies user terminals and is stored in the user terminal (3), to a position management device (8), when there is no response from the other user terminal after the user terminal (3) calls the other user terminal. The position management device receives at least the identification information for the other terminal that was transmitted by the calling user terminal, and the identification information that identifies user terminals and is stored in the calling user terminal. Then, the position management device determines a forwarding destination for the call to be a user terminal from which the distance to the other user terminal is shorter than a threshold, from among the user terminals corresponding to the identification information stored in the calling user terminal, on the basis of the association between the position information and identification information of a plurality of user terminals, and the identification information for the other terminal and the identification information stored in the calling user terminal.