Patent ID: 8805411

Claim:
A service provision system comprising: a portable terminal including a terminal-side position detector to detect a first position based on a global positioning system (GPS) signal received from GPS Satellites; an in-vehicle apparatus mounted to a vehicle, the in-vehicle apparatus including a vehicle-side position detector to detect a second position based on a GPS signal received from GPS Satellites; and a server to receive position information from the portable terminal, determine service information in response to the position information received, and transmit the service information to the portable terminal, the portable terminal acquiring the second position detected by the vehicle-side position detector from the in-vehicle apparatus and transmitting the second position as the position information to the server when the portable terminal communicates with the in-vehicle apparatus, the portable terminal transmitting the first position detected by the terminal-side position detector as the position information to the server when the portable terminal is not communicating with the in-vehicle apparatus.