Patent ID: 7117085

Claim:
A method of exchanging navigation information between a terminal and a control center, the navigation information including route information for at least one route between a starting point and a destination, the method comprising: verifying at least one of a starting point reference ID and starting coordinates; verifying at least one of a destination reference ID and destination coordinates; calculating route data; transmitting to the terminal a route response containing at least a part of the route data, wherein the route data correspond to one of the at least one route and at least one partial route from a starting point to an intermediate point located between the starting point and the destination at least as a function of a length of the at least one route, and wherein the intermediate point has at least one of a verified intermediate point reference ID and verified intermediate point coordinates; and requesting additional route data from the control center via one of the terminal and a separate device before the intermediate point is reached, wherein: the terminal includes a mobile terminal, and the additional route data corresponding to one of a route from the intermediate point to the destination and a route from the intermediate point to an additional intermediate point.