Communication-based navigation system

摘要

A communication-based navigation system that detects a traffic volume change and searches for a route. The system comprises terminal retaining geographic information and generating a route request and a traffic condition check request; traffic analysis server having at least one database corresponding to and in communication with the terminal; and service server receiving route request from the terminal for searching for route and transmitting searched route to the terminal and traffic analysis server, and relaying the traffic condition check request from the terminal to traffic analysis server. Traffic analysis server stores in database the searched route from service server and traffic conditions in the searched route and is responsive to the traffic condition check request signal for detecting traffic condition change from comparing a current traffic condition in the searched route with a previous traffic condition stored in the database and for transmitting the traffic condition change.

主权项

1. A communication-based navigation system, comprising:
a terminal configured to transmit a route request signal and a traffic condition check request signal; a service server including a route searching unit configured
to receive the route request signal from the terminal, andto search a route in response to the route request signal; and a traffic analysis server including
a database configured to store the route and a traffic condition on the route, anda traffic condition change calculation unit configured
to compare the traffic condition stored in the database with a current traffic condition, andto calculate a traffic condition change, wherein the service server is configured
to transmit the route to the terminal and the traffic analysis server,to receive the traffic condition check request signal from the terminal, andto transmit the traffic condition check request signal to the traffic analysis server, the traffic analysis server is configured
upon receiving the route from the service serve, to receive the traffic condition on the route from an external traffic information providing source and to store the route and the traffic condition on the route in the database in association with the terminal,upon receiving the traffic condition check request signal from the service server, to compare the traffic condition stored in the database with the current traffic condition and to calculate the traffic condition change,to perform a determination whether or not a re-search of the route is needed based on the traffic condition change, andto transmit the traffic condition change and a result of the determination to the service server, the service server is configured, upon receiving the traffic condition change and the result of determination from the traffic analysis server, to transmit the traffic condition change, a transmission cycle of the traffic condition check request signal determined based on the traffic condition change, or the result of determination to the terminal, and the terminal is configured
upon receiving the traffic condition change from the service server, to determine a transmission cycle of the traffic condition check request signal based on the traffic condition change and to transmit the traffic condition check request signal based on a determined transmission cycle,upon receiving the transmission cycle of the traffic condition check request signal from the service server, to transmit the traffic condition check request signal based on a received transmission cycle, andupon receiving the result of determination and when the result of determination indicates that the re-search of the route is needed, to transmit a route recalculation request signal to the service server.