Abstract: A road status data providing system includes a server for transmitting/receiving data via a communication line and a plurality of vehicle terminals. The server includes a transmitting/receiving unit for transmitting/receiving data to and from the plurality of vehicle terminals, a vehicle trend management database for managing vehicle trends of the plurality of vehicle terminals, and a totaling unit for totaling status data indicative of a status of vehicles at a prescribed point on the basis of the vehicle trend management database. Each of the vehicle terminals includes a transmitting/receiving unit for transmitting/receiving data to and from the server, a present position determining unit for determining the present position of the vehicle, and a creating unit for creating status data requesting information for acquiring the status data at the prescribed point.

Abstract: The navigation system includes an information server apparatus, a terminal apparatus for conducting navigation processing while conducting communication with the information server apparatus, and a vehicle navigation apparatus mounted on a vehicle to conduct navigation processing independently of the information server apparatus. During execution of the navigation processing in the terminal apparatus, detection is effected to determine whether the vehicle navigation apparatus is started. Upon detecting that the vehicle navigation apparatus has been started, information for the navigation processing conducted until then is transferred to the vehicle navigation apparatus. The vehicle navigation apparatus conducts navigation processing by using the transferred information.

Abstract: To provide a navigation system capable of easily switching between a portable terminal unit and a communication navigation terminal unit with an identical telephone number and also having considered a communication environment. A communication navigation system is comprised of an information server unit for controlling communication, a portable terminal unit and a vehicle terminal unit for performing navigation with the information server unit, and performs the communication by using a public switched telephone network circuit, and when switching each terminal unit to a communication capable state, it controls a position registration of each terminal unit by performing the communication among the information server unit, portable terminal unit and vehicle terminal unit so as to switch the communication capable state.

Abstract: In a vehicle-installed AV device, the power is supplied to various sections of the vehicle-installed AV device via a key switch from a battery of a vehicle. The vehicle-installed AV device is provided with: a predicting/detecting section for detecting a running state of the vehicle to predict an engine stop; a flash memory and a main memory for storing operation data of the vehicle-installed AV device; and a CPU for controlling the flash memory and the main memory. When the predicting/detecting section predicts the engine stop, the operation data stored in the main memory is written into the flash memory.

Abstract: To provide a communication navigation system capable of operating a plurality of communication navigation terminal apparatuses in synchronization and switching among them while maintaining settings related to navigation. A navigation system is comprised of an information server apparatus, a portable terminal apparatus and a vehicle terminal apparatus for performing a navigation process, and when switching a movable body for performing the navigation, it switches a sending destination of navigation data such as map information, that is, a terminal apparatus while maintaining settings such as the destination information before connecting so as to continuously conduct the navigation such as route searching and route guidance.

Abstract: A navigation system comprises a navigation apparatus mounted on a vehicle and a portable information device communicable with the navigation apparatus based on a predetermined communication protocol. The navigation apparatus searches a route from a current position to a destination, and guides the searched route to the vehicle, that is, crews on board. The navigation apparatus further comprises a unit for searching a further route from a further current position to the destination in response to a predetermined command. The further current position is a position at which the unit searches the further route. The navigation apparatus further comprises a transfer unit for transferring information indicative of the further route to the portable information device. This device provides a person, who carries the device, with a further route guide by showing the further route, after the route guide performed by the navigation apparatus.

Abstract: An automatic guidance system is comprised of a navigation apparatus mounted on a vehicle and a control server apparatus fixedly installed in an automatic travel control center which controls traveling in an automatic traveling section. The control server apparatus and the navigation apparatus establish a communication line through a mobile communication network. The navigation apparatus makes a search for a route to a destination. If at least part of the automatic traveling section is used in a route set by the search, the automatic traveling section is registered in the control server apparatus through the communication line.

Abstract: An automatic guidance system is comprised of a navigation apparatus mounted on a vehicle and a control server apparatus fixedly installed in an automatic travel control center which controls traveling in an automatic traveling section. The control server apparatus and the navigation apparatus establish a communication line through a mobile communication network. The navigation apparatus makes a search for a route to a destination. If at least part of the automatic traveling section is used in a route set by the search, the automatic traveling section is registered in the control server apparatus through the communication line.

Abstract: A road status data providing system includes a server for transmitting/receiving data via a communication line and a plurality of vehicle terminals. The server includes a transmitting/receiving unit for transmitting/receiving data to and from the plurality of vehicle terminals, a vehicle trend management database for managing vehicle trends of the plurality of vehicle terminals, and a totaling unit for totaling status data indicative of a status of vehicles at a prescribed point on the basis of the vehicle trend management database. Each of the vehicle terminals includes a transmitting/receiving unit for transmitting/receiving data to and from the server, a present position determining unit for determining the present position of the vehicle, and a creating unit for creating status data requesting information for acquiring the status data at the prescribed point.

Abstract: To provide a navigation system capable of easily switching between a portable terminal unit and a communication navigation terminal unit with an identical telephone number and also having considered a communication environment. A communication navigation system is comprised of an information server unit for controlling communication, a portable terminal unit and a vehicle terminal unit for performing navigation with the information server unit, and performs the communication by using a public switched telephone network circuit, and when switching each terminal unit to a communication capable state, it controls a position registration of each terminal unit by performing the communication among the information server unit, portable terminal unit and vehicle terminal unit so as to switch the communication capable state.

Abstract: A navigation system comprises a navigation apparatus mounted on a vehicle and a portable information device communicable with the navigation apparatus based on a predetermined communication protocol. The navigation apparatus searches a route from a current position to a destination, and guides the searched route to the vehicle, that is, crews on board. The navigation apparatus further comprises a unit for searching a further route from a further current position to the destination in response to a predetermined command. The further current position is a position at which the unit searches the further route. The navigation apparatus further comprises a transfer unit for transferring information indicative of the further route to the portable information device. This device provides a person, who carries the device, with a further route guide by showing the further route, after the route guide performed by the navigation apparatus.

Abstract: To provide a communication navigation system capable of operating a plurality of communication navigation terminal apparatuses in synchronization and switching among them while maintaining settings related to navigation. A navigation system is comprised of an information server apparatus, a portable terminal apparatus and a vehicle terminal apparatus for performing a navigation process, and when switching a movable body for performing the navigation, it switches a sending destination of navigation data such as map information, that is, a terminal apparatus while maintaining settings such as the destination information before connecting so as to continuously conduct the navigation such as route searching and route guidance.

Abstract: The navigation system includes an information server apparatus, a terminal apparatus for conducting navigation processing while conducting communication with the information server apparatus, and a vehicle navigation apparatus mounted on a vehicle to conduct navigation processing independently of the information server apparatus. During execution of the navigation processing in the terminal apparatus, detection is effected to determine whether the vehicle navigation apparatus is started. Upon detecting that the vehicle navigation apparatus has been started, information for the navigation processing conducted until then is transferred to the vehicle navigation apparatus. The vehicle navigation apparatus conducts navigation processing by using the transferred information.

Abstract: A navigation system has a first communication terminal unit; a second communication terminal unit which communicates with the first communication terminal unit; and a car navigation apparatus. The first communication terminal unit transmits the self-location information to the second communication terminal unit. The second communication terminal unit receives the location information transmitted from the first communication terminal unit; and transfers the received location information to the car navigation apparatus. The car navigation apparatus sets up a destination on the basis of the location information transferred from the second communication terminal unit and searches for the route up to the destination.

Abstract: In a vehicle-installed AV device, the power is supplied to various sections of the vehicle-installed AV device via a key switch from a battery of a vehicle. The vehicle-installed AV device is provided with: a predicting/detecting section for detecting a running state of the vehicle to predict an engine stop; a flash memory and a main memory for storing operation data of the vehicle-installed AV device; and a CPU for controlling the flash memory and the main memory. When the predicting/detecting section predicts the engine stop, the operation data stored in the main memory is written into the flash memory.