Navigation system for transmitting real-time information allowing instant judgment of next action
First Claim
1. A navigation system comprising:
- a database holding real-time information indicating a ground state;
a server receiving positional information including a present position of a client through a satellite communication network, determining, as an information extraction range, a certain range on a map wider than a surrounding area of said present position based on said positional information, extracting, as real-time information to be transmitted, real-time information falling within said information extraction range and having a transmittable largest data quantity from said database, adding a header identifiable by said client to the extracted real-time information and transmitting the header-added real-time information through said satellite communication network at random; and
a navigator transmitting said positional information to said server through said satellite communication network, receiving information from said server through said satellite communication network, detecting said extracted real-time information from the received information while using said header, and displaying the detected real-time information.
5 Assignments
0 Petitions
Accused Products
Abstract
A server receives real-time information indicating a ground road traffic state and the like from a satellite or a camera at certain time intervals, and updates and records the real-time information in a database. If receiving positional information such as a present position from a navigator of a client, the server determines an information extraction range based on the positional information, extracts real-time information falling within the determined information extraction range from the database and transmits the extracted real-time information to the navigator through a satellite communication network. A main body unit of the navigator receives the real-time information and the navigator displays the received real-time information on a display unit. As a result, the present invention can transmit real-time information allowing a client to instantly judge a next action while moving by vehicle.
36 Citations
14 Claims
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1. A navigation system comprising:
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a database holding real-time information indicating a ground state;
a server receiving positional information including a present position of a client through a satellite communication network, determining, as an information extraction range, a certain range on a map wider than a surrounding area of said present position based on said positional information, extracting, as real-time information to be transmitted, real-time information falling within said information extraction range and having a transmittable largest data quantity from said database, adding a header identifiable by said client to the extracted real-time information and transmitting the header-added real-time information through said satellite communication network at random; and
a navigator transmitting said positional information to said server through said satellite communication network, receiving information from said server through said satellite communication network, detecting said extracted real-time information from the received information while using said header, and displaying the detected real-time information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A navigation system comprising:
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a database holding real-time information indicating a ground state;
a server receiving positional information including a present position of a client through a satellite communication network, determining, as an information extraction range, a certain region on a map wider than a surrounding area of said present position based on said positional information, extracting, as information to be transmitted, real-time information falling within said information extraction range from said database, adding a header identifiable by said client to the extracted real-time information, and transmitting the header-added real-time information through said satellite communication network at random; and
a navigator transmitting said positional information to said server through said satellite communication network, receiving information from said server through said satellite communication network, detecting said extracted real-time information from the received information while using said header, and displaying the detected real-time information, wherein said server receives surrounding information on the client from a plurality of clients, and updates the real-time information in said database using the received surrounding information. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification