Position locating system, server, position locating method, and program
AssigneePIONEER CORPORATION and INCREMENT P CORPORATION
InventorsKouji Amano, Takashi Nozaki
Life of this patent
Estimating the term…
Abstract
A server includes a position estimation section for estimating the current position of a client apparatus based on the already acquired position information when the server cannot acquire position information from the client apparatus and the server requests the client apparatus to transmit position information in response to a search instruction from an information terminal.
Claims28
A position locating system comprising:
- a client apparatus for detecting current position of the client apparatus and transmitting obtained position information at a predetermined frequency;
- an information terminal for transmitting an instruction for searching for the current position of the client apparatus;
- and
- a server for receiving the current position search instruction from the information terminal and transmitting map image data containing the current position of the client apparatus to the information terminal based on the position information transmitted from the client apparatus,
- wherein the server includes a position estimation section for estimating the current position of the client apparatus based on the already acquired position information when the server cannot acquire the position information from the client apparatus and the server requests the client apparatus to transmit position information in response to the search instruction from the information terminal.
A server comprising:
- a transmission-reception section for receiving position information from a client apparatus at a predetermined frequency, receiving a position search instruction from an information terminal, and transmitting map image data containing current position of the client apparatus to the information terminal;
- a position locating processing section for generating the map image data containing the current position of the client apparatus located based on the position information transmitted from the client apparatus;
- and
- a position estimation section for generating the map image data containing the current position of the client apparatus estimated based on the already acquired position information when the position information from the client apparatus cannot be acquired and the client apparatus is requested to transmit position information in response to the search instruction from the information terminal.
A position locating method comprising the steps of:
- requesting a client apparatus to transmit position information in response to current position search instruction;
- locating current position of the client apparatus based on the position information transmitted from the client apparatus;
- estimating the current position of the client apparatus based on already acquired position information when the client information is requested to transmit the position information in response to the current position search instruction and the position information from the client apparatus cannot be acquired;
- and
- transmitting map image data containing the current position of the client apparatus, which is located or estimated.
A program executed by a server for causing a computer to function as:
- a transmission-reception section for receiving position information from a client apparatus at a predetermined frequency and receiving a position search instruction from an information terminal and transmitting map image data containing the current position of the client apparatus to the information terminal;
- a position locating processing section for generating the map image data containing the current position of the client apparatus located based on the position information transmitted from the client apparatus;
- and
- a position estimation section for generating the map image data containing the current position of the client apparatus estimated based on the already acquired position information when the position information from the client apparatus cannot be acquired and the client apparatus is requested to transmit position information in response to the search instruction from the information terminal.
A position information transmission apparatus being installed in a mobile unit, for detecting position of the apparatus and transmitting acquired position information to a server for locating the position of the apparatus, the position information transmission apparatus comprising:
- a position information transmission frequency setting section for setting transmission frequency of the position information in response to move speed of the mobile unit.
A position information transmission method comprising the steps of:
- detecting position of a mobile unit;
- and
- transmitting acquired position information to a server for locating the position of the mobile unit;
- determining move speed of the mobile unit;
- and
- setting transmission frequency of the position information in response to the move speed of the mobile unit.
A program for detecting the position of a mobile unit and transmitting acquired position information to a server for locating the position of the mobile unit, said program for causing a computer to function as:
- a section for determining move speed of the mobile unit;
- and
- a section for setting transmission frequency of the position information in response to the move speed of the mobile unit.
Dependencies are inferred from the claim text.