Positioning system

A communication base station on a communication network asynchronous between communication base stations, the communication base station comprising:

• satellite-time information generating means for generating continuously satellite-time information representative of a satellite-time that is a time of a positioning satellite, on the basis of a satellite signal from the positioning satellite;
• satellite-orbit information generating means for generating satellite-orbit information at a time interval regulated by an effective time period of the satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information;
• satellite-time information transmitting means for sending the satellite-time information to the terminal;
• and
• positioning-auxiliary information transmitting means for sending positioning auxiliary information including the satellite-orbit information to the terminal.

A positioning system, asynchronous between communication base stations, having a communication base station capable of receiving a satellite signal that is a signal from a positioning satellite and a terminal capable of communicating with the communication base station,

• the communication base station comprising:
• communication-information transmitting means for sending communication information constituted by a plurality of frames to the terminal;
• satellite-time information generating means for continuously generating satellite-time information representative of a satellite-time that is a time of the positioning satellite for each of the frames of the communication information on the basis of the satellite signal;
• satellite-orbit information generating means for generating satellite-orbit information at a time interval regulated by an effective time period of the satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information;
• requested-satellite-time information transmitting means that sends, to the terminal, satellite-time information as to the frame requested from the terminal;
• positioning-auxiliary information transmitting means for sending positioning auxiliary information including the satellite-orbit information;
• and
• the terminal comprising:
• communication information receiving means for receiving the communication information from the communication base station;
• satellite-time information acquiring means for acquiring the satellite-time information for the frame received immediately before positioning, from the communication base station;
• positioning-auxiliary information acquiring means for acquiring the positioning auxiliary information from the communication base station;
• and
• positioning means for locating a position of the terminal on the basis of the satellite signals from a plurality of the positioning satellites by use of the satellite-time information and the satellite-orbit information.

A communication base station on a communication network asynchronous between communication base stations, the communication base station comprising:

• communication information transmitting means for sending communication information constituted by a plurality of frames, to the terminal;
• satellite-time information generating means for continuously generating, satellite-time information representative of a satellite-time that is a time of a positioning satellites for each of the frames of the communication information on the basis of a satellite signal;
• satellite-orbit information generating means for generating satellite-orbit information at a time interval regulated by an effective time period of the satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information;
• requested-satellite-time information transmitting means for sending the satellite-time information as to the frame requested from the terminal, to the terminal;
• and
• positioning-auxiliary information transmitting means for sending positioning auxiliary information including the satellite-orbit information to the terminal.

A control method for a communication base station, comprising the steps of:

• generating continuously satellite-time information representative of a satellite-time that is a time of a positioning satellite on the basis of a satellite signal that is a signal from the positioning satellite, by the communication base station on a communication network asynchronous between communication base stations;
• generating satellite-orbit information at a time interval regulated by an effective time period of satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information, by the communication base station;
• sending the satellite-time information to the terminal, by the communication base station;
• and
• sending positioning auxiliary information including the satellite-orbit information to the terminal, by the communication base station.

A communication base station control program allowing a computer to execute the steps of:

• generating continuously satellite-time information representative of a satellite-time that is a time of a positioning satellite on the basis of a satellite signal that is a signal from the positioning satellite, by a communication base station on a communication network asynchronous between communication base stations;
• generating satellite-orbit information at a time interval regulated by an effective time period of satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information, by the communication base station;
• sending the satellite-time information to the terminal, by the communication base station;
• and
• sending positioning auxiliary information including the satellite-orbit information to the terminal, by the communication base station.

A computer-readable recording medium recording a control program for a communication base station, allowing a computer to execute the steps of:

• generating continuously satellite-time information representative of a satellite-time that is a time of a positioning satellite on the basis of a satellite signal that is a signal from the positioning satellite, by a communication base station on a communication network asynchronous between communication base stations;
• generating satellite-orbit information at a time interval regulated by an effective time period of satellite-orbit information representative of an orbit of the positioning satellite when generating the satellite-time information, by the communication base station;
• sending the satellite-time information to the terminal, by the communication base station;
• and
• sending positioning auxiliary information including the satellite-orbit information to the terminal, by the communication base station.