Positioning device, mobile terminal, positioning method, and positioning program
AssigneeSeiko Epson Corporation
InventorMichio Kobayashi
Life of this patent
Estimating the term…
Abstract
A device and method are provided to reduce the time required for positioning by a GPS without allowing specific parties to occupy a communication channel. An initial location acquisition unit specifies a location of a broadcasting station based on a terrestrial digital broadcasting from the broadcasting station to set the location of the broadcasting station as an initial location for positioning in a positioning unit, and the positioning unit determines a present location by receiving a radio wave from a GPS satellite.
Claims10
A positioning device comprising:
- a positioning unit for positioning a present location by receiving a radio wave from a satellite;
- a communication unit for acquiring a public broadcast communication and for determining a broadcast frequency of the public broadcast communication;
- and
- an initial location setting unit for determining an originating location of the public broadcast communication corresponding to the broadcast frequency and for setting an initial location of the positioning device as the originating location to be used for the positioning
- wherein the positioning unit calculates the present location based on the initial location and the radio wave.
A mobile terminal comprising:
- a positioning unit for positioning a present location by receiving a radio wave from a satellite;
- a communication unit for acquiring information indicating a broadcast frequency of a public broadcast communication;
- an initial location setting unit for determining an originating location corresponding to the broadcast frequency and for setting an initial location of the mobile terminal as the originating location to be used for the positioning;
- and
- a display for displaying a result obtained by the positioning unit;
- wherein the positioning unit calculates the present location based on the initial location and the radio wave.
A positioning method comprising:
- a step of acquiring information indicating a broadcast frequency of a public broadcast communication;
- a step of determining an originating location of the public broadcast communication corresponding to the broadcast frequency;
- a step of setting an initial location as the originating location;
- a step of receiving a radio wave from a satellite;
- and
- a step of calculating a present location based on the received radio wave and the set initial location.
A positioning program comprising causing a computer to execute:
- a step of acquiring information indicating a broadcast frequency of a public broadcast communication;
- a step of determining an originating location of a public broadcast communication corresponding to the broadcast frequency;
- a step of setting an initial location as the originating location;
- a step of receiving a radio wave from a satellite;
- and
- a step of calculating a present location based on the received radio wave and the set initial location.
Dependencies are inferred from the claim text.