Positional information management system, positional information management method, recording medium, and mobile terminal
First Claim
1. A positional information management system comprising:
- a mobile terminal which acquires acceleration data at a predetermined position;
a management server which is connected to said mobile terminal through a network and predicts a travel route of said mobile terminal; and
a communication system which specifies a current position of said mobile terminal and sends positional data representing the specified current position to said management server, wherein said management server;
is connected to a positional data storage unit which stores positional data representing that said mobile terminal is at a predetermined position, which is sent from said communication system in association with a reception time at which the positional data is received, and to an acceleration data storage unit which stores an acceleration log representing acceleration data in time series, which is sent from said mobile terminal in association with a reception time at which the acceleration log is received;
selects positional data for two positions which are recorded adjacently time-wise in said positional data storage unit, and which are included in a travel route which is a target of prediction;
extracts an acceleration log whose reception time corresponds to a reception time of any of the selected positional data; and
predicts a travel route of said mobile terminal based on the selected positional data and the extracted acceleration log.
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Accused Products
Abstract
A worker transfers GPS signals to a communication system at each node of traveling using a cellular phone terminal, and the communication system specifies the position of the cellular phone terminal and notifies positional information to a management system. When the cellular phone terminal cannot receive GPS signals or is outside a range accessible to the communication system, it starts recording acceleration data using an accelerometer. When a communicable state is recovered, the cellular phone terminal sends GPS signals and the recorded acceleration data to the communication system. A management computer determines whether the position notified by the communication system is an intended node. If the notified position is not an intended node, the management computer derives the position of the intended node using the acceleration data, and predicts the travel route based on the node position.
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Citations
12 Claims
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1. A positional information management system comprising:
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a mobile terminal which acquires acceleration data at a predetermined position;
a management server which is connected to said mobile terminal through a network and predicts a travel route of said mobile terminal; and
a communication system which specifies a current position of said mobile terminal and sends positional data representing the specified current position to said management server,wherein said management server;
is connected to a positional data storage unit which stores positional data representing that said mobile terminal is at a predetermined position, which is sent from said communication system in association with a reception time at which the positional data is received, and to an acceleration data storage unit which stores an acceleration log representing acceleration data in time series, which is sent from said mobile terminal in association with a reception time at which the acceleration log is received;
selects positional data for two positions which are recorded adjacently time-wise in said positional data storage unit, and which are included in a travel route which is a target of prediction;
extracts an acceleration log whose reception time corresponds to a reception time of any of the selected positional data; and
predicts a travel route of said mobile terminal based on the selected positional data and the extracted acceleration log. - View Dependent Claims (2)
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3. A positional information management method for predicting a travel route from a notification point at which a mobile terminal should notify that it is at the point, based on positional data representing a current position of said mobile terminal which acquires acceleration data at a predetermined position, and an acceleration log representing acceleration data in time series acquired by said mobile terminal, the positional data and the acceleration log being notified through a predetermined network, said method comprising:
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a step of storing positional data and an acceleration log in association with times at which they are notified;
a step of selecting positional data for two positions which are recorded adjacently time-wise, and which are included in a travel route which is a target of prediction;
a step of extracting an acceleration log corresponding to any of the selected positional data; and
a step of predicting a travel route based on the selected positional data and the extracted acceleration log. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A mobile terminal which comprises:
- an acceleration measuring unit which senses an acceleration and measures an acceleration log;
a positional information acquiring unit which acquires predetermined positional information;
a control unit which controls said acceleration measuring unit and said positional information acquiring unit; and
a storage unit which stores predetermined data, and which sends predetermined information to a management system for managing the positional information,wherein said control unit;
determines whether or not data for specifying a position of said mobile terminal can be acquired by said positional information acquiring unit;
stores an acceleration log measured by said acceleration measuring unit in said storage unit, in a case where the positional information can not be acquired; and
sends data regarding the position of said mobile terminal acquired by said positional information acquiring unit and the acceleration log stored in said storage unit to said management system, in a case where acquisition of the positional information becomes possible. - View Dependent Claims (12)
- an acceleration measuring unit which senses an acceleration and measures an acceleration log;
Specification