JP2002048561A - In a service that sends various types of information related to location information from a server to a terminal in accordance with the spatial location information of the terminal, the terminal sends it to the server by combining an external location information acquisition system and an internal location information acquisition system. Method and mechanism for keeping the spatial accuracy of an information display service high while protecting the privacy by sufficiently reducing the accuracy of the spatial location information provided - Google Patents

Abstract

(57) [Summary] (with correction) [Problem] To enable a terminal user to send his / her own location information to a server in detail to receive a service and to protect his / her privacy. A terminal sends only low-accuracy position information to a server, which makes it difficult for the server to specify a position on the terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to (1) a server (hereinafter, referred to as a "server") that stores a map in an electronic form and has a database in which coordinates (characters, voices, images, etc.) relating to coordinates on the map are combined. ), (2) Global Posi
A system for specifying the position of an object in a three-dimensional space based on a distance and an angle with a plurality of coordinates in a three-dimensional space represented by a Tioning System (hereinafter, referred to as a system)
"External location information acquisition system"), (3) The current location is grasped using the external location information acquisition system and transmitted to the server, while data corresponding to the location information transmitted from the server is received and displayed. And the device to be played (hereinafter,
“Terminal”), (4) Internal Navigation System that is installed inside the terminal and specifies the position of the terminal based on information that can be acquired inside the terminal, such as acceleration, together with position information from the three-dimensional position information acquisition system.
(Hereinafter, “internal position information acquisition system”).

[0002] An electronic map is a map in which actual geographical features such as those used in a car navigation system are associated with spatial coordinates (eg, latitude, longitude, and altitude). Terrain represented as two-dimensional or planar, terrain represented as three-dimensional or three-dimensional space,
Alternatively, it includes a terrain expressed including a higher dimension such as a temporal change (fourth coordinate axis).

The server is a single or a plurality of computers connected as a network, and has a capability of exchanging data with a terminal, which will be described later, via a telecommunications facility.

The server stores a map in an electronic form. In addition to the correspondence between the geographical features represented on the map in electronic form and the coordinates in space, data such as characters, images, sounds, etc. on buildings, roads, forests, rivers, etc. represented on the map Stores the database. The server is
Upon receiving the information transmission request from the terminal, the terminal searches the database and sends the extracted related data to the terminal.

[0004] The external position information acquisition system is Glob.
The terminal receives radio waves from a plurality of (three or more in two-dimensional, four or more in three-dimensional) coordinates installed outside the terminal, as represented by the al Positioning System, or a laser beam from the terminal. Is a mechanism for acquiring a distance and an angle by, for example, emitting light and reflecting the coordinates from the coordinates, and thereby acquiring the position of the terminal in space.

[0005] The internal position information acquisition system is Inte
Measure acceleration and other information using a gyro, etc. installed inside the terminal, as typified by the rnal Navigation System, to understand and calculate in what direction and how much the terminal has moved from a reference position in space. This is a mechanism for acquiring the position of the terminal in space.

[0006] The terminal specifies its own position in the space by combining the external position information acquisition system and the internal position information acquisition system, and transmits the position information to the server. It has the function of providing the user with information corresponding to the position in space by acquiring the corresponding data, displaying and reproducing it.

[0007] The terminal can provide precise location information when transmitting the location information to the server, but provides ambiguous location information such as being located somewhere in an area having a certain size. You can also. The size of this area can be set arbitrarily by minimizing a specific point on the space and maximizing the area limited by the capacity of the storage medium provided in the terminal.

[0008] When a terminal user does not completely disclose his / her location information to the server side and wants to use data corresponding to the location information, the location information transmitted to the server by operating the terminal is vague. can do. By doing so, the server side (administrator) cannot completely know the location information of the user, so that the risk of the server side violating the privacy of the user is reduced. This means that the cost for privacy protection measures on the server side is reduced.

[0009] The server receiving the ambiguous location information from the terminal transmits the data contained in the area to the terminal collectively (hereinafter, referred to as "download"). After downloading, the terminal location information is not acquired until a data request is made from the terminal.

[0010] The terminal provides a service of obtaining detailed location information exclusively using the internal location information acquisition system and displaying data corresponding to the location on the terminal while using the external location information acquisition system. . By doing so, it is possible to minimize a decrease in the accuracy of the information providing service.

When the terminal goes out of the geographical area corresponding to the data stored in its own storage medium, it discards the data relating to the previous area and requests the server to transmit the data relating to the current area. The server downloads data included in the area based on the ambiguous position information sent from the terminal. This operation, ie, a series of operations of discarding old data → requesting new data → receiving new data is called “handover”. In this way, even a terminal user having only a small-capacity storage medium can acquire information on a large area, while a terminal user having a large-capacity storage medium can obtain information on his or her own space. Without revealing the location information to the server side, it is possible to receive a detailed information service.

Further, if the storage medium capacity of the terminal increases, not only the privacy of the user is easily ensured, but also the frequency of communication between the terminal and the server decreases, and various costs for communication can be reduced. become.

[0013]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display device and an information display method using a navigation mechanism and a mobile communication mechanism.

[0014]

2. Description of the Related Art In a conventional navigation mechanism, a terminal holds an electronic map as CD-ROM or DVD data, and obtains an external position information acquisition system such as a GPS or internal position information such as an INS (registered trademark). By combining the systems, the coordinates on the map and the terminal position have been matched, and data related to the coordinates has been displayed.
In this method, since only positional information is acquired from external coordinates of an artificial satellite or the like, there is no need to transmit the positional information of the user to the outside, and the user can maintain privacy.

In the conventional information display device using a mobile communication terminal, a database in which a map in an electronic form and data related to coordinates on the map are stored on a server side because of a small storage capacity or the like. And the terminal notifies the server of its position in the space as necessary, receives data corresponding to the current position transmitted from the server, and displays the data on the terminal. In this method, since the data is placed on the server side, the administrator can update the database as needed, and there is an advantage that the update is promptly reflected on the display on the terminal side. Further, since a large amount of storage medium is not required, the terminal can be downsized, and the portability of the terminal has been improved.

[0016]

The conventional navigation mechanism stores various data associated with coordinates on an electronic map on a fixed storage medium such as a CD-ROM or DVD. You don't always get the latest information.

In the conventional information display using the mobile communication terminal, the user needs to notify the server of his / her current position in order to receive data from the server. For this reason, there is a possibility that the server can know in detail when and where the user is, and there is a problem from the viewpoint of privacy protection.

[0019]

According to the present invention, (I) downloading data associated with a certain area on a map according to the capacity of a storage medium of the terminal; When moving beyond, by updating data by handover, (a) it is possible to always store the latest information on the terminal side, and (b) detailed position information is not transmitted to the server side. To protect personal privacy,
(C) additionally reduce the frequency of communication between the terminal and the server,
This makes it possible to reduce the processing load on the server and the communication line.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be applied to an information service for providing a mobile terminal with a map in an electronic form and data related to coordinates on the map.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An automobile guidance system (car navigation system) or a personal guidance system (personal navigation system) which can be used anywhere in the world without being affected by the amount of storage media.

In a shopping district or a downtown area, for customers who need a particular product or service, the latest information on the product or service is displayed together with the location information of a nearby shop or business office, so that the customer can be appropriately designated. A customer guidance system that guides customers to stores and sales floors.

[0023]

According to the present invention, data associated with the latest coordinates on a map can be provided to a small mobile terminal having only a small storage medium capacity, and a handover can be performed on an infinitely large map. Can be associated with the data associated with the coordinates.

Since the accuracy of the location information transmitted from the terminal to the server can be arbitrarily varied, the terminal user can send his / her own location information to the server in detail to receive the service, while receiving the location information. You can protect your privacy by sending it to the server with reduced accuracy.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a system.

FIG. 2 is a process diagram showing the operation of the system.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09B 29/10 G09B 29/10 A // H04Q 7/34 H04B 7/26 106B (54) [Title of Invention] In a service in which various information related to location information is transmitted from a server to a terminal in accordance with the spatial location information of the terminal, a combination of an external location information acquisition system and an internal location information acquisition system allows a terminal to transmit information. Method and mechanism for maintaining the spatial accuracy of an information display service high while sufficiently reducing the accuracy of spatial position information transmitted to a server and protecting privacy

Claims (1)

[Claims] 1. A server which stores a map in an electronic form and has a database in which data relating to coordinates on the map are associated with the data, and (2) a distance and an angle to a plurality of coordinates in a three-dimensional space. An external position information acquisition system that specifies the position of an object in a three-dimensional space based on, for example, (3) the current position is grasped using the external position information acquisition system and transmitted to the server while being transmitted from the server; A terminal that receives, displays and reproduces data according to the location information that comes
(4) An internal position information acquisition system that is installed inside the terminal and specifies the position of the terminal based on information that can be acquired inside the terminal such as acceleration together with position information from the external position information acquisition system, A) While the terminal sends only sufficiently low-accuracy position information to the server, it is difficult for the server to specify the position of the terminal from the server, thereby protecting the privacy of the terminal user. A mechanism that uses the internal location information system to accurately display coordinate-related data obtained from the server on the terminal in relation to location information.