JP2005012597A - Location information providing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a location information providing system in which location information of a moving object such as a vehicle can be provided via an IP network even when the moving object moves between the networks on the IP network. <P>SOLUTION: The location information providing system comprises a positioning function which detects the location using a GPS and stores the detected location information, and a communication function for providing the location information which is requested via the IP network, via the IP network. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides position information that enables position information of a moving object to be provided via the IP network even when a moving object such as a vehicle moves between networks on an IP (Internet protocol) network. About the system.
[0002]
[Prior art]
GPS (global positioning system, a global positioning system) is a positioning system using an artificial satellite developed by the US Department of Defense, and its technology is open to the private sector, and the technology is used for car navigation devices and the like. The artificial satellites cover the entire globe with 24 satellites, and transmit navigation data such as satellite orbit information, clock information possessed by the satellites, and position information of other artificial satellites. The car navigation device detects the position by measuring the distance between the vehicle and the two satellites, and displays the position on a map.
[0003]
As an application technology of the car navigation device, the position of the vehicle measured by GPS is recorded at predetermined time intervals, and this position information is transmitted to a reception center connected to the IP network via the public wireless communication network. The technology related to the vehicle anti-theft device and system that reduces the burden of reporting the vehicle user's own vehicle theft by monitoring, tracking the vehicle's destination at the reception center and reporting to the police etc. has been reported. (For example, refer to Patent Document 1).
[0004]
A position information providing system equipped with the navigation device using the GPS will be described.
FIG. 5 is a diagram for explaining a conventional position information providing system environment. Conventional position information providing systems 7a and 7b mounted on a vehicle, the conventional position information providing system 7 (conventional position information providing systems 7a and 7b), and FIG. 7 is used, the center 6 managing the center 6, the branch 8 of the center 6, the center 6 and the conventional location information providing system 7 are connected to a public wireless communication network, and the center 6 and the branch 8 Indicates that it is connected to the IP network.
[0005]
The conventional position information providing system 7a is equipped with a navigation device 75a, confirms the position of the vehicle on which the conventional position information providing system 7a is mounted, and the position information detected by the navigation device 75a is a communication function 74a, public The data is transmitted to the center 6 through the wireless communication network and the communication function 61. In the center 6, the position information received via the communication function 61 is stored in the server 62, and the position information stored in the server 62 is displayed on the terminal 64 such as a display by the control of the client 63 such as a personal computer. It becomes possible to monitor the position of the vehicle equipped with the conventional position information providing system 7a.
[0006]
Further, the conventional position information providing system 7a is equipped with a client 72a such as a personal computer, connected to the center 6 via the communication function 71a, the public wireless communication network, and the communication function 61, and stores information stored in the server 62. The information is used and connected to the IP network via the center 6, and necessary information is output from a terminal 73a such as a printer.
[0007]
Since the conventional position information providing system 7b has the same configuration as the conventional position information providing system 7a, description thereof is omitted.
A client 81 such as a personal computer installed in the branch 8 can use information such as position information stored in the server 62 of the center 6 via the IP network.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-95072
[Problems to be solved by the invention]
As described above, as shown in FIG. 5, as an application technique of the car navigation device 75 (the car navigation devices 75a and 75b are collectively referred to by the reference numeral 75), the position information detected by the car navigation device 75 is It is transmitted to the center 6 as a communication destination via the public wireless communication network, and the center 6 can recognize the position of a moving body such as a vehicle. However, in order to recognize the position of the mobile unit from the branch 8 other than the center 6 which is the communication destination of the mobile unit and other mobile units, it is necessary to access the server 62 of the center 6 directly. It was difficult to confirm the position of the moving body.
[0010]
The present invention solves the above-described problems, and even when a moving body such as a vehicle moves between networks on an IP network, the position information of the moving body is provided via the IP network. An object is to provide a position information providing system that can be used.
[0011]
[Means for Solving the Problems]
A first invention includes a positioning function for storing position information detected by GPS, and a communication function for providing position information requested to be provided via an IP network via the IP network. This is a position information providing system.
According to the first invention, it is possible to provide a position information providing system capable of recognizing the position of a moving body such as a vehicle equipped with the position information providing system of the present invention from a client connected to the IP network. It becomes possible.
[0012]
A second invention is the positional information providing system according to the first invention,
A position information providing system comprising a positioning function for storing position information detected by GPS, position information obtained from a moving speed and a moving direction of a moving body equipped with the position information providing system.
According to the second invention, it is possible to provide a position information providing system capable of recognizing the position of a moving body such as a vehicle equipped with the position information providing system of the present invention even when positioning by GPS is difficult. It becomes possible.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining a position information providing system environment according to the present invention. The position information providing systems 2a and 2b mounted on a vehicle, the position information providing system 2 The center 1 which manages 2) is shown, and the branch 3 of the center 1 is shown. In the center 1, a local area network (LAN) is configured by an HA (home agent home agent) 10, a server 11, a client 12 such as a personal computer, and a terminal 13 such as a display or a printer. In the position information providing system 2a, a communication function 21a for performing communication by mobile radio, a positioning function 22a for detecting position information by GPS, a position display function 23a for displaying a position on a map based on the position information, a terminal 24a such as a printer, a personal computer The in-vehicle LAN is configured by the client 25a. Similarly, the position information providing system 2b includes a communication function 21b for performing communication by mobile radio, a positioning function 22b for detecting position information by GPS, a position display function 23b for displaying a position on a map based on the position information, and a terminal such as a printer. An in-vehicle LAN is configured by a client 25b such as a personal computer 24b. In addition, the branch office 3 has a LAN as well as the center 1, but only the client 31 such as a personal computer is described. The center 1 is connected to the IP network via the HA 10, the location information providing system 2a is connected to the FA (foreign agent external agent) 20a, and the location information providing system 2b is connected to the IP network via the FA 20b.
[0014]
Here, each of the location information providing system 2a and the location information providing system 2b has an IP address, and the IP address of the location information providing system 2a is 002A and the IP address of the location information providing system 2b is 002B. Is managed by HA10. The FA 20a periodically broadcasts the care-of address of the FA 20a, which is an IP address for specifying the moving destination network of the mobile body. When a vehicle equipped with the position information providing system 2a moves to an area under the control of the FA 20a, the position information providing system 2a acquires the care-of address and notifies the HA 10 of the combination of its own IP address 002A and the care-of address. To do. The HA 10 stores the combination and manages the location of the location information providing system 2a. Similarly, the FA 20b periodically broadcasts the care-of address of the FA 20b, which is an IP address for specifying the moving destination network of the moving body. When a vehicle equipped with the position information providing system 2b moves to an area under the control of the FA 20b, the position information providing system 2b acquires the care-of address and notifies the HA 10 of the combination of its own IP address 002B and the care-of address. To do. The HA 10 stores the combination and manages the location of the location information providing system 2b.
[0015]
When sending an IP packet from the client 31 of the branch 3 to the location information providing system 2a, the client 31 sends an IP packet having the destination address as 002A, which is the IP address of the location information providing system 2a, and the HA 10 An IP packet addressed to the location information providing system 2a is received, encapsulated into an IP packet addressed to the care-of address combined with 002A, which is the IP address of the location information providing system 2a, and transferred to the FA 20a. Upon receiving the encapsulated IP packet, the FA 20a transmits the decapsulated IP packet to the subordinate position information providing system 2a.
[0016]
With the mobile IP technology described above, not only the center 1 and the location information providing system 2, but also the branch 3 and the location information providing system 2, the location information providing system 2a, and the location information providing system 2b can transmit and receive IP packets. Become.
Therefore, in the position information providing system 2a, the position information detected by the positioning function 22a is stored together with the time information by the positioning function 22a, and the latest position information is displayed on the map by the position display function 23a. As will be described later, in response to a request from the client 12 or the client 31 such as the center 1 or the branch 3, the location information providing system 2a can provide the detected and stored location information via the IP network. It becomes possible. The location information providing system 2b is similar to the location information providing system 2a, and can receive location information provided by the location information providing system 2a.
[0017]
Next, a function that the position information providing system 2 responds to a request for providing position information will be described.
FIG. 2 is a block diagram for explaining the positioning function, and shows blocks constituting the positioning function 22 shown in FIG. 1 (reference numeral 22 is used when the positioning functions 22a and 22b are generically referred to). The positioning function 22 includes a GPS receiving unit 221 that receives a GPS signal, a vehicle speed / azimuth acquiring unit that detects a moving speed and a moving direction of the vehicle that can be obtained from information from a vehicle on which the position information providing system 2 is mounted. 222, a position information generating unit 223 that generates position information indicating position coordinates constituted by longitude and latitude at which the vehicle is located, based on detection values obtained by the GPS receiving unit 221, the vehicle speed / orientation acquiring unit 222, and the position information A location information storage unit 224 that stores the location information generated by the generation unit 223 and the time when the location information was acquired; a management control unit 225 that controls the location information storage unit 224 in response to a request to provide the location information; 1 is a packet receiver 22 that receives an IP packet that arrives via a communication function 21 (the reference numeral 21 is used when the communication functions 21a and 21b are collectively referred to). , Constituting a packet transmission unit 227 transmits the location information read from the positional information storage unit 224 as the IP packet.
[0018]
Here, in the case of the first aspect of the present invention, the vehicle speed / orientation acquisition unit 222 is excluded.
FIG. 3 is a position information storing process flow, and the process in which the positioning function 22 stores position information will be described with reference to FIG.
S1. The position information generation unit 223 acquires the current time.
S2. The position information generation unit 223 determines whether positioning is possible based on the GPS detection result.
S3. This is a case where positioning by GPS is possible in step S2, and the position information generation unit 223 acquires position information indicating position coordinates constituted by longitude and latitude detected by the GPS receiving unit 221.
S4. This is a case where positioning by GPS is impossible in step S <b> 2, and the position information generation unit 223 acquires the previous position information from the position information storage unit 224 under the control of the management control unit 225.
S5. The vehicle speed / orientation acquisition unit 222 acquires the moving speed and moving direction of the vehicle that can be obtained from information from the vehicle on which the position information providing system 2 is mounted.
S6. The position information generation unit 223 calculates position information indicating the current position coordinates from the position information including the previous time acquired in step S4 and the speed and direction acquired in step S5.
S7. The position information generation unit 223 stores the current time acquired in Step S1 and the position information acquired by GPS in Step S3 or the position information calculated and acquired in Step S6 in the position information storage unit 224.
S8. The position information generation unit 223 waits for the positioning cycle time set by the position information providing system 2 or the client, and returns to step S1.
[0019]
Note that the calculation described in step S6 means that the time difference between the previous time and the current time acquired in step S1 is multiplied by the speed acquired in step S5 to obtain the movement distance, and the previous position information (position coordinates) is obtained. The moving distance is added to the moving direction acquired in step S5.
In the case of the first invention of the present invention, steps S2, S4 to S6 of the above processing flow are excluded.
[0020]
FIG. 4 is a position information request / response process flow, and the process in which the positioning function 22 responds to a request for providing position information will be described with reference to FIG. Here, the following three types are considered as cases in which provision of position information is requested.
Request type 1: Providing the latest location information.
Request type 2: Continuous provision of the latest location information until a specified time.
Request type 3: Provision of location information history that goes back to the specified time.
S11: The packet receiving unit 226 receives the IP packet and notifies the management control unit 225 of the IP packet.
S12: The management control unit 225 determines the request type from the received IP packet. In addition, the packet transmission unit 227 is notified of the transmission source IP address of the IP packet.
S13: This is a case where the request type of the IP packet received in step S12 is request type 1, and the management control unit 225 reads the latest position information from the position information storage unit 224.
S14: The packet transmission unit 227 transmits an IP packet having the transmission source IP address notified in step S12 as the transmission destination IP address for the position information read in step S13.
S15: This is a case where the request type of the IP packet received in step S12 is the request type 2, and the management control unit 225 provides the time specified by the IP packet data for the time width for continuously providing the latest position information. Set as.
S16: The management control unit 225 reads the latest position information from the position information storage unit 224.
S17: The packet transmission unit 227 transmits the IP packet having the transmission source IP address notified in step S12 as the transmission destination IP address of the position information read in step S16.
S18: The management control unit 225 waits for the IP packet transmission interval time. Note that the IP packet transmission interval time may be specified by IP packet data or may be specified as the location information providing system 2, and when specified by IP packet data, it is set in step S15.
S19: The management control unit 225 determines whether the specified time set in step S15 has elapsed. As a result of the determination, if the designated time has not elapsed, the process returns to step S16. If the specified time has elapsed, the process ends.
S20: This is a case where the request type of the IP packet received in step S12 is request type 3, and the management control unit 225 reads position information in the specified time range based on the IP packet data from the position information storage unit 224.
S21: The packet transmission unit 227 transmits an IP packet having the position information read in step S20 as the transmission destination IP address, which is the transmission source IP address notified in step S12.
[0021]
Note that the position information generation unit 223 in the positioning function 22 in FIG. 2 is only the position information from the GPS reception unit 221, or the position information in which the GPS reception unit 221 and the vehicle speed / azimuth acquisition unit 222 described above are linked. Is feasible.
[0022]
【The invention's effect】
As described above, in the IP network in which the location information providing system 2 having the IP address can transmit and receive IP packets not only with the center 1 but also with the branch 3 and other location information providing systems 2 having the IP address, The position information detected by the positioning function 22, which is a function of the providing system 2, can be used in the center 1, the branch 3, and other position information providing systems 2.
[0023]
For example, in FIG. 1, when the location information providing system 2a requests the location information providing system 2b to provide the location information of the request type 2, the location information providing system 2b stores the latest location information until a specified time. It transmits to the information provision system 2a. The position information providing system 2a displays the position of the position information providing system 2b on the terminal 24a of the position information providing system 2a and also displays its own position, thereby continuing the position relationship between the position of the position information providing system 2b and itself. It is also possible to confirm it.
[0024]
Therefore, the present invention provides a position information providing system that can provide position information of a moving object via the IP network even when a moving object such as a vehicle moves between the networks on the IP network. It can be provided.
According to the first invention, it is possible to provide a position information providing system capable of recognizing the position of a moving body such as a vehicle equipped with the position information providing system of the present invention from a client connected to the IP network. It becomes possible.
[0025]
According to the second invention, it is possible to provide a position information providing system capable of recognizing the position of a moving body such as a vehicle equipped with the position information providing system of the present invention even in a place where positioning by GPS is difficult. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a location information providing system environment of the present invention. FIG. 2 is a diagram for explaining a positioning function. FIG. 3 is a location information storage processing flow. FIG. 4 is a location information request / response processing flow. Diagram explaining the conventional location information provision system environment [Explanation of symbols]
1, 6 Center 2a, 2b Location information providing system 2 Generic name of location information providing system 3, 8 Branch 7a, 7b Conventional location information providing system 7 Generic name of conventional location information providing system 10 HA
20a, 20b FA
11, 62 Server 12, 25a, 25b, 31, 63, 72a, 72b, 81 Client 13, 24a, 24b, 64, 73a, 73b Terminal 21a, 21b, 61, 71a, 71b, 74a, 74b Communication function 21 Communication function 22a, 22b Positioning function 22 Positioning function generic name 23a, 23b Position display function 75a, 75b Navigation device 75 Navigation device generic name

Claims (2)

A positioning function for storing position information detected by GPS;
A communication function for providing, via the IP network, location information requested to be provided via the IP network;
A position information providing system comprising: The position information providing system according to claim 1,
A position information providing system comprising a positioning function for storing position information detected by GPS, position information obtained by a moving speed and a moving direction of a moving body equipped with the position information providing system.

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