JP5366239B2 - Mobile body position tracking system and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable body location tracking system that achieves a distributed management of location information of a movable body on a network and a suppression of a traffic of the location information. <P>SOLUTION: In a movable body location tracking system 10, a hierarchy network has an upper server 20 and a lower server 40. A movable body to which a radio IC tag is attached is under a specific lower server 40A, and can communicate with a radio IC tag reader 60 set within a management area of arbitrary lower servers 40A-40D. An upper server 20A manages location information of the movable body under the lower servers 40C and 40D under another upper server 20B which has moved into its own range, and performs a transmission and reception with the other upper server 20B and its own lower servers 40A and 40B. The lower server 40A manages the location information of the movable body which moves within the management area and performs a transmission and reception with its own upper server 20A and the other lower server 40B thereof. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a moving body position tracking system and program configured by a computer that executes processing for tracking the position of a moving body, and connects hierarchical servers via a network to move within a large-scale facility or region. This can be used when the location information related to the current location information and movement history information of a moving object such as a person or an object is distributed and managed in the network.

  As a technique for tracking a current position of a mobile object by attaching or carrying a mobile terminal device with a wireless IC tag or a wireless LAN (Local Area Network) function to a mobile object such as a person or an object, Patent Document 1, Patent Techniques described in Document 2, Patent Document 3, and Non-Patent Document 1 are known.

  The technology described in Patent Document 1 is an extension of location information management technology for a mobile phone network, and a central database HLR (Home Location Register) installed in a central center and a regional database LLR installed near a base station. (Local Location Register). The HLR manages the information of the LLR where all the mobile units stay, and the LLR manages the information of the mobile units connected to the managed base station.

  The technique described in Patent Document 2 is such that when a mobile object having a communication terminal with a wireless LAN function such as a PDA (Personal Digital Assistant) enters the radio wave propagation area of the access point, the position of the access point to which the mobile object is connected Information, mobile unit identification information, and the like are transmitted to the central management center and centrally managed by the central management center.

  The technology described in Patent Document 3 connects to a tag within a predetermined distance range that allows the tag reader to read the tag when the mobile body equipped with the wireless IC tag moves in an area where the tag reader is scattered, The position information of the moving body is transmitted to the central monitoring center and centrally managed by the central monitoring center.

  In addition, the technology described in Non-Patent Document 1 divides a network into one or more areas and manages each area with a single server, and identifies a mobile object that carries a PDA or is equipped with a wireless IC tag. Each server manages the position information of the moving body that moves within the jurisdiction area, acquires the position information of the subordinate moving body that has moved to the outside area directly from the destination server, It is something to manage.

JP 2003-319436 A JP 2004-312079 A JP 2005-83781 A Fumiaki Inoue and Yuhei Zhang, “Position detection system integrating wireless LAN and RFID”, IPSJ Multimedia, Distributed, Cooperative and Mobile Symposium, July 2007

  According to the technique described in Patent Document 1, position information with different accuracy is distributed and managed by hierarchized HLRs and LLRs. However, the HLR needs to centrally manage information of all moving objects, and the number of moving objects is If it increases, the management load of the HLR increases, and if the movement of the moving body between the LLRs increases, the traffic of the position information transmitted from the LLR to the HLR increases.

  The techniques described in Patent Document 2 and Patent Document 3 require that the detailed position information of all the moving objects be transferred to the central management center or the central monitoring center, and the position information of the moving objects must be centrally managed at the central center. If the number of bodies increases, the management load of the position information of the moving body increases, and the traffic of the position information increases.

  In the technique described in Non-Patent Document 1, position information of a moving body that moves in each area is distributed and managed by a server in the area, but if the movement of a moving body between areas increases, it is transmitted to a subordinate server of the moving body. The traffic of the location information to be increased.

  An object of the present invention is to provide a mobile position tracking system and program capable of realizing distributed management of position information of mobile objects on a network and suppression of traffic of position information.

  The present invention relates to one or more upper servers connected to each other via a network, one or more lower servers connected to each other via a network under each upper server, a specific upper server and a specific lower server. At least one non-contact type wireless IC tag attached to a mobile object to be tracked depending on a server or a mobile terminal device with a wireless LAN function carried by the mobile body and one or more in the jurisdiction area of a lower server A wireless IC tag comprising a wireless IC tag reader that can be wirelessly connected to a wireless IC tag mounted on a mobile body that moves within the jurisdiction area, or an access point that can be wirelessly connected to a portable terminal device carried by the mobile body Alternatively, the portable terminal device is a tag identification information storage unit that stores tag identification information including a tag identifier that identifies a wireless IC tag, or a portable terminal that identifies a portable terminal device. Mobile terminal device identification information storage means for storing mobile terminal device identification information including a device identifier is provided, and the lower server is position information of a mobile body subordinate to the lower server itself that has entered the jurisdiction area of the lower server itself, the lower server Tag identification information includes the position information of a mobile object subordinate to another subordinate server that has entered into its own jurisdiction area, and the position information of a mobile object subordinate to the subordinate server itself that has entered the jurisdiction area of another subordinate server. Alternatively, the connection between the mobile terminal device identification information or the mobile body position information database stored in association with the mobile body identification information associated therewith and the wireless IC tag reader or the mobile terminal device connected with the wireless IC tag. Process for receiving position identification information and tag identification information or portable terminal device identification information transmitted from the access point where When a mobile object subordinate to the subordinate server itself or a mobile object subordinate to another subordinate server enters the jurisdiction area of the subordinate server itself and moves within this jurisdiction area, A process of storing the position information of the mobile body obtained from the position identification information received by the connection monitoring processing means in the mobile body position information database in association with the tag identification information, the mobile terminal device identification information or the mobile body identification information, Location information of the mobile unit directly transferred from the other subordinate server of the destination when the subordinate subordinate server enters the jurisdiction area of the other subordinate server under the subordinate server itself Is stored in the mobile body location information database in association with the tag identification information, the mobile terminal device identification information, or the mobile body identification information, and When a mobile body subordinate to the higher order server itself enters the jurisdiction area of any lower server under the higher order server other than the higher order server of the lower order server itself, the destination lower order server and the destination higher order server Executes a process of storing the position information of the mobile body transferred via the lower server's own upper server in the mobile body position information database in association with the tag identification information, the mobile terminal device identification information, or the mobile body identification information. And a moving body position information registration processing means.

  Here, the “mobile terminal device with a wireless LAN function” is, for example, a PDA or a mobile phone.

  The “mobile terminal device identifier for identifying the mobile terminal device” is, for example, a MAC (Medium Access Control) address of a mobile terminal device (PDA or the like) carried by the mobile body.

  Further, the “position identification information” is, for example, a tag reader identifier for identifying a wireless IC tag reader or a BSSID (Basic Service Set Identifier) of an access point.

  In such a mobile body location tracking system of the present invention, the mobile body location information database of each subordinate server contains the location information of the mobile body subordinate to the subordinate server itself that entered the jurisdiction area of the subordinate server itself, the subordinate server The location information of the mobile object subordinate to the other subordinate server that has entered into its own jurisdiction area, and the location information of the mobile object subordinate to the subordinate server itself that has entered the jurisdiction area of the other subordinate server are stored. The position information of the mobile body subordinate to the other lower server that entered the jurisdiction area of the lower server is not stored. That is, the position information of the mobile body subordinate to another lower server that has entered the jurisdiction area of another lower server is stored in a lower server other than itself. For this reason, it becomes possible to realize distributed management of the position information of the moving body, it is possible to reduce the management load of the position information of each server, and to improve the search speed of the position information of the moving body. It becomes possible.

  Further, when the mobile body moves within the jurisdiction of the subordinate server to which the mobile body is subordinate, the subordinate server to which the mobile body is subordinate is transmitted from the wireless IC tag reader or access point under the jurisdiction of the subordinate server itself. The position information of the moving body obtained from the position identification information is stored in the moving body position information database, and when the moving body moves to the jurisdiction area of another lower server below the upper server on which the moving body is subordinate, The subordinate server to which the moving body is subordinate acquires the position information of the moving body directly from the other subordinate servers of the movement destination and stores it in the moving body position information database. When moving to the jurisdiction area of any subordinate server under the superordinate server, the subordinate server to which the mobile entity is subordinated is changed from the subordinate destination server to the destination superordinate server and the mobile entity. It acquires the positional information of the movable body via the host server belonging stored in mobile location information database. Therefore, transmission of position information of the mobile unit is directly performed between the subordinate server to which the mobile unit is subordinate and another subordinate server under the subordinate server to which the mobile unit is subordinate, but the mobile unit is subordinate. Between the subordinate server and the subordinate server under the superordinate server other than the subordinate server on which the mobile unit is subordinate, the location information of the mobile unit is not transmitted directly, Transmission will occur. For this reason, most of the transmission of the location information of the mobile body is transmitted under the same upper server, that is, between the upper server and the lower server below it and between lower servers under the same upper server. Thus, it is possible to suppress the traffic of the position information flowing through the entire network, thereby achieving the object.

  Further, in the above-described mobile body position tracking system, the tag identification information or the mobile terminal device identification information includes, in addition to the tag identifier or the mobile terminal device identifier, an identifier of a specific upper server on which the mobile body is subordinate, The identifier of a specific lower server to which the mobile unit under the upper server is subordinate is included, and the lower server uses the tag identification information or the mobile terminal device identification information received by the connection monitoring processing means to The mobile that entered the jurisdiction is subordinate to the subordinate server itself, subordinate to another subordinate server under the subordinate server itself, or subordinate to a superordinate server other than the subordinate server itself. If the mobile unit is subordinate to another subordinate server under the subordinate server of the subordinate server itself, If the mobile server transfers its own identification information directly to the subordinate server to which the mobile unit is subordinate, and the mobile unit is subordinate to an upper server other than the subordinate server's own upper server, the location information of the mobile unit Mobile unit location information transfer processing means for executing processing for transferring the identification information of the lower server itself to the upper server of the lower server via the network. The upper server is transferred from the lower server of the upper server itself. The mobile body position information database that stores the identification information of the lower server as the position information of the mobile body corresponding to the tag identification information or the mobile terminal device identification information or the mobile body identification information, and the lower server of the upper server itself The identification information of the lower server as the position information of the transferred mobile object is the tag identification information or the mobile terminal device identification information, or Mobile body location information registration processing means for executing processing to be stored in the mobile body location information database of the upper server in association with the moving body identification information, and the lower level as the position information of the mobile body transferred from the lower server of the upper server itself When the server identification information is received, the identification information of the higher-level server itself is transferred from the other higher-level server as processing for transferring the identification information of the higher-level server over the network to the higher-level server to which the moving body is subordinate. A mobile body location information transfer processing means for executing processing for transferring the identification information of another upper server as the mobile body location information to a lower server to which the mobile body under the upper server itself is subordinate is provided. It is desirable.

  Here, “the identification information of the lower server as the position information of the mobile body” and “the identification information of the lower server as the position information of the mobile body transferred from the lower server of the upper server itself” are, for example, The server name, IP (Internet Protocol) address, and the like.

  Further, the “identification information of the upper server itself” and the “identification information of other upper server as the position information of the mobile object” are the name, IP address, etc. of the upper server.

  In such a configuration, the moving body location information database of the subordinate server to which the moving body is subordinated indicates that the moving body has moved to and within the jurisdiction area of the subordinate server to which the moving body is subordinate. When moving, it is possible to store up to the position of the wireless IC tag reader or access point as the position information of the moving body. When moving to the jurisdiction area of the server, the identification information of the destination lower server is stored as the position information of the moving body, and the moving body moves to the jurisdiction area of the upper server other than the upper server to which the moving body is dependent. When this is done, the identification information of the destination higher-level server is stored as the position information of the moving object. For this reason, the position information of the moving body stored in the moving body position information database of the subordinate server to which the moving body is subordinate becomes more approximate position information (position information indicating a wide range) as the moving body moves further away. It is possible to realize efficient information management. The mobile server location information database of the host server stores the location information of the external mobile body that has moved to the jurisdiction of the host server itself (a mobile body that is not subordinate to the host server itself) and depends on the host server itself. Since the position information of the moving body is not stored, efficient information management can be realized.

  Furthermore, in the above-mentioned mobile body position tracking system, the mobile body position information database of the lower server corresponds to each position information of the mobile body, and each wireless IC tag reader or each access point installed in the jurisdiction area of the lower server itself The mobile body location information registration processing means of the subordinate server also stores the mobile body subordinate to the subordinate server itself or a mobile subordinate to another subordinate server of the subordinate server itself. Corresponding to the position information of the mobile body obtained from the position identification information received by the connection monitoring processing means when entering into the cover range of each wireless IC tag reader or each access point installed in the jurisdiction area, wireless The connection start time to the IC tag reader or access point is stored in the mobile unit location information database of the lower server The subordinate server measures the connection time to each wireless IC tag reader or each access point installed in the jurisdiction of the subordinate server itself, and the mobile server or other subordinate to the subordinate server itself. When a mobile object subordinate to the subordinate server exits the coverage area of each wireless IC tag reader or each access point installed in the subordinate server's own jurisdiction area, the measured connection time is determined based on the position information of the mobile object and the connection. It is desirable to have a configuration including connection time measurement processing means for executing processing to be stored in the moving body location information database of the lower server in correspondence with the start time.

  In such a configuration, as long as the moving body moves within the jurisdiction of the same subordinate server, the connection start time and connection time are managed by this subordinate server. Outside, there is no connection start time and connection time traffic.

  In the mobile location tracking system described above, the mobile location information database of the subordinate server enters the jurisdiction area of another subordinate server under the superordinate server of the subordinate server itself in correspondence with the location information of the subordinate server itself. The mobile unit location information registration processing means of the lower level server is configured to store the time and stay time, and the mobile unit subordinate to the lower level server itself is within the jurisdiction area of other lower level servers under the higher level server of the lower level server itself. When entering, the entry time to the jurisdiction area of the other subordinate server of the destination that has been transferred directly from the other subordinate server of the destination with the location information of the mobile unit is made to correspond to the position information of the mobile unit. The subordinate server itself is configured to execute processing to be stored in the mobile unit location information database, and the subordinate server is subordinate to another subordinate server under the subordinate server's own superordinate server. When the mobile object leaves the jurisdiction area of the subordinate server itself, the measured stay time is transferred to other subordinate servers to which the mobile object depends. Subordinate server stay time measurement processing means for executing processing directly transmitted via the network, and the stay time transferred from the other subordinate server under the superordinate server of the subordinate server itself to which the mobile body is subordinate, It is desirable to have a configuration including lower server stay time registration processing means for executing processing to be stored in the mobile body position information database of the lower server corresponding to the position information and the entry time.

  In such a configuration, only when the moving body enters and exits from the jurisdiction area of another subordinate server below the upper server of the subordinate server to which the moving object is subordinate. However, traffic of entry time or stay time occurs between the other lower server of the destination and the subordinate server to which the mobile unit is subordinate. It is limited between subordinate servers.

  Further, in the above-described mobile body position tracking system, the lower server measures the stay time of the mobile body subordinate to the upper server other than the upper server of the lower server itself in the jurisdiction area of the lower server itself. The server is provided with lower server stay time measurement processing means for executing processing for transmitting the measured stay time to the upper server of the lower server itself via the network when the server leaves the jurisdiction area. The stay time in the jurisdiction area of the subordinate server transmitted from the subordinate server below itself is received, and the received stay time is associated with the position information of the mobile body and the entry time of the subordinate server in the jurisdiction area. It may be configured to include a lower server stay time registration processing means for executing processing to be stored in the mobile body location information database of the server itself. Masui.

  In such a configuration, only when the mobile body enters the jurisdiction area of the lower server below the upper server other than the upper server on which the mobile body is subordinate, and when the mobile body leaves the jurisdiction area, Traffic is generated between the destination lower server and the destination upper server, but even if the mobile body moves within the jurisdiction area of the destination lower server, traffic of entry time or stay time may occur. In addition, traffic does not occur unless the mobile object enters the jurisdiction area of a higher-level server other than the higher-level server to which this mobile object depends.

  Further, in the mobile location tracking system described above, the mobile location information database of the lower server corresponds to the location information of the mobile, and the entry time and stay in the jurisdiction area of the upper server other than the upper server of the lower server itself. The mobile unit location information registration processing means of the subordinate server is configured to store the time, and the mobile unit subordinate to the subordinate server itself is in charge of any subordinate server under the superordinate server other than the superordinate server to which the mobile unit is subordinate. When entering the area, the entry into the jurisdiction area of the destination upper server transferred together with the position information of the moving body from the destination lower server via the destination upper server and the upper server to which the moving body is subordinate. A process for storing the time in the mobile body location information database of the subordinate server itself in association with the location information of the mobile body is also executed. Measures the stay time of the upper server itself in the jurisdiction area of the mobile object subordinate to the other upper server, and when the mobile object leaves the jurisdiction area of the upper server itself, Receiving a stay time transmitted from a host server other than the host server itself on which the mobile body is subordinate, and a host server stay time measurement processing means for performing processing to be transmitted via the network to other host servers to which the subordinate is subordinate, Upper server stay time transfer processing means for executing a process of transferring the received stay time to a lower server to which a mobile unit under the upper server itself is subordinate. The lower server is transferred from the upper server of the lower server itself. In addition to executing a process of storing the staying time in the moving body position information database of the lower server in association with the moving body position information and the entry time. It is desirable to adopt a configuration provided with a server residence time registration means.

  In such a configuration, the moving destination is only when the moving object enters the jurisdiction area of the upper server other than the upper server of the subordinate server to which the moving object is subordinate, and when the moving object leaves the jurisdiction area. Between the lower server and the destination higher server, between the destination upper server and the upper server to which the mobile is subordinate, and between the upper server to which the mobile is subordinate and the subordinate server to which the mobile is subordinate. However, even if the moving object moves within the jurisdiction area of the higher-level server that is the moving destination, traffic of the entering time or staying time does not occur, and the moving object does not move. Traffic does not occur unless it enters from the outside into the jurisdiction area of the upper server other than the upper server on which the body depends.

  Further, in the above-described mobile body position tracking system, the lower-level server is input at the user terminal device as a search request signal for position information related to the current position information and / or movement history information of the mobile body from the user terminal device. Obtained by receiving tag identification information or mobile terminal device identification information or mobile body identification information, searching mobile body location information database using tag identification information or mobile terminal device identification information or mobile body identification information, and searching It is desirable to have a configuration including browsing processing means for executing processing for transmitting the position information of the moving body to the user terminal device via the network.

  When the browsing processing means is configured as described above, the position information of the moving objects distributed and managed in the moving object position information database of each subordinate server is used to perform an effective position information search process. Will be able to.

  And when it was set as the structure which provided the browsing process means in the low order server as mentioned above, the said browsing process means of a low order server is the position information of the said mobile body subordinate to the said low order server itself from a user terminal device. As a search request signal, a wireless IC tag reader or an access point level precision specification requesting display of position information up to the coverage of the access point, and a lower server requesting display of position information up to the jurisdiction area of the lower server When accepting at least three types of accuracy specification, that is, the accuracy specification of the level and the accuracy specification of the upper server level that requires the display of location information to the jurisdiction of the upper server, and the accuracy specification of the tag reader level or access point level is received There is a tag for location information within the jurisdiction of the subordinate server itself. The mobile server location information database of the subordinate server itself is searched by using the different information or the mobile terminal device identification information or the mobile body identification information, and the location information of the corresponding mobile body is acquired to perform display processing on the user terminal device. For the position information in the jurisdiction area of the other lower server under the upper server of the lower server itself, the position of the corresponding mobile body that sent the inquiry signal to the other lower server and was returned from the other lower server The information is received and displayed on the user terminal device, and the location information in the jurisdiction of the upper server other than the upper server of the lower server itself is sent to the upper server other than the upper server of the lower server itself. Transmitting and receiving the position information of the corresponding mobile body returned from the upper server other than the upper server of the lower server itself, and performing the display process on the user terminal device If the accuracy specification at the lower server level is accepted, the position information in the jurisdiction area of the lower server itself and the position information in the jurisdiction area of other lower servers under the upper server of the lower server itself are Using the tag identification information, the mobile terminal device identification information, or the mobile object identification information, search the mobile server location information database of the subordinate server itself to acquire the position information of the corresponding mobile object, and perform the display processing on the user terminal device For the location information within the jurisdiction of the upper server other than the upper server of the lower server itself, an inquiry signal is transmitted to the upper server other than the upper server of the lower server itself, and the upper server other than the upper server of the lower server itself The returned location information of the corresponding mobile unit is received and displayed on the user terminal device. If it is attached, the position information in the jurisdiction area of the subordinate server itself, the position information in the jurisdiction area of other subordinate servers under the superordinate server of the subordinate server itself, and the superordinate server other than the superordinate server of the subordinate server itself For any position information in the jurisdiction area, the tag identification information, the mobile terminal device identification information or the mobile object identification information is used to search the subordinate server's own mobile object position information database to obtain the position information of the corresponding mobile object If the inquiry signal from the upper server of the lower server itself is received together with information indicating the accuracy specification of the tag reader level or the access point level, the tag identification information or the mobile phone Search the moving body location information database of the subordinate server itself using the terminal device identification information or the moving body identification information. Executes the process of acquiring the location information of the relevant mobile unit and sending it back to the higher-order server that is the inquiry source, and the inquiry signals from other lower-level servers under the lower-level server's own higher-level server at the tag reader level or access point level accuracy When it is received together with information indicating the designation, the mobile server location information database of the subordinate server itself is searched using the tag identification information, the mobile terminal device identification information, or the mobile body identification information, and the location information of the corresponding mobile body is obtained. Information indicating the accuracy specification at the tag reader level or the access point level of the inquiry signal from the lower server under the other upper server. If it is received together with it, it sends an inquiry signal to the lower server under the upper server itself, and the upper server itself Receives the location information of the corresponding mobile unit returned from the lower server below, executes a process of returning to the lower server below the other higher-order server of the inquiry source, from the lower server below the other higher-level server If the inquiry signal is received together with information indicating the accuracy specification at the lower server level, the mobile server location information database of the upper server is searched using the tag identification information, the mobile terminal device identification information, or the mobile object identification information. It is desirable to have a configuration including browsing processing means for executing processing for acquiring the position information of the corresponding mobile body and returning it to the lower server under the other higher server of the inquiry source.

  In this way, when it is configured to receive at least three types of accuracy designation and search for the position information of the moving body and display it on the user terminal device, it can satisfy various requests of the position information user, Further, only when detailed location information of the moving body is necessary, it is only necessary to make an inquiry to the destination higher-level server and / or the destination lower-level server, so that the traffic of location information can be minimized. .

  The program of the present invention is for causing a computer to function as the mobile body position tracking system described above.

  The above-mentioned program or a part thereof is, for example, a magneto-optical disk (MO), a read-only memory (CD-ROM) using a compact disk (CD), a CD recordable (CD-R), a CD rewritable (CD -RW), read-only memory (DVD-ROM) using digital versatile disk (DVD), random access memory (DVD-RAM) using DVD, flexible disk (FD), magnetic tape, hard disk, It can be recorded on storage media such as read-only memory (ROM), electrically erasable and rewritable read-only memory (EEPROM), flash memory, and random access memory (RAM) for storage and distribution. And, for example, a local area network (LA ), A metropolitan area network (MAN), a wide area network (WAN), a wired network such as the Internet, an intranet, or an extranet, or a wireless communication network, or a combination thereof. It is also possible to carry it on a carrier wave. Furthermore, the above program may be a part of another program, or may be recorded on a recording medium together with a separate program.

  As described above, according to the present invention, the position information of the moving body that moves in the jurisdiction area of each subordinate server is distributed and managed by the subordinate server, and the hierarchical structure of the servers on the network is used. By limiting the position information traffic between servers, the position information management load of the entire system can be distributed, and the position information traffic flowing through the network can be reduced.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration of a moving body position tracking system 10 of the present embodiment. FIG. 2 shows a detailed configuration of main components of the moving body position tracking system 10. 3 shows the record structure of the mobile body location information database 30 of the upper server 20, FIG. 4 shows the structure of the server information table storage means 31 of the upper server 20, and FIG. FIG. 6 shows the configuration of the tag reader information table storage means 51, and FIG. 7 shows the configuration of the server information table storage means 52 of the lower server 40. 8 shows the configuration of the tag reader information storage means 63, and FIG. 9 shows the configuration of the tag identification information storage means 72. FIG. 10 shows the relationship between the jurisdiction area of the upper server 20 and the jurisdiction area of the lower server 40 of the mobile body position tracking system 10. Further, FIG. 11 is a sequence diagram showing an example of the flow of registration of position information and transmission / reception processing accompanying the movement of the mobile body 1, and FIG. FIG. 13 is a sequence diagram illustrating an example of providing position information of the moving body 1 in accordance with the accuracy of the position information specified by the position information user.

  <Overall Configuration of Moving Body Position Tracking System 10>

  In FIG. 1, the mobile body position tracking system 10 includes one or more upper servers 20 having the same function, and one or more lower servers 40 having the same function provided under each upper server 20. Are configured to be connected via the network 2. In this embodiment, as an example, two upper servers 20A and 20B are provided, two lower servers 40A and 40B are provided below the upper server 20A, and two lower servers are provided below the upper server 20B. Although 40C and 40D are provided, this is for convenience of explanation, and is not limited to this configuration, and the number of the upper servers 20 and the number of the lower servers 40 are arbitrary.

  In addition, one or more wireless IC tag readers 60 are connected to each of the lower servers 40 via the network 2. As shown in FIGS. 1 and 10, the wireless IC tag reader 60 is provided to perform wireless communication with a non-contact type wireless IC tag 70 attached to the moving body 1, and the jurisdiction area of the lower server 40 is The lower server 40 is composed of an area in which the cover ranges of all the wireless IC tag readers 60 connected to the lower server 40 are combined, and the jurisdiction of the upper server 20 is all the lower servers connected under the upper server 20 itself. It consists of an area that combines 40 jurisdictions. In this embodiment, as an example, two wireless IC tag readers 60A and 60B are connected to the lower server 40A, two wireless IC tag readers 60C and 60D are connected to the lower server 40B, and the lower server 40C includes The two wireless IC tag readers 60E and 60F are connected, and the lower server 40D is connected to the two wireless IC tag readers 60G and 60H. However, the present invention is not limited to this configuration. The number of wireless IC tag readers 60 connected to is arbitrary.

  The mobile body position tracking system 10 according to the present embodiment targets a large-scale system such as the position tracking of school children covering the entire municipality and the position tracking of objects in a large storage facility composed of a plurality of warehouses. This is a moving body position tracking system in which a wireless IC tag 70 is attached to or carried around a moving body such as a slab. For example, each building or school district is set as one area and managed by one subordinate server 40 (however, one subordinate server 40 may be constituted by a plurality of computers), and a plurality of neighboring buildings or A plurality of areas composed of a plurality of neighboring school districts can be collectively managed by one upper server 20 (however, one upper server 20 may be constituted by a plurality of computers). Users of location information such as parents and warehouse managers are only interested in children who attend a specific school district or items belonging to a specific building. By submitting a search request to the subordinate server 40 that is subordinate, it is possible to acquire position information of a mobile object (such as a school attendant or a building belonging) to be tracked.

  In this embodiment, the network 2 includes, as an example, the Internet 3, upper LANs 5A and 5B connected to the Internet 3 through routers 4A and 4B, upper LANs 5A and 5B, and routers 6A, 6B, and 6C. It is composed of lower LANs 7A, 7B, 7C and 7D connected via 6D. Here, for convenience of explanation, for example, the upper LAN 5A is a LAN installed in the university A, the upper server 20A of the university A is connected, and the lower LAN 7A is a LAN installed in the X department of the university A. Yes, the lower server 40A of the X department of A University and the wireless IC tag readers 60A and 60B are connected, and the lower LAN 7B is a LAN installed in the Y department of A University, and the lower server 40B of the Y department of A University It is assumed that the wireless IC tag readers 60C and 60D are connected. Further, for example, the upper LAN 5B is a LAN installed in the University B, the upper server 20B of the University B is connected, and the lower LAN 7C is a LAN installed in the Z department of the University B. The lower server 40C of the Z department and the wireless IC tag readers 60E and 60F are connected, and the lower LAN 7D is a LAN installed in the W department of the B university, the lower server 40D of the W department of the B university and the wireless IC tag reader 60G, It is assumed that 60H is connected.

  Note that, as in the example shown in FIG. 1, the network 2 takes into account the geographical factors of the area to be managed and the ease of network environment construction, and the network that connects the upper servers 20 is the Internet 3 or the like. The network below the upper server 20 (network connecting the upper server 20 and the lower server 40 below it and between the lower servers 40 below the same upper server 20) is a LAN ( (Local Area Network) or an intranet is preferable, but is not limited to the example shown in FIG. For example, the network 2 has various forms such as a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), the Internet, an intranet, an extranet, or a combination thereof. Regardless of whether it is wired or wireless, or a mixture of wired and wireless, in short, information at a certain speed between multiple points (regardless of the length of distance) As long as it is capable of transmitting.

  Further, user terminal devices 80 are installed at various locations on the network 2. This user terminal device 80 may be installed in any part of the network 2, and may be installed in any of the Internet 3, the upper LANs 5A and 5B, and the lower LANs 7A to 7D, for example.

  Then, the role of the upper server 20 manages the positional information of the external mobile body that has moved to the jurisdiction of the upper server 20 itself (the mobile body that is not subordinate to the upper server 20 itself), and the other upper server 20 And transmitting / receiving position information to / from the lower server 40 under the upper server 20 itself. The role of the lower server 40 is the position information of the mobile body subordinate to the subordinate server 40 itself that moves in the jurisdiction area of the subordinate server 40 and other subordinate server 40, and the subordinate server 40 itself. It manages the position information of an external mobile body that has moved to the jurisdiction area (a mobile body that is not subordinate to the lower server 40 itself), and the upper server 20 of the lower server 40 itself and the upper server 20 of the lower server 40 itself. This is to perform transmission / reception of position information with other lower servers 20 below. Specifically, it is as follows.

  <Configuration of host server 20>

  In FIG. 2, each upper server 20 (20 </ b> A, 20 </ b> B) is configured by one or a plurality of computers, and is connected to the processing means 21 for executing the management processing of the position information of the moving body and the processing means 21. The mobile body position information database 30 and the server information table storage means 31 are provided. Then, the processing means 21 includes a mobile body location information registration processing means 22, a mobile body location information transfer processing means 23, an upper server stay time measurement processing means 24, an upper server stay time transfer processing means 25, and a lower server stay. The time registration processing unit 26 and the browsing processing unit 27 are included.

  The mobile body location information registration processing means 22 includes tag identification information β (see FIG. 9) transferred from the lower server 40 of the upper server 20 itself, the name and IP address of the lower server 40 as location information of the mobile body, In addition, the name and IP address of the upper server 20 itself are received using the server information table received in the server information table storage means 31 (see FIG. 4) of the upper server 20 and receiving the entry time of the lower server 40 into the jurisdiction area. The identification of the received tag is obtained by acquiring the address and the location information of the mobile body (name and IP address of the upper server 20 itself, and name and IP address of the lower server 40) and the entry time of the lower server 40 into the jurisdiction area Corresponding to the information β, it is stored in the moving body location information database 30 (see FIG. 3) of the host server 20. The process is executed. This process corresponds to steps S6 and S10 in FIG. 11 (see FIG. 12).

  The mobile body position information transfer processing means 23 is configured to receive tag identification information β transferred from the lower server 40 (for example, the lower server 40C) of the upper server 20 itself (for example, the upper server 20B), and the lower position as the position information of the mobile body. When the name and IP address of the server 40 (for example, the lower server 40C) and the time of entry into the jurisdiction area of the lower server 40 (for example, the lower server 40C) are received, the mobile object for the tag identification information β received Is not stored in the mobile body location information database 30 (see FIG. 3) of the host server 20, that is, when the data about the tag identification information β is received for the first time (for example, step of FIG. 11). In the case of S6), the server stored in the server information table storage means 31 (see FIG. 4) of the upper server 20 Using the information table, the name and IP address of the higher-level server 20 itself (for example, the higher-level server 20B) are acquired, and the higher-level server 20 itself (for example, the higher-level server 20B) as the tag identification information β and the position information of the mobile body Network 2 (Internet 3) to the upper server 20 (for example, the upper server 20A) to which the mobile body is subordinate, the name and IP address of the mobile phone and the time of entry of the upper server 20 itself (for example, the upper server 20B) into the jurisdiction area. The process of transferring via is executed. This process corresponds to step S7 in FIG. Note that the mobile object position information transfer processing unit 23 determines that the received tag identification information β is already stored in the mobile object position information database 30 (see FIG. 3) of the host server 20, that is, tag identification information. If it is not the first time that data about β has been received (for example, in the case of step S10 in FIG. 11), transfer processing to the upper server 20 (for example, the upper server 20A) to which the mobile object is subordinate is not performed.

  In addition, the mobile body location information transfer processing unit 23 includes tag identification information β transferred from another host server (for example, the host server 20B), another host server 20 (for example, the host server) as the mobile body location information. 20B), the name and IP address, and the time of entry into the jurisdiction area of the other upper server 20 (for example, the upper server 20B) are received and moved under the upper server 20 itself (for example, the upper server 20A). A process of transferring to the lower level server 40 (for example, the lower level server 40A) to which the body is subordinated via the network 2 (the higher level LAN 5A and the lower level LAN 7A) is executed. This process corresponds to step S8 in FIG. 11 (see FIG. 12).

  The host server stay time measurement processing means 24 calculates the stay time in the jurisdiction area of the host server 20 itself (for example, the host server 20B) for a mobile body subordinate to another host server 20 (for example, the host server 20A). Counting from the entry time to the jurisdiction area (the entry time to the jurisdiction area of the subordinate server 40 that entered first among the jurisdictions of the subordinate servers 40 under the superordinate server 20 itself) When leaving the jurisdiction area of the server 20 itself (for example, the upper server 20B), the measured staying time together with the tag identification information β is transferred to another upper server (for example, the upper server 20A) to which the mobile body is subordinate. A process of transmitting via (Internet 3) is executed. At this time, the stay time of the upper server 20 itself (for example, the upper server 20B) in the jurisdiction area is the time from the entry time to the exit time of the jurisdiction area. , The time when it is determined that the wireless IC tag 70 attached to the mobile body does not stay in the jurisdiction area of any lower server 40 under the upper server 20 itself (for example, the upper server 20B), that is, The exit time from the jurisdiction area of the subordinate server 40 staying last among the jurisdiction areas of the subordinate servers 40 under the superordinate server 20 itself (the entry time to the jurisdiction area of the subordinate server 40 staying last) It is determined that there is no entry to another lower server 40 under the upper server 20 itself even if a predetermined time elapses from the time obtained by adding the stay time in the jurisdiction of the lower server 40). Is a time when it is.

  The upper server stay time transfer processing means 25 receives the stay time and tag identification information β transmitted from the upper server 20 (for example, the upper server 20B) other than the upper server 20 itself (for example, the upper server 20A) to which the mobile object belongs. And the received stay time and the tag identification information β are transferred to the lower server 40 (for example, the lower server 40A) to which the mobile body under the upper server 20 itself (for example, the upper server 20A) is subordinate. And a process of transferring via the lower LAN 7A).

  The lower server stay time registration processing means 26 is connected to the lower server 40 (for example, the lower server 40C) transmitted from the lower server 40 (for example, the lower server 40C) under the upper server 20 itself (for example, the upper server 20B). The stay time in the jurisdiction area and the tag identification information β are received, and the received stay time is changed to the tag identification information β, the location information of the moving body (name and IP address of the host server 20 to be moved, and the destination The name and IP address of the lower server 40) and the moving body location information database of the upper server 20 itself (for example, the upper server 20B) in association with the entry time of the lower server 40 (for example, the lower server 40C) into the jurisdiction area 30 (see FIG. 3) is executed.

  The browsing processing unit 27 cooperates with the browsing processing unit 49 of the subordinate server 40 and sends the position information of the corresponding mobile body via the network 2 in response to an inquiry signal transmitted from the subordinate server 40 via the network 2. The process of returning to the lower server 40 is executed. Note that the processing by the browsing processing unit 27 may be realized by a computer that is installed on a Web server and independent from a computer that is responsible for the other functions of the host server 20.

  Specifically, the browsing processing means 27 sends an inquiry signal from a lower server 40 (for example, the lower server 40A) under another upper server 20 (for example, the upper server 20A) together with information indicating the tag reader level accuracy designation. If received, an inquiry signal is transmitted to the lower server 40 (for example, the lower servers 40C and 40D) under the upper server 20 itself (for example, the upper server 20B), and the upper server 20 itself (for example, the upper server 20B). The position information (name and IP address of the upper server 20, the name and IP address of the lower server 40, and the position information of the corresponding mobile body returned from the lower server 40 (for example, the lower servers 40C and 40D) below Name and installation position information about the wireless IC tag reader 60), connection start time and connection And the received location information of the moving body is returned to the lower server 40 (for example, the lower server 40A) under the other higher server 20 (for example, the upper server 20A) of the inquiry source via the network 2. Execute the process. This process corresponds to steps S22 to S27 in FIG.

  In addition, the browsing processing means 27 has received an inquiry signal from a lower server 40 (for example, the lower server 40A) under another upper server 20 (for example, the upper server 20A) together with information indicating the accuracy specification at the lower server level. In this case, the mobile server location information database 30 (see FIGS. 3 and 12) of the host server 20 itself is searched using the tag identification information β, and the location information of the corresponding mobile unit (name and IP of the host server 20). The address, the name and IP address of the lower server 40), the entry time and the stay time are acquired, and the acquired location information of the moving body is sent via the network 2 to the other higher server 20 (for example, the inquiry source) , A process of returning to the lower server 40 (for example, the lower server 40A) under the upper server 20A) is executed. This process corresponds to steps S16 and S17 in FIG.

  The moving body position information database 30 stores the position information of the moving body transferred from the lower server 40 of the upper server 20 itself. That is, as shown in FIG. 3, the mobile body location information database 30 includes tag identification information β for external mobile bodies that have moved to the jurisdiction of the upper server 20 itself (mobile bodies that are not subordinate to the upper server 20 itself). (See FIG. 9), location information of the moving body (name and IP address of the upper server 20 itself where the moving body stays, and name and IP address of the lower server 40 where the moving body stays), and the lower server The entry time and the stay time into the 40 jurisdiction areas are stored in association with each other. Note that the moving body position information database 30 does not store the name and installation position name of the wireless IC tag reader 60. Further, the mobile body position information database 30 does not store the position information of mobile bodies subordinate to the higher order server 20 itself.

    As shown in FIG. 4, the server information table storage means 31 includes an identifier, name, and IP address for the upper server 20 itself, and an identifier, name, and IP address for the lower server 40 under the upper server 20 itself. A server information table configured by identifiers, names, and IP addresses for other upper servers 20 is stored. Note that the name given to the upper server 20 is the only name in the entire mobile body location tracking system 10, and this name and IP address are used to identify the upper server 20. The name given to the lower server 40 is a unique name under the upper server 20 of the lower server 40 (however, it may be a unique name for the entire system 10). This name and IP address are used.

  <Configuration of Lower Server 40>

  In FIG. 2, each of the lower servers 40 (40 </ b> A to 40 </ b> D) is configured by one or a plurality of computers, and is connected to the processing unit 41 that executes the management process of the position information of the moving body, and the processing unit 41. Mobile body position information database 50, tag reader information table storage means 51, and server information table storage means 52. Then, the processing means 41 includes a connection monitoring processing means 42, a mobile body location information registration processing means 43, a mobile body location information transfer processing means 44, a connection time measurement processing means 45, and a lower server stay time measurement processing means 46. And a lower server stay time registration processing means 47, an upper server stay time registration processing means 48, and a browsing processing means 49.

  The connection monitoring processing means 42 includes a tag reader identifier α (see FIG. 8) and tag identification information, which are position identification information transmitted from the wireless IC tag reader 60 connected to the wireless IC tag 70 attached to the moving body. The process of receiving β (see FIG. 9) is executed. In this embodiment, the tag reader identifier α and the tag identification information β are transmitted from the wireless IC tag reader 60 at a predetermined time interval such as every second. However, the connection monitoring processing means 42 performs wireless IC at a timing determined by itself. A configuration in which a transmission request is made to the tag reader 60 may be adopted. The processing by the connection monitoring processing means 42 may be realized by a computer independent of a computer that installs a tag monitoring server and takes charge of other functions of the lower server 40.

  The moving body position information registration processing means 43 associates the position information of the moving body and the connection start time or approach time associated therewith with the tag identification information, and the moving body position information database 50 of the lower server 40 (see FIG. 5). The processing to be stored in is executed.

  Specifically, the mobile body location information registration processing means 43 is used when a mobile body subordinate to the subordinate server 40 itself or a mobile body subordinate to another subordinate server 40 enters the jurisdiction area of the subordinate server 40 itself. When moving within the jurisdiction area, a wireless connection is established by using the tag reader information table stored in the tag reader information table storage unit 51 (see FIG. 6) from the tag reader identifier α received by the connection monitoring processing unit 42. While acquiring the name and installation position name about the IC tag reader 60 and using the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40, the upper server 20 of the lower server 40 itself. As well as the name and IP address of the subordinate server 40 itself. The acquired position information of the moving body (name and IP address of the lower server 40 itself for the upper server 20, the name and IP address of the lower server 40 itself, and the name and installation position name of the wireless IC tag reader 60) and A process of storing the connection start time in the moving body position information database 50 (see FIG. 5) of the lower server 40 in association with the received tag identification information β is executed. This process corresponds to steps S1, S2, S3, S5, and S9 in FIG. 11 (see FIG. 12).

  In addition, the mobile body location information registration processing unit 43 is configured so that the mobile body subordinate to the subordinate server 40 itself (for example, the subordinate server 40A) is another subordinate under the upper server 20 (for example, the upper server 20A) of the subordinate server 40 itself. When the server 40 (for example, the lower server 40B) enters the jurisdiction area, the tag identification information β transferred directly from the other lower server 40 (for example, the lower server 40B), the other destination The name and IP address of the subordinate server 40 (for example, subordinate server 40B) and the time of entry into the jurisdiction area of the other subordinate server 40 (for example, subordinate server 40B) of the destination are received. Using the server information table stored in the information table storage means 52 (see FIG. 7), the other lower server 40 (for example, the lower server) of the movement destination 0B), that is, the name and IP address of the upper server 20 (for example, the upper server 20A) of the lower server 40 itself (for example, the lower server 40A), and the location information of the moving body (other destinations) The name and IP address of the subordinate server 40 of the subordinate server 40 and the name and IP address of the other subordinate server 40 of the movement destination) and the entry time are associated with the received tag identification information β. Processing to be stored in the moving body position information database 50 (see FIG. 5) is executed. This process corresponds to step S4 in FIG. 11 (see FIG. 12).

  Furthermore, the mobile body location information registration processing unit 43 is configured such that the mobile body subordinate to the lower server 40 itself (for example, the lower server 40A) is the host server 20 (for example, the upper server 20B) other than the upper server 20 of the lower server 40 itself. Moves from the destination lower server 40 (for example, any of the lower servers 40C, 40D) when entering the jurisdiction area of any lower server 40 (for example, any of the lower servers 40C, 40D) The tag identification information β transferred via the previous upper server 20 (for example, the upper server 20B) and the upper server 20 (for example, the upper server 20A) of the lower server 40 itself, the destination upper server 20 (for example, the upper server 20) Receiving the name and IP address of the server 20B) and the time of entry into the jurisdiction area of the destination higher-level server 20; The position information of the moving object (name and IP address of the higher-order server 20 to be moved) and the entry time are stored in the moving object position information database 50 (see FIG. 5) of the lower-order server 40 in association with the received tag identification information β. Execute the process. This process corresponds to step S8 in FIG. 11 (see FIG. 12).

  The mobile body location information transfer processing means 44 directly transmits the location information of the mobile body and the approach time incidental thereto to the lower server 40 to which the mobile body under the upper server 20 of the lower server 40 itself is subordinate via the network 2. And the process of transferring to the upper server 20 of the lower server 40 itself via the network 2.

  Specifically, the mobile body position information transfer processing means 44 is dependent on the mobile body attached with the connected wireless IC tag 70 included in the tag identification information β (see FIG. 9) received by the connection monitoring processing means 42. The comparison processing is performed using the higher-level server identifier β1 and the lower-level server identifier β2 and the server information table storage means 52 (see FIG. 7) stored in the lower-level server 40. The mobile object that has entered the jurisdiction of the subordinate server 40 itself is subordinate to the subordinate server 40 itself, subordinate to another subordinate server 40 under the superordinate server 20 of the subordinate server 40 itself, or the subordinate server 40. A process of determining whether it is subordinate to any upper server 20 other than its own upper server 20 is executed.

  Then, the mobile body location information transfer processing means 44 is configured so that the mobile body that has entered the jurisdiction area of the lower server 40 itself (for example, the lower server 40B) is the upper server 20 of the lower server 40 itself (for example, the lower server 40B). When subordinate to another lower server 40 (for example, the lower server 40A), the tag identification information β, the name and IP address of the lower server 40 itself (for example, the lower server 40B) as the position information of the mobile object And the entry time of the subordinate server 40 itself (for example, the subordinate server 40B) into the jurisdiction area (to each of the radio IC tag readers 60 that are installed in the jurisdiction area of the subordinate server 40 itself, to the radio IC tag reader 60 connected first. Connection start time) to the subordinate server 40 (for example, subordinate server 40A) to which the mobile body is subordinate, 5A and lower LAN7A, 7B) executes processing of transferring directly through. This process corresponds to step S4 in FIG. 11 (see FIG. 12).

  Further, the mobile body location information transfer processing means 44 is configured so that the mobile body that has entered the jurisdiction area of the lower server 40 itself (for example, the lower server 40C) is other than the upper server 20 of the lower server 40 itself (for example, the lower server 40C). 2, the tag identification information β, the name and IP address of the lower server 40 itself (for example, the lower server 40C), and the lower server 40 itself ( For example, the entry time of the subordinate server 40C) into the jurisdiction area (connection start time to the radio IC tag reader 60 connected first among the radio IC tag readers 60 installed in the jurisdiction area of the subordinate server 40 itself) The lower server 40 itself (for example, the lower server 40C) to the upper server 20 (for example, the upper server 20B) to the network 2 ( It performs a process of transferring via positions LAN5B and lower LAN7C). This process corresponds to steps S6 and S10 in FIG. 11 (see FIG. 12). In the determination processing by the moving body position information transfer processing unit 44, the mobile body that has entered the jurisdiction area of the lower server 40 itself (for example, the lower server 40C) from the tag identification information β is the lower server 40 itself (for example, Although it can be determined that the subordinate server is subordinate to any one of the upper servers 20 other than the upper server 20 (for example, the upper server 20B), the name or IP address of the upper server 20 to which the mobile object belongs is specified. Since it cannot be performed, the transfer process of the lower server 40 itself to the upper server 20 is performed as described above.

  Note that the moving body position information transfer processing unit 44 does not perform transfer processing when a moving body that has entered the jurisdiction of the lower server 40 itself is subordinate to the lower server 40 itself.

  The connection time measurement processing unit 45 receives information indicating the presence / absence of connection from the connection monitoring processing unit 42, and determines the connection time to each wireless IC tag reader 60 installed in the jurisdiction area of the lower server 40 itself from the connection start time. Counting and measuring, the mobile body subordinate to the subordinate server 40 itself or the mobile body subordinate to the other subordinate server 40 has left the coverage area of each wireless IC tag reader 60 installed in the jurisdiction area of the subordinate server 40 itself The measured connection time (the time from the connection start time to the exit time), the tag identification information β, the position information of the moving body (name and IP address of the upper server 20 of the lower server 40 itself, the lower server 40 itself) Name and IP address, and wireless IC tag reader 60 name and installation position name), and at the start of connection In correspondence with and executes a process of storing in the mobile location information database 50 of the subordinate server 40 (see FIG. 5). At this time, the connection time is the time from the connection start time to the exit time, but the exit time is first obtained by the connection monitoring processing means 42 such as reception of data such as tag identification information β from the wireless IC tag reader 60. It may be the time when the wireless IC tag reader 60 cannot be obtained, or the wireless IC tag reader 60 can be connected even if a predetermined time interval (time interval of data transmission from the wireless IC tag reader 60) elapses from the time when it cannot be obtained first. It may be the elapsed time when it cannot be confirmed.

  The subordinate server stay time measurement processing means 46 is a subordinate server 40 for a mobile object subordinate to another subordinate server 40 (eg, subordinate server 40A) under the superordinate server 20 of the subordinate server 40 itself (eg, subordinate server 40B). The stay time in the jurisdiction area of itself (for example, the lower server 40B) is set as the entry time to the jurisdiction area (with the wireless IC tag reader 60 connected first among the wireless IC tag readers 60 installed in the jurisdiction area) When the mobile object leaves the jurisdiction area of the subordinate server 40 itself (for example, the subordinate server 40B), the staying time measured (the time from the entry time to the exit time) is counted. Together with the tag identification information β, the network 2 (upper LAN 5A and Fine lower LAN7A, 7B) and executes the process of transmitting directly through. At this time, the stay time is the time from the entry time to the exit time. However, the exit time cannot receive any data such as tag identification information β from any wireless IC tag reader 60 by the connection monitoring processing means 42. The first time may be used, or even if a predetermined time interval (data transmission time interval from the wireless IC tag reader 60) elapses from the first time, the connection with any wireless IC tag reader 60 is confirmed. It is good also as the elapsed time when it cannot be carried out.

  In addition, the lower server stay time measurement processing means 46 is the lower server 40 itself for the mobile body subordinate to the upper server 20 (for example, the upper server 20A) other than the upper server 20 of the lower server 40 itself (for example, the lower server 40C) The stay time in the jurisdiction area (for example, the lower server 40C) is defined as the time of entry into the jurisdiction area (connection with the first wireless IC tag reader 60 connected among the wireless IC tag readers 60 installed in the jurisdiction area) When the mobile object leaves the jurisdiction area of the subordinate server 40 itself (for example, the subordinate server 40C), the measured staying time together with the tag identification information β For example, the network 2 (the host LAN 5B and the host server 20C) is connected to the host server 20 (for example, the host server 20B). It performs a process of transmitting through the position LAN7C).

  The subordinate server stay time registration processing means 47 has been transferred from another subordinate server 40 (eg, subordinate server 40B) under the superordinate server 20 of the subordinate server 40 itself (eg, subordinate server 40A) on which the mobile object is subordinate. The stay time and the tag identification information β are received, and the received stay time is changed to the tag identification information β, the position information of the moving body (name and IP address of the upper server 20 of the lower server 40 of the movement destination, and the lower position of the movement destination The name and IP address of the server 40) and the moving body location information database 50 of the subordinate server 40 itself (for example, subordinate server 40A) corresponding to the entry time of the destination subordinate server 40 into the jurisdiction area (see FIG. 5) ) Is stored.

  The upper server stay time registration processing means 48 is the destination upper server 20 (for example, the upper server 20B) transferred from the upper server 20 (for example, the upper server 20A) of the lower server 40 itself (for example, the lower server 40A). The name of the destination upper server 20 (for example, the upper server 20B) is received as the tag identification information β and the position information of the moving object. And the IP address, and the moving body location information database 50 (FIG. 5) of the lower server 40 itself (for example, the lower server 40A) corresponding to the entry time of the upper server 20 (for example, the upper server 20B) to the jurisdiction area The processing to be stored in (see) is executed.

  The browsing processing means 49 uses the tag identification information β or the moving object input from the user terminal device 80 as a search request signal for position information related to the current position information and / or movement history information of the moving object from the user terminal device 80. When the identification information is received and the mobile object identification information is received, a conversion table (a table that defines the correspondence between the tag identification information β and the mobile object identification information) stored in a conversion table storage unit (not shown) is used. The mobile body position information database 50 (see FIG. 5) of the subordinate server 40 is converted from the mobile body identification information to the tag identification information β and the received tag identification information β or the tag identification information β obtained by the conversion. Further, if necessary, it is necessary to search the mobile body location information database 30 (see FIG. 3) of the upper server 20 with respect to the browsing processing means 27 of the upper server 20. A process of transmitting data such as position information of the mobile body obtained by searching and searching to the user terminal device 80 via the network 2 is executed. At this time, the search request signal for the position information of the moving object from the user terminal device 80 is transmitted to the lower server 40 to which the moving object to be tracked is subordinate. In the search of movement history information, designation of a period of movement history information input at the user terminal device 80 is also accepted, and data such as position information within the period is stored in the mobile body position information databases 30 and 50 (FIG. 3, FIG. 3). (See FIG. 5). Note that the processing by the browsing processing unit 49 may be realized by a computer that is installed on a Web server and independent of a computer that is responsible for the other functions of the lower server 40. Further, the processing by the browsing processing means 49 may be realized by installing a mail server and transmitting the position information of the mobile body to the user terminal device 80 by e-mail.

  Here, as the moving body identification information, for example, if the moving body is a student or an employee, the name of the student or employee, a telephone number, a student ID number, an employee code, etc. can be adopted. For example, a moving body name, a manufacturing number, etc. are employable. Note that the moving body identification information may be the same as the tag identification information β, and in this case, it is not necessary to perform conversion processing using a conversion table.

  Specifically, the browsing processing means 49 displays the position information up to the cover range of the wireless IC tag reader 60 as a search request signal for the position information of the mobile body subordinate to the lower server 40 itself from the user terminal device 80. Specification of accuracy of tag reader level to be requested, specification of accuracy of lower server level requesting display of position information up to the jurisdiction area of lower server 40, and upper server level requesting display of position information up to jurisdiction area of upper server 20 A process of receiving, via the network 2, selection information by the position information user from among the three types of precision designations with the precision designation and the four choices without precision designation.

  When the browsing processing means 49 receives the tag reader level accuracy specification, the position information in the jurisdiction area of the lower server 40 itself uses the tag identification information β for the position information in the subordinate server 40 own mobile body position information database. 50 (refer to FIG. 5 and FIG. 12) and the position information of the corresponding mobile unit (name and IP address for the upper server 20, name and IP address for the lower server 40, and name for the wireless IC tag reader 60) And the installation position information), the connection start time and the connection time, and the process of transmitting the acquired position information of the moving body to the user terminal device 80 via the network 2 is executed. This process corresponds to steps S19 and S28 in FIG.

  In addition, when receiving the tag reader level accuracy specification, the browsing processing means 49 of the lower server 40 (for example, the lower server 40B) under the upper server 20 of the lower server 40 itself (for example, the lower server 40A). For position information in the jurisdiction area, an inquiry signal is transmitted to another lower server 40 (for example, the lower server 40B), and the corresponding mobile object returned from the other lower server 40 (for example, the lower server 40B) is returned. Receive and receive position information (name and IP address for the upper server 20, name and IP address for the lower server 40, and name and installation position information for the wireless IC tag reader 60), connection start time and connection time The position information and the like of the moved mobile body is transmitted to the user terminal device 80 via the network 2. Process to run. The inquiry process at this time is a process corresponding to steps S20 and S21 in FIG.

  Further, the browsing processing means 49, when accepting the tag reader level accuracy designation, within the jurisdiction area of the upper server 20 (for example, the upper server 20B) other than the upper server 20 of the lower server 40 itself (for example, the lower server 40A). For the location information of the lower server 40, an inquiry signal is transmitted to the upper server 20 other than the upper server 20 of the lower server 40 itself (eg, the upper server 20B), and the upper server 20 other than the upper server 20 of the lower server 40 itself (eg, the upper server 20) Position information of the corresponding mobile body returned from the server 20B) (name and IP address of the upper server 20, name and IP address of the lower server 40, and name and installation position information of the wireless IC tag reader 60) And the connection start time and connection time were received and received The position information of the moving object or the like, and executes a process of transmitting to the user terminal device 80 via the network 2. The inquiry process at this time is a process corresponding to steps S22 and S27 in FIG.

  Then, when the accuracy designation at the lower server level is received, the browsing processing means 49 receives the position information in the jurisdiction area of the lower server 40 itself (for example, the lower server 40A) and the lower server 40 itself under the upper server 20. For the position information in the jurisdiction area of the other lower server 40 (for example, the lower server 40B), the mobile body position information database 50 (FIG. 5) of the lower server 40 itself (for example, the lower server 40A) using the tag identification information β. , Refer to FIG. 12) to obtain the position information (name and IP address of the upper server 20 and name and IP address of the lower server 40) of the corresponding mobile object, and the acquired position information of the mobile object Is transmitted to the user terminal device 80 via the network 2. This process corresponds to steps S15 and S18 in FIG. It should be noted that the mobile server location information database 50 (see FIGS. 5 and 12) of the lower server 40 itself (for example, the lower server 40A) stores the upper server 20 of the lower server 40 itself as long as the location information is at the lower server level. Since the position information in the jurisdiction area of the other lower server 40 (for example, the lower server 40B) is also stored, the other lower server 40 (for example, the lower server) under the upper server 20 of the lower server 40 itself is stored. There is no need to query the server 40B).

  In addition, when the accuracy designation at the lower server level is received, the browsing processing unit 49 has jurisdiction over the upper server 20 (for example, the upper server 20B) other than the upper server 20 of the lower server 40 itself (for example, the lower server 40A). Is sent to a higher level server 20 other than the higher level server 20 of the lower level server 40 (for example, the higher level server 20B), and the higher level server 20 other than the higher level server 20 of the lower level server 40 itself (for example, The position information of the corresponding mobile body received from the upper server 20B) (name and IP address of the upper server 20 and name and IP address of the lower server 40) is received and received. Is transmitted to the user terminal device 80 via the network 2. The inquiry process at this time is a process corresponding to steps S16 and S17 in FIG.

  Then, the browsing processing means 49 receives the position information in the jurisdiction area of the lower server 40 itself, the jurisdiction of the other lower server 40 under the upper server 20 of the lower server 40 itself when the accuracy specification at the upper server level is received. For both the position information in the area and the position information in the jurisdiction area of the upper server 20 other than the upper server 20 of the lower server 40 itself, the lower server 40 itself (for example, the lower server 40A) using the tag identification information β. The mobile body location information database 50 (see FIGS. 5 and 12) is searched to obtain the location information (name and IP address of the host server 20) of the relevant mobile body, and the obtained location information of the mobile body is A process of transmitting to the user terminal device 80 via the network 2 is executed. This process corresponds to steps S13 and S14 in FIG. It should be noted that the position information in any jurisdiction area is included in the moving body position information database 50 (see FIGS. 5 and 12) of the lower server 40 itself (for example, the lower server 40A) as long as the position information is at the upper server level. Is also stored, so there is no need to perform query processing to other servers.

  When the browsing processing means 49 accepts selection information without accuracy specification, the mobile server position information database 50 (FIG. 5, FIG. 5) of the lower server 40 itself (for example, the lower server 40A) using the tag identification information β. (See FIG. 12) to obtain the position information and the like of the corresponding moving body as it is (the stored data is obtained as it is regardless of the position accuracy), and the position information of the obtained moving body Is transmitted to the user terminal device 80 via the network 2. This process corresponds to steps S11 and S12 in FIG. Therefore, for the position information in the jurisdiction area of the lower server 40 itself to which the mobile object to be browsed depends, the position information of the mobile object (name and IP address of the upper server 20 where the mobile object stays, the mobile object stays) The name and IP address of the subordinate server 40, and the name and installation position name of the connected wireless IC tag reader 60) and the connection start time and connection time to the wireless IC tag reader 60 are stored in the user terminal device 80. Is displayed. In addition, regarding the position information in the jurisdiction area of the other lower server 40 under the upper server 20 of the lower server 40 itself to which the mobile object to be browsed depends, the position information of the moving object (the upper server 20 where the moving object stays). The name and IP address, and the name and IP address of the subordinate server 40 in which the mobile body stays) and the entry time and stay time of the destination subordinate server 40 in the jurisdiction area of the user terminal device 80 Is displayed. Furthermore, for the position information in the jurisdiction area of the upper server 20 other than the upper server 20 of the lower server 40 itself to which the mobile object to be browsed depends, the position information of the moving object (the name of the upper server 20 where the moving object stays). And the IP address) and the entry time and stay time of the destination higher-level server 20 in the jurisdiction area are displayed on the user terminal device 80.

  Further, the browsing processing means 49 receives an inquiry signal from the upper server 20 (for example, the upper server 20B) of the lower server 40 itself (for example, the lower server 40C or the lower server 40D) together with information indicating the tag reader level accuracy designation. In this case, the tag identification information β is used to search the moving body location information database 50 (see FIGS. 5 and 12) of the lower server 40 itself (for example, the lower server 40C or the lower server 40D) and search for the corresponding moving body. Acquire and acquire position information (name and IP address of the upper server 20, name and IP address of the lower server 40, and name and installation position information of the wireless IC tag reader 60), connection start time and connection time. The location information of the mobile object Server 20 (e.g., host server 20B) executes the processing of transmitting to. This process corresponds to steps S23 to S26 in FIG.

  Further, the browsing processing means 49 indicates the accuracy specification of the tag reader level with the inquiry signal from the other lower server 40 (for example, the lower server 40A) under the upper server 20 of the lower server 40 itself (for example, the lower server 40B). When the information is received together with the information, the mobile server location information database 50 (see FIGS. 5 and 12) of the subordinate server 40 itself (for example, the subordinate server 40B) is searched using the tag identification information β and the corresponding mobile unit is searched. Acquire and acquire position information (name and IP address of the upper server 20, name and IP address of the lower server 40, and name and installation position information of the wireless IC tag reader 60), connection start time and connection time. The position information and the like of the mobile object that has been transmitted are transmitted to the other lower server 40 (for example, the inquiry source) via the network 2. , To perform the processing to be returned to the lower server 40A). This process corresponds to steps S20 and S21 in FIG.

  As shown in FIG. 5, the mobile body location information database 50 is a mobile body subordinate to the subordinate server 40 that has entered the jurisdiction of the subordinate server 40 itself, and other subordinates that have entered the jurisdiction of the subordinate server 40 itself. For a mobile body subordinate to the server 40 and a mobile body subordinate to the subordinate server 40 itself that has entered the jurisdiction area of another subordinate server 40, tag identification information β (see FIG. 9) and position information ( The name and IP address of the upper server 20 where the mobile body stays, the name and IP address of the lower server 40 where the mobile body stays, and the name and installation position name of the connected wireless IC tag reader 60) and wireless Connection start time and connection time to the IC tag reader 60, or when the upper server 20 or the lower server 40 enters the jurisdiction area And the residence time, and stores in association.

  More specifically, the mobile object position information database 50 includes the tag identification information β (when the mobile object moves to the jurisdiction area of the subordinate server 40 to which the mobile object depends and when it moves within this jurisdiction area. 9) and the position information of the mobile body (name and IP address of the upper server 20 where the mobile body stays, name and IP address of the lower server 40 where the mobile body stays, and the connected wireless IC tag reader 60 and the name of the installation position) and the connection start time and connection time to the wireless IC tag reader 60 are stored. In addition, the mobile object position information database 50 is configured such that when the mobile object moves to the jurisdiction area of another lower server 40 below the upper server 20 of the lower server 40 to which the mobile object depends, the tag identification information β (see FIG. 9), the location information of the mobile body (name and IP address of the upper server 20 where the mobile body stays, and name and IP address of the lower server 40 where the mobile body stays), and the lower server of the destination The entry time and stay time for 40 jurisdictions are stored. Furthermore, the mobile body position information database 50 includes tag identification information β (see FIG. 9) and a mobile body when the mobile body has moved to a jurisdiction area of an upper server 20 other than the upper server 20 to which the mobile body is subordinate. Position information (name and IP address of the upper server 20 where the mobile body stays) and the entry time and stay time of the destination upper server 20 in the jurisdiction area are stored.

  As shown in FIG. 6, the tag reader information table storage unit 51 includes a tag reader identifier α for identifying the wireless IC tag reader 60 and a wireless IC tag reader 60 for each wireless IC tag reader 60 installed in the jurisdiction area of the lower server 40 itself. The tag reader information table that defines the correspondence between the name and the installation position name is stored. The name of the wireless IC tag reader 60 may be a unique name under the upper server 20 of the lower server 40, but may be a unique name for the entire mobile body position tracking system 10.

  As shown in FIG. 7, the server information table storage means 52 includes an identifier, name, and IP address for the lower server 40 itself, an identifier, name, and IP address for the upper server 20 of the lower server 40 itself, The server 40 stores a server information table including identifiers, names, and IP addresses of other lower servers 40 under the upper server 20 of the server 40 itself.

  <Configuration of Wireless IC Tag Reader 60>

  In FIG. 2, each wireless IC tag reader 60 (60A to 60H) is arranged in, for example, indoors and corridors such as buildings in a management facility or university campus, a road shoulder, a power pole, and the like. Tag identification information reception processing means 61 for executing processing for receiving tag identification information β (see FIG. 9) transmitted from the IC tag 70 by wireless communication, and tag identification information received by the tag identification information reception processing means 61 Connection information transmission processing means for executing processing for transmitting β (see FIG. 9) and tag reader identifier α (see FIG. 8) to the lower server 40 having jurisdiction over the network 2 (any one of the lower LANs 7A to 7D). 62, tag reader information (a tag reader identifier α for identifying the wireless IC tag reader 60 functioning as position identification information, and its wireless IC tag reader Tag reader information storage unit 63 for storing the IP address) of the subordinate server 40 that has jurisdiction over the da 60 itself (which is constituted by a see Figure 8).

  The connection information transmission processing means 62, for example, at a predetermined time interval such as every second, the tag reader identifier α stored in the tag reader information storage means 63 (see FIG. 8) and the tag identification information β received from the wireless IC tag 70 (see FIG. 9). ) Is transmitted to the lower server 40 in which the IP address is stored in the tag reader information storage means 63 (see FIG. 8). The transmission to the lower server 40 may be performed only when the wireless IC tag 70 is connected. When the wireless IC tag 70 is not connected, data indicating a non-connection state is transmitted and always transmitted. You may do it. Further, it may be transmitted in response to a transmission request from the lower server 40.

  <Configuration of wireless IC tag 70>

  In FIG. 2, a wireless IC tag 70 is attached to a moving body, and when approaching the wireless IC tag reader 60, tag identification information β (see FIG. 9) is transmitted to the wireless IC tag reader 60 by wireless communication. A tag identification information transmission processing unit 71 that executes a transmission process and a tag identification information storage unit 72 that stores the tag identification information β are configured.

  As shown in FIG. 9, the tag identification information β includes an identifier β1 of one specific upper server 20 to which the mobile body to which the wireless IC tag 70 is attached depends and an identification β1 to which the mobile body under the upper server 20 is subordinate. Of the subordinate server 40 and a tag identifier β3 for identifying the wireless IC tag 70. The wireless IC tag 70 does not have its own power supply, receives a transmission from the wireless IC tag reader 60, and returns tag identification information β to the wireless IC tag reader 60 with its energy. It may have a power supply and transmit the tag identification information β to the wireless IC tag reader 60 by itself.

<Configuration of user terminal device 80>
The user terminal device 80 is a terminal device operated by a user of position information, and is configured by a computer. For example, an input unit such as a mouse or a keyboard, a display unit such as a liquid crystal display or a CRT display, and a printing unit It has. The user terminal device 80 is loaded with a browsing program (such as a Web browser).

  In the above, the processing means 22 to 27 included in the processing means 21 of the higher order server 20 and the processing means 42 to 49 included in the processing means 41 of the lower order server 40 are respectively included in the upper order server 20 and the lower order server 40. It is realized by a central processing unit (CPU) provided inside the computer main body and one or a plurality of programs that define the operation procedure of the CPU.

  Further, as the moving body position information database 30 and server information table storage means 31 of the upper server 20, and the moving body position information database 50, tag reader information table storage means 51, and server information table storage means 52 of the lower server 40, For example, a hard disk, ROM, EEPROM, flash memory, RAM, MO, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, FD, magnetic tape, or a combination thereof may be adopted. Can do.

  Furthermore, the upper server 20 and the lower server 40 are not limited to those realized by one computer or one CPU, but are realized by performing distributed processing with a plurality of computers or CPUs. Also good.

  In the present embodiment as described above, the mobile body position tracking system 10 implements management processing and browsing / retrieval processing of mobile body position information as follows.

  As shown in FIG. 10, a case will be described in which the moving body 1 to which the wireless IC tag 70 is attached moves within the jurisdiction area of the upper server 20A at the university A and within the jurisdiction area of the upper server 20B at the university B. It is assumed that the mobile 1 is subordinate to the upper server 20A of University A and the lower server 40A of the X department of University A.

  In FIG. 11, first, the mobile body 1 moves into the jurisdiction area of the subordinate server 40A to which the mobile body 1 is subordinate, and the wireless IC tag 70 attached to the mobile body 1 is installed in the jurisdiction area of the subordinate server 40A. It is assumed that the wireless IC tag reader 60A is connected. At this time, tag identification information β (see FIG. 9) is wirelessly transmitted from the wireless IC tag 70 to the wireless IC tag reader 60A, and the tag reader identifier α (see FIG. 8) and tag identification are transmitted from the wireless IC tag reader 60A to the lower server 40A. Information β is transmitted via the network 2 (lower LAN 7A). In the lower server 40A, the connection monitoring processing means 42 receives the tag reader identifier α and the tag identification information β transmitted from the wireless IC tag reader 60A.

  Subsequently, in the subordinate server 40A, the tag position information stored in the tag reader information table storage unit 51 (see FIG. 6) is obtained from the tag reader identifier α received from the connection monitoring processing unit 42 by the moving body position information registration processing unit 43. Using the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40A, the name and the installation position name of the wireless IC tag reader 60A to which the connection has been made are acquired. The name and IP address for the upper server 20A of the lower server 40A, and the name and IP address for the lower server 40A are acquired, and the acquired location information of the mobile body (name and IP address for the upper server 20A, for the lower server 40A) Name and IP address, average The name of the wireless IC tag reader 60A and the installation position name) and the connection start time with the wireless IC tag reader 60A are associated with the tag identification information β received from the connection monitoring processing means 42, and the moving body position information database of the lower server 40A. 50 (see FIGS. 5 and 12) (step S1).

  Thereafter, as shown in FIG. 10, the mobile body 1 moves within the jurisdiction of the subordinate server 40A to which the mobile body 1 is subordinate, and the wireless IC tag 70 attached to the mobile body 1 is in the jurisdiction area of the subordinate server 40A. Suppose that it is connected to another wireless IC tag reader 60B installed inside. At this time, as in the case of connection with the wireless IC tag reader 60A described above, the lower server 40A receives the tag reader identifier α and the tag identification information β transmitted from the wireless IC tag reader 60B by the connection monitoring processing means 42. .

  Subsequently, in the lower server 40A, in the same manner as in the case of connection with the wireless IC tag reader 60A described above, the mobile body position information registration processing unit 43 sets the name and the installation position name of the wireless IC tag reader 60B to which connection has been made. The acquired position information (name and IP address of the upper server 20A, name and IP address of the lower server 40A, and name and installation position name of the wireless IC tag reader 60B) and the wireless IC tag reader 60B Is stored in the moving body position information database 50 (see FIGS. 5 and 12) of the lower server 40A in association with the tag identification information β (step S2 in FIG. 11).

  Further, the connection time measurement processing means 45 receives information indicating the presence or absence of connection from the connection monitoring processing means 42, and measures the connection time with each of the wireless IC tag readers 60A and 60B installed in the jurisdiction area of the lower server 40A. When the mobile unit 1 exits from the respective cover ranges of the wireless IC tag readers 60A and 60B, the measured connection time is represented by tag identification information β, mobile unit location information (name and IP address of the host server 20A). , The name and IP address of the subordinate server 40A, and the name and installation position name of the wireless IC tag readers 60A and 60B) and the connection start time of the wireless IC tag readers 60A and 60B. It is stored in the position information database 50 (see FIG. 5).

  Thereafter, as shown in FIG. 10, the mobile body 1 moves to the jurisdiction area of the lower server 40B, and the wireless IC tag 70 attached to the mobile body 1 is installed in the jurisdiction area of the lower server 40B. Assume that 60D is connected. At this time as well, as in the case where the wireless IC tag readers 60A and 60B are connected to each other, in the lower server 40B, the connection monitoring processing means 42 uses the tag reader identifier α and the tag identification information β transmitted from the wireless IC tag reader 60D. Receive.

  Subsequently, in the lower server 40B, as in the case where the wireless IC tag readers 60A and 60B are connected, the name and the installation position of the wireless IC tag reader 60D connected by the mobile body position information registration processing unit 43. The name is acquired, and the position information (the name and IP address of the upper server 20A, the name and IP address of the lower server 40B, and the name and installation position name of the wireless IC tag reader 60D) of the moving body and the wireless IC tag reader The connection start time with 60D is stored in the moving body position information database 50 (see FIGS. 5 and 12) of the lower server 40B in association with the tag identification information β (step S3 in FIG. 11).

  Then, in the lower server 40B, the mobile body position information transfer processing unit 44 uses the identifier β1 of the upper server 20A subordinate to the mobile body 1 included in the tag identification information β (see FIG. 9) received by the connection monitoring processing unit 42, and Using the identifier β2 of the lower server 40A and the identifiers of the servers in the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40B, a comparison process is performed to control the lower server 40B. Whether the mobile 1 that entered the area is subordinate to the subordinate server 40B itself, subordinate to another subordinate server 40A under the subordinate server 40A of the subordinate server 40B itself, or other than the superordinate server 20A of the subordinate server 40B itself It is determined whether it is subordinate to any one of the upper servers 20. Here, it is determined that the mobile unit 1 is subordinate to another lower server 40A below the upper server 20A of the lower server 40B itself. Such determination processing is performed after the registration processing of the position information in steps S1 and S2 described above, but as a result of determination that the mobile body 1 is subordinate to itself, no transfer processing is performed. .

  If the mobile body position information transfer processing unit 44 determines that the mobile body 1 is subordinate to another lower server 40A under the upper server 20A of the lower server 40B itself, the tag identification information β, the position of the mobile body Information about the name and IP address of the lower server 40B itself as information and the entry time (connection start time with the wireless IC tag reader 60D) of the lower server 40B itself to the lower server 40A to which the mobile unit 1 is subordinate 2 (upper LAN 5A and lower LANs 7A and 7B) are directly transferred (step S4).

  In the lower server 40B, the lower server stay time measurement processing means 46 measures the stay time of the lower server 40B itself in the jurisdiction area for the mobile body 1, and the mobile body 1 exits from the jurisdiction area of the lower server 40B itself. In this case, the measured staying time is directly transmitted to the lower server 40A to which the mobile body 1 is subordinate via the network 2 (the upper LAN 5A and the lower LANs 7A and 7B).

  Subsequently, in the subordinate server 40A to which the mobile unit 1 is subordinate, the tag identification information β directly transferred from the destination subordinate server 40B and the destination subordinate server 40B by the mobile unit location information registration processing unit 43 Receiving the name and IP address and the entry time of the destination lower server 40B to the jurisdiction area, the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40A is used to move The name and IP address of the upper server 20A of the previous lower server 40B, that is, the upper server 20A of the lower server 40A itself are acquired, and the location information of the mobile body (name and IP address of the upper server 20A and lower server 40B). Name and IP address) and advance to the jurisdiction area of the subordinate server 40B Time, in correspondence with the received tag identification information beta, child servers 40A mobile location information database 50 (FIG. 5, see FIG. 12) is stored (step S4 in FIG. 11).

  In the subordinate server 40A to which the mobile unit 1 is subordinate, the subordinate server stay time registration processing means 47 receives the stay time in the jurisdiction area of the subordinate server 40B transferred from the subordinate server 40B, and the received stay time is , Tag identification information β, position information of the moving body (name and IP address of the upper server 20A, and name and IP address of the lower server 40B), and the entry time of the lower server 40B into the jurisdiction area The mobile server position information database 50 (see FIGS. 5 and 12) of the lower server 40A itself is stored.

  Thereafter, as shown in FIG. 10, the mobile body 1 moves to the jurisdiction area of the lower server 40C below the upper server 20B, and the wireless IC tag 70 attached to the mobile body 1 enters the jurisdiction area of the lower server 40C. It is assumed that the wireless IC tag reader 60F is connected. At this time, as in the case of connection with the above-described wireless IC tag readers 60A, 60B, 60D, in the lower server 40C, the tag reader identifier α and the tag identification information transmitted from the wireless IC tag reader 60F by the connection monitoring processing means 42. β is received.

  Subsequently, in the lower server 40C, in the same way as when the wireless IC tag readers 60A, 60B, 60D are connected, the name and the name of the wireless IC tag reader 60F connected by the mobile body position information registration processing unit 43 are described. While acquiring the installation location name, the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40C is used to obtain the name and IP address of the upper server 20B of the lower server 40C, and the lower server. The name and IP address of the server 40C are acquired, and the acquired location information of the moving body (name and IP address of the upper server 20B, name and IP address of the lower server 40C, and name and installation of the wireless IC tag reader 60F) Location name) and wireless The connection start time of the C tag reader 60F, in correspondence with the tag identification information beta, mobile location information database 50 (see FIGS. 5 and 12) of the child server 40C is stored (step S5 in FIG. 11).

  Then, in the lower server 40C, the mobile unit position information transfer processing unit 44 uses the identifier β1 of the upper server 20A subordinate to the mobile unit 1 included in the tag identification information β (see FIG. 9) received by the connection monitoring processing unit 42, and Comparison processing is performed using the identifier β2 of the lower server 40A and the identifiers of the servers in the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40C, and the jurisdiction of the lower server 40C. The mobile body 1 that has entered the area is subordinate to the subordinate server 40C itself, subordinate to another subordinate server 40D under the subordinate server 20B of the subordinate server 40C itself, or other than the superordinate server 20B of the subordinate server 40C itself It is determined whether it is subordinate to any one of the upper servers 20. Here, it is determined that the mobile unit 1 is subordinate to any one of the upper servers 20 other than the upper server 20B of the lower server 40C itself. Although it can be determined from the tag position information β that the mobile unit 1 is subordinate to any one of the upper servers 20 other than the upper server 20B, the name or IP address of the upper server 20 to which the mobile unit 1 is subordinate is determined. Since it cannot be specified, transfer processing to the upper server 20B of the lower server 40C itself is performed as follows.

  When the mobile body position information transfer processing unit 44 determines that the mobile body 1 is subordinate to any one of the upper servers 20 other than the upper server 20B of the lower server 40C itself, the tag identification information β, the position of the mobile body The name and IP address of the lower server 40C itself as information and the entry time (connection start time with the wireless IC tag reader 60F) of the lower server 40C itself to the upper server 20B of the lower server 40C itself are transferred to the network 2 The data is transferred via (upper LAN 5B and lower LAN 7C) (step S6 in FIG. 11).

  Subsequently, in the upper server 20B, the tag position information β transferred from the lower server 40C of the upper server 20B itself by the moving body position information registration processing unit 22, the name of the lower server 40C as the position information of the moving body, and The server information received in the server information table storage means 31 (see FIG. 4) of the upper server 20B, receiving the IP address and the entry time (connection start time with the wireless IC tag reader 60F) of the lower server 40C into the jurisdiction area Using the table, the name and IP address for the upper server 20B itself are acquired, and the location information of the mobile body (name and IP address for the upper server 20B, and name and IP address for the lower server 40C) and the lower server 40C. Is the tag identification information β Corresponding to (see FIG. 9), it is stored in the moving body location information database 30 (see FIGS. 3 and 12) of the higher order server 20B (step S6 in FIG. 11).

  Further, in the upper server 20B, the tag identification information β transferred from the lower server 40C of the upper server 20B itself by the moving body position information transfer processing means 23, the name and IP of the lower server 40C as the position information of the moving body When the address and the time of entry of the lower server 40C into the jurisdiction area are received, data such as the position information of the moving object regarding the received tag identification information β is the moving object position information database 30 (FIG. 3) of the upper server 20B. (If the data about the tag identification information β is received for the first time), or the data about the tag identification information β is already stored, but it is the latest of the stored data Predetermined time from the exit time (time obtained by adding the stay time to the entry time) for the data of If it has passed (that is, if it has entered the jurisdiction area of the upper server 20B before, but has already left, it can be regarded as a new entry into the jurisdiction area of the upper server 20B) Using the server information table stored in the server information table storage means 31 (see FIG. 4) of the upper server 20B, the name and IP address of the upper server 20B itself are acquired, and from the received tag identification information β, Using the server information table (see FIG. 4), the IP address (that is, the destination address) of the upper server 20A to which the mobile body 1 is subordinate is acquired, and the upper server 20B as the tag identification information β and the mobile body position information is obtained. The name and IP address of itself, and the time of entry into the jurisdiction area of the upper server 20B (the upper server 20B The lower subordinate server 40C enters the jurisdiction area) is transferred via the network 2 (Internet 3) to the upper subordinate server 20A on which the mobile unit 1 is subordinate (step S7 in FIG. 11).

  Then, in the upper server 20A, the tag position information β transferred from the other upper server 20B by the moving body position information transfer processing unit 23, the name and IP address of the upper server 20B as the moving body position information, and The time at which the upper server 20B enters the jurisdiction area is received, and from the received tag identification information β, the IP address (ie, transmission) of the lower server 40A to which the mobile unit 1 is subordinate using the server information table (see FIG. 4). Destination address), the tag identification information β, the name and IP address of the upper server 20B as the position information of the mobile object, and the entry time of the upper server 20B into the jurisdiction area are moved under the upper server 20A itself. Via network 2 (upper LAN 5A and lower LAN 7A) to lower server 40A to which body 1 is subordinate Transferring Te (step S8 in FIG. 11).

  Subsequently, in the subordinate server 40A to which the mobile unit 1 is subordinate, the mobile unit location information registration processing means 43 transfers the data from the subordinate server 40C to the destination via the high order server 20B of the destination and the high order server 20A of the subordinate server 40A itself. To the location information that has been transmitted, that is, the tag identification information β transferred from the upper server 20A of the lower server 40A itself, the name and IP address of the destination upper server 20B, and the jurisdiction area of the destination upper server 20B The moving body position information database 50 of the lower server 40A is associated with the position information (name and IP address of the upper server 20B) and the moving time of the moving body corresponding to the received tag identification information β. 5 (see FIG. 5 and FIG. 12) (step S8 in FIG. 11).

  In the lower server 40C, the lower server stay time measurement processing means 46 measures the stay time of the mobile server 1 in the jurisdiction area of the lower server 40C itself, and the mobile body 1 leaves the jurisdiction area of the lower server 40C itself. In this case, the measured stay time is transmitted to the upper server 20B of the lower server 40C itself via the network 2 (upper LAN 5B and lower LAN 7C) together with the tag identification information β.

  Subsequently, in the upper server 20B, the lower server stay time registration processing means 26 receives the stay time in the jurisdiction area of the lower server 40C and the tag identification information β transmitted from the lower server 40C under the upper server 20B itself. Then, the received stay time is transferred to the tag identification information β, the position information of the moving body (name and IP address of the upper server 20B, and name and IP address of the lower server 40C), and the jurisdiction area of the lower server 40C. In association with the entry time of the host server 20B, the higher-level server 20B stores the mobile body location information database 30 (see FIGS. 3 and 12).

  Thereafter, as shown in FIG. 10, the mobile body 1 moves to the jurisdiction area of the lower server 40D below the upper server 20B, and the wireless IC tag 70 attached to the mobile body 1 enters the jurisdiction area of the lower server 40D. It is assumed that the wireless IC tag reader 60H is connected. At this time, as in the case of connection with the above-described wireless IC tag readers 60A, 60B, 60D, 60F, in the lower server 40D, the tag reader identifier α and the tag transmitted from the wireless IC tag reader 60H by the connection monitoring processing means 42 are connected. The identification information β is received.

  Subsequently, in the lower server 40D, similarly to the case where the wireless IC tag readers 60A, 60B, 60D, 60F are connected, the mobile body position information registration processing unit 43 uses the wireless IC tag reader 60H connected. While acquiring a name and an installation position name, using the server information table memorize | stored in the server information table memory | storage means 52 (refer FIG. 7) of low-order server 40D, the name and IP address about high-order server 20B of low-order server 40D, In addition, the name and IP address of the lower server 40D are acquired, and the location information of the acquired mobile body (name and IP address of the upper server 20B, name and IP address of the lower server 40D, and name of the wireless IC tag reader 60H) And installation position name) The connection start time of the fine wireless IC tag reader 60H, in correspondence with the tag identification information beta, mobile location information database 50 (see FIGS. 5 and 12) of the child server 40D is stored (step S9 in FIG. 11).

  Then, in the lower server 40D, the mobile unit position information transfer processing unit 44 uses the identifier β1 of the upper server 20A subordinate to the mobile unit 1 included in the tag identification information β (see FIG. 9) received by the connection monitoring processing unit 42. Comparison processing is performed using the identifier β2 of the lower server 40A and the identifiers of the servers in the server information table stored in the server information table storage means 52 (see FIG. 7) of the lower server 40D. The mobile body 1 that has entered the area is subordinate to the subordinate server 40D itself, subordinate to another subordinate server 40C under the subordinate server 40B of the subordinate server 40D itself, or other than the superordinate server 20B of the subordinate server 40D itself It is determined whether it is subordinate to any one of the upper servers 20. Here, it is determined that the mobile unit 1 is subordinate to any one of the upper servers 20 other than the upper server 20B of the lower server 40D itself. Although it can be determined from the tag position information β that the mobile unit 1 is subordinate to any one of the upper servers 20 other than the upper server 20B, the name or IP address of the upper server 20 to which the mobile unit 1 is subordinate is determined. Since it cannot be specified, the transfer process to the upper server 20B of the lower server 40D itself is performed as follows.

  If the mobile body position information transfer processing unit 44 determines that the mobile body 1 is subordinate to any upper server 20 other than the upper server 20B of the lower server 40D itself, the tag identification information β, the position of the mobile body The name and IP address of the lower server 40D itself as information and the entry time (connection start time with the wireless IC tag reader 60H) of the lower server 40D itself to the upper server 20B of the lower server 40D itself are transferred to the network 2 The data is transferred via (upper LAN 5B and lower LAN 7D) (step S10 in FIG. 11).

  Subsequently, in the upper server 20B, the tag position information β transferred from the lower server 40D of the upper server 20B itself by the moving body position information registration processing unit 22, the name of the lower server 40D as the position information of the moving body, and Server information received in the server information table storage means 31 (refer to FIG. 4) of the upper server 20B, received the IP address and the entry time (connection start time with the wireless IC tag reader 60H) of the lower server 40D into the jurisdiction area Using the table, the name and IP address for the upper server 20B itself are acquired, and the location information of the mobile body (name and IP address for the upper server 20B, and name and IP address for the lower server 40D) and the lower server 40D. Is the tag identification information β Corresponding to (see FIG. 9), it is stored in the moving body location information database 30 (see FIGS. 3 and 12) of the higher order server 20B (step S10 in FIG. 11).

  In the upper server 20B, the tag identification information β transferred from the lower server 40D of the upper server 20B itself, the name and IP address of the lower server 40D as the position information of the moving body, and the jurisdiction area of the lower server 40D When the entry time is received, the mobile body location information transfer processing means 23 refers to the mobile body location information database 30 (see FIGS. 3 and 12) of the upper server 20B, and the received data is the mobile body (reception). Or the mobile body equipped with the wireless IC tag 70 having the tag identification information β) is data when it first enters the jurisdiction area of the upper server 20B, or when it re-enters after exiting from the jurisdiction area of the upper server 20B. Data (i.e., I have stayed in the jurisdiction of the host server 20B before, In the jurisdiction area of the higher order server 20B), or in the jurisdiction area of the higher order server 20B, the other lower server 40 (here, the lower order server 40C). It is determined whether the data is only when the movement from the jurisdiction area to the jurisdiction area of the lower server 40D is performed. The received data is moved from the jurisdiction area of the other lower server 40 (here, the lower server 40C) to the jurisdiction area of the lower server 40D in the jurisdiction area of the upper server 20B. If the data is only data, the data such as the position information is not transmitted to the higher order server 20A to which the mobile body 1 is subordinate. On the other hand, when the received data is data when the mobile body first enters the jurisdiction area of the upper server 20B, or when the mobile body reenters after retreating from the jurisdiction area of the upper server 20B. Then, data such as position information is transmitted to the higher order server 20A to which the mobile unit 1 is subordinate. Specifically, data such as the position information of the moving body regarding the tag identification information β is already stored in the moving body position information database 30 of the host server 20B by the moving body position information transfer processing unit 23 except for the received data. If it is already stored, the exit time from the jurisdiction of the subordinate server 40 related to the latest data among the stored data (adding the stay time to the entry time) It is determined whether or not a predetermined time has elapsed from the (obtained time). If the predetermined time has not elapsed, the mobile body leaves the jurisdiction area of the subordinate server 40 related to the latest data, Since it has entered the jurisdiction area of the subordinate server 40D within the determined time interval, the received data is sent to other subordinate servers 40 (in this jurisdiction area of the superordinate server 20B). In this case, it is possible to determine that the data is only obtained by moving from the jurisdiction area of the subordinate server 40C to the jurisdiction area of the subordinate server 40D. Data such as position information is not transmitted. In the example of movement shown in FIG. 10, the mobile 1 moves directly from the jurisdiction area of the lower server 40C to the jurisdiction area of the lower server 40D without leaving the upper server 20B. When the server 40D enters the jurisdiction area, data such as position information is not transmitted to the host server 20A to which the moving body 1 is subordinate. On the other hand, if the data such as the position information of the moving body regarding the tag identification information β is not stored in the moving body position information database 30 of the upper server 20B except for the received data, the received data Since it can be determined that the data is the data when the body first enters the jurisdiction area of the host server 20B, the data such as the position information is transmitted to the host server 20A to which the mobile body 1 is subordinate (step of FIG. 11). (See S7). In addition to the received data, data such as the position information of the moving body regarding the tag identification information β is already stored in the moving body position information database 30 of the higher-level server 20B. If a predetermined time has elapsed from the exit time (the time obtained by adding the stay time to the entry time) from the jurisdiction of the subordinate server 40 related to the latest data, the received data is moved Since it can be determined that the data is data when the body once retreats from the jurisdiction area of the upper server 20B, data such as position information is transmitted to the upper server 20A to which the mobile body 1 is subordinate ( (See step S7 in FIG. 11).

  In the upper server 20B, the upper server stay time measurement processing unit 24 measures the stay time of the mobile server 1 in the jurisdiction area of the upper server 20B itself, and thereafter, the mobile body 1 controls the upper server 20B itself. When the user leaves the area, the measured staying time is transmitted together with the tag identification information β to the upper server 20A on which the moving body 1 is subordinate via the network 2 (Internet 3).

  Subsequently, in the upper server 20A to which the mobile unit 1 is subordinate, the upper server stay time transfer processing means 25 receives the stay time and tag identification information β transmitted from the upper server 20B, and the received stay time and tag identification. The information β is transferred via the network 2 (upper LAN 5A and lower LAN 7A) to the lower server 40A to which the mobile unit 1 under the upper server 20A itself is subordinate.

  Then, in the lower server 40A to which the mobile body 1 is subordinate, the upper server stay time registration processing means 48 transmits the stay time in the jurisdiction area of the upper server 20B of the transfer destination transferred from the upper server 20A of the lower server 40A itself and The tag identification information β is received, and the received stay time is transferred to the jurisdiction area of the tag identification information β, the name and IP address of the destination upper server 20B as the position information of the moving object, and the destination upper server 20B. Is stored in the moving body position information database 50 (see FIGS. 5 and 12) of the subordinate server 40A.

  In FIG. 13, a user who wants to browse the position information of a moving body operates the user terminal device 80, and the current position information and / or movement history of the moving body with respect to the lower server 40 to which the moving body to be browsed depends. A position information search request signal for information is transmitted via the network 2 (step S11). At this time, the user can select from the mobile terminal identification information such as the name of the mobile object and the student ID number, and four types of position information with or without accuracy specification of the three types of position information. Enter information and search period. Then, the mobile object identification information, the selection information related to the accuracy designation, and the search period are transmitted from the user terminal device 80 to the subordinate server 40 to which the mobile object is subordinate via the network 2 together with the search request signal. Here, it is assumed that the user accesses the subordinate server 40A to which the mobile body 1 is subordinate in order to search the position information of the mobile body 1.

  Subsequently, in the subordinate server 40A to which the mobile body 1 is subordinate, the browsing processing means 49 receives the mobile body identification information from the user terminal device 80, the selection information regarding the accuracy designation, and the search period, and stores a conversion table (not shown). Using the conversion table stored in the means, the received mobile identification information is converted into tag identification information β, and the following search processing is performed using the obtained tag identification information β. The user may input the tag identification information β as the moving body identification information.

  First, in the lower server 40A, when selection information without accuracy designation is received by the browsing processing means 49 (step S11), the mobile unit position information database 50 (FIG. 5) of the lower server 40A is used using the tag identification information β. 5 (see FIG. 12), the data such as the position information of the corresponding moving body is obtained as it is (the stored data is obtained as it is regardless of the accuracy of the position), and the obtained moving body Is transmitted to the user terminal device 80 via the network 2 (step S12).

  Then, on the screen of the user terminal device 80, the position information in the jurisdiction area of the subordinate server 40A itself on which the mobile object 1 to be browsed depends on the position information of the mobile object 1 (the upper part where the mobile object 1 stays). The name and IP address of the server 20A, the name and IP address of the subordinate server 40A where the mobile unit 1 stays, and the name and installation position name of the connected wireless IC tag reader 60), and the wireless IC tag reader 60 The connection start time and the connection time are displayed (see FIG. 12). In addition, regarding the position information in the jurisdiction area of the other lower server 40B under the upper server 20A of the lower server 40A itself to which the mobile object 1 to be browsed depends, the position information of the mobile object 1 (the mobile object 1 stays). The name and IP address of the upper server 20A, and the name and IP address of the lower server 40B where the mobile unit 1 stays), and the entry time and stay time of the destination lower server 40B in the jurisdiction area are displayed. (See FIG. 12). Further, regarding the position information in the jurisdiction of the upper server 20B other than the upper server 20A of the lower server 40A itself to which the mobile object 1 to be browsed depends, the position information of the mobile object 1 (the upper server 20B where the mobile object stays). And the entry time and stay time in the jurisdiction area of the destination upper server 20B (see FIG. 12).

  Further, in the lower server 40A, when the upper server level accuracy designation is received by the browsing processing means 49 (step S13), the position information within the jurisdiction of the lower server 40A itself, the upper server 20A of the lower server 40A itself. The tag identification information β is used for both the position information in the jurisdiction area of the other lower server 40B below and the position information in the jurisdiction area of the upper server 20B other than the upper server 20A of the lower server 40A itself, By searching the mobile server location information database 50 (see FIGS. 5 and 12) of the lower server 40A itself, the location information (name and IP address of the upper server 20) of the corresponding mobile 1 and the connection start time and The connection time or the entry time and the stay time are acquired, and the acquired location information of the mobile unit 1 is Via the click 2 transmits to the user terminal device 80 (step S14). Note that the position information in any jurisdiction area is stored in the mobile server position information database 50 (see FIGS. 5 and 12) of the lower server 40A itself as long as the position information is at the upper server level. There is no need to query other servers.

  Next, in the lower server 40A, when the browsing processing means 49 receives the lower server level accuracy designation (step S15), the position information in the jurisdiction area of the lower server 40A itself and the upper server of the lower server 40A itself. For the position information in the jurisdiction area of the other lower server 40B below 20A, the mobile server position information database 50 (see FIGS. 5 and 12) of the lower server 40A itself is searched using the tag identification information β. To obtain the position information (name and IP address of the upper server 20 and name and IP address of the lower server 40), connection start time and connection time, or entry time and stay time of the corresponding mobile 1 To do. In the mobile server location information database 50 (see FIGS. 5 and 12) of the lower server 40A, other lower servers under the upper server 20A of the lower server 40A itself are up to the lower server level position information. Since the position information in the jurisdiction area of 40B is also stored, it is not necessary to perform inquiry processing to the lower server 40B.

  Subsequently, in the lower server 40A, the browsing processing means 49 transmits an inquiry signal to the upper server 20B via the network 2 for the positional information in the jurisdiction area of the upper server 20B other than the upper server 20A of the lower server 40A itself. (Step S16). This inquiry signal includes tag identification information β, selection information related to accuracy specification (information indicating accuracy specification at a lower server level), and a search period.

  Then, in the upper server 20B, the browsing processing means 27 receives the inquiry signal from the lower server 40A under the other upper server 20A together with the tag identification information β, information indicating the accuracy specification of the lower server level, and the search period. In the case (step S16), the tag identification information β is used to search the mobile server location information database 30 (see FIGS. 3 and 12) of the host server 20B itself, so that the location information of the mobile 1 concerned (The name and IP address of the upper server 20 and the name and IP address of the lower server 40), the entry time and the stay time are acquired, and the acquired location information of the moving body 1 is obtained via the network 2. A reply is sent to the inquiring lower server 40A (step S17).

  Thereafter, in the lower server 40A, the browsing processing means 49 returns the location information (name and IP address of the upper server 20) of the corresponding mobile body 1 returned from the upper server 20B other than the upper server 20A of the lower server 40A itself. And the name and IP address of the subordinate server 40), the entry time and the stay time, and the received location information of the mobile unit 1, the entry time and the stay time, and the mobile unit location of the subordinate server 40A described above Location information (name and IP address of the upper server 20 and name and IP address of the lower server 40) of the moving body 1 obtained by searching the information database 50 (see FIGS. 5 and 12), and the entry time and Combined with the staying time, the user terminal device is connected via the network 2 It sends to 80 (step S18). The lower server 40A stores the position information of the moving body 1 acquired from the upper server 20B other than the upper server 20A of the lower server 40A itself in the moving body position information database 50 of the lower server 40A. It is also possible to prepare for an inquiry to 1.

  In the lower server 40A, when the tag processor level accuracy designation is received by the browsing processing means 49 (step S19), the position information in the jurisdiction area of the lower server 40A itself is used using the tag identification information β. By searching the mobile server location information database 50 (see FIG. 5 and FIG. 12) of the lower server 40A itself, the location information (name and IP address of the upper server 20, the lower server 40) of the corresponding mobile body 1 is retrieved. Name, IP address, name and installation position information about the wireless IC tag reader 60), connection start time and connection time are acquired.

  Subsequently, in the lower server 40A, the browsing processing means 49 makes an inquiry to the lower server 40B via the network 2 for location information in the jurisdiction area of the other lower server 40B under the upper server 20A of the lower server 40A itself. A signal is transmitted (step S20). This inquiry signal includes tag identification information β, selection information related to accuracy designation (information indicating tag reader level accuracy designation), and a search period.

  Then, in the lower server 40B, the browsing processing means 49 sends an inquiry signal from another lower server 40A under the upper server 20A of the lower server 40B itself, tag identification information β, information indicating the tag reader level accuracy specification, and When received together with the search period (step S20), the corresponding mobile unit is searched by searching the mobile unit location information database 50 (see FIGS. 5 and 12) of the subordinate server 40B using the tag identification information β. 1 position information (name and IP address of the upper server 20, name and IP address of the lower server 40, and name and installation position information of the wireless IC tag reader 60), connection start time and connection time are acquired. The obtained location information of the mobile unit 1 is inquired via the network 2 Reply to the rank server 40A (step S21).

  Then, in the lower server 40A, the position information (name and IP address of the upper server 20, name and IP address of the lower server 40, the position information of the corresponding mobile body 1 returned from the lower server 40B by the browsing processing means 49 is displayed. In addition, the name of the wireless IC tag reader 60 and the installation position information), the connection start time and the connection time are received. The subordinate server 40A stores the position information of the mobile unit 1 acquired from the subordinate server 40B under the subordinate server 40A of the subordinate server 40A itself in the mobile unit location information database 50 of the subordinate server 40A. It is also possible to prepare for an inquiry to the mobile unit 1.

  Subsequently, in the lower server 40A, the browsing processing means 49 transmits an inquiry signal to the upper server 20B via the network 2 for the positional information in the jurisdiction area of the upper server 20B other than the upper server 20A of the lower server 40A itself. (Step S22). This inquiry signal includes tag identification information β, selection information related to accuracy designation (information indicating tag reader level accuracy designation), and a search period.

  Then, in the upper server 20B, the browsing processing unit 27 uses the inquiry signal from the lower server 40A under the other upper server 20A as the tag identification information β, selection information regarding the accuracy specification (information indicating the accuracy specification at the tag reader level). And the search period (step S22), an inquiry signal is transmitted to the lower servers 40C and 40D under the upper server 20B itself via the network 2 (steps S23 and S25). This inquiry signal includes tag identification information β, selection information related to accuracy designation (information indicating tag reader level accuracy designation), and a search period.

  Then, in the lower servers 40C and 40D, the browsing processing means 49 sends the inquiry signal from the upper server 20B of the lower servers 40C and 40D to the tag identification information β and selection information related to the accuracy specification (information indicating the accuracy specification of the tag reader level). , And when it is received together with the search period (steps S23 and S25), the tag identification information β is used to search the mobile body location information database 50 (see FIGS. 5 and 12) of the lower servers 40C and 40D itself. The position information (name and IP address of the upper server 20, the name and IP address of the lower server 40, and the name and installation position information of the wireless IC tag reader 60) of the corresponding mobile body 1 and the connection start time And the connection time is acquired, and the acquired location information of the mobile unit 1 is A reply is sent to the inquiring host server 20B via the work 2 (steps S24 and S26).

  Subsequently, in the upper server 20B, the browsing processing unit 27 returns the location information (name and IP address of the upper server 20) of the corresponding mobile body 1 returned from the lower servers 40C and 40D under the upper server 20B itself. The name and IP address of the subordinate server 40, the name and installation position information of the wireless IC tag reader 60), the connection start time and the connection time are received, and the received position information of the moving body is received via the network 2. The response is sent back to the inquiring lower server 40A (step S27).

  Thereafter, in the lower server 40A, the browsing processing means 49 returns the location information of the mobile 1 returned from the upper server 20B other than the upper server 20A of the lower server 40A itself (name and IP address of the upper server 20, lower server). 40, the name and the IP address of 40, and the name and installation position information of the wireless IC tag reader 60), the connection start time and the connection time, and the received position information of the mobile unit 1, the connection start time and the connection time. And the position information (name and IP address of the upper server 20, the lower server 40) of the moving body 1 obtained by searching the moving body position information database 50 (see FIGS. 5 and 12) of the lower server 40 A itself. Name and IP address, and wireless IC tag reader 60 Name and installation location information), connection start time and connection time, and location information of the mobile unit 1 returned from the lower server 40B in step S21 described above (name and IP address of the upper server 20, lower server) The name and the IP address of 40, the name and installation position information of the wireless IC tag reader 60), the connection start time and the connection time are transmitted to the user terminal device 80 via the network 2 (step S28). The lower server 40A stores the position information of the moving body 1 acquired from the upper server 20B other than the upper server 20A of the lower server 40A itself in the moving body position information database 50 of the lower server 40A. It is also possible to prepare for an inquiry to 1.

  According to this embodiment, there are the following effects. That is, in the mobile body position tracking system 10, the mobile body position information database 50 (see FIGS. 5 and 12) of each subordinate server 40 is subordinate to the subordinate server 40 itself that has entered the jurisdiction area of the subordinate server 40 itself. The position information of the mobile body, the position information of the mobile body subordinate to the other lower server 40 that has entered the jurisdiction area of the lower server 40 itself, and the lower server 40 itself that has entered the jurisdiction area of the other lower server 40 The position information of the subordinate mobile body is stored, and the position information of the mobile body subordinate to the other subordinate server 40 that has entered the jurisdiction area of the other subordinate server 40 is not stored. The position information of the mobile body subordinate to the other lower server 40 that has entered can be stored in the lower server 40 other than itself. For this reason, it is possible to realize distributed management of the position information of the mobile object, reduce the management load of the position information of each lower server 40, and improve the search speed of the position information of the mobile object. .

  In addition, when the mobile body moves within the jurisdiction area of the subordinate server 40 to which the mobile body is subordinate, the subordinate server 40 to which the mobile body is subordinate is sent from the wireless IC tag reader 60 installed in its own jurisdiction area. When the position information of the moving object obtained from the data is stored in the moving object position information database 50 and the moving object moves to the jurisdiction area of the other lower server 40 below the upper server 20 to which the moving object depends. The subordinate server 40 to which the mobile object is subordinate acquires the position information of the mobile object directly from the other subordinate server 40 of the movement destination and stores it in the mobile object position information database 50, and the mobile object is subordinate to the mobile object. When moving to a jurisdiction area of any lower server 40 under the upper server 20 other than the upper server 20, the lower server 40 to which the moving body is subordinated moves from the lower server 40 of the destination to the upper destination. Server 20 and the mobile may acquire the positional information of the movable body via the host server 20 when dependent stored in mobile location information database 50. Accordingly, transmission of position information of the mobile object is directly performed between the lower server 40 to which the mobile object is subordinate and the other lower server 40 under the upper server 20 to which the mobile object is dependent. The position information of the mobile body is not directly transmitted between the subordinate server 40 to which the mobile body is subordinate and the subordinate server 40 below the upper server 20 other than the upper server 20 to which the mobile body is subordinate. The transmission is performed via the higher order server 20. For this reason, most of the transmission of the position information of the mobile body is transmitted under the same upper server 20, that is, between the upper server 20 and the lower server 40 below it and the lower server under the same upper server 20 It becomes transmission between 40, and the traffic of the positional information flowing through the whole network can be suppressed.

  Further, in the mobile body position tracking system 10, the mobile body position information database 50 (see FIGS. 5 and 12) of the subordinate server 40 to which the mobile body is subordinated has the jurisdiction of the subordinate server 40 to which the mobile body is subordinate. When moving to the area and moving within this jurisdiction area, the position of the wireless IC tag reader 60 can be stored as the position information of the moving body, and the moving body is subordinate to the moving body. When moving to the jurisdiction area of another subordinate server 40 under the upper server 20 of the server 40, the level of the moving destination subordinate server 40 can be stored as the position information of the moving object. When the body moves to the jurisdiction area of the higher-level server 20 other than the higher-level server 20 to which the moving body is subordinate, the position level of the higher-level server 20 that is the moving destination is used as position information of the moving body In can be stored. For this reason, the position information of the moving object stored in the moving object position information database 50 of the subordinate server 40 to which the moving object depends is more approximate position information (position information indicating a wide range) as the moving object moves further away. Therefore, efficient information management can be realized.

  Further, in the mobile body location information database 30 (see FIGS. 3 and 12) of the upper server 20, an external mobile body that has moved to the jurisdiction of the upper server 20 itself (a mobile body that does not depend on the upper server 20 itself). Since the position information of the mobile body subordinate to the host server 20 itself is not stored, efficient information management can be realized.

  Further, in the mobile body position tracking system 10, the mobile body position information registration processing unit 43, the connection time measurement processing unit 45, and the mobile body position information database 50 of the subordinate server 40 include the jurisdiction area of the subordinate server 40 having the same mobile body. As long as it moves within the network, the connection start time and the connection time can be managed only by the lower server 40. Therefore, in the network, the connection start time and the connection time are set outside the lower server 40. It is possible to prevent traffic from occurring.

  In the mobile body position tracking system 10, the mobile body position information registration processing means 43, the lower server stay time measurement processing means 46, the lower server stay time registration processing means 47, and the mobile body position information database 50 of the lower server 40 are: Only when the mobile body enters the jurisdiction area of another subordinate server 40 below the superordinate server 20 of the subordinate server 40 to which the mobile body is subordinate and exits from this jurisdiction area, the other subordinates of the destination Since the entry time and the stay time need to be transmitted between the server 40 and the subordinate server 40 to which the moving body is subordinate, the traffic of the entry time or the stay time can be suppressed.

  Further, in the mobile body position tracking system 10, the lower server stay time measurement processing means 46 of the lower server 40, the lower server stay time registration processing means 26 of the upper server 20, and the mobile body position information database 30 are configured so that the mobile body moves in this manner. The destination lower-level server 40 and the destination upper-level server only when entering the jurisdiction area of the lower-level server 40 under the higher-level server 20 other than the higher-level server 20 with which the body is dependent and when leaving the jurisdiction area Therefore, traffic can be suppressed. That is, even if the moving body moves within the jurisdiction area of the lower server 40 that is the moving destination, the traffic of the entry time or the staying time does not occur. Traffic does not occur unless it enters the jurisdiction area of the host server 20 from the outside.

  Further, in the mobile body position tracking system 10, the mobile body position information registration processing means 43, the upper server stay time registration processing means 48 of the lower server 40, the mobile body position information database 50, and the upper server stay time measurement of the upper server 20 are measured. The processing means 24 and the upper server stay time transfer processing means 25 are used when the mobile body enters the jurisdiction area of the upper server 20 other than the upper server 20 of the lower server 40 to which the mobile body is subordinate, and exits from this jurisdiction area. Only when the destination server 40 and the destination host server 20 are moved, between the destination host server 20 and the host server 20 to which the mobile body is subordinate, and the host server 20 to which the mobile body is subordinate. And the subordinate server 40 to which the mobile body is subordinate, the entry time and the stay time need to be transmitted. It is possible to suppress. In other words, even if the moving body moves within the jurisdiction area of the higher-level server 20 that is the moving destination, traffic at the entry time or staying time does not occur. Traffic does not occur unless it enters the jurisdiction area of the host server 20 from the outside.

  Since the mobile body position tracking system 10 includes the browsing processing means 49 of the lower server 40 and the browsing processing means 27 of the upper server 20, the mobile body position information database 50 (see FIGS. 5 and 12) of each lower server 40. The position information can be effectively searched using the position information of the mobile objects distributed and managed in (Ref.).

  Further, since the browsing processing means 49 can accept the three types of accuracy designation and search for the position information of the moving body, it can satisfy various requests of the position information user. Furthermore, the browsing processing means 49 is configured to transmit an inquiry signal to the destination higher-level server 20 and / or the destination lower-level server 40 only when detailed location information of the moving object is required. Location information traffic can be minimized.

  Note that the present invention is not limited to the above-described embodiment, and modifications and the like within a scope where the object of the present invention can be achieved are included in the present invention.

  For example, in the above-described embodiment, tracking of the position of the moving body is realized by a wireless communication connection between the wireless IC tag 70 attached to the moving body and the wireless IC tag reader 60 installed in various places. The mobile phone is not limited to the wireless IC tag 70, and a mobile terminal device having a wireless LAN function such as a PDA or a mobile phone carried by a mobile body is used, and the wireless IC tag reader 60 is installed in various places. Tracking the position of the moving body may be realized by using the access point. In this case, identification of a portable terminal device such as a PDA or a cellular phone carried by the mobile body can be performed by, for example, a MAC address, and the position can be identified by, for example, a BSSID of an access point.

  In the above embodiment, the wireless IC tag 70 has been described on the assumption that the same type of tag is used. However, in a network environment in which a plurality of types of tags are mixed, movement obtained from different types of tags is used. It is good also as a structure which converts the positional information on a body into the expression format unified by the low-order server 40. FIG.

  Further, in the above embodiment, detailed description is omitted, but the cover ranges of the wireless IC tag readers 60 may overlap each other or may be slightly apart from each other (within a predetermined time interval). , There may be a case where movement between the cover ranges of the adjacent wireless IC tag readers 60 can be performed. When the cover ranges of the wireless IC tag readers 60 overlap, a plurality of wireless IC tag readers 60 can receive signals from the same wireless IC tag 70. Therefore, if the cover ranges of a plurality of wireless IC tag readers 60 connected to the same lower server 40 overlap, it is necessary to devise identification of the position information at the tag reader installation position level. If the cover ranges of the wireless IC tag readers 60 connected to the different lower servers 40 overlap, it is necessary to devise to identify the position information at the lower server 40 level. If the cover ranges of the connected wireless IC tag readers 60 are overlapped, it is necessary to devise identification of position information at the level of the upper server 20.

  In such a case, when there is a browsing request from the position information user, the position information may be provided to the position information user in an overlapping state without performing any special processing. However, by using a positioning algorithm that estimates the position of the mobile body based on the radio field intensity of the mobile body (wireless IC tag 70) received by the plurality of wireless IC tag readers 60, the mobile body (wireless IC tag 70) can be more accurately detected. Position information can be estimated, and more accurate position information can be provided to a position information user. For this reason, if the embodiment and the positioning algorithm are combined, more accurate position information can be estimated. In the above-described embodiment, when one mobile body (one wireless IC tag 70) is connected to a plurality of wireless IC tag readers 60, the mobile body location information database 50 of the lower server 40 includes each wireless body. Since the information of the wireless IC tag 70 received by the IC tag reader 60 is recorded, one mobile body (one wireless IC tag 70) has a jurisdiction area for a plurality of lower servers 40 or a jurisdiction area for a plurality of upper servers 20. It is possible to move by.

  As described above, the mobile object position tracking system and program of the present invention connect, for example, layered servers via a network, and current position information of a mobile object such as a person or an object moving in a large-scale facility or region. And location information related to movement history information is suitable for use in distributed management within a network.

1 is an overall configuration diagram of a mobile object position tracking system according to an embodiment of the present invention. The detailed block diagram of the main components of the mobile body position tracking system of the said embodiment. The record block diagram of the mobile body location information database of the high-order server of the said embodiment. The block diagram of the server information table memory | storage means of the high-order server of the said embodiment. The record block diagram of the mobile body location information database of the low-order server of the said embodiment. The block diagram of the tag reader information table memory | storage means of the said embodiment. The block diagram of the server information table memory | storage means of the low-order server of the said embodiment. The block diagram of the tag reader information storage means of the said embodiment. The block diagram of the tag identification information storage means of the said embodiment. FIG. 3 is a relationship diagram between a jurisdiction area of an upper server and a jurisdiction area of a lower server in the mobile body position tracking system of the embodiment. The sequence diagram which shows the example of the flow of registration of the positional information and transmission / reception process accompanying the movement of the mobile body in the said embodiment. The figure which shows the example of registration of the positional information on the mobile body positional information database by the sequence of FIG. The sequence diagram which shows the example which provides the positional information on a moving body according to the precision of the positional information which the positional information user designated in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile body 2 Network 10 Mobile body position tracking system 20, 20A, 20B Higher server 22 Higher server mobile body position information registration processing means 23 Higher server mobile body position information transfer processing means 24 Higher server stay time measurement processing means 25 Upper Server stay time transfer processing means 26 Lower server stay time registration processing means 27 Upper server browsing processing means 30 Upper server mobile body location information database 40, 40A, 40B, 40C, 40D Lower server 42 Connection monitoring processing means 43 Lower server Moving body location information registration processing means 44 Lower body server moving body location information transfer processing means 45 Connection time measurement processing means 46 Lower server stay time measurement processing means 47 Lower server stay time registration processing means 48 Upper server stay time registration processing means 49 Lower Server browsing processing means 5 0 Mobile server location information database of lower servers 60, 60A, 60B, 60C, 60D, 60E, 60F, 60G, 60H Wireless IC tag reader 70 Wireless IC tag 80 User terminal device

Claims (9)

One or more upper servers connected to each other via a network;
One or more subordinate servers interconnected by the network under each of the upper servers;
A non-contact type wireless IC tag attached to a mobile object to be tracked subordinate to one specific upper server and one specific lower server, or a mobile terminal device with a wireless LAN function carried by the mobile body; ,
A wireless IC tag reader that is wirelessly connectable to the wireless IC tag that is installed in the mobile body that is installed in the jurisdiction area of the subordinate server and moves within the jurisdiction area, or the mobile that the mobile body carries With a terminal device and an access point that can be connected wirelessly,
The wireless IC tag or the mobile terminal device is
Tag identification information storage means for storing tag identification information including a tag identifier for identifying the wireless IC tag, or portable terminal device identification information for storing portable terminal device identification information including a portable terminal device identifier for identifying the portable terminal device A storage means,
The subordinate server is
Position information of the mobile body subordinate to the subordinate server itself that entered the jurisdiction area of the subordinate server itself, position information of the mobile body subordinate to another subordinate server that entered the jurisdiction area of the subordinate server itself, And the position information of the mobile body subordinate to the lower server itself that entered the jurisdiction area of another lower server, the tag identification information, the mobile terminal device identification information, or the mobile body identification information associated therewith A moving body location information database stored in correspondence with
Position identification information and tag identification information or portable terminal device identification information transmitted from the wireless IC tag reader connected to the wireless IC tag or the access point connected to the portable terminal device Connection monitoring processing means for executing processing for receiving
The connection monitoring processing means when the mobile body subordinate to the subordinate server itself or the mobile body subordinate to another subordinate server enters the jurisdiction area of the subordinate server itself and moves within the jurisdiction area Processing for storing the position information of the mobile body obtained from the position identification information received by the mobile body position information database in association with the tag identification information, the mobile terminal device identification information, or the mobile body identification information. ,
When the mobile body subordinate to the lower server itself has entered the jurisdiction area of another lower server under the upper server of the lower server itself, the mobile has been directly transferred from the other lower server of the destination A process of storing the position information of the moving object in the moving object position information database in association with the tag identification information or the mobile terminal device identification information or the moving object identification information;
In addition, when the mobile body subordinate to the lower server itself enters the jurisdiction area of any lower server under the upper server other than the upper server of the lower server itself, The mobile body is associated with position information of the mobile body transferred via the upper server of the lower server and the upper server of the lower server itself with the tag identification information, the mobile terminal device identification information, or the mobile body identification information. A moving body position tracking system comprising: moving body position information registration processing means for executing processing to be stored in a position information database. In the tag identification information or the mobile terminal device identification information,
In addition to the tag identifier or the mobile terminal device identifier, there is an identifier of a specific upper server to which the mobile unit is subordinate, and an identifier of a specific lower server to which the mobile unit under the upper server is subordinate. Included,
The subordinate server is
Whether the mobile body that has entered the jurisdiction area of the lower server itself is subordinate to the lower server itself, using the tag identification information or the mobile terminal device identification information received by the connection monitoring processing means, It is determined whether the subordinate is subordinate to another subordinate server under the server's own superordinate server or a subordinate server other than the subordinate server's own superordinate server, and the mobile unit is under the subordinate server's own superordinate server. When subordinate to another subordinate server, the identification information of the subordinate server itself as location information of the mobile object is directly transferred to the subordinate server to which the mobile object is subordinate via the network, and the mobile When the body is subordinate to an upper server other than the upper server of the lower server itself, the identification information of the lower server itself as the position information of the mobile body , Comprising a mobile location information transfer processing means for performing processing of transferring via the network to the child server itself higher server,
The upper server is
The identification information of the lower server as the position information of the mobile body transferred from the lower server of the upper server itself is stored in association with the tag identification information, the mobile terminal device identification information, or the mobile body identification information. A moving body location information database
The identification information of the lower server as the position information of the mobile body transferred from the lower server of the upper server itself is associated with the tag identification information or the mobile terminal device identification information or the mobile body identification information, and Mobile body location information registration processing means for executing processing to be stored in the mobile body location information database of the host server;
When receiving the identification information of the lower server as the position information of the mobile body transferred from the lower server of the upper server itself, the identification information of the upper server itself is used as the position information of the mobile body when the movement information is received. A process of transferring to the upper server to which the body is subordinate via the network, and the identification information of the other upper server as the position information of the moving body transferred from the other upper server, The mobile body position tracking system according to claim 1, further comprising mobile body position information transfer processing means for executing a process of transferring to a lower server to which the mobile body is subordinate. The mobile body location information database of the subordinate server is
Corresponding to the position information of the mobile body, the start time and the connection time to each wireless IC tag reader or each access point installed in the jurisdiction of the lower server itself is also stored,
The mobile body location information registration processing means of the lower server is:
The mobile body subordinate to the subordinate server itself or the mobile body subordinate to another subordinate server enters the coverage area of each wireless IC tag reader or each access point installed in the jurisdiction of the subordinate server itself In this case, the connection start time to the wireless IC tag reader or the access point is set in correspondence with the position information of the mobile body obtained from the position identification information received by the connection monitoring processing means. It is configured to execute processing to be stored in the mobile body position information database,
The subordinate server is
Measure the connection time to each wireless IC tag reader or each access point installed in the jurisdiction area of the subordinate server itself, and the mobile subordinate to the subordinate server itself or the movement subordinate to another subordinate server When the body leaves the coverage area of each wireless IC tag reader or each access point installed in the jurisdiction area of the lower server itself, the measured connection time, the position information of the mobile body and the connection start The mobile body position tracking system according to claim 1, further comprising a connection time measurement processing unit that executes a process of storing the mobile body position information database of the lower server in correspondence with time. The mobile body location information database of the subordinate server is
Corresponding to the position information of the mobile body, the lower server itself is configured to store the entry time and stay time in the jurisdiction area of other lower servers under the upper server of the lower server itself,
The mobile body location information registration processing means of the lower server is:
When the mobile body subordinate to the lower server itself enters the jurisdiction area of another lower server under the upper server of the lower server itself, the position of the mobile body directly from the other lower server of the destination Execute the process of storing the entry time to the jurisdiction area of the other subordinate server of the destination that has been transferred together with the information in the mobile unit location information database of the subordinate server in association with the location information of the mobile unit And is configured to
The subordinate server is
Measures the time spent in the jurisdiction area of the subordinate server for the subordinate server that is subordinate to another subordinate server of the subordinate server itself, and the mobile object leaves the jurisdiction area of the subordinate server itself In this case, the lower server stay time measurement processing means for executing a process of directly transmitting the measured stay time to the other lower server to which the mobile object is subordinate via the network;
The stay time transferred from another lower server under the upper server of the lower server itself to which the mobile body depends is associated with the position information of the mobile body and the entry time of the lower server itself. The mobile body position tracking system according to any one of claims 1 to 3, further comprising lower-level server stay time registration processing means for executing processing to be stored in the mobile body position information database. The subordinate server is
When the time spent in the jurisdiction area of the subordinate server itself for the mobile body subordinate to the superordinate server other than the superordinate server of the subordinate server itself is measured, and the mobile object leaves the jurisdiction area of the subordinate server itself The lower server stay time measurement processing means for executing the process of transmitting the measured stay time to the upper server of the lower server via the network,
The upper server is
The stay time in the jurisdiction area of the lower server transmitted from the lower server under the upper server itself is received, and the received stay time is sent to the location information of the mobile object and the jurisdiction area of the lower server. 5. The movement according to claim 1, further comprising: a lower server stay time registration processing unit that executes a process of storing in the moving body location information database of the upper server itself in association with an entry time. Body position tracking system. The mobile body location information database of the subordinate server is
Corresponding to the position information of the mobile body, it is configured to store the entry time and stay time in the jurisdiction area of the upper server other than the upper server of the lower server itself,
The mobile body location information registration processing means of the lower server is:
When the mobile body subordinate to the subordinate server itself has entered the jurisdiction area of any subordinate server under a superordinate server other than the superordinate server to which the mobile body is subordinate, The entry time to the jurisdiction area of the destination higher-order server transferred together with the position information of the moving object via the server and the higher-level server on which the moving object is subordinated is associated with the position information of the moving object. It is configured to execute processing to be stored in the mobile body location information database of the subordinate server itself,
The upper server is
Measure the stay time in the jurisdiction area of the upper server itself for the mobile body subordinate to another upper server, and the measured stay time when the mobile body leaves the jurisdiction area of the upper server itself , Upper server stay time measurement processing means for executing a process of transmitting via the network to the other upper server on which the mobile body is subordinate,
The stay time transmitted from a host server other than the host server itself on which the mobile body is subordinate is received, and the received stay time is transferred to a subordinate server on which the mobile body under the host server is subordinate. A host server stay time transfer processing means for executing the processing to perform,
The subordinate server is
A host that executes a process of storing the stay time transferred from the upper server of the lower server itself in the mobile body position information database of the lower server in association with the position information of the mobile body and the entry time. The mobile unit position tracking system according to any one of claims 1 to 5, further comprising server stay time registration processing means. The subordinate server is
As the search request signal for position information related to the current position information and / or movement history information of the mobile body from the user terminal device, the tag identification information or the mobile terminal device identification information input from the user terminal device or the Position information of the mobile body obtained by receiving mobile body identification information, searching the mobile body position information database using the tag identification information, the mobile terminal device identification information, or the mobile body identification information The mobile body position tracking system according to any one of claims 1 to 6, further comprising browsing processing means for executing processing for transmitting the information to the user terminal device via the network. The browsing processing means of the lower server is:
Tag reader level or access requesting display of position information up to the coverage area of the wireless IC tag reader or the access point as a search request signal for position information of the mobile body subordinate to the subordinate server itself from the user terminal device Point level accuracy specification, lower server level accuracy specification requesting display of position information up to the subordinate server's jurisdiction area, upper server level accuracy specification requesting display of position information up to the supervising area of the upper server Accepts at least three types of accuracy specifications,
When the accuracy designation at the tag reader level or the access point level is accepted, the tag identification information, the mobile terminal device identification information, or the mobile object identification information is used for position information in the jurisdiction area of the lower server itself. The subordinate server itself searches the mobile body location information database to obtain the location information of the mobile body, and performs display processing on the user terminal device. For the position information in the jurisdiction area of the other lower server, the inquiry signal is transmitted to the other lower server, and the position information of the corresponding mobile body returned from the other lower server is received and used. For the location information in the jurisdiction area of the upper server other than the upper server of the lower server itself, The user terminal device transmits an inquiry signal to an upper server other than the upper server of the lower server itself, receives position information of the corresponding mobile body returned from the upper server other than the upper server of the lower server itself, and Execute the display process to
When the accuracy designation at the lower server level is accepted, the position information in the jurisdiction area of the lower server itself and the position information in the jurisdiction area of other lower servers under the upper server of the lower server itself, Using the tag identification information, the mobile terminal device identification information, or the mobile object identification information, the mobile server position information database of the lower server itself is searched to obtain the position information of the corresponding mobile object and the user Display processing on the terminal device, and for the location information in the jurisdiction of the upper server other than the upper server of the lower server itself, send an inquiry signal to the upper server other than the upper server of the lower server itself, The user terminal device that receives the position information of the corresponding mobile unit returned from a host server other than the host server of the server itself Run the display processing,
When the accuracy specification at the upper server level is received, the position information in the jurisdiction area of the lower server itself, the position information in the jurisdiction area of other lower servers under the upper server of the lower server itself, and the For any position information in the jurisdiction area of the upper server other than the upper server of the lower server itself, the mobile body of the lower server itself using the tag identification information, the mobile terminal device identification information, or the mobile body identification information. While searching the position information database to acquire the position information of the corresponding mobile body and executing the display process on the user terminal device,
When the inquiry signal from the upper server of the lower server itself is received together with information indicating the accuracy specification of the tag reader level or the access point level, the tag identification information or the mobile terminal device identification information or the mobile object identification information is Use the lower server's own mobile body location information database to retrieve the relevant mobile body's location information and execute a process of returning to the inquirer's upper server,
When an inquiry signal from another lower server under the upper server of the lower server is received together with information indicating the accuracy specification of the tag reader level or access point level, the tag identification information or the mobile terminal device identification information Alternatively, the mobile body location information database of the lower-level server itself is searched using the mobile body identification information, and the position information of the mobile body is acquired and returned to the other lower-order server that is the inquiry source. And is configured to
The upper server is
When the inquiry signal from the lower server under the other upper server is received together with the information indicating the accuracy designation of the tag reader level or the access point level, the inquiry signal is transmitted to the lower server under the upper server itself, The process of receiving the position information of the corresponding mobile unit returned from the lower server under the upper server itself and executing a process of returning to the lower server under the other upper server as the inquiry source,
When an inquiry signal from a lower server under another upper server is received together with information indicating accuracy specification at the lower server level, the tag identification information, the mobile terminal device identification information, or the mobile object identification information is used. Browsing processing means for searching the mobile server location information database of the higher-level server itself to acquire the location information of the corresponding mobile body and returning the information to a lower-level server below the other higher-level server that is the inquiry source The mobile body position tracking system according to claim 7, further comprising:   The program for functioning a computer as a moving body position tracking system in any one of Claims 1-8.

Images