JP5932507B2 - Anti-theft server and system - Google Patents

Description

  The present invention relates to an anti-theft server and system.

  Compared to notebook PCs (personal computers), tablet devices are small and light, so they are easy to carry around, and can be used anytime because applications can be started immediately. It has various conveniences. Therefore, the tablet terminal can be used not only for personal use but also for business support in a wide range of fields such as sales, sales or service industry. Applications for business use include, for example, display of product advertisements on counters and display shelves, customer service support tools such as inventory confirmation at retail stores, sales support tools such as making estimates at insurance companies, and points in the service industry Applications, electronic business manuals in the transportation industry, and auxiliary tools in educational settings.

  However, while the tablet terminal has the convenience described above, it is easy to carry, so there is a high possibility of loss or theft, and since the application can be started immediately, confidential data such as personal information and trade secrets is not stored. Since it is easily obtained by the three parties and can access the Internet wirelessly without choosing a place, the tablet terminal may be misused for illegal purposes when it is stolen.

  On the other hand, as a burglar alarm system for preventing such theft, when a monitoring target device connected to a portable server and Bluetooth (registered trademark) is taken out of a predetermined area and communication becomes impossible, There has been proposed a technique for notifying a theft of the monitored device by issuing an alarm from a server (see, for example, Patent Document 1).

JP 2005-150863 A

  However, when a tablet terminal is used for business support, for example, in a situation where a plurality of tablet terminals are used in a store such as a department store, an alarm is given to the entire floor when one tablet terminal is taken away by a thief. If it is issued, there is a risk of hindering the work of the entire floor, which is not preferable for customers.

  In view of such circumstances, even if a tablet terminal is stolen, it is possible to take a prompt and appropriate response to the theft without impeding the progress of the entire business, and further theft of peripheral tablet terminals There has been a need for an anti-theft server and system capable of suppressing damage.

  The present invention relates to a communication unit that performs wireless communication with a plurality of communication terminals, a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication, and the position and a time when the position is detected. And a control unit for controlling the communication unit, the terminal position detection unit, and the recording unit, and the control unit wirelessly communicates with the plurality of communication terminals in the communication unit. When communication is performed and the terminal position detection unit detects that one communication terminal of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit, the one communication terminal within the communication range The position and time of the last communication terminal detected as the lost position and the lost time of the one communication terminal, respectively, are set in advance from the lost position after a predetermined warning waiting time has elapsed from the lost time. A predetermined warning is transmitted to the communication unit for the plurality of communication terminals within a predetermined warning range, and the warning includes at least information identifying the one communication terminal, the lost position, and the lost An anti-theft server that provides time is provided.

  The present invention also includes a plurality of communication terminals, a communication unit that performs wireless communication with the plurality of communication terminals, a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication, the position and the position And a server that includes a recording unit that records as position information in association with the time at which detection is performed, and a communication unit, a control unit that controls the terminal position detection unit, and the recording unit, and the control unit is connected to the communication unit. The terminal position detection unit detects that one of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit. In this case, the position and time at which the one communication terminal was last detected in the communication range are determined in advance from the lost time as the lost position and the lost time of the one communication terminal, respectively. A predetermined warning is transmitted to the plurality of communication terminals within a predetermined warning range from the lost position after the warning waiting time has elapsed, and the warning is at least one of the ones An antitheft system that provides information for identifying a communication terminal, the lost position, and the lost time is provided.

  According to this invention, the control unit causes the communication unit to perform wireless communication with the plurality of communication terminals every time, and one communication terminal of the plurality of communication terminals is predetermined by the communication unit. When the terminal position detection unit detects that the terminal does not exist within the range, the position and time at which the one communication terminal was last detected within the communication range are the lost position and the lost time of the one communication terminal, respectively. In order to cause the communication unit to transmit a predetermined warning to the plurality of communication terminals that are within a predetermined warning range from the lost position after a predetermined warning waiting time has elapsed since the loss time. When a communication terminal is taken out of the predetermined communication range, a warning message is sent to the communication terminal around the lost point of the communication terminal to alert the owner of the surrounding communication terminal This makes it possible to take a quick and appropriate response to theft without issuing an alarm to the entire floor and hindering the progress of the entire business, and can also prevent damage from further theft. Is realized.

  In addition, the warning finds the stolen communication terminal based on information included in the warning transmitted from the server in order to provide at least information for identifying the one communication terminal, the lost position, and the lost time. It is possible to grasp clues to prevent theft of communication terminals, and to take appropriate measures at an early stage to prevent theft of communication terminals, and to prevent further theft damage, such as keeping nearby communication terminals away from theft locations Measures can be taken.

It is a block diagram which shows the structure of the anti-theft corresponding system which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the server which concerns on 1st Embodiment of this invention. It is a flowchart which shows the process of the server which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the correspondence of the communication terminal and access point apparatus which concern on 1st Embodiment of this invention.

  The present invention relates to a communication unit that performs wireless communication with a plurality of communication terminals, a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication, and the position and a time when the position is detected. And a control unit for controlling the communication unit, the terminal position detection unit, and the recording unit, and the control unit wirelessly communicates with the plurality of communication terminals in the communication unit. When communication is performed and the terminal position detection unit detects that one communication terminal of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit, the one communication terminal within the communication range The position and time of the last communication terminal detected as the lost position and the lost time of the one communication terminal, respectively, are set in advance from the lost position after a predetermined warning waiting time has elapsed from the lost time. A predetermined warning is transmitted to the communication unit for the plurality of communication terminals within a predetermined warning range, and the warning includes at least information identifying the one communication terminal, the lost position, and the lost An anti-theft server that provides time is provided.

  The present invention also includes a plurality of communication terminals, a communication unit that performs wireless communication with the plurality of communication terminals, a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication, the position and the position And a server that includes a recording unit that records as position information in association with the time at which detection is performed, and a communication unit, a control unit that controls the terminal position detection unit, and the recording unit, and the control unit is connected to the communication unit. The terminal position detection unit detects that one of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit. In this case, the position and time at which the one communication terminal was last detected in the communication range are determined in advance from the lost time as the lost position and the lost time of the one communication terminal, respectively. A predetermined warning is transmitted to the plurality of communication terminals within a predetermined warning range from the lost position after the warning waiting time has elapsed, and the warning is at least one of the ones An antitheft system that provides information for identifying a communication terminal, the lost position, and the lost time is provided.

The “server” is not only a device that performs wireless communication with a communication terminal by relaying an access point (wireless bridge or the like) having a wireless communication function with the communication terminal, but is configured as an apparatus integrated with the access point, for example. It may perform wireless communication with a communication terminal. Moreover, you may perform radio | wireless communication simultaneously with many communication terminals at once via a some access point. Furthermore, a server function may be given to a specific communication terminal selected from among a plurality of communication terminals.
The “communication range” is not limited to the range determined by the wireless communication connection status between the server and the communication terminal, and may be, for example, a range in which the signal strength of the wireless communication is equal to or higher than a predetermined reference value. . Moreover, it may be configured not only from a communication range based on a single server or access point, but also from a communication range based on a combination of a plurality of access points.

“Warning” is not only performed through either audio display or visual display, but may be performed through, for example, either audio display or visual display, and is a display appealing to the senses other than audio or visual. It may be performed through any combination of methods. Further, the display format of “warning” is not necessarily the same, and a different message or expression format may be used each time depending on the number of times and the elapsed time.
“Warning standby time” is a standby time until a warning is issued after it is detected that the communication terminal is outside the communication range. When the warning waiting time is set to zero, a warning is displayed immediately after it is detected that the communication terminal is out of the communication range.

  In the anti-theft communication terminal according to the present invention, when the terminal position detection unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time after transmitting the warning. The control unit causes the communication unit to transmit a predetermined re-warning to the plurality of communication terminals after the re-warning waiting time elapses, and the re-warning identifies at least the one communication terminal. Information, the lost position and the lost time, while the terminal position detecting unit detects that the one communication terminal is within the communication range within the re-warning waiting time. The unit is configured so that the position and time at which the one communication terminal is detected again within the communication range are set as the rediscovery position and rediscovery time of the one communication terminal, respectively, with respect to the plurality of communication terminals. The rediscovery report determined may be transmitted to the communication unit, and the rediscovery report may provide information identifying at least the one communication terminal, the rediscovery position, and the rediscovery time. .

In this way, when the terminal position detection unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time after the transmission of the warning, the control unit After the elapse of the rewarning waiting time, the communication unit transmits a predetermined rewarning to the plurality of communication terminals, and the rewarning is information for identifying at least the one communication terminal, After sending a warning to surrounding communication terminals to provide the lost location and the lost time, if the stolen communication terminal is not returned to its original location and the possibility of theft of the communication terminal is still high, a warning It is possible to continue to alert the owner of the peripheral communication terminal to the thief who is likely to be in the vicinity by continuously transmitting the re-warning to the communication terminal to which is transmitted .
In addition, when the terminal position detection unit detects that the one communication terminal exists within the communication range within the re-warning waiting time, the control unit detects that the one communication terminal is within the communication range. The rediscovered position and time detected as the rediscovered position and rediscovered time of the one communication terminal are transmitted to the communication unit as predetermined rediscovery reports to the plurality of communication terminals, and the rediscovery is performed. The report provides at least information identifying the one communication terminal, the rediscovery position and the rediscovery time, so that if the stolen communication terminal is returned to its original location, the possibility of theft of the communication terminal When a report indicating that the stolen communication terminal has been returned to the original communication terminal is sent to the communication terminal that received the warning, it becomes possible to immediately resume the business. .

  In the anti-theft communication terminal according to the present invention, after the re-warning is transmitted, the terminal position detecting unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time. In this case, the control unit causes the plurality of communication terminals to transmit the re-warning again to the plurality of communication terminals after the re-warning waiting time has elapsed, while the one communication terminal is within the re-warning waiting time. When the terminal position detection unit detects that the communication unit is within the communication range, the control unit may cause the communication unit to transmit the rediscovery report to the plurality of communication terminals. .

In this way, when the terminal position detection unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time after the re-warning is transmitted, The unit is stolen after sending a re-warning to surrounding communication terminals to cause the communication unit to send the re-warning again to the plurality of communication terminals after the re-warning waiting time has elapsed. If the communication terminal is not returned to the original location, it is determined that the possibility of the communication terminal being stolen is still high, and the re-warning is continuously transmitted to the communication terminal to which the re-warning is transmitted. Until it is determined that the possibility of theft is low, it is possible to continue to call attention to a thief who is likely to be in the vicinity.
In addition, when the terminal position detection unit detects that the one communication terminal is within the communication range within the re-warning waiting time, the control unit transmits the communication unit to the plurality of communication terminals. If the stolen communication terminal is returned to its original location in order to send the rediscovery report to the communication terminal, it is determined that the possibility of the communication terminal being stolen is low, and the warning is sent to the communication terminal By transmitting a report of rediscovery of the communication terminal, it becomes possible to resume the business immediately.

[First Embodiment]
Next, the anti-theft server and anti-theft system according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram showing the configuration of a theft prevention response system according to the first embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the server according to the first embodiment of the present invention. FIG. 3 is a flowchart showing the processing of the server according to the first embodiment of the present invention. FIG. 4 is an explanatory diagram showing a correspondence relationship between the communication terminal and the access point device according to the first embodiment of the present invention.

As shown in FIG. 1, an anti-theft system 100 according to the first embodiment of the present invention functions as tablet terminals 1a to 1d, portable terminals 4a and 4b, an access point device 2 that functions as an access point, and a server. PC3 is provided.
Note that the tablet terminals 1a to 1d and the portable terminals 4a and 4b are merely examples, and the number and combination thereof can be arbitrarily determined by prior settings.

The communication unit of the present invention corresponds to the access point device 2. The anti-theft server of the present invention is realized in cooperation with the access point device 2 and the PC 3 . The communication terminals of the present invention correspond to tablet terminals 1a to 1d and portable terminals 4a and 4b.

The tablet terminals 1a to 1d are information processing terminals having a wireless communication function.
The access point device 2 is a device that has a wireless communication function and a router function, interconnects the tablet terminals 1a to 1d and the PC 3, and relays data transmission / reception. Examples of the wireless communication standard include Bluetooth (registered trademark) and standards conforming to IEEE802.11a, IEEE802.11b, IEEE802.11g, and IEEE802.11n, which are wireless LAN standards.
The PC 3 is an apparatus that is connected to the access point device 2 and performs data processing and management by transmitting and receiving data to and from the tablet terminals 1a to 1d via the access point device 2.
The portable terminals 4a and 4b are communication terminals that transmit and receive messages via the Internet or public wireless lines.

Next, based on FIG. 2, the structure of PC3 based on 1st Embodiment of this invention is demonstrated.
As shown in FIG. 2, the PC 3 includes a CPU 10, a terminal position detection unit 11, a data transmission / reception unit 12, a nonvolatile memory 13, a main storage device 14, and a timer 15.

  The recording unit of the present invention corresponds to the main storage device 14. The control unit of the present invention corresponds to the CPU 10.

The CPU 10 is an arithmetic device that performs control processing of various devices, processing of an operating system, application software, and the like.
The terminal position detection unit 11 detects the positions of the tablet terminals 1 a to 1 d based on radio communication radio waves collected from the access point device 2.
As a specific position detection method of the terminal position detection unit 11, for example, radio waves transmitted from the wireless base stations are collected by the tablet terminals 1a to 1d and combined with the position information specified by the global positioning system (GPS). Then, after creating the database, there is a method of specifying the positions of the tablet terminals 1a to 1d based on the radio wave received from the radio base station and the database. As an example of a method for estimating the position of such a wireless LAN compatible device, for example, a method described in Japanese translations 2010-5050971 can be cited.
The data transmission / reception unit 12 transmits / receives data to / from the access point device 2. Further, data may be transmitted / received through a public wireless communication network.
The non-volatile memory 13 is a non-volatile storage device such as a hard disk or a flash memory in which programs and data such as control processes of various devices, an operating system, and application software are stored.
The main storage device 14 is a main storage device in which programs and data such as control processing of various devices, an operating system, and application software are stored.
The timer 15 cooperates with the CPU 10 to measure a waiting time until a warning / re-warning is issued after it is detected that the tablet terminals 1a to 1d are out of the communication range.

<Server pre-configuration>
Users, in advance of setting, registers the information of the tablet terminal 1a~1d of interest for wireless communication with the access point device 2 in the P C3.
The range of the wireless communication area 200 is set to a range that can be handled by the user when a situation occurs in which the tablet terminals 1a to 1d are taken away by a theft, such as a specific sales floor in a store or a specific area in a business site. Keep it. For example, when the range of the wireless communication area 200 is set in the floor of the home appliance, when the thief takes the tablet terminal 1a out of the floor of the home appliance without permission, the surrounding tablet terminals 1b to 1d in the floor or A warning message is transmitted to the mobile terminals 4a and 4b outside the floor. In this case, the owner of the tablet terminals 1a to 1d includes, for example, a person in charge of the household electrical appliance floor or a guide, and the owner of the portable terminals 4a and 4b is, for example, a cashier in charge outside the household electrical appliance floor. And security officers.

A plurality of access point devices 2 may be connected to one PC 3 . For example, by installing the access point device 2 on each of a plurality of floors, such as a combination of a home appliance floor and a repair service floor, and constructing a wireless communication area 200 composed of the access point devices 2 on each floor A more flexible utilization method of the tablet terminals 1a to 1d extending over a plurality of floors can also be realized.

  Furthermore, a predetermined range from the point where the theft occurred is set in advance as the warning range 300. After the theft occurs, a warning message or the like is notified to the tablet terminals 1b to 1d within the warning range 300.

<Server processing>
Next, based on FIG. 3, the process of PC3 according to the first embodiment of the present invention will be described. Hereinafter, an example in which the tablet terminal 1a is targeted for theft will be described, but the same applies to the case where the other tablet terminals 1b to 1d are targeted. The same processing is also performed when two or more tablet terminals 1b to 1d are stolen.

  As shown in FIG. 3, the CPU 10 causes the access point device 2 to execute wireless communication every time for the tablet terminals 1 a to 1 d (step S <b> 1).

In the subsequent step S2, the CPU 10 confirms the connection status between the access point device 2 and the tablet terminals 1a to 1d, causes the terminal position detection unit 11 to detect the positions of the tablet terminals 1a to 1d, and determines those positions as time. At the same time, it is held in the main storage device 14 (step S2). Also, when the mobile terminal 4a and 4b are registered in P C3, even the mobile terminal 4a and 4b, to retain their position together with the time in the main memory 14.
Incidentally, if the omitted as in step S3 to S9 will be described later, even while the step S3 to S9, among the tablet terminal 1a~1d to (mobile terminals 4a and 4b are registered in P C3 is the mobile terminal 4a and 4b), the CPU 10 shall perform the same processing as step 2 every time the communication is not disconnected.

Next, in step S3, when the wireless communication is disconnected between the access point device 2 and the tablet terminal 1a (when the determination in step S3 is Yes), the CPU 10 proceeds to step S4, and the communication is disconnected. The timer 15 counts the elapsed time from the time point, and determines whether or not the access point device 2 has been reconnected to the wireless communication with the tablet terminal 1a after the elapse of a predetermined warning waiting time (step) S4).
On the other hand, when the wireless communication is not disconnected between the tablet terminal 1a and the access point device 2 (when the determination in step S3 is No), the CPU 10 returns to step S1 and performs the processes of steps S1 to S3. repeat.

  Next, in step S4, when the wireless communication is not reconnected between the access point device 2 and the tablet terminal 1a (when the determination in step S4 is No), the CPU 10 proceeds to step S5, Of the position and time of the tablet terminal 1a held in the storage device 14, the position and time recorded immediately before disconnection of the wireless communication are set as a lost point LP and a lost time LT of the tablet terminal 1a (step S5).

  In subsequent step S6, the CPU 10 causes the access point device 2 to transmit a predetermined warning message to registered terminals that are within the warning range 300 from the lost point LP (step S6).

  Next, in step S7, the CPU 10 causes the timer 15 to count the elapsed time after sending the warning message, and after the predetermined re-warning standby time has elapsed, the access point device 2 wirelessly communicates with the tablet terminal 1a. It is determined whether or not communication reconnection has been performed (step S7).

In step S7, when the wireless communication is reconnected between the access point device 2 and the tablet terminal 1a (when the determination in step S7 is Yes), the CPU 10 sends the warning message to the terminal that has transmitted the warning message. The access point device 2 is caused to transmit a predetermined rediscovery message (step S8).
On the other hand, in step S7, when the wireless communication is not reconnected between the tablet terminal 1a and the access point device 2 (when the determination in step S7 is No), the CPU 10 sends the warning message to the terminal that transmitted the warning message. On the other hand, a predetermined re-warning message is transmitted to the access point device 2 (step S9), and the process of step S7 is repeated.

  In this way, if the tablet terminal 1a is not returned to the wireless communication area 200 even after the warning waiting time has elapsed while leaving the wireless communication area 200, the tablet terminal 1a is likely to be stolen. A warning message is sent from the lost point LP of the tablet terminal 1a to a terminal within the warning range 300 to alert the owner of the terminal, thereby giving an alarm to the entire floor and Without hindering the progress, it is possible to take a prompt and appropriate response to the theft, and to prevent further theft damage.

<Specific examples of server processing>
Next, a specific example of PC3 processing according to the first embodiment of the present invention will be described with reference to FIG.

The access point device connected to the P C3 2 attempts逐時wireless communication with the tablet device 1a~1d registered beforehand. The PC 3 confirms the positions of the tablet terminals 1a to 1d and the wireless communication connection status, and causes the main storage device 14 to hold these positions and times.

  Here, as shown in FIG. 4, the holder of the tablet terminal 1a moves outside the wireless communication area 200 (consisting of the A floor, the B floor, the C floor, and the E exit) along the movement route MA. Assuming that At this time, if the wireless communication between the access point device 2 and the tablet terminal 1a is disconnected, and the wireless communication is not reconnected even after the warning waiting time has elapsed after the disconnection, the tablet terminal 1a may be stolen. It is estimated that the possibility is high, and the CPU 10 causes the main storage device 14 to hold the position (B floor) of the tablet terminal 1a immediately before the wireless communication is disconnected as the lost point LP and the time as the lost time LT.

Table 1 below, a tablet terminal 1a~1d registered in P C3, and the mobile terminal 4a and 4b, their connection status (communication allowed or incommunicable), type of connection (wireless connection or public wireless connection) and using This shows the relationship with the position.
As shown in Table 1, the access point device 2 can communicate with all terminals except the tablet terminal 1a.

  The CPU 10 causes the access point device 2 to transmit a warning message to the tablet terminals 1b and 1d and the portable terminal 4a within the warning range 300 from the lost point LP. The warning message includes at least information for identifying the tablet terminal 1a (registration number, owner name, etc.), the lost point LP, and the lost time LT.

Table 2 below shows an example of a warning message. As the warning message, a fixed sentence prepared in advance is used in which information (registration number, owner name), loss point LP, and loss time LT of the tablet terminal 1a are input.
In addition, Table 2 assumes the situation where the tablet terminal of the Section Manager (registration number “XX-XXXX-X”) was taken away by a thief on the B floor around 15:00 and taken out of the radio communication area 200. ing.

  By transmitting such a warning message, the holder of the tablet terminals 1b and 1d and the portable terminal 4a in the vicinity of the lost point LP is alerted to the theft, so that a quick and appropriate countermeasure against the theft is possible. Further, since the alarm is not issued to the entire floor, the work on the other floors (A floor and C floor) is not hindered. Further, it is possible to take anti-theft measures such as keeping nearby tablet terminals 1b and 1d and portable terminal 4a that have not been stolen away from the lost point LP in advance, and it is possible to effectively prevent further theft damage.

  Next, if the wireless communication is not reconnected between the access point device 2 and the tablet terminal 1a before the re-warning waiting time elapses after the warning message is transmitted, the CPU 10 It is considered that the device is still outside the radio communication range 200, and it is estimated that the tablet terminal 1a is likely to be stolen.

  Therefore, the CPU 10 causes the tablet terminals 1b and 1d and the portable terminal 4a that have transmitted the warning message to transmit the re-warning message to the access point device 2. Similar to the warning message, the re-warning message also includes at least information for identifying the tablet terminal 1a (registration number, owner name, etc.), lost point LP, and lost time LT.

Table 3 below shows an example of a re-warning message. As the re-warning message, a standard sentence prepared in advance separately from the warning message is used in which information (registration number, owner name) of the tablet terminal 1a, the lost point LP, and the lost time LT are input.
It should be noted that Table 3 shows that even if the section A's tablet terminal (registration number “XX-XXXX-X”) passes the re-warning waiting time taken by the thief on the B floor around 15:00, The situation is assumed that it has been taken out of the room and not returned.

  By sending such a re-warning message, the owner of the tablet terminals 1b and 1d and the portable terminal 4a that sent the warning message is alerted to theft.

  In FIG. 4, after receiving the warning message, the owner of the tablet terminal 1d is moving away from the lost point LP along the movement route MD, but the tablet terminal 1d exists in the warning range 300 when the re-warning message is transmitted. Even if not, the CPU 10 causes the tablet terminal 1d to transmit a re-warning message. Therefore, even if the user is away from the lost point LP when the re-warning message is transmitted, the holder of the tablet terminal 1d can receive the re-warning message, and thus can keep track of the theft situation.

The re-warning message is transmitted to the tablet terminals 1b and 1d and the portable terminal 4a that transmitted the warning message every predetermined time until the tablet terminal 1a is rediscovered.
On the other hand, when the tablet terminal 1a is recovered and the wireless communication is reconnected, it is presumed that the possibility of the theft of the tablet terminal 1a is reduced. Therefore, the CPU 10 transmits the warning message to the tablet terminal 1b that has transmitted the warning message. And 1d, a rediscovery message is transmitted to notify the mobile terminal 4a that the tablet terminal 1a has been rediscovered.

Table 4 below shows an example of a rediscovery message. As the rediscovery message, a fixed sentence prepared in advance separately from the warning / rewarning message is used in which information (registration number, owner name), lost point LP, and lost time LT of the tablet terminal 1a are input.
In addition, Table 4 shows the situation in which the tablet terminal (registration number “XX-XXXX-X”) of Section A was recovered and the wireless communication was reconnected to the access point device 2 at Exit E at 15:10. Assumed.

  Since the transmission of the rediscovery message notifies that the problem has been solved, the owner of the tablet terminals 1b and 1d receiving the rediscovery message returns the tablet terminals 1b and 1d to their original positions. The work can be resumed, and the owner of the portable terminal 4a can also return to normal work.

Incidentally, as shown in FIG. 4, since the tablet terminal 1c is on the A floor outside the warning range 300, no warning / rewarning message is transmitted to the tablet terminal 1c.
As described above, even when the theft of the lost point LP is stolen, the warning message is transmitted only to the owners of the tablet terminals 1b and 1d and the portable terminal 4a around the lost point LP, and the tablet terminal far from the lost point LP. Since no warning message is transmitted to 1c, the work of the owner of the tablet terminal 1c is not hindered.

  In addition, by sending a warning / re-warning message to the mobile terminal 4a via the Internet / public wireless communication network, the terminal owners around the lost point LP are wary of theft even outside the wireless communication area 200. As a result, it is possible to flexibly cope with the theft, making it easier to grasp the clues of the theft of the tablet terminal 1a, and to increase the possibility of further preventing damage from the theft.

  In this way, when the tablet terminal 1a is taken out of the predetermined range, the warning / re-warning message is transmitted to the tablet terminals 1b and 1d around the lost point LP of the tablet terminal 1a and the portable terminal 4a. Attention is given to the theft of the terminal owner. On the other hand, since the warning / re-warning message is not transmitted to the holder of the tablet terminal 1c and the portable terminal 4b far from the lost point LP and no warning is issued, the progress of the entire business is not hindered. This makes it possible to quickly and appropriately deal with theft, and to prevent damage caused by further theft.

1a, 1b, 1c, 1d: tablet computer 2: Access Point Equipment 3: P C
4a, 4b: Mobile terminal 10: CPU
11: Terminal position detection unit 12: Data transmission / reception unit 13: Non-volatile memory 14: Main storage device 15: Timer 100: Anti-theft system 200: Wireless communication range 300: Warning range LP: Lost point LT: Lost time MA, MD : Travel route RA, RB, RC, RD: Wireless connection RDP: Rediscovery point RDT: Rediscovery time PA, PB: Public wireless connection

Claims (4)

As position information in association with a communication unit that performs wireless communication with a plurality of communication terminals, a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication, and the position and the time when the position is detected A recording unit for recording, and a control unit for controlling the communication unit, the terminal position detection unit, and the recording unit,
The control unit causes the communication unit to perform sequential wireless communication with the plurality of communication terminals, and one communication terminal of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit. When the terminal position detection unit detects the position and time when the one communication terminal was last detected within the communication range as the lost position and the lost time of the one communication terminal, respectively. After a predetermined warning waiting time has elapsed, a predetermined warning is sent to the communication unit for the plurality of communication terminals within a predetermined warning range from the lost position,
The anti-theft server that provides at least the information for identifying the one communication terminal, the lost position, and the lost time. After the transmission of the warning, when the terminal position detection unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time, the control unit waits for the re-warning After a lapse of time, a predetermined re-warning is transmitted to the communication unit to the plurality of communication terminals, and the re-warning includes information for identifying at least the one communication terminal, the lost position, and the lost time. Provide
On the other hand, when the terminal position detection unit detects that the one communication terminal exists within the communication range within the re-warning waiting time, the control unit detects that the one communication terminal is within the communication range. The rediscovered position and time detected as the rediscovered position and rediscovered time of the one communication terminal are transmitted to the communication unit as predetermined rediscovery reports to the plurality of communication terminals, and the rediscovery is performed. The anti-theft server according to claim 1, wherein the report provides at least information identifying the one communication terminal, the rediscovery position, and the rediscovery time. When the terminal position detection unit detects that the one communication terminal does not exist within the communication range within a predetermined re-warning waiting time after the re-warning is transmitted, the control unit After the elapse of the waiting time, let the communication unit transmit the re-warning again to the plurality of communication terminals,
On the other hand, when the terminal position detection unit detects that the one communication terminal is within the communication range within the re-warning waiting time, the control unit transmits the communication unit to the plurality of communication terminals. The anti-theft server according to claim 2, which causes the rediscovery report to be transmitted. A plurality of communication terminals; a communication unit that performs wireless communication with the plurality of communication terminals; a terminal position detection unit that detects positions of the plurality of communication terminals based on the wireless communication; and the position and time when the position is detected It consists of a server that includes a recording unit that records as positional information in association with the communication unit, the terminal position detection unit, and a control unit that controls the recording unit,
The control unit causes the communication unit to perform sequential wireless communication with the plurality of communication terminals, and one communication terminal of the plurality of communication terminals does not exist within a predetermined communication range from the communication unit. From the lost time, with the position and time at which the one communication terminal was last detected within the communication range as the lost position and the lost time of the one communication terminal, respectively, After a predetermined warning standby time has elapsed, a predetermined warning is sent to the communication unit for the plurality of communication terminals within a predetermined warning range from the lost position,
The anti-theft system that provides the warning with at least information for identifying the one communication terminal, the lost position, and the lost time.