JPH1094035A - Position monitor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position monitor system by which position information of a plurality of mobile terminal equipments is concentratedly monitored and displayed by avoiding inconvenience in a conventional PHS system that a phone call has been required to recognize where the opposite party is resident between users. SOLUTION: The position monitor system is provided with a position information receiver 4 provided with a reception function receiving information from a public network and a display device 5 that is connected to the position information receiver 4 and provided with an area name file 52 cross-referencing a base station ID and an area name, a mobile terminal equipment 1 calls periodically the position information receiver 4 to send its own terminal number and an ID of a base station 2 whose position is registered, the position information receiver 4 sends the received terminal number and the base station ID to the display device 5, the display device 4 references the area name file 52 to read the area name corresponding to the base station ID and displays the terminal number and the area name at which the terminal equipment is placed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position monitoring system using mobile communication such as PHS, and more particularly to a position monitoring system capable of centrally monitoring position information of a plurality of mobile terminals.

[0002]

2. Description of the Related Art A method of managing location information in a conventional PHS system will be described with reference to FIG. FIG.
1 is a system configuration block diagram of a conventional PHS system. As shown in FIG. 12, a conventional PHS system includes:
A mobile terminal (PHS terminal) 1 ', a base station 2 for performing communication control by performing wireless communication with a mobile terminal 1' in a communication area to be covered, and a telephone public network 3 (including a higher control station). In order to monitor the position information, a higher-order control station or the like connected to the public network 3
And a display device 5 ′ connected to the position registration device 6.

[0005] The location registration device 6 receives and stores the location information of the mobile terminal 1 ′ transmitted from each base station 2, and displays the location information on the display device 5 ′ as necessary. It was like. This location information is originally
The upper-level control station recognizes which base station 2 each mobile terminal 1 ′ is connected to (in which communication area of the base station), and performs communication control such as circuit switching accompanying a call of the mobile terminal 1 ′. It is used.

[0004]

However, in the above-mentioned conventional PHS system, even if location information is managed,
General mobile terminals cannot be used to know the location of other mobile terminals.For example, if a supervisor wants to confirm the location of a subordinate who has a mobile terminal at an office, etc. Call the terminal to hear whereabouts from subordinates, or if a subordinate changes from the location contacted before, call the office every time to notify the location and confirm the location There was a problem that the operation was complicated.

[0005] The present invention has been made in view of the above circumstances, and a position monitor capable of intensively monitoring and displaying position information of a plurality of mobile terminals without a user having to make a call. The purpose is to provide a system.

[0006]

According to a first aspect of the present invention, there is provided a position monitoring system, comprising: transmitting a terminal number and an ID of a registered base station to a public network; A mobile terminal that transmits periodically or through a specific operation via the mobile terminal, receives the terminal number and the ID transmitted from the mobile terminal, converts the ID to a place name, and converts the terminal number and the place name to And the receiving device displays each mobile terminal and the name of the place where the mobile terminal is located, so that the owner of the receiving device can determine the location of a plurality of mobile terminals. Can be easily known, and the user of the mobile terminal can save the trouble of calling and reporting every time the location changes, thereby improving the convenience.

According to a second aspect of the present invention, there is provided a position monitoring system comprising: a plurality of base stations connected via a public network; and a communication area covered by the base stations. A mobile terminal that moves and registers its position in the base station, a position information receiving device that receives data transmitted from the mobile terminal via the public network, and data that is transmitted from the position information receiving device. A display device, wherein the mobile terminal calls the location information receiving device periodically or by a specific operation, and transmits the location registered base station ID and its own terminal number to the location information receiving device. The position information receiving device transmits the terminal number transmitted from the mobile terminal and the base station I
A location information receiving device for receiving the location information D and transmitting the location information to the display device, wherein the display device includes a place name file storing a plurality of sets in which base station IDs and place names are associated with each other; And a display device that, when receiving a terminal number and an ID of a base station, identifies a place name corresponding to the ID of the base station by referring to the place name file, and displays the terminal number and the place name. If a location information receiving device and a display device are provided, the location of each mobile terminal can be easily known via the public network, and the location of the mobile terminal carrier changes. This eliminates the need to call and report each time, thus improving convenience.

According to a third aspect of the present invention, there is provided a position monitoring system, comprising: a plurality of base stations connected via a private communication network; and a communication area covered by the base station. Moving in, the mobile terminal to register the position in the base station, and a position information receiving device that receives data transmitted from the mobile terminal via the private network,
A display device for displaying data transmitted from the location information receiving device, wherein the mobile terminal periodically or by a specific operation to call the location information receiving device, the location of the registered base station A mobile terminal for transmitting an ID and its own terminal number to the position information receiving device, wherein the position information receiving device receives the terminal number and the ID of the base station transmitted from the mobile terminal, and displays the display device. The display device comprises a place name file storing a plurality of sets in which a base station ID and a place name are associated with each other, and a terminal number and a base station I
D, the location device corresponding to the ID of the base station is specified by referring to the location name file when the location information is received, and the display device displays the terminal number and the location name. If a receiver and a display device are provided, the location of each mobile terminal can be easily known via the private network, and the mobile terminal carrier can call and report every time the location changes. Labor can be saved, and convenience can be improved.

[0009]

Embodiments of the present invention will be described with reference to the drawings. A first position monitoring system according to an embodiment of the present invention includes a position information receiving device that communicates with a base station like a mobile terminal such as a PHS terminal, and the position information receiving device connects a public network from each mobile terminal. The position information transmitted via the mobile terminal is received, and the position information of each mobile terminal is displayed on a display device connected to the position information receiving device.

FIG. 1 is a system configuration block diagram of a first position monitoring system (first system) according to an embodiment of the present invention. As shown in FIG. 1, the first position monitoring system includes a base station 2 and a public network 3 as parts similar to the conventional one, and has a PH as a characteristic part of the first system.
The mobile terminal 1 includes a mobile terminal 1 such as an S terminal, a position information receiving device 4, and a display device 5 having a display unit 53. Further, the display device 5 is provided with a storage unit 51 for storing position information and a place name file 52 for associating position information with place names. Here, the position information receiving device 4 and the display device 5
The following describes an example in which a supervisor carries the mobile terminal 1 and monitors the location of a subordinate who carries the mobile terminal 1.

The characteristic part of the first system will be specifically described. First, the mobile terminal 1 transmits position information indicating its own position to the position information receiving device 4 in addition to the function as a normal mobile terminal. Here, it is assumed that a subordinate who reports the position is carrying.

[0012] The mobile terminal 1 transmits the I
A location information storage area for storing D (base station ID) and a timer (not shown) are provided, and a telephone number of the location information receiving device 4 is stored in advance. The mobile terminal 1 communicates with the base station 2 covering the area where the mobile terminal 1 is located, and when performing position registration, the ID of the base station 2
Is stored as location information, the location information receiving device 4 is called, and its own terminal number and location information are transmitted.
Here, the mobile terminal 1 periodically transmits the position information to the position information receiving device 4 by monitoring the timer.

When the base station 2 with which the mobile terminal 1 has registered its location is specified, the range of the mobile terminal 1 is limited to the communication area of the base station 2. In particular, in the case of PHS, since the communication area for each base station is small (radius 100 to 300 m),
If the ID of the base station 2 whose location is registered by the mobile terminal 1 is known,
A specific place name corresponding to the communication area can be associated. In this system, the mobile terminal 1
To monitor the position of

Further, the mobile terminal 1 periodically receives a signal from the base station 2 as in the prior art, and stores the base station ID contained therein in the base station ID already stored in the location information storage area. Is determined, and if the stored base station ID is different from the received base station ID, it is determined that the area has been moved, and location registration is performed for the newly received base station 2 to store location information. The base station ID of the area is updated with the new base station ID. Then, as a feature of the present system, when the area changes, the location information receiving device 4 is immediately called to transmit the location information.

When the stored base station ID matches the newly received base station ID, it means that the base station ID remains in the same area, and the position information receiving apparatus is periodically monitored by ordinary timer monitoring. 4 to transmit the position information. The operation of the mobile terminal 1 will be described later in detail.

The position information receiving device 4 has a receiving function as a mobile terminal, communicates with the base station 2 by radio, and receives data from another mobile terminal 1 via the base station 2. Is what you can do. For example, it can be realized by a PHS terminal or the like carried by the boss.

More specifically, the position information receiving device 4 receives a base station ID and a terminal number as position information from each mobile terminal 1, and displays a display device 5 connected to the position information receiving device 4. And a terminal number and location information.

The display device 5 is provided with a position information receiving device 4.
The location information of the mobile terminal 1 transmitted from the location information receiving device 4 is received and stored in the storage unit 51. Further, the location name corresponding to the location information is referred to by referring to the location name file 52. This is read and displayed on the display unit 53 together with the number of the mobile terminal 1. Specifically, it can be realized by a notebook computer, an electronic organizer, or the like.

Here, the storage unit 51 of the display device 5 and the place name file 52 will be described with reference to FIGS.
FIG. 2 is a conceptual explanatory diagram of the storage unit 51 of the display device 5,
FIG. 3 is a conceptual explanatory diagram of the place name file 52. As shown in FIG. 2, the storage unit 1 stores the terminal number of the mobile terminal 1 transmitted from the position information receiving device 4 in association with the base station ID as position information together with the reception time. .

Also, as shown in FIG.
Reference numeral 2 denotes a table for storing base station IDs and corresponding place names. As described above, in the PHS, since the communication area of each base station 2 is small, a quite detailed place name can be made to correspond to the ID of the base station, and the position of the carrier can be displayed clearly. It is.

A display example in the first system will be described with reference to FIG. FIG. 4 is an explanatory diagram showing a display example on the display device 5 of the first system. As shown in FIG. 4, in the first system, the display device 5 uses the location name file 5 based on the information received from the location information receiving device 4.
2, the location name corresponding to the received ID of the base station is read, and the reception time and the number (terminal number) of the mobile terminal 1 are read.
, The base station ID, and the place name read from the place name file 52 are displayed on the display unit 53.

Next, the operation of the first system will be described with reference to FIG.
Briefly described using, for example, the mobile terminal 1a
Since the user is in the area of the base station 2a, the mobile station communicates with the base station 2a to perform position registration, calls the position information receiving device 4, and transmits the base station ID of the base station 2a as position information. The position information transmitted from the mobile terminal 1a is transmitted to the base station 2c connected to the position information receiving device 4 via the public network 3, and transmitted from the base station 2c to the position information receiving device 4.
Then, the position information receiving device 4 receives the number of the mobile terminal 1a and the ID of the base station 2a and sends them to the display device 5. The display device 5 displays the terminal number of the mobile terminal 1a and the ID of the base station 2a. And the corresponding place name are displayed.

As described above, for example, if the boss carries the position information receiving device 4 and the display device 5, the position information is periodically transmitted from the mobile terminal 1 owned by the subordinate, and the boss calls the This makes it easy to find out where subordinates are without having to call them. Also, it is convenient for subordinates, because it is not necessary to make a telephone call each time the location changes and to report.

Next, the operation of each component will be specifically described. First, the operation of the mobile terminal 1 will be described with reference to FIG. FIG. 5 shows a control unit (not shown) of the mobile terminal 1.
It is a flowchart figure which shows operation | movement. As shown in FIG. 5, when the power is turned on, the control unit of the mobile terminal 1 performs location registration with the base station 2 in the area where it is located (100), and stores the ID of the registered base station 2 in location information. It is stored in the area (102).

Then, the control unit of the mobile terminal 1 reads out the telephone number of the location information receiving device 4 stored in advance, makes a call (104), and confirms an incoming call to the location information receiving device 4 (106). ), And reads the ID of the base station 2 from the location information storage area, and transmits the base station ID and its own terminal number as location information to the location information receiving device 4 (10).
8).

Then, the control unit of the mobile terminal 1 starts a timer to transmit the position information to the position information receiving device 4 again after a predetermined time (110), and judges whether or not the time is up (112). When time is up, process 1
Returning to step 04, the position information is transmitted to the position information receiving device 4.

If the time has not elapsed in step 112, the control unit of mobile terminal 1 receives the signal from base station 2, reads the ID, and stores the ID stored in the location information storage area. The ID of the station 2 is compared with the newly received ID to determine whether or not the area has been changed (1).
14) If there is no area change, the process returns to step 112.

When the area is changed in the process 114, the control unit of the mobile terminal 1 stops the timer (1).
16) Then, the process proceeds to the process 100, where the location is registered with the new base station 2. That is, if there is an area change, the mobile terminal 1 automatically transmits the position information to the position information receiving device 4, and the latest position information is always sent to the position information receiving device 4. In this way, the processing in the mobile terminal 1 of the first system is performed.

Next, the operation of the position information receiving device 4 of the first system will be described with reference to FIG. FIG. 6 shows the first
Control unit (not shown) of position information receiving apparatus 4 of the system
It is a flowchart figure which shows the process in. As shown in FIG. 6, the control unit of the position information receiving device 4 determines whether an incoming call request has been received, that is, whether or not a call has been made (20).
0), if an incoming call request is received, an incoming call response is made (2)
02). As a result, the line is connected between the calling mobile terminal 1 and the location information receiving device 4, and a call state is established.

The control unit of the position information receiving device 4
The terminal number and the position information (base station ID) of the mobile terminal 1 included in the incoming call message are received and transmitted to the display device 5 (204). Then, the control unit determines whether or not the call is disconnected (206).
The process returns to 00 and waits for an incoming call from another mobile terminal 1. Thus, the processing in the position information receiving device 4 of the first system is performed.

Next, the operation of the display device 5 of the first system will be described with reference to FIG. FIG. 7 is a flowchart illustrating a process in the control unit (not shown) of the display device 5. As shown in FIG. 7, the control unit of the display device 5 includes:
When the terminal number and the position information (base station ID) are received from the position information receiving device 4 (300), the reception time is read from an internal clock (302), and the reception time, the terminal number,
The position information is stored in the storage unit 51 (304).

Then, the control unit of the display device 5 refers to the place name file 52, reads the place name corresponding to the location information (base station ID) (306), and receives the reception time, the terminal number,
The position information (base station ID) and the place name are displayed on the display unit 53 (308). Thus, the processing in the display device 5 is performed.

According to the first position monitoring system according to the embodiment of the present invention, a position information receiving device 4 having a receiving function as a mobile terminal, connected to the position information receiving device 4, and having a base station ID and Place name file 52 to be associated with place name
The mobile terminal 1 periodically calls the position information receiving device 4 and transmits its own terminal number and the ID of the base station 2 whose position has been registered. 4
Sends the received terminal number and the base station ID to the display device 5, and the display device 5 reads the place name corresponding to the base station ID with reference to the place name file 52, and the terminal number and the terminal And the name of the place to be displayed.
A person carrying the position information receiving device 4 and the display device 5 can call the mobile terminal 1 without asking for his / her location.
The location of the mobile terminals 1 can be known at a glance, and each mobile terminal 1
Can automatically transmit the position to the position information receiving device 4 without reporting it every time the location changes, and this has the effect of improving convenience.

Further, since the location information receiving apparatus 4 does not make a call to the mobile terminal 1, a call charge is not charged, and compared with the conventional method of making a call each time for location confirmation, There is an effect that the running cost of the position information receiving device 4 can be reduced.

Also, the position information is not notified to the position information receiving device 4 periodically, but when the specific key of the input unit (not shown) is pressed, the position information to the position information receiving device 4 is not transmitted. Information may be notified. In this way, when the carrier of the mobile terminal 1 wants to consciously notify the location, the location can be notified to the position information receiving device 4 by a simpler operation than making a call, which is convenient.

Next, a second position monitoring system according to an embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 2 is a system configuration block diagram of a second position monitoring system (second system) according to the embodiment of the present invention.
As shown in FIG. 8, the second system has substantially the same configuration as the first system, but does not have an independent display device, and the position information receiving device 40 includes a storage unit 41 for storing position information. , A location name file 42 for associating a base station ID with a location name, and a display unit 43, and the location information receiving device 40 stores and displays the location information transmitted from the mobile terminal 1. I have.

The storage unit 41 is the same as the storage unit 51 shown in FIG. 2, and the place name file 42 is the same as the place name file 52 shown in FIG. The processing in the mobile terminal 1 is the same as the processing in the mobile terminal 1 in the first system, and the processing in the position information receiving device 40 is the same as the processing in the position information receiving device 4 and the display device 5 in the first system. The same is true.

According to the second system according to the embodiment of the present invention, the position information receiving device 40 includes a storage section 41 for storing position information, a place name file 42 for associating base station IDs with place names, Since the display unit 43 includes the display unit 43 and stores and displays the position information transmitted from the mobile terminal 1 via the base station 2, there is no need to provide a separate display device. Of the mobile terminal 1 can be monitored, and the convenience can be improved.

Next, a third position monitoring system according to the embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 3 is a system configuration block diagram of a third position monitoring system (third system) according to the embodiment of the present invention.
As shown in FIG. 9, the third system is basically a second system.
Is the same as the system of FIG.
It is connected to the public network 3 via a DSU 7 by wire. Therefore, it is convenient to install the position information receiving device 44 in a business office or the like where there is no need to move.

In the third system, the location information receiving device 44 includes a storage unit, a place name file, and a display unit (not shown), and performs the same process as the location information receiving device 40 in the second system. Information is received and displayed.

According to the third system of the embodiment of the present invention, the position information receiving device 44
Is connected to the public network 3 by wire, and the position information storage device 44 includes a storage unit that stores position information, a place name file that associates base station IDs with place names, and a display unit, Since the location information transmitted from the mobile terminal 1 via the base station 2 is stored and displayed, if the location information receiving device 44 is installed in an office or the like where no movement is necessary, In addition, the location of the person carrying each mobile terminal 1 can be monitored, and the convenience can be improved.

Although the system for transmitting and receiving position information via the public network has been described above, the position monitoring system can be realized not only by the public network but also by local communication such as local wireless. An example of a position monitoring system using private communication will be described. FIG. 10 is a system configuration block diagram of a fourth position monitoring system (fourth system) according to the embodiment of the present invention.

As shown in FIG. 10, the fourth system comprises:
Private wireless mobile terminal 1, base station 2, private branch exchange 8
, A position information receiving device 45 and a display device 5. The private branch exchange 8 controls the line of private radio. The position information receiving device 45 has the same receiving function as the private wireless mobile terminal 1, and transmits the received position information to the display device 5. The display device 5 is the same as the display device 5 in the first system.

In the fourth system, the position information transmitted from the mobile terminal 1 is received by the base station 2a, transmitted to the base station 2b via the private branch exchange 8, and transmitted from the base station 2b to the position information receiving device 45. Sent to. Then, similarly to the first system, the position information receiving device 45
Transmits the location information to the display device 5, and the display device 5 displays the terminal number and the place name corresponding to the location information.

According to the fourth position monitoring system according to the embodiment of the present invention, in the private wireless system, a positional information receiving device 45 having a receiving function as a mobile terminal of private wireless and a positional information receiving device 45 are provided. A storage unit for storing location information, and a display device 5 having a place name file for associating the base station ID with the place name, and providing the location information transmitted from the mobile terminal 1 via the private branch exchange 8 to the location information. Since the information is transmitted to the receiving device 45 and the terminal number and the place name are displayed on the display device 5, it is possible to monitor the locations of the plurality of mobile terminals 1 by using local wireless, thereby improving convenience. There is an effect that can be.

Next, a fifth position monitoring system according to the embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 1 is a system configuration block diagram of a fifth position monitoring system (fifth system) according to the embodiment of the present invention. As shown in FIG. 11, the fifth system uses a private wireless system, and stores a storage unit, a place name file,
And a display unit. Then, the position information receiving device 46 receives the position information transmitted from the mobile terminal 1 via the private branch exchange 8 and the base station 2, and displays the terminal number and the place name corresponding to the position information. ing.

According to the fifth position monitoring system of the embodiment of the present invention, the position information receiving device 46 has a receiving function as a mobile terminal for private radio, and stores a storage unit for storing position information, A location name file for associating the station ID with the location name, and a display unit, and stores location information transmitted from the mobile terminal 1 via the base station 2 and the private branch exchange 8,
Since the terminal number and the place name are displayed, the location information receiving device 46 can monitor the locations of the plurality of mobile terminals 1 by using the local wireless system, thereby improving the convenience. is there.

[0048]

According to the first aspect of the present invention, a mobile terminal transmits its own terminal number and the ID of a base station whose location has been registered to a receiving device periodically or by a specific operation to receive the mobile terminal. Since the apparatus is a position monitoring system that displays the received terminal number and the place name corresponding to the ID of the base station, the position of each mobile terminal can be displayed by the place name on the receiving apparatus, and the owner of the receiving apparatus Can easily determine the location of multiple mobile devices,
This eliminates the need to make a call and report each time the location changes, thereby improving convenience.

According to the second aspect of the present invention, the mobile terminal calls the location information receiving device periodically or by a specific operation, and via the public network, the terminal number and the location of the area in which the mobile terminal is located. The ID of the base station is transmitted, and the position information receiving apparatus
The position monitoring system transmits the received terminal number and the ID of the base station to the display device, and the display device displays a location number corresponding to the terminal number and the ID of the base station. , The location of each mobile terminal can be easily known via the public network, and the mobile terminal carrier does not have to call and report each time his location changes, improving convenience. There is an effect that can be made.

According to the third aspect of the present invention, the mobile terminal calls the position information receiving apparatus periodically or by a specific operation, and the terminal number and the area where the mobile terminal is located are transmitted via the private network. The position information receiving device sends the received terminal number and the base station ID to the display device, and the display device displays the terminal number and the location name corresponding to the base station ID. Since it is a position monitoring system, if it has a position information receiving device and a display device, it is possible to easily know the position of each mobile terminal via a private communication network. This eliminates the need to call and report each time it changes, thereby improving convenience.

[Brief description of the drawings]

FIG. 1 is a system configuration block diagram of a first position monitoring system (first system) according to an embodiment of the present invention.

FIG. 2 is a conceptual explanatory diagram of a storage unit 51 of the display device 5.

FIG. 3 is a conceptual explanatory diagram of a place name file 52;

FIG. 4 is an explanatory diagram showing a display example on a display unit 5 of the first system.

FIG. 5 is a flowchart illustrating a process in a control unit of the mobile terminal 1.

FIG. 6 is a flowchart illustrating a process in a control unit of the position information receiving device 4 of the first system.

FIG. 7 is a flowchart illustrating a process in a control unit of the display device 5;

FIG. 8 is a system configuration block diagram of a second position monitoring system (second system) according to the embodiment of the present invention.

FIG. 9 is a system configuration block diagram of a third position monitoring system (third system) according to the embodiment of the present invention.

FIG. 10 is a system configuration block diagram of a fourth position monitoring system (fourth system) according to the embodiment of the present invention.

FIG. 11 is a system configuration block diagram of a fifth position monitoring system (fifth system) according to the embodiment of the present invention.

FIG. 12 is a system configuration block diagram of a conventional PHS system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mobile terminal, 2 ... Base station, 3 ... Public network, 4 ... Location information receiving device, 5 ... Display device, 6 ... Location registration device, 7 ... DSU, 8 ... Private branch exchange, 40, 44,
45, 46: Position information receiving device, 41, 51: Storage unit, 42, 52: Place name file, 53: Display unit

Claims (3)

[Claims] 1. A terminal number and an ID of a base station whose location has been registered.
And, a mobile terminal that transmits periodically or by a specific operation via a public network, receives the terminal number and the ID transmitted from the mobile terminal, converts the ID into a place name, A position monitoring system comprising: a receiving device that displays a terminal number and the place name. 2. A plurality of base stations connected via a public network, a mobile terminal moving within a communication area covered by the base station and registering a position with the base station, and the mobile terminal moving through the public network. A position information receiving device that receives data transmitted from the terminal, and a display device that displays data transmitted from the position information receiving device, wherein the mobile terminal periodically or by a specific operation, the position information A mobile terminal that sends a call to a receiving device and transmits the ID of the base station whose location has been registered and its own terminal number to the location information receiving device, wherein the location information receiving device is transmitted from the mobile terminal. A position information receiving device that receives a terminal number and an ID of a base station and transmits the received information to the display device, wherein the display device includes a place name file storing a plurality of sets corresponding to the base station ID and the place name. ,Before When the terminal number and the base station ID are received from the location information receiving device, the place name corresponding to the base station ID is specified by referring to the place name file, and the terminal number and the place name are displayed. A position monitoring system comprising: 3. A plurality of base stations connected via a local area network, a mobile terminal moving within a communication area covered by the base station and registering a position with the base station, and a mobile terminal via the local area network. A position information receiving device that receives data transmitted from the mobile terminal, and a display device that displays data transmitted from the position information receiving device, wherein the mobile terminal periodically or by a specific operation A mobile terminal for calling the location information receiving apparatus and transmitting the ID of the base station whose location has been registered and its own terminal number to the location information receiving apparatus, wherein the location information receiving apparatus transmits from the mobile terminal; A location information receiving apparatus for receiving the terminal number and the ID of the base station, and transmitting the received terminal number and the ID of the base station to the display device, wherein the display device stores a plurality of sets corresponding to the ID of the base station and the place name. To When the terminal number and the base station ID are received from the position information receiving device, the place name corresponding to the base station ID is specified with reference to the place name file, and the terminal number and the place name are identified. A position monitoring system characterized by being a display device for displaying a position.