JPH1094034A - Position monitoring system - Google Patents

Abstract

(57) [Summary] [Problem] In a conventional PHS system, it is inconvenient for a user to make a telephone call to know the location of a partner, which is inconvenient. Provided is a position monitoring system capable of intensively monitoring and displaying the position information of a plurality of mobile terminals without applying the same. SOLUTION: A mobile terminal 1 is provided with a position information receiving device 4 having a function of receiving from a public network, and a display device 5 connected to the position information receiving device 4 and provided for converting a place name code into a place name and displaying the place name code. However, when the specific key is pressed, a call is made to the location information receiving device 4 to transmit its own terminal number and the inputted place name code, and the location information receiving device 4 And sends the place name code to the display device 5,
The display device 5 is a position monitoring system that displays a terminal number and a place name where the terminal is located.

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, in a position monitoring system, when a specific key is depressed, a terminal number and a place name code are made public. A mobile terminal transmitting via a network, receiving the terminal number and the place name code transmitted from the mobile terminal, converting the place name code into a place name, and displaying the terminal number and the place name The receiver is characterized by displaying each mobile terminal and the place name where the mobile terminal is located on the receiving device, so that the owner of the receiving device can easily know the positions of the plurality of mobile terminals. In addition, the user of the mobile terminal can be notified of the location only by a simple registration operation, and the convenience can be improved.

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. The mobile terminal that moves and performs communication via the base station, a position information receiving device that receives data transmitted from the mobile terminal via the public network, and data transmitted from the position information receiving device. Display device for displaying, when the specific key is pressed, the mobile terminal stores the subsequently input place name code, calls the location information receiving apparatus, and stores the place name code and its own A mobile terminal for transmitting a terminal number to the position information receiving device, wherein the position information receiving device receives the terminal number and the place name code transmitted from the mobile terminal and transmits the terminal number and the location name code to the display device; A receiving device, said display device,
A place name file storing a plurality of sets corresponding to place name codes and place names is provided.When a terminal number and a place name code are received from the position information receiving device, the place name file is referred to and the place name code is corresponded. It is characterized by being a display device that specifies a place name to be displayed and displays the terminal number and the place name, and if a position information receiving device and a display device are provided, the position of each mobile terminal can be determined via a public network. Can be easily known, and the person carrying the mobile terminal can be notified of the location only by a simple registration operation, and the convenience can be improved.

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. Mobile terminal that performs communication through the base station, a position information receiving device that receives data transmitted from the mobile terminal via the private network, and a mobile terminal that transmits data from the position information receiving device. A display device for displaying data, wherein the mobile terminal, when a specific key is pressed, stores the subsequently input place name code, calls the location information receiving apparatus, and A mobile terminal that transmits its own terminal number to the position information receiving device, wherein the position information receiving device receives the terminal number and the place name code transmitted from the mobile terminal, and transmits the terminal number and the place name code to the display device. A position information receiving device, wherein the display device includes a place name file storing a plurality of sets corresponding to place name codes and place names, and when the terminal information and the place name code are received from the position information receiving device, It is a display device that specifies the place name corresponding to the place name code with reference to the place name file and displays the terminal number and the place name, and may include a position information receiving device and a display device. If this is the case, the location of each mobile terminal can be easily known via the local communication network, and the mobile terminal carrier can be notified of the location only by a simple registration operation, thereby improving convenience. Can be.

[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.

The mobile terminal 1 includes a place name file 12 including a plurality of place names, and a position information storage area for storing position information registered by the carrier, and further stores a telephone number of the position information receiving device 4 in advance. I remember. Also, a key (not shown) for inputting a position information registration / notification instruction for specifying position information registration and notification to the position information receiving device 4 is assigned to the key input unit 11.

The mobile terminal 1 displays a list of place names based on the place name file 12 when a position information registration / notification instruction is input from the key input unit 11, so that the carrier can view the list. Is stored in the location information storage area as location information, the telephone number of the location information receiving device 4 is read out, the location information receiving device 4 is called, and its own terminal number and location information are stored. This is transmitted to the position information receiving device 4. Note that the location information is transmitted by using a calling subaddress information element or a called subaddress information element in a call setup message from the mobile terminal 1.

Thus, when the location of the mobile terminal 1 is changed, the user of the mobile terminal 1 inputs the location information registration / notification instruction and registers the place name code, and the mobile terminal 1 automatically receives the location information. Automatically notifies the user of his / her location, which is convenient because the carrier does not need to make a phone call to notify his / her location.

As a method of inputting location information in the mobile terminal 1, in addition to a code input for inputting a place name code based on a list of place names, a user can input an arbitrary place name from a key input unit into kana, alphabet, or the like. There is a character input to enter with the character. In this case, a character code is transmitted as position information using a table of mutual conversion between characters and character codes provided in a normal mobile terminal. And
The user registers the location information by inputting a place name code or a character. 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. Can be received. For example, it can be realized by a PHS terminal or the like carried by the boss.

Specifically, the position information receiving device 4 receives the position information and the terminal number from each mobile terminal 1, and displays the terminal number and the information on the display device 5 connected to the position information receiving device 4. , And location information.

The display device 5 is provided with a position information receiving device 4.
And receives the location information of the mobile terminal 1 transmitted from the location information receiving device 4, stores it in the storage unit 51, refers to the place name file 52, and finds the terminal number and the location of the mobile terminal. The place name is displayed on the display unit 53. In addition, a table for mutually converting between character codes and characters corresponding to the mobile terminal 1 is provided.

Here, the storage unit 51 of the display device 5 will be described with reference to FIG. FIG. 2 is a conceptual explanatory diagram of the storage unit 51. As shown in FIG. 2, the storage unit 51 stores the terminal number of the mobile terminal 1 transmitted from the position information receiving device 4 and the position information in association with the reception time. Since the location information includes a place name code and a character code, the type of the code and the data are stored.

Next, the place name file 52 will be described with reference to FIG. FIG. 3 is a conceptual explanatory diagram of the place name file 52. As shown in FIG. 3, the place name file 52 is a table that stores place name codes and corresponding place names. The place name file 52 is similar to the place name file 12 provided in the mobile terminal 1, and the same place name code corresponds to the same place name.

Next, 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 refers to the place name file 52 based on the information received from the position information receiving device 4, and receives the reception time and the number of the mobile terminal 1 (terminal The display unit 53 displays the location number corresponding to the location information (place name code or character code).

Next, the operation of the position notification in the first system will be briefly described with reference to FIG. Mobile terminal 1
Is located in the area of the base station 2a, and when a position information registration / notification instruction is input from the key input unit 11, a call is made to the position information receiving apparatus 4 via the base station 2a, and The location name code (or character code) and the terminal number registered in the location information storage area are transmitted.

The location information transmitted from the mobile terminal 1a is:
The information is transmitted to the base station 2b to which the position information receiving device 4 is connected via the public network 3, and is transmitted from the base station 2b to the position information receiving device 4. Then, the position information receiving device 4 receives the terminal number of the mobile terminal 1a and the position information and transmits them to the display device 5, and the display device 5 displays the terminal number of the mobile terminal 1a and the place name corresponding to the position information. Is displayed.

Therefore, 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 makes a call. Without having to do so, you can easily find out where your subordinates are.

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 a position information registration / notification instruction is input from key input unit 11 (100), the control unit of mobile terminal 1 determines whether the input method is character input or place name code input (102). In the case of character input, a character input screen is displayed (110), the input character code is read (112), and the character code is stored as position information in the position information storage area (1).
14).

If the input method is the place name code input in the process 102, the control unit of the mobile terminal 1 displays a place name list (selection menu) based on the place name file 12 (120). Then, it is determined whether or not an instruction for confirmation has been input (122). If the confirmation has been input, the place name code of the confirmed place name is stored as position information in the position information storage area (124).

Then, the control unit of the mobile terminal 1 reads out the telephone number of the position information receiving device 4, calls the position information receiving device 4 (130), and confirms the incoming call to the position information receiving device 4. (132), and transmits its own terminal number and position information to the position information receiving device 4 (134). In this way, the processing in the mobile terminal 1 of the first system is performed.

In the mobile terminal 1 of the present system, the notification of the position information is performed in accordance with the registration of the position information according to the instruction of the carrier, but the registration and the notification are made independent.
Notification of the position information may be periodically performed by timer monitoring.

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 location information (place name code or character code) 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 has been disconnected (206). If the call has been disconnected, the process returns to step 200 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 (place name code or character code) are received from the position information receiving device 4 (300), the reception time is read from the internal clock (302), and the reception time, the terminal number, and the position information are read. Are stored in the storage unit 51 (304).

Then, the control unit of the display device 5 determines whether the position information is a place name code or a character code (3).
06) If it is a place name code, the place name corresponding to the place name code is read by referring to the place name file 52 (30).
8). Then, the control unit displays the reception time, the terminal number, and the place name on the display unit 53 (312).

If it is determined in step 306 that the positional information is a character code, the control unit of the display device 5 converts the character code into a character (310), and proceeds to step 312. 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, and a place name code and a place name A place name file 52 that associates
Is provided, and when the mobile terminal 1 receives a position information registration / notification instruction from the key input unit 11,
The registered place name code is stored as position information, a call is made to the position information receiving device 4 to transmit its own terminal number and position information, and the position information receiving device 4 receives the received terminal number and the position information. Is transmitted to the display device 5, and the display device 5
By reading the place name corresponding to the place name code as the position information with reference to the place name file 52 and displaying the terminal number and the place name where the terminal is located, the position information receiving device 4 and the display device 5 are displayed. The person carrying the mobile terminal 1 can know the location of the mobile terminal 1 at a glance without having to call the mobile terminal 1 himself and ask for the location. If performed, the position can be automatically notified to the position information receiving device 4 later, and there is an effect that convenience can be improved.

The position information receiving device 4 and the mobile terminal 1
Has a table that converts character codes and characters to and from each other, so you can register location information by character input, and you can use different registration methods according to user preferences,
There is an effect that usability can be improved.

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.

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 place name file 42 for associating the place name code with the place name, and a display unit 43, and the position information receiving device 40 stores and displays the position information transmitted from the mobile terminal 1. .

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 apparatus 40 includes: a storage section 41 for storing position information; a place name file 42 for associating place name codes with place names; And a storage unit 43 for storing and displaying the position information transmitted from the mobile terminal 1 via the base station 2, so that the same effect as in the first system is obtained. There is no need to provide this, and the location information receiving device 40 can monitor the locations of the plurality of mobile terminals 1, which has the effect of improving convenience.

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 position information receiving device 44 includes a storage unit, a place name file, and a display unit (not shown), and performs the same processing as the position 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 location information storage device 44 includes a storage unit that stores location information, a place name file that associates place name codes with place names, and a display unit. Since the location information transmitted from the terminal 1 via the base station 2 is stored and displayed, the same effect as in the first system can be obtained. If the receiving device 44 is installed, the location of the person carrying each mobile terminal 1 can be monitored at a business office or the like, 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 private wireless terminal and a positional information receiving device 45 are provided. A storage unit is connected and stores location information, and a display device 5 having a place name file for associating place name codes and place names is provided. The location information transmitted from the mobile terminal 1 is received via the private branch exchange 8. Since the terminal number and the place name are transmitted to the device 45 and 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 the position information, A location name file for associating the code with the location name, and a display unit, storing 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.

[0049]

According to the first aspect of the present invention, when the specific key is pressed, the mobile terminal transmits its own terminal number and the place name code to the receiving device, and the receiving device receives the data. Since the position monitoring system displays the terminal number and the place name corresponding to the place name code, the position of each mobile terminal can be displayed by the place name in the receiving device. The position can be easily known, and the person carrying the mobile terminal can be notified of the location only by a simple registration operation, thereby improving the convenience.

According to the second aspect of the present invention, when the specific key is depressed, the mobile terminal calls the location information receiving device, and transmits the terminal number and the inputted place name code via the public network. The position information receiving device transmits the received terminal number and the place name code to the display device, and the display device displays the terminal number and the place name corresponding to the place name code. And display device, the location of each mobile terminal can be easily known via a public network, and the mobile terminal carrier can notify the location only by a simple registration operation, There is an effect that convenience can be improved.

According to the third aspect of the present invention, when the specific key is pressed, the mobile terminal calls the location information receiving device, and the terminal number and the input place name code via the local area network. The position information receiving device transmits the received terminal number and the place name code to the display device, and the display device displays the terminal number and the place name corresponding to the place name code. If the device and the display device are provided, it is possible to easily know the position of each mobile terminal via the private communication network,
The location can be notified only by a simple registration operation, and the convenience can be improved.

[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 of the display device 5;

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

FIG. 5 is a flowchart illustrating an operation of 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] A mobile terminal that transmits a terminal number and a place name code via a public network when a specific key is pressed;
A receiving device that receives the terminal number and the place name code transmitted from the mobile terminal, converts the place name code into a place name, and displays the terminal number and the place name. Position monitoring system. 2. A plurality of base stations connected via a public network, a mobile terminal that moves within a communication area covered by the base station and performs communication via the base station, and a mobile terminal connected via the public 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, when a specific key is pressed, A mobile terminal that stores the input place name code, calls the position information receiving apparatus, and transmits the place name code and its own terminal number to the position information receiving apparatus; Is a position information receiving device that receives the terminal number and the place name code transmitted from the mobile terminal and transmits the same to the display device, wherein the display device stores a plurality of sets in which the place name code and the place name are associated with each other. did When a terminal name and a place name code are received from the location information receiving device, the place number corresponding to the place name code is specified by referring to the place name file, and the terminal number and the place name are determined. A position monitoring system, which is a display device for displaying. 3. A plurality of base stations connected via a private communication network, and moving within a communication area covered by the base stations,
A mobile terminal that communicates through the base station, a position information receiving device that receives data transmitted from the mobile terminal through the private network, and data that is transmitted from the position information receiving device. A display device, wherein the mobile terminal, when a specific key is pressed, stores the subsequently input place name code, calls the location information receiving apparatus, and the place name code and its own terminal number A mobile terminal that transmits the location information receiving device to the location information receiving device, wherein the location information receiving device receives the terminal number and the place name code transmitted from the mobile terminal and transmits the location information receiving device to the display device. The display device includes a place name file storing a plurality of sets in which a place name code and a place name are associated with each other, and when a terminal number and a place name code are received from the position information receiving apparatus, A position monitoring system comprising: a display device that specifies a place name corresponding to the place name code with reference to a name file and displays the terminal number and the place name.