JP3274153B2 - Mobile communication system - Google Patents

Abstract

PURPOSE:To allow the system to recognize a current position of the user carrying a mobile body communication terminal by allowing the mobile body communication terminal itself to access a nearby base station for each prescribed time and allowing a center station to monitor identification information from the accessed base station. CONSTITUTION:The system is provided with a center station 70 storing plural position data corresponding to each identification information and each mobile body communication terminal 20 is provided with an access means accessing plural base stations 10 for each prescribed time. Then the base station 10 replying an access from the mobile body communication terminal 20 among the plural base stations 10 sends the identification information of the base station 10 to the center station 70, which retrieves relevant position data among the plural stored position data based on the identification information sent from the base station 10 replying the access from the mobile body communication terminal 20. The access for each prescribed time is implemented for a prescribed time or an indefinite time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system such as a so-called portable telephone.

[0002]

2. Description of the Related Art Conventionally, as a mobile communication system, for example, a mobile communication terminal such as a so-called portable telephone accesses a plurality of base stations each having individual identification information. There is a system in which communication by the mobile communication terminal is performed via the base station using the identification information from the responding base station.

Further, in such a mobile communication system, a so-called CT-2 (Second generation cordless transmission) using an LID (Link Reference ID) as the identification information is provided.
elephon). Here, the specification in the CT-2 standard is a so-called ETSI (European Telecommun
Communication Standard Institute) CAI (Common
Air Interface standard).

Further, for example, the so-called telepoint in the CT-2 is a base unit of a cordless telephone for public use, that is, the base station (CFP: Cordless Fixed Part,
Within about 100 m around the master station, a cordless telephone slave unit that satisfies the above-mentioned CAI specification and is registered with a domestic line operator, that is, a mobile communication terminal (CPP:
This is a system that allows a person having a cordless portable part (mobile device) to connect to a so-called PSTN line via the base station.

Here, the LID (Link Reference ID)
Is a number individually indicating the base station (CFP). The LID includes a link reference (Link Reference).
rence) and BID (Base ID), which are numbers uniquely assigned to each base station of the telepoint.

[0006] The mobile station (CPP) issues a link request (Link Request) when performing a telepoint access. This link request includes a PID (Personal ID) which is a unique number of the mobile device.
The PID is the HID (Han Han) of the CT-2 standard.
dset Identification Code) and MID (Manufacturer Identification Code).

[0007] Upon receiving the link request, the base station (CFP) returns a link grant. The link grant includes the above-mentioned LID, and the LID in this case is the above-mentioned link reference which is a number indicating each base station (CFP).

[0008] The above-mentioned mobile devices are usually carried individually by a person using the mobile devices when going out or the like.

[0009]

By the way, for example, in a company or the like, when an employee who frequently goes out, for example, a so-called outside salesman, etc., he / she may be notified of the current position. In this case, conventionally, for example, a calling device that emits a ringing tone, displays a call, or vibrates in response to a calling signal from a service center is provided to each employee who is out. The person called by the ringing tone contacts the company by telephone or the like. Further, for example, there is a case where an employee who is out of the office reports the current position or the like at regular intervals.

[0010] However, as described above, when an employee calling by a calling device or going out contacts the company by himself, the call cannot be made unless there is a telephone nearby. Contacting the current position is not preferable from the viewpoint of work efficiency and the like.

[0011] Further, the mobile device of the above-mentioned mobile communication system is given to each of the employees who frequently go out,
For example, a method of contacting the current position at regular time intervals is conceivable, but also in this case, it is not preferable from the viewpoint of work efficiency and the like to always contact the current position as described above.

As a system for performing positioning for knowing the current position, for example, there are positioning-only systems such as so-called Loran C, Omega, NNSS, and GPS. However, these devices require a dedicated receiver to determine their location, thus reducing cost,
It requires special space and is usually not suitable for carrying around.

Accordingly, the present invention has been proposed in view of the above-described situation, and it is possible to know the current position of a user who carries a mobile communication terminal, and to notify the user of the current position by using the current position. It is an object of the present invention to provide a mobile communication system that does not hinder a person's actions.

[0014]

SUMMARY OF THE INVENTION A mobile communication system according to the present invention has been proposed in order to achieve the above-mentioned object, and a mobile communication terminal is provided with a plurality of base stations each having individual identification information. Access to the mobile communication system using the identification information from the base station responding to the access, and performing communication by the mobile communication terminal via the base station. A mobile station monitoring station for storing a plurality of corresponding position data is provided, the mobile communication terminal has access means for accessing the plurality of base stations at predetermined time intervals, and the mobile communication terminal is connected to the base station. As a result of comparing the currently acquired base station identification information obtained by accessing to the previously acquired base station identification information obtained at the time of the previous access, If the previously obtained base station identification information is not the same, the mobile terminal transmits the current acquisition base station identification information and the own station number to the mobile station monitoring station via the base station. The mobile station monitoring station transmits to the mobile station monitoring station, and the mobile station monitoring station transmits the plurality of pieces of position data based on the base station identification information of the base station acquired this time transmitted from the mobile communication terminal. From the corresponding position data.

Here, the access performed by the mobile communication terminal at the predetermined time intervals may be, for example, a fixed time or an irregular time. The irregular time includes, for example, a case where the user of the mobile communication terminal accesses the terminal by himself / herself.

[0016]

According to the present invention, the mobile communication terminal accesses the nearest base station at predetermined time intervals, and transmits identification information from the accessed base station to the mobile station monitoring station. Since the mobile monitoring station monitors, and from which of the plurality of base stations the identification information has been sent, the mobile station monitoring station searches from among the plurality of position data stored in the mobile monitoring station, The current position of the user of the mobile communication terminal can be known.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the mobile communication system of the present invention includes a mobile communication terminal (mobile unit or slave unit: CPP) 20 (for example, mobile units 20 _l , 20 _m , 2).
From 0 _n), each plurality of base stations having individual identification information (link Reference ID) (base unit: CFP) access (call) to the 10 (e.g., base station 10 _l, 10 _m, 10 _n) Using the identification information from the base station 10 responding to this access, the mobile station 2
0 is a mobile communication system that performs communication by using a mobile communication system.

Here, the mobile unit 20 corresponds to a so-called cordless telephone slave unit, and the base station 10 corresponds to a public base unit of the cordless telephone. In this embodiment, the CT-2 (Second generation cordles described above) is used.
This is an example of applying the standard of s telephone). Therefore,
In this embodiment, a call can be made to a subscriber such as the PSTN network 50 using the so-called telepoint function of the CT-2. That is, when a person having a cordless telephone handset, that is, a mobile station (CPP) 20 makes a telepoint call according to the protocol specified in the ETSI, the base station (telepoint CFP) receiving the call transmits the identification information. (Link reference ID) is returned to the mobile station (CPP) 20. Needless to say, the present invention is not limited to the CT-2 standard as long as each of the plurality of base stations has individual identification information and performs communication using this identification information. Other things may be used.

Further, in the mobile communication system according to the embodiment of the present invention, a plurality of position data respectively corresponding to the respective identification information (link reference IDs) of the plurality of base stations 10 are stored. By access,
The LID transmitted from the mobile device 20 corresponds to the link reference ID transmitted from the plurality of position data based on the link reference ID in the signal transmitted via the base station 10. Mobile station monitoring station 7 as a center station for searching position data
0, and the mobile device 20 has access means for accessing the plurality of base stations 10 at predetermined time intervals, and has responded to access from the mobile device 20 among the plurality of base stations 10. The base station 10 transmits the link reference ID of the base station 10 transmitted from the mobile station 20 to the mobile station monitoring station 70, and the mobile station monitoring station 70 responds to the access from the mobile station 20. Link reference ID from base station 10
, The corresponding position data is searched from the plurality of stored position data.

That is, in FIG. 1, each base station 1
0 (10 _l , 10 _m , 10 _n ) is, for example, an area of about 100 m radius (cover area CE) from each base station.
It is capable of wirelessly transmitting and receiving to and from the mobile device 20 existing in the base station, and each base station 10 _l , 10 _m , 10 _n
Are connected to the PSTN network 50, respectively. This P
The STN network 50 is connected to the mobile station monitoring station 70.

As described above, the mobile station monitoring station 70 stores a plurality of pieces of position data respectively corresponding to the respective identification information of the plurality of base stations 10, and accesses the mobile station 20 by accessing the mobile station 20. From the plurality of position data based on the link reference ID in the signal transmitted via the base station 10 for the LID transmitted from the base station 10 and searches for the position data corresponding to the transmitted link reference ID. And a position search unit 71 for performing the search.

The location search unit 71 includes, for example, a map record database that stores map data as location data for each peripheral area where the base stations 10 are installed, and a base station that responds to the access of the mobile device 20. A map data search unit for searching the map data stored in the map record database for corresponding map data based on the link reference ID from the station 10.

Here, as the above-mentioned surrounding area, for example,
It can be an area within the cover area CE (CE _l , CE _m , CE _n ) with a radius of about 100 m around the base unit of the public cordless telephone, that is, the base station (CFP) 10. Therefore, the map record database includes, for example, the link reference I of the base station 10 _l.
A map data corresponding to the D _l, the map data corresponding to the link reference ID _m of the base station 10 _m, the base station 10
As the map data corresponding to _n links Reference ID _n, a plurality of map data corresponding to each link reference ID _l ~ID _n of the plurality of base stations 10 _l to 10 _n are stored. In this map record database, it is possible to store map data of a wider range than the above-mentioned cover area CE for each link reference ID of each base station 10, and to specify by map data. The ranges to be overlapped may overlap.

The mobile station monitoring station 70 is also provided with a display section 72 for displaying the position data (map data) from the position search section 71. That is, position data (map data) based on the link reference ID of the base station 10 in response to the access from the mobile device 20 is displayed on the display unit 72, so that the current user of the mobile device 20 is displayed. Position (Cover Area CE)
Can be known by the mobile device monitoring station 70.

The specific configuration of the mobile station monitoring station 70 will be described later.

FIG. 2 is a block diagram showing a detailed configuration of the mobile device 20. The mobile device 20 corresponds to a so-called cordless telephone slave unit. In FIG. 2, a configuration surrounded by a dotted line in FIG. 2 shows a configuration of a normal cordless telephone slave unit (mobile unit: CPP) 21. . That is, the mobile device 20 includes a microphone 30 and a speaker 31 for transmitting and receiving, a receiving circuit 25 for receiving a signal, a transmitting circuit 26 for transmitting a signal, and an input key such as a dial. An input unit 29, a microcomputer 27 for controlling each unit, a program ROM 28 of the microcomputer 27, and an antenna 2 for transmitting and receiving signals.
And 4.

The mobile device 20 according to the embodiment of the present invention includes:
As described above, the timer 41 for setting an access time for performing access to the base station 10 at predetermined time intervals is provided. The timer 41 and the microcomputer 27 constitute an access means. That is, the microcomputer 27 of the mobile device 20 according to the present embodiment calls the base station 10 based on the time information from the timer 41. Note that the access may be performed at irregular times, for example, when the user of the mobile device 20 accesses the device by himself / herself.

FIG. 3 shows a flowchart of the processing in the mobile device 20 of the present embodiment.

That is, in this flowchart,
In step S21, it is determined whether or not the count of the timer 41 has been completed (whether or not the set access time has been reached).
When the counting is not completed (when the access time is not reached (No)), the process returns to the start. When the counting is completed (when the access time is reached (Yes)), the process proceeds to step S22. .

In step S22, the above-described access for transmitting a link request to the base station (telepoint CFP) 10 is performed. After step S22, in step S23, it is determined whether a link grant has been returned from the base station 10 within a certain period of time, for example. When the link grant is not received (N
o) The process proceeds to step S29 described below, and if a link grant has been received (Yes), the process proceeds to step S24.

In step S24, a link reference ID is extracted from the link grant sent from the base station 10, and the process proceeds to step S25. Step S
In 25, the extracted link reference ID is
It is determined whether the link reference ID obtained by the previous access is the same as the current link reference ID. If the previous link reference ID is equal to the current link reference ID (Yes), the process proceeds to step S29, and if not (No), the process proceeds to step S26. That is, in this step S25, the case where the previous link reference ID is not equal to the current link reference ID means that
Indicates that the mobile terminal has moved from the coverage area CE of the base station 10 identified by the previous link reference ID to the coverage area CE of the base station 10 identified by the current link reference ID.

In step S26, the telephone number of the mobile station monitoring station 70 is dialed to the base station 10. That is, if the user of the mobile device 20 has moved in step S25, the current position of the mobile device 20 (the current position of the user) after the movement is determined by the mobile device monitoring station 70. , The mobile device 20 dials the mobile device monitoring station 70 via the base station 10.

In step S27, the above-mentioned step S26
It is determined whether or not the dialing to the mobile station monitoring station 70 has been connected. If not connected to the mobile station monitoring station 70 (No), step S29
If the connection has been established (Yes), the process proceeds to step S28.

In step S28, the mobile station (CP
P) 20 to the mobile station monitoring station 70,
The link reference ID thus extracted and the PID (personal ID), which is the own station number, are sent, and step S29 is performed.
Proceed to.

In step S29, since the transmission of the extracted link reference ID, which is information indicating the current position, to the mobile station monitoring station 70 has been completed, the base station 10 is requested to disconnect the line.

Thereafter, in step S30, the timer 41 is reset, and the process returns to step S21 again to perform the above-described processing.

Note that the microcomputer 27 performs each determination process in this flowchart.

FIG. 4 is a block diagram showing a detailed configuration of the mobile station monitoring station 70. In FIG. 4, the mobile station monitoring station 70 controls a map record database 80 composed of, for example, a magnetic disk or a large-capacity memory as the position search unit 71, and outputs map data from the map record database 80. A computer 81 to be searched, a ROM 82 for storing programs of the computer 81, a communication interface 83 for performing communication, and a so-called NCU (network
The mobile station monitoring station 70 is connected to the base station 10 through the PSTN network 50. The control unit 84 includes a graphic display unit 85 as the display unit 72. As the graphic display unit 85, for example, a so-called television CRT or a dot matrix LCD (liquid crystal display) capable of performing graphics display is used.

FIG. 5 shows a flowchart of the current position monitoring process of the mobile device 20 in the mobile device monitoring station 70.

That is, in this flowchart, the dialing (call) from the mobile station 20 is performed in step S41, and the link reference I of the base station 10 is transmitted from the mobile station 20 in step S42.
D and the personal ID of the mobile device 20 are received,
Proceed to step S43.

In step S43, the computer 81 searches the map record database 80 for position data (map data) corresponding to the link reference ID.

When the position data is retrieved in step S43, the position data is stored in the graphic display unit 85.
Is displayed on the display screen of the display unit 85 to indicate that the mobile device 20 is at the searched position (step S44).

In step S45, the above-mentioned step S44
The position data searched in and the number of the mobile device 20 are recorded, and the line is disconnected in step S46. Thereafter, in step S47, a call from the mobile device 20 is waited.

As described above, according to the mobile communication system of the present embodiment, a plurality of position data respectively corresponding to the respective link reference IDs of the plurality of base stations 10 are stored and transmitted from each base station 10. A mobile station monitoring station 70 is provided for searching for the location data corresponding to the transmitted link reference ID from the plurality of location data based on the transmitted link reference ID. Having access means for accessing the plurality of base stations 10 at predetermined time intervals,
The base station 10 that has responded to the access from the mobile station 20 among the plurality of base stations 10 transmits the link reference ID of the base station 10 to the mobile station monitoring station 70, and the mobile station monitoring station 70 Is configured to search for the corresponding location data from the stored plurality of location data based on the link reference ID from the base station 10 in response to the access from the mobile station 20. The user can always know the current position of the user who carries the device 20 and the communication of the current position does not hinder the user's actions. The mobile device 20 of the present embodiment is different from the conventional mobile device in that
, And can be realized only by a small change in the program, so that the configuration is inexpensive and the configuration does not become large.

[0045]

As described above, in the mobile communication system according to the present invention, the mobile communication terminal accesses a plurality of base stations each having individual identification information, and the base station responding to the access accesses the base station. In a mobile communication system that performs communication by the mobile communication terminal via the base station using the identification information of the mobile station, a mobile station monitoring unit that stores a plurality of position data respectively corresponding to the identification information of the plurality of base stations. Station, the mobile communication terminal has access means for accessing the plurality of base stations every predetermined time, and the mobile communication terminal obtains the base station identification information acquired this time by accessing the base station. As a result of comparison with the previously obtained base station identification information obtained at the time of the previous access, the current obtained base station identification information and the previously obtained base station identification information are not the same. In this case, the mobile terminal transmits the currently acquired base station identification information and the own station number to the mobile station monitoring station via the base station when transmitting to the mobile station monitoring station, The mobile device monitoring station searches for the corresponding position data from the stored plurality of position data based on the base station identification information obtained at this time of the base station transmitted from the mobile communication terminal. Therefore, the mobile station monitoring station can know the current position of the user carrying the mobile communication terminal, and the mobile communication terminal does not need to be notified of the current position, and does not hinder the action.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a mobile communication system according to an embodiment.

FIG. 2 is a block diagram illustrating a configuration of a mobile communication terminal according to an embodiment.

FIG. 3 is a flowchart of a process in a mobile communication terminal.

FIG. 4 is a block diagram illustrating a configuration of a mobile station monitoring station according to the embodiment.

FIG. 5 is a flowchart of a process in a mobile station monitoring station.

[Explanation of symbols]

 10 base station 20 mobile unit 50 PSTN network 70 mobile unit monitoring station 71 location search unit 72 ······ Display area CE ····· Cover area

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/26 H04Q 7/34

Claims (1)

(57) [Claims] A mobile communication terminal accesses a plurality of base stations each having individual identification information, and uses the identification information from the base station in response to the access, and uses the mobile station via the base station. In a mobile communication system that performs communication by a communication terminal, a mobile device monitoring station that stores a plurality of position data respectively corresponding to the respective identification information of the plurality of base stations is provided, and the mobile communication terminal performs the An access unit for accessing a plurality of base stations, wherein the mobile communication terminal acquires access by accessing the base stations .
The obtained base station identification information obtained this time
As a result of comparison with the previously obtained base station identification information,
Times acquisition base station identification information and the previous acquisition base station identification information and
If are not the same, the mobile terminal
The base station identification information and the own station number are
Mobile station via the base station when calling a mobile station.
Transmit to the monitoring station and monitor the mobile station
The station communicates with the base station transmitted from the mobile communication terminal.
A mobile communication system characterized by retrieving corresponding position data from the stored plurality of position data based on time-acquired base station identification information.