JP3039519B2 - PHS handset with anti-theft function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a PHS (Personal
Handy-phone System), which relates to an anti-theft system using a so-called simplified mobile phone system.

[0002]

2. Description of the Related Art PHS is a kind of portable radio telephone system. The range covered by a radio base station is about several kilometers in a conventional portable telephone system.
In PHS, it is as small as 100 to 500 meters. Therefore, if the location of the base station with which the communication is performed is known, the PHS is determined by the error in the service area range of the base station.
Know where your handset is.

[0003] As an application utilizing this,
A "location information service" is known in which a current position of a designated PHS handset is displayed on a map by issuing a request by telephone and returned by fax. This service has a function of periodically transmitting location information as data to a user's computer in addition to providing information by fax.

Japanese Patent Laid-Open Publication No. Hei 9-128663 discloses that a wireless communication device that transmits a terminal identification number of a local station at a predetermined timing in accordance with a PHS communication format is attached to an object to be stolen. The control station manages the location of the wireless communication device based on the terminal identification number received from the wireless communication device and the base station identification number of the base station device that has received the terminal identification number. In the case of the theft, the user inquires of the operator of the control station device by telephone, and the operator notifies the user of the position information of the wireless communication device managed by the control station device, so that the stolen object is obtained. Describes an anti-theft system that allows the user to know the current position of the vehicle.

[0005]

However, in the conventional location information service, when the location information is required, a call is made from the telephone and obtained by facsimile, or a computer is connected to the terminal periodically. The PHS handset itself does not have a function to report the position information autonomously when the PHS handset itself detects the movement. In addition, it is not suitable for the purpose of preventing theft because the report cannot be received by a normal telephone.

Also, in the anti-theft system described in the above publication, the position information of the radio communication device is merely managed by the control station device as position information, and unless the user recognizes that the device has been stolen. , Does not function as a system.

Further, if such a function is provided, the amount of conversion to the PHS switching equipment becomes enormous,
The realization cost becomes large.

An object of the present invention is to provide a PHS handset with:
Another object of the present invention is to provide an anti-theft function at a relatively low cost by providing a means for autonomously reporting the position information of the PHS handset when the movement is detected.

[0009]

The PHS handset with an anti-theft function according to the present invention utilizes the fact that the coverage area of a PHS base station is small, and the PHS handset itself detects movement of about several hundred meters, and detects the movement. By automatically transmitting information to a preset telephone number, it is possible to report that there has been a movement by a message or a sound, etc. Suitable for application.

The PHS handset has the following standard functions:
BCCH periodically released by the base station in the standby state
(Broadcasting Control Channel) signal is always received and the CS (Cell Stati
on) By reading the number, there is a mechanism to know the base station area where the user is located and whether the user has moved to another area.

The present invention is characterized in that the above-mentioned standard functions are used, and a means for realizing the following functions is added to the PHS handset. First, the theft monitoring start and stop buttons are added. Second, means for storing the CS number at the time when the theft monitoring start is set, and comparing the stored CS number with the newly received CS number to determine whether the user is at the original position or has moved. Means for determining whether Third, a function is provided for automatically calling a pre-registered telephone number when it is detected that the user has moved.

Further, when the BCCH is lost for more than several tens of seconds, even if the content of the newly received BCCH is the same, it is determined that there has been a movement of leaving the service area and returning again. It has.

According to the present invention, when the theft monitoring start button provided on the PHS handset is pressed,
When the PHS handset has been moved by the means described above, the PHS handset automatically connects to a pre-registered telephone number.

[0014] Then, when there is a response, the movement is reported to the responder by a message or an audible sound. As this audible sound, for example, two types of one intermittent sound and two intermittent sounds are provided, and the former is such that the PHS handset moves from the first base station area to another base station area and then returns to the original base station area. It is determined in advance to indicate that the user has returned, and that the latter indicates that the user has moved to another area.

The BCCH transmission cycle is usually 1 to 2
Since the time is set to about seconds, if the BCCH is not received for a longer time than that, there is a possibility that the mobile station has once moved out of the coverage area of the CS. However, usually, the radio wave condition is not always stable, so it is highly likely that a false report will occur if it is not possible to receive the signal once and it is immediately determined that there has been a move. It will be decided after monitoring.

In the state where the PHS terminal has left the coverage area of the base station, telephone connection cannot be made. In this case, a report is issued when returning to the coverage area.

The present invention has a function of autonomously reporting when a movement is detected in the PHS terminal as described above.
The anti-theft function can be realized only by adding the above functions to the PHS handset without changing the mechanism on the PHS exchange side.

[0018]

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a PHS handset 1 is a PHS handset with an anti-theft function of the present invention. The PHS handset 1 receives a BCCH signal transmitted by the base station periodically (every 1 to 2 seconds) while in the service area of the base station 2, extracts its CS number, stores it in a memory, , Is compared with the previously stored CS number.

When the base station 2 receives a call from the PHS handset 1 or a call to the handset 1,
This is for making a call connection. Further, the base station 2
It is connected to the S exchange 3, where telephone exchange processing is performed. If one of the connections is a fixed telephone, the connection is made via the existing switching network 4. Here, a state where the telephone is connected to the fixed telephone 5 is shown.

Next, basic types of movement will be described with reference to FIG. That is, in the following case, PH
It is determined that the S handset 1 has moved.

When the PHS handset 1 moves out of the service area A of the base station 2A and does not return.

When the PHS handset 1 moves out of the service area A of the base station 2A, and then returns to the original service area A again.

When the PHS handset 1 moves from the service area A of the base station 2A to the service area B of another base station 2B.

'When the PHS handset 1 moves from the above-mentioned state to the service area C of another base station 2C.

When the PHS handset 1 moves out of the service area A of the base station 2A, and then moves to the service area B of another base station 2B without returning.

Next, the operation of the present invention will be described with reference to the flowchart of FIG.

When the PHS handset 1 is in the standby state in the service area A, the PHS handset 1 continues to receive the BCCH periodically transmitted by the base station 2A. When the monitoring start button is pressed, the CS number included in the BCCH signal is written to the original CS number storage provided in the PHS terminal.

Thereafter, the monitoring of the BCCH signal is continued, and when reception becomes impossible, the time is measured by a timer, and it is determined that a movement has occurred when a predetermined time, for example, 30 seconds has elapsed. On the other hand, when the reception of the BCCH signal is continued, the CS number included therein is read and compared with the data in the original CS number storage unit. If the data do not match, it is determined that the mobile station has moved to the service area of another base station.

When it becomes impossible to receive the BCCH and it becomes possible to receive the BCCH again, the CS number contained therein is read out and compared with the data in the original CS number storage unit. If the data match, it is determined that the handset 1 has returned to the original position. At this time, if the data does not match, it is determined that the mobile station has moved to the service area of another base station.

When detecting that the PHS handset 1 has moved in this way, the PHS handset 1 calls up a telephone number that has been input in advance by automatic dialing. When there is a response, a notification that the mobile device has moved and a mode of the movement are notified by a dial tone. That is, one intermittent sound is sent out when returning to the original area even after moving, and two intermittent sounds when moving to another area.

In the above-described embodiment, only the report as to whether or not the user has moved and whether the range is close to the original position or not is reported. It can have a tracking function.

The PHS terminal stores the currently stored C
When a CS number different from the S number is received, the storage contents of the CS number storage unit are updated or stored as the latest CS number according to the newly received CS number, and the CS number is transmitted to the telephone answerer. Is notified, the service area where the PHS terminal is currently located can be known.

[0033]

According to the present invention, for example, when parking a car, if the PHS handset according to the present invention is installed in the car, if the car is stolen or the car is moved, The automatic report is made by telephone, so that the owner of the vehicle can be notified of the abnormality, and can immediately start an investigation, thereby increasing the probability of discovery.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention.

[Description of Signs] 1 PHS handset 2 Base station 3 PHS exchange 4 Existing switching network 5 Fixed telephone

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/26 H04Q ⁷ /04-7/38 G08B 13/00-15/02 G08B 23/00-31 / 00

Claims (5)

(57) [Claims] 1. A button for setting the start and release of the theft monitoring on a PHS terminal, a CS number storing means for storing a CS number received when the theft monitoring start is set, and the CS number storing means C stored in
Movement detecting means for detecting movement by comparing the S number with the newly received CS number, and means for automatically calling a telephone number registered in advance when the movement is detected by the movement detecting means A PHS handset with an anti-theft function comprising: 2. The method according to claim 1, wherein the movement detecting means receives a CS number different from the CS number stored in the CS number storing means or sets the CS number stored in the CS number storing means for a predetermined time. 2. The PHS handset with an anti-theft function according to claim 1, wherein the PHS handset has a function of judging movement when no reception is made. 3. If the CS number stored in the CS number storage means cannot be received for the predetermined time or more, an automatic call is made to the pre-registered telephone number when the CS number is received thereafter. 3. The PHS handset with an anti-theft function according to claim 2, wherein the PHS handset has a function of performing the function. 4. The PHS terminal stores a currently stored C
When a CS number different from the S number is received, the storage contents of the CS number storage means are updated or stored as the latest CS number according to the newly received CS number, and the previously registered telephone number is stored. The PHS handset with an anti-theft function according to claim 1, wherein an automatic call is made to the PHS handset. 5. An anti-theft system for a vehicle, wherein the PHS handset with the anti-theft function according to claim 1 is mounted on a vehicle.