JPH11203582A - System and equipment for monitoring/searching position - Google Patents

Abstract

PROBLEM TO BE SOLVED: To report the fact of detachment without a time delay when a terminal to be searched is detached from a body by providing a sensor, with which the detachment from the prescribed mount is detected, while integrating or connecting it with the terminal to be searched. SOLUTION: The sensor for detecting the detachment from the prescribed mount is provided while being integrated or connected with the terminal to be searched and at the time of detachment detection, the terminal to be searched reports at least one of its own stored CS (cell) ID (identification code/number), its own PS (terminal) ID (identification code/number) and the fact of detachment to a searching side telephone directly or through the mediation of an exchange station. The detachment sensor forms an electric switch in the state (A) of turning on two metal pieces 1 and 2, which are elastic and mutually contacted, provided in the terminal to be searched, for example, an insulator 3 is inserted from the outside and turned off at all the time, when that insulator is bound by a string or the like and the terminal to be searched is detached, the insulator is removed, a contact is turned on and the specified program of the terminal to be searched is activated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a cell structure of a cellular mobile communication system to detect the position of a terminal to be searched in units of cells or more precisely, and to monitor and search for a body to be searched for. Belongs to the field. Specifically, a mobile phone or PHS terminal to be searched is attached to the monitored object / searched object, and its cell structure is used to manage the position of the mounted object, to ensure safety, security,
Related to security technology.

[0002]

2. Description of the Related Art Specific terminal PSID stored in terminal location registration database provided in the station in PHS system etc.
Search for PS position using CSID of each location (M
A method for notifying C) is known. 2. A method of directly communicating a CSID stored in a terminal with a searcher is also known. 3. A method of monitoring and searching for a wearer using such information has been proposed.

[0003] 4. As the searched terminals, there are known a call / search target terminal in which software is added to a general call terminal, and a search target terminal which is reduced in size by limiting the call function as much as possible. . 5. It is also known to provide them with an emergency call push button. 6. The publication of the present inventor also describes that a sensor such as a peripheral sound or a GPS is built in or connectable, and the output of the sensor is reported.

[0004] 7. A system in which a directional antenna is added to a search-side mobile terminal, and a transmission radio wave of the search target terminal is detected, tracked, and captured in a transceiver mode is described in a publication by the present inventor. At this time, the audible sound may be transmitted to the searched terminal for direction identification, and the reception R from the searched terminal may be used.
It has been proposed to use F intensity.

[0005] 8. There is known a method of comparing the received RF intensities from a plurality of neighboring cells including the located cell to determine the located cell of the searched terminal, and determining the cell having the highest strength as the located cell. A method is also known in which a plurality of cells receive radio waves from a specific terminal under test, compare the RF intensities, and determine the cell having the maximum intensity as the location cell.

[0006] 9. For fine positioning below the cell unit, use P
There have been proposed a method of receiving the S radio wave by 3CS and calculating the PS position from the RF intensity, and a method of receiving the radio wave from 3CS by PS and calculating the PS position from the received RF intensity.

[0007] 10. However, in this calculation method, it was found that the cell shape was limited to buildings and the like and almost limited to along the road, and furthermore, it was not possible to calculate due to the reflected waves from the buildings. RF strength or 3C
A method has been proposed in which the reception intensity of the radio wave from S at the PS is created as a database and used. It has also been proposed to have the shape of each cell as a database. These CSs have a total of three-dimensional data of the position, which is two-dimensional data, and the RF intensity for each CS.

[0008]

Problems to be Solved by the Invention Problems 1.1. When examining an application example that requires a search, it is noticed that the searched terminal often leaves the mounted body. It has been reported that wandering elderly people often discard the terminal under investigation. In the kidnapping or robbery of schoolchildren, the criminal first seeks out the terminal to be searched or destroys it. The same goes for theft cases of valuables, artworks, cash transport boxes and cars. In this case, it is necessary to notify the fact of departure before being destroyed without delay. Since no cell movement is involved, the handling needs to be treated the same as an emergency button.

Problem 1.2. When the person wearing the detected terminal loses consciousness due to illness or falls, or when the criminal suffers an assault disorder, if the person faints or becomes incapable of pressing the emergency button, cell movement will not occur and abnormalities cannot be detected. .

Problem 1.3. Proposals for attaching an emergency button to a searched terminal are known. There is an example in which the button is actually installed, but the button diameter is about 10 mm, and the button cannot be pressed unless the terminal to be searched is taken out of storage in a pocket or the like and is visually observed. When attacked by a criminal or the like, there is no room for removal from the storage, and if removed, the criminal will be taught about the existence of the probed terminal, and will be taken up and destroyed.

Problem 2.1. When a directional antenna is attached to the main search terminal (searching terminal) and the target terminal is tracked and detected while detecting the direction, the audible sound emitted from the target terminal is an angle to sound because the audible sound emitted by the target terminal is digital. Since the intensity is binary and difficult to use, the RF intensity is more desirable, but generally the RF intensity is often expressed numerically by a dB value. However, the reflected waves and absorption constantly fluctuate over time due to the movement of people and automobiles, and the local strength (abbreviated as multipath) generated by the interference between these many reflected waves and the main wave causes the time even at the same receiving point. And the fluctuation range of the measured RF intensity reaches 10 to 20 dB. This fluctuation makes it difficult to determine the direction. This numerical display is not intuitive to ordinary people and is difficult to use.

Problem 2.2. If the RF intensity is used for the directivity determination, the voice communication is not effectively used and is useless.

Problem 2.3. Distance L between the terminal to be searched and the main terminal
Is farther away, the received RF strength dB value increases linearly with LogL as L decreases, but as it approaches, the increase in received RF strength dB generally decreases and eventually reaches a specific constant saturation value. This saturation characteristic flattens the angle dependence of the antenna and significantly degrades the directivity.

Problem 2.4. When the searched terminal enters a communication-disabled area such as a building or underground mall in any cell, if there is one or more communication-disabled areas in that cell, it is unknown which communication-disabled area, so all communications are sequentially performed. Search for an impossible area (for example, when the searched terminal cannot talk, set itself as a transceiver mode and a talk mode alternately switching mode, and the main searching terminal sets itself as a transceiver mode to detect a direction and search and capture at the transceiver of the searched terminal. ) Had to do. If it is possible to roughly know in which communication-disabled area the terminal to be searched is located, the subsequent search becomes easier, but there is no means for that.

Problem 3. The cell location determination method of the PS described in the prior art 8 is sufficiently accurate for a small cell having a cell size of about 100 m in radius. However, the position accuracy is too coarse for a medium-sized cell having a radius of 300 to 500 m.
A system in which small cells and medium cells are mixed is also used at present. In this case, the accuracy is about 100 m, and in a good application field, 1
In order to improve the size to about 00 m, a fine position determination method and a direction detection method in a unit of cell or less are too complicated.

Problem 4. When the terminal to be detected is mounted on a duralumin case for cash transport or the like, the terminal to be detected needs to be mounted in the case in order for the criminal to notice and not remove the terminal.
However, since the antenna is built in the terminal to be searched, radio waves are shielded by the metal case wall and communication becomes impossible, so that search and monitoring cannot be performed. For this reason, only the antenna needs to be penetrated through the wall and taken out of the case. This antenna must not be easily detected by the criminal.

Problem 5 In the direction finding method, search / capture personnel must not go to the cell. However, there is a case where acquisition is not required, but there is a case where it is desired to know the intra-cell fine position information. In this case, there is a problem in too much data creation and complicated processing of the three-dimensional database system of position and intensity. Issues 2.1. The interference of the multiple reflected waves and the fluctuation of the reception intensity due to the temporal fluctuation described in (1) significantly deteriorate the measurement accuracy. That is, there is a limit to the method using the reception intensity.

[0018]

Means for Solving the Problems The solution of the problem 1 is described in claim 1. Solution to Problem 2 is shown in Claim 2. Solution to Problem 3 is shown in Claim 3. Solution to Problem 4 is shown in Claim 4. Solution to Problem 5 is shown in Claim 5.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1-1. The embodiment of Claim 1-1 is shown. An example of a detachment sensor is shown. For example, as shown in FIG. 1, two metal pieces 1, 2 provided in the terminal to be detected and contacting each other with elasticity.
Forms an electrical switch in the ON state (FIG. 1-A), the insulating piece 3 is always inserted from the outside and turned OFF (FIG. 1-B), and the insulating piece is fastened to the clothes with a string. Then, if the terminal to be detected comes off, the insulating piece is removed and the contact becomes O
It becomes N and starts a specific program of the searched terminal.

FIG. 1C shows an example in which the terminal 10 to be searched is mounted in a pocket 6 provided in clothes or the like. Reference numeral 5 denotes a metal fiber bundle inserted into the bottom of the pocket.
The contacts 1 and 2 are in contact with the metal fiber bundle 5 and both contacts are electrically short-circuited to be in the ON state.
Is left and the terminal to be searched is taken out and turned off.
This is another example of a detachment sensor. As the terminals 1, 2, the existing charging terminals may be combined with diodes or the like and used also as the detachment sensor. In addition, there are various sensors such as a reed switch and a permanent magnet operated by magnetism. Activating a specific program by the searched terminal with this sensor output can be easily implemented by the parties concerned.

Embodiment 1-2 and Embodiment 1-2 will be described. Accelerometers and shock sensors are already on the market,
Easily available. FIG. 2 is a simple example inexpensive. The metal mass 7 supported by the metal spring 8 is brought into contact with the metal electrode 9 which is normally insulated by a gap at the time of impact or high acceleration to conduct.

FIG. 3 shows an embodiment 1-3 and an embodiment of the present invention. The area of the head of the emergency push button is about 15 mm or more in diameter, preferably about 30 mm in diameter, and the structure is such that it can be pushed by a palm or a grip fist without the need for accuracy of the pushing position even from outside of clothes, a jacket, and a flexible bag. . Of course, the head of the button needs to be recessed from the outer wall 13 of the probed terminal so that it cannot be erroneously pressed due to inadvertent contact with another object. It must be covered with a metal foil or the like that does not break on contact.

In FIG. 3, reference numeral 4 denotes an outer wall of the terminal to be searched, which is provided with a concave portion and provided with contacts 1 and 2. Reference numeral 11 denotes an aluminum foil, which can use a cooking foil or the like. It also serves as a button head and a button for preventing accidental pressing. 12 is a washer ring,
13 is a holding screw ring. 11 is pushed in at 12 and tightened and fixed at 13. The aluminum foil 11 is broken by the pressing, and the terminals 1 and 2 are electrically short-circuited. It is not necessary to explain that the necessary programs can be started.

Form 2-1. The embodiment of Claim 2-1 is shown. As described in Task 2.1, the received RF value shows a large temporal variation. Thus, instantaneous readings are too error-prone. For this reason, continuous observation (for example, at 0.5 second intervals) of a specific time T, for example, T = about 5 to 10 seconds, and statistical processing are required. Direction finding is generally performed along the road. For this reason, should we proceed in a road intersection in three directions: forward, right or left? It is enough to be able to judge

It is required that the RF intensity difference between the three directions can be clearly determined in comparison with the fluctuation range in each direction. According to the statistical theory, an observation time is required in which the ratio between the difference between the average values and the standard deviation (t value of the t test) is sufficiently large. The RF values in the three directions at that time are compared to proceed in the direction of the maximum intensity.

Since it is troublesome to perform these calculations at the terminal to be searched, simpler processing is sufficient if human judgment is added. For example, as shown in FIG. 4, three pseudo-polar coordinates (for example, the maximum scale is 50 dB; the dynamic range is 10 to 60 dB according to the PHS standard) are provided at right, front, and left, which share a 10 dB point. Observe in the direction for 10 seconds, and plot the measured value every 0.5 seconds on the line. That is, the fluctuation range for 10 seconds (FIG. 4A) is displayed on each line. If a human judges these three displays, the direction in which the vehicle moves is known.

With a little more advanced processing, when plotting,
When the measurement points overlap, if the plots are alternately plotted on the left and right across the old point, the width of the plot is proportional to the frequency of the measured values, so that the frequency distribution (FIG. 4B) is measured, and human judgment Make it easier and more accurate.

These are the LCs normally provided in the PHS.
It can be displayed on the D display. The three straight lines in FIG. 4A can be replaced by three light emitting diode rows instead of displaying on the LCD.
The average value in each direction can be numerically displayed on the LCD display, but the graph display is more suitable for general use such as a wandering elderly family. For higher altitudes, it is of course possible to display only the direction of travel by automatically judging the right, front and left from the calculation result.

Form 2-2. The embodiment of Claim 2-2 is shown. This can be realized by installing an acoustic sensor such as a microphone provided in a normal PHS at an appropriate position. If the RF intensity is used for the direction detection, the voice part for call can be used as it is for the sound notification, and therefore there is an advantage that the surrounding sound of the terminal to be detected can be monitored while the direction is detected. Information such as the conversation of the culprit, the situation of the carrier with the sudden illness, and the surrounding sounds useful for specifying the position can be obtained.

Since the PHS is a digital system, RF
Is not necessarily required. The RF value is required for switching cell stations when the PS moves. For this reason, even in the transceiver mode, when the distance between the terminal to be searched and the main terminal is short and close, the dB value decreases as the distance L between the two decreases (approaches) from about 10 dB to 50 dB, as shown by the solid line in FIG. Rises almost linearly, but the rise slows down from near 50 dB and shows a saturation characteristic, and when it approaches further, it reaches a constant value of about 60 dB and completely saturates. The PHS standard requires a monotonic increase during this period, and the degree of linearity is given a degree of freedom. In this saturation region, even if the direction is detected, the reception intensity becomes constant at all angles, and the directivity is completely lost.

For this reason, the present invention reduces the transmission or reception antenna gain when approaching saturation. This is because the saturation occurs in the amplification section of the receiving circuit. To reduce the gain, an attenuator such as a resistor may be provided between the circuit input and the antenna, and the impedance matching between the antenna and the circuit may be broken. In the latter case, the radiation of the antenna decreases and the radiation of the housing of the circuit section increases, but the radiation decreases as a whole. In the main search terminal provided with the directional antenna, the casing radiation has almost no directivity, and in this case, the overall directivity decreases. Therefore, it is necessary to shield and block the casing radiation.

Generally, in order to approach from about 500 m to about 1 m, the required reduction amount is required twice about 20 dB. In this case, it is difficult to achieve the attenuation of 40 dB only by the terminal to be searched or the main terminal, because it is difficult to shield the input and output of the attenuation function unit, and there is radio wave leakage in space propagation and it is impossible. Therefore, when approaching and the reception RF intensity of the main search terminal becomes about 45 dB (point a in FIG. 5), first, the search target terminal side reduces about 20 dB,
When the distance further approaches and becomes about 45 dB again (point b in FIG. 5), about 20 dB is reduced on the main search terminal side. The searched terminal is programmed so that the reduction switching at the searched terminal is performed by transmitting a control signal from the main searching terminal. The dB to LogL characteristic when the two-stage switching is performed in this manner is shown by a dotted line in FIG.

Mode 2-4. The embodiment of Claim 2-4 is shown. When the detected terminal is in the communication disabled area, use the fact that the frequency of the pager is 280 MHz, the wavelength is about 7 times that of 1.9 GHz of PHS, and the radio waves can reach the communication disabled area of PHS by diffraction. Then, the searched terminal located in the communication disabled area can be searched and captured. It is known that a pager activates a wireless transmitter connected by a called party, finds the direction of the radio wave and searches for and captures a pager carrier. However, in this case, the output of the transmitter requires a large amount of power to reach a long distance, and there is a problem in battery life and size. The present invention further relates to this page.
A combination of a jar and a radio transmitter is further combined with a PHS to enable the PHS to be searched for in a non-communicable area of the terminal to be searched and to reduce the output of the pager-connected radio to such an extent as to reach the cell range. To make things possible.

When the searched terminal is in the communication disabled area, the main searching terminal calls the terminal with a pager. The pager activates the low power radio transmitter upon being called. The wireless signal is modulated by a specific ID sound or the like. The main search terminal has a receiver of the radio signal, and can determine the approximate location of the search target terminal in each communication disabled area based on the demodulated sound or RF intensity. If necessary, the main search terminal can carry a direction finder for the wireless device. Although the directional antenna has a long wavelength and is generally large in size, it is only necessary to be able to determine the respective communication disabled areas, so that precise directivity is not necessary, and the antenna can be downsized.

When the communication disabled area at the location of the searched terminal is specified, the PHS main search terminal can capture the searched terminal in the transceiver mode using the directional antenna. Pager +
The wireless transmitter may be independent of the PHS system or may be electrically connected. In the latter case, the searched terminal is always in the talk mode with low power consumption even when it enters the call disabled area, and it can be controlled to introduce the transceiver mode for the first time by the called pager, and the power can be saved. Can save. Radio equipment connected to the pager can be used by connecting to the antenna after modulation / amplification using the local transmission or intermediate frequency of the pager RF receiver, and integrated with the pager it can.

Mode 3 4 shows an embodiment of claim 3. In the PHS, generally, a small cell having a radius of about 100 m and a medium cell having a radius of 300 to 500 m are used in combination.
The respective cells often overlap each other, and sometimes small cells are completely included in the medium cells in a high traffic area. In these cases, it is difficult to specify a single cell as the cell where the PS is located. Also, in the middle cell, even if a single cell is specified, its cell size is too large and its position determination accuracy is reduced.

Therefore, in the present invention, a plurality (for example, three) of cells are selected and used in descending order of their RF strength. PS
To determine the approximate position, a circle having each cell radius is drawn on the map, and an area (for example, three circles) overlapping each other is determined as an approximate PS position. In this case, the RF intensity value of each cell is not required. This is because the value of the RF intensity does not contribute to improving the position determination accuracy as described in the related arts 9 and 10 and the problem 5. Ignored the actual cell shape and made it circular, but 100m
For the degree of accuracy, the approximate accuracy according to the method of the present invention is sufficient. This is because capturing is always required when high precision is required, and for this purpose, a direction finding method may be used together.

Mode 4 4 shows an embodiment of claim 4. FIG. 6 shows an example in which the present invention is applied to a handle of a cash transport duralumin case. The illustrated example shows an example in which the antenna 15 is embedded in the plastic handle 14. A coaxial cable 16 is connected to the terminal 10 to be searched. 17 is a metal case. Needless to say, the metal handle can be insulated from the outer wall and the handle itself can be used as an antenna. A slit antenna or the like may be provided on the outer wall and covered with plastic or the like to form a slit antenna. In any case, another feature of the present invention is that the appearance of the antenna is not noticed by a criminal.

Mode 5 The embodiment of claim 5 is shown. Since the means for determining the detail position using the RF intensity has an inherent difficulty as described above, the present invention seeks to determine the detail position by focusing on the arrival time of the signal.
The arrival time of the specific signal waveform is based on the fact that the first arrival time of the maximum intensity waveform can be determined as a true signal even if there is multiple reflection.

In order to determine the position with an accuracy of 10 m, the time accuracy is determined so that the propagation speed is 3 × 10 ¹⁰ cm / sec to 330 nsec.
c is required. In PHS, carrier frequency is 1.9G
Because of Hz, the wavelength is 15 cm and 10 m corresponds to 66.6 wavelengths. Since the bit rate is 384 Kb / s, 10 m or 330 nsec corresponds to 0.127 bit. Therefore, it can be said that the scale of the time measurement system is sufficient at the bit rate. 0.1 bit is equivalent to 7.9 m.

Therefore, for example, the simultaneous call area PA
Code of each CS activated by the command to
Focusing on a specific bit pattern such as an SID code or the like and performing time measurement using the specific bit change point as a time marker, an accuracy of about 0.1 bit can be obtained, so that the distance can be known from the propagation time with an accuracy of about 10 m.

Since the demodulated bit sequence signal is used,
The RF fluctuation due to the multipath effect in the carrier has already been eliminated, and the bit sequence of the strongest main wave has been demodulated.
This main wave can be considered to have arrived at PS from the building via the shortest turn along the road from CS. In a general residential area, it can be considered as a straight road with direct circular propagation irrelevant to the road. If similar information can be obtained from a plurality of CSs, the PS position on the map can be determined with an accuracy of 10 m or less.

Next, determination of the propagation time will be described. If the system can be changed so that each CS transmits a synchronized time marker signal, the propagation time can be easily determined (claims 5-1 and 5-2).

However, in the current PHS system, transmission of each CS and reception of each PS have a unique time error. In such a case, if attention is paid to the phase such as bits, in the circular propagation area, as shown in FIG. 7 by applying the principle of the dual phase difference method (claim 5-3) used in the GPS positioning, as shown in FIG.
In the example shown in S, CS1 is used as a reference station, and in the other 2CS examples, CS2 and CS3 are regarded as GPS satellites, and the base line distance between PS and its specific CS1 can be determined. If the other CSs are sequentially designated as the reference CSs sequentially and the remaining CSs are regarded as GPS satellites and the same procedure is performed, each C
The distance to S is obtained, and the position of the PS on the map is obtained more accurately than the method using the RF intensity.

[0045]

According to the first aspect of the present invention, monitoring / searching / positioning of the position of the terminal-attached body using the cell structure of the mobile communication terminal is performed.
At the time of capturing, the departure and impact sensors detect that the detected terminal is abandoned by a wandering old man or taken up and destroyed by criminals such as kidnapping, robbing, assault, etc., and can take early action. In such an emergency, even when there is no room to remove the terminal to be searched and press the emergency button, it is possible to press the terminal from outside of the clothes or jacket while wearing it.

According to the second aspect, when determining the position of a detail in a cell by the direction finding method, the fluctuation of the RF intensity is statistically processed, the graphic display can be performed, and the wandering family can be used. In addition, it is possible to monitor the surrounding sound of the terminal to be detected, and to recognize the health condition of the wearer, the conversation of the criminal, the characteristic sound of the surroundings, etc., and to facilitate coping.
Prevents PHS reception strength from saturating due to proximity 5
The direction can be detected in a wide range from 00 m to 1 m. In addition, the use of a pager makes it easy to determine the inaccessible area of the searched terminal in the cell and facilitates the search and capture of the searched terminal.

According to the third aspect, the cell radius is 300 to 5
In the case of a medium cell of 00 m or a mixture of such medium cells, almost the same position determination accuracy as that of a small cell can be obtained.

According to the fourth aspect, the terminal to be searched can be attached to a cash carrying duralumin case or the like so as not to be found by a criminal.

According to the fifth aspect of the present invention, in the remote location determination of the location of the terminal to be searched, a location determination method using a propagation time which avoids an essential defect when using the RF intensity is provided, and the accuracy is further improved. Can be enhanced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of an example of a detachment sensor.

FIG. 2 is a sectional view showing the structure of an example of an impact sensor.

FIG. 3 is a structural sectional view of an example of an emergency push button.

FIG. 4 is an example of a graph display of received RF intensity.

FIG. 5 is a characteristic diagram of received RF intensity and Log L.

FIG. 6 is a structural sectional view of an example in which an antenna is provided on a handle of a duralumin case.

FIG. 7 is a mutual layout diagram of the double phase difference method.

[Explanation of symbols]

 1, 2 Detachment sensor contact 3 Insulation strip 4 Terminal wall to be detected 5 Metal fiber bundle 6 Clothing pocket 7 Metal mass 8 Metal spring 9 Metal electrode 10 Terminal to be detected 11 Aluminum foil 12 Washer ring 13 Holding screw ring 14 Handle 15 Antenna 16 Coaxial cable 17 duralumin case outer wall

Claims (5)

[Claims] 1. A cell-based mobile communication system is used, a terminal to be monitored (hereinafter abbreviated as a terminal) is mounted on a monitored / searched object, and the position of the terminal to be searched is determined by the cell where the terminal is located. 1. A system and a device for monitoring and / or searching (hereinafter abbreviated as "monitoring / searching") in cell units, wherein the searched terminal has at least one of the following means. A sensor for detecting detachment from the predetermined wearing body is provided integrally or connected to the terminal to be searched, and the terminal to be detected stores itself (CS) when detecting the detachment, either directly to the search-side telephone or through the mediation of the exchange. ID (identification code / number), own PS (terminal) ID (identification code / number), departure fact,
Means for notifying at least one of A sensor for detecting an abnormal shock (acceleration) is provided integrally or connected to the terminal to be detected, and the terminal to be detected stores the CSID ( 2. Means for notifying at least one of cell identification code / number), own PSID (terminal identification code / number), and fact of receiving abnormal shock (acceleration). An emergency push button is provided, and the button has a large dimensional structure that can be pushed from outside without visual confirmation of the position via a cloth or a jacket of the pocket, and the CSID, own PSID, emergency Means for informing at least one of the facts to the searching telephone directly or through the mediation of an exchange, 2. Using a cell type mobile communication system, a monitored terminal of the system type is attached to a monitored / searched object,
A system for monitoring and searching the position of a terminal to be searched by a cell in which the terminal is located, in a cell unit, wherein a main search terminal uses a directional antenna to detect a position of the terminal to be searched in a cell. A system and a device characterized by having at least one of the following means at the time of direction detection: The main probe does not measure the received electric field strength (RF strength) from the probed terminal, but a statistical characteristic value (average value, average value, etc.) of a plurality of measured values at specific time intervals during a predetermined observation time.
Means for detecting directionality by displaying a graph of a standard deviation, a variance, a fluctuation range, a maximum / minimum value, or the like, or a statistical characteristic value (frequency distribution other than the above), a lamp row display, or the like. 2. 2. The terminal to be detected transmits a surrounding sound using a built-in or attached microphone. When the distance between the main search terminal and the searched terminal is short, the RF intensity increases and the saturation occurs and the searched terminal or /
And means for reducing the antenna gain of the main search terminal to avoid saturation. 4. The called terminal is combined with a pager or a functional circuit thereof, and a radio transmitter or a circuit thereof at a frequency near or lower than the operating frequency of the pager, and the radio transmission is activated by the called of the pager. Means. 3. A cell-based mobile communication system is used, and a monitored terminal of the system is mounted on a monitored / searched object.
A system for monitoring and searching the location of a terminal to be searched in units of cells using the cell in which the terminal is located. And means for notifying two or more CSIDs specified in advance to a storage or search telephone. 4. Using a cell type mobile communication system, a monitored terminal of the system type is attached to a monitored / searched object,
A system for monitoring and searching for the position of a terminal to be detected in a cell unit by a cell located therein, wherein the terminal to be detected can be installed in a metal container, and a handle provided electrically insulated on an outer wall of the metal container. , Legs, or at least a part of the decoration as an antenna, or using them as an insulating material and installing the antenna in it,
It has a structure in which the antenna and the terminal to be detected can be connected through the outer wall, or a structure in which slits and holes are provided in the outer wall metal and the gap is used as a radio wave emission port, and the presence of the antenna is concealed in appearance. , Its equipment and its metal container 5. Using a cell type mobile communication system, a monitored terminal of the system type is attached to a monitored / searched object,
A system for monitoring and searching the position of a terminal to be searched in units of cells by the cell in which the cell is located, wherein the system measures a detailed position of the terminal to be searched in units of cells or less by at least one of the following means. And its equipment Time signals of radio waves from a plurality of CSs (time using specific signals / signal changes as time markers, bit phase, subcarrier phase, carrier phase, etc.) are measured by the probed terminal,
Means for calculating the location of the searched terminal from the information and each CS location. 2. The time signal (time, bit phase, subcarrier phase, carrier phase, etc.) of the radio wave from the terminal to be detected is measured by the terminal to be detected, and the target device is searched from the information and each CS position. Means for calculating the location of the terminal. 3. A pair of a reference position terminal provided in one CS station (or a new fixed position) and a terminal to be searched are paired with time signals (bit phase, subcarrier phase, carrier phase, etc.) of radio waves from two or more other CS stations. A) measuring the difference between the pair and the pair, and calculating the position of the terminal to be searched from the amount of the difference, the position of each CS, and the reference terminal position.