WO2002035413A1

WO2002035413A1 - Command supporting system, command terminal, and command center device

Info

Publication number: WO2002035413A1
Application number: PCT/JP2001/008950
Authority: WO
Inventors: Shohachi Matsuzawa; Takashi Yonemitsu; Ken Kamiyama; Koichi Takahashi; Kenichi Matsumoto
Original assignee: Secom Co.,Ltd.
Priority date: 2000-10-20
Filing date: 2001-10-11
Publication date: 2002-05-02
Also published as: KR20030043982A; AU2001294231A1; JP4077314B2; JPWO2002035413A1; TW535087B; KR100847017B1

Abstract

A command supporting system capable of supporting a proper command. A command terminal (5) transmits information on its present position and the working state of the worker who has the command terminal (5) to a positional information processing unit (1) and a command unit (2). The command unit (2) selects and displays, when the command is issued, a command terminal (5) that is a candidate of an object to whom the command is to be transmitted, with reference to the present position of each command terminal (5) and the working situation of the worker. This worker refers to this display to determine the command terminal (5) to whom the command is to be transmitted.

Description

Description Command support system, command terminal and command center device

The present invention relates to a command support system, a command terminal, and a command center device for transmitting a work command to a moving person, such as a security person, and is particularly suitable for a system for commanding a search for a search target that is a moving object. It relates to a command support system, a command terminal and a command sensor device. Background art

In companies such as security companies that move out of their offices and carry out work at their destinations, the status of each worker (current position and work status) is reported by means of a mobile phone or other means. Based on this, the center side grasps the information, and for example, selects a person in charge according to a request from a customer who has a security contract, and gives instructions to the selected person in charge.

In this case, the commander on the center side selects a worker in consideration of a plurality of conditions based on information on the current position reported by each of the plurality of workers and a report on the work status. ing.

In particular, in recent years, there has been a growing need for search and protection services for mobile objects such as wanderers, children, stolen vehicles, etc., and instructed the above-mentioned workers (which also move) to search for targets. There is a need for a system that is suitable for doing so.

However, with the conventional 'command method', the work of the commander is too complicated, and if the number of workers increases as the number of security contracts (ie, the number of customers) increases in the future, the appropriate There was a problem that the order became difficult.

In consideration of cases where there are multiple workers in charge of a single directive or when a worker to be supported is instructed later, lend a mobile terminal to each worker and It is desirable that the terminal can easily access the work contents managed on the center side. However, this is freely accessible In this case, there is a problem that the security of the work content is reduced when the portable terminal is stolen.

Furthermore, when it is time to search for a mobile object that has been searched, it is necessary to accurately determine the current position of the search object and issue an appropriate search instruction according to the movement situation. However, there has been a system that measures the position using a GPS (global positioning system) using satellites or a cellular telephone network (PHS; Personal Handy-Phone System) using small cells. However, GPS, for example, makes it impossible to receive signals from GPS satellites when indoors, making accurate measurements impossible. In PHS, handover cannot be performed properly when moving at a high speed, and position information cannot be detected.

The present invention has been made in view of the above circumstances, and has as its object to provide a command support system capable of supporting an appropriate command by a commander. A further object of the present invention is to provide a command support system that can accurately determine the position of both a search target and a worker, and can issue a proper command according to each movement.

Another object of the present invention is to provide a command support system capable of improving the security of work contents. Disclosure of the invention

The present invention for solving the problems of the conventional example described above provides a command center device arranged on the center side for issuing a command to a person in charge, and a command terminal possessed by each of the persons in charge. The command terminal comprises: a unit for acquiring information on the current position; a unit for managing information on a current work state of a person in charge; and the command for providing the current position and the information on the work state. Means for transmitting to a center device, wherein the command center device manages the information on the current position of each command terminal and the work status of the person in charge received from the command terminal of each person in charge, and the command Means for selecting a candidate for a command terminal to which a command is transmitted by referring to the current position of each terminal and information on the work status of the person in charge when issuing a command. .

This allows the commander to know the current location of each command terminal, the time at which it was reported, Information such as the current work status of the person in charge of the command terminal is stored in the command center device, and based on this information, the command person is provided with a candidate for a command terminal to which the command selected under predetermined conditions is to be transmitted. And appropriate directives are supported.

Further, the present invention for solving the above-mentioned problems of the conventional example is a command terminal carried by a person in charge, and a means for acquiring information on a current position and managing information on a work state of the person in charge. Means for transmitting to the command center device the information on the current position and information on the work status of the person in charge; receiving a command from the command center device, and transmitting the contents of the command to the command center. And means for acquiring from the device.

Furthermore, the present invention for solving the problems of the above-mentioned prior art is provided with a means for acquiring information on the current position and the work state of the person in charge from a command terminal carried by each person in charge, and a method for issuing a command. Means for selecting a candidate for a command terminal to which the command is to be transmitted, based on the acquired information on the current position and the work state.

Here, the means for selecting the candidate for the command terminal may include a command within a predetermined range near the position related to the command based on the information on the position related to the command and the acquired current position of the command terminal. A preselection means for selecting a terminal, and a command terminal for selecting a command terminal to which a command is to be transmitted from the command terminal selected by the preselection means, further referring to information on the work status of the person in charge. It preferably comprises a selection means and

The present invention for solving the problems of the conventional example described above provides a command center device arranged on the center side for issuing a command to a person in charge, and a command terminal possessed by each of the persons in charge. The command terminal manages a unique terminal identifier set in advance, means for acquiring information on the current position, means for recording the acquisition time of the current position, A means for managing information on a current work state; a means for transmitting the terminal identifier, the current position and the information on the work state to the command center device; A means for receiving and managing, from a command terminal, the terminal identifier, the current position, and information on the work status of the person in charge, and a finger. Means for selecting a candidate for a command terminal to which a command is to be transmitted by referring to the current position of each terminal and information on the work status of the person in charge when issuing the command; and A means for registering the terminal identifier of the command end to be sent, which has been selected by the person in charge at the center, and the information of the work content related to the command to be issued, and registering the work content from the command terminal. Means for transmitting information on the work content to the command terminal when the terminal identifier of the command terminal is associated with the information on the work content at the time of the request. As a result, the security of the work content information is improved.

In addition, the present invention for solving the problems of the above conventional example supports the selection of a person in charge of searching for a moving object to be searched from among a plurality of persons in motion. A command support system that includes a target terminal attached to a search target, a command terminal possessed by each person in charge, and a command center device arranged on the center side that issues commands to the person in charge. The command center device obtains the current position information from the target side terminal, and obtains the current position information and work status information of each person in charge from each command terminal, and Means for managing the information as dynamic information of each person in charge; preliminary selecting means for referring to the dynamic information of each person in charge and selecting persons in a predetermined range near the current position of the target terminal attached to the search target; Of the person selected by the selection means Means for referring to the information on the work state of the person in charge from the status information and further selecting the person in charge of the search, and possessing the person in charge of the selected person in charge of the search The search command is transmitted to the command terminal that performs the search. In recent years, mobile phones using the CDMA (Code Division Multiple Access) method have sometimes performed so-called RAKE reception, which establishes communication with multiple base stations to reduce multipath fading. However, in order to solve the perspective problem, there may be a case where an instruction regarding the intensity of the uplink signal from the mobile phone is transmitted to the signal from each base station. It has been found that location information can be obtained using information on base stations that make up a CDMA mobile phone network, such as obtaining approximate location information based on radiation intensity instructions from each base station. . This method of acquiring location information using a CDMA mobile phone network has the advantage of being able to acquire location information indoors, although its accuracy is generally lower than that of GPS. In view of the above, the present invention provides a mobile communication system comprising: a means for receiving a GPS signal from a GPS satellite in order to detect a current position of at least one end of the target terminal and the command terminal; and a base station constituting a cellular network. A means for acquiring information related to a plurality of base stations in the vicinity of itself; and a means for transmitting the GPS signal and information about the base station to the position locating center device. The location information of the terminal is calculated based on at least one of the received GPS signal and information on the base station. In this way, the signal from the GPS satellite and the information of the mobile phone network are appropriately combined, and in some cases, the location information obtained by the GPS signal is complemented by the location information obtained by using the mobile phone network, This improves the position detection accuracy of the mobile object to be searched, enables more accurate position grasp, and contributes to search commands.

Further, as a mode of combining, the target end and at least one end of the command terminal receive all receivable GPS signals among GPS signals coming from a plurality of GPS satellites orbiting a satellite orbit. And, when the number of receivable GPS signals is equal to or more than a predetermined number, a means for controlling not to acquire information related to the base station is provided, and the location information of the terminal is based on only the plurality of GPS signals. It is also preferable that the calculation is performed by

In another mode of combining, at least one of the target side terminal and the command terminal receives all receivable GPS signals among GPS signals coming from a plurality of GPS satellites orbiting a satellite orbit. When the number of receivable GPS signals is equal to or greater than 1 and less than a predetermined number, a means for controlling so as to acquire information related to the number of base stations corresponding to the number is provided, and the location information of the terminal is It is also preferable that the calculation is performed based on the received GPS signal and information on the base station.

As still another mode of combination, at least one of the target terminal and the command terminal receives all receivable GPS signals among GPS signals arriving from a plurality of GPS satellites orbiting a satellite orbit, If there is no receivable GPS signal, a means is provided for controlling so as to obtain information relating to a plurality of obtainable base stations, and the position information of the terminal is calculated based on information about the base station. It is also preferable to use it.

Further, in the present invention, the center device includes at least a target terminal and a command terminal. Also, when receiving position information from one terminal, the terminal generates information on a GPS satellite that transmits a GPS signal receivable at that position, and transmits the generated information to the terminal. This makes it easier for the terminal to capture GPS satellites.

Further, in one aspect of the present invention, at least one of the target terminal and the command terminal transmits all receivable GPS signals among GPS signals coming from a plurality of GPS satellites orbiting a satellite orbit. The center-side device receives the information on the number of GPS signals received by the terminal, generates error information based on the information on the number, and uses the error information to provide position information or a search command. It is characterized by being provided to the processing of.

Furthermore, at the actual site of search protection, when moving in an unexpected direction at a high speed, such as when a vehicle is moving, it is not possible to accurately identify where to direct the operator, and commands are issued at each measurement point. If this happens, the work content of the worker will be confused or hindered, for example, after the moving object to be searched has already gone to another location when the worker arrives. Therefore, in one embodiment of the present invention, the center-side device detects a time change of the current position information of the target-side terminal, and calculates a moving distance of the search target; And means for controlling so as to keep transmission of the search command when moving beyond a predetermined distance.

However, in some cases, it does not move at high speed in reality, but due to position measurement errors, it may appear as if it were moving at high speed in a pseudo manner. Therefore, in another aspect of the present invention, among the GPS signals arriving from a plurality of GPS satellites orbiting the satellite orbit, the target terminal receives all receivable GPS signals, A means for obtaining information on the number of GPS signals received by the terminal, generating error information based on the information on the number, detecting a temporal change in the current position information of the target side terminal, and Means for calculating a moving distance; means for determining whether or not a change in the current position of the target side terminal is within a range indicated by the generated error information; Means for controlling so as to suspend transmission of a search command when the mobile terminal has moved by a distance or more and the travel distance exceeds a range indicated by the error information. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration block diagram of a command support system according to an embodiment of the present invention.

FIG. 2 is a configuration block diagram of the position information processing device. .

Fig. 3 is a block diagram of the command device, Fig. 4 is a block diagram of the office terminal, Fig. 5 is a block diagram of the command terminal, and Fig. 6 is the outgoing call. FIG. 7 is an explanatory diagram showing a display example of command support in the command device, and FIG. 8 is an explanatory diagram showing an example of a display screen without command end. FIG. 9 is an explanatory diagram showing a configuration for position detection in the present invention. FIG. 10 is a flowchart showing a process relating to reservation of a search command. FIG. 11 is a diagram showing acquisition of position information. FIG. 9 is an explanatory diagram illustrating an operation flow relating to FIG. BEST MODE FOR CARRYING OUT THE INVENTION

(1) Configuration

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the command support system according to the present embodiment includes a position information processing device 1, a command device 2, a plurality of office terminals 3, It is basically composed of a telephone base station 4 and a plurality of command terminals 5. In the following description, a description will be given as an example of a command when a security company searches for a search target. Therefore, the present embodiment further includes a transmitting terminal 6 attached to the search target person.

As shown in FIG. 2, the position information processing device 1 includes a communication unit 11, a map server 12, an operation server 13, a position monitoring server 14, and a position calculation center 15. Become. As shown in FIG. 3, the command device 2 includes a communication unit 21, a control console 22, a position monitoring console 23, a loss management server 24, and a management server 25. It becomes. The position information processing device 1 and the command device 2 correspond to the center device of the present invention. The position calculation center 15 may be provided on the network independently of the position information processing device 1. As shown in FIG. 4, the office terminal 3 includes an interface unit 31, a control unit 32, an operation unit 33, a display unit 34, and a storage unit 35. The command terminal 5, as shown in FIG. 5, includes a radio unit 51 having a function of receiving position information from a GPS satellite and a communication function of a mobile phone, an interface unit 52, and an operation unit 53. A geomagnetic sensor 54, a storage unit 55, a reporting unit 56, a display unit 57, a control unit 58, and a power supply unit 59. Further, as shown in FIG. 6, the transmitting terminal 6 includes a GPS receiving function for receiving position information from the GPS satellite 7, a radio unit 61 having a mobile phone communication function, and an emergency button (E). Operation unit 62, a notification unit 63, and a control unit 64. Here, in the command terminal 5, a terminal identifier for identifying each terminal is set. In addition, the calling terminal 6 is set with the contract identifier of the search target person possessing it.

In addition, the mobile phone base stations 4 are scattered in various places and are connected to a wired network. The mobile phone base station 4 is described here as a base station of a mobile phone network of the CDMA system, for example, but may be another cellular mobile phone network (PHS ゃ PDC).

The command support system according to the present embodiment is configured as described above, and the operation of each unit will be described below.

(2) Position information processing device

The communication unit 11 of the position information processing device 1 is connected to a network and receives information on its current position and the time at which the position was measured from each command terminal 5 via the mobile phone base station 4. And outputs it to the position monitoring server 14. The communication unit 11 also receives information on the current position from the transmitting terminal 6 and outputs the information to the position monitoring server 14. Further, the communication unit 11 outputs an instruction received from the command device 2 to the operation server 13, and transmits information provided from the operation server 13 to the command device 2.

The map server 12 manages the map data of each area and transmits this map data upon request. The map server 12 includes, in particular, map data of a plurality of scales, and transmits the map data of the requested scale. Here, the map data may be image data or data representing a road or a railway network by vector information. Such map data is used, for example, in the force navigation system. Such map data can be used.

The operation server 13 receives the request for information on the current position of the contractor accompanied by the contractor identifier from the command device 2, acquires the current position of the contractor managed by the position monitoring server 14, and Send to command device 2. Further, the operation server 13 receives the request for the current position of the command terminal 5 identified by the terminal identifier together with the terminal identifier from the command device 2 and receives the information of the current position of the command terminal 5. Obtained from the position monitoring server 14 and transmitted to the command device 2. Further, the operation server 13 receives the command identifier from the command device 2, the content of the command, the terminal identifier of the terminal 5 to which the content of the command is transmitted, and the contractor identifier of the contractor related to the command And manage them in association with each other. Then, a request for the content of the command is received from the command terminal 5 together with the command identifier, the terminal identifier of the command terminal 5 is obtained, and whether or not the terminal identifier is managed in association with the command identifier is determined. Only when it is performed, the content of the command is transmitted to the command terminal 5. Similarly, when a request for the current position of the transmitting terminal 6 according to this command is received from the command terminal 5, only when the terminal identifier of the command terminal 5 is associated with the identifier of the command, the command related to this command is received. The current position of the calling terminal 6 is provided to the command terminal 5.

The position monitoring server (positioning server) 14 manages the current positions of the command terminals 5 and the transmitting terminals 6. More specifically, the position monitoring server 14 receives the terminal identifier, its current position information, and the information on the time at which the current position was measured via the communication unit 11 and associates the terminal identifier with the terminal identifier. And accumulate this information. In addition, the position monitoring server 14 receives the input of the contractor identifier of the transmitting terminal 6 and the information of the current position via the communication unit 11 and associates the current position with the contractor identifier. Record information. Here, the position monitoring server 14 adds and records the information on the current position of the transmitting terminal 6 to the information already recorded in association with the subscriber identifier, and manages the information as history information on the current position. It is preferable to keep it. The location monitoring server 14 need not be one, and a plurality of location monitoring servers 14 may be installed. In this case, a widely known information sharing technique is used so that the location information provided by each location monitoring server 14 is the same.

The position calculation center 15 receives the G received from the A Ps signal, a signal from a mobile phone network, and the like are acquired, and these signals are combined and used to calculate position information and transmit the position information to the position monitoring server 14. The specific processing of the location calculation center 15 will be described later when the calculation of the location information on the terminal side is described later.

(3) Command device

The communication unit 21 of the command device 2 is connected to the network, and provides the position information processing device 1 with information on the current position of the command terminal 5 managed there and the current status of the transmitting terminal 6. It sends a request for location information (and history information), receives this information, and outputs it to the management server 25. The communication unit 21 transmits information and instructions input from the management server 25 to the command terminal 5.

The control console 22 and the position monitoring console 23 are provided for each commander so that the commander can operate each of them. The control console 22 outputs, to the management server 25, an instruction for associating the command identifier attached to the search command with the terminal identifier of the command terminal 5 that is to notify the command by the operation of the commander, Upon receiving a signal indicating that the association has been made from the management server 25, a search command is notified to the command terminal 5. Further, the control console 22 transmits to the position information processing device 1 an instruction for associating the command identifier of the command, the terminal identifier of the command terminal 5 to which the command is transmitted, and the contractor identifier related to the command. Further, upon receiving a report such as the completion of the search, the control console 22 outputs an instruction to cancel the association between the command identifier and the terminal identifier to the management server 25.

The position monitoring console 23 displays on the map acquired from the map server 12 the current position of each command terminal 5 and information on the current work status of the worker who carries it. In addition, the position monitoring console 23 displays the current position of the transmitting terminal 6 carried by the subscriber who is the target of the search command on this map.

In this display, as shown in FIG. 7, the current position of the calling terminal 6 to be searched, the time at which the information of the current position is received, and the identifier of the subscriber are displayed (X), The current position of the command terminal 5 around it, the time when the current position was measured and the terminal identifier, and the work status of the worker in charge of the command terminal 5 are displayed (Y). The search target is a circle, People change the shape and color of triangles and other shapes. The work state of the worker is indicated by a symbol such as "P" or "Ding". These conditions include the case where the worker of the security company who is the worker in charge is on patrol (P), is receiving instructions and is dealing with (T), or is waiting (W). In addition, during a response or waiting, the person may be heading to the site of the response or waiting, and has not arrived at the site to distinguish it from arriving at the site and responding or waiting. This is indicated by a symbol such as “>”. The status of the worker in charge of the action is indicated as “T>” here. Further, in FIG. 7, the triangle indicating the command end 5 to which the search instruction is related and the circle that is the current position of the search target person related to the search instruction are connected by a line, and the correspondence is visually shown. It is specified as follows.

Further, a characteristic of the present embodiment is that the terminal identifiers of the command terminals 5 capable of transmitting the commands are assigned to each of the command persons so as not to be duplicated. In other words, the commander b is assigned terminal identifiers a and b, the commander B is assigned terminal identifiers c and d, and the commander A has a terminal identifier The command cannot be sent to the command terminal 5 of c. As a result, the conflicting command is not transmitted to each worker. For this purpose, at least one terminal identifier is set in the control console 22 and the position monitoring console 23, and only information related to the command terminal 5 identified by the set terminal identifier is displayed. In addition, it is possible to transmit an instruction to only the command end 5.

The loss management server 24 accumulates the terminal identifier of the lost command terminal 5 when the operator reports that the command terminal 5 has been lost due to theft or the like.

The management server 25 stores a database that manages the current position of the calling terminal 6 of the contractor to whom the search command has been issued, the current position, the measurement time, and the And a database that manages the information on the work status of the worker who carries the work in association with each other. Also, the management server 25 receives the command identifier from the control console 22 and the terminal identifier of the command terminal 5 to which the command is to be notified. When an instruction for associating with the command is received, the content of the command and the subscriber identifier of the contractor's transmitting terminal 6 related to the command are acquired by the command identifier, and the identifier of the search command, the content of the command, and the The identifier and the terminal identifier of the command terminal 5 of the worker in charge of the work of the command are stored in association with each other, and a signal to the effect that the connection has been made is output to the control console 22.

The management server 25 determines whether or not the search command can be accepted, and only when the search command can be accepted, associates the search command identifier with the terminal identifier of the command terminal 5 or the like. Then, a signal indicating that the association has been made may be output. In this case, if the request cannot be accepted, a signal to the effect that the instruction is reserved is output to the control console 22. The process of determining whether the search command can be accepted will be described later as a reservation process.

(4)

The office terminal 3 is arranged for each office to which the worker in charge belongs. The worker first visits the office at the start of work, receives a loan of the command terminal 5 here, performs initial settings, and then carries out the command terminal 5 to go out. At the end of work, the command terminal 5 is set to end and the command terminal 5 is returned.

The interface section 31 of the office terminal 3 is connected to the interface section 52 having no command terminal 5, and exchanges data with the command terminal 5 regarding initial setting processing and end setting processing with each other. connect. The interface section 31 is, specifically, a serial interface such as RS-232C or USB. The control unit 32 performs initial setting and end setting of the command terminal 5 connected via the interface unit 31 in accordance with an instruction input from the operation unit 33.

That is, when an initial setting operation is input from the operation unit 33, the control unit 32 confirms whether or not the command terminal 5 is connected via the interface unit 31. For example, a terminal identifier is obtained from the command terminal 5, and an instruction to start the timer (not shown) is output to the command terminal 5. In addition, the office terminal 3 authenticates the worker who performed the operation, and transmits information (person identifier) for identifying the worker and information about the terminal identifier of the command terminal 5 to the command device 2. Send to. When the control unit 32 receives an input of an end setting instruction from the operation unit 33, In addition to authenticating the worker in charge, it is checked whether or not the command terminal 5 is connected via the interface unit 31.If so, a terminal identifier is obtained from the command terminal 5 and stored. Erase the memory contents stored in section 35 and

(Not shown), an instruction to stop is output, a commander identifier and a terminal identifier are transmitted to the command device 2, and a request to release the association is transmitted.

The display unit 34 performs a display for confirming the operation at the time of initial setting or end setting according to an instruction input from the control unit 32. The storage unit 35 stores a program to be executed by the control unit 32. The storage unit 35 also operates as a work memory of the control unit 32.

(5) Command end not yet

The command terminal 5 is usually provided at each business establishment, and each worker initializes using the business establishment terminal 3 and carries it. The wireless section 51 of the command terminal 5 exchanges data with the position information processing device 1 and the command device 2 via the mobile phone base station 4. The radio unit 51 receives a signal from a GPS (Global Positioning System) satellite 7 and calculates information on the current position, and outputs the information on the current position as a result of the calculation. Output to 8. The calculation of the current position will be described later in detail. The interface unit 52 is used for connection with the business office terminal 3 and transmits and receives data to and from the business office terminal 3 at the time of the initial setting / end setting processing.

The operation unit 53 outputs the contents of the operation of the worker to the control unit 58. The operation unit 53 includes a button provided on the surface of the housing, a touch panel overlaid on the display unit 57, and the like. The terrestrial magnetism sensor 54 is a compass that detects the direction of the command end 5, digitizes the information of the direction, and outputs the information to the control unit 58. The storage unit 55 operates as a work memory of the control unit 58, and stores information obtained at the time of initial setting. The notification unit 56 sounds a sound or vibrates the vibrator to alert the worker in response to a notification instruction input from the control unit 58. The display unit 57 is a liquid crystal display of a dot matrix, and displays information such as a map obtained from the map server 12 based on an instruction input from the control unit 58.

The control unit 58 receives the command identifier via the wireless unit 51, and In both cases, a request for the content of the command is transmitted to the position information processing device 1 via the wireless unit 51 (and the content of the command and the current position of the transmitting terminal 6 related to the command are obtained as a response to this request, and Is stored in the storage unit 55. Here, the current position of the transmitting terminal 6 is, for example, the history of the current position within a predetermined time in the past, or the history of the current position within a predetermined movement range (for example, the movement within 10 km). Further, a characteristic of the present embodiment is that when receiving the contents of this command, the current position of another command terminal 5 related to the command is also obtained. This makes it possible to improve the work efficiency in the case where a plurality of workers jointly search for one search target person. After receiving the input of the current location information, the time ( Together with information and the terminal identifier of Teijikoku), transmitted via the radio section 5 1 to the position information processing apparatus 1.

The control unit 58 further determines the current position of the search target person (the current position of the transmitting terminal 6 attached to the search target person) according to the contents of the command and the information on the current position of the control unit 58. The distance is calculated, the scale of the map to be acquired is selected based on the distance as a result of the calculation, and the map data of the selected scale is requested to the position information processing apparatus 1. When the map data of the reduced scale is received from the position information processing apparatus 1, the map data is displayed on the display unit 57, the current position of the search target is displayed on the display unit 57, and the own current position is further displayed. I do. Then, draw a straight line connecting them. As a result, the relative positional relationship between the search target person and the user becomes clear on the map, and the search efficiency is improved. Preferably, at this time, the direction in which the user is facing, which is measured by the geomagnetic sensor 54, is displayed in combination, and the distance between the search target person calculated in advance and the user is also displayed. The display result is as shown in FIG. Further, when the position information of the worker in charge of the joint search has been acquired, it is also preferable to display this information together. Further, the movement locus of the search target person may be displayed based on the history information. This makes the search easier.

What is characteristic in the present embodiment is that when the control unit 58 receives an instruction to delete the storage content of the storage unit 55 from the position information processing device 1 or the command device 2 via the wireless unit 51, According to this instruction, the contents stored in the storage And Similarly, the control unit 58 refers to the time measured by a timer (not shown), and erases the storage content of the storage unit 55 when a predetermined time (for example, 8 hours) has elapsed. Thereby, even when the command terminal 5 is stolen, security concerning the contents of the command is maintained. When erasing the contents of the storage unit 55, all of the contents may be erased, or only the preset contents may be selectively erased. The power supply section 59 supplies power to these sections.

(6) Calling terminal

Radio section 61 of transmitting terminal 6 calculates position information based on information received from GPS satellite 7 or the like, and outputs it to control section 64. The calculation processing of the position information will be described later in detail. In addition, based on the instruction input from the control unit 64, the position information and the previously set contractor identifier are transmitted to the position information processing device 1.

The wireless unit 61 communicates with a mobile phone network, and communicates with the position information processing device 1 and the command device 2 on the network via the mobile phone network. Specifically, the wireless unit 61 transmits a signal indicating that the emergency button (E) has been pressed to the command device 2 based on an instruction input from the control unit 64.

The operation unit 62 includes an emergency button (E) and various buttons, and outputs the contents of these operations to the control unit 64. The notification unit 63 sounds a sound according to an instruction input from the control unit 64. The control unit 64 calculates the position information based on the signal received by the radio unit 61 and the like, and periodically updates the position information and the subscriber identifier at a preset cycle (for example, once every 5 seconds). To the position information processing apparatus 1. It is preferable that this cycle can be changed by an instruction received from the position information processing apparatus 1, for example. With this, when a search is performed, the position information processing device 1 transmits an instruction to notify the position information in a shorter cycle, and the current position is transmitted more frequently in response to the instruction. be able to.

(7) Calculation of location information

Here, the calculation processing of the position information in the command terminal 5 and the transmitting terminal 6 (hereinafter, collectively referred to as “terminal”) will be described, and the operation of the position calculation center 15 will also be described.

In the present embodiment, the position calculation of the terminal is performed by GPS (Gl obal Positioning System). tern) and information related to the base station of the mobile phone network. Therefore, the principle of these position calculations will be described.

First, as shown in Fig. 9, GPS-based GPS satellites 7 (7-1, 7-2 ...) orbiting multiple satellites (for example, 24) in the orbit of the earth ) Is used to perform positioning. Each GPS satellite 7 has a unique number (identification number). A GPS reference receiving station 8 is provided at a point (reference point) whose position is accurately known. The GPS reference receiving station 8 can be accessed from the position calculation center 15 via the network. Positioning using GPS uses the relationship between the signals received from each satellite, and precise positioning requires signals from four or more GPS satellites, but generally requires three satellites. Using the signal from the star, the position can be specified with an accuracy of several meters to several tens of meters. In particular, the accuracy can be further improved by using the signal of the GPS reference receiving station 8 together (this technique is known as differential GPS).

The method of using a signal related to a mobile phone base station is as follows. That is, in recent mobile phone services, the service providing area is divided into a plurality of areas (cells) and, for example, two frequency bands are alternately used for each cell, thereby improving the frequency use efficiency. Many methods are adopted. In the cellular system, the mobile phone in each cell communicates with the base station covering that cell. Thus, by specifying the base station, the cell where the mobile phone is located can be known, and therefore, it is known that there is a mobile phone holder in the area of the cell. However, since the cells are generally relatively large, it is difficult to determine the position with an accuracy like GPS. However, for example, in a PHS network, the size of a cell is about several hundred meters, so that it is possible to specify a certain level of position. In the CDMA mobile phone network, so-called RAKE reception is performed, in which communication is performed not only with the base station of the cell to which the cell currently belongs, but also with the base station covering the adjacent cell. This is to reduce the influence of multipath fading, where signals from the base station arrive in different paths due to reflections from buildings, etc. It can be used to calculate the distance from a station. For example, three base stations nearby With reference to the signal strength of the communication, the positioning can be performed with an accuracy of about 300 meters based on the principle of three-point surveying. In the CDMA system, in particular, information on signal strength (information related to distance) may be notified from each base station to solve the so-called near-far problem. Based on the notification from three base stations, positioning with an accuracy of about 300 meters is possible based on the principle of three-point surveying.

Therefore, the terminal and the position calculation center 15 perform terminal positioning while transmitting and receiving information as follows. First, the terminal notifies the location calculation center 15 of information identifying the base station with which the terminal is communicating. The position calculation center 15 obtains the approximate position of the terminal from the notified information, and notifies the identification number of the GPS satellite 7 that can be received at the current position of the terminal to the terminal side using the approximate position. I do.

The terminal attempts to receive a signal from each GPS satellite 7 based on the notified identification number of the GPS satellite 7. Then, it receives signals (GPS signals) from all receivable GPS satellites and checks the number. Here, unless the number is 3 or more (a number that can achieve sufficient accuracy), a signal from a nearby CDMA base station (hereinafter referred to as a “CDMA signal” for simplicity) is examined. The signal from this CDMA base station requires signals from three base stations if the principle of three-point surveying is used, but if signals from two GPS satellites can be received and the position on a predetermined straight line is known, If the desired accuracy can be achieved, one CDMA signal is sufficient, and when a signal from one GPS satellite can be received, two CDMA signals are used to create one geographical point. Can be determined. Further, when no signal is received from the GPS satellite 7, the same processing as the three-point survey is performed by using three CDMA signals.

That is, in the present embodiment, the terminal determines the number of CDMA signals to be used according to the number of GPS signals received by itself, and positions the received GPS signals and the determined number of CDMA signals. Send to calculation center 15. Here, the number of CDMA signals used on the terminal side is determined, but the terminal side transmits all GPS signals that it can receive and at least three CDMA signals, and sends them to the location calculation center 15 The side may determine the number of CDMA signals to be used in the same manner as the above-mentioned terminal. The position calculation center 15 determines one geographical point based on a combination of the received GPS signal and CDMA signal. The position calculation center 15 communicates with the GPS reference receiving station 8 via a dedicated line or the Internet, acquires the signal of the GPS reference receiving station 8, and combines it with the GPS signal received from the terminal. Generate position information with higher accuracy.

The error of the position information calculated in this way is almost as shown in the following table according to the number of GPS signals.

The location calculation center 15 transmits the determined geographical point to the location monitoring server 14 as location information of the terminal. At this time, the position calculation center 15 transmits the number of GPS signals used for the calculation of the position information and the number of CDMA signals to the position monitoring server 14 together. The position monitoring server 14 stores the number of GPS signals and the number of CDMA signals as error information together with the position information. This error information is a measure of the error of the stored position information. Preferably, for example, if the position information is determined by three or more GPS signals (accuracy is 0 to 10 meters), “Rank A” " , Two If the location information is determined by the GPS signal (accuracy is 10 to 30 meters), it is "Rank B", and if it is the location information determined by one GPS signal (accuracy is 30 to 100 meters). If the location information is determined by only the CDMA signal without using the GPS signal (accuracy is 100 to 300 meters) and the GPS signal cannot be used, it is used as the “rank D” to rank the location information. . Such ranking is presented together with the provision of location information, and is also used to issue search command instructions.

More specifically, this error information is used for the reservation processing of a command described later, and is also used, for example, in the command device 2 to determine how many search personnel to dispatch. For example, ranks B and C instruct the dispatcher to increase the number of search personnel, and rank D instruct the dispatcher to reserve the search directive.

Since the accuracy of the rank setting and the error information varies depending on the method of calculating the position information, it is preferable that the accuracy can be set as appropriate. For example, a CDMA signal was used here, but if PHS is used, a different error should be set.If further high-precision position identification becomes possible in the future, change the setting. There is a need.

(8) Reservation of Directive

Here, the reservation of the command in the management server 25 of the command device 2 will be described with reference to FIG. The management server 25 acquires the history of the contractor's position information pertaining to the command from the position information processing device 1, and counts the number of position information included in the history with a power source (not shown) (S11). . Then, it is checked whether or not a predetermined number of position information has been obtained (S12). If not, the process returns to the process S11 to further obtain the history of the position information. Also, if a predetermined number of location information has been acquired in process S12, the contractor must be within a predetermined period of time (for example, once every 5 seconds, if location information is received, 60 counts will be taken within 5 minutes. The corresponding distance is calculated (that is, the speed of the contractor's movement) (S13). The predetermined number in the processing S12 is a number of 2 or more, and is appropriately selected depending on the properties of the moving object, the time interval at which the position information can be obtained, and the like. In addition, here, it is assumed that the location information is received once every predetermined interval.However, if the location information is acquired at irregular intervals, the movement of the contractor can be performed using the reception time information included in the location information. You can check the speed. In this case, the counter is not necessary Further, the management server 25 acquires information on the error of the position information (S14), and determines whether or not the distance calculated in the processing S13 is within the range of the error (S15). If it is determined that the error is within the range of the error, it is determined that the contractor has not moved, and the search identifier is associated with the terminal identifier of the command terminal 5 related to the command, and the like (S16). A signal indicating that the association has been made is output (S17), and the processing is completed ₍

On the other hand, if it is determined in the processing S 15 that the distance is not within the range of the error, the contractor determines that the vehicle is moving, and outputs a signal indicating that the search should be reserved (S 18). Complete the process.

In other words, in this case, when the contractor is moving at a speed higher than the predetermined speed, it is difficult to identify the destination to search, and when the contractor is moving, Judge that the search is not possible, otherwise judge that the search is possible.

Here, a case has been described where it is determined whether or not to suspend the search based on the error range. However, a predetermined distance (for example, 4 km) and a predetermined time (for example, 60 counts = 5 minutes) are set in advance. After the distance is calculated in step S13, it is determined whether or not the distance exceeds the predetermined distance, and a signal indicating that the search is to be held if the distance is exceeded is determined. It may be output.

(9) Operation

Next, the operation of the command support system according to the present embodiment will be described. First, during normal times (before issuing a search command), each transmitting terminal 6 transmits its current position to the position information processing device 1, and the position information processing device 1 manages the history of this current position. The worker in charge carries out initial setting of the command terminal 5 using the office terminal 3 of the office to which one belongs. In addition, information indicating the work status is input to the command terminal 5. The input of this work status is, for example, “Patrol (P)”, “Taking measures (T>)”, “Taking measures (T)”, “Taking measures (W>)”, “Waiting”

(W) ”. Then, the command terminal 5 transmits the current position, the measurement time, and the information of the work status to the position information processing device 1 and the command device 2, and the position information processing device 1 accumulates the information.

Each of the terminals 5 and 6 also notifies the position information processing device 1 of information on the number of GPS signals and CDMA signals used for detecting the respective position information, and the position information processing device 1 The error information is calculated and stored based on the information of the signal from which the position information was detected.

The command device 2 generates a command identifier by receiving a signal indicating that the emergency button has been pressed from the transmitting terminal 6 or by a request from a person related to the contractor, and generates a command identifier according to the request. Associate a contractor identifier. Then, the contractor identifier and the request for the current position of the originating terminal 6 associated therewith are transmitted to the position information processing device 1 o

Also, the terminal identifier set in the control console 22 and the position monitoring console 23 of the person in charge of the command and the request for the current position of the command terminal 5 identified by the terminal identifier are sent to the position information processing device. Send to one.

Then, the position information processing device 1 responds to these requests, and the history of the current position of the transmitting terminal 6 that has been searched through the network, the information of the current position of each command terminal 5 and the command terminal The information of the work status of the worker in charge of 5 is transmitted to the command device 2.

The commanding device 2 receives the information and identifies the commanding terminal 5 located near the current position of the calling terminal 6 to be searched. From among these, the commanding device 5 further waits (W) and patrols (P ), The command terminal 5 in the work state of (W>) which is heading for standby is selectively highlighted and displayed on the control console 22 as a candidate for the command destination. The current position is superimposed on the map image and displayed on the position monitoring console 23. By viewing the highlighted command terminal 5, the commander can easily determine to which command terminal 5 the command should be issued. At this time, the command device 2 also acquires error information (preferably rank information) on the information of the current position of the calling terminal 6 searched for from the position information processing device 1, and obtains the error information. If is equal to or higher than a predetermined rank (for example, if the rank is the above-mentioned rank D), a command is displayed on the command terminal 5 to reserve the search command. If this error information is rank B or rank C, the number of command ends that should issue a command is displayed according to each. For example, rank B displays two command terminals 5 and three command terminals 5 display commands to be issued.

Then, the commander specifies at least one command terminal 5 to issue the command. And obtains and refers to the history of the location information of the calling terminal 6 to be searched, calculates the distance traveled by the search target subscriber within a predetermined time, and calculates the distance indicated by the error information. If it is within the box, the specified terminal identifier of the command terminal 5 is associated with the command identifier, and the command identifier is transmitted to the command terminal 5 of the corresponding terminal identifier. In this way, the identifier of the contractor to be searched and the terminal identifier of the person in charge of the search operation are associated with the command identifier. The set of the associated command identifier, contractor identifier, and terminal identifier is transmitted to the position information processing device 1. If the calculated distance is out of the range indicated in the error information, the search is suspended.

On the other hand, when the command terminal 5 receives a command together with the command identifier from the command device 2, it notifies the worker in charge of the command. Then, the worker refers to the instruction identifier and requests the position information processing device 1 for the current position of the transmitting terminal 6 to be searched and the current position of the worker to search jointly.

The position information processing device 1 receives and manages a set of a command identifier, a contractor identifier, and a terminal identifier. Then, when a request is received from the command terminal 5 together with the command identifier and the terminal identifier, it is checked whether or not the terminal identifier of the command terminal 5 that has made the request is associated with the command identifier. Requesting information of the current position of the transmitting terminal 6 corresponding to the contractor identifier and the current position of the command terminal 5 (current position of the joint searcher) identified by the terminal identifier associated with the command identifier Send to command terminal 5.

The command terminal 5 accumulates such information in the storage unit 55, determines the area and scale of the map data to be obtained based on the relative positional relationship, and sends the information to the position information processing device 1 based on the determination. Request transmission of map data. Note that the command terminal 5 may also acquire information on the error in the positional information of the transmitting end 6 that is attached to the subscriber who is the search target and display how much error there is. In this case, for example, it is preferable to draw and display a circle whose radius is the maximum error.

Further, as shown in FIG. 11, the command terminal 5 wants to communicate with the position information processing device 1 by using the PPP (Point to Point Protocol) with the TCP / IP protocol and acquire position information. Sometimes, the IP address of the operation server 13 of the position information processing device 1 (corresponding to the positioning server of IP = aaa in FIG. 11) is obtained, and the operation server 13 To obtain the location information (positioning sequence), and then obtain the IP address of the location monitoring server 14 (the positioning server with IP = bbb in Fig. 11) and obtain the location information from the location monitoring server 14 May be obtained.

In response to the request for the map data, the position information processing device 1 extracts the map data from the map server 12 and transmits the map data to the requesting terminal 5. Then, the command terminal 5 displays the map data, and superimposes the map data on the map data to display the current position of the search target person and the current position of the user. This clarifies the relative relationship between the search target and the current position of the user. Then, the operator starts the search operation, and operates the command terminal 5 to change the operation state to “toward the response (T>)”. This change is transmitted to the position information processing device 1 and the command device 2 via the mobile phone base station 4.

Eventually, the worker finds the contractor who was the target of the search, and when the search is completed, the worker inputs and sets “under treatment (Ding)”. This setting is also transmitted to the position information processing device 1 and the command device 2 via the mobile phone base station 4. Then, the search target is delivered to the requestor or accompanied to an appropriate place, and when the response is completed, a report to that effect is made, and the command terminal 5 is sent to “wait (W>)”. Or, input the work status such as "Patrol (P)".

By the way, when the command terminal 5 is stolen, the worker informs the commander of the command device 2 that the command terminal 5 has been lost. Then, the commander registers the terminal identifier of the command terminal 5 in the loss management server 24 and sets the loss. Then, the command device 2 transmits an instruction to delete the content stored in the storage unit 55 to the command terminal 5 having the terminal identifier at a predetermined interval. If the terminal identifier is associated with any one of the command identifiers, the command device 2 releases the terminal identifier, and notifies the position information processing device 1 of the release.

In this case, each time the position information processing device 1 receives a request from the command terminal 5, the position information processing device 1 checks whether the terminal unidentifier of the command terminal 5 related to the request is registered in the loss management server 24, and performs registration. If so, it is preferable to transmit an instruction to delete the content stored in the storage unit 55 without responding to the request.

Here, the person who has stolen or found the command terminal 5 requests the current position of the transmitting end 6 that is associated with the command identifier in accordance with the content stored in the storage unit 55. Then, since the terminal identifier of the lost command terminal 5 is no longer associated with the command identifier, the position information processing device 1 is not provided with information on the current position. At this point, when the position information processing apparatus 1 transmits an instruction to delete the storage unit 55, the contents of the storage unit 55 of the command terminal 5 are deleted here, and security can be maintained.

Furthermore, if the command terminal 5 is maliciously stolen, the power of the command terminal 5 is turned off until the radio terminal of the mobile phone base station 4 comes out of the area where the radio wave arrives, and the radio wave of the mobile phone base station 4 reaches When it comes to a place where it does not work, it may be possible to turn on the power of the command terminal 5 and attempt to steal the contents, but in this case, a predetermined time has elapsed due to internal processing of the command terminal 5. In this case, the contents of the storage unit 55 are erased, thereby preventing the security from lowering due to plagiarism.

In the above description, the case where the mobile subscriber is searched using the transmitting terminal 6 has been described.However, even when an instruction to deal with a fixed place such as a house is issued, an instruction is given. Similar processing can be performed.

(11) Provision of information

In this manner, when the search is used, the position information processing apparatus 1 receives access from a person having a predetermined relationship with the contractor through the network, and It is also preferable to provide the contractor's location information.

In this case, the person is authenticated based on information such as a password set in advance, and the location information of the relevant contractor is provided after the authentication. Industrial applicability

As described above, the command support system according to the present invention is useful when executing commands in consideration of the situation of each person in charge, such as commands in search operations.

Claims

The scope of the claims

1. A command support system comprising: a command center device arranged on a center side for issuing a command to a person in charge; and a command terminal possessed by each of the persons in charge,

Means for acquiring information on the current position, means for managing information on the current work status of the person in charge, and means for transmitting the information on the current position and the work status to the command center device And

The command center device includes: a unit that manages the current position of each command terminal received from the command terminal of each person in charge and information on the work status of the person in charge; and when issuing a command, the current position of each terminal. Means for selecting a candidate for a command terminal to which a command is to be transmitted with reference to the information on the work status of the person in charge and a command support system _c.

2. Command terminal carried by the person in charge,

Means for acquiring information on the current position, means for managing information on the work status of the person in charge,

Means for transmitting the information on the current position and the information on the work status of the person in charge to the command center device;

Means for receiving a command from the command center device and acquiring the content of the command from the command center device;

A command terminal comprising:

3. Means for acquiring information on the current position and the work status of the person in charge from the command terminal carried by each person in charge,

Means for selecting a candidate for a command terminal to which the command is to be transmitted, based on the acquired information on the current position and the work state, when issuing the command;

A command center device comprising:

4. The command center device according to claim 3, wherein

The means for selecting a candidate for the command terminal includes a preliminary terminal for selecting a command terminal within a predetermined range near the position related to the command based on the information on the position related to the command and the acquired current position of the command terminal. Selecting means;

Main selection means for selecting a command terminal to which a command is to be transmitted, from the command end selected by the preliminary selection means and further referring to information on the work status of the person in charge;

A command center device comprising:

5. A command support system comprising: a command center device arranged on the center side for issuing a command to a person in charge; and a command terminal possessed by each of the persons in charge,

The command terminal,

It manages a preset unique identifier,

Means for obtaining information on the current position;

Means for managing information on the current working status of the person in charge;

Means for transmitting the terminal identifier, the current position, and the information on the work state to the command center device;

Means for receiving a notification of a command from the command center device and acquiring the work content related to the command,

The command center side device,

Means for receiving and managing the terminal identifier, current position, and information on the work status of the person in charge from the command terminal;

Means for selecting a candidate for a command terminal to which a command is to be transmitted by referring to the current position of each terminal and information on the work state of the person in charge when issuing a command;

Means for registering the terminal identifier of the command terminal to be sent the command selected from the command terminal candidates by the person in charge at the center side and the information of the work content related to the command to be issued in association with each other;

Means for transmitting the information of the work content to the command terminal when the terminal identifier before the command terminal is associated with the information of the work content when a request for the work content is received from the command terminal side.

A command support system characterized by the following.

6. A command support system that assists in selecting a person to search for a moving object to be searched from among a plurality of persons on the move. Side terminal, a command terminal possessed by each person in charge, and a command center device arranged on the server side for giving a command to the person in charge,

The command center device,

Means for acquiring the current location information from the target terminal;

Means for acquiring the current position information and work status information of each person in charge from each command terminal, and managing the information as dynamic information of each person in charge;

Preliminary selection means for referring to the dynamic information of each person in charge and selecting persons in a predetermined range near the current position of the target terminal accompanying the search target;

A main selecting means for referring to the information on the working state of the person in charge from the dynamic information of the person in charge selected by the preliminary selecting means, and further selecting a person to instruct a search. A command support system, wherein a search command is transmitted to a command terminal of a person in charge of the search.

7. In the command support system described in claim 6,

At least one end of the target terminal and the command terminal is used to detect its current position.

Means for receiving a GPS signal from a GPS satellite;

Means for acquiring information related to a plurality of base stations in the vicinity of the base station constituting the cellular network;

Means for transmitting the GPS signal and information on a base station to the location calculation center device;

A command support system, wherein position information of the terminal is calculated based on at least one of a received GPS signal and information on a base station.

8. In the command support system described in claim 7,

At least one of the non-target side terminal and the non-command side terminal receives all receivable GPS signals among the GPS signals coming from a plurality of GPS satellites orbiting the satellite orbit,

When the number of the receivable GPS signals is equal to or more than a predetermined number, a means for controlling so as not to acquire information related to the base station is provided.

A command support system, wherein position information of the terminal is calculated based only on the plurality of GPS signals.

9. In the command support system described in claim 7,

The target terminal and at least one terminal not having a command terminal receive all receivable GPS signals among the GPS signals coming from a plurality of GPS satellites orbiting the satellite orbit,

When the number of receivable GPS signals is equal to or more than 1 and less than a predetermined number, a means for controlling so as to acquire information related to the number of base stations corresponding to the number is provided, and the location information of the terminal is A command support system, which is calculated based on a calculated GPS signal and information on a base station.

10. In the command support system according to claim 7,

At least one of the target terminal and the command terminal receives all receivable GPS signals among GPS signals arriving from a plurality of GPS satellites orbiting the satellite orbit,

If there is no receivable GPS signal, a means is provided for controlling to acquire information relating to a plurality of obtainable base stations,

A command support system, wherein position information of the terminal is calculated based on information on a base station.

11. In the command support system according to any one of claims 7 to 10,

Upon receiving the position information from at least one of the target terminal and the command terminal, the center-side device generates information on a GPS satellite that is transmitting a GPS signal that can be received at the position, and generates the generated information. A command support system characterized by transmitting information to the terminal.

1 2. In the command support system according to any one of claims 7 to 11,

The center-side device acquires information on the number of GPS signals received by the terminal, generates error information based on the information on the number, and provides the error information to a process for providing position information or a search command. Command support system characterized by:

1 3. In the command support system according to any one of claims 6 to 12,

The center device,

Means for detecting a time change of the current position information of the target side terminal and calculating a moving distance of the search target;

Means for controlling so as to suspend transmission of the search command when the search target has moved a predetermined distance or more within a predetermined time;

A command support system comprising:

14. In the command support system according to any one of claims 7 to 11,

The target terminal receives all of the receivable GPS signals among the GPS signals coming from a plurality of GPS satellites orbiting the satellite orbit,

The center-side device obtains information on the number of GPS signals received at the end, and generates error information based on the number of information;

Means for determining whether or not the change in the current position of the target side terminal is within the range indicated by the generated error information;

Means for controlling so as to suspend transmission of a search command when the search target moves by a predetermined distance or more within a predetermined time and the travel distance exceeds a range indicated by the error information;

A command support system comprising: