JP2002335552A - Locating and capturing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that in the case that the location of a terminal attached on a body is calculated from a cell structure using a mobile communication system, and a searcher tries to connect the terminal in a non-public mode from the calculated location, and once a connection is established, the location is obtained and captured with a directional antenna or the like of the searcher, if there is a large calculation error, initial connection is difficult to establish or a terminal is required to have an exclusive automatical responding terminal in the non-public mode. SOLUTION: The use of a position searching and capturing system is not limited to the connection in a non-public mode, but is extended to communication between the terminal to be searched in a public mode. The location can be searched for and captured even in a communication process until a connection is established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object search / capture system using a mobile communication system, and more particularly to various types of communication between a mobile terminal and a terminal to be searched held by a target. And search and capture systems.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 9-261 discloses a similar technique.
At 720, the inventor has determined that the searcher is the terminal to be searched (PHS slave)
In the transceiver mode, a call is made in a transceiver mode, and a directional antenna of a searcher is used to detect the direction of arrival of radio waves of a terminal to be searched while approaching and capturing. With this technology, the PHS transceiver mode communication distance (nominal 100 meters, ability 200 meters)
In principle, searching from a distance is impossible, and if the location search system provides a large error in searching for the location of the terminal to be searched, the searcher must repeat the transceiver call to sweep the range of the error. take time.

Searching in the transceiver mode does not incur a communication fee to be paid to a communication carrier, but the standby mode of the terminal to be searched needs to be in a mode capable of detecting an incoming call in the transceiver mode, for example, a public / transceiver standby mode. is there.

[0004] Further, if the object to be searched cannot be operated for response due to the elderly with dementia or valuables, the transceiver
An automatic answer function for mode incoming calls is required.

Therefore, a search in the transceiver mode requires a dedicated terminal to be searched.

As means for solving the problem that the transceiver communication range of the above technology is short, Japanese Patent Application No. 2000-1 is disclosed.
In 01569, the present inventor proposes a technique for searching and capturing in transceiver mode in combination with public mode. In this technique, a dedicated terminal to be searched which has been modified from software (firmware) built in the terminal to be searched is required.

[0007]

PROBLEM TO BE SOLVED [Problem 1] A search / capture can be easily performed even if the error of the searched terminal location information provided by the location search system is large.

Problem 2 A mobile terminal compatible with an ordinary position search system can be used as a searched terminal without modifying built-in software.

[0009]

Means 1: A terminal (hereinafter referred to as a terminal to be searched) of a system installed in a target to be searched / captured (hereinafter, referred to as a terminal to be searched) is used or used by using or using a public mobile communication system. In the position search / capture system, the searched terminal has means for automatically responding to an incoming call (transmission and reception of data by circuit switching or / and packet communication: hereinafter referred to as position search reporting means),
The system calculates the position of the terminal to be searched based on the response, or receives the notification of the positioning value of the attached positioning device, and has means for providing the position information, and also has the following means. A position search and capture system is used. 1. Means for providing a search terminal function at the provided position of the searched terminal or in the vicinity thereof, and calling and communicating with the searched terminal (including a series of sequences up to establishment of an information channel and / or packet or circuit-switched data communication). 2. A wireless carrier number assigned or assigned to a terminal that is communicating at least in the vicinity (including information channel, link establishment, service channel establishment, communication channel switching (same CS: cell station / other CS), etc.) , T
Receiving means for searching for a DMA time slot number, a CDMA spreading code, etc. (hereinafter referred to as communication connection conditions). 3. A means for detecting a terminal under search by the search receiving means and knowing a communication connection condition thereof. 4. A reception function (hereinafter, referred to as a search and capture reception function) connected to a directional and / or omnidirectional antenna that enables reception of transmission of the communication connection condition from the terminal to be searched is provided. Means to capture.

Means 2: In the means 1, the search receiver is provided with a search terminal function, and means for calling and calling the searched terminal and / or has a search and capture reception function. Use the system.

Means 3: In the means 1, the search receiver is dedicated to reception, and the search terminal is a normal terminal of the mobile communication system and / or a normal terminal to which directivity is added. Is used.

Means 4: In the means 1, Effective sensitivity (carrier detection level) including antenna gain of search reception function and / or search and capture reception function
Cover the calculation error of the position calculation system. 2. A position search / capture system characterized in that the carrier detection level of the search reception function can be changed according to the characteristics of the area to be searched.

Means 5: In the means 1, the means for knowing the communication connection conditions of the terminal to be searched is a series of sequences such as link establishment and service channel establishment leading to information channel establishment by the search reception function, and / or channel switching communication during communication. A position search / capture system characterized by being interception (monitor) of an object is used.

Means 6: A position characterized by searching for and capturing a terminal (hereinafter referred to as a terminal to be searched) of the system installed on the target to be searched / captured by using or using a public mobile communication system. In the search / capture system, the searched terminal has means for automatically responding to an incoming call (such as data transmission / reception by circuit switching or / and packet communication: hereinafter referred to as position search reporting means). Position search / capture, characterized in that it has means for calculating the position of the search terminal or receiving the notification of the positioning value of the attached positioning device and providing the position information, and also having the following means: Use the system. 1. At or near the provided location of the terminal to be searched, a search terminal function is provided to request a position search system that provides a position calculation result and / or a positioning value to call the terminal to be searched and perform communication (a series of steps up to the establishment of an information channel). And / or packet or circuit-switched data communications). 2. A position search system that provides position calculation results and / or positioning values exercises the position searching means (communicates with the terminal to be searched for obtaining data or position values for position calculation) and / or in particular, in a pseudo manner. Means for adding a special communication (idle burst, synchronization burst, negative acknowledgment, retransmission request, etc.) to extend the communication time and to know the communication connection conditions used by the searched terminal for transmission to a public base station or the like. 3. A reception function (hereinafter, referred to as a search and capture reception function) connected to a directional and / or omnidirectional antenna that enables reception of the communication connection condition from the terminal to be searched is provided to perform direction detection and search. Means to capture.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, terms used in the present specification will be defined. What is Mobile Communication System TDM
A mobile communication system using a cell structure, such as PHS / mobile phone of A / CDMA / WCDMA mobile phone, satellite communication system, broadcast wave multiplexing system, pager (pager (registered trademark)) system, taxi wireless system, etc. It is within the scope of the present invention. The present invention is applied to both a system for positioning by the mobile communication system itself, a system using a positioning device such as GPS, and a system using both of them because there are problems such as a limited area where positioning is possible and a large error. Range. Hereinafter, an example of the PHS system will be described, but the present invention is not limited to this.

A position search system is a conventional type of position information system having no search / capture function, a system for performing positioning by the mobile communication system itself, a system using a positioning device such as GPS, and both. System is this.

The public mode is a communication mode between unspecified large numbers of people (public) mainly for mobile communication.

The non-public mode is a communication mode between other specific persons, for example, a PHS transceiver (direct between slave units) communication and a cordless extension communication.

Next, FIG. 1 will be described. This figure is a diagram showing the concept of the system of the present invention. 1 in the figure is NTT
This is a location search system based on the PHS cell structure provided by DoCoMo and Toshiba Location Info. It uses a GPS / mobile phone combined location search system (such as Cocosecom) provided by SECOM, etc., and detects the difference in the time of arrival of radio waves from multiple base stations. The location search system used may be used.

In the figure, reference numeral 2 denotes a DDI pocket or NTT DoC
oMo is a public PHS communication network, but TDMA and WC
A mobile phone network of the DMA system may be used.

In FIG. 3, reference numeral 3 denotes a communication connection condition search function indispensable for the present invention. Specifically, a PHS35C type field analyzer manufactured by Shibasoku Co., Ltd. or the like is used.

In the figure, reference numeral 4 denotes a terminal to be searched for a PHS (model number L) for a position search system provided by Toshiba Location Info.
S201) and PHS (model number DL-S28L) for callable location search system, P-doc of NTT DoCoMo
o? Are used.

In the figure, reference numeral 5 denotes a search terminal function, which can be realized by a normal PHS-PS (portable mobile station), as long as the terminal to be searched can be called and communicated in the public or non-public mode.

In the figure, reference numeral 6 denotes a search / capture reception function which has a directional antenna and / or an omnidirectional antenna and has at least one system which can tune in to a specified communication connection condition (radio carrier number and time slot) and receive standby. Is preferably composed of five receivers. In the case of the simplest one-system receiver, the normal PH used for the search terminal function of 5
The S-PS receiving unit may be shared, and a directivity adding unit may be attached when directivity is required for the direction search.

Ideally, the reception electric field strength (RS) of four receivers having directivity in four directions in front, rear, left and right directions while continuously capturing radio waves from the terminal to be searched by one system of non-directional receivers
It is desirable to configure the receiver with five receivers that simultaneously display SI).

In the figure, A is a position search system (1) and the public P
A wired line such as an ISDN is mainly used as a wired and / or wireless communication line between the HS communication networks (2). B is a logical path for information exchange between the search terminal function (5) and the position calculation system (1), and physically uses a public PHS network, a mobile phone network, a taxi radio, an MCA radio, or the like.

In the figure, C is a wireless communication link between the PHS-PS used as the search terminal function (5) and the public PHS communication network (2), and D is the public PH received by the search reception function.
Radio waves from the S communication network (2).

In the figure, E is a wireless communication link between the terminal to be searched (4) and the public PHS communication network (2), and F is a terminal to be searched which is received by the search receiving function when the search target is in the non-public mode. 4) Radio waves from.

In the figure, G is a path for notifying the search and capture receiving function (6) of the communication connection conditions of the searched terminal (4) found by the search and receiving function (3). Bus) and RS232.

In the figure, H is a radio link used when the searched terminal (4) is communicating in the non-public mode, and I is a radio wave received by the search and capture receiving function (6) when searching for directions.

Hereinafter, embodiments will be described. In the case of PHS, the means for providing location information in the means 1 includes a CSID (cell base station identification code) of a CS group detected by the searched terminal at the time of location registration, and a received signal strength (RSS) of each CS.
CSID and RSSI accompanying recording and movement of I)
The location retrieval system (1) siphons the updated value of the terminal whenever necessary, calculates the location of the terminal to be searched by a locus algorithm or the like, and provides the user with the latitude and longitude in principle.

Since the calculation result sometimes includes an error ranging from several hundred meters to one kilometer, it is extremely unlikely that the object to be searched can be found and captured even when the user goes to the calculation position.
In order to find and capture the object, it is necessary to approach the object to be searched at least to a distance at which the object can be visually confirmed while approaching the object.

As this search and approach means, Japanese Patent Application Laid-Open No. 9-261720 and Japanese Patent Application No. 2000-10 described in the prior art section.
The technique proposed by the present inventor in 1569 is that the searcher and the terminal to be searched are in a transceiver communication state, and the direction of arrival is determined based on the strength of the radio signal received from the terminal to be searched in each direction by the directional antenna of the searcher. To search for and approach. This search technology has the advantage that it does not require the communication cost to be paid to the telecommunications carrier, but on the other hand, the communicable distance in the transceiver mode is about 100 to 200 meters, which is shorter than the position calculation error described above. It may not be easy even to put the machine and the terminal under test into a transceiver call state.

On the other hand, PH including the terminal to be searched in the public mode
The communicable distance with the S-PS is unlimited as long as it is within the service area of the communication carrier used, and the searched terminal usually has a plurality of CSs from the position where it is calculated that it is located.
Can communicate with

In the means 1 of the present invention, the following means are used in combination. 1. The terminal to be searched (4) is called in a public mode from a terminal (PHS-PS) having a search function (5) at or near the calculation position, which may be circuit switching or packet communication.

2. The field analyzer used as the search reception function (3) scans the radio channel assigned to the PHS sequentially and sequentially performs the CSID and P
When the SID is found, it stays on the wireless channel and displays / outputs information such as the wireless carrier number, time slot number (communication connection condition) and received signal strength, and the designated wireless carrier number and time slot number It has the function of monitoring

3. Using the above search function, P
It goes without saying that the communication connection condition of the searched terminal can be known by specifying the SID and performing the search.
Needless to say, it can be performed in the public mode or the non-public mode.

4. The reception function with the directional antenna connected is tuned to the communication connection conditions of the terminal to be searched obtained above (the setting of the frequency synthesizer that determines the reception frequency of the receiver and the reception of the slot number extracted from the TDMA frame decomposition processing LSI) The built-in microcomputer adjusts to the communication connection conditions) so that the target terminal can receive the transmitted radio wave during communication, and approaches the target terminal while searching for the direction of arrival of the radio wave from the received signal strength for each direction. Capture.

The means 2 will be described. A function similar to the transmitting section of the PHS-PS is added to the field analyzer used as the search reception function described in the means 1 to make the search terminal function, and the scan of the search reception function is performed when the PSID of the searched terminal is detected. If it is controlled so that the reception state is maintained and the received signal strength thereafter is updated and displayed as quickly as possible (usually updated every 1.2 seconds) and the directivity is given to the antenna, A search and capture receiving function can be provided.

The field analyzer has two or more receiving units, preferably one omnidirectional system and four systems having directivity in front, rear, left and right, and five convenient systems. The first system is connected to an omnidirectional antenna, and the second system is connected to the second system. A directional antenna is connected after the system, and the first system is used mainly for search (scan) and communicability after detection of the searched terminal, and for monitoring the searched terminal such as handover. By tuning in synchronization with the detected communication connection condition of the searched terminal, it is possible to know in a shorter time which direction to proceed at an intersection or the like during the search. By integrating each function, there is also hardware and software that can be shared by each function, so that the search / capture system can be reduced in size and weight and cost can be reduced.

Next, the means 3 will be described. The field analyzer used as a search reception function is, in principle, dedicated to reception. In order for the searched terminal to be in communication, the called terminal is called via the public network, a link channel is allocated from the CS and a transition is made to the service channel establishment phase, or a call is made in the transceiver mode and a synchronization message with the searched terminal is sent. May be set in the transfer state. Therefore, it is needless to say that the search terminal function can be realized by a normal PHS-PS provided separately.

It is also possible to mount a directivity adding unit proposed by the present inventor in Japanese Patent Application Laid-Open No. Hei 9-261720 on a normal PHS-PS antenna to provide a search and capture function.

Means 1 of means 4 Is used to cover the position calculation error by increasing the effective reception sensitivity of the search reception function (3) and the search and capture reception function (5) of the means 1 with a high gain antenna or N
By employing a low-noise high-frequency amplifier (LNA) or the like having an excellent F, it is possible to receive radio waves emitted from the terminal to be searched from a distance far enough to cover a distance equivalent to a calculation error of the position search system. This means has an effect that the searchable / searchable / capturable distance is lengthened even in the transceiver mode (non-public mode) and the search / capture is facilitated even when the position calculation error is large.

Means 4 of Means 4 In advance, a database is created for areas such as urban areas where the CS installation density is high and quiet residential areas and rural areas where the CS installation density is low, and based on this information, the reception sensitivity of the search reception function (3) (stop scanning) The carrier sense level is controlled to be low in a city center or the like, and is controlled to be high in a rural area or the like to optimize the detection of a wireless carrier at the time of search. This has the effect of shortening the search time in a city center or the like.

The above-mentioned control of the receiving sensitivity is performed by the field analyzer used as the search receiving function (3), the function of changing the carrier sense level and the function of controlling the insertion of the attenuator between the antenna and the receiving front end. It can be controlled manually (button operation) or via USB (universal serial bus, RS232C, etc.), and this can be used.

The means 5 will be described. In the means 1, mainly after the link channel is allocated in the public mode,
The non-public mode, i.e., the transceiver mode, is assumed. In the public mode after the link channel is allocated, the number of radio carriers to be searched is large, and when the transmission quality of the information channel is deteriorated, the channel switching during communication (the same CS) is performed.
Handover (switching to another CS) occurs due to the movement of the terminal to be searched, etc., and the search must be repeated each time, and the efficiency of search / capture deteriorates.

On the other hand, the number of radio carriers used by a control channel is limited to about 1 or 2 as a standard of the PHS system.
Is defined to intermittently repeat transmission so as not to cause a collision, so that control channels of all CSs in the area can be intercepted (monitored).

The public mode link channel assignment (including handover to another CS) is executed using the control channel. Therefore, the PSID of the searched terminal in the link channel assignment message transmitted by the CS
By intercepting (monitoring) and decoding a message that includes "!", The terminal to be searched can quickly know the communication connection conditions to be shifted soon, and search / capture can be performed extremely efficiently.

Since the channel switching during communication within the same CS is performed using the service channel (including the information channel) currently being used, if a channel switching request message is received during the direction search, it is necessary to intercept the downlink slot from the CS. By transitioning and receiving the switching instruction, the searched terminal can quickly know the communication connection conditions to be transitioned sooner.
Capture can be continued without interruption.

It is needless to say that it is convenient for the means 5 to receive the information about the CSID having the higher use priority held by the searched terminal from the center (server) of the position search system.

The means 6 will be described. While the center of the location search system is exercising the location search information reporting means, it obtains the communication connection conditions of the searched terminal from the public PHS network at this time, notifies the search / capture system of the conditions, and provides a search / capture reception function. Captures approaching while searching for directions in synchronization with the notified communication connection conditions.

At this time, if extra data, for example, an idle burst or a synchronization burst is inserted from the center side, or a negative response is issued and data retransmission is repeatedly requested, time for detecting a direction can be obtained. Further, it is more convenient to disconnect the communication only from the center side.

As described above, the means 6 uses the function of returning the data of the position search reporting means and the pseudo data thereof of the ordinary PHS for position search to the center of the position search system, so that the object to be searched is called. There is no need to respond artificially to Further, since the communication connection condition of the searched terminal is notified from the center of the position search system, it is not necessary to search for the communication connection condition.

[0054]

As described above, in the present invention, the radio wave used for searching is not limited to the non-public mode (transceiver mode). If the user goes to the location of the terminal to be provided, even if the error is large, it is possible to obtain the necessary clues for the search (communication connection conditions of the terminal to be searched), and high-sensitivity search reception that is not restricted by the Radio Law. Since the function and the reception function for search and capture are used, search and capture can be easily performed. (Issue 1)

Further, since it is not necessary to enter the transceiver communication state and it is not necessary to answer the incoming call artificially in the public mode, the mobile terminal compatible with the ordinary position search system can be searched without modifying the built-in software. It can be used as a terminal. Further, a normal PHS-PS can be used as it is as a search terminal function. (Issue 2)

[Brief description of the drawings]

FIG. 1 is a diagram showing the concept of the system of the present invention.

[Explanation of symbols]

1. 1. Position search system 2. Public PHS communication network 3. Search reception function Terminal to be searched 5. Search terminal function 6. Search and receive function A. A communication line connecting the location search system and the public PHS communication network. B. Logical path for transmitting the information of the means 6 B. Wireless communication link between search terminal function and public PHS communication network E. Radio wave from public PHS communication network received by search reception function F. Wireless communication link between the terminal to be detected and the public PHS communication network Non-public mode radio waves from the searched terminal received by the search reception function. G. FIG. B. Path for notifying communication connection conditions to the search and capture reception function Wireless link used when the searched terminal is communicating in the non-public mode I. Radio waves received by the search and capture reception function when searching for directions

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Claims (6)

[Claims] Claims: 1. A location search characterized by using or using a public mobile communication system to search and capture a terminal (hereinafter referred to as a "searched terminal") of the system installed on a search and capture body. In the acquisition system, the searched terminal has a means for automatically responding to an incoming call (transmission / reception of data by circuit switching or / and packet communication, etc .: hereinafter referred to as a position search reporting means), and the system is searched for by the response. A position search / capture system having means for calculating the position of a terminal or receiving a notification of a positioning value of a side-by-side positioning device and providing the position information, and also having the following means: 1. Means for providing a search terminal function at the provided position of the searched terminal or in the vicinity thereof, and calling and communicating with the searched terminal (including a series of sequences up to establishment of an information channel and / or packet or circuit-switched data communication). 2. A wireless carrier number assigned or assigned to a terminal that is communicating at least in the vicinity (including information channel, link establishment, service channel establishment, communication channel switching (same CS: cell station / other CS), etc.) , T
Receiving means for searching for a DMA time slot number, a CDMA spreading code, etc. (hereinafter referred to as communication connection conditions). 3. A means for detecting a terminal under search by the search receiving means and knowing a communication connection condition thereof. 4. A reception function (hereinafter, referred to as a search and capture reception function) connected to a directional and / or omnidirectional antenna that enables reception of transmission of the communication connection condition from the terminal to be searched is provided. Means to capture. 2. The position search / capture according to claim 1, wherein the search receiver is provided with a search terminal function, and has means for calling and calling the searched terminal and / or a reception function for search and capture. system. 3. The search receiver according to claim 1, wherein the search receiver is dedicated to reception, and the search terminal is a normal terminal of the mobile communication system and / or a normal terminal to which directivity is added. A position search / capture system characterized by the following. 4. The method according to claim 1, Effective sensitivity (carrier detection level) including antenna gain of search reception function and / or search and capture reception function
The position search and acquisition system characterized in that the calculation error of the position calculation system is covered. 2. A position search / capture system characterized in that a carrier detection level of a search reception function can be changed according to characteristics of an area to be searched. 5. A communication system according to claim 1, wherein the means for knowing the communication connection condition of the terminal to be searched is a series of sequences such as link establishment and service channel establishment leading to information channel establishment by a search reception function, and / or channel switching communication during communication. Location search characterized by interception (monitor) of
Capture system. 6. A location search characterized by using or using a public mobile communication system to search and capture a terminal (hereinafter referred to as a “searched terminal”) of the system installed in the searched and captured body. In the acquisition system, the searched terminal has a means for automatically responding to an incoming call (transmission / reception of data by circuit switching or / and packet communication, etc .: hereinafter referred to as a position search reporting means), and the system is searched for by the response. A position search / capture system having means for calculating the position of a terminal or receiving a notification of a positioning value of a side-by-side positioning device and providing the position information, and also having the following means: 1. At or near the provided position of the searched terminal, a search terminal function is provided to request a position search system that provides a position calculation result and / or a positioning value to call the searched terminal and perform communication (a series of steps until the information channel is established). And / or packet or circuit-switched data communications). 2. A position search system that provides position calculation results and / or positioning values exercises position search means (communicates with a terminal to be searched for obtaining data or position values for position calculation) and / or particularly in a pseudo mode. Means for adding communication (idle burst, synchronization burst, negative acknowledgment, retransmission request, etc.) to extend the communication time to know the communication connection conditions used by the searched terminal for transmission to a public base station or the like. 3. A reception function (hereinafter, referred to as a search and capture reception function) connected to a directional and / or omnidirectional antenna that enables reception of transmission of the communication connection condition from the terminal to be searched is provided. Means to capture.