JP3501932B2 - Location management system and mobile station and base station used therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a location management system for managing the location of a mobile station using a simplified portable telephone system (PHS / C) using a CATV network as a transmission path, a mobile station used for the location management system, and It relates to base stations.

[0002]

2. Description of the Related Art With the advent of an aging society, a demented elderly person wanders around, which often makes it impossible to ascertain the location of the demented elderly person, and the family often has to search. In such a case, there is an increasing demand for a system that can automatically detect the position of a wandering person.

Conventionally, as a system for detecting the existing position of a moving body such as a vehicle, a position detecting device configured by using GPS or the like is mounted on the moving body such as a vehicle, and the position detecting device is used to detect the own position. To detect and manage. However, since these position detecting devices are large in size, consume a large amount of power, and are expensive, there is a practical limitation to possessing them by humans. Therefore, it is desired to be able to use communication devices other than the device dedicated to such position detection.

In a mobile communication system whose radio area is a microcell such as PHS, a large number of base station devices are installed due to a short radio wave propagation distance. Although the device can be used for position management of the moving body, on the other hand, enormous expense is required for securing a place for installing the base station device and laying a metal wire connecting the center exchange and the base station device.

[0005]

Therefore, it is desired to construct a position management system for wandering people at low cost by utilizing mobile communication technology such as a simple mobile phone system such as PHS. , Location management information of the mobile device used in this type of conventional mobile communication system is
It is used only to identify the base station device that relays to call the mobile device in the main device, and outputs it outside the main device to detect the location of the specific mobile device and collate it with map information. It is not configured to specify the location of the owner of the mobile device, etc. That is, since the location of the owner of the mobile device cannot be specified, it is not suitable for a location management system for wandering people.

Further, if a transmission line is to be newly laid with a metal wire in order to construct a position management system for a wandering person using the conventional mobile communication system, many people who use mobile communication will live in it. Determine the region,
Furthermore, after securing the installation place of the base station device, it is necessary to lay a metal wire between the main device and the base station device, which causes a problem that the installation cost becomes huge.

The present invention has been made in order to solve such a problem, and can be used as ordinary mobile communication, and a location management system and a location management system which can easily manage the location of a wandering person at low cost. The purpose of the present invention is to provide a mobile station and a base station to be used for.

[0008]

In order to solve the above-mentioned problems, the present invention provides a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system comprises: A main unit that manages exchange control and location information of a mobile station, and a bidirectional CATV for the main unit.
A plurality of base station devices connected via a network for relay control of communication with a plurality of mobile stations, and a signal time-division full-duplexed between the main device and each of the base station devices as an upstream signal. It has a parent transmission device and a child transmission device for separating into downstream signals and converting them so that they can be transmitted on a bidirectional CATV network. The parent transmission device intercepts an upstream signal to the main device and It is provided with an extracting means for extracting the position information of the mobile station included in the signal.

According to the present invention, the location management system can be used for ordinary mobile communication, and the location of a wandering person can be easily managed at low cost.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system is A main device that manages exchange control and position information of the mobile station; a plurality of base station devices that are connected to the main device via a bidirectional CATV network and relay control of communication between a plurality of mobile stations; A parent transmission device and a child transmission device for separating a time-division full-duplex signal between a main device and each of the base station devices into an upstream signal and a downstream signal for conversion so that they can be transmitted on a bidirectional CATV network. And the parent transmission device comprises an extracting means for intercepting an upstream signal to the main device and extracting the position information of the mobile station included in the upstream signal, of the presence position of the wandering person or the like. Easy to build management system at low cost It has the effect of that.

The invention according to claim 2 of the present invention further comprises signal processing means for detecting the location of the mobile station by processing the location information extracted by the extraction means. Has the effect of being able to detect

According to a third aspect of the present invention, the extraction means generates a unique word for identifying the beginning of a signal forming an upstream transmission signal including position information, and a main device. And a receiving unit for receiving an upstream signal between the base station device and a unique word for identifying the beginning of the upstream signal received by the receiving unit and the unique word generated by the unique word generating unit, and when they match, The present invention is provided with a selection unit that selects only the position information and outputs it to the signal processing unit when there is no error, and has an effect that the position information of the carrier who carries the mobile device can be reliably detected.

According to a fourth aspect of the present invention, the extraction unit has a memory unit for temporarily storing the position information selected by the selection unit and a data rate at which the position information temporarily stored in the memory unit can be processed. conversion to are those further comprising a speed conversion section to be output to the signal processing unit, an effect that can be converted location information to the processable data rate signal processing unit.

According to a fifth aspect of the present invention, the signal processing means sequentially calls the position information of the mobile station from a plurality of extraction means when necessary, whereby the positions of the mobile station and a plurality of base station devices are located. The configuration is such that the time elapse of communication of information is determined, and has an effect of being able to determine the time elapse of communication of position information of the mobile station and the base station device.

According to a sixth aspect of the present invention, there is provided a mobile station for a position management system using a simple mobile phone system having a bidirectional CATV network as a transmission path, wherein the simple mobile phone system is A main device that manages exchange control and position information of the mobile station; a plurality of base station devices that are connected to the main device via a bidirectional CATV network and relay control of communication between a plurality of mobile stations; A parent transmission device and a child transmission device for separating a time-division full-duplex signal between a main device and each of the base station devices into an upstream signal and a downstream signal for conversion so that they can be transmitted on a bidirectional CATV network. The parent transmission device includes an extracting unit that intercepts an upstream signal to the main device and extracts the position information of the mobile station included in the upstream signal, and can detect the existing position of the mobile station. The action of being able to provide a mobile station To.

According to a seventh aspect of the present invention, there is provided a mobile station for a position management system using a simple mobile phone system having a bidirectional CATV network as a transmission path, wherein the position information extracted by the extracting means is used. Is further provided with signal processing means for detecting the location of the mobile station by processing the above, and has the effect of providing a mobile station capable of detecting the location of the mobile station.

According to an eighth aspect of the present invention, there is provided a mobile station for a position management system using a simple mobile phone system having a bidirectional CATV network as a transmission path, wherein the extracting means extracts the position information. A unique word generation unit that generates a unique word for identifying the beginning of the signal that constitutes the upstream transmission signal that includes the reception unit that receives the upstream signal between the main device and the base station device, and the reception unit Comparing the unique word for identifying the beginning of the upstream signal with the unique word generated by the unique word generating section, and including a selecting section for selecting only position information and outputting it to the signal processing means when they match and there is no error Therefore, there is an effect that it is possible to provide a mobile station that can reliably detect the position information of the carrier who carries the mobile device.

According to a ninth aspect of the present invention, there is provided a mobile station for a position management system using a simple mobile phone system having a bidirectional CATV network as a transmission path, wherein the extracting means is a selecting section. a memory unit for temporarily storing the selected position information, which further comprising a speed conversion section to be output to the signal processing means converts the positional information temporarily stored in the memory unit can be processed data rate, positional information has an effect of a can provide a mobile station that can be converted into processable data rate signal processing unit.

According to a tenth aspect of the present invention, there is provided a mobile station for a position management system using a simple portable telephone system having a bidirectional CATV network as a transmission path, wherein a plurality of signal processing means are provided. The position information of the mobile station from the extracting means is sequentially called when necessary to determine the time lapse of the communication of the position information of the mobile station and the plurality of base station devices. This has the effect of providing a mobile station that can determine the passage of time of the communication of the position information of the station device.

According to an eleventh aspect of the present invention, there is provided a base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system is A main device that manages exchange control and position information of the mobile station; a plurality of base station devices that are connected to the main device via a bidirectional CATV network and relay control of communication between a plurality of mobile stations; A parent transmission device and a child transmission device for separating a time-division full-duplex signal between a main device and each of the base station devices into an upstream signal and a downstream signal for conversion so that they can be transmitted on a bidirectional CATV network. The parent transmission device comprises an extracting means for intercepting an upstream signal to the main device and extracting position information of the mobile station included in the upstream signal, and detecting the existing position of the mobile station. Can provide a base station that can Having an iodine.

According to a twelfth aspect of the present invention, there is provided a base station for a position management system using a simple portable telephone system having a bidirectional CATV network as a transmission path, wherein the position information extracted by the extracting means is used. Further comprising signal processing means for detecting the location of the mobile station by processing
This has the effect of providing a base station that can detect the location of a mobile station.

According to a thirteenth aspect of the present invention, there is provided a base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extracting means extracts the position information. A unique word generation unit that generates a unique word for identifying the beginning of the signal that constitutes the upstream transmission signal that includes the reception unit that receives the upstream signal between the main device and the base station device, and the reception unit Comparing the unique word for identifying the beginning of the upstream signal with the unique word generated by the unique word generating section, and including a selecting section for selecting only position information and outputting it to the signal processing means when they match and there is no error Therefore, there is an effect that it is possible to provide a base station capable of surely detecting the position information of the carrier who carries the mobile device.

The invention according to a fourteenth aspect of the present invention is a base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extraction means is a selection unit. a memory unit for temporarily storing the selected position information, which further comprising a speed conversion section to be output to the signal processing means converts the positional information temporarily stored in the memory unit can be processed data rate, positional information has an effect of a can provide a base station that can be converted into processable data rate signal processing unit.

A fifteenth aspect of the present invention is a base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein a plurality of signal processing means are provided. The position information of the mobile station from the extracting means is sequentially called when necessary to determine the time lapse of the communication of the position information of the mobile station and the plurality of base station devices. This has the effect of providing a base station that can determine the passage of time of the communication of the position information of the station device.

FIG. 1 shows an embodiment of the present invention.
~ It demonstrates using FIG.

FIG. 1 is a block diagram showing the configuration of a position management system using a simplified portable telephone system having a bidirectional CATV network as a transmission path according to an embodiment of the present invention.
In the figure, 101 is a main device that manages exchange control and location information of mobile devices such as PHS, and this main device 101 does not interfere with main transmission device 111 and CATV image information with main device 101. Headend 112 to send
A coaxial line 10 for CATV which constitutes a transmission medium via
Connected to 2. The master transmission device 111 is connected to a signal processing device 100 that receives position information that a mobile station communicates with a base station that the mobile station relays to communicate with the main device 101, and processes the position information. In addition, the coaxial line 102,
A main line amplifier 103 for interpolating the attenuation amount of the coaxial line 102 is interposed.

In FIG. 1, 104 and 105 are distributors which are connected to the coaxial line 102 and take out a necessary signal from the coaxial line 102. The distributors 104 and 105 are provided with:
Base station devices 106 and 107 are connected via child transmission devices 113 and 114, respectively. Base station device 10
6, 107 are the main device 101 and the mobile device (mobile station) 108,
Relay control of communication between 109 and 110. The mobile units 108, 109, 110 can be carried by a wandering person or the like, and also function as a normal PHS mobile unit.

FIG. 2 is a block diagram showing the internal configuration of the parent transmission device 111. In the figure, the parent transmission device 1
11 is the number of signal transmission units 111A corresponding to the base station device.
Equipped with.

This signal transmission section 111A is used for the main unit 101.
And the same frequency is separated into an upstream channel and a downstream channel by time, a downstream signal from the main device 101 is converted into a digital signal, and an upstream signal to the main device 101 is converted into an original signal. TDD (time division full duplex) conversion unit 115, an encoding unit 116 for converting the digital signal converted by the TDD conversion unit 115 into a format for transmission via the coaxial line 102, and a digital signal encoded by the encoding unit 116. A modulator 117 that modulates the signal into a QPSK signal or the like and sends it to the head end 112, a demodulator 118 that demodulates the modulated signal into the QPSK signal or the like transferred from the head end 112, and a digital demodulated by the demodulator 118. A decoding unit 119 that converts the signal into a format specified by the main device 101 and sends the signal to the TDD conversion unit 115.
And the mobile station 108, 109, 110 by intercepting an uplink transmission signal between the base station apparatus 106, 107 which relay-controls the communication between the main apparatus 101 and the mobile station 108, 109, 110.
The extraction unit 200 for extracting the position signals of The extraction unit 200 is connected to the signal processing device 100.

FIG. 3 is a block diagram showing the internal configuration of the extraction unit 200. In the figure, the extraction unit 200 is a signal that constitutes an upstream transmission signal including position information.
A unique word generation unit 250 that generates a unique word for identifying the beginning of the, a reception unit 251 that receives an upstream transmission signal between the main device 101 and the base station devices 106 and 107, and a reception unit 251. The selection unit 252 that compares the unique word that identifies the beginning of the signal with the unique word generated by the unique word generation unit 250 and selects and outputs predetermined position information when they match and when there is no error.
If the rate of sending the memory unit 254 for temporarily storing the position information selected by the selection unit 252, the signal processing device 100 converts the position information temporarily stored in the memory unit 254 can be processed data rates a converting unit 255, a decryption unit 253 outputs to the selection unit 252 decodes the transmission request from the signal processing apparatus 100, detects whether there is an error in the signal received by the receiving unit 251, the detection result Selector 25
2 and an error detection unit 256 that outputs the data to the second unit.

FIG. 4 shows the main device 101 and the parent transmission device 11.
1 shows a configuration of an upstream transmission signal transmitted / received to / from the mobile station 1 and transmitted from the mobile stations 108, 109, 110 via the base station apparatuses 106, 107. In the figure, the upstream transmission signal 3
00 includes position information 301 of the PHS mobile device, a unique word 302 for identifying the beginning of the upstream transmission signal, digitized voice information 303, and error check information 304 for error detection / correction.

Next, the operation of the present embodiment configured as described above will be described. Bidirectional CAT shown in Fig. 1
In a simple mobile phone system (PHS / C) that configures an empty channel of the V network as a transmission path, uplink and downlink transmitted between the main device 101 and the mobile devices 108 to 110 via the base station devices 106 and 107. The communication signal of is subjected to TDD conversion by the parent transmission device 111 and the child transmission devices 113 and 114 into a signal that can be transmitted on the coaxial line 102.

In the parent transmission device 111, the time division multiplexed / demultiplexed signal sent from the main device 101 is divided by the TDD converter 115 into an upstream signal and a downstream signal. The divided downlink signal is converted by the encoding unit 116 into a signal format that can be transmitted by the coaxial line 102, and the modulation unit 117 performs QPS.
After being converted into a K signal or the like, it is transmitted to the child transmission devices 113 and 114 via the head end 112, the coaxial line 102, the trunk amplifier 103, and the distributors 104 and 105.

Further, the transmission devices 113 and 114 for the slaves to the distributors 104 and 105, the main line amplifier 103, and the coaxial line 10 are connected.
2, the parent transmission device 111 via the headend 112
The upstream signal transmitted to the main unit 1 is demodulated by the demodulation unit 118, converted into a format specified by the main unit 101 by the decoding unit 119, and then transmitted through the TDD conversion unit 115.
01 is transmitted.

On the other hand, the upstream transmission signal 300 including the position information transmitted by the extraction unit 200 of the parent transmission device 111, which is continuously or intermittently transmitted, is received by the receiving unit 251, and is output to the selecting unit 252. Selector 252
Then, the unique word for identification added to the head of the upstream transmission signal 300 is compared with the unique word generated by the unique word generation unit 250, and when they match, and when there is no error in the signal received by the error detection unit 256. When the determination is made, the position information 301 is detected, the voice information 303 other than the position information 301 is removed, the position information 301 is output to the memory unit 254, and is temporarily stored. Also, the delivery position information 301 temporarily stored in the memory unit 254 is converted into processable data rate by the speed conversion unit 255 to the signal processing apparatus 100. Then, the transmission request output from the signal processing unit 100 and decoded by decoding section 253 and outputs to the selection unit 252. In the above processing operation, the position information 301 is the selection unit 25.
It is repeated until it is selected from 2 .

In the signal processing device 100, the mobile stations 108 to 11 are sequentially called up when the position information of the mobile stations 108 to 110 from the plurality of extraction units 200 is sequentially called when necessary.
0 and a plurality of base station devices 106 and 107 are used to determine the time lapse of the communication of the position information, and the time lapse information and the mobile stations 108 to 110 are present in the wireless zone of the base station device 106 or 107. The position of the person who owns the mobile device 108 to 110 can be detected and managed from the registered position information indicating that the mobile device is to be operated.

In addition, when communication is performed between the mobile device 10 8 and the main device 101 via the respective transmission devices, coaxial lines, etc. according to the standard procedure of PHS, the mobile device 10 8
When the carrier carrying the mobile terminal moves from the wireless zone of the base station device 106 that was performing the relay function to the wireless zone of another base station device 107, the mobile device 10
8 to base station apparatus 107, slave transmission apparatus 114, distributor 105, main amplifier 103, coaxial line 102, distributor 10
4, an upstream transmission signal 300 including position information 301 via the head end 112 and the parent transmission device 111.
01 is transmitted. By processing the upstream transmission signal 300 by the extraction unit 200, the position where the mobile device carrier is present can be detected and managed.

Therefore, according to the above-described embodiment, it is possible to easily manage the presence position of the wandering person and the like by using the simple mobile phone system having the bidirectional CATV network as the transmission path. to utilize the CATV network as a transmission line, it is not necessary to secure the location of the new laying and base station apparatus of the metal wire, can you to build easily and inexpensively position management system, further, the position The management system can also be used for normal mobile communication.

In the above embodiment, a self-employed communication system in which the communication procedure is not unified has been described, but the present invention is not limited to this, and the interface condition is I.
It can also be applied to the public type and other types of mobile phone systems defined in the S point of SDN.

[0040]

As described above, according to the present invention, the bidirectional C
Using personal handyphone system for the ATV network and the transmission path, it is possible to easily manage the location of such wandering person, can you to build easily and inexpensively position management system, further The location management system can also be used as ordinary mobile communication.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission line according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a master transmission device according to the embodiment of the present invention.

FIG. 3 is a block diagram showing an internal configuration of an extraction unit according to the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an upstream transmission signal transmitted and received between a main device and a master transmission device according to an embodiment of the present invention and transmitted from a mobile device via a base station device.

[Explanation of symbols]

100 signal processor 101 Main device 102 coaxial line 103 Main line amplifier 104, 105 distributor 106, 107 Base station device (base station) 108, 109, 110 Mobile unit (mobile station) 111 Parental transmission device 112 headend 113 114 Child transmission device 111A signal transmitter 115 TDD converter 116 encoder 117 Modulator 118 demodulator 119 Decoding unit 200 extraction units 250 Unique word generator 251 receiver 252 Selector 253 Decoding section 254 memory section 255 speed converter 256 error detector 300-up transmission signal 301 location information 302 Unique Word 303 audio information 304 Error check information

Claims (15)

(57) [Claims] 1. A location management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system is a main unit for managing exchange control of mobile stations and position information. And a bidirectional CAT in the main device
A plurality of base station devices which are connected via a V network and relay and control communication with a plurality of mobile stations, and a time-division full-duplex signal between the main device and each of the base station devices is an upstream signal. And a downlink transmission signal, which are separated into a downlink signal and converted so as to be transmitted on a bidirectional CATV network. The parent transmission device intercepts an uplink signal to the main device, A location management system comprising extraction means for extracting location information of a mobile station included in an upstream signal. 2. The position management system according to claim 1, further comprising signal processing means for detecting the location of the mobile station by processing the location information extracted by the extraction means. 3. The unique word generator for generating a unique word for identifying the head of a signal forming an upstream transmission signal including position information, and the upstream signal between the main device and the base station device. And a unique word for identifying the beginning of the upstream signal received by the receiving section and the unique word generated by the unique word generation section, and when the both match and there is no error, only position information is selected. 3. The position management system according to claim 1, further comprising a selection unit that outputs the signal to a signal processing unit. Wherein extraction means outputs a memory unit for temporarily storing the position information selected by the selecting unit, the signal processing means converts the temporarily stored positional information can be processed data rate in the memory unit The position management system according to claim 3, further comprising a speed conversion unit. 5. The signal processing means determines the elapse of time of the communication of the position information of the mobile station and the plurality of base station devices by sequentially calling out the position information of the mobile station from the plurality of extracting means when necessary. position control system 請 Motomeko 2, wherein it has a configuration that. 6. A mobile station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system performs exchange control and position information of the mobile station. Main device to be managed and bidirectional CAT for the main device
A plurality of base station devices which are connected via a V network and relay and control communication with a plurality of mobile stations, and a time-division full-duplex signal between the main device and each of the base station devices is an upstream signal. And a downlink transmission signal, which are separated into a downlink signal and converted so as to be transmitted on a bidirectional CATV network. The parent transmission device intercepts an uplink signal to the main device, A mobile station that uses a location management system including extraction means for extracting location information of a mobile station included in an upstream signal. 7. A mobile station for a location management system using a simplified mobile telephone system having a bidirectional CATV network as a transmission path, wherein the location of the mobile station is processed by processing the location information extracted by the extraction means. 7. The mobile station according to claim 6, which uses a position management system further comprising signal processing means for detecting. 8. A mobile station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extracting means is the head of a signal forming an upstream transmission signal including position information. A unique word generation unit for generating a unique word for identifying, a receiving unit for receiving an upstream signal between the main device and the base station device, and a unique word for identifying the beginning of the upstream signal received by the receiving unit, compared to the unique word generated by the unique word generator, using a location management system comprising a selector for outputting only the signal processing unit selects the position information when and there is no error when matching claims 6 or 7 The listed mobile station. 9. A mobile station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extraction means is a memory section for temporarily storing the position information selected by the selection section. If, 請 using positional management system further comprising a speed conversion section to be output to the signal processing means converts the positional information temporarily stored in the memory portion can be processed data rates
The mobile station according to claim 8 . 10. A mobile station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the signal processing means is position information of the mobile station from a plurality of extracting means. by calling sequential when needed, according to claim 7, wherein the use of location management system to determine configure the temporal course of communication of the mobile station and position information of the plurality of base stations
Mobile station. 11. A base station for a location management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the simplified mobile phone system performs exchange control and position information of a mobile station. Main device to be managed and bidirectional CAT for the main device
A plurality of base station devices which are connected via a V network and relay and control communication with a plurality of mobile stations, and a time-division full-duplex signal between the main device and each of the base station devices is an upstream signal. And a downlink transmission signal, which are separated into a downlink signal and converted so as to be transmitted on a bidirectional CATV network. The parent transmission device intercepts an uplink signal to the main device, A base station that uses a location management system including extraction means for extracting location information of a mobile station included in an upstream signal. 12. A base station for a location management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the location of the mobile station is processed by processing the location information extracted by the extraction means. The base station according to claim 11, which uses a position management system further comprising signal processing means for detecting the. 13. A base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extracting means is the head of a signal forming an upstream transmission signal including position information. A unique word generation unit for generating a unique word for identifying, a receiving unit for receiving an upstream signal between the main device and the base station device, and a unique word for identifying the beginning of the upstream signal received by the receiving unit, compared to the unique word generated by the unique word generator, using a location management system comprising a selector for outputting only the signal processing unit selects the position information when and there is no error when matching claims 11 or 12 The listed base station. 14. A base station for a location management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the extraction means is a memory section for temporarily storing the location information selected by the selection section. If, 請 using positional management system further comprising a speed conversion section to be output to the signal processing means converts the positional information temporarily stored in the memory portion can be processed data rates
The base station according to claim 13 . 15. A base station for a position management system using a simplified mobile phone system having a bidirectional CATV network as a transmission path, wherein the signal processing means is moved from a plurality of extracting means. 13. A position management system configured to judge the passage of time of communication of position information of a mobile station and a plurality of base station devices by sequentially calling station position information when necessary.
The listed base station.