JPS60143037A - Mobile radio communication system - Google Patents

Abstract

PURPOSE:To attain conversation with a center device by constituting a system with plural radio base stations and many mobile radio devices connected to the center device. CONSTITUTION:When a transmission request from a mobile radio device 3 is transmitted, it is received by a radio base station 2, information of reception level is added and it is transmitted to the center device 1 together with an identification signal. The center device 1 raises an alarm tone and analyzes a signal form the radio base station 2. When the signal is identified as a communication request signal, a communication regulation signal is transmitted. This signal is relayed by the radio base station 2 and received by a mobile radio device 3. The mobile radio device 3 transmitting a transmission request where the identification signal is coincident releases the restriction of communication, brings amplifiers 34, 38 to the operating state to constitute a channel between the mobile radio device 3 and the center device 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to a mobile radio communication system that uses a small portable mobile radio to make a call to a center receptionist. The present invention allows elderly people, sick people, physically disabled people, and other people who may need emergency care to carry a small mobile renshin machine and call a center device where a receptionist is stationed when necessary. This method was developed as a mobile radio communication method for making phone calls.

[Background of the invention]

Japan's population is rapidly aging as people live longer and the birth rate decreases. Traditional family relationships are also changing, and younger generations of family members are no longer able to care for the increasing number of elderly people. For this reason, when the elderly require care, it has become necessary for public institutions to deal with the problem in an organized manner.

Furthermore, it is a social requirement to provide the necessary support and care to physically disabled people so that they can participate independently in society. For example, measures have been taken to install ramps on roads that wheelchairs can pass through, but the ability for people with physical disabilities to request the necessary care when they need it through communication is an important contribution to society for people with physical disabilities. This opens a bright path for the active participation of

Traditionally, for example, a sick person carries a small mobile radio,
A mobile radio communication system is known that allows pulse rate information to be transmitted to a central device, but this is used in special hospitals and the like, and is not suitable for organizational use by public institutions.

Furthermore, various mobile radio communication systems, including car telephone systems, have been developed and are in operation; can be,
In a situation where nursing care is required urgently, it is necessary to check whether appropriate operations such as dialing are performed, and even if a call can be made, the location of the mobile radio device and the preparation of the callee's response. Considering the above, mobile radios connected to public telephone lines will not solve the problem of caring for the elderly, the physically disabled, and others.

In addition, there is the problem of power supply for mobile radio communication equipment, and while automotive radio equipment can use a fairly large power supply installed in the car, portable radio equipment has an extremely small power supply capacity, and the transmission power is naturally low. becomes smaller. For this reason, it is not possible to transmit signals with high transmission power from the portable radio device. Therefore, in order to communicate with a portable wireless device, base stations must be installed not every several tens of kilometers but at short distances such as every several kilometers or less.

Furthermore, there are problems with the allocation of radio frequencies for communication, and since radio waves are in the public domain, it is not possible to use a large number of channels for this type of mobile radio communication.

In addition, wireless communication systems that use a common frequency to respond to calls by voice, such as mobile radio communication systems such as police radios or fire department radios, have problems in handling by inexperienced elderly or physically disabled people. It is undesirable that the content of a call is intercepted by another mobile radio, or that an unrelated mobile radio carrier carries an unnecessary interrupt transmission when a call is being made for relief.

There is a mobile radio communication system for individual calling, which has traditionally been used under the name "Bokesotoheru", which allows a center device to call mobile radios individually, but it is not possible to respond within that radio system. However, it is not possible to make a telephone call following the call.

In order to care for the elderly, the physically disabled, and others, it is necessary to make calls to hear the situation in response to emergency communications. The center equipment does not automatically respond coldly from a machine, but a kind receptionist who responds directly, preferably speaking the local dialect, and if necessary provides verbal encouragement, giving a sense of security and trust, and providing a sense of security and trust. It is necessary to make appropriate arrangements and considerations thereafter.

Further, even if there is a communication requesting care, if the location of the person receiving the care is not clear, care cannot be provided.

It is assumed that the person carrying the mobile radio is unable to appropriately inform the center device of his or her current location, such as a trained police officer in a patrol car.

[Purpose of the invention]

The present invention was developed against this background.■ The mobile radio device is extremely small.■ Radio frequencies can be handled by one channel for each side. ■ Communication can be started with a simple operation. ■ Real voice communication is possible. ■ Preferably, the contents of the call can be confidentially communicated to other mobile radios; ■ Preferably, during a call between one mobile radio and the center equipment, other mobile radios cannot communicate. ■ Individual calls can be made from the center equipment side if necessary; ■ The location of mobile radio equipment can be searched from the center equipment side if necessary. The purpose is to provide a mobile radio communication system.

[Features of the invention]

The system of the present invention includes one center device in which a receptionist is stationed, a plurality of wireless base stations connected to this center device through a fixed transmission path (wired transmission path or wireless transmission path), and this wireless base station. and a large number of mobile radio devices connected by a radio transmission path. The mobile radio is carried by the person who may require care at all times. There are no people stationed at wireless base stations, but devices that operate automatically in response to received signals are placed there. When communication is started, a direct call is made between the person carrying the mobile radio and the receptionist at the center device. The mobile radio can be activated by a simple operation, for example by pressing a push button, and automatically transmits a communication request and an identification signal corresponding to an identification number uniquely assigned to the mobile radio. Send as. In principle, this is received by multiple wireless base stations. Radio base stations are placed at intervals of several kilometers or less.

The wireless base station that has received the transmission request radio signal automatically transfers the received information on the identification number along with information on the reception level of the radio signal to the center device. When the center device receives this signal, it issues an alarm to the recipient. The center device selects a radio base station with a high reception level from the transferred reception level information, and transmits a response signal to the selected radio base station according to the operation of the receiver.

A voice communication line is set up between the wireless base station and the center device. In response to the response signal from the center device, the radio base station transmits a response radio signal with an identification signal of the mobile radio that sent the communication request, and the mobile radio receives the voice signal arriving on the voice line. The demodulated signal of the radio wave signal transmitted by the mobile radio is relayed to the voice line.

Furthermore, the wireless base station can send a calling radio signal with an identification signal attached under the control of the center equipment, and when the mobile radio receives this calling radio signal, the mobile radio uses the identification signal to identify its own station. It can be configured to match the signal and send out a ringing sound when a match is found.

Under the control of the center device, the radio base station broadcasts a signal for communication regulation and a signal for canceling the communication regulation, and mobile radio devices that receive the signals are restricted from transmitting and receiving, and are also released. .

Furthermore, when a radio wave signal is transmitted from a mobile radio device, the position of the mobile radio device can be determined by utilizing the fact that this radio wave signal can be received by a plurality of radio base stations. .

[Explanation based on examples]

A specific example of this method will be explained based on the drawings.

FIG. 1 is a layout diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is a control signal configuration diagram of an embodiment of the present invention. In FIG. 1, ■ is a center device, 2 is a radio base station, and 3 is a mobile radio device. A receptionist is always present at the center device 1, and a public telephone line, a fire and rescue line, etc. are connected, and the center device 1 is equipped with equipment for making necessary communications for relief. The center device 1 is installed, for example, in a telephone office or in a government building of a local government.

The wireless base station 2 is installed, for example, on the roof of a public phone booth. In urban areas, for example, they are installed approximately every 1 km, and are directly connected to the center equipment via dedicated lines. The radio base station 2 is unmanned except in the case of failure or periodic maintenance, and in principle receives commercial power and operates under the control of the center device I or automatically.

The mobile radio device 3 is carried by elderly people, physically disabled people, etc. who may require nursing care. Its shape is about the size of a cigarette case, and the only operating part is basically a call request button, and it is equipped with a small speaker and microphone.

The mobile radio device 3 can make a call by operating a call request button, and can communicate directly with the receptionist of the center device 1 using real voice.

FIG. 3 is a block diagram showing an example of the mobile radio device 3. As shown in FIG. The antenna 3I is connected to a receiving circuit 33 via a transmitting/receiving circuit 32, and the received demodulated output of the receiving circuit 33 is connected to a speaker 35 via an audio amplification circuit 34. The output of the receiving circuit 33 is branched and input to the control circuit 36. The output of the microphone 37 is input to an audio amplification circuit 38, and its output is connected to a modulation input of a transmission circuit 39. The output of the transmitting circuit 39 is connected to the antenna 31 via the transmitting/receiving circuit 32. A necessary power supply current is supplied from the power supply circuit 40 to each circuit. The control circuit 36 includes a microprocessor 42, a memory 43, an interface 44, and a clock 45.

The transmitting carrier frequency of the transmitting circuit 39 and the receiving carrier frequency of the receiving circuit 33 are different frequencies, and are configured to allow simultaneous transmission and reception.

FIG. 4 is a block diagram showing an example of the wireless base station 2. As shown in FIG. The antenna 21 is connected to the receiving circuit 23 via the transmitting/receiving circuit 22, and its receiving demodulated output is sent to the audio amplifier circuit 2.
Connected to 4. The output of the audio amplification circuit 24 is transferred to the switching circuit 3
Connected to a wired line from 0. The modem circuit 25 connects the control circuit 26 to the center device 1 via a wired line. Control circuit 26 includes a microprocessor and memory. A reception level detection circuit 27 for detecting the reception level is connected to the reception circuit, and its detection output is connected to a control circuit 26. The audio signal arriving on the wired line is connected to the input of the audio amplification circuit 28 for transmission via the switching circuit 30, one input of which is connected to the modulation input of the transmission circuit 29, and the transmission output is output from the transmission/reception common circuit 22 to the input of the audio amplification circuit 28 for transmission. f21
connected to. The receiving carrier frequency of the receiving circuit 23 is the frequency that the mobile radio device 3 transmits, and the transmitting carrier frequency of the transmitting circuit 29 is the frequency that the mobile radio device 3 receives.

In this embodiment, the radio frequency is one channel each for uplink and downlink, and is common to each mobile radio device 3 and radio base station 2.

FIG. 5 is a block diagram showing an example of the center device 1. As shown in FIG. Wired line L1 connected to a plurality of n wireless base stations 2
, L2, . . . Ln are accommodated in the line interface 11. The audio output of this line interface 11 is connected to a console 14 via a receiving audio amplification circuit 12. The audio output from the operation console 14 is transmitted through the audio amplification circuit 13.
It is connected to the line interface 11. The control signal of the line interface 11 is connected to the modem circuit 15,
This modem circuit 15 is connected to a control circuit 16. Control circuit 16 includes a microprocessor and memory;
The display output is displayed on the CRT display section of the console 14. Furthermore, the control circuit 16 can be operated from the console 14. Control circuit 16 is connected to line interface 11 and provides control signals.

The memory of the control circuit 16 of the center device 1 or a separately provided memory stores personal data of the person carrying the mobile radio device 3,
For example, names, addresses, medical records, physical conditions, environmental conditions, situations when receiving nursing care in the past, etc. are stored, and this information is read out on the screen of the reception desk of the center device l, and then the recipient is this.

You can respond while watching.

A procedure for transmitting a call request from the mobile radio 3 and processing the call request will be explained. FIG. 6 is an explanatory diagram of the transmission sequence. When the call request button of the mobile radio 3 is operated, the control circuit 36 of the mobile radio 3 checks whether there is a call restriction and whether there is a carrier that is transmitting from another station, and then issues a call request as shown in FIG. The signal is transmitted as a radio signal. This signal is composed of a preamble code Pa, a start code St, a signal type code Cβ, an information code 1)a, and a check code Pt, and the information code Da transmits an identification signal PID uniquely assigned to the mobile radio. be done.

This communication request signal is sent to the wireless base station 2 which is always in reception state.
received at Since the radio base stations 2 are arranged at relatively short intervals, this communication request signal is generally received by a plurality of radio base stations 2 at the same time.

When the wireless base station 2 receives this transmission request signal, it automatically operates to detect the reception level of the received radio wave signal, add information on the reception level, and transmit it to the center device 1 together with the received identification signal. do.

When a signal arrives from a wireless base station 2, the center device 1 emits an alarm sound to rouse the recipient, and analyzes the signals from a plurality of wireless base stations 2. This analysis is performed by a microprocessor-based controller. When the center device 1 identifies that this signal is a communication request signal, a communication restriction signal is transmitted from the control circuit of the center device 1 to each of the radio base stations 2. This communication restriction signal includes an identification signal of the mobile radio device 3 with which communication is to be performed. Each radio base station 2 that receives this relay-broadcasts this communication regulation signal. The mobile radio device 3 that received this communication restriction signal compares the identification signal with its own identification signal, and if the mobile radio device 3 whose identification signal does not match, the audio amplification circuit 3 of the receiving circuit
4 and transmission circuit 39 are automatically prohibited.

In the mobile radio device 3 that sent the communication request signal, the identification signal included in this communication restriction signal matches its own identification signal, so it does not enter the communication restriction state and the amplifier 3 of the receiving circuit
4 and the transmitter circuit amplifier 38 are activated. When the wireless base station 2 completes transmission of the communication restriction signal, it couples the audio signal of the wired line to the transmitting circuit 29, and couples the output audio signal of the receiving circuit 23 to the wired line.

This establishes a communication line between the mobile radio R3 that sent the communication request and the center device 1. For calls, use center device 1
The reception can be started by calling the person carrying the mobile radio 3 by voice. The person carrying the mobile radio device 3 can answer this in a normal voice, explain the situation, and tell what kind of relief is needed. When the receptionist at the center device 1 understands this, he uses another telephone line or an emergency line to take necessary rescue measures, and conveys this information to the person carrying the mobile radio device 3 to reassure and encourage him. be able to. At this time, the personal data of the person carrying the mobile radio device 3 stored in the center device 1 is read out on the screen of the reception desk, and the necessary measures can be determined using this as a reference. .

When all necessary calls are completed, by releasing the communication request button on the mobile radio device 3, the mobile radio device 3 transmits a call termination request signal and an identification signal PID, which are relayed by the radio base station 2 and sent to the center. is sent to device 1. When the center device 1 confirms this, it transmits a disconnection signal and a communication restriction release signal, and each wireless base station 2 relays these signals and broadcasts them as radio wave signals. When each mobile radio device 3 receives this restriction release signal, it releases the communication restriction state and returns to a steady state.

FIG. 7 is an explanatory diagram of the incoming call sequence when the mobile radio device 3 is called from the center device 1. This occurs when the carrier of the mobile radio 3 becomes unknown, or when communication is completed with the mobile radio 1a 3 that once sent the communication request.
This is necessary when, for example, the situation has changed and you want to talk to the person carrying the mobile radio 3 again.

In FIG. 7, when the receiver of the center device 1 determines that a call is required to arrive at the mobile radio device 3, it detects whether the communication channel is busy and sends a call request signal to the mobile radio of the called party. Transmits a calling signal to which the identification signal PID of machine 3 is added. When the approximate location of the mobile radio device 3 to be called is known, the transmission can be made only to the radio base station 2 in the vicinity.

The radio base station 2 that received this broadcasts the paging request signal and the identification signal PAD as radio signals.

At this time, it is possible to simultaneously transmit a communication restriction signal to the mobile radio device 3 of the identification signal PID, thereby restricting communication to the outside.

The mobile radio tJ13 that received this identifies whether or not the identification signal PID matches its own identification signal, and when it is determined that the identification signal PID matches its own identification signal, the mobile radio tJ13 lights up a calling lamp or sends out a ringing sound to notify the incoming call. Let me know something. For a mobile radio device 3 whose identification signal does not match its own identification signal, communication is restricted by the same operation as described above. When the person carrying the mobile radio 3 confirms this call, he presses the answer button,
The mobile radio device 3 automatically transmits a paging response signal and a PI'D signal. The response button can be the same button as the call button.

This call response signal is relayed by the wireless base station 2 to the center device l. At this time, as in the case of a transmission request, a signal of the reception level of the received radio wave signal from the mobile radio device 3 is added. When the receptionist at the center device 1 confirms this, he selects the radio base station 2 to be used and transmits the call command signal and the identification signal PID. This is relayed by the radio base station 2, and the mobile radio device 3 receives it to set a call state.

The call termination procedure after the call is completed is the same as for the above-mentioned call. The call termination procedure can be activated from the center device 1 side.

Next, to explain the search for the current position of the mobile radio device 3 that transmitted the radio signal, the signal transmitted from each radio base station 2 to the center device 1 includes information on the reception level of the radio signal as described above. Based on this information, it is estimated that the mobile radio device is located near the radio base station 2 where the reception level of the radio wave signal is high. However, the situation of radio wave propagation is not necessarily uniform, and there are complex reflections, etc., especially in areas outside the city. Therefore, each wireless base station 2
It is preferable to investigate in advance information about the form of propagation around each signal, store this information in the microprocessor of the center device 1, and use it for signal analysis.

The radio base station 2 is equipped with a device that can rotate the directivity of the antenna, and this directivity is rotated by remote control of the center device 1 to search for the direction of the incoming transmitted radio signal from the mobile radio device 3. It can be configured to:

In order to enable people with physical disabilities, especially deaf and dumb people, to use this mobile radio communication system, a device is provided for transmitting and receiving handwritten image information to the mobile radio 3 via a voice communication channel. can be connected. This device can be used, for example, [Sato et al.: Graphical Image Communication System, Research and Practical Application Report No. 32, Volume 3 (March 1983), published by Nippon Telegraph and Telephone Public Corporation, pp. 13 et seq.] or [Sukesochihon Nitsuken Monthly Report No. This is the device disclosed in Vol. 36, No. 4 (April 1983, published by Nippon Telegraph and Telephone Public Corporation, pp. 13 et seq.). This device is a device that simultaneously displays an image drawn on a screen on the screen of a partner device, and can transmit bidirectional signals to an audio signal channel. This device can be used in connection with the audio signal channel of the mobile radio 3 either electrically or by means of an acoustic coupler.

〔Effect of the invention〕

According to this mobile radio communication system, ■ The mobile radio device is extremely small, ■ The radio frequency can be handled by one channel for each side, ■ Communication can be started with a simple operation, and ■ The receptionist at the center device can communicate with his/her own voice. ■ The content of the call can be communicated confidentially to other mobile radios; ■ It can be regulated so that there is no interference from other mobile radios during a call; ■ If necessary, the center equipment can ■ The current location of the mobile radio that transmitted the radio signal from the center device can be searched if necessary; ■ The device can be used by deaf and dumb people if necessary. It is possible to provide a mobile radio communication system that satisfies the following requirements.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing the arrangement of equipment according to an embodiment of the present invention. FIG. 2 is a signal configuration diagram of control signals. FIG. 3 is a block configuration diagram showing an example of the configuration of a mobile radio device. FIG. 4 is a block configuration diagram showing an example of the configuration of a wireless base station. FIG. 5 is a block configuration diagram showing an example of the configuration of the center device. FIG. 6 is an explanatory diagram of the transmission sequence. FIG. 7 is an explanatory diagram of the incoming call sequence. Patent Applicant Nippon Telegraph and Telephone Public Corporation Mitsubishi Corporation Patent Attorney Nao Ide Takahama 3 Illustration 4 Leap M 5 Illustration Ota wJxlLR,,t"jr'jkjls'l!!-
a t>9! ijJLM 6 Figures: Multiple overlapping rivers Fattening (deepening) 1 flaw 7 Figures

Claims (1)

[Claims] (11) A center device where receptionists are stationed, a plurality of wireless base stations connected to this center device by a fixed transmission path, and a plurality of wireless base stations connected to this wireless base station by a wireless transmission path. In a mobile radio communication system comprising a mobile radio and configured to conduct a call between the mobile radio and the center device, the mobile radio has a mobile radio that is individually assigned to each mobile radio. an identification signal sending means for sending out an identification signal, an operating means using a push button for making a communication request, and an identification signal that activates a transmitting circuit when the operating means is operated, and the identification signal sending means sends out an identification signal. means for automatically transmitting a transmission request radio wave signal modulated with a radio wave signal, and when the radio base station receives a radio wave transmitted by a mobile radio device, it attaches information on the reception level of the radio wave and information on the identification signal. The center device includes means for automatically transmitting the received signal to the center device; a selection means for selecting a radio base station with a high reception level according to the reception level information attached to the signal received from each base station when the signal is received from the radio base station; means for transmitting a response signal attached with information on the identified identification signal to the radio base station selected by the selection means, and communication means for setting up a voice communication path with the radio base station, Furthermore, the radio base station includes a means for receiving the response signal, attaching an identification signal thereto, and transmitting a large response radio signal; connect the demodulated signal to the voice communication path,
A mobile radio communication system comprising means for modulating a voice signal arriving from the center device onto a voice communication path into a radio wave signal and transmitting the modulated signal. (2) The radio base station is equipped with a means for transmitting a calling radio signal with an identification signal attached under the control of the center equipment, and the mobile radio equipment receives the identification included in the calling radio signal when it receives the above-mentioned calling radio signal. A mobile radio communication system according to claim 11, comprising means for comparing the signal with an identification signal of the own station, and means for emitting a ringing sound when a match is detected by the means. (3 ) The radio base station includes a means for simultaneously transmitting to mobile radio devices a regulated radio wave signal for restricting transmission and reception, and a deregulation radio wave signal for lifting the above restrictions, and the above regulated radio wave signal includes: It includes an identification signal for mobile radio equipment that is not subject to regulation, and the mobile radio equipment is equipped with a means for restricting transmission and reception in devices other than the mobile radio equipment designated by the identification signal upon receiving the regulation radio wave signal. The mobile radio communication system according to claim 2.
A mobile radio communication system according to claim fl), comprising means for locating the current position of the mobile radio. (5) The mobile radio device is configured to be able to connect a device for transmitting and receiving handwritten image information via a voice communication channel, and the center device is configured to have handwritten image information corresponding to the above device. A mobile radio communication system according to claim 11, wherein a device for transmitting and receiving image information of images via a voice communication channel is connected.