JPH0686367A - Area disaster prevention radio system - Google Patents

Abstract

PURPOSE:To individually attain an emergency communication by plural remote controllers connected to each general station. CONSTITUTION:This system is equipped with a control station 11 which forms a radio zone, and controls a communication operated through a radio line in the radio zone, plural remote controller 131-13N being the terminals of the communication, and general station 15 connected through the radio line to the control station 11, which operates the calling processing of a calling generated at the remote controllers 131-13N. The general station 15 is equipped with a storage means 17 which stores the identification information of the remote controller at which the specific transmitted calling is generated among the remote controllers 131-13N, and a control means 19 which limits the object of the calling processing of the transmitted calling to the remote controller corresponding to the identification information stored in the storage means 17 when a response signal is received from the control station 11 based on the procedure of the calling processing of the transmitted calling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication line required for disaster prevention work between a control station installed in a municipal office or other offices and a plurality of general stations connected to the control station via wireless lines. Regional disaster prevention wireless system

[0002]

2. Description of the Related Art At present, in each municipality, there is a disaster headquarters such as city hall, ward offices, town halls, etc. in order to secure communication channels required for disaster prevention work and smooth execution of work in the event of a disaster. Control stations located at different points, and police and fire related organizations, electricity, gas, medical, transportation, transportation, public institutions related to education, and life related organizations such as agricultural and fishery cooperatives. A local disaster prevention wireless system is provided for connecting to a plurality of established general stations via wireless lines.

FIG. 6 is a diagram showing a configuration example of a regional disaster prevention radio system. In the figure, the control station 61 is connected to a common station 62 ₁ through 62 _M of the same configuration via a wireless line. In the general stations 62 _{1 to} 62 _M , the wireless device 63 that accesses the above-mentioned wireless line is connected to the remote controllers 65 _{1 to} 65 _N having the same configuration via the line connector 64.

In the line connector 64, the control input / output of the radio device 63 is connected to the input / output bus of the control section 67 via the interface section (INTF) 66. One output of the control unit 67 is connected to the control inputs of the switches 68 _{1 to} 68 _N , and the other output of the control unit 67 is connected to the switches 69 _{1 to} 69 _N.
Connected to the control input of. The demodulation output of the wireless device 63 is connected to the input of the signal distributor 72 via the transformer 70 and the amplifier 71 that perform balanced-unbalanced conversion. Signal distributor 7
Each output of the 2 switches 68 ₁ to 68 _N are connected to the demodulated output of the one terminal and modem (MOD) 73 ₁ ~73 _N, the switch 68 ₁ to 68 _N of the other terminal, respectively amplifiers 74 ₁ to 74 _N Hybrid through (HYB) 7
Connected to 4-wire inputs from 5 ₁ to 75 _N. High lid 75
Two-wire output of ₁ to 75 _N are connected to the remote control 65 ₁ to 65 _N via a two-wire line. Hybrid 75 ₁ ~
The 75 _N four-wire outputs are connected to one terminals of the switches 69 _{1 to} 69 _N via amplifiers 76 _{1 to} 76 _N , respectively. The other terminals of the switches 69 _{1 to} 69 _N are connected to the demodulation inputs of the modems 73 _{1 to} 73 _{N and} the input of the signal combiner 77, respectively, and their outputs are passed through an amplifier 78 and a transformer 79 for performing unbalanced-balanced conversion. Connected to the modulation input of the radio 63. The baseband input / output of the modems 73 _{1 to} 73 _N is connected to the corresponding input / output of the control unit 67.

In the remote controllers 65 _{1 to} 65 _N , the two-wire input / output of the hybrid (HYB) 80 is connected to the two-wire input / output of the hybrids 75 ₁ to 75 _N via the above-mentioned two-wire line. . The four-wire output of the hybrid 80 is connected via an amplifier 81 to a demodulation input of a modem (MOD) 82 and one terminal of a switch 83, and the other terminal of the switch 83 is connected to a speaker 85 via an amplifier 84. The microphone 86 is connected to one terminal of the switch 88 via the amplifier 87, and the other terminal and the modem 8 are connected.
The modulated output of 2 is connected to the four wire input of hybrid 80 via amplifier 89. The baseband input / output of the modem 82 is connected to the corresponding input / output of the control unit 90. One output of the control unit 90 is connected to the control input of the switch 83, and the other output of the control unit 90 is connected to the control input of the switch 88.

With the local disaster prevention radio system having such a configuration
Uses 30 MHz of radio frequency in the 800 MHz band
Call channel, single control channel and controlled communication channel
A single wireless zone consisting of channels is configured. Also,
Control station 61 and general station 62 ₁~ 62_MAre each
Unique individual numbers and group numbers are assigned and
Selectively call each other using one of these numbers
By doing so, a call is made directly or via a relay station.
Further, the remote controller 65₁~ 65_NIs provided in the General Bureau
A plurality of terminal devices that share a single wireless device 63
Therefore, normal calls are made and received individually.

In the following, the control operation of the emergency contact communication performed by the general station 62 ₁ facing the control station 61 and directly accessing each other at the time of an emergency disaster will be described. At the general station 62 ₁ , the operator of one of the remote controllers 65 _{1 to} 65 _N (here, the remote controller 65 _k is used for the sake of simplicity) performs an operation for requesting emergency contact communication. When done, the control unit 90 of the remote controller outputs information indicating the request to the modem 82. The modem 82 PSK-modulates a predetermined subcarrier signal based on such information to generate a calling signal, and the calling signal is sent to the line connector 64 via the amplifier 89 and the hybrid 80 (see FIG. a)
).

In the line connector 64, such a calling signal
Is a hybrid 75_k, Amplifier 76 _kAnd switch 6
9_kVia modem 73_kGiven to the modem 73_kIs
The calling signal is PSK demodulated. The control unit 67
For the calling signal restored by such demodulation,
Process is prioritized to judge the normality and confirm the normality.
If you do, the information is promptly converted to the information shown in Fig.
It is given to the wireless device 63 via the face portion 66. Radio 6
3 is the sub-carrier by the calling signal converted in this way.
The wave signal is MSK modulated and then obtained by that modulation
Radio carrier of the above-mentioned control channel based on the modulated wave
The wave signal is modulated and transmitted to the control station 61 (Fig. 8 (a)
).

On the other hand, the control station 61 demodulates the call-out signal received from the general station 62 ₁ to generate a call-in signal, and sends the signal to the control stand based on a predetermined control procedure (FIG. 8).
(a)).

In the control console, when the incoming call signal is dealt with in the immediate response reception mode, the operator is notified that there is an emergency contact request, and the immediate response signal NAK is promptly sent.
Is transmitted (FIG. 8 (a)).

The control station 61 converts such an immediate response signal into information having the configuration shown in FIG. In the conversion process, the control station 61 sets information for individually calling the general station 62 ₁ in the selective calling field shown in FIG.
In addition, information designating the controlled communication mode is set in the lower 4 bits of the command code field. Furthermore, the control station 6
1 transmits the immediate response signal ACK generated by such conversion processing to the general station 62 ₁ via the control channel (FIG. 8 (a)).

At the general station 62 ₁ , the wireless device 63 receives and demodulates such an immediate response signal ACK. Control unit 6
7, the demodulated signal input through the interface unit 66, when recognizing that an individual call request control communication mode for the mobile station, via the modem 73 ₁ to 73 _N by information contained in the signal The subcarrier signal is PSK modulated. The modulated wave signal obtained by such modulation is transmitted to the switches 68 _{1 to} 68 _N and the amplifier 74 ₁
˜74 _N and hybrids 75 ₁ ˜75 _N to remote controllers 65 ₁ ˜65 _N individually (FIG. 8 (a)).
).

In the remote controllers 65 _{1 to} 65 _N , such modulated wave signals are PSK demodulated via the hybrid 80, the amplifier 81 and the modem 82. When the control unit 90 recognizes the immediate response signal ACK obtained by the demodulation, the control unit 90 sends out a ringing tone via the switch 83, the amplifier 84 and the speaker 85.

In the control console, when an incoming call signal (FIG. 8 (a)) is received from the control station 61, for example, if the immediate response reception mode cannot be dealt with because a call is in progress, Sends a waiting response signal NAK (Fig. 8 (b))
). In general station 62 _1, the control unit 67,90 is returned to the previous waiting state in which a request for emergency contact in response to such a waiting time of the response signal ACK.

Further, in the control station 61, a calling signal in which the control communication mode is designated according to an operation newly performed by the operator from the control console is transmitted (FIG. 8 (b)). The general station 62 ₁ sends out the ringing tone described above in response to such a calling signal.

If the general station 61 delays the timing at which the control console sends the immediate response signal ACK or the standby response signal NAK, or if these signals are not received, FIG. The call signal shown in Fig. 8 is repeatedly transmitted up to 11 times at intervals of 20 seconds (Fig. 8 (a)). Therefore, even when the control information transmitted / received via the wireless line is not normally received due to a change in the propagation state or the like, the emergency contact request is reliably transmitted to the control station.

[0017]

By the way, in such a conventional regional disaster prevention radio system, a single individual number is assigned to each general station, and as shown in FIG. In the selective call field of the response signal,
It did not include information specifying the remote controllers connected to the general station to which these signals were sent.

That is, in the general station that receives any of these response signals from the control station 61, even if the remote controller that has sent the call signal requesting the emergency contact communication is single, Since the remote controller did not issue a request for emergency contact communication because it could not be recognized, a ringing tone was output even though no incoming call was made to the remote controller. Therefore, in such a remote controller, the operator may be forced to interrupt work, which hinders smooth performance of work.

Further, since the structure of the control information transmitted and received via the wireless line is defined by the common specifications of the devices making up the system, it is not possible to change the structure between the current device and different models. It could not be applied because it would cause incompatibility between the two.

An object of the present invention is to provide a regional disaster prevention radio system in which a plurality of remote controllers connected to each general station can individually perform emergency contact communication without changing the signal system.

[0021]

FIG. 1 is a block diagram showing the principle of the present invention. The present invention provides a control station 11 that forms a wireless zone and controls communication performed through a wireless line in the wireless zone, and a plurality of remote controllers 1 that serve as communication terminals.
In the local disaster prevention wireless system including 3 _{1 to} 13 _N and a general station 15 that is connected to the control station 11 via a wireless line and performs call processing of a call that occurs in the remote controllers 13 _{1 to} 13 _N , Based on the call processing procedure of the outgoing call, the station 15 stores the identification information of the remote controller that originated the call among the remote controllers 13 _{1 to} 13 _N for the specific outgoing call. When a response signal is received from the control station 11, the control means 19 limits the call processing target to the remote controller corresponding to the identification information stored in the storage means 17. .

[0022]

According to the present invention, when a specific outgoing call is generated from any of the remote controllers 13 _{1 to} 13 _N , the storage means 17 stores the identification information of the remote controller that originated the call, and the general station 1
The control unit 5 faces the control station 11 and performs call processing for the call. When a response signal is received from the control station 11 based on such a call processing procedure, the control means 19 targets only the remote controller corresponding to the identification information stored in the storage means 17 for the call processing described above. To limit.

Therefore, the remote controllers 13 _{1 to} 13 _N can operate without changing the content and procedure of the control information transmitted and received between the control station 11 and the general station 15 via the wireless line. Communication by outgoing call can be performed individually.

[0024]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a diagram showing a first embodiment of the present invention.

In the figure, parts having the same functions and configurations as those shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted here. The characteristic configuration of the present invention is that, in the present embodiment, the line connectors 22 _{1 to} 22 _N configured by adding the memory 21 to the control unit 67 are arranged instead of the line connectors 64 ₁ to 64 _N. Located in the Control Bureau 6
1. The configurations of the wireless device 63 and the remote controllers 65 _{1 to} 65 _N are the same as those of the conventional example, and therefore the description thereof is omitted in this figure.

Regarding the correspondence between this embodiment and the block diagram shown in FIG. 1, the control station 61 corresponds to the control station 11, and the remote controllers 65 _{1 to} 65 _N are remote controllers 13 ₁ to 1.
Corresponding to 3 _N , wireless device 63, line connector 22 _{1 to} 22 _N
The general station including the remote controllers 65 _{1 to} 65 _N corresponds to the general station 15, the memory 21 and the control unit 67 correspond to the storage unit 17, and the control unit 67 corresponds to the control unit 19.

FIG. 3 is an operation flowchart of the line connector. The operation of this embodiment will be described below with reference to FIGS. 2, 3 and 6. The remote controller 65 _k sends out a calling signal in response to the operation of the operator who requests the emergency contact communication. The control unit 67 demodulates and fetches the calling signal via the modem 73 _k (FIG. 3 (1)), and based on the address of the input port corresponding to the modem, the above-mentioned remote controller number (= k ) Is calculated and temporarily registered in the memory 21 (see FIG. 3).
(2)).

When the control station 61 responds to the above-mentioned calling signal in the instant response reception mode, the instant response signal AC
Send K. When the control unit 67 receives the signal ((3) in FIG. 3), the flag indicating the immediate response is officially registered in the memory together with the number k of the remote controller temporarily registered in the memory 21 (( Figure 3 (4)). Further, the control unit 67 transfers the above-mentioned immediate response signal to the remote controller 65 _k corresponding to such a number (= k) (FIG. 3 (5)), and displays the contents of the corresponding storage area of the memory 21. Erase (Fig. 3 (6)).

Further, the control station 61 sends a waiting response signal NAK when it cannot respond in the immediate response receiving mode during a call or for other reasons. The control unit 67 formally registers the above-mentioned number k and the flag indicating the standby response in the memory 21 in accordance with the standby response signal NAK (see FIG. 3).
(4)) Standby once. When a call signal requesting a new emergency contact communication is newly received from a remote controller other than the remote controller 65 _k in this state, the control unit 67 is the same as in the immediate response receiving mode. Then, the remote controller number (= k) is calculated and temporarily registered in the memory 21 (FIG. 3 (2)).

The control unit 67 receives a new call signal from the control station 61 in such a waiting state (FIG. 3 (7)).
When the communication type of the calling signal is general communication, normal call processing is performed. On the contrary, when the communication type is control communication, the number (= k) officially registered in the memory 21 is supported. The calling signal is transferred to the remote controller 65 _k (see FIG. 3).
(8)), The contents of the corresponding storage area of the memory 21 are erased ((9) in FIG. 3).

As described above, according to this embodiment, the configuration of the control information transmitted and received via the wireless line is not changed, and the signal is sent only to the remote controller which has issued the calling signal requesting the emergency contact communication. Since the response from the control station 61 can be transferred, the ringing tone is not output from the remote controllers other than the remote controller that issued such a calling signal as in the conventional example.

When neither the immediate response signal nor the standby response signal is received after the above-mentioned number is temporarily registered in the memory 21, the control unit 67 makes a maximum of 1 in a 20-second cycle.
The calling signal for requesting the emergency contact communication is repeatedly transmitted once. Further, when none of the above-mentioned response signals is received before the completion of such repetitive transmission, the control unit 67 erases the number temporarily registered in the memory 21 and returns to the standby state (Fig. 3 (10)).

FIG. 4 is a diagram showing a second embodiment of the present invention. In the figure, parts having the same functions and configurations as those shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted here.

In the present embodiment, the feature of the present invention is that the remote controllers 42 _{1 to} 42 _N constructed by adding the memory 41 to the controller 90 are replaced with the remote controllers 65 _{1 to} 65 _N. Since the control station 61, the wireless device 63, and the line connectors 64 ₁ to 64 _N are the same as those in the conventional example, the description thereof is omitted in this figure.

Regarding the correspondence between this embodiment and the block diagram shown in FIG. 1, the control station 61 corresponds to the control station 11, and the remote controllers 41 _{1 to} 41 _N are remote controllers 13 ₁ to 1.
Corresponding to 3 _N , wireless device 61, line connector 64 ₁ to 64 _N
The general station including the remote controllers 42 _{1 to} 42 _N corresponds to the general station 15, the memory 41 and the control unit 90 correspond to the storage unit 17, and the control unit 90 corresponds to the control unit 19.

FIG. 5 is an operation flowchart of the remote controller. The operation of this embodiment will be described below with reference to FIGS. 4, 5 and 6. The signals transmitted and received by the remote controllers 42 _{1 to} 42 _N facing the control station 61 in response to a call requesting emergency contact communication are relayed and transferred via the line connector 64 ₁ as described above. In addition, the control unit 90 is shown in FIG.
Regarding the processes shown in (4), (6), (7), and (9) to (10), the same process is performed by accessing the memory 41 instead of the memory 21, and therefore, in FIG. The same numbers are given to the processes and shown, and the description thereof is omitted below.

However, the processing corresponding to FIGS. 3 (5) and 3 (8) is indicated in the memory 41 by the information transmitted (transferred) from the line connector 64 ₁ to the remote controllers 42 _{1 to} 42 _N. Since the stored number k is stored, the control unit 90 determines whether or not the number matches the number of the remote controller equipped with the control unit 90 itself, and if not, the contents registered in the memory 41. Is erased and the state returns to the standby state. However, if they coincide with each other, the contents registered in the memory 41 are similarly erased and the control communication process is continued. (Fig. 5 (5) ',
(8) ′).

As described above, according to the present embodiment, the configuration of the control information transmitted and received via the wireless line is not changed, and the signal is sent only to the remote controller which has issued the calling signal requesting the emergency contact communication. Since the response from the control station 61 can be recognized, the ringing tone is not output from the remote controller other than the remote controller that issued such a calling signal, unlike the conventional example.

[0039] In the embodiments described above, but any of the remote control _{65 1 ~65 N (42 1 ~42} N) has been described the operation in the case of requesting the emergency communication, the present invention includes a call If the general station needs to handle the remote controller generated by the above-mentioned remote controller separately from other remote controllers, it can be applied to any call.

Further, in the embodiments described above, the remote controller _{65 1 ~65 N (42 1 ~42} N) is connected to the common station via the 2-wire line, in between the two signals of such lines Information is transmitted and received by a PSK modulation method suitable for the method, but in the present invention, any signal method and modulation method can be applied as long as such information is surely transmitted and received.

Further, in each of the above-described embodiments, information is transmitted and received between the line connector and the control station by the MSK modulation method, but in the present invention, such information is transmitted and received reliably. Then, any modulation method may be used.

[0042]

As described above, according to the present invention, for a particular outgoing call, the identification information of the remote controller that originated the call is stored, and when the response from the control station is received in response to the call. The target of call processing is limited to the remote controller corresponding to the identification information thus stored.

That is, as in the conventional example in which the general station performs the above-mentioned call processing for all the remote controllers according to the response received from the control station, the remote controller other than the originator of the specific outgoing call makes a ringing tone. Therefore, each remote controller must individually perform emergency contact communication and other specific outgoing call communication without changing the content and procedure of the information transmitted and received via the wireless line. You can

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is an operation flowchart of the line connector.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is an operation flowchart of the remote controller.

FIG. 6 is a diagram showing a configuration example of a regional disaster prevention wireless system.

FIG. 7 is a diagram showing a configuration of information transmitted and received via a wireless line.

FIG. 8 is a diagram showing a control procedure of emergency contact communication.

[Explanation of symbols]

11, 61 Control station 13, 42, 65 Remote controller 15, 62 General station 17 Storage means 19 Control means 21, 41 Memory 22, 64 Line connector 63 Radio equipment 66 Interface unit (INTF) 67, 90 Control unit 68, 69,83,88 Switch 70,79 Transformer 71,74,76,78,81,84,87,89 Amplifier 72 Signal distributor 73,82 Modem (MOD) 75,80 Hybrid (HYB) 77 Signal combiner 85 Speaker 86 microphone

Claims (1)

[Claims] 1. A control station (1) that forms a wireless zone and controls communication performed through a wireless line in the wireless zone.
1) and a plurality of remote controllers (13 _{1 to} 13) serving as terminals for the communication.
_N ), connected to the control station (11) via the wireless line,
In a regional disaster prevention wireless system comprising a general station (15) for performing call processing of a call generated in the remote controller (13 _{1 to} 13 _N ), the general station (15) is provided with a specific outgoing call, The remote controller (13 _{1 to} 13)
Of _N), and storage means for storing identification information of the remote controller the call is originated (17), said control station based on the procedure of call processing of the outgoing call (1
And a control means (19) for limiting the call processing target to a remote controller corresponding to the identification information stored in the storage means (17) when the response signal is received from 1). A regional disaster prevention wireless system.