JP2000049974A - Emergency notice system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of the center with respect to the emergency notice system that informs the center of occurrence of an emergency. SOLUTION: In an emergency notice system where terminals 1-1-1-n and the center 2 are connected via an ISDN exchange network 6, the center 2 is provided with plural processing sections 4-1 to 4-k interconnected by a LAN 5 and plural line adaptors 3-1 to 3-m connecting to an ISDN line, and each of the terminals 1-1 to 1-n is provided with a setting table 10 to which plural notice destination numbers with a priority to select and designate plural adaptors of the center 2 are set and a communication control section 11 that conducts packet communication through a D channel of the ISDN line with the center 2 based on the notice destination number with high priority set to the setting table 10 and conducts packet communication with a notice destination number of the 2nd priority when reception is not confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency notification system for notifying a center of occurrence of an emergency. When a device failure occurs during remote monitoring of various devices, fire detection using a fire detector, intrusion detection using an illegal intrusion detector, or pressing the notification button when an emergency illness occurs, etc. Various types of emergency notification systems for automatically reporting from a device to a center via a line have already been proposed. Emergency calls rarely occur, and if an emergency call cannot be received due to a failure on the center side at that time, the reliability of the system is reduced. It is desired to improve such points.

[0002]

2. Description of the Related Art FIG. 10 is an explanatory view of a conventional example of an emergency call system, in which 51-1 to 51-n are terminal devices, 52 is a center, 53 is a line corresponding unit, 54 is a processing device, and 55 is a switching network. Is shown. The terminal devices 51-1 to 51-n are connected to various sensors such as a temperature sensor, a smoke sensor, and an illegal intrusion sensor, a notification button, and the like.
It has a function to automatically call for.

[0005] The center 52 includes a line corresponding unit 53 connected to a switching network 55 and a processing unit 54 for receiving and processing emergency call information. The line corresponding unit 53 responds to a call from a terminal device. When an automatic response is received and emergency information is received from the terminal device, the information is transferred to the processing device 54. Processing unit 54
Receives the emergency call information, identifies the alerting terminal device, identifies and displays the contents of the emergency call information, etc.,
The operator of the center 52 contacts the police, fire department, hospital, etc. based on the displayed contents and the like.

The automatic calling function of each of the terminal devices 51-1 to 51-n is set so as to make a call only to the center 52. Due to the failure, the terminal devices 51-1 to 51-n
May not be able to receive emergency call information. If another terminal device makes a call first and is connected to the line corresponding unit 53 of the center 52 via the switching network 55, the terminal device that subsequently makes a call is busy on the center 52 side. , Emergency information cannot be transmitted. In such a case, even if an emergency occurs, it is not possible to take prompt action for the emergency, and there is a problem that the reliability of the emergency notification system is reduced.

[0005] Therefore, it has been proposed that the line correspondence unit 53 and the like have a duplex configuration. FIG. 11 is an explanatory diagram of an emergency call system having a duplex configuration according to a conventional example.
-N is a terminal device, 62 is a center, 63-1 to 63-m are line corresponding units, 64-1 to 64-k are processing units, and 65 is LA.
N (local area network), 66 indicates a switching network.

The processing units 64-1 to 64-k of the center 62
Manages a plurality of terminal devices 61-1 to 61-n separately in groups. When information from a terminal device in charge of another processing unit is received and processed, a process in charge of the terminal device is performed. Unit via the LAN 65. Also, a case is shown where two line corresponding units are connected to the processing unit 64-k. The center 62 applies the representative number service, and all the line corresponding units 63-1 to 63-m are set as a representative number group or divided into a plurality of groups.
It is also possible to adopt a configuration in which a representative number is assigned to each.

Accordingly, each of the terminal devices 61-1 to 61-n
Is to set the automatic calling number at the time of emergency call as the representative number of the center 62. In response to a call made by a representative number from a terminal device in the event of an emergency, the switching network 66
The vacant line corresponding part of the representative number group of the center 62 is selected and received.

For example, when the line corresponding units 63-1 and 63-2 are a representative number group, the first line corresponding unit 63-1
Call. If the line handling unit 63-1 is already receiving emergency call information from another terminal device, the switching network 66
Since the line corresponding unit 63-1 is in a busy state, the line corresponding unit 63-2 next to the representative number group is selected and received. As a result, even if emergency calls from a plurality of terminal devices are duplicated, the call can be received by the switching network 66 to the vacant line corresponding unit, so that emergency call information can be received.

[0009]

In the conventional emergency call system, for example, in the case of a single configuration as shown in FIG. 10, it is assumed that the line corresponding unit 53 is responding to another terminal device. , The center 52 is busy and cannot receive another emergency call. Also, due to the occurrence of a failure in the line handling unit 53 or the like, it becomes impossible to receive emergency calls from all terminal devices. On the other hand, for example, in the case of a duplex configuration as shown in FIG. 11, by applying the representative number service, when one line corresponding unit is responding to the incoming call, the other representative number group Will be able to receive the call.

[0010] However, in the case of the representative number service, when there is a line corresponding part in the busy state, another line corresponding part of the representative number group is selected and the call is received. In a state where an emergency call cannot be received from the terminal device due to a failure, the switching network 66 does not have a function of selecting another available line corresponding unit in the representative number group.

That is, the switching network 66 determines whether or not the receiving side is busy and selects an idle state, and cannot identify whether or not a failure has occurred. Therefore, if there is a line handling unit or a processing unit in which a failure has occurred, an operation of recognizing the failure and closing the switching network 66 (busy state) is required. The operator of the center 62 detects that the emergency notification information cannot be received due to such a failure on the side of the center 62 by a failure occurrence alarm or the like, and operates the operator to switch the line handling unit corresponding to the failure occurrence to the switching network. In this case, a process for closing the block is performed. Therefore, there is a problem that it is difficult to respond quickly due to complicated operation, and thus, there is a problem that reliability of the emergency notification system is impaired. SUMMARY OF THE INVENTION It is an object of the present invention to simplify operation and improve reliability by making a plurality of D channels of an ISDN line available.

[0012]

The emergency call system according to the present invention has the following features. (1) The terminal devices 1-1 to 1-n and the center 2 are connected by an ISDN line, and the terminal devices 1-1 to 1-n are connected. n
Is an emergency notification system for transmitting emergency information from a network to a center 2. The center 2 includes a plurality of processing units 4-1 to 4-k mutually connected by a local area network 5.
And line processing units 3-1 to 3-m for connecting between these processing units 4-1 to 4-k and the ISDN line.
The terminal devices 1-1 to 1-n include a setting table 10 in which a plurality of report destination numbers corresponding to a plurality of line corresponding units 3-1 to 3-m of the center 2 are set, and a plurality of setting destinations set in the setting table 10. Using the first destination number defined among the destination numbers, a packet is transmitted by the D channel of the ISDN line, and when the reception confirmation of the packet from the center cannot be obtained, the packet is set in the setting table. And a communication control unit for retransmitting the packet by the D channel using the next report destination number.

(2) In the setting table of the terminal devices 1-1 to 1-n, at least the first report destination number defined among the plurality of report destination numbers is different between the groups of the plurality of terminal devices. It has a configuration that is set to perform.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram of an embodiment of the present invention.
-1 to 3-m are line corresponding units, 4-1 to 4-k are processing units,
5 is a LAN (local area network), 6 is an ISDN switching network, 7 is a processor (CPU), 8 is a random access memory (RAM), 9 is a read only memory (ROM), 10 is a setting table, and 11 is a communication. A control unit, 12 is a display unit, 13 is an interface unit, 14 is an internal bus, and 15 is a sensor (or a notification button).

Each of the terminal devices 1-1 to 1-n has an ISDN
(Integrated Services Digital Network) Switching Network 6
To communicate with the center 2 via the Internet. In this case, packet communication using the D channel of the ISDN line is performed. Read only memory 9
Is a writable configuration such as an EEPROM or the like, and forms a setting table 10 in which a plurality of report destination numbers for the center 2 are assigned and set. This setting table 10 is used to set a report destination number corresponding to the terminal devices 1-1 to 1-n, or to set the terminal devices 1-1 to 1-1 from the center 2.
It can be set by downloading by specifying -n.

During operation of the terminal devices 1-1 to 1-n, the setting table 10 in the read only memory 9 is expanded in the random access memory 8, and the processor 7 is expanded in the random access memory 8. By referring to the setting table, the communication control unit 11 is controlled to perform communication with the center 2. The display unit 12 includes a liquid crystal display panel or the like, and can display status information, operation guidance, and the like.

The notification button and the detection signal of the sensor 15 are read by the processor 7 through the interface unit 13 to judge whether or not an emergency notification should be made. In the case of such a detection signal of the sensor, etc., an emergency call is required, so that an automatic call is made to the center 2 via the communication control unit 11 with reference to the setting table.

In this case, the IS between the ISDN switching network 6
The DN line has two B (64 kbps) channels and one D (16 kbps) channel.
A plurality of packet-type access connections are set between -1 to 1-n and the center 2. Then, at the time of an emergency call, the emergency call information using the first packet-type access connection is set to the highest call destination number among the plurality of call destination numbers set in the setting table 10 as the first call destination number. When the packet is sent to the center 2 and no acknowledgment is received,
Using the next report destination number set in the setting table 10, the emergency report information is resent to the center 2 as a packet through the second packet-type access connection.

Therefore, when the reception confirmation of the emergency notification information by the first packet-type access connection cannot be obtained due to a failure of the line handling unit or the processing unit of the center 2, retransmission is performed by the next second packet-type access connection. be able to. In addition, since the charges for the terminal devices 1-1 to 1-n in such packet communication are in units of packets, the cost of the terminal devices 1-1 to 1-n required for an emergency call can be reduced. .

FIG. 2 is an explanatory diagram of the format of a packet, in which LAPD (Link Access Procedure (Protocol)
) On the D-chnnel), and sets a 2-octet address field, a 1- or 2-octet control field next to the start flag sequence "01111110", and then emergency information, etc. Information field, followed by a 2-octet frame check sequence (FCS; Frame Check Sequence).
ncy), then the end flag sequence “0111111”
0 ".

The SAPI in the address field is a service access identifier (Service Access Point I).
dentifire), TEI is a terminal termination identifier (Terminal E)
ndpoint Identifire), C / R is a command / response (Command / Responce), and EA is an extension display bit (Address Field Extension).

The service access identifier SAPI is "0" for a call control signal and "1" for packet data.
6 ”,“ 62 ”for test and maintenance, and“ 6 ”for management
3 "is defined. The terminal termination identifier TEI is
“0” to “126” are point-to-point connections, and “1”
27 "is assigned to the broadcast mode. That is, in the case of a normal call setup packet, the service access identifier SAPI is set to “0”. In the case of a packet used in the embodiment of the present invention, the service access identifier SAPI is set to “16”. Further, the terminal termination identifier TEI when transmitted from the terminal device is set in the setting table 10 and becomes the report destination number.

The terminal devices 1-1 to 1-n (see FIG. 1)
A plurality of terminal termination identifiers TEI so that packet communication can be selectively performed with a plurality of line corresponding units of the center 2.
Is requested to the ISDN exchange network 6 and set in the setting table 10. That is, this is equivalent to the case where addresses of a plurality of line corresponding units of the center 2 are set, and a plurality of packet-type access connections can be set.

FIG. 3 is a sequence explanatory diagram of the embodiment of the present invention, showing an outline of packet transmission and reception between the terminal devices 1-1 to 1-n and the center 2. Call request packet CR from the terminal device to a certain line-corresponding part of the center
When (A) is transmitted, it indicates that the call accepting packet CA cannot be received within the predetermined time T due to a failure of the line corresponding unit or the processing unit. A call request packet CR (B) is transmitted.

When the call request packet CR (B) is received by the normal line corresponding unit of the center, the call reception packet C (B) is received.
Send A. The terminal device transmits the call reception packet CA
Is received within the predetermined time T, a data packet DP including emergency call information is transmitted. When receiving the data packet DP, the center transmits a reception enable packet RR indicating that the next data packet can be received. The terminal device transmits the data packet DP again when there is a lot of emergency report information, but transmits a termination packet CQ when the transmission of the emergency report information is completed. When receiving the end packet CQ, the center transmits an end confirmation packet CF.

Communication control unit 11 of terminal device 1-1 to 1-n
When the above-mentioned call request packet CR is transmitted (see FIG. 1), a timer (not shown) is started to monitor whether or not the call accepting packet CA from the center 2 has been received within a predetermined time T. . Such a function can be easily realized by a processing function such as a processor.

FIG. 4 is an explanatory diagram of a report destination number according to the embodiment of the present invention. In the case where the center 2 duplicates the same configuration as the configuration shown in FIG. The case where the system is divided and the system 0 and the system 1 are duplicated is shown,
The master device is shown as 2A and the slave device is shown as 2B. Note that a configuration can be employed in which the main device 2A and the slave device 2B are connected via a local area network (LAN) as in the case shown in FIG. Also, terminal devices 1-1 to 1--1
n indicates a case where the first report destination number and the second report destination number are set in the setting table 10, and in this case, the terminal device 1-
A group of 1, 1-2,... Designates a first report destination number as TEI1,
The second report destination number is TEI2, and the terminal devices 1-n, 1-
The group of (n−),... Represents the first report destination number as TEI2,
The case where the second report destination number is TEI1 is shown. That is, the call destination number is assigned to the group correspondence of the terminal devices 1-1 to 1-n so that the call is not concentrated only on the main device 2A of the center 2 and the call is distributed to the main device 2A and the slave device 2B. Is set.

Therefore, the terminal device 1-1 sends the IS to the main device 2A of the center 2 by the first destination number TEI1.
The terminal device 1-1 performs packet communication using the D channel of the DN line and retransmits the packet to the slave device 2B of the center 2 using the second report destination number TEI2 when the reception confirmation for the packet cannot be obtained. Become. Similarly, the terminal device 1-n performs packet communication with the slave device 2B of the center 2 using the first report destination number TEI2, and when no reception confirmation is obtained, uses the second report destination number TEI1. It will be retransmitted to the main device 2A of the center 2.

FIG. 5 is a flowchart when the power of the terminal device is turned on. When the power of the terminal devices 1-1 to 1-n is turned on, the processor 7 (see FIG. 1) clears the random access memory 8 (RAM). Then, the contents of the setting table 10 of the read only memory 9 (ROM) are expanded to the random access memory 8 (RAM) (A1).
2). Then, the processor 7 determines whether the report destination number (data) is set in the setting table 10 expanded in the random access memory 8 (RAM) (A
3) If it has been set, the operation is started, and if it has not been set, the setting table 10 is expanded again.

FIGS. 6 and 7 are flow charts of the operation of the terminal device, in which it is determined whether or not the first report destination is in the connected state (B1). It is determined whether or not it is (B11). That is, the terminal device periodically monitors the connection state between the connection destination according to the first report destination number and the connection destination according to the second report destination number by the packet-type access connection.

If the connection is not established in steps (B1) and (B11), the following steps (B2) to (B2)
(B10) and (B12) to (B20) are executed. That is, referring to the setting table 10 (B2), (B12),
Perform connection processing to the first report destination or the second report destination (B3), (B
13), it is determined whether or not the connection is OK (B4), (B1)
4) If the connection is not OK, the connection status is updated based on the connection processing result (B5), (B15), and step (B5).
In the case of, the process proceeds to step (B11),
In the case of 5), the process proceeds to step (B1).

If the connection is OK in steps (B5) and (B15), a line connection notification is transmitted to the center in a data packet (B6) and (B16), and the connection state is updated based on the connection processing result (B6). ), (B16). That is, each of the terminal devices 1-1 to 1-n manages a connection state to the center 2, and performs update control of the connection management information according to the connection state. Also, it is determined whether or not there is data to be transmitted to the center 2 (B8) and (B18). If there is untransmitted data, the untransmitted data is transmitted to the center 2 (B9) and (B19). (Buffer by the random access memory 8) is cleared (B10) and (B20).

FIG. 8 is a flowchart when a report event occurs in the terminal device. When a report event occurs to the center 2 due to pressing of the report button or detection by the sensor 15 (C
1), refer to the first report destination connection state (C2). That is,
The connection status of the first report destination is referred to based on the connection management information described above. Then, it is determined whether or not the connection status of the first notification destination is normal (C3). If the connection status is normal, a notification event is transmitted to the center 2 (C4). That is, a report is sent to the center 2 by a packet to which the first report destination number is added, using the D channel of the ISDN line.

If the connection status of the first report destination is not normal, the connection status of the second report destination is referred to (C5),
It is determined whether or not the connection state of the report destination is normal (C6). If not, it is held as untransmitted data in a buffer (the buffer formed in the above-described random access memory 8) (C8), and the process is terminated once. I do. If the connection status of the second report destination is normal, a report event is transmitted to the center (C
7). Therefore, the report event is sent to the first report destination at the center 2.
If it is not possible to report to the second report destination, the report can be made automatically.

FIG. 9 is a flowchart of the reception process at the center. The center monitors the presence or absence of a call from the terminal device via the D channel of the ISDN line.
It is determined whether there is data received from the terminal device (D1). If there is received data, it is determined whether or not the data is line connection notification data (D2). When the transmission of the line connection notification in B6) is supported, the terminal device connection status is updated to the normal connection (D3).

If it is not the line connection notification data, it is determined whether or not it is a report event (D4).
A process corresponding to the contents of the reception report event is performed (D
5). If the event is not a report event, the process is terminated, or it can be determined whether or not the received data is another type.

[0037]

As described above, according to the present invention, a plurality of line handling units 3-1 to 3-m and a plurality of processing units 4-1 to 4-m are provided.
k, and a plurality of terminal devices 1-1 to 1-n connected to the center 2 via the ISDN switching network 6. 2 is configured to transmit emergency notification information by a D-channel packet to a plurality of line-corresponding units, and the reception confirmation from the center 2 for the packet transmitted for the emergency notification is performed by the line-corresponding unit or If it cannot be obtained within a predetermined time due to a failure of the processing unit, etc., the same packet is sent to another line corresponding unit based on the report destination number set in the setting table 10, so that it is ensured. It is possible to make an emergency call to the center 2. Further, by performing the packet communication, the charge to the terminal devices 1-1 to 1-n on the transmission side is based on the flow rate of the packet, and thus there is an advantage that the burden can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a packet format.

FIG. 3 is a sequence explanatory diagram of the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a report destination number according to the embodiment of this invention.

FIG. 5 is a flowchart when the terminal device is powered on.

FIG. 6 is a flowchart during operation of the terminal device.

FIG. 7 is a flowchart during operation of the terminal device.

FIG. 8 is a flowchart when a notification event occurs in the terminal device.

FIG. 9 is a flowchart of a reception process of the center.

FIG. 10 is an explanatory diagram of a conventional emergency call system.

FIG. 11 is an explanatory diagram of a duplex configuration emergency call system of a conventional example.

[Explanation of symbols]

 1-1 to 1-n Terminal device 2 Center 3-1 to 3-m Line handling unit 4-1 to 4-k Processing unit 5 Local area network 6 ISDN switching network 7 Processor (CPU) 8 Random access memory ( RAM) 9 read-only memory (ROM) 10 setting table 11 communication control unit 12 display unit 13 interface unit 14 internal bus 15 sensor

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (2)

[Claims] 1. An emergency notification system for connecting a terminal device to a center by an ISDN line and transmitting emergency information from the terminal device to the center, wherein the centers are mutually connected by a local area network. A plurality of connected processing units, and the processing unit and the ISD
A line correspondence unit for connecting with the N lines, wherein the terminal device has a setting table in which report destination numbers corresponding to a plurality of line correspondence units of the center are set; A packet is transmitted through the D channel of the ISDN line using the first report destination number defined in the report destination number, and when the reception confirmation of the packet from the center cannot be obtained, the packet is set in the setting table. And a communication control unit for retransmitting a packet through the D channel using the next report destination number. 2. The apparatus according to claim 1, wherein the setting table of the terminal device is configured such that at least an initial report destination number defined among a plurality of report destination numbers is set to be different between a group of a plurality of terminal devices. The emergency call system according to claim 1, wherein the emergency call system is provided.