JP2001339464A - Remote supervisory control unit connected to radio network and terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a remote controller which can reduce the loads on a terminal and a key station even in a system which uses a wide-area radio network without requiring any special facilities, etc. SOLUTION: This remote supervisory control unit 1 is connected to a portable telephone set 3 whose line is connected to a radio network 2 (Dopa network) and a terminal 4 which sends and receives data on a non-procedual basis. This remote supervisory control unit is equipped with a calling and terminating function to and from the radio network 2 when sending data to a center 5 and sends the data as a client machine and then functions as a server to send data to the terminal 4 on the non-procedual basis when receiving the data from the center 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and control device connected to a wireless network for charging according to the amount of data and to a terminal device for transmitting and receiving data via a serial line without any procedure. The present invention relates to a remote monitoring and control device that controls a terminal device that transmits and receives data in accordance with a procedure and a wireless network to smoothly perform communication with a master station.

[0002]

2. Description of the Related Art In recent years, a system has been constructed in which a terminal and a master station communicate using the Internet.

The Internet is a global network in which personal computer communication networks such as the commercial Internet, academic-related Internet, PC-VAN (registered trademark), and NIFTY-Serve (registered trademark) are interconnected, each of which is a unique communication protocol. .

Further, a terminal incorporating a computer into an existing device (for example, a pump control device or the like) for transmitting data without any procedure is constructed, and this terminal is connected to the Internet or LAN.
In some cases, the system communicates with the master station via a network such as the above.

[0005] In other words, even in such a system, since it is communication between computers using a wire, a unique communication protocol is used.

For this reason, in order to smoothly communicate with various systems, a protocol conversion device is provided in a network and a terminal.

[0007]

In recent years, a network system using a wireless network (DoPa (registered trademark) network) such as a PHS and a mobile phone has been receiving attention.

[0008] This is because the pay-as-you-go billing is based on the data amount, so that the communication can be continued without worrying about the time and distance, and the high-speed data transmission is possible even in a wireless network. .

[0009] However, the above-described protocol conversion device is used for smooth communication between a terminal having a communication protocol that is incompatible with each other and a master station when the terminal and the master station are connected by wire. Since the protocol conversion is performed, if the network is a wireless network, it cannot be used.

[0010] Further, since the master station and the terminal connected to the wireless network have their own communication protocol, there is a problem that even if the network is a wireless network, a converter must be provided separately.

Further, in general, the master station has only the function of the master station, and the slave station has only the function of the slave station.

However, since the master station must communicate with various slave stations of the constructed system, there is a problem that the master station is overloaded.

When the terminal is connected to various control devices, sensors, and the like, it is necessary to monitor the status of these control devices and sensors and perform predetermined control. There was a problem that the terminal was overloaded when data was sent to the station.

In particular, in a manhole pump facility used as a sewage pumping system for efficient maintenance of a small-scale sewer, recently, as shown in FIG. 8, serial data from a pump sensor in the manhole facility is transmitted. The data is received by the control panel and transmitted to the central monitoring device via the public network, and the control data from the central monitoring device is transmitted to the pump or the like of the manhole facility via the public network.

In such a system, a computer capable of communicating with the central monitoring device via a wired network is attached to the control panel. In other words, using a conventional facility for controlling manhole facilities using serial data, data such as failure occurrence time, details, data storage, and flow rate management are sent to the central monitoring device.

In such a system, the communication protocol is a communication protocol conforming to the specifications of the company A having the control panel. Also, even if a protocol conversion device is used, since the protocol conversion device is wired,
There is a problem that it cannot be used for a wireless network such as a Dopa network.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Even in a system using a wide area wireless network, the load on a terminal and a master station can be easily reduced without requiring special equipment. An object is to obtain a remote control device that can be reduced.

[0018]

A first aspect of the present invention relates to a portable network which includes a wireless network for charging according to the amount of data, a terminal device for transmitting and receiving data via a serial line without any procedure, and a master station. It is a remote monitoring control device that connects a line using a telephone.

This remote monitoring and control device is provided between the mobile phone and the terminal device, and is means for monitoring whether there is data to be transmitted from the terminal device or whether there is a line connection request from the master station, If there is, after connecting the line with the mobile phone by the protocol of the AT command, means for connecting the line to the master station via the wireless network by the ppp protocol, and after connecting the line to the master station, Client that requests a synchronous segment to establish a TCP connection, and transmits data from the terminal device to the TCP / I
Means for transmitting in the packet format of the P protocol, and TCP
Means for receiving, when a connection is established, packet-format data of the TCP / IP protocol from the master station, dividing the data into byte units, and sending the byte-unit data to the terminal device without procedure. Is the gist.

A second aspect of the present invention is a mobile phone,
Means for disconnecting a TCP connection when data is transmitted from the terminal device to the master station when the line is connected to the wireless network or the master station and the data does not exist even after a predetermined time has elapsed;
Immediately after disconnection of the connection, the device enters a server mode in which the device is in a state of waiting for reception of the synchronous segment,
The point is that a means for re-establishing a TCP connection is provided.

A third aspect of the present invention is a pump monitoring panel for transmitting and receiving data from each sensor of the pump unit or data from the master station to the terminal device and controlling each valve of the pump unit.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The terminal in the present embodiment is a pump control panel of a manhole facility, a printer, a monitoring camera,
It transmits and receives data through a serial line such as a handy terminal without any procedure.

FIG. 1 is a schematic configuration diagram of a remote monitoring control device according to an embodiment of the present invention.

The remote monitoring and control device 1 includes a wireless network 2 (D
opa network) and a terminal 4 that transmits / receives data in a non-procedural manner. When data is transmitted to the center 5, a call originating / receiving function for the wireless network 2 is provided. To send data as a client machine,
When receiving the data from the center 5, it becomes a server and transmits the data to the terminal 4 without any procedure.

The center 5 is connected via a LAN 7 to a router 6 connected to the wireless network 2.

The terminal 4 is connected to the remote monitoring and control apparatus 1 by RS232C, and has no communication protocol for connecting to an intranet environment, such as a pump control panel, a printer, a monitoring camera, a handy terminal or a sensor. It is.

As shown in FIG. 1, the remote monitoring control device 1 forms a waveform of non-procedural data from the terminal 4 and sequentially stores it in the reception buffer 11.
And a plurality of non-procedural data stored in the reception buffer 11 is divided into a predetermined number of
Data division processing unit 12 to be sent to IP transmission processing unit 20
And a data transmission processing unit 13 for restoring data from the TCP / IP transmission processing unit 20 and storing the data in the transmission buffer 14.
A non-procedural conversion unit 15 that divides the data into one byte each time data is sent to the transmission buffer 14, and a data transmission processing unit 16 that sends one byte of data from the transmission buffer 14 to the terminal 4. Have.

The TCP / IP transmission processing section 20 maintains the reliability of the communication path from the start to the end of communication, sets a normal data control and a connection-oriented virtual communication path, and establishes a virtual communication path of the upper layer. TCP (Transmission) that provides a full-duplex / bidirectional stream service to the user (send it as a bit string and send it in byte units)
n control protocol, and controls transmission and reception of data packets within and between networks (IP address, disassembly and assembly of IP data,
IP to control the communication path until the data reaches the partner
(Internet protocol).

Also, the client mode processing unit 17
A server mode processing unit 18 and a client / server selection processing unit 19 are provided.

This client / server selection processing section 19
Monitors the TCP / IP transmission processing unit 20 and activates the client mode processing unit 17 when sending data to the server side.

The client / server selection processing unit 1
9 activates the server mode processing unit 18 when there is data to be sent to the terminal side.

When the client mode processing unit 17 is selected by the client / server selection processing unit 19,
After transmitting the synchronization segment and receiving an acknowledgment of the synchronization segment from the receiving side, the user logs in to the server of the IP address to be connected in order to establish a TCP connection.

When selected by the client / server selection processing unit 19, the server mode processing unit 18
/ IP transmission processing unit 20 is set to a TCP session request waiting state. Then, when there is a TCP session request, an acknowledgment is returned, the data is received, and data of a processing result according to the received data is transmitted to the terminal.

The AT command connection processing section 22 connects a line with the mobile phone 3 and the wireless network 2 using an AT command protocol.

The ppp connection processing unit 23 (point to
The “point protocol” establishes a line with the wireless network 2.

The AT command connection processing unit 22, ppp
The connection processing unit 23 is generally referred to as a line connection processing unit 25. Further, the line connection processing unit 25 sets A
A process is provided for activating the T command connection processing unit 22 and the ppp connection processing unit 23 to connect a line with the center side.

The non-procedural conversion processing unit 15 converts the data (referred to as TCP data in this embodiment) from the TCP / IP transmission processing unit 20 into a TCP header, an IP header, and a ppp.
A frame is extracted and divided into byte units and stored in the transmission buffer 14.

The operation of the remote monitoring control device configured as described above will be described below with reference to the sequence diagram of FIG.

The line connection processing unit 25 of the remote control device 1 (also simply referred to as the present device) activates the AT command connection processing unit 22 at regular intervals, and stores the telephone number of the center in the AT command connection processing unit 22. Set.

The AT command connection processing section 22 causes the mobile phone 3 to make a dial call with the set telephone number (d1), and establishes a line connection with the center 5 via the wireless network 2 (d2). Then, when the response code (CD code) is transmitted from the mobile phone 3 (d3), it is determined that the line connection with the wireless network 2 is established. Next, the PPP connection processing unit 23 is activated to establish a ppp link with the wireless network 2 (d
4).

When non-procedural data from the pump control panel, which is the terminal 4, is sent to the TCP / IP transmission processing unit 20 via the data reception processing unit 10, the reception buffer 11, and the data division processing unit 12. (D5), client /
The server switching processing section 19 is a client mode processing section 17
Start up.

Next, the client mode processing unit 17
To the center 5 using the TCP / IP transmission processing unit 20,
A connection is established by requesting a TCP connection (d6). That is, the present apparatus is a client machine.

Each time non-procedural data is received from the terminal 4, the data is sent by TCP / IP (d
7). At this time, non-procedural data in the receiving buffer 11 is accumulated, and these data are divided into predetermined units and
The P address is added and transmitted.

The above-described data transmission processing (d7) will be described in detail below with reference to FIGS.

For example, as shown in FIG. 3, non-procedural data from the terminal is digitally converted by an A / D converter (not shown), and the non-procedural data is transmitted to the reception buffer 11 by the reception processing unit 10. They are sequentially stored (S20).

That is, as shown in FIG. 4, non-procedure 1-byte data is sequentially stored in the reception buffer 10.

Next, the line connection processing unit 25 determines whether or not the ppp link has been established (S30). If not, the line connection processing unit 25 automatically executes the AT command processing and the ppp connection processing. A line connection with the mobile phone 3, the wireless network 2, and the center 5 is established (S40),
Thereafter, the mode is switched to the client mode (activation of the client mode processing unit), and the TCP connection is established as described above (S50).

If it is determined in step S30 that the ppp link has been established, the process immediately proceeds to step S50 to establish a TCP connection.

Then, a preset IP address of the server is read from a ROM (not shown) (S6).
0).

Next, the data division processing unit 12 divides a plurality of nonprocedural data stored in the reception buffer 10 into a set of predetermined data as shown in FIG. 4B (S).
70). In FIG. 4B, eight sets of nonprocedural data are set as one set.

Then, as shown in FIG. 4C, a packet is generated by adding an IP header and a TCP header based on the read IP address to a predetermined number of nonprocedural data (S80). The data is transmitted to the center 5 via the wireless network 2 (S90).

When the device 1 is a client machine, the wireless network 2 and the portable telephone 3 are transmitted from the center 5 side.
When the TCP / IP transmission processing unit 20 receives the TCP data via (d8), the data is transmitted to the non-procedural processing unit 15
The TCP header, the IP header, and the ppp frame are removed by the transmission buffer 1
4. The data is sent to the terminal 4 via the data transmission processing unit 16.

For example, as shown in FIG. 5A, when TCP data to which an IP header and a TCP header are added is received from the center 5 via the wireless network 2 and the portable telephone 3, the data restoration processing unit As shown in FIG.
The header and the TCP header are extracted and restored, and are stored in the transmission buffer 14 as shown in FIG.

The non-procedural conversion unit 15 extracts a plurality of data stored in the transmission buffer 14 byte by byte as shown in FIG. 5D, and sends the data to the terminal as non-procedural data.

If no data is transmitted from the terminal 4 for a certain period of time, a disconnection monitoring timer (not shown) of the line connection processing unit 25 automatically operates, and the TCP connection with the center 5 is disconnected (d9).

At this point, a TCP connection is automatically established so that the center 5 becomes a client and the device 1 becomes a server (d10).

That is, the apparatus 1 and the center 5 are connected via the mobile phone 3 and the wireless network 2 while the line is connected.
The device disconnects the CP connection, and the device 1 becomes a server, the center 5 becomes a client, and the TCP
Establish a connection.

That is, the client / server selection processing section 19 selects the server mode processing section 18 and selects the TCP / I
The P transmission processing unit 20 is set to a state of waiting for a TCP session request, and becomes a server machine.

The center 5 transmits the synchronization segment to the portable telephone 3 via the wireless network 2 and, after receiving the confirmation response of the synchronization segment from the apparatus 1, becomes a client machine which logs in as establishing a TCP connection. .

Similarly, the TCP from the center 5
The data is stripped of the TCP header, the IP header, and the ppp frame, and is converted into 1-byte units.
4. The data is sent to the terminal 4 via the data transmission processing unit 16 (d11).

On the other hand, when a line is connected to the apparatus from the center, the center is a client and the apparatus is a server, as shown in FIG.

Then, TCP is transmitted from the center 5 to the wireless network 2.
A connection request is made (d20), a telephone line connection is made from the wireless network to the portable telephone 3 (d21), and a telephone call is made from the portable telephone 3 to the device 1 to establish a connection (d22, d23).

Then, after establishing the PPP link (d24), the device 1 establishes a TCP connection between the device 1 and the center 5.
The connection is automatically established (d25). That is, the center 5 side becomes a client, and the remote monitoring control device 1 becomes a server.

Thereafter, TCP data is transmitted from the center 5 side (d26), and the device 1 sends this data to the terminal for each byte (no procedure) (d27).

On the other hand, as shown in FIG. 7, the data exchange between the pump unit and the center may cause a trouble such as disconnection of the telephone line.

When a TCP connection is established between the device 1 and the center side 5 and, for example, non-procedural data from the terminal 4 is transmitted to the center 5 by TCP data, the device 1 and the wireless network When the telephone line to the server 2 is disconnected and a failure occurs (d30), the center 5 serving as a server monitors the timer (d31), and disconnects the TCP connection after a certain period of time (d31).

On the other hand, when the telephone line is disconnected, the mobile phone 3 sends a no-carrier signal to the apparatus 1 (d3
3).

As a result, the line connection processing 2
5 again calls the mobile phone 3 which is a mobile arc by an AT command to establish a telephone line and a ppp link with the wireless network 2 and the center 5 (d34, d35, d3).
6, d37).

Then, the present apparatus 1 again becomes a client and establishes a TCP connection with the center 5 (d)
38) Then, the non-procedural data from the terminal 4 is transmitted to the center 5 (d39).

As described above, the present apparatus 1 periodically performs Dop
Non-procedural data from terminal 4 (data from various sensors such as water level sensor, flow rate sensor, pressure sensor, etc. attached to pump unit) in a state where terminal 4 and center 5 are connected to each other using network a. Is collected, the non-procedural data is converted into data by performing TCP / IP and PPP framing, and transmitted to the center 5 through the wireless network 2.

The TCP data from the center 5 is transmitted to the terminal as 1-byte nonprocedural data.

Therefore, since there is no data transmission / reception due to the transmission through the Dopa network, no charge is made even when the line is connected, so that the sequential data communication can be performed while maintaining the line. Further, the communication fee per packet can be reduced. In addition, telephone line construction on the slave station side is not required.

Further, when remote control is performed by connecting to the Internet, it becomes possible to receive services such as WWW and electronic mail on the Internet. Further, since the authentication is performed using the IP address and the telephone number, data security is high.

The data transmission and non-procedural data TC
Since all conversions to the P / IP protocol are automated, quick data transmission is possible.

Further, data transmission control can be performed from both sides, and flexible data transmission can be performed according to the state of the master station and the slave station.

[0076]

As described above, according to the present invention, a remote monitoring control device is provided between a wireless network for charging according to the amount of data and a terminal device for sending and receiving data in a non-procedural manner. When there is data to be sent from the terminal device by the control device, an AT command is automatically sent to the portable radio device using the ppp protocol.
After establishing a line with the wireless network and the master station, it automatically becomes a client function, establishes a TCP connection, and transmits data from the terminal device using the TCP / IP protocol.

When data in a packet format is transmitted from the master station, the data is transmitted to the terminal device as nonprocedural data obtained by dividing the data into 1-byte units.

Therefore, only by installing this device between the existing terminal device and the wireless network, the non-procedural data from the terminal is automatically converted to the TCP / IP protocol, and the data is transferred via the wireless network. The effect of being able to transmit is obtained.

When the data in the packet format is 1 from the master station,
Since the data is converted into nonprocedural data in byte units, there is an effect that modification of existing terminal devices and telephone line construction are not required.

Further, since the remote control monitoring device transmits and receives data from the master station while the line is connected to the master station via a wireless network for charging according to the data amount, the communication charge per packet is reduced. The effect is that data can be received from the master station without concern.

Further, the remote control / monitoring device disconnects the TCP connection while keeping the line connected to the master station via a wireless network for charging according to the data amount, and automatically re-opens the TCP connection again.
Since the server function is performed by establishing the CP connection, the effect of being able to receive data from the master station without worrying about the communication fee per packet is obtained.

Further, since the present apparatus automatically performs the protocol conversion to the master station via the wireless network and the protocol conversion to the terminal apparatus via the wireless network, the terminal apparatus and the master station are overloaded. The effect that it does not become is obtained.

In particular, when this apparatus is connected to a control panel for controlling and monitoring the pump unit, an effect is obtained in that the protocol for data transmission / reception can be converted without regard to the line usage fee.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a portable remote monitoring control device of the present embodiment.

FIG. 2 is a terminal device, a remote monitoring control device according to the present embodiment,
It is a sequence diagram with a mobile telephone, a wireless network, and a center.

FIG. 3 is a flowchart illustrating an operation of the remote monitoring control device of the present embodiment.

FIG. 4 is an explanatory diagram illustrating packet conversion of data from a terminal device.

FIG. 5 is an explanatory diagram illustrating conversion of data from a center into nonprocedural data.

FIG. 6 is a sequence diagram of a terminal device, a remote monitoring control device, a mobile phone, a wireless network, and a center in response to a request from the center according to the present embodiment.

FIG. 7 is a sequence diagram when a telephone line is disconnected during data transmission / reception according to the present embodiment.

FIG. 8 is an explanatory diagram illustrating a problem.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 remote monitoring control device 2 wireless network 3 mobile phone 4 terminal 5 center 6 router 7 LAN 11 reception buffer 12 data division processing unit 15 non-procedural conversion unit 17 client mode processing unit 18 server mode processing unit 19 client / server selection processing unit 20 TCP / IP transmission processing unit

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Claims (3)

[Claims] 1. A wireless network for charging according to the amount of data,
A terminal device for transmitting and receiving data via a serial line without any procedure, and a remote monitoring control device for connecting a line using a mobile phone to a network composed of a master station, wherein a remote monitoring control device is provided between the mobile phone and the terminal device. Means for monitoring whether there is data to be sent from the terminal device or whether there is a line connection request from the master station. If there is the data to be sent, a line is connected to the mobile phone by an AT command protocol. Means for connecting a line to the master station via the wireless network using the ppp protocol, and after connecting the line to the master station, a request for a synchronization segment is made to the master station to establish a TCP connection. Becomes a client that establishes the T
Means for transmitting in a packet format of the CP / IP protocol; and, after the establishment of the TCP connection,
Means for receiving data in a packet format of the P / IP protocol, dividing the data into bytes, and transmitting the data in bytes to the terminal device in a non-procedural manner; Remote monitoring and control device connected to the device. 2. When a line is connected to the mobile phone, the wireless network, and the master station from the device side, and when data to be sent from the terminal device to the master station does not exist even after a predetermined time has elapsed, Means for disconnecting a TCP connection, and means for immediately reestablishing the TCP connection by setting the apparatus to a server mode in which the apparatus is in a waiting state for receiving the synchronization segment immediately after the disconnection of the TCP connection. A remote monitoring and control device connected to the wireless network according to claim 1 and a terminal device. 3. A pump monitoring panel for transmitting and receiving data from each sensor of the pump unit or data from the master station to the terminal device to control each valve of the pump unit. Or a remote monitoring and control device connected to the wireless network and the terminal device according to 2.