JP2000287282A - Remote control system for network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a remote control system for a network that can remotely control a transmitter connected in cascade (in subordinate) to other transmitters. SOLUTION: A reception section 201 at a transmission line side receives outgoing data 2A from other transmitter acting like a remote controller. A control information detection section 202 detects control information. A controller identification section 204 discriminates whether or not an identification code included in the detected control information denotes a transmitter connected to a terminal side. When this identification code indicates the transmitter connected to the terminal side, an identification code revision section 205 changes the identification code into an identification code in matching with the transmitter of the terminal side. A control command insertion separation section 203 separates the outgoing data, insets the revised identification code to the outgoing data and outputs the resulting data from a corresponding port.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network remote control system for remotely controlling a transmission device used in a high-speed digital line network or the like.

[0002]

2. Description of the Related Art Conventionally, remote control of a network such as a high-speed digital circuit network has been performed as a remote control device.
Is performed between one transmission device and one transmission device functioning as a controlled device, and remote control can be performed only between two transmission devices connected to each other via a transmission path. Had become.

When remote control is performed between two opposing transmission devices, one of the transmission devices functioning as a remote control device includes a control time slot (TS) provided for performing a predetermined remote control. ), A control command for the controlled device including an identification code for confirming the device type is entered and transmitted. The other transmission device, which is the controlled device, executes the received control command when the identification code included in the received control command matches the identification code of the own device. In the remote control, a control status including alarm information and the like in addition to the control command is transmitted to the controlled device as control information.

FIG. 4 shows an example of a data structure of control information such as a control command. In the figure, control information used in the conventional remote control includes six code areas D1, D
2, D4 to D7. Here, the code area D1 is
Defines a code representing the model of the transmission device,
Unless the device is changed, a fixed code (for example, an initial of the device) is described. The code area D2 defines the command or status as the control information,
If it is a command, code [C] is described, and if it is status, code [S] is described.

[0005] The code area D4 is an identification ID of the transmission device.
(Type), for example, the following codes “A” to “C” are described. Code "A": 1.5M 2ch type Code "B": 1.5M 4ch type Code "C": 6.3M 4ch type

The code area D5 defines the content of the control information, and is a code (for example, alphabet 2) determined in advance according to the content of the command or status.
Character + code consisting of 1 to 7 characters).
The code areas D6 and D7 define a code relating to the end of the control information. In this example, "CR (carriage return)" and "LF (line feed)" are described.

[0007]

By the way, in the above-described remote control according to the prior art, the data for remote control transmitted from the transmission device functioning as the control device is composed of the identification ID defined in the code area D4. Are matched and detected by the device facing the control device and processed as a control command, but no control data is sent to the device connected to the terminal side. Therefore, devices connected in cascade (subordinate) to the transmission device cannot be controlled.

Here, for example, if one time slot (1TS) of a main signal sent to a device connected in cascade to a device connected to the control device is used as a control channel, control is possible. As many time slots (TS) as the number of controlled devices are required as control channels, which is not a practical measure.

The present invention has been made in view of the above circumstances, and has as its object to provide a network remote control system capable of remotely controlling a transmission device connected in cascade (subordinate) to the transmission device. And

[0010]

In order to solve the above-mentioned problems, the present invention has the following arrangement. That is, the present invention is a remote control system for a network including a plurality of transmission devices connected to each other via a transmission path and a transmission device connected to a terminal of the transmission device. Identifies the destination of the control information contained in the data transmitted from the transmission device functioning as the remote control device, and adapts the data to the transmission device on the terminal side when the transmission destination is the transmission device on the terminal side A first data transfer unit (for example, a transmission line side receiving unit 201, a control information detecting unit 202, a control command inserting / separating unit 203, a control device identifying unit 204, and an identification code changing unit 205, which are described later). And a second data transfer means (for example, a transmission path transmission unit to be described later) for transferring data from the transmission apparatus on the terminal side to the transmission path side. 08, the control information insertion unit 209, the control information detecting multiplexing unit 2
(Components corresponding to the circuit elements consisting of 10).

According to the present invention, when each transmission device provided in the network receives data transmitted from another transmission device functioning as a remote control device, the transmission device of the control information contained in the data is transmitted to the transmission device. Identify. If the transmission destination is a terminal-side transmission device, the received data is changed to a data format compatible with the terminal-side transmission device and transferred. Here, when changing the data format, the code format of the received data is changed to, for example, a code format for recognizing that the data is to be controlled. In other words, when the transmission destination is the terminal side, each transmission device that has received the control information changes the code indicating the transmission destination to a code indicating that the control target is the own device, and transmits the data to the terminal side. Send. The transmission device on the terminal side recognizes that the control target is its own device from the changed code, and accepts the control information. Therefore, it is possible to remotely control the transmission device connected to the terminal.

The first data transfer means includes, for example, a transmission line side receiving unit (201) for receiving downlink data from the transmission line side, and a control information detection unit for detecting control information of a control time slot from the downlink data. Part (202);
A control device identification unit (204) for determining an identification code of a transmission destination from the control information detected by the control information detection unit
An identification code changing unit (205) for changing the identification code to an identification code suitable for the transmission device on the terminal side when the identification code indicates a transmission device on the terminal side;
A control command insertion separation for separating the downlink data and inserting a control command including the identification code changed by the identification code changing unit into the separated control TS of the downlink data and outputting the control command to the terminal-side transmission device Department (203)
And characterized in that:

According to this, the control information of the downlink data received by the transmission line side receiving section 201 is detected by the control information detecting section (202). The identification code included in the control information is determined by the control device identification unit (204), and the transmission destination of the control information is identified. Here, when the transmission destination of the control information is the transmission device on the terminal side, the identification code changing unit (205) changes the identification code to an identification code in a data format suitable for the transmission destination. The control command insertion / separation unit 203 separates the downlink data, inserts the changed identification code into the separated downlink data, and transmits it to the corresponding destination.

The second data transfer means includes, for example, a control information detection multiplexing section (210) for multiplexing uplink data from the transmission device on the terminal side and detecting control information from the uplink data, A control information insertion unit (209) for inserting the control information into a slot, a transmission line side transmission unit (208) for transmitting data including a control time slot in which the control information is inserted to the transmission line side as uplink data, It is characterized by having. According to this, uplink data from each transmission device connected to the terminal side is multiplexed by the control information detection multiplexing section (210) to detect control information. This control information is stored in the control information insertion unit 20.
9 is inserted into the control time slot. This data is transmitted from the transmission line side transmission unit 208 to the transmission line side as uplink data.

The present invention also provides a remote control system for a network including a plurality of transmission devices connected to each other via a transmission path and a transmission device connected to a terminal of the transmission device. An operation unit (207) for setting control information, a control information insertion unit (209) for inserting control information into a control time slot, and a control time slot in which the control information is inserted. A transmission path side transmission unit (208) for transmitting data including the data as uplink data to the transmission path side; and a control unit (206) for executing a control command and providing the control information set by the operation unit to the control information insertion unit. A transmission path side receiving section (201) for receiving downlink data from the transmission path side; and a control information detection section for detecting control information of a control time slot from the downlink data. (202), a control device identification unit (204) for determining a destination identification code from the control information detected by the control information detection unit, and a case where the identification code indicates a terminal-side transmission device. An identification code changing unit (205) for changing the identification code into an identification code suitable for the transmission device on the terminal side; and a control command for separating the downlink data and including the identification code changed by the identification code changing unit. And a control command insertion / separation unit (203) that inserts the control data into the control TS of the separated downlink data and outputs the control data to the transmission device on the terminal side, and multiplexes uplink data from the transmission device on the terminal side to change the control status. A control information detection multiplexing unit (210) to be passed to the control information insertion unit.

Also, an identification code is determined by a control device identification unit from the control information detected by the control information detection unit,
A means is provided for changing the identification code based on the result of the determination and inserting the code into a control time slot to transfer the code to another transmission device. Further, the apparatus further comprises means for detecting a control status from a control time slot from the transmission device on the terminal side, and inserting the control status into the control time slot to the transmission line.

That is, according to the present invention, in order to solve the above-mentioned problem, a transmission device which has received a command from another transmission device identifies a code designating the device and designates the device to be executed by the command. The transmission is performed after changing the content of the code for transmission, thereby enabling control of a device connected to the terminal side of the transmission device that has received the command.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A remote control system for a network according to an embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the data transmitted by each transmission device toward the transmission path is referred to as “uplink data”.
, And data transmitted to the terminal side is referred to as “downlink data”.

FIG. 1 shows a connection example of transmission devices in a network to which a remote control system according to the present invention is applied. In this example, a transmission device 1 functioning as a remote control device of a network and a transmission device 2 on a controlled side are connected to each other via a transmission line 4 and provided on a terminal side of the transmission device 2. The transmission device 3 is connected to each of the ports. That is, in the network according to this example, the transmission device 3 is cascaded (subordinate) to the transmission device 2 connected to the transmission device 1 that functions as the control device.
, And does not face the transmission device 1. In this embodiment, data is multiplexed and transmitted and received between the transmission device 1 and the transmission device 2 connected via the transmission path 4.

FIG. 2 shows a detailed configuration of each transmission device shown in FIG. 1 as a component of the remote control system of the present invention. In the figure, reference numeral 201 denotes a transmission line side receiving unit that receives multiplexed downlink data 2A from another transmission device functioning as a remote control device via the transmission line 4;
Reference numeral 02 denotes a control information detection unit that detects control information from the downlink data 2A received by the transmission line side reception unit 201, and reference numeral 20 denotes a control information detection unit.
Reference numeral 4 denotes a control device identification unit that determines the identification code of the transmission destination from the detected control information. Reference numeral 205 denotes an identification code change unit that changes the determined identification code to an identification code (code format) suitable for the terminal. And 203, a control command insertion separation unit that separates the received downlink data 2A and inserts a new control command including the changed identification code into the received downlink data 2A.

The transmission line side receiving section 201, control information detecting section 202, control command inserting / separating section 203, control apparatus identifying section 204, and identification code changing section 205 are transmitted from another transmitting apparatus functioning as a remote control apparatus. Identify the destination of the control information contained in the data (downlink data),
When the transmission destination is a terminal-side transmission device, a first data transfer means for changing the data to a data format compatible with the terminal-side transmission device and transferring the data is configured.

Reference numeral 207 denotes an operation unit for setting control information, and reference numeral 206 denotes a control unit for executing a control command and providing the control information set by the operation unit 207 to the control information insertion unit 209. is there. Further, reference numeral 210 denotes a control information detection multiplexing unit for multiplexing uplink data from the transmission device on the terminal side and detecting control information (control status) from the data. Reference numeral 209 inserts control information into a control time slot. Reference numeral 208 denotes a transmission line side transmission unit for transmitting uplink data including a control time slot in which the control information is inserted to the transmission line 4, and includes a control information detection multiplexing unit 210, a control information insertion unit The unit 209 and the transmission line side transmission unit 208 constitute a second data transfer unit that transmits uplink data from the terminal side to the transmission line side.

Furthermore, the backboard 2 of each transmission device
11, ports 212-1 to 212-n (n: natural number) are provided.
The transmission devices 3-1 to 3-n on the terminal side (transmission devices corresponding to the transmission device 3 shown in FIG. 1) can be connected to 2-n in a subordinate manner.

In the example shown in FIG. 1, the transmission apparatus 1 and the transmission apparatus 2 are connected to each other via the transmission path 4 by the transmission path receiving section 201 and the transmission path transmitting section 208 shown in FIG. . Further, the transmission device 2 and the transmission device 3 are connected to each port of the transmission device 2 shown in FIG.
The transmission path side receiving section 201 and the transmission path side transmitting section 208 shown in FIG. That is, the transmission device 1 and the transmission device 2 are connected to face each other, the transmission device 3 is connected so as to be subordinate to the transmission device 2, and the transmission device 1, the transmission device 2, and the transmission device 3 are connected in cascade. It has become something. As described above, the remote control system according to the present invention includes the elements provided inside each transmission device shown in FIG.

Next, the operation of the remote control system according to this embodiment will be described with reference to FIGS. 1 and 2 by taking as an example a case where the transmission apparatus 1 is remotely controlled from the transmission apparatus 1 shown in FIG. . In the transmission device 1 functioning as a remote control device, data for remote control set by the operation unit 207 is sent to the control unit 206. The control unit 206 creates a remote control command (control command) based on the set remote control data,
Hand over to 9. The control information insertion unit 209 stores the control unit 206 in a preset control time slot (TS).
Insert the control command created in. The data into which the control command is inserted is transmitted to the transmission path side transmission unit 20.
8 and transmitted to the transmission path 4 as uplink data 2B.

The upstream data 2B into which the control information is inserted is:
The data is transmitted from the transmission device 1 to the transmission device 2 that is opposed via the transmission path 4. The uplink data 2B is received as downlink data 2A by the transmission path side receiving unit 201 of the transmission device 2. The control information included in the control time slot (TS) of the downlink data 2A is detected by the control information detection unit 202, and the identification code specified by the device included in the control information is identified by the control device identification unit 204.

Here, the identification code identified by the control device identification section 204 corresponds to the device (transmission device 1 in this example) that has transmitted the control information (remote control command) (transmission device 2 in this example). ), The control information (remote control command) is sent to the control unit 206. The control unit 206 analyzes a command included in the control information input from the operation unit 207 or the control information identification unit 204, and performs the processing. For example, if the content of the command set from the operation unit 207 is to notify the alarm information, the alarm information is assembled into a predetermined format, passed to the control information insertion unit 209 as status information, and incorporated into the uplink data. When the control information is status, the control device identification unit 204 stores the content in the control unit 206.
Send to The control unit 206 analyzes the status information,
Provide to the user in the form of voice or text information.

Also, the identification code identified by the control device identification unit 204 is, for example, a device (the transmission device 3-1 in this example) connected to the port 212-1 of the receiving device (the transmission device 2 in this example). In this case, the remote control command is passed from the control device identification unit 204 to the identification code change unit 205. The identification code changing unit 205 changes the identification code included in the control command into a code indicating that the command is a command to the device (the transmission device 3-1 in this example) that receives the remote control command next. The control command insertion / separation unit 203 separates the multiplexed downlink data 2A, and transmits a remote control command including the identification code changed by the identification code change unit 205 to the terminal side identified by the control device identification unit 204. Is inserted into the control time slot for downlink data addressed to the transmission device 212-1.

Here, a method of changing the remote control command by the identification code changing unit 205 will be specifically described with reference to FIG. FIG. 3 shows an example of a data structure of control information according to the present embodiment. In the figure, the upper part shows the data structure of the remote control command, and the lower part shows the data structure of the remote control status. As shown in this figure,
The control information according to this embodiment is the same as the control information according to the prior art shown in FIG. 4 described above, and further includes a code area D3, and the codes defined in the code areas D3 and D4 are identification codes of transmission destinations. Represents

Here, the code area D3 is used to define an identification code of the transmission device on the terminal side that receives the command, and for example, codes “A” to “E” predetermined as follows: Is described. Code “A”: represents a device (that is, own device) opposite to a device that sends a command. Code “B”: represents a device connected to port 212-1 of the device facing the device sending the command. Code “C”: represents a device connected to port 212-2 of the device facing the device sending the command. Code "D": represents a device connected to port 212-3 of the device facing the device sending the command. Code “E”: represents a device connected to the port 212-4 of the device facing the device sending the command. In this example, the ports 212-1 to 212-4 are defined, but the present invention is not limited to this, and the ports may be defined as many as necessary (for example, the number of transmission devices connected to the terminal side). I just need.

First, a method of changing an identification code in a case where a remote control command is transmitted from the transmission apparatus 1 to the transmission apparatus 2 and the transmission apparatus 2 is to be controlled will be described. From the viewpoint of the transmission device 1, the transmission device 2 corresponds to a device opposite to the device that transmits the command (in this example, the transmission device 1). Therefore, “A” is defined in the code area D3, and , A code corresponding to the type of the transmission device 2 is defined.

The transmission apparatus 2 accepts this remote control command only when the code defined in the code area D3 is "A" and the type defined in the code area D4 matches the type of the own apparatus. Then, processing corresponding to this command is executed. In this case, "A" is defined in the code area D3, and a code indicating a type that matches the type of the own apparatus is defined in the code area D4.
Upon receiving the remote control command from the transmission device 1, the transmission device 2 executes a process according to the remote control command. In this case, since a code indicating a device opposite to the device that sends the command is defined in the code area D3, data is not transferred to the transmission device 3 on the terminal side of the transmission device 2.

Next, a method of changing an identification code in a case where a remote control command is transmitted from the transmission device 1 to the transmission device 3-1 and the transmission device 3-1 is to be controlled will be described.
From the viewpoint of the transmission device 1, the transmission device 3-1 is a device connected to the port 212-1 of the device (the transmission device 2 in this example) opposed to the device that transmits the command (the transmission device 1 in this example). Therefore, "B" is defined in the code area D3, and a code corresponding to the type of the transmission device 3-1 is defined in the code area 4.

When the transmission device 2 receives this remote control command from the transmission device 1, the code defined in the code area D3 is "B". Is to be sent to the transmission device 3-1 connected to. In this case, the identification code changing unit 205 sets the code area D3
To send a command (in this case, transmission device 2)
Is defined as a code "A" representing a device (in this case, the transmission device 3-1) that is opposed to the transmission device 3-1. Then, the control command insertion / separation unit 203 sends the control command including the changed identification code to the port 212-.
1 is inserted into the downlink data output from 1 and is output to the transmission device 3-1 of the transmission destination.

The transmission device 3-1 transmits the remote control command only when the code defined in the code area D3 is "A" and the type defined in the code area D4 matches the type of its own device. And executes a process corresponding to the command. In this case, since “A” is defined in the code area D3 and a code indicating a type that matches the type of the own apparatus is defined in the code area D4, the transmission apparatus 3-1 receives this, Transmission device 2
Executes the processing according to the remote control command from. That is, the remote control command output from the transmission device 1 is
The signal is received by the transmission device 3-1 connected in cascade to the transmission device 2, and the transmission device 3-1 is controlled.

In this example, the transmission device 3-1 is controlled, but a transmission device further connected to the terminal side of the transmission device 3-1 may be controlled. in this case,
The transmission device 3-1 transmits the data received by the control command insertion / separation unit 203 to the terminal as terminal-side transmission data 2C, and transmits the data 2 received from the terminal-side transmission device.
D is passed to the control information detection multiplexing section 210. This transmission device 3
The -1 control information detection and multiplexing unit 210 multiplexes the upstream main signal data from the terminal-side transmission device, and detects a remote control status in the control time slot (TS) of the terminal-side transmission device. The content is passed to the control information insertion unit 209. This data is output as uplink data to the transmission device 1 of the remote control device.

As described above, in summary of the method of changing the identification code according to the present embodiment, each transmission device is configured such that the code area D3 of the received control information is "A" and the code area D4
When the code described in (1) matches the type of the own device, processing corresponding to the received command is executed. Also,
When the code area D3 indicates the transmission device on the terminal side, the command is not executed, the identification code (the code in the code area D3) is rewritten to an identification code suitable for the transmission device on the terminal side, and the code is transmitted to the terminal side. Forward.

According to the present invention, as described above, each transmission device analyzes control information and, when the control target is a transmission device connected to the terminal, changes the identification code and transfers the data. In other words, the code of the code area D3 (the code indicating the terminal-side transmission device that receives the control command)
Is added as control information, thereby leaving the code format exchanged between the transmission apparatus 1 and the transmission apparatus 2 and constructing control information for controlling the transmission apparatus on the terminal side. Therefore, it is possible to control the transmission device connected to the terminal without largely changing the conventional communication protocol.

In the above-described embodiment, the control time slot (T
One S) is set for each transmission device on the terminal side to be connected, but one control time slot (TS) between the transmission device 1 and the transmission device 2 is sufficient. This is because one time slot (TS) set between the transmission device 1 and the transmission device 2 is used regardless of which of the transmission devices 1 and 2 performs remote control. Because it is only.

Further, in the above embodiment, each transmission apparatus is configured to include the components shown in FIG. 2. For example, in a system that does not require uplink data,
For example, it may be configured to include only means for transferring downlink data to the terminal side (first data transfer means), and if necessary, means for transferring uplink data to the transmission path side (second means). May be omitted.

[0041]

As described above, according to the present invention, a transmission destination of control information included in data transmitted from a transmission device functioning as a remote control device is identified, and the transmission destination is transmitted by a terminal. If the device, the data is changed to a data format compatible with the transmission device on the terminal side and transferred,
Since data is input from the transmission device on the terminal side and transmitted to the transmission line side, remote control is possible for the transmission devices connected in cascade (subordinate) to the transmission device. Therefore, by adding and connecting transmission devices to which the present invention is applied, the multiplicity of terminals can be increased, and all the transmission devices can be efficiently remotely controlled.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a connection example (a network configuration example) of a transmission device according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a configuration of a transmission device according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a data structure of control information according to the embodiment of the present invention;

FIG. 4 is a diagram illustrating a data structure of control information according to the related art.

[Explanation of symbols]

 1: Transmission apparatus (transmission path side) 2: Transmission apparatus 3, 3-1 to 3-n: Transmission apparatus (terminal side) 4: Transmission path 201: Transmission path side reception unit 202: Control information detection unit 203: Control command insertion / separation Unit 204: control device identification unit 205: identification code change unit 206: control unit 207: operation unit 208: transmission path side transmission unit 209: control information insertion unit 210: control information detection multiplex unit 211: backboard 212-1 to 212- n: Port D1 to D7: Code area

Claims (6)

[Claims] 1. A network remote control system comprising: a plurality of transmission devices connected to each other via a transmission path; and a transmission device connected to a terminal of the transmission device. Identify the transmission destination of the control information included in the data transmitted from the transmission device functioning as the remote control device, and when the transmission destination is the transmission device on the terminal side, adapt the data to the transmission device on the terminal side First to change to data format and transfer
And a second data transfer unit for inputting data from the transmission device on the terminal side and transferring the data to the transmission line side. 2. The first data transfer means includes: a transmission path side receiving section (201) for receiving downlink data from the transmission path side; and control information detection for detecting control information of a control time slot from the downlink data. (202), and a control device identification unit (204) that determines an identification code of a transmission destination from the control information detected by the control information detection unit.
An identification code changing unit (205) for changing the identification code to an identification code suitable for the transmission device on the terminal side when the identification code indicates a transmission device on the terminal side; A control command insertion / separation unit (203) for inserting a control command including the identification code changed by the identification code changing unit into the separated control TS of the downlink data and outputting the control command to the transmission device on the terminal side;
The remote control system for a network according to claim 1, further comprising: 3. The control data detection multiplexing unit (210) for multiplexing uplink data from the transmission device on the terminal side and detecting control information from the uplink data, the second data transfer means, A control information insertion unit (209) for inserting the control information into a slot; a transmission path side transmission unit (208) for transmitting data including a control time slot in which the control information is inserted to the transmission path as uplink data; The remote control system for a network according to claim 1, further comprising: 4. A remote control system for a network, comprising: a plurality of transmission devices connected to each other via a transmission line; and a transmission device connected to a terminal of the transmission device. An operation unit (207) for setting control information, a control information insertion unit (209) for inserting control information into a control time slot, and uploading data including the control time slot into which the control information is inserted. A transmission path side transmission section (208) for transmitting data to the transmission path side; a control section (206) for executing a control command and providing the control information set by the operation section to the control information insertion section; A transmission path side receiving unit (201) for receiving downlink data from a roadside; and a control information detection unit (202) for detecting control information of a control time slot from the downlink data. A control device identification unit (204) for determining an identification code of a transmission destination from the control information detected by the control information detection unit
An identification code changing unit (205) for changing the identification code to an identification code suitable for the transmission device on the terminal side when the identification code indicates a transmission device on the terminal side; A control command insertion / separation unit (203) for inserting a control command including the identification code changed by the identification code changing unit into the separated control TS of the downlink data and outputting the control command to the transmission device on the terminal side;
And a control information detection multiplexing unit (210) for multiplexing uplink data from a terminal side transmission device and passing a control status to the control information insertion unit (210). 5. A control device identification unit discriminates an identification code from control information detected by the control information detection unit, changes the identification code based on the result of the determination, and inserts the identification code into a control time slot to thereby perform another control time slot. 5. The network remote control system according to claim 4, further comprising means for transferring the data to a transmission device. 6. A control means for detecting a control status from a control time slot from the transmission device on the terminal side, and inserting the control status into the control time slot to the transmission line. Item 5. A remote control system for a network according to Item 4.