JPH08102753A - Method and device for automatically switching transmission line - Google Patents

Abstract

PURPOSE: To perform the batch centralized control of data faults and to recover the fault of a LAN system in an early stage by detecting the fault, analyzing contents and performing automatic changeover corresponding to fault contents. CONSTITUTION: A host system and a terminal equipment are connected to a transmission line through an automatic switching device. At the time of transmitting and receiving the data, the LAN data information of the transmission line is monitored in a monitoring part 32 through a changeover part 31, and when a fault detection part 19 detects the fault of the data, a control part 37 performs comparison with changeover conditions down-loaded to a changeover judgement part 34. As a compared result, when it is judged that the changeover is required, changeover instruction information is transmitted to the changeover part 31, the changeover of the transmission line is executed and then, changeover execution information is transmitted through a public line 25 to a remote monitoring device. Thus, the fault is detected in the early stage, the transmission line is switched at a high speed and the batch centralized control of the data faults of the transmission line is performed.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an L having a plurality of transmission lines.
The present invention relates to a transmission line automatic switching method and device in an AN system.

[0002]

2. Description of the Related Art Conventionally, there is a LAN system of this type in which a host system and a terminal are connected by a plurality of transmission lines. In such a LAN system, when a failure occurs in one of the terminals, the previously used transmission path is manually switched to another transmission path in the failed terminal regardless of the content of the failure. In the following, it is usual that the transmission paths are sequentially switched between adjacent terminals.

Therefore, in the conventional LAN system,
Automatically switch the transmission path by detecting the failure content on the transmission path and automatically transmitting the failure content to the remote monitoring device, and analyzing whether the failure is instructed to switch the transmission path. Nothing has been pointed out about determining whether or not.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to centrally manage data failures in a transmission path of a LAN system including a host system and a terminal device, and automatically switch the transmission path according to a failure content level. It is an object of the present invention to provide an automatic switching method and apparatus capable of switching a transmitter by selecting an instruction.

[0005]

According to the present invention, a LAN
A host system and a terminal device that are respectively connected to a plurality of transmission lines that configure the system via automatic switching devices;
A remote monitoring device connected to the automatic switching device via a public line network, the failure content on the transmission path is detected by the automatic switching device, and the failure content is transmitted to the remote monitoring device. An analysis method is provided, and when this corresponds to the failure content for instructing the switching of the transmission path, the automatic switching method of the transmission path characterized by switching the transmission path is obtained.

Further, according to the present invention, a host system and a terminal device which are respectively connected to a plurality of transmission lines constituting a LAN system through an automatic switching device, and the automatic switching device are connected through a public line network. A remote monitoring device, the automatic switching device detects a failure content on the transmission path, transmits the failure content to the remote monitoring device, analyzes the failure content, and instructs the switching of the transmission path. In the case of (1), there is obtained a transmission line automatic switching device characterized by switching the transmission line.

Further, according to the present invention, the automatic switcher has a switching unit for switching a transmission line, a monitor unit for monitoring LAN data on the transmission line, a fault detection unit for detecting a fault from the monitored data, and a fault detection content. And a switching determination unit that determines whether or not a failure has been instructed to switch, a switching instruction unit that instructs the switching unit to switch, a remote monitoring device transceiver that sends and receives data to and from a remote monitoring device, and automatic switching An automatic switching device for a transmission line is provided, which is provided with a control unit for controlling each of the above-mentioned parts of the device and is capable of early detecting a failure of the LAN system and constructing a highly reliable LAN system.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an automatic switching device to which the transmission line automatic switching method of the present invention is applied, and FIG. 2 is a block diagram showing the configuration of the automatic switching device of FIG.

The host system 11 and the terminal device 12 form the LAN system via the first and second automatic switching devices 13 and 14, respectively.
5 and 16 are connected. Between the host system 11 and the first automatic switching device 13, between the terminal device 12 and the second automatic switching device 14, between the first automatic switching device 13 and the first transmission line 15, the first automatic switching device 13 and Between the second transmission lines 16, the second automatic switching device 14 and the first transmission line 15
LAN data lines 17, 18, 19, 20 between the second automatic switch 14 and the second transmission line 16, respectively.
It is connected by 21 and 22. The first and second automatic switches 13, 14 are also connected to a remote monitoring device 24 via a public line network (switch) 23, respectively.
The first and second automatic switches 13, 14 and the public line network 23, and the public line network 23 and the remote monitoring device 24 are connected by public line data lines 25, 26, 27, respectively.

The first and second automatic switching devices 13 and 14 have the same structure, and their concrete structure is shown in FIG.
Is shown in. That is, these automatic switching devices are
And a switching unit 3 for switching the second transmission lines 15 and 16
A monitor unit 32 that monitors LAN data of the first, first or second transmission lines 15 and 16, a fault detection unit 33 that detects a fault from the monitored data, analyzes the fault detection content, and determines whether or not a fault has been instructed to switch. Switching determination unit 3 for determination
4. Switching instruction unit 3 for instructing switching unit 31 to perform switching
5. A remote monitoring device transmitting / receiving unit 36 for transmitting / receiving data to / from the remote monitoring device 24 at a remote place, and a control unit 37 for controlling the above-mentioned respective units of the automatic switching device. The switching unit 31 has LAN data lines 19 (21) and 20 (22) connected to the first and second transmission lines 15 and 16.
Is connected, and LA is connected between the switching unit 31 and the monitor unit 32.
N data lines 38 connect to each other. Further, the control unit 37 includes a remote monitoring device transmission / reception unit 36 and a switching determination unit 3
4. Control data lines 38, 39, 40 and 41 are connected to the switching instruction section 35 and the failure detection section 33, respectively. Further, the monitor unit 32 and the failure detection unit 33 are connected to each other, and the switching unit 31 and the switching instruction unit 35 are connected to each other by control data lines 42 and 43, respectively.

Next, the automatic switching method of the transmission line according to the present invention by the automatic switching device configured as described above will be described. Table 1
Is the switching condition information, which is a condition for determining whether or not to issue an instruction to switch the transmission line when the first and second automatic switches 13, 14 detect a failure in the first or second transmission line 15, 16. It is a list showing an example, and is stored in a storage device (not shown) in the remote monitoring device 24.

[0012]

[Table 1]

This switching condition information is stored in the host system 11
Also, before the data transmission / reception operation by the terminal device 12 is started, the data is downloaded from the remote monitoring device 24 to the automatic switching devices 13 and 14 via the public line network 23. That is, this download is from the remote monitoring device 24 to the public network 2.
Via the first and second automatic switching devices 13 and 14
It is received by the remote monitoring device transmitting / receiving unit 36. afterwards,
Control data lines 38, 39 under the control of the control unit 37.
After that, it is stored in the switching determination unit 34. After the switching condition information is downloaded in this way, a data transmission / reception operation between the host system 11 and the terminal device 12 is performed.

Now, the host system 11 and the terminal device 1
It is assumed that a data transmission / reception operation is performed between the two using the first transmission line 15. To detect a fault in the automatic switching devices 13 and 14, the LAN data information of the transmission line 15 is always received by the monitor unit 32 via the switching unit 31, and the fault information such as communication interruption and parity error contained in the LAN data information is detected. The detection is performed by the failure detection unit 19. The detected failure information is sent to the switching determination section 34 under the control and control of the control section 37 and compared with the switching condition information downloaded to the switching determination section 34. As a result, when it is determined that the transmission path switching needs to be executed, the switching instruction information is sent from the switching instruction unit 35 to the switching unit 31, and the transmission path 15 is switched to the transmission path 16. . After the transmission line switching is executed, transmission line switching execution completion information is transmitted to the remote monitoring device 24 via the public line network 23.

Instead of executing the transmission path switching determination within the first and second automatic switching devices 13 and 14, the remote monitoring device 24 may perform the determination in a centralized manner. That is, when a failure is detected by the first or second automatic switching device 13 or 14, this failure information is sent to the remote monitoring device 24 via the public line network 23, where the switching conditions in Table 1 are set. Compared with information. As a result, when it is determined that it is necessary to switch the transmission path, the forced switching instruction information is transmitted via the public line network 23. This forced switching instruction information is received by the remote monitoring device transmitting / receiving section 36 in the first and second automatic switching devices 13, 14 via the public line data lines 25, 26. The received forced switching instruction information is sent to the switching instruction section 35 and the switching section 31 under the control and control of the control section 37, and the switching from the transmission line 15 to the transmission line 16 is executed.

[0016]

As described above, according to the present invention, it becomes possible to perform a centralized management of the data failure of the transmission path of the LAN system at the same time, detect the failure of the LAN system at an early stage, and switch the transmission path at high speed. A reliable LAN system can be constructed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an automatic switching device to which a transmission line automatic switching method of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of the automatic switching device of FIG.

[Explanation of symbols]

 11 Host System 12 Terminal Device 13 First Automatic Switching Device 14 Second Automatic Switching Device 15 First Transmission Line 16 Second Transmission Line 17-22 LAN Data Line 23 Public Network 24 Remote Monitoring Device 25-27 Public Line data line 31 Switching unit 32 Monitor unit 33 Failure detection unit 34 Switching determination unit 35 Switching instruction unit 36 Remote monitoring device transmitting / receiving unit 37 Control unit 38 to 43 Control data line

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Claims (3)

[Claims] 1. A host system and a terminal device, each of which is connected to a plurality of transmission lines constituting a LAN system via an automatic switching device, and a remote monitoring device connected to the automatic switching device via a public line network. And detecting the failure content on the transmission path by the automatic switching device, transmitting the failure content to a remote monitoring device, and analyzing the failure content,
An automatic transmission path switching method, characterized in that when this corresponds to a failure content that instructs switching of the transmission path, the transmission path is switched. 2. A host system and a terminal device, each of which is connected to a plurality of transmission lines constituting a LAN system via an automatic switching device, and a remote monitoring device connected to the automatic switching device via a public line network. The automatic switching device detects the failure content on the transmission path, transmits the failure content to a remote monitoring device, analyzes the failure content, and when this corresponds to the failure content instructing the switching of the transmission path. Is an automatic transmission line switching device characterized by switching transmission lines. 3. The automatic switching device, a switching unit for switching a transmission line, a monitor unit for monitoring LAN data of the transmission line, a fault detection unit for detecting a fault from the monitored data, and analyzing the fault detection content. A switching determination unit for determining whether or not a failure has been instructed to be switched, a switching instruction unit for instructing the switching unit to perform switching, a remote monitoring device transmitting / receiving unit for transmitting / receiving data to / from a monitoring device at a remote location, and the automatic switching device. The automatic switching device of the transmission path according to claim 2, further comprising a control unit that controls each unit.