JP2003304275A - Transmission line backup system of transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use a radio communication line by a mobile communication device, etc., for backup of a transmission line to be duplexed. <P>SOLUTION: A main transmission line 13 for transferring data between transmitters 10a and 10b connects an interval between logical circuits 14a, 14b of the transmitters 10a, 10b via modems 15a, 15b. Mobile communication devices 11a, 11b such as a cellular telephone and a PHS (personal handyphone system) are installed in the transmitters 10a, 10b for the purpose of using the radio communication line 12 to be a sub-transmission line for backup in the transmitters 10a, 10b. Data communication is performed on the side of the main transmission line 13 and the radio communication line 12 for backup is stopped at a normal time by using the radio communication line 12. Then, data communication is temporarily performed by using the mobile communication devices 11a, 11b in the case of an abnormality or stop of the transmission line 13. The radio communication line 12 is switched to the main transmission line 13 when the main transmission line 13 becomes normal. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line backup system for a transmission device, which applies mobile communication (cell phone, PHS, etc.) to the transmission line backup of the transmission device.

[0002]

2. Description of the Related Art In a transmission device that requires high reliability,
Even if the transmission lines between the devices are different, the transmission lines are duplicated so that the data backup system is operated so as not to hinder the operation of the data backup system in the transmission device.

A transmission device without a backup system which has been conventionally used uses a non-duplexed transmission line shown in FIG. 2. In FIG. 2, reference numerals 10a and 10b denote transmission devices (primary stations) and (secondary stations). Next station), this transmission device 1
0a and 10b are the logic circuits 14a and 14b and the modem 15
a, 15b, and both transmission devices 10a, 10b
Are connected by a transmission line 13. In addition, transmission line 1
3 is connected to the modems 15a and 15b.

The above transmission device is an example of a non-duplex transmission line. Next, FIGS. 3 and 4 show a transmission device having a backup system in which the transmission line is duplicated. First,
Referring to FIG. In FIG. 3, the transmission device 10a,
Line switchers 31a and 31b are newly provided in 10b, and the line switchers 31a and 31b are connected to the main transmission line 13a and the backup transmission line 13b having the same performance.

The line switching devices 31a and 31b are connected to both transmission lines 1
It has a function of monitoring 3a and 13b and automatically switching to a normal transmission path 13a or 13b when an abnormality is detected.

Next, a transmission device using a duplicated transmission line will be described with reference to FIG. FIG. 4 shows two sets of modems 15a,
This is a transmission method using 15aa, 15b, and 15bb, and in this case as well, like the above-mentioned FIG. 3, the line switching devices 31a and 31b switch to the normal transmission path 13a or 13b.

In order to operate the duplicated transmission line,
Since it must be used when there is an abnormality due to the transmission line on the other side (such as disconnection), it is generally applied to an independent configuration (separate equipment and wiring route).

[0008]

As described above, in order to operate a transmission device in which the transmission line is duplicated, it is necessary to prepare two independent transmission lines which have the same performance as the duplicated transmission line. Therefore, there is a problem that the cost of equipment is more than doubled as compared with the case where the transmission line is not duplicated.

Further, basically, the transmission line used for the transmission device is required to have sufficiently high reliability, and it is better than the case of switching to the other transmission line when abnormality occurs in one of the transmission lines (such as disconnection). However, there are many cases in which one transmission path is temporarily switched to the other transmission path due to maintenance of the transmission path or the like, and therefore an effect commensurate with the cost of duplicating the transmission path cannot be expected.

The present invention has been made on the basis of the above-mentioned problems, and is a transmission in which a wireless communication line such as a mobile communication device (a mobile phone, a PHS, etc.) is used for backup of a duplicated transmission line. An object is to provide a transmission line backup system for a device.

[0011]

In order to solve the above-mentioned problems, the present invention provides a system in which data is transmitted and received between transmission devices via a main / sub-transmission line. Is configured by a wired line, the other sub transmission line is configured by a wireless communication line, the transmission device is provided with a logic circuit for performing data processing, and a modem is provided between one main transmission line and the logic circuit. A mobile communication device is installed between the wireless communication line and the logic circuit, which is the other sub-transmission line. Normally, the main transmission line is used for data transfer, and when the main transmission line is abnormal or stopped, it moves. It is characterized in that a body communication device is used to exchange data via a sub transmission line.

A second aspect of the invention is characterized in that the mobile communication device stops the supply of the fixed period information or extends the fixed period timer in the backup mode.

A third aspect of the invention is characterized in that the mobile communication device performs data communication in the backup mode at an arbitrary cycle.

A fourth aspect of the invention is characterized in that the mobile communication device controls ON / OFF of a power source of the mobile communication device by a transmission device.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG.
a and 14b are transmission devices (primary station and secondary station) 10a,
10b of the logic circuit, and these logic circuits 14a, 14b
Is a data processing circuit for processing after transmitting / receiving data between the transmission device (primary station) 10a and the transmission device (secondary station) 10b. Reference numeral 13 is a main transmission line (main line) for exchanging data between the transmission devices (primary station and secondary station) 10a and 10b. This transmission line 13 is a transmission device (primary station and secondary station). Next station) Logic circuit 14 of 10a, 10b
A and 14b are connected via modems 15a and 15b.

In order to use the wireless communication line 12 as a backup sub-transmission path for the transmission devices 10a and 10b, the transmission devices (primary station and secondary station) 10a and 10b are used.
b, mobile communication devices 11a, 1 such as mobile phones and PHSs.
Install 1b.

By using the wireless communication line 12 serving as the auxiliary transmission line for backup, data communication is performed on the main transmission line 13 side in normal times, and the mobile communication devices 11a, 11 are connected.
The wireless communication line 12 for backup by b is stopped (normal mode).

When the main transmission line 13 is abnormal or stopped, the mobile communication devices 11a and 11b are used to temporarily perform data communication (backup mode), and when the main transmission line 13 becomes normal, Switch to the normal mode.

(Second Embodiment) In the first embodiment, when the transmission line 13 is abnormal or stopped, the mobile communication device 1
During the backup mode using 1a and 16b, the communication data amount is reduced by stopping the fixed cycle information or extending the fixed cycle timer (in order to reduce the throughput and maintain stable wireless communication).

(Third Embodiment) In the first embodiment, when performing maintenance on the mobile communication devices 11a and 11b, data communication is performed in a backup mode at an arbitrary cycle and the mobile communication devices 11a and 11b are performed. Check if the operation of is normal. In addition, the mobile communication devices 11a, 1
1b enables voice communication and can be used as a connecting means between the transmission devices 10a and 10b.

(Fourth Embodiment) In the first embodiment, as a method of supplying power to the mobile communication devices 11a and 11b, a battery is not used for the power supply of the mobile communication devices 11a and 11b. Is connected to a power adapter (not shown) and mobile communication devices 11a and 11b, and the transmission device 10
The power supply to the mobile communication devices 11a and 11b can be turned on and off from inside a and 10b.

[0023]

As described above, according to the present invention, the sub-transmission line in the transmission line backup system of the transmission device is the conventional one by using the wireless communication line of the mobile communication device (cell phone, PHS, etc.). It is possible to simplify the device compared to the method of duplicating the transmission line, and it is possible to realize an inexpensive backup system which is functionally equivalent to the backup system. In addition, the basic usage fee of the mobile communication device is much cheaper than preparing the transmission line by yourself or renting a fixed type transmission line, and data communication is always performed with the mobile communication device. Since it is not done, communication charges (call charges) can be kept low.

According to the present invention, by reducing the amount of communication data when the mobile communication device is used, stable communication can be performed even in the mobile communication device, and the communication charge (call charge) is packet charged. By doing so, the communication charge can be kept low.

Further, when performing maintenance on the mobile communication device, it is possible to confirm whether the mobile communication device and the wireless communication environment are normal by performing data communication in the backup mode at an arbitrary cycle. By improving reliability as a backup system of a transmission device using a communication device and enabling voice communication of the mobile communication device, the efficiency of maintenance of the mobile communication device can be improved.

Further, as a method of supplying power to the mobile communication device, a battery is not used for the power supply of the mobile communication device to facilitate maintenance, and the power supply of the mobile communication device is controlled. Power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a transmission device using a conventional non-duplex transmission line.

FIG. 3 is a schematic configuration diagram of a transmission device using a conventional duplex transmission line.

FIG. 4 is a schematic configuration diagram of a transmission device using a conventional duplex transmission line.

[Explanation of symbols]

10a, 10b ... Transmission device 11a, 11b ... Mobile communication device 12 ... Wireless communication line 13 ... Main transmission line 14a, 14b ... Logic circuit 15a, 15b ... Modem

Claims (4)

[Claims] 1. A system in which data is transmitted and received between transmission devices via a main / sub transmission line, one main transmission line is configured by a wire line, and the other sub transmission line is configured by a wireless communication line, The transmission device is provided with a logic circuit for processing data,
A modem is installed between one main transmission line and the logic circuit, and a mobile communication device is installed between the wireless communication line and the logic circuit, which is the other sub-transmission line. A transmission line backup system for a transmission device, characterized in that when a main transmission line is abnormal or stopped, the mobile communication device is used to exchange data via the sub transmission line. 2. The transmission path of the transmission device according to claim 1, wherein the mobile communication device is configured to stop the supply of the fixed period information or extend the fixed period timer in the backup mode. Backup system. 3. The transmission path backup system for a transmission device according to claim 1, wherein the mobile communication device performs data communication in a backup mode at an arbitrary cycle. 4. The transmission line backup system for a transmission device according to claim 1, wherein the mobile communication device controls ON / OFF of power of the mobile communication device by a transmission device.