JPH0372727A - Dual switching system for crp line control - Google Patents

Abstract

PURPOSE:To eliminate the troublesome control by providing a memory means for communication which is connected to a current system control part and a stand-by system control part and stores the operation state of the current system control part. CONSTITUTION:The operation state of a current system control part 1 is momently received by a communication memory 4 and is simultaneously transmitted to a stand-by system control part 2. If trouble occurs in the current system control part 1, it is reported to a trouble monitor control part 3, and the part 3 reports the indication of switching to the stand-by system control part 2 through the communication memory 5. Since the stand-by system control part 2 momently receives operation information from the current system control part 1 through the communication memory 4, the stand by system control part 2 can recognize information before switching at this time and the operation is immediately continued from this time. Thus, the smooth switching operation is performed without complicated control.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Prior art (Figure 4) Means for solving the problems to be solved by the invention (Figure 1) Working examples (Figure 2) , Fig. 3) Effects of the invention [Summary] Regarding the duplex switching system for CR1 line control, the purpose is to enable duplex switching control with a simple configuration, and to control the active system control unit, standby system control unit, and their operations. In the duplex CR1 line control system, which is equipped with a fault monitoring control unit that monitors a second communication memory means connected to the system control unit, the standby system control unit, and the fault monitoring control unit and storing fault information of the active system control unit; the active system control unit, the standby system control unit, and the fault monitoring control unit; characterized in that when a fault in the active system control unit is detected by the signal line or communication memory means, the standby system control unit is switched as the active system according to the contents of the communication memory means. do.

[Industrial application field]

This invention is based on CRP (Convenience Ra).
The present invention relates to a line control method for a dio phone (simplified wireless telephone) system, and particularly to a redundant switching method in a redundant CRP system in preparation for the occurrence of a failure.

In recent years, the use of car phones has become widespread and users can now make calls anywhere, even while riding in a car, but car phones themselves are still too expensive for the general public to use freely. , it is desired to provide equipment that can be used at lower cost.

A car phone using a CRP system is a system proposed to meet this demand, and is capable of providing users with services equivalent to those of conventional car phones at a low cost. This involves placing an unmanned base station with a relatively simple configuration on the top of a mountain, etc., communicating between this base station and cars, and connecting calls from cars to other car phones via this base station. , or to other general subscribers through NTT's line network, but the number of channels to the base station is limited to reduce costs.

A car phone using this CRP system is characterized by being inexpensive, but out of consideration for the large number of users, base station system failure is not allowed and highly reliable operation is required.

[Conventional technology]

FIG. 4 is a diagram for explaining a conventional example.
A) shows an overview of a simple car phone system.
FIG. 4(B) shows an outline of the base station.

In FIG. 4(A), 61 is a base station, which is usually installed on a hill or mountain top with good visibility.

62 is the telephone line network of NTT, and this telephone line W46
2 can be used to access the general subscriber's telephone. 63 and 63' are subscriber terminals (telephones) mounted on a moving vehicle such as a car.

Although the base station 61 is connected to NTT's line, its normal operation is carried out by another entity, and it has a relatively small number of channels, for example, about 16 standard channels, and in order to reduce operating costs. Operated unmanned.

FIG. 4(B) shows an outline of the configuration of the base station. In the figure, 64.65 is a processing device constituted by a computer, and these two processing devices 64.6
5 constitutes a redundant processing device for active use and backup in the base station.

That is, these processing devices 64 and 65 are connected in parallel,
When one of the processing devices is controlling the base station, the other processing device is in standby mode as a backup. Each of the processing devices is provided with a monitoring control unit, and each monitors the operation of the other processing device to see if a serious failure occurs.

Reference numeral 66 denotes a synchronization device, which is used to achieve necessary synchronization between the active and backup processing devices when switching to a backup processing device when the current processing device fails.

In a system with such a redundant configuration, if the active processing unit malfunctions, the supervisory control unit detects this and the synchronization unit transfers the state of the active processing unit before the failure to the backup one. The processing device is notified, a backup processing device is activated, and this backup processing device is switched to use.

[Problem to be solved by the invention]

As mentioned above, in conventional duplex processing systems, the active and standby processing units are independent, and the monitoring and control units are also independent, so synchronization between the units during operation is essential. becomes. However, the synchronization device for this purpose is expensive, and the complexity of the processing for this purpose and the complexity of the monitoring and control processing of the active system and standby system for fault detection make it difficult to switch processing equipment in the conventional duplex processing method. This has the problem of reducing the reliability of the system.

The present invention has been made in view of these points, and is intended to simplify the circuit configuration and unify the fault monitoring control unit in CR1 line control equipped with active and standby processing units, thereby improving control efficiency. The purpose is to provide a redundant switching system that eliminates complexity.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, reference numerals 1 and 2 designate an active system control section and a standby system control section, respectively, which constitute the line control section 10.

3 is a fault monitoring control unit, and 4 and 5 are memories for communication. A communication memory 4 is provided between the active system control section 1 and the standby system control section 2.
is provided between the active system control section 1, the standby system control section 2, and the fault monitoring control section 3. Further, the active system control section 1 and the fault monitoring control section 3 are connected by signal lines 7.8, and the standby system control section 2 and the fault monitoring control section 3 are connected by signal lines 7.8, respectively.

The communication memory 4 is a communication memory between the active system and the backup system, and it receives and stores the operating status of the active system control unit 1 from time to time, and at the same time transmits the status to the backup system control unit 2. It is something. Further, the communication memory 5 is a communication memory between the active system/standby system and the fault monitoring control unit 3, and is a communication memory between the active system/standby system and the fault monitoring control unit 3, and the line control unit 10 including the active system control unit 1 and the standby system control unit 2, and the fault monitoring control unit 3. It functions as a fault occurrence notification signal and for transmitting switching information during the period. Also, signal line 7.8
is for notifying the failure monitoring control unit 3 of a hardware failure of the line control unit 10.

[Effect]

When a failure occurs in the active control unit 1, if it is a hardware failure, the failure monitoring control unit 3 is notified via the signal line 7.
Further, if the fault is detected by software, the communication memory 5 notifies the fault monitoring control unit 3. In response to this, the fault monitoring control unit 3 notifies the standby system control unit 2 of a switching instruction via the communication memory 5 as well.

At this time, the backup system control section 2 receives operation information from the active system control section 1 via the communication memory 4 from time to time, so even if the control section is switched by a switching operation, operation will resume. Even after the switching, the information before the switching can be grasped, so the operation can be continued immediately from that point.

[Example] FIG. 2 shows an example of the present invention. Since the same parts as in FIG. 1 are given the same numbers, detailed explanations of those parts will be omitted.

Both the active system and standby system control sections of the line system 111 section 10 are provided with a memory writing/continuation section 11.21,
Write and read operations to and from the communication memory 4.5 are performed. The fault monitoring control unit 3 also includes an alarm detection unit 31 that detects the occurrence of a hardware fault from the control unit 1.2, and a fault content reading unit 34 that reads the contents of the communication memory 5.
, a switching instruction writing unit 33 for writing a switching instruction to the communication memory 5, and a control unit 32 for controlling these parts.

This fault monitoring control section 3: (1) monitors the operation of the active system control section 1 and the standby system control section 2; (2) monitors abnormalities of the active system control section I and the standby system control section 2; and (2) controls the active system control section 1 and the standby system control section. (2) maintenance control of the active system control section 1 and standby system control section 2;

Further, the line control unit 10 is connected to a wireless device 9, and sends and receives signals to and from a mobile terminal such as a car via the wireless device 9.

0 Referring to FIG. 3, the switching operation when a failure occurs in the apparatus of the present invention will be explained. In FIG. 3, in order to clearly show the operation, the communication memory 4 for momentarily storing the operating state of the active system control section 1 and transmitting it to the standby system control section 2 is omitted.

When the active system control unit 1 is operating normally, the failure monitoring control unit 3 monitors the operating status of not only the active system control unit 1 but also the standby system control unit 2 so as not to interfere with switching control in the event of a failure. Also monitor. In this state, if a hardware error occurs in the active system control unit 1, the failure will be notified to the failure control unit 3 via the signal line 7, and if the failure is detected by software, this will be detected. , the communication memory 5 is notified of the failure (step).

If a failure is notified via the communication memory 5, the details of the failure are read from the communication memory 5 (step 2).

After examining the content of the fault that has been read, if it is minor, for example, one of the channels has failed, the channel can be switched to another and the faulty channel can be simply written in the communication memory to continue controlling the active system. Part 1 will continue to be used, but in the case of a serious failure, a switching instruction will be written to the communication memory 5 (step 2).

The switching instruction written in the communication memory 5 is read by the standby system control section 2, and the line control section is switched from the active system to the standby system (step 2).

As described above, in this invention, the active system control unit and the standby system control unit can directly communicate with each other via the communication memory, the standby system can detect the current operating status in real time, and The supervisory control unit independently recognizes abnormal conditions in the active system and can instruct switching to the backup system at any time. This means that the standby system is always on standby ready for switching operations, and smooth switching operations are possible without the need for complicated control as in the conventional system.

〔Effect of the invention〕

As described above, according to the present invention, the following effects can be achieved. It will be held.

(1) In a system with a dual switching control function, the control unit of the standby system can collect necessary information asynchronously from time to time when necessary via the communication memory 4, so the initial setting of the standby system at the time of switching is possible. Alternatively, stable continuous operation is possible immediately upon switching without requiring sophisticated control for synchronized operation of the active system and standby system.

(2) The fault monitoring control unit is not involved in the processing of the operational system, and only needs to perform processing of fault detection and notification, which is also effective for distributed processing of control. Furthermore, depending on how the communication memory 5 is used, the active system can subdivide the failure details and file them, allowing the failure monitoring control unit to analyze the failure contents in various ways, as well as giving accurate switching instructions to the backup system. I can do it. This is also very effective in tracing failure history during maintenance.

(3) The communication memory is divided into two independent configurations, and the functions of each memory are clearly defined, making memory access easier, reducing the software control burden, and improving reliability during switching. It happens. Furthermore, since only a memory is provided, the circuit scale itself becomes small, which also contributes to improved reliability.

(4) Since signal lines are connected from each control unit to the fault monitoring control unit, hardware failures can also be detected, and the details of the failure at the time of switching can be analyzed in a more sophisticated manner.

(5) Even if an abnormality occurs in the fault monitoring control unit, the active/standby control units are connected via the communication memory 5, so they will not be affected by the abnormality in the fault monitoring control unit.
It is possible to continue operation independently.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 3 is a diagram for explaining the present invention in detail, and FIG. 4 is a conventional example. FIG. 3 4 1 Active system control unit Standby system control unit - Failure monitoring control unit 4. 5-Communication memory 7, signal line 0 line control section

Claims (1)

[Claims] In a redundant CRP line control system that includes an active system control unit (1), a standby system control unit (2), and a fault monitoring control unit (3) that monitors their operations, the active system control unit ( 1) and a backup system control section (2), and a first communication memory means (4) for storing the operating state of the active system control section; ) and a fault monitoring control unit (3), a second communication memory means (5) for storing fault information of the active system control unit (1), and the active system control unit (1) and the standby system control unit (2) and the fault monitoring control unit (3), and the active system control unit (1 ) A double switching system for CRP line control, characterized in that when a failure is detected in the communication memory means (4), the standby system control section is switched as the active system according to the contents of the communication memory means (4).