JPH03201634A - Maintenance information transfer system - Google Patents

Abstract

PURPOSE:To read maintenance information from a host device at anytime and to easily collect the maintenance information at real time whenever the host device requires the information by providing a maintenance information memory, memory clearing means and maintenance information updating means. CONSTITUTION:When an event to update the maintenance information is generated at an information transmitter-receiver 30, maintenance information updating means 32 and 37 are activated to update the maintenance information, which are stored in a maintenance information memory 30, concerning the generated event. In such a manner, the contents of the maintenance information memory 330 are always updated to the latest state. Since the maintenance information memory 330 is not set in the direct control of a central processing unit 32 at the information transmitter-receiver 30, the host device 40 can execute read access to the area of the maintenance information memory, where the required maintenance information are stored, at an arbitrary time point. Thus, the maintenance information can be collected at real time whenever the host device 40 requires the information. Further, the ability of a slave device 30 to be consumed for a monitoring operation processing can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention is directed to high-level data link control (HD
The present invention relates to a maintenance information transfer method in a system including an information transmitting/receiving device that follows a transmission control procedure such as LC) and its host device.

[Prior Art] A conventional system configuration including an information transmitting/receiving device and its host device is shown in FIG. 2, and the conventional system configuration will be explained below with reference to FIG. Publication> The system shown in FIG. 2 includes an information transmitting/receiving device IO, its higher-level device 20, and a lower-level device (not shown) of the information transmitting-receiving device 10.The information transmitting-receiving device 10 has a transmitting/receiving interface with the lower-level device. A serial data interface (SDI) 11, a processor (CPU) 12 that controls the entire device, and a plurality of page memories 130 that temporarily store information to be sent and received...Yumi, 3n
-1, 13n, information transmitting/receiving device 10 and host device 20
Event 1, which is responsible for sending and receiving commands and status between
It consists of circuits 14 and 15.

The basic communication protocol applied to such systems is the seven-layer Open System Interconnection (O8) standardized by the International Organization for Standardization (RSO) and others.
I) is the basic reference model.

The information transmitting/receiving device 10 described above is in charge of a function corresponding to the second layer (data link layer: L2), and the protocols used are, for example, CCITT (International Telegraph and Telephone Consultative Committee) Recommendations 1440 and I441. Standardized L
A P D (link Access Process
dure ont)+e[)-channel). In addition, the host device 20 is in charge of a function corresponding to the 37th fl (network layer: 3).

Figure 3 shows the logical concept of the CmaO8I basic reference model! ,
7"S, and the information transmitting/receiving device 10 in FIG.
Corresponds to L,2. The second layer L2 is physically the first layer L
Although it is opposed via L, logically it is the second of the opposing system.
) directly connected to rAL2. L A P mentioned above
D is standardized based on HDLC, and high-level procedures such as order control and retransmission control are performed in a closed manner within the second layer 1 and 2.

Therefore, in order to configure the information transmitting/receiving device to in a closed form at the 2nd JM L2 as shown in Figure 2, it is necessary to have a temporary storage function for information to be transmitted and received, and a host device for information transmission/reception, registration, and reporting. A command/status exchange function with 20 is required. In Gokai in Figure 2, both of these functions are layered, and the page memory 1 accessible from 2/L3 is
30 to 13n and event I circuits t4 and 15.

The page memories 130 to 1.3n temporarily store one block of information to be sent and received, and are each independently controlled and can store 01012 minutes. Event circuit 14.15
are circuits for transmitting and receiving commands/status between each layer L3/L and 2, respectively.

The operation of transmitting information between the own system including the information transmitting/receiving device 10 and the -L device 20 and an opposing system (not shown) will be described below.

When transmitting information from the higher-level device 20 in its own system to the higher-level device in another system, the higher-level device 20 notifies the CI U 12 of a command indicating transmission using the event circuit]4. When the CI) U l 2 receives this command, it hunts for an unused page memory among the page memories 130 to 3n, and uses the event circuit 15 to notify the host device 20 of the hunted page memory number. The host device 20 writes the information to be sent to the instructed page memory and sends the sending request to the CPU 1 using the event I circuit 14.
Send to 2. - (j) When U12 learns of this sending request, it activates serial data interface (1) and sends information to a higher-level device in another system.

In the case of an information receiver, this operation is reversed. Detailed explanation will be omitted.

In a system that sends and receives information using sophisticated and complex transmission control procedures as described above, maintenance information such as the number and content of information transmission errors is important from the viewpoint of maintenance, reliability, and service. It becomes necessary.

Next, a maintenance information transfer method will be explained.

Assume that the host device 20 wants to monitor transmission and reception operations with other system host devices for a certain period of time. The host device 20 sends the monitor request command 1 to C via the event circuit 14.
Let me know about PLJ12G. At this time, CPll,2 specifies which memory pages are available for use in the monitor operation. Using this request as a trigger, the CPU 12 starts the monitoring operation of the transmitting/receiving operation, and sequentially stores the results in the designated page memory. When the designated time comes, the first-place device 20 is notified via the event circuit 15 that the monitoring operation has ended (status). At this time, the page memory number is added and notified.

[Problems to be Solved by the Invention] However, in response to a monitor request from the top 1 z device 20 (L3), the information transmitting/receiving device 10 (L2) performs monitoring processing while using the page memories 130 to 13n,
Each layer L2/L will be notified after the completion of Monitor 511 work.
The method of transferring maintenance information through exchanging commands/status between the three systems had the following problems.

Since commands/status are exchanged between each ffil, 2/L3, control at the upper layer L3 becomes complicated. In addition, since the lower layer L2 performs monitoring operation processing in response to a monitor request, the lower layer L2 in response to the request
As a result, it takes time to collect maintenance information at the time of a failure in the upper layer L3 and to process the collected information after the failure (11), resulting in a decrease in service quality. Furthermore, since the CPU 12 of the lower layer L2 is devoted to monitoring operation processing, the normal information transmission/reception processing capacity is reduced at this time, and information transmission/reception takes time.

The present invention has been made in consideration of the above points, and -
Eliminate command/status control for transfer of maintenance information between higher-level devices and lower-level devices (information transmitting/receiving devices),
To provide a maintenance information transfer method that allows a first-ranked device to collect maintenance information in real time whenever necessary and to reduce the capacity of lower-order devices spent on monitoring operation processing.

[Means for Solving the Problem] In order to solve the problem, in the maintenance information transfer method according to the present invention between an information transmitting and receiving device using a transmission control procedure and its −E-position device, the information transmitting and receiving device has the following steps. The following measures were provided.

In other words, the maintenance information memory that temporarily stores maintenance information to be sent to the host device, and the maintenance information memory area from which the maintenance information was read after the host device completes the read access to the maintenance information memory, are cleared. A memory clearing means and a maintenance information updating means for updating information in a corresponding area of the maintenance information memory when maintenance information is updated within the information transmitting/receiving device are provided. The host device can read the maintenance information stored in the maintenance information memory at any time.

[Operation] When a maintenance information update event occurs in the information transmitting/receiving device, the maintenance information updating means is activated. At this time, the maintenance information updating means updates the maintenance information stored in the maintenance information memory regarding the event that has occurred; in this way, the contents of the maintenance information memory are always updated to the latest state.

Since the maintenance information memory is not under direct control by the central processing unit of the information transmitting/receiving device, the host device can at any time access the area of the maintenance information memory that stores the required maintenance information. Read can be accessed. The memory clearing means clears the area of the maintenance information memory from which the maintenance information has been read after completion of the read access made by the host device to the maintenance information memory.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a system configuration to which a maintenance information transfer method according to an embodiment of the present invention is applied.

The system shown in FIG. 1 includes an information transmitting/receiving device 30 responsible for processing the second layer L2, an upper device 40 thereof responsible for processing the third layer, and an information transmitting/receiving device 30 (not shown) responsible for processing the first layer L1. and lower-level devices.

The information transmitting/receiving device 30, like the conventional device, has a serial data interface (SDI) 31 which is a transmitting/receiving interface with lower-level devices, and a processor <CI) 32 which controls the entire device, and transmits/receives information. Multiple page memories 331, . . . 33n for temporary storage
-1, 33n, information transmitting/receiving device 30 and -E device 40
It consists of event circuits 34 and 35 that are responsible for sending and receiving commands and status to and from the event circuits 34 and 35.

In addition to the following components, the information transmitting/receiving device 30 of this embodiment includes a page memory 330 for maintenance information, a read and clear F1136, and first and second read and count up circuits 37 and 38. It is equipped with

Since the page memory 330 for maintenance information is provided, in this embodiment, the other page memories 331 to 33n are not used for storing maintenance information, and the CPU 32 hunts free page memories for storing maintenance information. Don't do what you're supposed to do.

A newly provided read-and-clear circuit 36 is configured to provide maintenance information such as statistical information in a designated area to the host device 40 when the host device 40 performs read access to maintenance information in the area of the maintenance information page memory 33O. It serves to notify the information and also to clear the maintenance information in the specified area in the maintenance information page memory 330 when the read access is completed. That is, the host device 40
When the transfer to is completed, the maintenance information is cleared.

Also, the first read and count up 4-ro 1-ro 37
is provided to statistically collect information on the number of occurrences of Jllff order errors, retransmission processing, etc. when the CPU 32 performs frame processing. The first read-and-file 37 is a page memory 33 for maintenance information designated in advance by the CPU 32 due to order errors, retransmission processing, etc.
When area 0 is activated, the data (maintenance information) in the specified area of the maintenance information page memory 330 is automatically saved.
It plays the role of reading out the data, incrementing the data by 1, and writing this updated data into the designated area.

The second read and count up circuit 38 also realizes the same function as the first read and count up circuit 37. However, 1-7 is different from the first read-and-count-up circuit 37 in that the read-and-count-up operation is activated from the serial data interface 31. That is, when a hardware failure such as an Fe2 (frame check sequence) error or an octo error occurs in the serial data interface 31 and the serial data interface 31 is activated, the second read and count up circuit 38
autonomously reads the data in the specified area of the maintenance information page memory 330, increments the data by 1, and writes the updated fS data to the specified area.

Information transmitting/receiving device 30 and host device 40 having the above structure
The operation of transmitting and receiving information between the own system including the own system and the pond system (not shown) facing the same is the same as that of the conventional system.

That is, when transmitting information from the higher-level device 40 to another device in another system, the higher-level device 40 uses the event circuit 34 to send a command indicating the transmission (CI).
At this time, the CPU 32 informs the page memory 3
An unused one from 31 to 33n is picked)-L, and the hunted page memory number is notified to the -1 device 40 using the event circuit 35. The host device 40 writes the information to be sent to the designated page memory, and sends a sending request to the CPU 32 using the event 1 channel 34.

As a result, the CPU 32 activates the serial data interface 31 and sends out two sets of information to the host device in another system.

In the case of information reception, this operation is reversed. Detailed explanation will be omitted.

Next, a maintenance information transfer method in the system described above will be explained.

Assume that the higher-level device 40 wants to monitor maintenance information that is missed in transmission/reception operations between other systems and higher-level devices. Among the maintenance information, hardware failure information such as FCS errors and OFF I errors is available through the serial data interface 31.
CI) is constantly detecting information about protocol processing such as order errors and retransmission processing among maintenance information.
U32 is always in detection operation.

When the serial data interface 31 detects hardware failure information, it activates the second lead 7714971-771 circuit 38. At this time, the read and count up cycle 1I838 reads the maintenance information stored in the maintenance information page memory 330 regarding the hardware failure that has occurred.
．． only count up. When the CPU 32 detects failure information in protocol processing, it activates the first read and count up circuit 37. At this time, the read-and-count-up circuit 37 truncates the maintenance information stored in the maintenance information page memory 330 regarding the Fa failure in the protocol processing that has occurred by one n-currency.

In this way, the contents of the maintenance information page memory 330 are always updated to the latest state.

Maintenance information page memory 330 is not controlled by Ct) tJ 32 and read and clear circuit 36
Since the higher-level device 40 is connected to this page memory 330 via a You can read the maintenance information by When the host device 40 performs a read access to the page memory 330, the read and clear circuit 36 outputs -L in the page memory 330 for maintenance information.
The information of the designated area is read from the host device 40, and is notified to the host device 40, and the maintenance information of the designated area is cleared.

Therefore, according to the embodiment described above, the page memory 330 for maintenance information, the read-and-clear circuit #I 36, and the first and second read-and-clear circuits 37 and 38 are provided, and the host device 40 By making it possible to read maintenance information at all times, the following effects can be obtained. That is, reading control of the maintenance information of the host device 40 can be made easier than in the past. Since a response is returned to the higher-level device 40 in real time, the higher-level device 40 can immediately focus on failure recovery processing, and can improve the quality of service products. Furthermore, the CPU in the information transmitting/receiving device 30
32 processing capacity has also been improved, making it possible to realize a high-quality system.

In addition, in the above-mentioned embodiment, jl (the second T in this reference L del) of the seven-layer open system interconnection
Although we have described the case where maintenance + lIi information is transferred between V1t,2 and the third layer L3, it can be applied to the case where maintenance information is transferred between other eyebrows.Furthermore, it is a basic reference for interconnection between open systems. Regardless of the model, it can be widely applied to cases where maintenance information is transferred between a higher-level device and a lower-level device.

[Effect of the invention 1 As described above, according to the present invention, the top-ranked ? Clears the maintenance information memory where maintenance information is temporarily stored to be sent to the maintenance information memory, and the maintenance information memory area where the maintenance information has been spilled after completion of the read access performed by the host device to the maintenance information memory. and a maintenance information update means that updates the information in the corresponding area of the maintenance information memory when maintenance ↑I'I information is updated in the information transmitting/receiving device. Since the information can be read, maintenance information can be easily collected by the host device in real time whenever necessary, reducing the capacity of the information transmitting and receiving device to process monitor operations. It is possible to immediately respond to 11 processing for failure recovery in the device and improve service quality.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the system configuration to which the maintenance information transfer method according to the present invention is applied, Figure 2 is a block diagram showing the system configuration to which the conventional method is applied, and Figure 3 is a conceptual diagram showing the O8I basic reference model. be. 30... Information transmitting/receiving device, 31... Serial data interface, 32... CI)tJ, 330...
Page memory for maintenance information, 36... Read and clear circuit, 37. 38... Read and count up circuit, 40... Host device. 10 Information transport receiving device (Fig. 2)

Claims (1)

[Claims] In a maintenance information transfer method between an information transmitting/receiving device using a transmission control procedure and its higher-level device, maintenance information is temporarily stored in the information transmitting-receiving device to be transmitted to the higher-level device. an information memory; a memory clear means for clearing an area of the maintenance information memory from which maintenance information has been read after completion of read access performed by the host device to the maintenance information memory; maintenance information updating means for updating information in the corresponding area of the maintenance information memory when an update occurs, and the host device can read the maintenance information stored in the maintenance information memory at any time. A maintenance information transfer method characterized by: