JPS6367383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for monitoring transmission information in a communication system that transmits frame structure information including sending/receiving addresses and communication control commands.

[Prior art]

Conventionally, a monitor device with a tracing function has been used for troubleshooting communication systems, but generally it traces all frame information.
Since it converts it into a code such as hexadecimal and displays it as is, it not only requires a large amount of storage capacity, but also requires someone who is familiar with the meaning of the information content of the frame to be able to analyze it. It also has the disadvantage that analysis takes a long time and it is difficult to grasp the communication status throughout the system.

[Summary of the Invention] The present invention was made in view of the above circumstances, and its purpose is to grasp the communication status of the entire communication system from a macroscopic perspective and to easily estimate the cause of trouble occurrence. An object of the present invention is to provide a method for monitoring transmission information in a communication system.

In order to achieve such an objective, the present invention
During the frame formatting of transmission information, we focus only on the sending address, receiving address, and communication control commands, and calculate the frequency of occurrence of each type of communication control commands transmitted for each combination of sending address and receiving address. The integrated value is displayed.

Communication control commands include normal read commands, write commands, and their response commands, as well as error recovery commands, channel switching commands, etc. These various commands are used by each device connected to the communication line. By knowing how often communication errors occur across the system, you can determine whether communication errors are occurring concentratedly on a specific device.
Alternatively, it is possible to estimate whether the problem is occurring on average throughout the system due to the influence of noise or the like. Hereinafter, the present invention will be explained in detail using Examples.

[Embodiment of the Invention] FIG. 1 shows an example of the configuration of a communication system to which the present invention is applied. In the figure, 1 to 10 are devices connected to a common transmission path 11, and 12 is a monitor device for troubleshooting.

This monitor device 12 has a configuration as shown in FIG. In the figure, 13 is memory, 14 is
CPU, 15 is the interface for the specified panel,
16 is a communication interface, and 17 is a display control circuit, and the two-dot chain lines in each indicate that the range is comprised of one IC card. Reference numeral 18 denotes a designation panel consisting of a keyboard, which is used to designate functions (types of communication control commands) of information to be monitored and sending/receiving devices (addresses), as will be described later. 19 is a display made of CRT, and 20 is an internal bus that connects these.

In the above configuration, as is well known, the CPU 14 performs control operations according to a program stored in a fixed memory area of the memory 13.
The information flowing through the transmission path 11 is received via the communication interface 16, only the necessary information is taken in and checked, and the information is classified by combination of sending address and receiving address and by type of communication control command. The contents of the integration counter provided in the variable memory area of the memory 13 corresponding to the classification are set to 1.
Increment one by one. FIG. 3 shows the configuration of this integration counter. In the figure, 21 is a memory area for an integration counter provided in the variable memory area of the memory 13, and 22 is one integration counter that constitutes the memory area, and each integration counter 22 has a specific sending address, receiving address, and communication control. It supports combinations of commands for The combination of three letters on the left side of the figure indicates this. That is, i, i
+1, ... are the sending addresses, j, j+, respectively.
1, . . . are reception addresses, and k, k+1, . . . are the types of communication control commands. These necessary combinations are input in advance from the designation panel 18.

The monitor results accumulated in this way are CPU1
4 for each device, for example, the fourth
It is displayed on the display 19 as shown in Figures a and b. In the figure, 31 indicates the device of interest, and 7 indicates the aggregated results for device 7. On the other hand, 32 indicates the devices that are the communication partners, and in this embodiment, there are 10 devices from devices 1 to 10. 33 is the number of communication control command frames sent from device 7 to each device, 34 is the number of response frames sent back from each device to device 7, and 35 is communication control sent from each device to device 7. Number of command frames for 3
6 is the number of response frames sent back from device 7 to each device.

Here, in the display example of FIG. 4a, the response from device 5 to device 7 is 490 for 600 commands sent from device 7 to device 5.
On the other hand, since all communications with other devices other than device 5 are normal, it is presumed that the cause of the abnormality is on the device 5 side. .

On the other hand, in the example shown in Figure 4b, there is a discrepancy between the number of commands and responses in all communications, indicating that the entire communication system is malfunctioning due to the influence of noise, etc., rather than a specific device being malfunctioning. It is presumed that there are.

Although FIGS. 4a and 4b are examples in which only the sending/receiving commands and their response frames are displayed centering on a specific device 7, it goes without saying that other devices or commands can also be monitored in the same way.

〔Effect of the invention〕

As explained above, according to the present invention, the frequency of occurrence of each type of communication control command is accumulated for each combination of sending and receiving addresses during frame formatting of transmission information, and the accumulated value is displayed. This is not only useful for understanding the status of the entire communication system from a macro perspective and estimating abnormalities, but also for knowing the frequency of communication between each device over a certain period of time, which allows you to understand the load status of the communication system. It has the advantage that it can also be used to understand. these are,
In both cases, it is difficult to use the conventional method of tracing the information of every frame, converting it to symbols such as hexadecimal numbers, and displaying it as is.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the configuration of a communication system to which the present invention is applied, FIG. 2 is a block diagram showing an example of the configuration of a monitor device, and FIG. 3 is a block diagram showing an example of the configuration of an integration counter provided in the memory. Figure 4a and b
2A and 2B are diagrams each showing an example of a display showing the monitoring results.

Claims (1)

[Claims] 1. In a communication system that uses a frame format that includes a sending address, a receiving address, and a communication control command as constituent elements of a frame, generation of transmitted communication control commands by type for each combination of sending address and receiving address. A method for monitoring transmission information in a communication system, characterized by integrating frequencies and displaying the integrated value.