JPH0235550A - Communication control equipment - Google Patents

Abstract

PURPOSE:To use a storage area effectively by changing dynamically an area where data are stored in one-to-one relation with lines and an area where data of plural lines are stored all together. CONSTITUTION:A trace area is segmented into #1 - #n and only lines (a) and (k) which are in actual operation among lines (a), (b), and (k) specified for tracing individually secure the segments #1 and #2. The line (b) can be traced individually, but no segment is secured since the line is not in operation. The remaining segments #3 - #n are linked and used cyclically as a common trace area where trace information on the line (c), etc., which are not permitted for individual tracing is stored in time series. Then when the line (b) is put in operation, the oldest segment in the common trace area of the linked segments #3 - #n is unlinked and assigned to the line (b).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a communication control device. In particular, it relates to storage means for controlling aff history of each line.

〔overview〕

The present invention improves the storage area by dynamically changing an area for storing lines in one-to-one correspondence and an area for collectively storing multiple lines in a means for storing control lines of lines by a communication control device. It is designed so that it can be used effectively.

[Conventional technology]

Conventionally, in this type of communication control device, multiple lines are controlled by a microprogram control means. In other words, in order to reduce the software burden on the central processing unit, control of communication control procedures for various lines is assigned to the microprogram of the communication control unit, but in addition to a wide variety of communication control procedures, more advanced control As a result, control of the entire communication control device has become extremely complex. For this purpose, tracing means has been adopted in which the results of transmission and reception (trace information) for each line are stored in chronological order, and this trace information is read out during maintenance and analyzed to solve problems.

FIG. 5 shows a conventional trace information storage area.

In Figure 5, line a, line b, and line indicate lines that are specified to be traced according to the line. line a, line b
, Trace information for each line in the line is stored in the corresponding trace area, and trace information for other lines other than the specified line is stored in a common trace area in chronological order.

FIG. 6 shows the contents of one trace information. The trace information is ID (Identif-) that indicates the identification of the control history.
ire) and T A (Tarmi) indicating the other party's address.
nal Addr-ess), CH (Channel) indicating the human output channel number corresponding to the line, part of the transmitted/received data, and T I indicating the relative time.
It is composed of M E (Time).

[Problem that the invention seeks to solve]

Such conventional tracing means are extremely effective means for fault analysis and maintenance, but since the trace information is stored in the storage unit within the communication control device, there is a limit to the amount of trace information that can be collected. The latest information is recorded by overwriting the previous information. Therefore, when trace information (control history) of a large number of lines is recorded, there is a drawback that the trace information of the line necessary for failure analysis is overwritten by the trace information of other normally operating lines. In order to solve this drawback, the trace area is divided into an individual trace area that individually stores only the trace information of a specified line and a common trace area that commonly stores traces of other lines. Efforts have been made to prevent it from being overwritten, but it tries to take as much individual trace area as possible within the limited storage space, and also secures individual trace area even if the specified line is not operating.
This has the disadvantage that the common trace area becomes smaller and it becomes impossible to obtain trace information for lines other than those specified.

The present invention aims to eliminate such drawbacks, and aims to provide a communication control device having means for dynamically setting a trace area.

Means for Solving Problem C] The present invention provides a storage means for storing control history information of a line controlled by the own device, and a reporting means for reporting the control history information stored in the storage means to a central processing unit. and a communication control device, wherein the storage means has a segment area divided into a plurality of segments, and a line specifying means for specifying a line in which control history information of the own line is to be stored for each line; The control history information of the lines that are not specified by the above line specifying means is stored in chronological order in an area that is a concatenation of segment areas other than the segment area in which control history information is stored for each line, and the most storage area determining means for first uncoupling the segment area in which the control history information is stored, and storing the control history information of the line newly specified by the line specifying means in the released segment area; It is characterized by

[Effect]

Trace information of the communication control device reported to the central processing unit is temporarily stored in a trace information storage means divided into segment areas. Among these segment areas, the segment areas other than the segment area in which trace information is stored in one-to-one correspondence with lines are connected, and trace information of a plurality of lines is stored in this area in chronological order. As the number of lines that store trace information increases or decreases in a one-to-one correspondence, the number of connected shared segment areas increases or decreases.

This allows the storage area to be used effectively.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block configuration diagram showing the overall configuration of this embodiment. FIG. 2 is a configuration diagram showing the configuration of the line table 14 included in the storage area determining means 13, which is a component of this embodiment. FIG. 3 is a configuration diagram showing the configuration of the storage area of the trace information storage means 12, which is a component of this embodiment.

As shown in FIGS. 1 to 3, this embodiment has a trace information storage means that has a segment area divided into a plurality of segments and is a storage means for storing control history information of a line controlled by the device itself. 12, a trace information reporting means 11 which is a reporting means for reporting the control history information stored in this storage means to the central processing unit 20, and a line for specifying the line for which the control history information of the own line is to be stored individually. The control history information of the line not specified by the line specifying means is stored in the one-to-one correspondence memory line specifying handbook 15, which is the specifying means, and the area concatenated with the segment area excluding the segment area in which control history information is stored for each line. The control history information is stored in chronological order, and the segment area in which the control history information is stored first among the connected segments is unlinked, and a line newly specified by the line specifying means is placed in this released segment area. storage area determining means I3 for storing control history information.

Next, the operation of this embodiment will be explained. FIG. 2 shows the configuration of the line table 14. The line table is a control table provided for each line, and the trace permission bit l
a, lb, lc, .lk, and pointers 2a, 2b%2C1-2 pointing to the trace area of each line. Lines whose trace permission bits are set to "1" are written to the corresponding trace area, and lines whose trace permission bits are set to "0" are written to the common trace area.

A line to be traced is specified corresponding to the line, and the trace area is divided into individual areas (segments) that can be used for each of the specified lines.

A segment is associated with a specified line, and the specified line is traced only within the corresponding segment. Unused segments are concatenated, and lines other than the specified line are traced in common among the concatenated segments. That is, as shown in Figure 3, the trace area is #
Of the lines a and bSk that are segmented into segments 1 to #n and specified to be traced individually for each line, only the lines a and bSk that are actually in operation are segmented into segments #1 and #n, respectively.
2 has been secured. Individual tracing is possible for the line, but it is not operational, so no segment is reserved. The remaining segments #3 to #n are concatenated and used cyclically as a common trace area for storing trace information of line C and other lines for which individual tracing is not permitted in chronological order. Therefore, the trace area is used without waste, and the maximum area at that time is allocated as the common trace area. After that, when the line starts working,
Among the common trace areas in which segments #3 to #n are connected, the oldest segment is disconnected and assigned to the line.

FIG. 4 is a flowchart showing the processing procedure in the storage area determining means 13.

〔Effect of the invention〕

As explained above, the present invention uses the trace area without wasting it, and allocates the maximum area at that time as the common trace area, making it easier to analyze when a failure occurs on a line where individual tracing is not permitted. It has the effect of making it easier.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a configuration diagram showing the configuration of a line table. FIG. 3 is a configuration diagram showing the configuration of the trace information storage means according to the embodiment of the present invention. FIG. 4 is a flowchart showing the operation of the embodiment of the present invention. FIG. 5 is a configuration diagram showing the configuration of a conventional trace information storage means. FIG. 6 is a format diagram showing the structure of trace information. la, lb, lc, 1-) L/- space permission bit, 2a12b, 2C12k... pointer indicating trace area, 10... communication control device, 11... trace information reporting means, 12... trace information storage means;
13... Storage area determining means, 14... Line table, 15... One-to-one correspondence storage line specifying means, 20...
Central processing unit.

Claims (1)

[Scope of Claims] 1. Storage means (12) for storing control history information of lines controlled by the own device; and reporting means (11) for reporting the control history information stored in this storage means to the central processing unit. In a communication control device, the storage means has a segment area divided into a plurality of segments, and a line specification means (15) for specifying a line in which control history information of the own line is to be stored for each line; , The control history information of lines not specified by the above line specifying means is stored in chronological order in an area that is a concatenation of segment areas other than the segment area in which control history information is stored for each line, and Storage area determining means (13) for releasing the connection of the segment area in which the control history information was stored first, and storing the control history information of the line newly specified by the line specifying means in the released segment area; A communication control device comprising: