JPH1042042A - Protocol trace device for exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate extraction of data required by an analysis person and to use the extracted data for bus analysis in the case of programming. SOLUTION: When message information received by a protocol control section 9 is an object of trace, a trace information write instruction 106 is outputted to request read instruction of trace data by a write instruction section 10. Furthermore, the trace instruction section 10 responds to the instruction request to make a read instruction request of trace data to a protocol control section 9 and a write instruction of trace information is made to a trace memory 12 by the write instruction 106 from the protocol control section 9. The written trace information in the trace memory 12 in the trace memory 12 is read by an output from the protocol control section 9 and given to a call control section 13, which is activated, and the analysis personnel easily extracts data when desiring to extract required data and the extracted data are used for analyzing a bug in the case of programming.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protocol tracing device in an exchange, and more particularly to a protocol tracing device in an exchange for investigating an abnormality in a communication protocol.

[0002]

2. Description of the Related Art Conventionally, as this type of protocol tracing device, there is, for example, a device described in Japanese Patent Application Laid-Open No. 3-272250, and a device for tracing data when this protocol is abnormal. In such a protocol trace device, by storing only the state transition sequence in the buffer, it is possible to analyze when the protocol is abnormal.

In the apparatus described in Japanese Patent Application Laid-Open No. 2-237343, a trace buffer can obtain communication data from a line control means and store the trace data according to an instruction from the trace control means.

Further, in the apparatus described in Japanese Patent Application Laid-Open No. 1-112458, when an illegal event is detected by the communication management means, the time is confirmed, and the contents of the illegal event are converted into a format necessary for problem analysis. You can make new edits.

[0005]

However, in the conventional protocol tracing device of the exchange, the state of the protocol in communication is set as the necessity or unnecessary of data tracing at the time of message transmission / reception.
There has been a problem that data tracing cannot be performed for each subscriber line or trunk line.

In the case of a trace function that targets only when a protocol error occurs, only a data trace function that targets only when a protocol error occurs is incorporated. There was a problem that it could not be performed.

Further, the bug analysis of the program of the protocol control means is performed after the analyzer reads out the event type, the message type and the like while stopping the program with the debugger.

An object of the present invention is to store, in a memory, a transmission / reception message of a subscriber line or a trunk line designated as a tracing object in advance when an event occurs in communication, so that a protocol trace in an exchange which can always easily perform data tracing. It is to provide a device.

Another object of the present invention is to make it easy for an analyst to extract necessary data when a protocol error occurs, and to promptly investigate the cause.

[0010] Still another object of the present invention is to record the contents of an event that has occurred for each subscriber line or trunk line, and to use it for analyzing a bug in a program.

[0011]

As a means for solving the above problems, a protocol tracing apparatus in an exchange according to the present invention comprises a message transmission / reception between a subscriber line or a trunk line and a protocol control means, and a protocol control means and a call control. It is for sending and receiving messages between means.

That is, the present invention is a protocol tracing apparatus having a receiving means for receiving message information via a communication line, and controls writing of trace information when the message information received from the receiving means is to be traced. Protocol control means for outputting a control signal to be transmitted, and a trace instruction for requesting an instruction to read trace data based on a control output from the protocol control means, and in response to the request, requesting an instruction to read trace data to the protocol control means. Means, a trace storage means for instructing writing of trace information by a control signal from the trace protocol control means, and a call for reading the trace information written in the trace storage means by an output from the protocol control means and controlling the call. And control means.

Therefore, in the protocol tracing device in the exchange according to the present invention, the transmission and reception of messages such as transmission, response, disconnection, etc., which have occurred on the subscriber line or the trunk line, which is the communication line specified in advance by the trace instruction means, are performed. The protocol control means stores in the trace storage means the contents such as the time-out, the maintenance request at the time of the forced disconnection, and the like, thereby facilitating the analysis at the time of occurrence of the protocol abnormality.

Further, according to the present invention, by designating a subscriber or a trunk line whose protocol sequence is normal to the trace instructing means, the trace data can be compared with the sequence at the time of occurrence of an abnormality. The cause can be quickly clarified.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A protocol trace device in an exchange according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a block configuration of a protocol trace device according to one embodiment of the present invention. In FIG.
The protocol trace device 1 can perform message transmission and reception between a subscriber or a trunk line and protocol control, and message transmission and reception between protocol control and call control.

The protocol tracing device 1 of the present embodiment comprises:
Protocol controller 9 for performing data tracing at the time of message transmission / reception of the subscriber or trunk 7 to be traced
A trace instructing unit 10 for instructing the protocol control unit 9 from the subscriber or the trunk line 7 to be traced;
Timer monitoring unit 11 that monitors a timer when an event occurs
And a trace memory 12 for storing trace data.

The protocol controller 9 determines whether or not a message that has received the message transmission signal 100 is to be traced when transmitting or receiving a message to or from the subscriber or the trunk 7 to be traced. When the trace data is edited, the trace information writing instruction 106 is sent to the trace memory 12. The trace instructing unit 10 instructs the protocol control unit 9 to read out the trace memory 12 for the subscriber or the trunk line to be traced.

The timer monitoring unit monitors a timer when an event occurs and notifies a timeout to the protocol control unit 9. The maintenance operation management unit 8 transmits a maintenance signal such as a forced disconnection to the protocol control unit 9. Further, the trace memory unit 12 sends a trace information writing instruction 106 from the protocol control unit 9 to the trace memory 12, and
The trace information is temporarily stored in a trace information writing area of the trace memory 12.

Next, the operation of the protocol trace device in the exchange according to the embodiment of the present invention will be described with reference to an example of a hierarchical structure of the trace memory 12 shown in FIG. 2 and a sequence diagram of FIG. In the following description, reference is made to the block diagram of FIG.

In FIG. 3, a procedure for receiving a message transmission signal 100 when transmitting or receiving a message to or from a subscriber or a trunk 7 to be traced is referred to as procedure 1 (hereinafter abbreviated as T1). Next, it is determined whether or not the message at that time is to be traced (T2). When the message that has received the message transmission 100 is to be traced (YES in T2), the trace data is edited (T3).

Next, after editing the trace data,
A trace information write instruction 106 is sent to the trace memory 12 (T4). Thereafter, the protocol control unit 9 requests the trace instruction unit 10 to read out the trace memory 12 (T5). At this time, the trace instruction unit 10 issues a read response instruction 107 of the trace memory 12 to the protocol control unit 9 for the subscriber or the relay line to be traced (T6).

At this time, the timer monitoring unit 1 shown in FIG.
1 monitors a timer when an event occurs and notifies a timeout to the protocol control unit 9. As a result, the protocol controller 9 sends a message 120 to the call controller 13 (T7). The maintenance operation management unit 8
Transmits a maintenance signal such as a forced disconnection to the protocol control unit 9. As described above, the protocol trace device 1 can receive the maintenance request signal 104 at the time of transmission / reception of messages such as transmission, response, disconnection, timeout, and forced disconnection.

Also, in this embodiment, when the protocol control unit 9 receives the timer-timeout notification 103 of the event from the timer monitoring unit 11, the protocol control unit 9 notifies the trace instruction unit 10 of the subscription in which the event has occurred. Therefore, the trace memory 12 can be quickly read out to identify whether the user or the relay line 7 is a trace target. Upon receiving the request 105 to read the trace memory 12, the trace instruction unit 10 responds to the protocol control unit 9 with the subscriber number and the trunk line route number set in advance by the analyst as response data.

The protocol control unit 9 can identify whether the subscriber or the trunk line 7 where the event has occurred is to be traced from the response data from the trace instruction unit 10. When the protocol control unit 9 determines that the data is a trace target, the data of the generated event shown in FIG.
Edit to event type 202 and message type 203,
Instruction 10 for writing trace information to trace memory 12
6 can be performed. An analyst can extract the trace information stored in the trace memory 12 and use it as a means for analyzing a bug. The protocol controller 9 continues the conventional processing without writing any trace information (in the case of NO in T2) for the occurrence of an event on the subscriber line or the trunk line 7 which is not to be traced.

Therefore, in the protocol trace apparatus in the exchange according to the present embodiment, transmission / reception, transmission / reception, disconnection and other message transmission / reception, time-out, and time-out, which occur in the subscriber or trunk line designated in advance in the trace instruction unit, are performed. By storing contents such as a maintenance request at the time of forced disconnection in the trace memory 12 from the protocol control unit 9, analysis at the time of occurrence of an abnormality in the communication protocol can be facilitated.

Further, in this embodiment, by specifying the subscriber or the trunk line whose communication protocol sequence is normal to the trace instructing section 10, the trace data can be compared with the sequence at the time of occurrence of an abnormality. It is possible to quickly determine the cause of the protocol abnormality.

[0027]

As described above, the protocol trace device in the exchange according to the present invention allows the analyst to specify a subscriber line or a trunk line as a trace target in advance, and therefore, a communication protocol error occurs. Data tracing of the event can be performed only for the subscriber line or the trunk line.

Further, according to the present invention, the analyzer is not limited to a subscriber line or a trunk line in which a communication protocol error has occurred, and a normal subscriber or a trunk line can be designated as an object to be traced by an analyst. Data can be compared between a subscriber line or trunk line in which a protocol error has occurred and a normal subscriber line or trunk line, and the cause can be immediately investigated.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a protocol trace device in an exchange according to the present invention.

FIG. 2 is a diagram illustrating an example of a hierarchical structure of the trace memory illustrated in FIG. 1;

FIG. 3 is a sequence diagram illustrating an operation of the protocol trace device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protocol trace device 7 Subscriber line / relay line 8 Maintenance operation management unit 9 Protocol control unit 10 Trace instruction unit 11 Timer monitoring unit 12 Trace memory 13 Call control unit 100 Message transmission signal 103 Timer timeout notification 104 Maintenance request signal 105 Read request Request 106 Trace information write instruction 107 Read response instruction 120 Message transmission 201 Event occurrence time 202 Event type 203 Message type

Claims (4)

[Claims] 1. A protocol tracing device in an exchange having a receiving means for receiving message information via a communication line, wherein when the message information received from the receiving means is a trace target, writing of the trace information is controlled. Protocol control means for outputting a control signal; and a trace requesting a read instruction of trace data based on a control output from the protocol control means, and in response to the request, requesting the protocol control means to read the trace data. Instruction means; trace storage means for instructing writing of the trace information by a control signal from the protocol control means; and call control by reading out the trace information written in the trace storage means by an output from the protocol control means. Call control means A protocol tracing device for an exchange, comprising: 2. When a message is received from the communication line, it is determined whether or not the message is a trace target. When the message is a trace target, the trace data is edited, and then the trace data is edited. 2. A method according to claim 1, further comprising sending a trace information write instruction to a storage unit, and immediately transmitting a message to said call control unit when said instruction is not a trace target.
A protocol trace device in the exchange according to 1. 3. The protocol control means for controlling contents of an event which has occurred on the communication line designated in advance by the trace instruction means, such as message transmission / reception such as transmission, response, disconnection, timeout, and maintenance request at the time of forced disconnection. 2. A protocol trace apparatus in an exchange according to claim 1, wherein said information is stored in said trace storage means in accordance with a control command of said means. 4. The trace instructing means includes a comparing means for designating the communication line having a normal communication protocol sequence and comparing the trace data with a sequence at the time of occurrence of an abnormality. Item 2. A protocol trace device in the exchange according to Item 1.