JP3130711B2 - Protocol monitor device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protocol monitor device, and more particularly to a protocol monitor device used for maintenance operation of an ISDN exchange and capable of selectively monitoring communication between specific user terminals.

[0002]

2. Description of the Related Art Generally, when information is transmitted and received via a communication line or the like, it must be performed in accordance with a predetermined protocol. If necessary, verification of whether communication is performed in accordance with the protocol is performed. Is performed. FIG. 2 shows a conventional configuration for monitoring a protocol for communication between terminals connected to a switching network. In FIG. 2, two exchanges 22 and 24 are provided, and these are mutually connected via a network 23. Each of the exchanges 22, 24 has a user terminal 21,
25 are accommodated. The monitoring of the protocol related to the specific user terminal 21 is performed by a maintenance person directly going to the exchange 22 in which the specific user terminal 21 is accommodated, and a measuring instrument (protocol monitor) 26 is connected to the exchange 22.
This is done by connecting to

Here, in the case of ISDN, that is, at least the user terminal 21 is an ISDN terminal and the exchange 22
Is an ISDN exchange. User terminal 21
To selectively monitor only the communication to the user terminal 25 of the other party from the service access point identifier (SAPI) and the call number (CR) in the case of the circuit switching service, and in the case of the packet switching service. If so, it is necessary to specify the logical channel number (LCN) and the logical channel group number (LCGN) as filter parameters, respectively, and extract only data having the specified filter parameters. These SAPIs,
Each CR or LCN, LCGN parameter is specific to a particular user-to-user communication. Therefore, when monitoring only the communication from the specific user terminal 21 to the specific partner user terminal 25, the maintenance person estimates the above-mentioned filter parameters by himself, sets the estimated value, and monitors the monitor. When the estimation was incorrect, the setting was reset.

[0004] As a protocol monitor device applied to ISDN, Japanese Patent Application Laid-Open No. 3-99552 discloses a device which is connected to an in-house bus line and monitors data on the bus line. Japanese Patent Laid-Open Publication No. 3-49329 discloses a packet communication system using ISDN, in which a monitor device is provided in each ISDN exchange, and data obtained by these monitor devices is collated at a remote location.

[0005]

The above-mentioned conventional protocol monitoring method includes a method in which a maintenance person is directly involved in monitoring only communication between specific user terminals regardless of a circuit switching service or a packet switching service in ISDN. Go to the site, SAPI or CR, or LCN or LCG
Since it is necessary to set filter parameters such as N, there is a problem that it is difficult to perform remote maintenance. Further, since the above-described filter parameters are set based on the estimation, there is a problem that trial and error is involved, and operability and workability are poor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a protocol monitor device capable of automatically setting a filter only by inputting a user address from a remote place and selectively monitoring only communication between specific user terminals. It is in.

[0007]

SUMMARY OF THE INVENTION A protocol monitor apparatus of the present invention issues an instruction to perform a protocol monitor, and outputs a first instruction.
A control terminal for maintenance that outputs first user address information corresponding to the first terminal and second user address information corresponding to the second terminal, the instruction from the control terminal, and the respective user address information Transmitting and receiving means for receiving the monitoring result to the control terminal; extracting means provided in the ISDN exchange for extracting the communication content of the first terminal according to the first user address information; A call setting frame or a call request packet frame is extracted from the communication contents extracted by the means, and it is determined whether the user address in the contents of the extracted frame matches the user address indicated by the second user address information. Judgment, and when they match, the filter parameters are specified from the contents of the frame and automatically set, and thereafter, the communication parameters extracted by the extraction means are used. Monitoring means for monitoring only the frame corresponding to the filter parameter, accumulating means for accumulating the monitoring result by the monitoring means, and transmitting the monitoring result to the control terminal via the transmitting / receiving means in accordance with an instruction from the control terminal. Transfer means for transferring.

[0008]

A transmission / reception means to which a control terminal for maintenance is connected is provided, and an instruction for protocol monitoring, user address information, and a monitoring result are exchanged between the control terminal and the transmission / reception means. Area-free maintenance on the ground is possible. In this case, the control terminal and the transmitting / receiving means can be connected via a public packet network. Since the extracting means is provided in the ISDN exchange, it is possible to extract only the communication contents of the first terminal specified by the first user address information. further,
From the communication contents of the first terminal, a call setting frame (SET
UP frame) or call request packet frame (CR
Packet frame) is extracted, and it is determined whether or not the user address in the content of the extracted frame matches the user address indicated by the second user address information. If they match, a filter parameter is specified from the content of the frame. Then, since there is a monitoring means for monitoring only the frame corresponding to the automatically set filter parameter among the communication contents of the first terminal, a specific terminal (first terminal) Counterpart terminal (second terminal)
Only the communication to the server can be selectively monitored.

In general, services provided by ISDN are broadly classified into circuit switching services and packet switching services. In the case of circuit switching services, call setting frames (S
An ETUP frame is extracted, and a service access point identifier (SAPI) and a call number (CR) are automatically set as filter parameters. On the other hand, in the case of the packet switching service, a call request packet frame (C
An R packet frame is extracted, and a logical channel number (LCN) and a logical channel group number (LCGN) are set as filter parameters.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a protocol monitor device according to one embodiment of the present invention.

The ISDN exchanges 2 and 4 are interconnected via a network 3. The first ISDN exchange 2 accommodates the user terminal 1 of originating (arriving) credit, and the second ISDN
The exchange 4 accommodates a user terminal 5 of incoming (outgoing) credit. Inside the first ISDN exchange 2, the ISD
An extraction unit 6 for extracting communication contents of a specific terminal accommodated in the N exchange 2 is provided. The terminal to be extracted by the extraction unit 6 can be arbitrarily set by inputting the user address of the terminal from outside.

An exchange maintenance and operation device 7 is connected to the first ISDN exchange 2. Exchange maintenance and operation equipment 7
Is used for remote maintenance of the ISDN exchange 2, and necessary information is exchanged with a control terminal 9 provided in a maintenance center at a remote place via a public packet network 8. . The control terminal 9 is used for the maintenance and operation of the ISDN exchange 2. In particular, the control terminal 9 issues a protocol monitor instruction to the exchange maintenance and operation device 7, sends user address information to the exchange maintenance and operation device 7, It is configured to receive the monitoring result from the maintenance operation device 7, translate the monitoring result, and display it to a maintenance person.

The main unit 10 of the protocol monitor device is connected to the exchange maintenance and operation device 7. A line interface unit 11, an automatic filter unit 12, a control unit 13, and a storage unit 14 are provided inside the main unit 10. The line interface unit 11 is a part for interfacing with the exchange maintenance and operation device 7 and receives the communication contents extracted by the extraction unit 6 in the ISDN exchange 2. The automatic filter unit 12 extracts a call setting frame or a call request packet frame from the communication content extracted by the extraction unit 6, and the user address in the content of the extracted frame is transmitted from the control terminal 9 to the user. It is determined whether the address matches the user address indicated by the address information. If the address matches, the filter parameter is specified from the contents of the frame and automatically set. After the automatic setting of the filter parameters, the automatic filter unit 12 monitors only the frames corresponding to the set filter parameters out of the communication contents extracted by the extracting unit 6. The storage unit 14 is for storing the monitoring result of the automatic filter unit 12. The control unit 13 controls the entire operation of the main unit 10, and receives an instruction from the control terminal 9 and user address information via the exchange maintenance and operation device 7, and receives a monitor obtained by the automatic filter unit 12. The result is stored in the storage unit 14, and the monitoring result stored in the storage unit 14 is transmitted to the control terminal 9 via the exchange maintenance and operation device 7.
It is for transferring to.

Next, the operation of this embodiment will be described. Specific user terminal accommodated in first ISDN exchange 2 (first user terminal 1) and specific user terminal accommodated in second ISDN exchange 4 (second user terminal 5)
If you want to selectively monitor only the communication between
An instruction to monitor the protocol between the data terminals 1 and 5 from the control terminal 9 in the maintenance center to the exchange maintenance and operation device 7 via the public packet network 8 and user address information for each of the user terminals 1 and 5 Send The exchange maintenance and operation device 7 receives the instruction from the control terminal 9 and the user address information, and instructs the first ISDN exchange 2 to extract the communication content of the contained first user terminal 1. I do. In response to the extraction instruction, the extraction unit 6 refers to the user address information corresponding to the first data terminal 1, extracts the communication content of the first user terminal 1, and extracts the communication content of the first user terminal 1 via the exchange maintenance / operation device 7. Transmit to the unit 10. At the same time, the exchange maintenance and operation device 7 transfers the user address information corresponding to the second user terminal 5 to the control unit 13.

In the main unit 10, the communication content of the first user terminal 1 extracted by the extraction unit 6 is first received by the line interface unit 11. Under the control of the control unit 13, the automatic filter unit 12 sets the call setting (SET) in the case of the circuit switching service based on the extracted communication contents.
(UP) frame is extracted, and in the case of the packet switching service, a call request (CR) packet frame is extracted, and the destination (originating) user address described in the content of the extracted frame is stored in the second user terminal. Is searched for a match with the user address. As a result of this search, if a call setup frame or a call request frame with a matching user address is found, filter parameters are extracted from the found frame and automatically set. In the case of a circuit-switched service, a service access point identifier (SAPI) and a call number (CR) are extracted as filter parameters. In the case of a packet-switched service, a logical channel number (LCN) and a logical channel group number (LCGN) are extracted. Extracted as filter parameters.

When the automatic setting of the filter parameters is completed, the automatic filter section 12 starts monitoring according to the set filter parameters. In other words, the communication content extracted by the extraction unit 6 is sequentially input to the automatic filter unit 12, but the automatic filter unit 12 only outputs the frames of the input communication content that correspond to the automatically set filter parameters. Monitor The monitoring result is temporarily stored in the storage unit 14 via the control unit 13. At the same time, header information to which time information and a frame number are added is created, and the header information is
The header information is translated and displayed on the control terminal 9 via the control terminal 9.

The maintenance person checks the displayed header information, issues an instruction from the control terminal 9 if necessary, and
4 is searched for the monitoring results stored therein. as a result,
The necessary monitoring results are transferred from the storage unit 14 to the control terminal 9 via the control unit 13 and the exchange maintenance and operation device 7,
Translated and displayed.

[0018]

As described above, the present invention provides transmission / reception means to which a control terminal for maintenance is connected, and provides an instruction for protocol monitoring, user address information, and a monitoring result between the control terminal and the transmission / reception means. Is exchanged,
There is an effect that area-free remote maintenance becomes possible. Also, a call setup frame or a call request packet frame is extracted from the communication content of the first terminal, and whether the user address in the content of the extracted frame matches the user address indicated by the second user address information Is determined, and if they match, a filter parameter is specified from the contents of the frame and automatically set, and thereafter, only a frame corresponding to the automatically set filter parameter in the communication contents of the first terminal is monitored. Because of the means, it is possible to set a filter by a user address.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a protocol monitor device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional configuration for monitoring a protocol.

[Explanation of symbols]

 1,5,21,25 user terminal 2,4 ISDN exchange 3,23 network 6 extraction unit 7 exchange maintenance and operation device 8 public packet network 9 control terminal 10 main unit 11 line interface unit 12 automatic filter unit 13 control unit 14 storage unit 22, 24 exchange 26 measuring instrument

Continuation of the front page (72) Inventor Shinichi Yoshida 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-3-173257 (JP, A) JP-A-4- 260259 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) H04M 3/00 H04M 3/08-3/40 H04M 7/00-7/16 H04L 12/24 H04L 12/26 H04Q 1/20-1/26

Claims (2)

(57) [Claims] 1. A protocol monitor device used for maintenance operation of an ISDN exchange, which issues an instruction to perform a protocol monitor, and outputs first user address information corresponding to a first terminal and a second user terminal information corresponding to a second terminal. A control terminal for maintenance that outputs second user address information to be transmitted, a transmitting / receiving unit that receives the instruction from the control terminal and each of the user address information, and transmits a monitoring result to the control terminal; Extracting means for extracting the communication content of the first terminal according to the first user address information; and a call setting frame or a call request packet from the communication content extracted by the extracting means. A frame is extracted, and a user address in the content of the extracted frame matches a user address indicated by the second user address information. Monitoring means for identifying and automatically setting a filter parameter from the contents of the frame when they match, and thereafter monitoring only a frame corresponding to the filter parameter in the communication contents extracted by the extracting means A protocol monitor device comprising: a storage unit configured to store a monitoring result of the monitoring unit; and a transfer unit configured to transfer the monitoring result to the control terminal via the transmission / reception unit. 2. The protocol monitor device according to claim 1, wherein said control terminal translates and displays a monitor result, and said control terminal and said transmitting / receiving means are connected via a public packet network.