JPH0414926A - Packet switching network data collecting method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for collecting packet-switched network data for identifying faults occurring in a packet-switched network.

BACKGROUND OF THE INVENTION FIG. 3 is a block diagram showing the configuration of a packet-switched network to which an example of a conventional packet-switched network data collection method is applied.

In FIG. 3, I, 2.3.4.5 is a terminal device, and 6
．． 7 is a packet multiplexer, and 8 and 9 are packet switches. The terminal device 5 is a PT (packet type terminal),
It is housed directly in the packet switch 8. Note that the terminal device 1.2.3.4 may be either a PT or NPT (non-packet type terminal), but in the case of a PT, it is directly accommodated in the packet switch 8 or packet switch 9 like the terminal device 5. You can do it like this.

If a communication failure occurs between the terminal devices 2 and 4 while the terminal devices 2 and 4 are communicating in the packet switching network configured as described above, the failure is detected as follows. It will be done.

In other words, the communication system between the terminal device 2 and the terminal device 4 is divided into sections, the giant wire is blocked in each section, and tests are conducted for each section to detect failures and identify error points. I was trying to do that. For example, in the subscriber line section between the terminal device 1 and the packet multiplexer 6 (or the subscriber line section between the PT terminal device 5 and the packet switch 8), from the station side to the subscriber terminal side I) A large number of loopback tests were carried out for the SU (subscriber line terminal unit).

Problems to be Solved by the Invention However, as mentioned above, in the communication failure detection method, the time when the failure occurs and the inspection time are different, so it is difficult to detect failures that occur only instantaneously. The problem was that it was difficult to conduct long-term continuous tests because the line had to be blocked. There was also the problem that it was necessary to specify the section where the test was to be conducted and to dispatch test personnel to the site, which required a lot of time and expense.

As described above, in the conventional communication failure detection method in the packet switching network described above, it takes time to detect the failure location, the accuracy of failure detection is not good, and a large amount of expense is required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packet switching network data collection method that can monitor a bucket switching network in real time and detect its failures quickly, accurately, and easily. .

Means for Solving the Problems In order to achieve the above object, the present invention divides a packet switching network into sections, provides a line connection device for each section, and connects a remote testing device (RTS) to this line connection device. Furthermore, these RTSs are connected to a maintenance operation center (MAC), and the MAC monitors packets actually flowing in the packet switching network in real time via the line introduction device and the RTS. In this case, the MAC selects the R, TS 1, and line installation device based on the specification of the subscriber number, and collects the head portions of packets flowing in the sections corresponding to these.

Functions The present invention has the following functions due to the above-described configuration. In other words, when a subscriber number is specified to the MAC, the MA
Based on this designation, C selects the RTS and line installation equipment, and collects the header portion of the packet that is routed through the corresponding section.

Embodiment FIG. 1 is a block diagram showing the configuration of a packet switching network to which a packet switching network data collection method according to an embodiment of the present invention is applied. In Fig. 1, 11° and 12 are terminal devices, 1'
3.14 is a packet multiplexer (r'Mx), 1511
6 is a packet switch, 17, 1.8°, 1.9, and 20 are R and TS, respectively, and 21 is a maintenance operation center. PMX
13, the packet switch 15, the packet switch 16, and the communication lines at both ends of the PMX 14 are provided with line installation devices 22, respectively. . . 29 are provided in pairs, the line drop-in devices 22.23 are connected to the RTS17, the line drop-in devices 24.25 are connected to the RTS18, and the line drop-in devices 26.29 are connected to the RTS18. 2
7 is connected to the RTS19, and line installation devices 28 and 29 are connected to the RTS20. Also, RTS 17.18
．． 19 and 20 are connected to the MAC 21, respectively.

RTS 17.18.19.20 has an operation console 30 and is also attached with a secondary storage device (for example, a magnetic disk is used as the storage medium). In addition, in FIG. 1, the operation console 30 is shown as being equipped only on the RTSl7 for convenience, but the operation console 30 is also equipped on the RTSl 8・19°2(). is equipped with an operation console 31 and a display device attached thereto.

In this embodiment, the subscriber line section and the PMX line section are the sections to be tested. The subscriber line section is the terminal device 11 and PM
Communication line between X13 and PMX14 and terminal device 1
This is the communication line between the two. Note that if the terminal device is a PT and this terminal device is housed in a packet switch, the distance between the terminal device and the packet switch also becomes a subscriber line section. In addition, the PMX line section includes a communication line between the PMX 13 and the packet switch 15, and a communication line between the PMX 13 and the packet switch 15.
This is a communication line with PMX14. Then, the packets and frames (hereinafter referred to as packets) passing through these sections are selected, and the header portions of packets originating from/arriving at a specific subscriber and packets communicated in a specific two-party section are extracted and collected. Note that the test target sections are the sections mentioned above, but in this case, the sections in which the conditions indicated by circles in Table 1 are satisfied are targeted. In Table 1, NPT
Terminals shown as 1 are terminals that do not have the function of transmitting and receiving information in packet format. Terminals shown as HDLC are terminals that can perform transmission control according to the so-called HDLC procedure among the above NPTs. A designation monitors all buckets) (frames in the case of NPT) sent and received by one subscriber, and AB designation targets all buckets) (frames in the case of NPT) sent and received by two subscribers. Indicates to monitor.

Table 1 A Designation: Monitor of 1 subscriber AB Designation: Monitor between 2 subscribers A method for collecting data in the packet switching network configured as above will be described below.

First, the maintenance person operates the operation console 30 and specifies the line to be tested by specifying the person's number. In this case, for example, when A is specified, the number of one subscriber is supported, and when AB is specified, the number of two subscribers is supported. In addition, if the line to be tested cannot be identified by the subscriber number, accommodation type information is obtained from various databases and the point to be monitored is identified.

When a monitor point is specified by the MAC 21, a monitor execution instruction is sent to one of the RTS 17.1.8.1.9.20 (in this embodiment, the discussion will proceed as RTS 17) located at the point.

Based on the instructions given, the RTS1 7 starts monitoring the target line via the line access device 22.23, collects the buckets (or frames) for the specified subscriber as they pass, and saves the header part. After extraction, this is recorded in a secondary storage device.

In this case, an example of the header part of the bucket to be collected is
As shown in the figure. Then, to select target buckets, information obtained from a database or the like or the partner DN (dial number) written in the CR/CN pa'7y'r is used, and if the two match, the bucket is selected as a collection target.

The collected data is stored in secondary storage within the RTS17. This accumulated data is transferred to the MAC 21 according to instructions from the MAC 21. Then, if necessary, the transferred data is displayed on the display device by operating the operator console 31, and is used for data analysis to detect failures. In this case, prepare a detailed analysis program on the MAC21 in advance, and perform the MAC analysis as described above.
The data transferred to the C21 may be imported into this analysis program to perform a more detailed analysis and detect a failure.

In addition, in this test, in the case of A designation, the terminal device 1
1 and the PMX 13 and the communication line between the PMX 13 and the packet switch 15, and in the case of AB designation, in addition to the target section of the A designation, between the packet switching wall 16 and the PMX 14. communication line and PMX14
The communication lines between the terminal device 12 and the terminal device 12 are monitored.

In this way, the maintenance person can cause the RTS to perform a test simply by instructing and inputting predetermined data through the operation console 31. Furthermore, since the actual communication state is monitored without blocking the line, communication is never stopped, and if a fault occurs during monitoring, it is possible to immediately identify the faulty section. Tests can still be conducted remotely, so there is no need for maintenance personnel to go to the site each time.

As described in detail, the present invention monitors the actual communication system of a bucket switching network without affecting the line, collects and analyzes communication data from a remote location, and improves the communication of the bucket switching network. Failures can be detected quickly and accurately, and maintenance work can be carried out efficiently.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a bucket switching network to which a bucket switching network data collection method according to an embodiment of the present invention is applied, and FIG. 2 shows a header section of a packet to which the same packet switching network data collection method is applied. FIG. 3 is a block diagram showing the configuration of a packet switching network to which an example of a conventional packet switching network data collection method is applied. 11.12...terminal device, 13.14.・PMX,
15゜16...Packet switch, 17.18.19
．． 20...RTS. 21・MAC122, 23,...29...Line connection device.

Claims (1)

[Claims] A test device connected to each point of the packet switching network via a line installation device receives the specified subscriber number, collects the header part of the packet sent and received via the point, and monitors the communication data. A packet-switched network data collection method characterized by: