RU2700559C2 - Computer network diagnostic system - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to computer network diagnostic systems. Computer network diagnostic system consists of a source of input stimulating actions in the form of a clock pulse generator, a test information signal generator on the operating frequency of the network and a system for comparing signals of the object of the monitored network monitoring at its output, wherein the monitored network is controlled by the communication line network cable wires, wherein clock-pulse generator is intended for pulse counter operation initialization, intended for distribution of test information signals from said test information signal generator, frequency of which corresponds to operating frequency of diagnosed network, and comparators are required for comparison of test information signals along appropriate cable conductor.

EFFECT: technical result is aimed at widening the range of tools for the same purpose.

1 cl, 1 dwg

Description

The proposal relates to computer technology, in particular, can be used in the diagnosis of wired communication between computers in a computer network.

There is a system of automated monitoring of operability and diagnostics of malfunctions of electronic equipment - patent for invention No. 2504828 - 2014 (Н04В), automated diagnostic complex - patent for invention No. 2222865 - 2004, a device for determining the location of damage to fiber optic cable (A.S. No. 2234978, (Н04В), bulletin No. 3 [1, 2].

The last of the technical solutions (patent for the invention No. 2222865-2004 - [1]) is the closest to the claimed and taken as a prototype. However, the disadvantage of this system is that it does not provide for the detection of possible distortions of information signals when transmitting a discrete signal over a wired connection.

The objective of the proposal is to identify possible distortions of the information signal during transmission from one digital device to another, since transmission failures over the network often do not allow to identify the cause of failures and there is uncertainty in the search for the cause. To eliminate this uncertainty, it is necessary to weed out the possible causes of this failure.

The solution of this problem is achieved by those that the diagnosed communication line is subjected to a test similar to its work in transmitting information. Communication lines (cable) transmit information signals similar to workers. In this case, all possible combinations of signals along the communication lines that make up the set of wires in the cable at the operating frequency of this communication line are enumerated. Possible deviations from cable manufacturing technology are taken into account: the absence of twisted wires, additional bends of individual wires in the cable, changes in the thickness of the wires in the cable, and so on. Taking into account interference in nearby wires and voltage drops, information signals can be distorted both in the direction of increasing voltages and in the direction of decreasing, then the electric unit can be perceived as zero, and the electric zero can be perceived as a unit.

Distinctive features of the prototype is that instead of software and hardware test signals, as in the prototype, cable sets of electrical signals that are similar to the working ones, both in magnitude and in composition and frequency characteristics, flow, and the proposed binary counter simulates all possible combinations of binary signals in the cable, which ensures the completeness of checking the passage of information signals on the cable. The past signals are compared with the original ones and by the coincidence of these signals they judge the serviceability of the cable connection.

Analysis of the proposed solution and prototype allows us to conclude that it meets the conditions of patentability of an application for an invention.

In FIG. 1 shows a schematic diagram of the proposed diagnostic system.

The diagnostic system consists of two clock generators, one of which is low-frequency (stimulating) - GTI1 (about 1 kilohertz), the second high-frequency (test information signal generator) - GTI2, corresponding to the operating frequency of the communication line (in this case 600 megahertz), four-bit a pulse counter (in this case, assembled on D-flip-flops), a system for distributing information signals along the wires of the cable under test, composed of 8 logical multiplication circuits. A low-frequency clock is used to initialize the operation of the binary counter and determines the time of the test. To reduce the testing time, it is necessary to increase the frequency of this generator. To increase the testing time, it is necessary to reduce the frequency of the GTI1 generator. In this case, the circuit is configured to simulate 16 combinations of information signals (all four twisted wires in the cable that are possible for this case), after which the circuit can automatically be brought back to the initial state of the counter and can be used for new testing. The system works as follows.

The test cable (in this case, 8-wire, twisted in pairs) will be connected in accordance with the above diagram. Turns on the power to all elements of the circuit. The keys are turned on (not shown in Fig. 1) the connection of the generators with the circuit, testing is being performed. The printout verifies the identity of the input and output information signals at the outputs of the comparators. In case of coincidence of the test results, the cable is recognized as serviceable, in case of discrepancy in the test results, the cable is rejected.

The operation of the circuit can be automated.

Literature.

1. Patent for invention No. 2222865. Strakhov A.F., Palkeev E.P., Strakhov O.A. Automated diagnostic complex. Date of publication: Tuesday, January 27, 2004, bull. Number 3.

2. Patent for the invention No. 2504828. Strakhov A.F., Komarov M.V., Grushkun S.V., Belova E.L. The system of automated control of operability and diagnostics of malfunctions of electronic equipment. Publication Date: Monday. January 20, 2014.

Claims (1)

A computer network diagnostic system consisting of a source of input stimulating actions in the form of a clock pulse generator, a test information signal generator at the operating frequency of the network, and a signal comparison system of the monitoring object of the diagnosed network at its output, characterized in that the object of control of the diagnosed network is the line network cable wires communication, and the clock generator is designed to initialize the operation of the pulse counter, designed to distribute test information signal from the specified generator of test information signals, the frequency of which corresponds to the operating frequency of the diagnosed network, to the corresponding wires of the specified cable using multiplication logic to check the passage of information signals through the corresponding wires, and the comparators of the signal comparison system are used to compare input and output test information signals on the appropriate cable wire.

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