Device for monitoring differential signal fault
A differential signal and fault monitoring technology, applied in measurement devices, line transmission monitoring/testing, measuring electricity and other directions, can solve the problems of inability to accurately locate replaceable units, long fault location time, and reduced transmission efficiency, achieving simple structure, Low cost and improved sensitivity
Inactive Publication Date: 2012-09-05
HUAWEI TECH CO LTD
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Problems solved by technology
[0004] Although the failure of the communication line can be monitored, the fault location takes a long time, and the field replaceable unit (FRU) cannot be accurately located;
[0005] Need to occupy high-speed communication line bandwidth to transmit verification information, reducing transmission efficiency
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[0022] Differential Signal (DS) transmission technology refers to a communication transmission technology that uses a pair of physical lines with opposite current directions and equal magnitudes to transmit signals. Such as figure 2 As shown, the sending end converts the signal to be sent into two signals with opposite voltages and the same amplitude, and transmits the signals through line A and line B respectively; the signal received by the receiving end is the difference between the two signals. The impact of external electromagnetic interference on the line is usually to change the voltage amplitude of line A and line B at the same time. In this case, the signal difference between line A and line B will basically not change, so the differential signal is basically not affected by external interference. And because the currents of line A and line B are opposite and the amplitudes are equal, the electromagnetic fields radiated to the outside are all canceled out, and the el...
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The invention discloses a differential signal fault monitoring method. The method comprises the following steps: detecting an external radiation electromagnetic field of a differential signal line, judging whether the electromagnetic field is abnormal, and if yes, providing a fault alarm. The invention also discloses a differential signal fault monitoring device. The differential signal fault monitoring method and the differential signal fault monitoring device can rapidly detect the fault of the differential signal line, independently from the signal transmission; can detect the fault under the condition that the communication driving and receiving unit is partially destroyed or in dysfunction; increases the warning sensitivity and reduces the accident level; and has the advantages of simple structure, high reliability and low cost, as compared with the prior art.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a differential signal fault monitoring device. Background technique [0002] In order to improve the reliability of communication equipment, the existing high-speed communication lines all have a certain monitoring function, and can report an alarm to the management console when the line fails. The software calibration method is often used, such as figure 1 As shown, check information is added to the information to be sent at the sending end to form a data frame including the information to be sent and a check code, and the data frame is sent; at the receiving end, the error frame or code is identified through the check code, If the error rate is higher than a certain threshold, it is considered that there is a problem with the communication line, and an alarm is reported. [0003] The software checking method of above-mentioned prior art has following shortcoming: ...
Claims
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IPC IPC(8): H04L25/02H04B14/06H04B3/46
CPCG01R31/31706
Inventor 欧健
Owner HUAWEI TECH CO LTD