A method of transmitting data in one direction

Abstract

The invention discloses a method for unidirectional transmission of data, which comprises the following steps: a sending end loads the data to be transmitted into a light wave and emits the data to betransmitted, and propagates the same to a receiving end; an isolation device arranged on the optical path between the transmitting end and the receiving end passes the light wave propagated from thetransmitting end to the receiving end, the isolation device is not powered on, and the light wave propagated from the receiving end to the transmitting end can be prevented from passing through; and the receiving end receives the propagated light wave and demodulates the data. An optical path between the sending end and the receiving end is provided with the isolation device, the isolation deviceis capable of passing a light wave propagating from the transmitting end to the receiving end, while preventing the light wave propagated from the receiving end to the transmitting end from passing through, thus ensuring the unidirectional transmission of data between the transmitting end and the receiving end, and the isolation device is not powered on, has isolation function to the electric signal, and can avoid the situation of reverse breakdown caused by the voltage overload.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a method for one-way data transmission. Background technique [0002] One-way data transmission technology is a widely used network security isolation technology. The main feature of this technology is that data can only be sent from the sending end to the receiving end, and the receiving end does not have the function of sending data in reverse. Please refer to figure 1 shown. The one-way data transmission technology is of great significance in the field of network security isolation because it realizes one-way data transmission without feedback. [0003] According to different transmission media, one-way data transmission technology mainly includes the following three types: (1) one-way transmission of serial differential electrical signals; (2) one-way transmission of two-dimensional code image; (3) one-way transmission of laser. Compared with the above three data ...

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Problems solved by technology

Compared with the above three data one-way transmission technologies, the one-way transmission of serial differential electrical signals adopts differential electrical signal transmission, which is prone to electromagnetic interference or electromagnetic leakage, which reduces the security of one-way transmission

The one-way transmission speed of two-dimensional code image is slow and the bandwidth is low, so it is not suitable for high-speed data one-way transmission

[0007] However, the above-mentioned existing implementation scheme of laser unidirectional transmission has the following defects: the above-mentioned scheme completely adopts integrated circuit design, and "reverse breakdown" is prone to occur when the voltage is overloaded. After being reversely punctured, it will lead to risks such as the failure of the one-way transmission mechanism or the inversion of the one-way transmission direction

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