10/100M Ethernet double interface switching method based upon carrier detect and device thereof

A carrier detection and switching device technology, applied in the direction of data exchange through path configuration, digital transmission system, electrical components, etc., can solve the problem of double redundancy of network ports and network links, and achieve high reliability and low cost Effect

Inactive Publication Date: 2010-06-23
NO 709 RES INST OF CHINA SHIPBUILDING IND CORP
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  • Abstract
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Problems solved by technology

[0004] 2. Dual redundancy of network ports and network links

Method used

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  • 10/100M Ethernet double interface switching method based upon carrier detect and device thereof
  • 10/100M Ethernet double interface switching method based upon carrier detect and device thereof

Examples

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Embodiment Construction

[0017] according to figure 1 As shown, a 10 / 100M Ethernet dual network port switching device based on carrier detection, including a network chip, switching circuit, carrier detection circuit, control logic circuit, network link A and network link B, the part inside the dotted line is located in the computer internal. The network link A is composed of transformer A, RJ45 socket A, UTP twisted pair A and port A of the Ethernet switch; the network link B is composed of transformer B, RJ45 socket B, UTP twisted pair B and the port of the Ethernet switch B composition. The network chip referred to in this picture is DM9008, which is also applicable to other 10 / 100M network chips; the switching circuit is composed of two pieces of double-pole double-throw relay G6A234P, and the two pieces of G6A234P respectively complete the TX differential signal and RX differential signal in the twisted pair. Switching; the carrier detection circuit uses a dual-circuit voltage comparator MAX907...

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PUM

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Abstract

The invention relates to a 10 / 100M Ethernet double interface switching method based upon carrier detect and a device thereof. According to the principle of automatic negotiation mechanism, the method detects the working state of the link by hardware method in no association with application software and operating system, and all hardware completes automatic switching between double redundant network interfaces and link. By using all hardware method, the invention monitors the working states of network card and network link, wherein the network link is switched to a standby network link in the case that the working state is in error. The invention implements quick automatic switching between two network links without interferences from the application software and the operating system and implements double link redundancy design with low cost, thereby improving the reliability of network transmission. The invention can be applied to all military and civil fields with the requirement of high network transmission reliability.

Description

technical field [0001] The invention relates to the technical fields of computer network and information technology, in particular to a method and device for switching 10 / 100M Ethernet dual network ports based on carrier detection. Background technique [0002] In some special applications, in order to improve the reliability and invulnerability of the system, it is necessary to adopt dual redundant network technology, including the following common methods: [0003] 1. Dual redundancy of network card and network link. Using two network cards and two network links, the application software regularly detects the registers of the network cards representing the connection status, and activates the standby network card when a connection error is found. Although the current mainstream operating system (such as WINDOWS, Linux) supports multiple network cards, because it is not a real-time operating system, the method of dual-network switching using software takes a long time from...

Claims

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Application Information

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IPC IPC(8): H04L1/22H04L12/28
Inventor 汤敬伟宋俊强杨允基
Owner NO 709 RES INST OF CHINA SHIPBUILDING IND CORP
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