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Method for automatically and transparently transmitting two paths of serial signals in full-redundancy manner

A serial signal, transparent transmission technology, applied in the direction of optical fiber transmission, transmission system, digital transmission system, etc., can solve the problem of not being able to combine dual-channel fully redundant serial signals, and achieve strong real-time performance, less auxiliary devices, and low cost low effect

Active Publication Date: 2011-08-03
CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a method for automatic fully redundant and transparent transmission of dual-channel serial signals to solve the problem that the prior art cannot combine dual-channel fully redundant serial signals

Method used

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  • Method for automatically and transparently transmitting two paths of serial signals in full-redundancy manner
  • Method for automatically and transparently transmitting two paths of serial signals in full-redundancy manner
  • Method for automatically and transparently transmitting two paths of serial signals in full-redundancy manner

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Embodiment 1

[0033] How bilateral mergers work

[0034] The block diagram of the dual-channel serial signal automatic full-redundancy transparent optical transmission system (signals are relayed through optical fibers) is as follows: Figure 7 shown. In the figure, each optical transceiver can provide two independent RS422 electrical interfaces and two sets of optical interfaces. The circuit board A and circuit board B in the optical transceiver are identical, and each circuit board can independently complete the optical fiber transmission function of RS422 signals. Such as Figure 7 As shown, the electrical side outside the optical transceiver directly connects the same signal short circuit with wires and forms an RS422 interface. As long as the two optical communication links do not fail at the same time, the RS422 signal can be transmitted to the destination data terminal normally; fully realize the dual-channel RS422 automatic full-redundancy transparent optical transmission function...

Embodiment 2

[0044] unilaterally merged communication

[0045] Such as Figure 8 shown. In this mode, data terminals A and B cannot send data at the same time, but can receive data at the same time, which is suitable for some special applications; such as in the aerospace field, data terminal C is placed on the target aircraft, and data terminal A or B is used to control the aircraft , for the high reliability of the system, usually the data terminal A or B is the backup of each other.

Embodiment 3

[0047] Two independent communication methods

[0048] Application such as Figure 9 shown, in fact with Figure 4 the same as the prior art. After disconnecting the electrical signal connection between circuit boards A and B through simple operations, the RS422 communication between data terminals A and C and between data terminals B and D can be realized. When working in this state, we set a switch on the front panel of the device to cut off the signal interconnection between board A and board B, so that there is no mutual coordinated control between them.

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Abstract

The invention relates to a method for automatically and transparently transmitting two paths of serial signals in a full-redundancy manner, which comprises the steps of: directly short-circuiting two paths of mutually independent serial buses, and adding a control enabling signal for a serial port driver corresponding to each path of serial signals; when the two paths of signals are valid or failed or idle, enabling two control enabling signals to be valid; and when one path of the two paths of signals is failed or idle and the other path is valid, enabling the control enabling signal of the failed or idle path to be invalid, enabling the control enabling signal of the valid path to be valid. Because the control enabling signals exist, when the two paths of independent serial buses are short-circuited, an invalid transmission channel is automatically shielded without causing transmission error codes, and actual full-redundancy transmission can be realized; meanwhile, completely transparent transmission is obtained without other single-point devices and other protocol conversion devices.

Description

technical field [0001] The invention relates to the field of redundant transmission of serial signals, in particular to a method for automatic fully redundant and transparent transmission of dual-channel serial signals. Background technique [0002] Regarding the redundant transmission of serial signals, there are currently three technologies for redundant transmission of dual-channel serial signals, all of which take RS422 as an example: [0003] a) Pseudo redundant mode [0004] Such as figure 1 , the two RS422 signals are respectively converted into optical signals by optical transceiver 1 (optical transceiver 2), transmitted to optical transceiver 3 (optical transceiver 4) through optical fiber, and then converted into RS422 signals, and connected to a "2 in 1 device". An optical transceiver is a device that converts optical signals into electrical signals, and has no effect on transparent transmission. [0005] This method has two RS422 signal transmissions, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/22H04B10/12H04B10/032H04B10/25
Inventor 陈旭辉魏利民陈志俊乔东旭李森
Owner CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD