Network coding realization method based on logical operation in optical multicast network

Abstract

The invention discloses a network coding realization method used for an all-optical multicast network. The network coding method is realized based on optical logical shift and optical logical XOR operation. A network coding node module carrying the coding method is designed for realizing the network coding method. The coding node module comprises two decoding operation modules, two optical switching devices and a coding unit, wherein the two decoding operation modules are used for reducing two lines of original signals according to different coding vectors; the two optical switching devices are used for switching different data packets into the required device according to the coding vectors; the coding unit is used for re-coding original data which is reduced or directly inputted into a node, the coding unit comprises a shift register which is used for realizing the multiplication of the coding vectors and an all-optical XOR door which is used for completing the coding operation of two lines of the data. The network coding method and the coding node module can be realized under the condition of the current optical devices in an all-optical manner.

Description

technical field [0001] The present invention relates to a method for implementing network coding suitable for all-optical multicast networks, in particular to a method for designing network coding vectors that can be realized based on all-optical XOR gates and all-optical shift registers under all-optical conditions, and in The process and control algorithm for realizing all-optical network coding under the coding vector condition belong to the technical field of optical switching network. Background technique [0002] With its high-speed, large-capacity data transmission capabilities, intelligent and flexible network management capabilities, and good robustness and survivability, optical networks have become an inevitable trend in future network development. Network coding has the advantages of improving network throughput, balancing network load, increasing network bandwidth utilization, reducing network resource loss, improving network security, and reducing energy consum...

AI Technical Summary

Problems solved by technology

However, due to the influence of the characteristics of the optical signal itself, such as high speed and simple logic, and the limitations of current optical devices, there are still many challenges in applying network coding technology to optical networks and giving full play to the advantages of both optical networks and network coding.

First of all, under the current conditions, since there are no readable and writable optical devices, the replication of information is mostly composed of optical power distribution devices such as star couplers plus optical switching matrices and wavelength converters. The structure of optical switching / routing equipment The design is very limited, and it does not have the flexibility of an electrical router; secondly, it is almost impossible to realize the complex linear operations used in traditional network coding in the optical domain. The optical signal is modulated into an electrical signal and then encoded in the electrical domain. It is a common solution to re-modulate the obtained signal to the optical domain for transmission after calculation, but this will increase the network transmission delay and reduce network performance, and will make the encoding node a system bottleneck

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