Research On Node Structure And Algorithm Of Four-Layer MG-OXC Network Based On Code Grouped Routing

In recent years,optical network technology develops rapidly,business traffic increases quickly and the demand from users raises continuously.The above change have greatly promoted the development of optical network technology of transmission and switching.In traditional optical switching technology,there are a series of problems,for example,complex node structure;single switching granularity;slower exchange speed;huge structure scale and so on.To satisfy more and more requests from the vast majority of users and follow the development of the times,this article introduce the granularity of code,put forward the construction of code grouped routing and study on four-layer multi-granularity network based on code grouped routing deeply.The specific content as follows:Firstly,the develop condition and research status of optical switching technology are expounded briefly,the technology of traditional optical switching techniques,including optical circuit switching,optical packet switching,optical label switching and optical burst switching;generalized multi-protocol label switching and multi-granularity optical switching are introduced and analyzed simply.Secondly,relevant technologies in multi-granularity optical switching network are described in detail.Single,three-layer and four-layer optical code division multiplexing multi-granularity node construction are introduced respectively.At the same time,four-layer multi-granularity network based on code grouped routing is set up and the involved different address codes and various encoders/decoders in optical network are represented in brief,in which this paper compared and analyzed the bit error rate of both address code and resource consumption of port indifferent layers.Node structure and designed algorithm of code grouped routing are highlighted and through analyzing the establishment of code grouped routing and simulation of routing resource election,this paper presented the advantages in shortening paths,saving time and decreasing cost about four-layer MG-OXC network based on code grouped routing.Finally,the performance of network in this paper is verified and analyzed.Verify the performance of encoding/decoding in optical code division multiplexing system through Matlab,whose outcome indicated fiber brag grating encoder/ decoder can encode/decode the information of users well.Verify the performance of blocking rate and throughput at the end of article.The experiment results show the introduction of optical code granularity and the establishment of code grouped routing de crease blocking rate obviously and advance the throughput of this system evidently.