Research On Load Balancing Optimal Path Algorithm Based On SDN Multi-granular Optical Switching System

With the trial operation of 5G networks in some cities,the Internet industry has entered a new era,facing the high explosive traffic brought by 5G networks.The existing network architecture and network scale have already had bottlenecks in the performance of data forwarding storage.The emergence of software-defined network architecture,the idea of numerical control separation,centralized control management,open-ended resource unified deployment,and the integration of multi-granularity optical switching networks to realize the smooth development of software-defined networks to software-defined optical networks.Firstly,in the process of calculating the link weight,this paper introduces a mathematical probability model,uses the optical code link capacity analog physical bandwidth to calculate the reachability of the link,and fully considers the random fault of the link.Based on this,a link weight algorithm based on optical code occupancy rate is proposed.The algorithm topology is illustrated by a simple topology,and the complex topological results are compared with other two algorithms.The experimental results show that the algorithm is easy to implement and runs fast,which not only avoids the excessive difference between the weight values of any two links,but also overcomes the problem that the link weights in the serial link are equal.Secondly,in order to optimize the network performance,improve the load balance of the network,and obtain the optimal path under multiple conditions,and optimize the quality by using the three constraints of network throughput,optical code reservation and load balancing rate.And the code group routing technology is introduced in the process of optical code distribution to obtain the optimal path under multi-user request.The improvement of the network load balancing performance of the algorithm is analyzed.The experimental results show that under certain conditions,when multiple users request arrival at the same time,the optical code can be allocated to the whole network as much as possible.Finally,the system performance of the network system adopted in this paper is analyzed,and the performance indexes of the network are simulated and compared by using MATLAB software.Comparing the number of ports consumed by the single-layer optical cross-connect structure and the three-layer optical cross-connect structure under the same user request conditions;analyzing the effect of the optical code path on throughput and blocking rate when the load balance is the same,the result shows that The greater the number of optical code paths in the root fiber,the larger the throughput and the smaller the blocking rate,and the effect is more obvious after the introduction of the code group routing.