Research On Service Grooming Mechanism Of Three-Layer Multi-Granularity Optical Switching Network For Softened PCE

The rapid growth of modern network services has led to the rapid development of optical transmission networks.Optical network nodes using Generalized Multiprotocol Label Switching(GMPLS)technology need to complete a considerable amount of work during normal work,which will undoubtedly affect the performance of the network,and it is necessary to reference a new network architecture to optimize network performance.But the new architecture also requires a new business grooming algorithm to optimize the network.Therefore,this paper studies the optical network architecture and the grooming mechanism of network services.The specific content is arranged as follows:Firstly,a multi-granularity optical switching network is combined with Software Defined Network(SDN)to simplify the network structure and facilitate better network control.The stateful Path Computation Element(PCE)is introduced into the network to implement intelligent management of the network.Secondly,the traditional code group routing algorithm has disadvantages such as low service efficiency and low resource utilization during the service grooming process.Therefore,two optimized code group routing algorithms are proposed in this paper.One is a code group routing algorithm based on service priority,which prioritizes network services according to the classification rules of service levels.The stateful PCE calculates the path for the divided services,and provides the optimal transmission path resources for network services,making network service grooming more efficient;the other is a code group routing algorithm for traffic segmentation.This algorithm can segment network services and make full use of network bandwidth resources.The database holds real-time network resource information.Based on the resource information,PCE calculates the transmission path for the business,allocates reasonable network resources,improves the efficiency of business grooming,and optimizes network performance.The extended PCE Protocol(PCEP)meets normativeness and can ensure normal communication on the network.Finally,simulation analysis is performed on the throughput and blocking rate of the two proposed optimization algorithms,which proves that the two optimization algorithms have certain advantages.At the same time,capturing the extended PCEP verified the feasibility of the extended protocol.