Service-Based Virtual Resource Mapping Algorithm In Electric Communication Network

With the rapid development of network management technology and the increasing demand of users,there are more types and numbers services carried on the electric communication network.Traditional single communication network structure can’t meet the end-to-end different transmission quality requirements.We used Fiber-Wireless(FiWi)converged bandwidth access network architecture.This architecture combines the advantages of fiber optic networks and wireless networks,it can overcame the problems of insufficient optical fiber network coverage and limited bandwidth of the wireless network.It also can support heterogeneous with electrical communications services end to end high-quality transmission.However,in the FiWi access network architecture,there is a big difference about the protocol format,resource allocation and network topology between the optical fiber network and the wireless network,which makes it difficult to achieve uniform resource scheduling for heterogeneous converged network resources.In order to solve this problem,this paper used network virtualization technology to design efficient and reasonable resource mapping algorithm to shield the difference of underlying infrastructure in FiWi access network,and to realize the optimal allocation of heterogeneous resources in electric communication network.On the issues that existed resource mapping mechanism reduces the reliability when the electric communication network failure.We proposed a load-balancing-based fault-tolerant mapping method.This method adopt the idea of redundant backup,took the network load balancing as the optimization objective and the bandwidth requirement as the constraint conditions,established a virtual resource allocation optimization mapping model based on load balancing,and designed an improved genetic algorithm to solve the mapping model.Finally,we got the optimal mapping scheme.Simulation experiments show that this method can reduce the number of services affected by a single point of failure and improve the mapping success rate and network reliability by balancing the network load.On the issues that existed resource mapping mechanism can’t meet different reliability requirements of the services in electric communication network.We proposed a service-reliability-based virtual resource mapping method.The method included establishing a primary link mapping model and a backup link mapping model,and designing an improved heuristic algorithm.First,this method used the idea of differentiating services,minimized the risk of business failures and balanced the network load,took the link failure risk and bandwidth requirements as constraints,and established the service-reliability-based primary link mapping model.Then,this method took the saving of link resources as the optimization objective and the bandwidth requirement as the constraint conditions to establish a backup link mapping model based on resource conservation.Furthermore,an improved genetic algorithm was designed to solve the primary link mapping model and the backup link mapping model to obtain the optimal mapping scheme.Simulation experiments show that this method can ensure the different reliability requirements of services,reduce the probability of network failure,and reduce resource waste in electric communication network.The application of service-based virtual resource mapping algorithm can improve the network reliability and resource utilization,and provide theoretical support for the efficient and stable operation of the electric communication network.