Research On Routing And Wavelength Assignment Algorithm In Power Backbone Optical Transport Network

As an important part of the grid,technical support means and basic platform facilities,the electric power backbone optical transport network will bear more heavy,more comprehensive support and support tasks with the accelerating and deepening development of grid.The type and quantity of the large particle IP service in the power backbone optical transport network are increasing.So that the application of routing and wavelength assignment algorithm can improve the flexibility of power backbone optical transport network,and optimize the allocation of service resources in network,which is an important means to ensure the reliable transport of power business in the communication network.In the power backbone optical transport network,many kinds of business with different demand exist.It is necessary to realize the different service transport.So we proposed two routing and wavelength assignment algorithms for power optical transmit network based on the analysis of the current situation of the power backbone optical transport network combining with the characteristics of the bearer service and business development needs.Wave-Channel Balanced Dynamic Routing and Wavelength Allocation Algorithm(WBDRWA)establish optical path by the selection of routing domain and domain routing path.In order to ensure the reliable transport of the high level services,we take the service priority into account by giving different levels of services different routing weights.The results of simulation show that it can effectively balance the network utilization of channel resources and reduce the high level services request rejection rate.When the network has become saturated,we need to find the bottleneck link congestion in the network.Therefore,a vital link avoiding routing and wavelength assignment algorithm based on power backbone optical transport network proposed,which can dynamically distinguish network vital link according to the network topology and the traffic flow,and make the traffic transport path as far as possible to avoid the vital links.Then allocate wavelength resources for the higher priority services by step-by-step wavelength assignment strategy.Simulation results show that the proposed algorithm can allocate wavelength resources for different classes of services.The new network bottleneck link can be found when routing selection,and the algorithm can effectively avoid network key link congestion and improve the efficiency of traffic transmission.