Research On Packet Enhanced OTN Service Bearing Model In Power Grid System

Packet enhanced optical transmission networks(POTN)technology is regarded as a new technology suitable for smart grid.It combines the advantages of existing packet transport networks PTN and the optical transmission network OTN technology in the power communication network(hereinafter referred to as the power grid),it can not only be applied to the grid business with different sizes of particles,but can also carry out a unified transfer of these services through cross reuse.However,due to the complexity of the power grid business,how to make unified convergence and transmission of these power grid businesses by using POTN technology is a problem that has not been solved in the power grid system.Aiming at the above problems,the paper focuses on the design of the algorithm and the realization of the transmission system.First,design a multi-service aggregation algorithm based on POTN technology for power grid multi-business load aggregation.The goal is to minimize the total transmission bandwidth after the aggregate,so as to improve the bandwidth resource utilization of the device.Under the premise of the same source the same destination and the same properties,this paper designs a heuristic algorithm for fast iterative convergence and a convergence algorithm based on integer linear programming.Among them,the fast iterative convergence algorithm is based on the idea of first arrival and first processing after the bandwidth descending order,and the integer linear programming is based on the ILP problem under the constraint conditions of each device port convergence bandwidth is no larger than the port total bandwidth.The performance of the two convergence algorithms in two scenarios of random access service bandwidth and fixed access service bandwidth(155M,GE,2.5G,etc.)is simulated and compared.The results show that compared with the traditional OTN technology,the two algorithms can achieve the effect of saving the total output bandwidth of the output port.However,the integer linear programming convergence algorithm has a better convergence effect.From the viewpoint of algorithm complexity and convergence calculation time,the way of quickly iterates is better.In second,through the grid service POTN equipment converged to business group as the unit of unified transmission,the routing strategy for a single traffic routing problem may not be used directly.In this paper designs a routing algorithm that is suitable for business groups and develop the corresponding simulation software.The simulation software can select service groups based on the existing topology resources and keep updating the link resource status of the entire network under the premise of ensuring the isolation of different types of services.The experimental simulation shows that the route selection algorithm and the developed simulation software can well realize the route selection and resource allocation of the business group after the convergence.Through simulation comparison with non converging grid business,it is proved that using POTN technology retransmit business after converge is feasible and effective.It can not only meet the transmission needs of power grid business,but also improve the efficiency of link resources,having certain advantages.