Design And Implementation Of Routing Optimization Module Of Power Communication Network Based On Blockchain

As the country accelerates the construction of the power Internet of Things,the smart grid and the energy Internet continue to develop,the types of power communication services continue to increase,and the complexity and magnitude of information interaction in the power grid is also gradually increasing.The network scalability of the traditional centralized control scheme is seriously insufficient and cannot meet the needs of the constantly developing power communication network.Therefore,the distributed control scheme with stronger scalability and richer functions has become an important research direction.However,while the distributed control architecture improves the scalability and fault tolerance of the network,it also brings about the problem of ensuring consistency.At the same time,the routing task of SDN under the distributed control architecture involves the joint allocation and calculation of resources among multiple trust domains.This thesis has done the following work in response to the above problems,mainly including three parts.(1)The inter-domain routing problem and the state consistency problem of the horizontal distributed control architecture are studied.The trusted routing mechanism based on blockchain is proposed,the routing mode of intra-domain autonomy and inter-domain blockchain coordination is designed,the network topology is analyzed,a unified information model is designed,and the trusted inter-domain routing of multi-domain cooperation is realized.Aiming at the state consistency problem in the distributed control architecture,this thesis designs a network state synchronization mechanism based on the Raft consensus algorithm.And considering the authentication efficiency and security issues of Raft,a master node selection algorithm based on reputation value is proposed.Finally,the effectiveness of the proposed mechanism is proved by simulation experiments.(2)The state consistency problem and routing security problem of vertical distributed control architecture is studied.The vertical SDN control architecture based on blockchain is designed,and the main controller is elected in each autonomous domain to upload the chain,which reduces the number of controllers on the chain and improves the communication efficiency of the network.In addition,a distributed control strategy based on PBFT is proposed for the hidden security risks of the network,a network attack monitoring module is set up,and an attack detection algorithm based on feature importance is proposed to improve the abnormal traffic detection efficiency and ensure the safe operation of the network.Finally,the efficiency of the algorithm is proved by simulation experiments.(3)Based on the previous research work,this thesis designs and implements a trusted routing system based on blockchain.The system includes functional modules such as network device management,link management,and traffic collection.Based on this system,users can not only create network topologies to construct inter-domain and intra-domain routing tests,but also generate and capture network traffic,detect the efficiency of network detection of abnormal traffic,and test network security performance.