Research On Efficient Control Based On Blockchain For Trusted Optical Networks

With the continuous development of network applications and the increasing amount of data,the static and centralized software defined optical network control pattern is no longer able to adapt to meet the new network requirements,no matter from the perspective of security or efficiency.Therefore,more efficient and secure network control technology has become an important research issue in the communication industry.Traditional control security technologies generally rely on the blocking effect of firewall,but the passive defense method cannot absolutely block the endless network attacks.In addition,the resource complexity of current networks makes single resource optimization easy to fall into local optimal solution and subsequently reduce resource utilization efficiency.Blockchain,as an emerging decentralized network technology,can alleviate the loading and trust problems existing in various centralized network scenarios,providing a trusted decentralized networking scheme for multi-party organizations,and significantly improving the security performance of decentralized networks.This paper focuses on the important requirements of multi-party trust and resource efficiency in software defined optical network,summarizes the design principles of current optical network control structures,and constructs the optical network trust control model based on blockchain technology.Detailed analysis of security,data consistency and other issues of software defined optical networks has been carried out.The innovation scheme is designed in the direction of controller fault recovery and multi domain optical network cooperation,and the feasibility verification and performance simulation is carried out in the experimental platform.The main contents and innovations of this paper are as follows:Firstly,according to the distributed trust requirements in the software defined optical network,this paper focuses on the issues of node trust and data consistency in the current distributed software defined optical network control model,and then designs a blockchain-based distributed optical network trust control model.The blockchain consensus is used as a means to complete the distributed trusted networking of optical network controllers,and smart contracts are used to achieve the intelligentization of optical network services.Meanwhile,the resource load balancing mechanism is introduced into the optical network trusted control model,which can effectively integrate multi-dimensional resources in complex network scenarios and improve the efficiency of network resource utilization.Secondly,according to the requirement of control layer failure recovery in the software defined optical network,this paper focuses on the service relevance and real-time recovery in the current optical network controller failure recovery scheme,and designs a real-time failure recovery mechanism for blockchain trusted optical network.The real-time failure recovery is achieved based on the consistent data of blockchain ledger,which does not only maintain the continuous operation of services after failure recovery,but introduce the service correlation weight to further improve the QoS of services.Simulation experiment results show that under normal service traffic load environment,compared with the conventional network control scheme,this scheme has three times the fault-tolerant processing capacity,reduced the failure recovery latency by 15%to 30%,and improved network resource utilization by 20%.Thirdly,according to the requirement of multi-domarin trusted collaboration in software defined optical networks,this paper focuses on the contradiction between data sharing and privacy protection in the current multi-domain collaboration model of optical networks,and designs a cross-domain routing verification mechanism for blockchain trusted optical networks.By means of blockchain consensus and adaptive bloom filter as the data carrier,a cross-domain routing scheme with multi-dimensional resource joint optimization is provided for the multi-domain collaboration model of optical networks.The simulation results show that this scheme can effectively provide cross-domain routing services in the multi-domain collaboration scenarios of optical networks,and the error detection latency is reduced by 40%to 70%compared with the conventional scheme in the routing error scenario.