基于区块链的软件定义广域网系统研究与设计

Research and Design of SD-WAN System Based on Blockchain

【背景】软件定义广域网(SD-WAN)可有效解决传统的企业级广域网成本贵、部署难的问题,但目前用户在使用SD-WAN时面临着运营商锁定的问题,在一定程度上制约了SDWAN的发展。【目的】为SD-WAN提供平台化的接入调度与自动化的结算方案,解除用户面临的运营商锁定问题。【方法】通过SD-WAN与区块链技术相结合,本文提出了基于区块链的SD-WAN业务系统,利用联盟链框架,针对认证授权、流量调度、结算监管等流程进行了设计,并通过改进的共识算法增强系统的吞吐量。通过本系统,用户能够提出个性化的广域网服务需求,由系统在用户与不同的运营商间进行自动化的、不可篡改的流量调度与结算,当运营商发生违约时,用户流量可在运营商间自动切换。【结论】本系统有效解决了SD-WAN运营商锁定的问题,区块链在网络运营方面体现出了巨大的应用潜力。

[Background]Software defined wide area network(SD-WAN)can effectively solve the problems of expensive and difficult deployment of traditional enterprise-level WAN.However,the network provider lock-in problem restricts SD-WAN to a certain extent for user development.[Objective]The purpose of the research is to provide a platform-based access scheduling and automated settlement solution for SD-WAN,and to release the lock-in problem faced by users.[Methods]This paper proposes a blockchain-based SD-WAN business system,which uses the alliance chain framework to design authentication,authorization,traffic scheduling,settlement supervision and other processes.Moreover,the throughput of the system can be enhanced through improved consensus algorithms.[Results]On this system,users can customize WAN services that shift between different operators automatically with non-tamperable traffic scheduling and settlement.[Conclusions]This system solves the lock-in problem of SD-WAN effectively,and the blockchain technology shows great application potential in network operation.