基于SDN的服务驱动组播的设计与实现  

Design and Implementation of Service Driven Multicast for Software Defined Network

作　　者：陈红 刘宁春 郜帅[1] 周华春[1] CHEN Hong;LIU Ning-chun;GAO Shuai;ZHOU Hua-chun(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《计算机技术与发展》2020年第12期130-135,共6页Computer Technology and Development

基　　金：国家重点研发计划(2019YFB1802503);装备预先研究项目(JZX2017-1000/Y312-01)。

摘　　要：为了使组播路由与组播用户的服务需求相匹配,提升用户的组播使用体验,结合软件定义网络(software defined network,SDN)独有的路由与转发分离特点,设计并实现了基于SDN的服务驱动组播路由方案。该方案通过对Dijkstra算法进行改进,将组播用户的服务需求加入到组播路由的计算过程中,控制器可以根据用户需求实时更新组播路由并下发符合需求的新流表到交换机,实现根据用户需求动态调整组播路由的基于SDN的服务驱动组播路由机制。该机制拥有完整的组播流程,集组播建立、组播接收者加入/离开、组播管理、根据用户需求动态调整组播路由等功能为一体,创新性地根据用户的不同服务需求,随时变更并下发符合用户需求的组播路径。使用Mininet平台等仿真工具对提出的方案进行了功能测试和性能测试,结果表明,基于SDN的服务驱动组播在满足用户服务需求的情况下,不会对原有组播性能造成较大影响。In order to match the multicast routing with the service requirements of multicast users and improve the user’s multicast experience,a service driven multicast routing scheme based on SDN is designed and implemented in combination with the unique separation of routing and forwarding features of SDN.In this scheme,the service requirements of multicast users are added to the calculation process of multicast routing by improving Dijkstra algorithm.The controller can update the multicast routing in real time according to the needs of users and send the new flow table that meets the needs to the switch,thus realize the SDN based service driven multicast routing mechanism that dynamically adjusts the multicast routing according to the needs of users.The mechanism has a complete multicast process,which integrates the functions of multicast establishment,multicast receiver joining/leaving,multicast management,dynamic adjustment of multicast routing according to the user’s needs,innovatively changes and issues the multicast path that meets the user’s needs at any time according to the user’s different service needs.With Mininet platform and other simulation tools to test the function and performance of the proposed scheme,the performance test results show that the SDN based service driven multicast will not have a significant impact on the performance of the original multicast when it meets the service needs of users.

关 键 词：组播路由 服务驱动 软件定义网络 受控组播 组播优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]