基于分布式SDN机动通信系统信息同步方法  

Information Synchronisation Method for Mobile Communication Systems Based on Distributed SDN

作　　者：朱宇昂 张晨光 李昌隆 赵亚丽 ZHU Yu-ang;ZHANG Chen-guang;LI Chang-long;ZHAO Ya-li(Beijing Aerocim Technology Corporation Limited Ltd.,Beijing 102308,China)

机构地区：[1]北京航天晨信科技有限责任公司,北京102308

出　　处：《计算机仿真》2024年第6期287-292,共6页Computer Simulation

摘　　要：针对目前主流软件定义网络(Software Defined Network, SDN)控制器间信息同步方法的开销较高,超出基于分布式SDN的机动通信系统无线信道负载能力的问题,在平面型链路状态路由协议——开放最短路径优先协议(Open Shortest Path First, OSPF)的基础上提出一种可靠性较高、适应多信道共存、开销较低的信息同步方法,通过取消多区域机制避免节点机动性引起的OSPF协议区域混乱问题,简化软件处理流程,通过优化协议报文将OSPF协议由传统IP网络移植到SDN网络,通过精简报文长度、避免重复同步数据的方式降低信息同步开销。实验表明,上述信息同步方法能够在控制器之间准确同步网络信息,并且在机动通信系统规模为1:2:4时,信息收敛过程仅产生平均每端口接收0.721kB/s、转发0.873kB/s的信息同步开销,匹配无线宽带平均78.125kB/s、超短波平均2.4kB/s的负载能力,满足基于分布式SDN的机动通信系统对信息同步方法的要求。To address the issue that the information synchronization overhead of the current popular Software De⁃fined Network(SDN)inter-controller information synchronization method is high and exceeds the wireless channel load capacity of the device,the paper proposes an information synchronization method that is more reliable,adapts to multi-channel coexistence,and has less information synchronization overhead.This method is based on the planar link-state routing protocol Open Shortest Path First(OSPF).This approach streamlines the software processing flow,eliminates the multi-area mechanism that causes the OSPF protocol area confusion caused by node mobility,adapts the OSPF protocol from traditional IP networks to SDN networks by optimizing protocol messages,and lowers informa⁃tion synchronization overhead by shortening message length and avoiding redundant synchronization data.The experi⁃ment demonstrates that the message synchronization technique can precisely synchronize data between controllers,and the message convergence process only generates an average message synchronization overhead of 0.721 kB/s per port received and 0.873 kB/s per port forwarded when the size of the mobile communication system is 1:2:4,matching the load capacity of 78.125 kB/s on average for wireless broadband and 2.4 kB/s on average for ultra-shortwave,meeting the requirements of the distributed SDN-based mobile communication system.

关 键 词：信息同步 机动通信系统 软件定义网络 开放最短路径优先 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]