软件定义卫星网络中基于业务调度的混合路由算法  

A Hybrid Routing Based on Traffic Scheduling in Double-Layer Software Defined Satellite Networks

作　　者：王朝炜[1] 杜嘉楠 王程[1] 王卫东[1] WANG Chao-wei;DU Jia-nan;WANG Cheng;WANG Wei-dong(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《电子学报》2024年第5期1506-1515,共10页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61971054)。

摘　　要：为了解决低轨卫星网络高动态拓扑、大数据传输量、多信令开销的问题,满足全球覆盖和海量移动用户日益增长的需求,在研究不同业务性能指标体系的基础上,构建了高低轨卫星协同的软件定义卫星网络架构及虚拟拓扑模型;设计了综合考虑业务到达率和等待时长的优先级赋值函数,并提出一种基于业务感知与调度的联合星间路由算法,该算法包括针对高QoS需求业务的低复杂度轨道内优先转发路由算法和针对低QoS需求业务的链路加权路由算法.仿真结果表明,所提算法在平均端到端时延、丢包率和吞吐量等方面比传统算法均有显著的改善.In order to solve the problems of high dynamic topology,large data transmission,multi-signaling cost of low-orbit satellite network,and to meet the growing demand of global coverage and massive number of mobile users,the software defined satellite network architecture and virtual topology model of high orbit and low orbit satellite collaboration are built on the basis of quality of services(QoS)of different traffic in operational performance index systems.A priority assignment function considering both traffic arrival rate and wait time is designed,and a joint inter-satellite routing algorithm based on traffic-aware and traffic scheduling is proposed.The algorithm includes a low-complexity intra-orbit priority forwarding routing algorithm for high QoS requirement services and a link weighted routing algorithm for low QoS requirement services.Simulation results show that the performance of the proposed algorithm is significantly better than that of the traditional algorithm in average end-to-end delay,packet loss rate and throughput.

关 键 词：软件定义网络 卫星路由 业务感知路由 服务质量 虚拟节点 

分 类 号：TN92[电子电信—通信与信息系统]