基于拓扑感知的软件定义卫星网络多业务路由  

Topology awareness based multi-service routing for the software-defined satellite network

作　　者：卢雪玉 魏雯婷 伏丽莹 刘丽哲 王冬冬 LU Xueyu;WEI Wenting;FU Liying;LIU Lizhe;WANG Dongdong(School of Telecommunications Engineering,Xidian University,Xi’an 710071,China;National Key Laboratory of Advanced Communication Networks,Shijiazhuang 050050,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]先进通信网全国重点实验室,河北石家庄050050

出　　处：《西安电子科技大学学报》2024年第6期10-24,共15页Journal of Xidian University

基　　金：国家自然科学基金(62102302);中央高校基本科研业务费专项资金(XJSJ23088);先进通信网全国重点实验室基金课题资助(BAX24641X002、FFX24641X006、FFX24641X007)。

摘　　要：卫星网络是构建广覆盖、巨连接、全方位、高可靠的天地一体化信息网络的关键。针对卫星网络结构复杂、业务需求多元化等问题,提出了基于拓扑感知的软件定义卫星网络多业务路由算法。为了实现灵活自适应管控,构建了星地协同的软件定义卫星网络架构。在该架构的双层集中控制平面中,高轨卫星集中感知数据平面卫星网络拓扑信息,负责提取节点及链路属性以刻画星间链路可靠性。在所提出的星地协同的软件定义卫星网络架构下,通过构建拓扑感知模型、刻画动态链路属性以及构建多业务按需路由模型,设计了基于拓扑感知的多业务按需路由算法。针对时延、带宽、可靠性敏感3类业务,选取K最短路径作为解空间,结合拓扑路径可靠性感知与业务需求偏好,合理分配链路资源以满足用户多样的业务需求,实现算法的动态拓扑及多元服务自适应。仿真结果表明,所提路由算法有效降低了平均端到端时延及丢包率,且在业务满意度方面有明显提升。The satellite network is the key to building a wide-coverage,giant-connection,omni-directional and highly reliable space-ground integrated information network.Aiming at the problems of complex satellite network structure and diversified service requirements,a multi-service routing algorithm for the software-defined satellite network based on topology perception is proposed.To realize flexible and adaptive control,the software-defined satellite network architecture with satellite-ground coordination is constructed.In the two-layer centralized control plane,the high-orbit satellite centrally senses the topology information on the satellite network in the data plane,and is responsible for extracting the node and link attributes to portray the reliability of the inter-satellite links,on the basis of which a topology-aware multi-service on-demand routing algorithm is designed by constructing a topology-aware model,portraying dynamic link attributes,and constructing a multi-service on-demand routing model.For the three types of services,namely delay,bandwidth,and reliability-sensitive services,the K shortest path is selected as the solution space.The link resources are reasonably allocated by combining the path reliability perception with the demand preferences of the services to realize the dynamic topology and the multi-service adaption.Simulation results show that the proposed routing algorithm effectively reduces the end-to-end delay and packet loss ratio,and significantly improves service satisfaction.

关 键 词：软件定义网络 卫星网络 拓扑感知 多业务路由 可靠性 

分 类 号：TN92[电子电信—通信与信息系统]