以信息为中心的天地一体化网络分域路由机制研究  

Area-divided-based inter-satellite routing mechanism for space-ground integrated network based on ICN

作　　者：段洁 李朝江 刘浩[1] 闫子豪 程慰丹 DUAN Jie;LI Chaojiang;LIU Hao;YAN Zihao;CHENG Weidan(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China;Optical Communication and Network Key Laboratory of Chongqing,Chongqing 400065,P.R.China;Sichuan Yi Jing Intelligent Terminal Co.LTD,Yibin 644000,P.R.China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆市光通信与网络高校重点实验室,重庆400065 [3]四川易景智能终端有限公司,四川宜宾644000

出　　处：《重庆邮电大学学报（自然科学版）》2024年第5期847-858,共12页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金资助项目(62171070,61701058);四川省科技计划项目(2022YFG0056);重庆市教委科学技术研究项目(KJQN202200615);宜宾市引进高层人才项目(2022YG05)。

摘　　要：针对现有星间路由策略难以实现天地一体化网络(space-ground integrated information-centric network,SGI 2CN)中卫星拓扑高动态变化情况下多源内容高效传输的问题,提出面向多源内容的分域星间路由机制(area-divided-based inter-satellite routing mechanism,ADISR)。根据给定区域划分原则,构建基于虚拟节点的卫星网络模型。对于域内路由,根据内容源位置和缓存更新,采用基于链路状态最短路径算法和状态更新算法实现域内动态路由;对于域间路由,通过综合考虑节点和链路状态提出基于辅助图的启发式算法实现跨域数据传输。仿真结果表明,与已有路由机制相比,ADISR能解决SGI 2CN中多源多路径问题,减少网络丢包率,降低内容传播时延,提高网络吞吐量。Because of the highly dynamic topology in the space-ground integrated information-centric network(SGI 2CN),it is difficult to transmit content efficiently for the content-share paradigm.The area-divided-based inter-satellite routing(ADISR)mechanism is proposed to meet the multi-source content-share demand in SGI 2CN.According to the given region division principle,a virtual node-based model is constructed for the SGI 2CN.For intra-domain routing,dynamic routing is achieved using a link-state shortest path algorithm and state update algorithm,based on the content source location and cache updates.For inter-domain routing,a heuristic algorithm based on an auxiliary graph is proposed to enable cross-domain data transmission by considering the status of both nodes and links.Simulation results demonstrate that ADISR resolves the multi-source multi-path problem in SGI 2CN,reducing packet loss rate,lowering content transmission delay,and increasing network throughput compared to existing routing mechanisms.

关 键 词：信息为中心的天体一体化网络 分域的星间路由机制 虚拟节点 域内路由 域间路由 

分 类 号：TN929[电子电信—通信与信息系统]