通信学报2025，Vol.46Issue(4)：80-90,11.DOI:10.11959/j.issn.1000-436x.2025074
基于网络演算的LEO卫星网络时延上界分析研究
Research on delay upper bound analysis based on network calculus for LEO satellite network
摘要
Abstract
It's essential to achieve reliable transmission by accurately characterizing the delay upper bound in space-air-ground integrated network(SAGIN).Based on deterministic network calculus and time-aware shaping(TAS)mechanism in time-sensitive networking(TSN),a delay upper bound analysis model for low earth orbit(LEO)satellites was con-structed.Firstly,a delay upper bound guarantee architecture for LEO satellite network(DGA-LEO)was developed using network calculus within the context of SAGIN.Next,a traffic model was formulated based on leaky bucket model,con-sidering the worst-case impact of interference from different priorities,and then the service curve for a satellite node was established.For the same-priority interference,a new left-over service curve calculation method was proposed,and based on the convolution theory in min-plus algebra,an improved network calculus algorithm was developed.Finally,the proposed algorithm was tested under a defined LEO satellite network and traffic model,and the comparative analysis was conducted with three traditional algebraic network calculus algorithms.Experimental results demonstrate that the proposed algorithm achieves more accurate delay upper bounds while significantly reducing computation time.关键词
空天地一体化网络/时间敏感网络/确定性网络演算/时延上界分析Key words
space-air-ground integrated network/time-sensitive networking/deterministic network calculus/delay upper bound analysis分类
电子信息工程引用本文复制引用
王慧姊,孙雷,王健全,林尚静,王卓群,SUN Kewen..基于网络演算的LEO卫星网络时延上界分析研究[J].通信学报,2025,46(4):80-90,11.基金项目
北京市自然科学基金海淀原始创新联合基金资助项目(No.L232001) The Joint Research Fund for Beijing Natural Science Foundation and Haidian Original Innovation(No.L232001) （No.L232001）
