基于随机网络演算的天地一体化网络性能分析  

Performance Analysis of Integrated Space-Ground Network Based on Stochastic Network Calculus

作　　者：魏德宾[1,2] 任桂平 杨力 WEI De-bin;REN Gui-ping;YANG Li(Communication and Network Laboratory,Dalian University,Dalian Liaoning 116600,China;School of Automation,Nanjing University of Science and Technology,Nanjing Jiangsu 210094,China)

机构地区：[1]大连大学信息工程学院,辽宁大连116600 [2]南京理工大学自动化学院,江苏南京210094

出　　处：《计算机仿真》2024年第11期416-421,共6页Computer Simulation

基　　金：国家自然科学基金(U21B2003,61931004)。

摘　　要：针对天地一体化网络中流量具有长相关性和链路信号衰减复杂的特点,采用矩母函数形式的随机网络演算作为研究工具,将天地一体化网络映射为一个串联排队模型。通过构造自相似流量的聚合随机到达曲线和吉尔伯特信道的随机服务曲线,对基于自相似流的天地一体化网络端到端的性能边界进行评估。研究还通过数值分析探究了违约概率、服务速率、Hurst参数等因素对天地一体化网络端到端性能边界的影响。以上研究结果为天地一体化网络的流量控制和缓存管理提供了指导,有助于进一步的性能优化。This paper addresses the challenges of analyzing the performance of the integrated space-ground net-work due to the long-range correlation of traffic and complex signal attenuation of space links.We employed the random network calculus in the form of moment generating functions as a research tool to map the integrated space-ground network to a tandem queuing model.By constructing the aggregate random arrival curve of self-similar traffic and the random service curve of Gilbert's channel,we evaluated the performance boundary of end-to-end integrated space-ground network based on self-similar traffic.The study also explored the impact of factors such as default probability,service rate,and Hurst parameter on the end-to-end performance boundary of the integrated network through numerical analysis.The results of this paper provide guidance for the traffic control and buffer management of the space-ground integrated network,which is helpful for further performance optimization.

关 键 词：随机网络演算 天地一体化网络 自相似流量 吉尔伯特信道 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]