Towards an end-to-end delay analysis of LEO satellite networks for seamless ubiquitous access

• 作 者: CHEN JianZhou LIU LiXiang HU XiaoHui
• 机 构: Science and Technology on Integrated Information System Laboratory,Institute of Software,Chinese Aca
• 出 处: Science China(Information Sciences)
• 发表日期: 2013年11期
• 关键词: seamless ubiquitous routing topology queue connectivity users requirement satisf

LEO satellite networks,with moderate propagation delay and low terminal power requirement,are considered as a promising solution to providing global seamless access services for ubiquitous computing.In order to satisfy the requirement of accessing computing resource for users,end-to-end delays should be bounded for a continual and reliable connectivity.But given dynamic topology and non-uniform distribution of terrestrial users,end-to-end delays within LEO satellite networks are liable to fluctuate.Hence,to examine the delay constraint,an analytical model based on a tandem queue is established under a hot-spot trafc pattern,which is unfavorable for bounded delays.The departure interval moments of a target flow are calculated and ftted for the next link as input parameters,from which queuing delays under cross flows are iteratively obtained.The analytical results show that this model is able to depict the influence by the trafc pattern with satisfying accuracy,which is valuable for the design of routing schemes in satellite networks.

LEO satellite networks, with moderate propagation delay and low terminal power requirement, are considered as a promising solution to providing global seamless access services for ubiquitous computing.In order to satisfy the requirement of accessing computing resource for users, end-to-end delays should be bounded for a continual and reliable connectivity.But given dynamic topology and non-uniform distribution of terrestrial users, end-to-end delays within LEO satellite networks are liable to fluctuate .ence to examine the delay constraint, an analytical model based on a tandem queue is established under a hot-spot trafc pattern, which is unfavorable for bounded delays. The departure interval moments of a target flow are calculated and ftted for the next link as input parameters, from which queuing delays under cross flows are iteratively obtained The analytical results show that this model is able to depict the influence by the trafc pattern with satisfying accuracy, which is valuable for the design of routing schemes in satellite networks.