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Multiple gateway placement in large‐scale constellation networks with inter‐satellite links
International Journal of Satellite Communications and Networking ( IF 0.9 ) Pub Date : 2020-07-13 , DOI: 10.1002/sat.1353 Quan Chen 1 , Lei Yang 1 , Xianfeng Liu 1 , Jianming Guo 1 , Shuai Wu 1 , Xiaoqian Chen 2
International Journal of Satellite Communications and Networking ( IF 0.9 ) Pub Date : 2020-07-13 , DOI: 10.1002/sat.1353 Quan Chen 1 , Lei Yang 1 , Xianfeng Liu 1 , Jianming Guo 1 , Shuai Wu 1 , Xiaoqian Chen 2
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Multiple gateways are required in large satellite constellation networks (LSCNs) with inter‐satellite links (ISLs), and their placement may greatly affect the system performance. Gateway placement can be optimized to achieve better network performance under the non‐uniform ground demand distribution. This paper formulates a gateway placement optimization model for LSCN with ISLs, aiming at achieving an optimal overall performance including delay, traffic peak, and load balance. The constraints of potential gateway location, gateway‐satellite connectivity, and max hop‐count are considered. A genetic algorithm (GA)‐based method is proposed to solve the integer optimization problem with the help of quasi‐evenly distributed reference layout. A Starlink‐like constellation with ISLs is adopted in the simulation. The simulation results show that the optimized layout has better performance than the reference layout. Additionally, the locations with high user demand or at the middle of ocean are preferred by gateways. The network performance is jointly influenced by gateway placement, demand distribution, constellation configuration, node, and link capacities. The abnormally high ISL hop‐count is found in the south Indian Ocean, which is caused by constellation and ISL configuration.
中文翻译：
具有星际链路的大型星座网络中的多个网关放置
具有卫星间链路（ISL）的大型卫星星座网络（LSCN）需要多个网关，它们的位置可能会极大地影响系统性能。可以优化网关放置，以在不均匀的地面需求分配下实现更好的网络性能。本文针对具有ISL的LSCN制定了网关布局优化模型，旨在实现包括延迟，流量峰值和负载平衡在内的最佳总体性能。考虑了潜在网关位置，网关-卫星连接性和最大跳数的限制。提出了一种基于遗传算法（GA）的方法，借助准均匀分布的参考布局来解决整数优化问题。仿真中采用了带有ISL的类似Starlink的星座。仿真结果表明，优化布局的性能优于参考布局。另外，网关优先选择用户需求较高或位于海洋中部的位置。网络性能受网关放置，需求分配，星座配置，节点和链路容量共同影响。在印度洋南部发现异常高的ISL跳数，这是由星座和ISL配置引起的。
更新日期：2020-07-13
中文翻译：
具有星际链路的大型星座网络中的多个网关放置
具有卫星间链路（ISL）的大型卫星星座网络（LSCN）需要多个网关，它们的位置可能会极大地影响系统性能。可以优化网关放置，以在不均匀的地面需求分配下实现更好的网络性能。本文针对具有ISL的LSCN制定了网关布局优化模型，旨在实现包括延迟，流量峰值和负载平衡在内的最佳总体性能。考虑了潜在网关位置，网关-卫星连接性和最大跳数的限制。提出了一种基于遗传算法（GA）的方法，借助准均匀分布的参考布局来解决整数优化问题。仿真中采用了带有ISL的类似Starlink的星座。仿真结果表明，优化布局的性能优于参考布局。另外，网关优先选择用户需求较高或位于海洋中部的位置。网络性能受网关放置，需求分配，星座配置，节点和链路容量共同影响。在印度洋南部发现异常高的ISL跳数，这是由星座和ISL配置引起的。
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