基於省電的低軌衛星網路路由演算法;An Energy-Efficient Routing Algorithm for LEO Satellite Networks

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题名:	基於省電的低軌衛星網路路由演算法;An Energy-Efficient Routing Algorithm for LEO Satellite Networks
作者:	邵惟民;Shao, Wei-Min
贡献者:	資訊工程學系
关键词:	衛星;路由;低軌衛星;軌道;電池;Satellites;Routing;Low earth orbit satellites;Orbits;Batteries
日期:	2022-08-16
上传时间:	2022-10-04 12:05:49 (UTC+8)
出版者:	國立中央大學
摘要:	衛星通訊可以無視地理限制並為地球上的任何地方提供服務的特性使得它變得越來越受歡迎。衛星軌道的周期可以分為日光期和日蝕期。日蝕期間，衛星無法被太陽照射，其電池是唯一的電力來源。若是無節制地使用能源將導致衛星電池快速老化，因為電池的充放電的次數是有限的。開發能夠延長衛星電池壽命的路由也因此變得非常重要。現今雖有許多研究在探討衛星路由，但他們有些需要足夠的地面站來計算和傳輸路由表（即集中式路由方案），而有些則只專注於尋找最短路徑。地球與LEO 衛星的相對位置具有規律性，利用這一特性，我們提出了一個動態、且無需地面站的路由演算法。結果表明，我們可以防止過高的電池放電深度而且，相較於其他的我們比較的方法。我們能達到更加均衡的負載平衡且只增加了微量的路徑長度。;Satellite communication could ignore geographic restrictions and provide services to everywhere on earth which makes it become more and more popular overtime. The period of a satellite orbit can be divided into sunlight period and eclipse period. In eclipse period, satellite could not be irradiated by the sun and its battery is the only power supply. Unrestrained use of energy will cause a satellite to age quickly since the number of charge/discharge of battery cells are limited. The development of energy-efficient satellite routing to save energy and prolong satellite lifetimes has become significantly important. Many of the existing approache either need sufficient ground stations to compute and transmit the routing table (i.e. centralized routing scheme) frequently or focus on finding a shortest path. The relative location of earth and a LEO satellite has a regularity, by taking advantage of this feature, we proposed a dynamic routing scheme with no need for the ground station to calculate the routes. The result showed that we could prevent batteries from a high depth of discharge campared with the shortest path algorithm. Moreover, with a guarantee of load balancing and a little increment of path length.
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