21 May 2013 An efficient QoS-aware routing algorithm for LEO polar constellations
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Abstract
In this work, a Quality of Service (QoS)-aware routing (QAR) algorithm is developed for Low-Earth Orbit (LEO) polar constellations. LEO polar orbits are the only type of satellite constellations where inter-plane inter-satellite links (ISLs) are implemented in real world. The QAR algorithm exploits features of the topology of the LEO satellite constellation, which makes it more efficient than general shortest path routing algorithms such as Dijkstra’s or extended Bellman-Ford algorithms. Traffic density, priority, and error QoS requirements on communication delays can be easily incorporated into the QAR algorithm through satellite distances. The QAR algorithm also supports efficient load balancing in the satellite network by utilizing the multiple paths from the source satellite to the destination satellite, and effectively lowers the rate of network congestion. The QAR algorithm supports a novel robust routing scheme in LEO polar constellation, which is able to significantly reduce the impact of inter-satellite link (ISL) congestions on QoS in terms of communication delay and jitter.
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Xin Tian, Khanh Pham, Erik Blasch, Zhi Tian, Dan Shen, Genshe Chen, "An efficient QoS-aware routing algorithm for LEO polar constellations", Proc. SPIE 8739, Sensors and Systems for Space Applications VI, 87390O (21 May 2013); doi: 10.1117/12.2015203; https://doi.org/10.1117/12.2015203
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