Geographical and Orbital Information Based Mobility Management to Overcome Last-Hop Ambiguity over IP/LEO Satellite Networks

科研費報告書収録論文(課題番号:17500030/研究代表者:加藤寧/インターネットと高親和性を有する次世代低軌道衛星ネットワークに関する基盤研究

Geographical and Orbital Information Based Mobility Management to Overcome Last-Hop Ambiguity over IP/LEO Satellite Networks

Abstract-Low Earth Orbit (LEO) satellite networks are well characterized by frequent and bursty handover occurrences, and these handovers largely affect the cost of mobility management in LEO satellite networks. Although geographical location of a mobile node is useful information to make the mobility management independent from handovers, it is difficult to decide a last-hop satellite of the node based only on geographical location information. This last-hop ambiguity problem needs additional cost to find the real last-hop satellite. To reduce lasthop ambiguity, we propose to exploit orbital information of the satellite connected with a destination node in addition to geographical location information. Simulation results shows that the number of last-hop candidates and hop counts between candidates are reduced by introducing orbital information. Through a mathematical analysis, we evaluate the cost required for mobility management and show the effectiveness of the proposed method