Journal of Astronautics ›› 2012, Vol. 33 ›› Issue (6): 746-753.doi: 10.3873/j.issn.1000-1328.2012.06.009

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Load Balanced Routing Protocol for Double-Layered Satellite Networks

CHEN Jian-zhou1,2, WANG Lu1,2, LIU Li-xiang1, HU Xiao-hui1   

  1. 1. Science and Technology on Integrated Information System Laboratory, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-07-14 Revised:2011-10-16 Online:2012-06-15 Published:2012-06-20

Abstract: A load balanced routing protocol named LBRD is proposed for double-layered satellite networks. Unlike conventional hierarchical routing protocols, LBRD uses independent geographic routing within the same layer and takes another layer as a complement in case of route failure. To alleviate uneven traffic distribution, neighbor load notification for a single congested node is adopted, while a district load balanced scheme for the overloaded area formed by several nodes is introduced. Routing paths would detour heavily-loaded districts by transforming distance between nodes, accelerating load recovery of those districts. Simulation results show that this protocol yields a more balanced distribution of traffic over the constellation and brings down packet drop rate and queuing delay due to congestion, guaranteeing network throughput.

Key words: Double-layered satellite networks, geoGraphic route, Load balance, Distance transform