Mobile IPv6 における複数Home Agent の配置法における検討

摘要

Mobile IPv6 の一点障害性や冗長経路問題に対処するため，Global HA-HA によって複数のHA を設置し，問題の改善を図る.AS レベルトポロジーにおいて，運用上　どのようにHA を分散配置すればよいのか，2008年5月に発表したものを詳細に検討し直した.その結果，中位や下位のISP はbetweenness が上位のASに2台目のHA を置くとホップ数やコストの点では改善されるが，上位のAS に負荷が集中してしまうことがわかった.上位のISP は上位のASに2台目のHA を設置するとコストの低下や負荷分散に効果的であることがわかった.%This paper investigates efficient placement of multiple HA of Mobile IPv6 in an AS level topology by examining the results of our paper in May 2008. As a result, in case of an AS with middle or low betweenness, it would be good to place the 2nd HA in an AS with high betweenness in terms of hop count and path cost, however, communication cost concentrates on the AS with high betweenness. In case of an AS with middle or low betweenness, it would be better to place the 2nd HA in an AS with high betweenness in terms of path cost and dispersion of communication cost.