Distributed adaptive diverse routing for voice-over-IP in service overlay networks

被引:5
|
作者
Li, Hong [1 ]
Mason, Lorne [1 ]
Rabbat, Michael [1 ]
机构
[1] McGill University, Electrical and Computer Engineering Department, Montreal, Canada
关键词
Back-bone network - Distributed learning automaton - Diverse routing - Link failure detection - Scalable methods - Secondary paths - Service overlay networks - Voice over IP;
D O I
10.1109/TNSM.2009.03.090304
中图分类号
学科分类号
摘要
This paper proposes a novel mechanism to discover delay-optimal diverse paths using distributed learning automata for Voice-over-IP (VoIP) routing in service overlay networks. In addition, a novel link failure detection method is proposed for detecting and recovering from link failures to reduce the number of dropped voice sessions. The main contributions of this paper are a decentralized, scalable method for minimizing delay on both a primary and secondary path between all pairs of overlay nodes, while at the same time maintaining the link disjointness between the primary and the secondary optimal paths. Simulations of a 50-node model of AT&T's backbone network show that the proposed method improves the quality of voice calls from unsatisfactory to satisfactory, as measured by the R-factor. With the proposed link failure detection mechanism, the time to recover from a link failure is considerably reduced. © 2009 IEEE.
引用
收藏
页码:175 / 189
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