NetLets: measurement-based routing daemons for low end-to-end delays over networks

Routing in the Internet is based on the best-effort mechanism, wherein the routers generally forward packets to minimize the number of hops to the destination. Furthermore, all packets of a type are treated the same independent of their size. We propose the framework of NetLets to enable the applica...

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Bibliographic Details
Published in:Computer communications 2003-05, Vol.26 (8), p.834-844
Main Authors: Rao, Nageswara S.V., Bang, Young-Cheol, Radhakrishnan, Sridhar, Wu, Qishi, Sitharama Iyengar, S., Choo, Hyunseung
Format: Article
Language:English
Subjects:
End-to-end delays
Evaluation
NetLets
Network instrumentation and measurements
Networks
Performance evaluation
Performance measures
Quality of service
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Summary:Routing in the Internet is based on the best-effort mechanism, wherein the routers generally forward packets to minimize the number of hops to the destination. Furthermore, all packets of a type are treated the same independent of their size. We propose the framework of NetLets to enable the applications to send data packets to the destination with certain guarantees on the end-to-end delay. NetLets employ in situ instruments to measure the effective bandwidth and propagation delays on the links, and compute the paths with minimum measured end-to-end delay for data packets of various sizes. Based on experiments over local area networks, the paths selected by NetLets indeed achieve the minimum end-to-end delay, and our method outperformed the best-effort mechanism based on the hop count. We also describe an implementation of NetLets over the Internet to illustrate their viability for wide-area networks.
ISSN:0140-3664
1873-703X
DOI:10.1016/S0140-3664(02)00217-7