End-to-End Vs. Hop-by-Hop Transport Under Intermittent Connectivity (Invited Paper)

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Executive Summary

This paper revisits the fundamental trade-off between end-to-end and hop-by-hop transport control. The end-to-end principle has been one of the building blocks of the Internet; but in real-world wireless scenarios, end-to-end connectivity is often intermittent, limiting the performance of end-to-end transport protocols. The authors use a stochastic model that captures both the availability ratio of links and the duration of link disruptions to represent intermittent connectivity. They compare the performance of end-to-end and hop-by-hop transport over an intermittently-connected path. End-to-end, perhaps surprisingly, may perform better than hop-by-hop transport under long disruption periods.

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