End-to-end vs. hop-by-hop transport

Authors:
Simon Heimlicher;Pavan Nuggehalli;Martin May
Affiliations:
Computer Engineering and Networks Laboratory, ETH Zurich, Switzerland;Indian Institute of Science, Bangalore, India;Computer Engineering and Networks Laboratory, ETH Zurich, Switzerland
Venue:
ACM SIGMETRICS Performance Evaluation Review
Year:
2007

Citing 2
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Abstract

The transport layer has been considered an end-to-end issue since the early days of the Internet in the 1980s [1], when the TCP/IP protocol suite was designed to connect networks of dedicated routers over wired links. However, over the last quarter of a century, network technology as well as the understanding of the Internet has changed, and today's wireless networks differ from the Internet in many aspects. Since wireless links are unreliable, it is often impossible to sustain an end-to-end connection to transmit data in wireless network scenarios. Even if an end-to-end path exists in the network topology for some fraction of the communication, it is likely to break due to signal propagation impairments, interference, or node mobility. Under these circumstances, the operation of an end-to-end transport protocol such as TCP may be severly affected.