Internet acess network infrastructures, such as cable, DSL, and cellular broadband networks, are being widely deployed. Yet, very little is known publicly about the characteristics of access network deployments in the real world. Consequently, researchers and application developers do not understand how well their systems or protocols perform over access networks. Even customers of access ISPs are often not aware of the details of their network deployments.
A large and rapidly growing fraction of users connect to the Internet via residential cable and DSL networks. However, little is known about the characteristics (e.g., bandwidths and queue sizes) of deployed residential broadband networks. In this project, we studied the characteristics of 2,000 DSL and cable links from 11 major ISPs in North America and Europe.
Monarch is a tool that accurately emulates transport protocol flows from an end host under the experimenter's control to any other end host that responds to simple TCP, UDP or ICMP packet probes. Since many Internet hosts and routers respond to such probes, Monarch can evaluate transport protocols such as TCP Vegas, TCP Nice, and PCP over a large and diverse set of Internet paths.
Krishna P. Gummadi
Stefan Saroiu, University of Toronto
Ivan Beschastnikh, University of Washington
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