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Multi-Modal Network Protocols: Adapting to Highly Variable Operating Conditions1

Summary: Multi-Modal Network Protocols: Adapting to
Highly Variable Operating Conditions1
Aditya Akella2
Ashwin Bharambe3
Suman Nath4
Srinivasan Seshan5
August 2002
School of Computer Science
Carnegie Mellon University
Pittsburgh, PA 15213
Most network protocols are uni-modal: they employ a single set of algorithms that allows them to cope well
only within a narrow range of operating conditions. This rigid design renders these protocols inefficient in
the face of widely varying operating environments or in conditions different from the ones for which they
are optimized. Such uni-modal protocols have great difficulty in the mobile computing world where the
operating conditions, including number of nodes, computational capabilities and rate of mobility, are not
Consider, for example, routing in a network of ad-hoc nodes. Solutions like DSDV work well when the
number of nodes is small. Unfortunately, such schemes scale poorly to larger population sizes. In such


Source: Akella, Aditya - Department of Computer Sciences, University of Wisconsin at Madison
Carnegie Mellon University, School of Computer Science


Collections: Computer Technologies and Information Sciences