Making Greed Work in Networks : A Game - Theoretic Analysis of Switch Service Disciplines 1

This paper discusses congestion control from a game-theoretic perspective. There are two basic premises: (1) users are assumed to be independent and sellsh, and (2) central administrative control is exercised only at the network switches. The operating points resulting from sellsh user behavior depend crucially on the service disciplines implemented in network switches. This eeect is investigated in a simple model consisting of a single exponential server shared by many Poisson sources. We discuss the extent to which one can guarantee, through the choice of switch service disciplines, that these sellsh operating points will be eecient and fair. We also discuss to what extent the choice of switch service disciplines can ensure that these sellsh operating points are unique and are easily and rapidly accessible by simple self-optimization techniques. We show that no service discipline can guarantee optimal eeciency. As for the other properties, we show that the traditional FIFO service discipline guarantees none of these properties, but that a service discipline called Fair Share guarantees all of them. While the treatment utilizes game-theoretic concepts, no previous knowledge of game theory is assumed.