Algebra and algorithms for QoS path computation and hop-by-hop routing in the internet.

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Presentation transcript:

Algebra and algorithms for QoS path computation and hop-by-hop routing in the internet

Outline Introduction and Contribution An algebra for QoS path problems QoS path computation QoS Hop-by-hop routing QoS Multirouting

Introduction Shortest path routing: Dijkstra’s Algorithm Hop-by-hop routing: local, depending on destination only For QoS, both have limitations Contribution 1) Revise Dijkstra’s algorithm 2) Eliminate loop in hop-by-hop routing

An algebra for QoS path problems

Notations

QoS path computation Lexicographic-lightest path

S-lightest path

A generalized Dijkstra’s Algorithm

QoS Hop-by-hop routing Nonoptimality When Isotonicity Fails

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