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

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

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

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

  2. Outline • Introduction and Contribution • An algebra for QoS path problems • QoS path computation • QoS Hop-by-hop routing • QoSMultirouting

  3. 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

  4. An algebra for QoS path problems

  5. Notations

  6. QoS path computation • Lexicographic-lightest path

  7. S-lightest path

  8. A generalized Dijkstra’s Algorithm

  9. QoS Hop-by-hop routing • Nonoptimality When Isotonicity Fails

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