Routing guaranteed quality of service connections in integrated services packet networks

  • Authors:
  • Wei Zhao;S. K. Tripathi

  • Affiliations:
  • -;-

  • Venue:
  • ICNP '97 Proceedings of the 1997 International Conference on Network Protocols (ICNP '97)
  • Year:
  • 1997

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Abstract

A critical functional component of quality-of-service (QoS) deployment in packet-switched networks is QoS-based routing. In this paper, we present a routing solution for guaranteed quality-of-service connections in integrated services packet networks (ISPN)-the future QoS-capable Internet proposed by the IETF. The problem is in essence a path finding problem with both end-to-end delay and per-node buffer constraints, in networks with heterogeneous intermediate switching nodes. We present a polynomial time algorithm using a capacity plane decomposition technique combined with a per-node constrained shortest path algorithm. We further propose an efficient route computation architecture, based on a novel metric-separation approach, to a slightly restricted version of the problem. The strategy is somewhat similar to "route caching", but in a new and broader sense.