New methods for shortest path selection for multimedia traffic with two delay constraints

  • Authors:
  • A.L Roginsky;K.J Christensen;V Srinivasan

  • Affiliations:
  • Networking Division, International Business Machines Corporation, Research Triangle Park, NC 27709, USA;Department of Computer Science and Engineering, University of South Florida, 4202 East Fowler Avenue, ENB 118, Tampa, FL 33620, USA;Networking Division, International Business Machines Corporation, Research Triangle Park, NC 27709, USA

  • Venue:
  • Computer Communications
  • Year:
  • 1999

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Abstract

Path selection based on two criteria, propagation delay and maximum delay jitter, is often a requirement in high-speed networks carrying multimedia traffic. Shortest path selection with multiple additive or multiplicative criteria is a NP-complete problem. Simply adding propagation and jitter delay bounds into a single delay criterion is shown to eliminate from consideration a large number of otherwise acceptable path choices. In this paper, four new solutions for polynomial-time, two-criteria path selection are presented. The first solution is a two-pass modified Bellman-Ford algorithm. The other solutions are based on a weighted single-criterion path search and are described via a novel geometric construction of the path selection problem. The new solutions are mathematically proved and their effectiveness demonstrated with a simulation experiment. Applications of the new solutions to ATM PNNI and IP routing are described.