Balancing distance and lifetime in delay constrained ad hoc networks

  • Authors:
  • Ben Liang;Min Dong

  • Affiliations:
  • University of Toronto, Toronto, Ontario, Canada;QUALCOMM, Inc. San Diego, California, USA

  • Venue:
  • Proceedings of the 7th ACM international symposium on Mobile ad hoc networking and computing
  • Year:
  • 2006

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Abstract

This paper addresses the problem of optimizing the packet transmission schedule in an ad hoc network with end-to-end delay constraints. The emphasis is to determine the proper relative weights assigned to the remaining distance and the remaining lifetime in order to rank the urgency of a packet. We consider a general class of transmission schemes that represent such relative weights using a single lifetime-distance factor, which includes, as special cases, schedules such as Earliest-Deadline-First and Largest-Distance-First. We propose an analytical framework, based on recursive non-homogeneous Markovian analysis, to study the effect of the lifetime-distance factor on packet loss probability in a general multihop environment, with different configurations of peer-node channel contention. Numerical results are presented to demonstrate how various network parameters affect the optimal lifetime-distance factor. We demonstrate quantitatively how the proper balance between distance and lifetime in a transmission schedule can significantly improve the network performance, even under imperfect schedule implementation.