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Energy-Efficient Uncoordinated Cooperative MAC with Uncertain Relay Distribution Intensity

  • Wei Song
  • Peijian Ju
  • A-Long Jin
Chapter
  • 356 Downloads
Part of the Wireless Networks book series (WN)

Abstract

As a promising technique, cooperative communications make use of the broadcasting nature of wireless medium to facilitate data transmission, and thereby reduce energy consumption. However, in many studies on wireless cooperative diversity, it is often assumed that the number of relays or the relay distribution intensity is known a priori. In this chapter, we relax such assumption and propose an algorithm to estimate the relay intensity for a backoff-based cooperative scheme, where the relays are distributed as a homogeneous Poisson point process (PPP). It is proved that the algorithm can converge to an optimal solution with the minimum estimation error. Based on the estimated relay intensity, we further investigate a distributed energy saving strategy, which selectively turns off some relays to reduce energy consumption while maintaining the required transmission success probability. The performance of the proposed cooperative scheme is analytically evaluated with respect to the collision probability. The numerical and simulation results demonstrate the high accuracy and efficiency of the intensity estimation algorithm and also validate the theoretical analysis. Moreover, the proposed cooperative scheme exhibits significant energy saving and satisfactory transmission performance, which offers a good match to accommodate green communications in wireless networks.

Keywords

Successful Transmission Probability Energy Saving Strategy Collision Probability Homogeneous PPP Potential Relay 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Wei Song
    • 1
  • Peijian Ju
    • 2
  • A-Long Jin
    • 3
  1. 1.Faculty of Computer ScienceUniversity of New BrunswickFrederictonCanada
  2. 2.IBM CanadaFrederictonCanada
  3. 3.University of WaterlooWaterlooCanada

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