A new scaling law on throughput and delay performance of wireless mobile relay networks over parallel fading channels

  • Authors:
  • Rui Wang;Vincent K. N. Lau;Kaibin Huang

  • Affiliations:
  • Department of Electronic & Computer Engineering, Hong Kong University of Science & Technology;Department of Electronic & Computer Engineering, Hong Kong University of Science & Technology;Department of Electronic & Computer Engineering, Hong Kong University of Science & Technology

  • Venue:
  • ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
  • Year:
  • 2009

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Abstract

In this paper, utilizing the relay buffers, we propose an opportunistic decode-wait-and-forward relay scheme for a point-to-point communication system with a half-duplexing mobile relay network. The proposed scheme achieves the maximum throughput of Θ(log K) at a cost of O(1) total transmission power and O(K/q) average end-to-end packet delay, where O q ≤ 1/2 measures the speed of relays' mobility. It can be proved that this system throughput is unattainable for the existing designs with low relay mobility. Therefore, the proposed relay scheme can exploit the time diversity and relays' mobility more efficiently.