When both transmitting and receiving energies matter: an application of network coding in wireless body area networks

  • Authors:
  • Xiaomeng Shi;Muriel Médard;Daniel E. Lucani

  • Affiliations:
  • Massachusetts Institute of Technology, Cambridge, MA;Massachusetts Institute of Technology, Cambridge, MA;Instituto de Telecomunicações, DEEC, Faculdade de Engenharia, Universidade do Porto, Portugal

  • Venue:
  • NETWORKING'11 Proceedings of the IFIP TC 6th international conference on Networking
  • Year:
  • 2011

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Abstract

A network coding scheme for practical implementations of wireless body area networks is presented, with the objective of providing reliability under low-energy constraints. We propose a simple network layer protocol for star networks, adapting redundancy based on both transmission and reception energies for data and control packets, as well as channel conditions. Our numerical results show that even for small networks, the amount of energy reduction achievable can range from 29% to 87%, as the receiving energy per control packet increases from equal to much larger than the transmitting energy per data packet. The achievable gains increase as a) more nodes are added to the network, and/or b) the channels seen by different sensor nodes become more asymmetric.