A rate control mechanism for energy efficient many-to-one communication

  • Authors:
  • Vartika Bhandari;Nitin H. Vaidya

  • Affiliations:
  • University of Illinois at Urbana-Champaign;University of Illinois at Urbana-Champaign

  • Venue:
  • ACM SIGMOBILE Mobile Computing and Communications Review
  • Year:
  • 2005

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Abstract

The many-to-one communication paradigm is extremely relevant in the emerging contexts of hybrid wireless networks as well as data gathering sensor networks. In this model of communication the point of data-convergence (base-station) becomes a bottleneck, thereby imposing a trivial upper bound of W on achievable aggregate capacity [1] where W is the maximum transmission rate possible. Some earlier work on many-to-one communication has considered hierarchical schemes wherein nodes are organized into clusters and intra-cluster communication occurs over a different channel than cluster-head to base-station (BS) communication [1], [2]. However we observe that even within the constraint of a single channel, it is possible to harness the potential for spatial re-use available in the network to obtain greater energy-efficiency while maintaining the same aggregate rate. We envisage a mechanism that exploits the non-linearity inherent in Shannon's equation: W = B log (1 + SINR), and improves on energy consumption by replacing a single high rate transmission with many spatially spread out low rate ones.