Backhaul-aware energy efficient heterogeneous networks with dual connectivity

Abstract

In this paper, we consider backhaul-aware mechanisms for energy efficient operation of next generation heterogeneous wireless networks, with dense small cell deployments. We assume control and data plane separation based on the LTE-Advanced dual connectivity architecture. The mechanisms are evaluated using LTE-Advanced heterogeneous network scenarios, with varying levels of network densities, user traffic and cell load conditions. For comparison, conventional traffic offloading schemes based on small cell proximity and load are also evaluated. The performance results indicate significant energy saving (ES) gains for the backhaul-aware mechanism, depending on the backhaul technology used. Evaluations were also done on the impacts of user mobility, and for indoor and outdoor deployments of small cells. Trade-offs between user throughput and energy efficiency are evaluated, and using the considered mechanism, ES gains of up to 20 % is observed, without significant loss in throughput.

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Acknowledgments

Parts of the research leading to these results has received funding from the European Community’s Seventh Framework Program FP7 / 2007 - 2013 under Grant agreement No. 317941 - Project iJOIN. The European Union and its agencies are not liable or otherwise responsible for the contents of this document; its content reflects the view of its authors only.

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Correspondence to Athul Prasad.

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A. Prasad was with NEC Laboratories Europe when this article was written.

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Prasad, A., Maeder, A. Backhaul-aware energy efficient heterogeneous networks with dual connectivity. Telecommun Syst 59, 25–41 (2015). https://doi.org/10.1007/s11235-014-9893-4

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Keywords

  • Energy efficiency
  • Heterogeneous networks
  • Green wireless networks
  • LTE-advanced
  • Dual connectivity
  • Inter-eNB carrier aggregation