On the impact of D2D traffic offloading on energy efficiency in green LTE-A HetNets
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Communication Theory Lab
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AbstractIn this paper, the interplay between cooperative device-to-device (D2D) communications and green cellular communications in the long term evolution (LTE) and LTE-advanced (LTE-A) cellular systems is investigated. An efficient approach for grouping mobile terminals (MTs) into cooperative clusters is described. In each cluster, MTs cooperate via D2D communications to share content of common interest. In addition, an energy-efficient approach for putting base stations in sleep mode in an LTE-A heterogeneous network is presented. Finally, both methods are combined in order to ensure green communications for both the users' MTs and the operator's base stations. The presented techniques are investigated in the framework of orthogonal frequency division multiple access-based state-of-the-art LTE cellular networks, while taking resource allocation and intercell interference into account. Results show that the proposed approach leads to energy savings for both the operator and the MTs, while leading to enhanced quality of service for mobile users. Copyright © 2014 John Wiley & Sons, Ltd.
SponsorsThe authors would like to thank the anonymous reviewers and the editor for their comments that contributed to significantly enhancing the quality and clarity of this paper. This work was made possible by NPRP with grant# 4-353-2-130 from the Qatar National Research Fund (a member of The Qatar Foundation). The statements made herein are solely the responsibility of the authors. Part of this work was published in E. Yaacoub, H. Ghazzai, M.-S. Alouini, and A. Abu-Dayya, 'Achieving Energy Efficiency in LTE with Joint D2D Communications and Green Networking Techniques', IEEE International Wireless Communications, and Mobile Computing Conference (IWCMC 2013), Cagliari, Sardinia, Italy, July 2013.