We investigate transmission energy minimization via optimizing wireless relay selection in orthogonal-frequency-division multiple access (OFDMA) networks. We take into account the impact of the load of cells on transmission energy. We prove the NP-hardness of the energy-aware wireless relay selection problem. To tackle the computational complexity, a partial optimality condition is derived for providing insights in respect of designing an effective and efficient algorithm. Numerical results show that the resulting algorithm achieves high energy performance.
@article{arxiv.1610.00982,
title = {Energy-Aware Wireless Relay Selection in Load-Coupled OFDMA Cellular Networks},
author = {Lei You and Di Yuan and Nikolaos Pappas and Peter Värbrand},
journal= {arXiv preprint arXiv:1610.00982},
year = {2017}
}