Green Resource Allocation to Minimize Receiving Energy in OFDMA Cellular Systems

被引:35
作者
Chu, Feng-Seng [1 ]
Chen, Kwang-Cheng [1 ,2 ]
Fettweis, Gerhard [3 ]
机构
[1] Natl Taiwan Univ, Grad Inst Commun Engn, Taipei, Taiwan
[2] Natl Taiwan Univ, Dept Elect Engn, Taipei, Taiwan
[3] Tech Univ Dresden, Dresden, Germany
关键词
Green; energy efficiency; resource sheduling;
D O I
10.1109/LCOMM.2012.010512.2339
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
Advanced cellular systems supporting ultra high traffic (e.g., 1 Gbps) utilize aggressive communication technologies to user equipment (UE) and thus induce high-energy consumption. To reduce UE energy consumption, we note that in OFDMA systems, transmissions to one UE can be scheduled into fewer time slots due to multiple available sub-carriers. It implies that the circuit energy of UEs can be reduced if turning off the circuits during the slots without receptions is allowed. A nonlinear integer resource optimization is thus formulated for base stations to minimize the receiving energy of UEs, with a proposed algorithm to reach optimal solution efficiently. Numerical results demonstrate that our computationally efficient algorithm can easily reduce more than 60% UE energy consumption, and thus is ready for practical systems such as 3GPP LTE/LTE-Advanced.
引用
收藏
页码:372 / 374
页数:3
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