Energy-Efficient Mode Switching Mechanism With Flexible Functional Splitting in Energy Harvesting Cloud Radio Access Networks

IEEE Access

Sangheon Pack¹  Haneul Ko² 

[1] School of Electrical Engineering, Korea University, Seoul, South Korea;Smart Quantum Communication Research Center, Korea University, Seoul, South Korea;

关键词: Energy harvesting;    renewable energy;    cloud radio access networks (C-RANs);    sleep mode;    functional splitting;    constraint Markov decision process (CMDP);   

DOI  :  10.1109/ACCESS.2018.2878244

来源: DOAJ

【 摘 要 】

In energy harvesting cloud radio access networks, the sleep mode switching of small radio remote head (SRRH) and the functional splitting between SRRH and baseband unit are two important challenges for improving energy efficiency and throughput. In this paper, we propose an energy-efficient mode switching mechanism (E²MSM) with flexible functional splitting in which a controller determines the modes of SRRHs and functional splitting level by considering the renewable energy levels and populations of SRRHs. To optimize the performance of E²MSM, a constraint Markov decision process problem is formulated and a joint optimal policy on the sleep scheduling and the functional splitting level is obtained by a linear programming. Evaluation results demonstrate that E²MSM with the optimal policy can achieve comparable throughput to the throughput-oriented scheme while consuming no non-renewable energy.

【 授权许可】

Unknown