Energy Consume Analysis for Ring-Topology TWDM-PON Front-Haul Enabled Cloud RAN

Cloud radio access network (C-RAN) is a new architecture to meet the ever increasing internet data traffic. In particular, the operating expense (OPEX), mainly the energy consumption, of C-RAN is an issue of common concern. Several former works in this area lacked the essential consideration for the...

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Bibliographic Details
Published in:Journal of lightwave technology 2017-10, Vol.35 (20), p.4526-4534
Main Authors: Tan, Zhongwei, Yang, Chuanchuan, Wang, Ziyu
Format: Article
Language:English
Subjects:
C-RAN
Cloud computing
Computer architecture
energy analysis
Energy consumption
Energy efficiency
optical front-haul
Optical network units
Passive optical networks
Queueing analysis
queueing theory
ring-topology TWDM-PON
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Summary:Cloud radio access network (C-RAN) is a new architecture to meet the ever increasing internet data traffic. In particular, the operating expense (OPEX), mainly the energy consumption, of C-RAN is an issue of common concern. Several former works in this area lacked the essential consideration for the optical front-haul part, as a result that it cannot provide overall energy consumption study for the whole system. In this paper, we analyze the energy consume problem in a new C-RAN architecture, i.e., the ring-topology time-wavelength division multiplexing (TWDM) passive optical network (PON) front-haul enabled C-RAN, considering the requirements for large transmission capacity, high energy efficiency, and the appropriate utilization in the large-scale and densely populated cities. After bringing in this optical front-haul and considering the quality of service, a network traffic modeling is provided to analyze the energy problem based on queueing theory. We also conduct the network optimization to ensure that the system works in the most energy-efficient state. Besides, the energy comparisons among the ring-topology TWDM-PON front-haul enabled C-RAN, the time division multiplexing (TDM) PON enabled C-RAN and the ring-topology TWDM-PON-LTE architecture have also been made. According to the numerical results, the new C-RAN, after energy optimization, can save up to 58.1% energy compared with the TWDM-PON-LTE architecture, and also has a slight advantage over the TDM-PON enabled C-RAN (saving more than 2% energy), demonstrating its broad application prospects and large potential in the future.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2017.2745998