Energy consume analysis for ring-topology TWDM-PON front-haul enabled cloud RAN

Zhongwei Tan, Chuanchuan Yang*, Ziyu Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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 TWDMPON front-haul enabled C-RAN, the time division multiplexing (TDM) PON enabled C-RAN and the ring-topology TWDM-PONLTE 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.

Original languageEnglish
Article number8017375
Pages (from-to)4526-4534
Number of pages9
JournalJournal of Lightwave Technology
Volume35
Issue number20
DOIs
Publication statusPublished - 15 Oct 2017
Externally publishedYes

Keywords

  • C-RAN
  • Energy analysis
  • Optical front-haul
  • Queueing theory
  • Ring-topology TWDM-PON

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Tan, Z., Yang, C., & Wang, Z. (2017). Energy consume analysis for ring-topology TWDM-PON front-haul enabled cloud RAN. Journal of Lightwave Technology, 35(20), 4526-4534. Article 8017375. https://doi.org/10.1109/JLT.2017.2745998