Analysis of wavelength deployment schemes in terms of optical network unit cost and upstream transmission performance in NG-EPONs

Chenxiao Zhang, Mingcong Yang, Weichang Zheng, Yu Zheng, Yunyi Wu, and Yongbing Zhang

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Author Affiliations

Chenxiao Zhang,Mingcong Yang,Weichang Zheng,^*Yu Zheng,Yunyi Wu,and Yongbing Zhang

Graduate School of Systems and Information Engineering, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan

^*Corresponding author:s2030110@s.tsukuba.ac.jp

ORCID

ChenxiaoZhang	https://orcid.org/0000-0001-5510-1907
MingcongYang	https://orcid.org/0000-0002-4581-0547

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Abstract

Next-generation Ethernet passive optical networks (NG-EPONs) were standardized by the IEEE 802.3 Working Group in 2020 [IEEE 802.3ca-2020–IEEE Standard for Ethernet Amendment 9: physical layer specifications and management parameters for 25 Gb/s and 50 Gb/s passive optical networks, 2020]. Due to the channel bonding technology [“Recent progress on 25G EPON and beyond,” in42nd European Conference on Optical Communication (ECOC) (2016).] adopted by NG-EPONs, multiple wavelengths can be assigned to an optical network unit (ONU) simultaneously, leading to higher peak transmission rates. As a result, assigning traffic in multiple wavelength channels provides greater scheduling flexibility, a higher peak upstream rate, and better upstream transmission performance (i.e., lower latency); however, it leads to the use of high-cost ONUs with multiple transceivers and further increases the total cost of NG-EPONs. Therefore, selecting a proper wavelength deployment scheme is very important when designing future NG-EPONs. In this paper, we focus on the trade-off between ONU cost and the upstream performance in a static scenario, and we develop an integer linear programming model to formulate the problem. In addition, we propose a heuristic wavelength deployment scheme comparison and selection (WDSCS) algorithm to effectively select appropriate wavelength deployment schemes. According to our simulation results, our proposed WDSCS algorithm can efficiently find a finer number of deployment wavelengths to balance the cost of ONUs and the upstream transmission performance. The wavelength deployment schemes for future NG-EPONs can also be specified based on whether network operators prioritize network performance or cost.

© 2021 Optical Society of America

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