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,” in 42nd 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.

中文翻译：

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NG-EPON光网络单位成本和上行传输性能波长部署方案分析

下一代以太网无源光网络 (NG-EPON) 于 2020 年由 IEEE 802.3 工作组标准化 [IEEE 802.3ca-2020-IEEE 以太网标准修正案 9：25 Gb/s 和 50 Gb 的物理层规范和管理参数/s 无源光网络，2020]。由于 NG-EPON 采用了信道绑定技术 [“25G EPON 及更高版本的最新进展”，在第 42 届欧洲光通信会议 (ECOC) (2016) 中。]，可以将多个波长分配给一个光网络单元 (ONU) ) 同时，导致更高的峰值传输速率。因此，在多个波长信道中分配流量提供了更大的调度灵活性、更高的峰值上行速率和更好的上行传输性能（即更低的延迟）；然而，这导致使用具有多个收发器的高成本 ONU，并进一步增加了 NG-EPON 的总成本。因此，在设计未来的NG-EPON时，选择合适的波长部署方案非常重要。在本文中，我们专注于静态场景下 ONU 成本和上行性能之间的权衡，我们开发了一个整数线性规划模型来表述问题。此外，我们提出了一种启发式波长部署方案比较和选择（WDSCS）算法，以有效地选择合适的波长部署方案。根据我们的仿真结果，我们提出的 WDSCS 算法可以有效地找到更精细的部署波长数，以平衡 ONU 的成本和上行传输性能。