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Optimization scheme for WDM-based transmission technology selection in future passive optical networks

机译：未来无源光网络中基于WDM的传输技术选择的优化方案

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Future passive optical networks (PONs) are expected to support much larger capacity and much wider coverage. How to jointly address these two design requirements represents one of the most challenging aspects in today's research on PONs. So far, most research efforts have been devoted to devising new architectural or technological solutionsto support such stringent requirements. In particular, the technology to be used for transmission may have diverse multiplexing techniques, types of transceivers, modulation formats, and detection techniques. However, the question of which transmission technology is the most effective considering the trade-offs in terms of complexity, offered capacity, and reach is still open. In this paper, we aim at answering this question comparing the use of time division multiplexing (TDM), wavelength division multiplexing (WDM), and hybrid TDM/WDM techniques in PONs. To achieve this goal, we first categorize the main options for transmission technologies in PONs in three families: colored dense WDM (DWDM), tunable DWDM, and colorless DWDM. Then, we propose a new optimization scheme that selects the optimal transmission technology for different operational scenarios that are defined by varying the number of users, the distance to the users, and the traffic load. The choice of the passive optical components to be used at the remote node is also part of the optimization scheme given its significant impact on the choiceof the transmission technology. As a result, we report and discuss which transmission technologies are the most suitable under different operational scenarios.
机译：预计未来的无源光网络（PON）将支持更大的容量和更大的覆盖范围。如何共同满足这两个设计要求是当今PON研究中最具挑战性的方面之一。迄今为止，大多数研究工作都致力于设计新的体系结构或技术解决方案，以支持这种严格的要求。特别地，要用于传输的技术可以具有多种复用技术，收发器的类型，调制格式和检测技术。但是，考虑到在复杂性，提供的容量和覆盖范围方面的权衡，哪种传输技术最有效的问题仍然存在。在本文中，我们旨在通过比较PON中时分复用（TDM），波分复用（WDM）和混合TDM / WDM技术的使用来回答这个问题。为了实现此目标，我们首先将PON中传输技术的主要选项分为三个系列：有色密集WDM（DWDM），可调DWDM和无色DWDM。然后，我们提出了一种新的优化方案，该方案针对通过改变用户数量，到用户的距离以及流量负载来定义的不同操作场景，选择了最佳传输技术。鉴于要对传输技术的选择产生重大影响，因此选择要在远程节点使用的无源光学组件也是优化方案的一部分。因此，我们报告并讨论了哪种传输技术在不同的操作方案下最适合。

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