Abstract In the current scenario, there is a huge advancement in Information and Communication Technology (ICT), and almost most of the devices used in a smart city are the Internet of Things (IoT) based smart devices. To support high-speed IoT devices, wavelength division multiplexed passive optical networks (WDM-PON) is one of the most promising and most commonly used technology in optical distribution network (ODN). With the exponential growth of WDM-PON and its applications, energy consumption, operational expenditure (OPEX), communication latency between different users, reliability of service etc. are becoming the most challenging issues to implement the WDM-PON networks in the smart cities. In this paper, we propose a ring based latency aware and energy efficient PON architecture which is capable of providing point to point downstream, upstream, inter-ODN, intra-ODN and inter-ODN broadcasting transmission. Proposed architecture reduces the significant amount of transmission latency, energy consumption, operational expenditure and reduces the emission of Green House Gases (GHGs). The architecture also reduces the downstream and upstream bandwidth consumption by avoiding the transmission of the inter-ODN signal to optical line terminal (OLT) and back to destined ODN. The architecture seems appropriate for supporting various real-time high-speed ICT and IoT applications of a smart city.

中文翻译：

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具有 ODN 互连能力的基于环的延迟感知和节能混合 WDM TDM-PON，适用于智慧城市

摘要 在当前场景下，信息通信技术（ICT）取得了巨大进步，智慧城市中使用的几乎大部分设备都是基于物联网（IoT）的智能设备。为了支持高速物联网设备，波分复用无源光网络（WDM-PON）是光分配网络（ODN）中最有前途和最常用的技术之一。随着WDM-PON及其应用呈指数级增长，能耗、运营支出（OPEX）、不同用户之间的通信时延、服务可靠性等正成为智慧城市实施WDM-PON网络最具挑战性的问题。在本文中，我们提出了一种基于环的延迟感知和节能的 PON 架构，它能够提供点对点的下行流，上行、ODN 间、ODN 内和ODN 间广播传输。拟议的架构减少了大量的传输延迟、能源消耗、运营支出，并减少了温室气体 (GHG) 的排放。该架构还通过避免将 ODN 间信号传输到光线路终端 (OLT) 并返回到指定 ODN 来减少下行和上行带宽消耗。该架构似乎适合支持智慧城市的各种实时高速 ICT 和 IoT 应用。该架构还通过避免将 ODN 间信号传输到光线路终端 (OLT) 并返回到指定 ODN 来减少下行和上行带宽消耗。该架构似乎适合支持智慧城市的各种实时高速 ICT 和 IoT 应用。该架构还通过避免将 ODN 间信号传输到光线路终端 (OLT) 并返回到指定 ODN 来减少下行和上行带宽消耗。该架构似乎适合支持智慧城市的各种实时高速 ICT 和 IoT 应用。