Yin Shan, Ding Sicong, Wang Zhenhao, Zhang Wenchao, Huang Shanguo
Opt Express. 2022 Jul 18;30(15):27623-27644. doi: 10.1364/OE.460060.
Space division multiplexing elastic optical network (SDM-EON) enables high-capacity transmission, in which the network nodes should provide high switching flexibility while limiting the complexity and costs of nodes. Architecture on demand (AoD) nodes can meet these requirements but the slow configuration time of optical backplane in AoD nodes makes it difficult to serve latency-sensitive requests. In this paper, we propose a hybrid optical backplane based on micro-electromechanical systems (MEMS) and semiconductor optical amplifier (SOA) switches to provide fast configuration time for AoD nodes. Moreover, we propose quantitative measures of node switching flexibility in SDM-EONs and of link configuration speed in AoD nodes. Based on the hybrid backplane architecture and the measurement approaches, we propose a flexibility and fragmentation aware routing, spectrum and core allocation algorithm and an AoD synthesis algorithm. Simulation results show that the hybrid AoD nodes with support of spatial lane change can reduce network blocking probability. The AoD based on this hybrid backplane structure can improve the network performance by 32.8% compared to the AoD based on the traditional MEMS. Compared with traditional reconfigurable optical add/drop multiplexers (ROADMs), the hybrid AoD nodes can control the number of wavelength selective switch (WSS) ports.
空分复用弹性光网络（SDM-EON）能够实现高容量传输，其中网络节点应在限制节点复杂性和成本的同时提供高交换灵活性。按需架构（AoD）节点可以满足这些要求，但AoD节点中光背板的配置时间较慢，使得其难以服务对延迟敏感的请求。在本文中，我们提出了一种基于微机电系统（MEMS）和半导体光放大器（SOA）开关的混合光背板，为AoD节点提供快速配置时间。此外，我们提出了SDM-EON中节点交换灵活性以及AoD节点中链路配置速度的量化度量。基于混合背板架构和测量方法，我们提出了一种灵活性和碎片感知路由、频谱和核心分配算法以及一种AoD合成算法。仿真结果表明，支持空间车道变更的混合AoD节点可以降低网络阻塞概率。基于这种混合背板结构的AoD与基于传统MEMS的AoD相比，可将网络性能提高(32.8%)。与传统的可重构光分插复用器（ROADM）相比，混合AoD节点可以控制波长选择开关（WSS）端口的数量。
