ID 原文 译文
45056 仿真结果表明，所提资源分配机制能够降低能耗，同时有效地减小了时延，提高了吞吐量。 The simulation results show that the proposed resource allocation mechanism can reduce energy consumption while effectively reducing the latency and improving the throughput.
45057 正交频分复用无源光网络(OFDM-PON，orthogonal frequency division multiplexing passive optical network)具有带宽容量大、资源分配灵活等优势，被公认为下一代光接入网的重要候选技术之一。 Due to the superiority in large bandwidth capacity and flexible resource allocation, orthogonal frequency division multiplexing passive optical network (OFDM-PON) has been recognized as one of the promising candidates for the next generation PON.
45058 目前，OFDM-PON 系统结构的相关研究层出不穷， There are many research works on the system architecture design of OFDM-PON.
45059 然而这些研究大多专注于物理结构和信号传输技术，缺少与新型系统结构相适应的带宽分配算法。 However, most of these works focused on the techniques of physical structure and signal transmission and less addressed the bandwidth allocation algorithms supporting the new types of system architecture.
45060 OFDM-PON 中带宽分配涉及时域、频域、比特等多维资源的联合优化，是保证多业务接入和服务质量的关键技术。 The bandwidth allocation in OFDM-PON, which is one of the key techniques to enable the access of multi-service, refers to the joint optimization of multi-dimensional resources in time domain, frequency domain and bits.
45061 针对 OFDM-PON 的增强型系统结构，提出多业务分层带宽分配算法，以实现增强型OFDM-PON 系统带宽资源的高效利用。 A layered bandwidth allocation algorithm was proposed for multi-service in the enhanced system architecture of OFDM-PON, aiming at the efficient bandwidth resource utilization.
45062 仿真结果表明，相比传统 OFDM-PON 系统中无分层带宽分配算法，增强型 OFDM-PON 的分层带宽分配算法在带宽资源利用率和数据分组时延等性能方面具有明显优势。 Simulation results prove that the proposed bandwidth allocation algorithm outperforms the conventional algorithms without layered transmission significantly in terms of resource utilization and packet delay.
45063 在波分复用光网络向弹性光网络演进过程中，需要将传统的光节点升级为支持无栅格特性的新型可重构光分插复用器（ROADM）。 For migration from dense wavelength division multiplexing (DWDM) networks to elastic optical networks(EON), it is required to upgrade the traditional reconfigurable optical add-drop multiplexer (ROADM) to the new-generation ROADM that supports flexible grids.
45064 然而，对于一个大型网络来说，其节点不可能一次性全部升级，而是存在一个逐步升级的过程。 However, for a large-scale optical network, it is generally impossible to upgrade the ROADM nodes all in once; rather, they would be upgraded gradually.
45065 针对该问题，重点研究了升级光节点的选择策略， For this, it is critical to study different strategies for selecting the ROADM nodes to be upgraded.