基于下一代PON和移动类WLAN技术的FiWi接入网：容量和时延分析（扩展版）
FiWi Access Networks Based on Next-Generation PON and Gigabit-Class WLAN Technologies: A Capacity and Delay Analysis (Extended Version)
摘要：
当前的无源光网络（PON）演进为下一代PON，其中高速10+ Gb/s时分复用（TDM）和长距离波长广播/路由波分复用（WDM）PON是有希望的近期候选者。另一方面，基于帧聚合技术的下一代无线局域网（WLAN）将利用物理层增强，从而产生以太网级甚高吞吐量（VHT）WLAN。在本文中，我们开发了一个分析框架，用于评估各种路由算法的容量和延迟性能的融合光纤无线（FiWi）宽带接入网络的基础上不同的下一代PON和一个多无线电多信道WLAN网状前端。我们的框架是非常灵活的，并结合了任意的帧大小分布，流量矩阵，光/无线传播延迟，数据率，和光纤故障。我们验证了我们的概率分析的准确性，通过模拟的无线和无线光无线操作模式的各种FiWi网络架构下的对等，上游，统一和不统一的交通情况。结果表明，我们提出的优化FiWi路由算法（OFRA）优于最小（无线）跳和延迟路由的吞吐量平衡和不平衡的流量负载方面，在一个小到中等的流量负载的平均延迟略有增加的代价。
英文摘要：
Current Gigabit-class passive optical networks (PONs) evolve into next-generation PONs, whereby high-speed 10+ Gb/s time division multiplexing (TDM) and long-reach wavelength-broadcasting/routing wavelength division multiplexing (WDM) PONs are promising near-term candidates. On the other hand, next-generation wireless local area networks (WLANs) based on frame aggregation techniques will leverage physical layer enhancements, giving rise to Gigabit-class very high throughput (VHT) WLANs. In this paper, we develop an analytical framework for evaluating the capacity and delay performance of a wide range of routing algorithms in converged fiber-wireless (FiWi) broadband access networks based on different next-generation PONs and a Gigabit-class multi-radio multi-channel WLAN-mesh front-end. Our framework is very flexible and incorporates arbitrary frame size distributions, traffic matrices, optical/wireless propagation delays, data rates, and fiber faults. We verify the accuracy of our probabilistic analysis by means of simulation for the wireless and wireless-optical-wireless operation modes of various FiWi network architectures under peer-to-peer, upstream, uniform, and nonuniform traffic scenarios. The results indicate that our proposed optimized FiWi routing algorithm (OFRA) outperforms minimum (wireless) hop and delay routing in terms of throughput for balanced and unbalanced traffic loads, at the expense of a slightly increased mean delay at small to medium traffic loads.
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