Optical coding monitoring system for emerging fibre-to-the-home networks

光纤到户（FTTH）是解决最后/第一英里电信瓶颈的不断发展的解决方案。近年来，FTTH在北美和日本进行了广泛的部署。在日本，FTTH服务的需求每年增长80%，而DSL的需求仅为3%。目前共享同一光纤的客户数量在16到32之间，短期行业预测在64到128之间。工业和学术实验室已经报告了1024个客户通过时分复用和无源光网络的波分复用（TDM/WDM-PON）共享同一光纤。这些复杂的光网络基础设施仍然需要集中监控，并且仍然存在许多技术挑战。事实上，没有任何已知的产品或技术能够为每根光纤支持20到30个客户的大容量脑桥提供可靠的解决方案。我们建议使用正在申请专利的光编码技术，为最小容量为128个客户的FTTH-PON开发一个监控系统的alpha原型。该技术是成熟的，而将该技术应用于监测是新的。我们已经通过模拟检查了我们的解决方案的容量，发现每根光纤的监控容量为数百到数千个客户。我们的技术有潜力满足近期和长期的行业需求。 我们的技术的主要特点包括它的简单性，成熟的组件（货架组件的利用），低成本的组件，其固有的能力，允许集中监控，从而使电信服务提供商的完整信息和控制他们的网络基础设施。替代解决方案仅处于非常早期的研究状态，不切实际，并且缺乏对服务提供商至关重要的监督和故障排除信息。我们的高容量在役FTTH监控设备解决方案采用简单而成熟的光编码技术，仅调用标准U波段（符合ITU-T L.41的1650 nm）内的一个波长。

Fibre-to-the-home (FTTH) is the evolving solution for the last/first mile telecom bottleneck. Extensive FTTH deployments have been carried out in North America and Japan over recent years. The demand for FTTH services is growing at 80% per year compared to 3% for DSL in Japan. The number of customers sharing the same fibre is currents ranges from 16 to 32 and near term industry forecast predict ranges from 64 to 128. Industrial and academic laboratories already report 1024 customers sharing the same fibre by means of time division multiplexing together with wavelength division multiplexing of passive optical networks (TDM/WDM-PON). The need re-mains for centralized monitoring of these complex optical network infrastructures, and many technologic challenges remain. Indeed, no known product, nor technology, offers a serious solution for high capacity PONs sup-porting more than 20 to 30 customers per fibre.We propose to develop an alpha prototype of a monitoring system for an FTTH-PON with a minimum capacity of 128 customers, using our patent-pending optical coding technology. The technology is mature, while application of the technology to monitoring is new. We have examined the capacity of our solution via simulation, and find a monitoring capacity of hundreds to thousand of customers per fibre. Our technology has the potential to fulfill the near and long term industry requirements.   Key features of our technology include its simplicity, the maturity of the components (exploits of the shelf components), low cost components, and its inherent ability to allow centralized monitoring, thus giving telecom service providers full information and control of their networking infrastructure. Alternative solutions have only achieved a very early research state, are impractical, and lack supervisory and troubleshooting information that is crucial to service providers. Our solution of high capacity In-Service FTTH monitoring equipment uses a simple and mature optical coding technology that calls on only one wavelength inside the standard U band (1650 nm in compliance with ITU-T L.41).