The digital transformation is creating basically a digital version of our physical world and the currency in that digital space is data. Massive amount of data has been generated ranging from wearable devices monitoring our physical health every single millisecond to autonomous vehicles generating roughly 5Tb hourly to even astronomical activities producing an order of Exabytes on daily basis and then ultra-broadband Internet comes into play, moving such data to the cloud. Internet traffic therefore has been experiencing explosive growth and in this context, optical transport networks forming the backbone of the Internet are pushed for transformation in system capacity. While the intuitive solution of deploying multiple fibers can address the pressing demand for increased capacity, doing so does not bring improvement in economic of scales in terms of cost, power consumption and spectral efficiency. This necessitates for a different approach so that the fiber capacity could be utilized in a more efficient manner. In this paper, we focus on innovative techniques, that is, photonic network coding and partial protection, to reduce the effective traffic load in order to achieve greater capacity efficiency for optical transport networks. Specifically, the application of network coding is examined by upgrading the functionalities of intermediate nodes with all-optical processing (i.e., encoding and decoding) capabilities. Besides, partial protection relying on the premise of providing just enough bandwidth in case of failure events is investigated for saving the redundant protection capacity. That it takes two to tango, combining photonic network coding and partial protection therefore bring to light new opportunities and challenges. In mining such new avenue, we present insights on how to derive compounding gains to maximize spectral efficiency via a case study.
翻译:数字转换基本上创造了我们物理世界的数字化版本,数字空间就是数据。大量数据已经产生,从每毫秒可磨损的设备监测我们的身体健康到每毫秒自动汽车,每小时约5Tb小时到甚至天文活动,每天产生一个Exabytes的顺序,然后超宽带互联网开始发挥作用,将这些数据转移到云层上。因此,互联网交通经历了爆炸性增长,在此背景下,构成互联网主干线的光学运输网络被推向系统能力转变。部署多纤维的直观解决方案可以满足对提高能力的紧迫需求,但这样做在成本、电力消耗和光谱效率方面并没有带来规模经济上的改善。这需要采取一种不同的方法,以便能够更有效地利用纤维能力。在本文件中,我们侧重于创新技术,即光学网络的编码和部分保护,以减少光学运输网络的能力变化。具体地说,网络编码的应用是通过将中间节能的功能升级到中间节能的功能,而通过整个节能的节能的节能则通过节能的节能来进行。