Emerging optical access network technologies for 5G wireless [invited]
Emerging optical access network technologies for 5G wireless [invited]
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DOI：
10.1364/jocn.8.000b70
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Xiang Liu;F. Effenberger
中科院分区：
文献类型：
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作者：
Xiang Liu;F. Effenberger
随着无线接入网络的进步，越来越多的移动数据内容需要通过光网络来传输。移动前传是连接集中式基带单元（BBU）与云无线电接入网络（C-RAN）中的远程无线电单元的重要网络部分。它支持先进的无线技术，例如协调多点和大规模多输入多输出。另一方面，移动回程将 BBU 与核心网络连接起来，将基带数据流传输到各自的目的地。光接入网络能够很好地满足 C-RAN 的首要光通信需求。为了更好地满足第五代（5G）无线等下一代无线网络的严格要求，需要改进和增强光接入网络。在本文中，我们回顾了新兴的光接入网络技术，这些技术旨在支持高容量、低延迟、低成本和每比特功耗的 5G 无线技术。将回顾高容量无源光网络 (PON) 的进展，例如 100 Gbit/s PON。讨论的主题包括先进的调制和检测技术、专为光接入网络定制的数字信号处理以及高效的移动前传技术。我们还讨论了 RAN 和 PON 之间协调的必要性，以简化整个网络、减少网络延迟、提高网络成本效率和功率效率。
With the advancement of radio access networks, more and more mobile data content needs to be transported by optical networks. Mobile fronthaul is an important network segment that connects centralized baseband units (BBUs) with remote radio units in cloud radio access networks (C-RANs). It enables advanced wireless technologies such as coordinated multipoint and massive multiple-input multiple-output. Mobile backhaul, on the other hand, connects BBUs with core networks to transport the baseband data streams to their respective destinations. Optical access networks are well positioned to meet the first optical communication demands of C-RANs. To better address the stringent requirements of future generations of wireless networks, such as the fifth-generation (5G) wireless, optical access networks need to be improved and enhanced. In this paper, we review emerging optical access network technologies that aim to support 5G wireless with high capacity, low latency, and low cost and power per bit. Advances in high-capacity passive optical networks (PONs), such as 100 Gbit/s PON, will be reviewed. Among the topics discussed are advanced modulation and detection techniques, digital signal processing tailored for optical access networks, and efficient mobile fronthaul techniques. We also discuss the need for coordination between RAN and PON to simplify the overall network, reduce the network latency, and improve the network cost efficiency and power efficiency.