Passive optical network (PON) technology offers an attractive cost-efficient alternative to support 5G and Beyond 5G mobile network fronthauling (MFH). However, MFH for such networks is challenging given its high bandwidth and strict latency requirements. To reduce these requirements, radio access network functional splitting has been introduced in 5G networks; this provides more flexibility in resource allocation since the protocol stack is distributed between the centralized and the distributed units. In contrast to the conventional MFH requirement of physical-layer splittings, the MFH traffic produced by link-layer splittings becomes more dependent on the actual user traffic load. By capitalizing on the characteristics of the new MFH traffic with functional splitting, this article introduces a mechanism to improve the performance of PONs serving MFH.

中文翻译：

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用于 5G 及以后的 5G 低延迟移动前传服务的无源光网络

无源光网络 (PON) 技术为支持 5G 和超越 5G 的移动网络前传 (MFH) 提供了一种极具吸引力的经济高效的替代方案。然而，鉴于其高带宽和严格的延迟要求，此类网络的 MFH 具有挑战性。为了降低这些要求，5G 网络中引入了无线接入网功能拆分；这为资源分配提供了更大的灵活性，因为协议栈分布在集中式单元和分布式单元之间。与物理层拆分的传统 MFH 要求相比，链路层拆分产生的 MFH 流量变得更加依赖于实际用户流量负载。通过利用新MFH流量的特点进行功能拆分，