This paper studies Radio Access Network (RAN) slicing strategies for 5G Industry~4.0 networks with ultra-reliable low-latency communication (uRLLC) requirements. We comparatively analyze four RAN slicing deployment options that differ in slice sharing and per-line or per-flow isolation. Unlike prior works that focus on management architectures or resource allocation under a fixed slicing structure, this work addresses the design of RAN slicing deployment options in the presence of multiple production lines and heterogeneous industrial flows. An SNC-based analytical framework and a heuristic slice planner are used to evaluate these options in terms of per-flow delay guarantees and radio resource utilization. Results show that under resource scarcity only per-flow slicing prevents delay violations by tightly matching resources to per-flow delay targets, while slice-sharing and hybrid deployments improve aggregation efficiency at the cost of weaker protection for the most delay-critical flows. Execution-time results confirm that the planner operates at Non-RT time scales, enabling its integration within O-RAN Non-RT RIC loops.

翻译：本文研究了具有超可靠低延迟通信（uRLLC）需求的5G工业4.0网络中的无线接入网（RAN）切片策略。我们比较分析了四种RAN切片部署选项，这些选项在切片共享与每条生产线或每个流的隔离程度上有所不同。与以往关注固定切片结构下的管理架构或资源分配的研究不同，本文针对存在多条生产线和异构工业流的情况，探讨了RAN切片部署选项的设计。我们采用基于SNC的分析框架和启发式切片规划器，从每流延迟保障和无线资源利用率角度评估这些选项。结果表明，在资源稀缺条件下，只有每流切片通过将资源紧密匹配到每流延迟目标来防止延迟违规，而切片共享和混合部署虽然提高了聚合效率，但代价是对最延迟敏感的流保护能力较弱。执行时间结果证实，该规划器可在非实时时间尺度上运行，从而能够集成到O-RAN非实时RIC循环中。