AI 中文总结
针对5G-Advanced/6G网络跨切片会话迁移中断问题，提出智能编排器Orchra，通过外化设备状态实现低延迟状态保留迁移，将用户平面中断时间缩短超一半，安全开销可忽略。
AI 中文摘要
网络切片是第五代（5G）-Advanced及新兴第六代（6G）网络的基础能力，但实际支持的无缝运行时切片迁移仍有限。标准云原生5G架构缺乏原生支持有状态的切片间/切片内会话迁移，依赖高开销的非接入层（NAS）重注册、容器重新部署等操作，会中断用户平面流量长达245.50毫秒。为解决该局限，本文提出Orchra，一款用于有状态低延迟上下文传输的智能编排器。通过将关键用户设备状态——包括NAS上下文、安全密钥和协议数据单元（PDU）会话信息——外化到临时暂存层，Orchra可在无需完整重注册的情况下保持跨切片边界的会话连续性。实验评估显示，与传统第三代合作伙伴计划（3GPP）方案相比，Orchra将用户平面中断时间缩短至原有的一半以上，且产生的安全开销可忽略不计。这些结果表明，该方案是实现云原生5G-Advanced网络中无缝、状态保留的切片迁移的实用且可复现的方法。
英文摘要
Network slicing is a foundational capability of Fifth Generation (5G)-Advanced and emerging Sixth Generation (6G) networks, yet practical support for seamless runtime slice transitions remains limited. Standard cloud-native 5G architectures lack native support for stateful inter/intra-slice session migration, relying instead on high-overhead Non-Access Stratum (NAS) re-registrations, container redeployment etc., which disrupt userplane traffic for up to 245.50 ms. To address this limitation, we present Orchra, an intelligent orchestrator for stateful, low-latency context transfer. By externalizing critical user equipment state-including NAS context, security keys, and Protocol Data Unit (PDU) session information-into a transient staging layer, Orchra preserves session continuity across slice boundaries without requiring full re-registration. Experimental evaluation shows that Orchra reduces this userplane interruption by more than twice in comparison to conventional Third Generation Partnership Project (3GPP)-based approaches while incurring negligible security overhead. These results demonstrate a practical and reproducible approach for enabling seamless, state-preserving slice transitions in cloud-native 5G-Advanced networks.
CommentsAccepted by the IEEE CSCN 2026
