The upcoming 5G networks promise to provide end-to-end network service delivery that spans across Cloud-Network federated multi-domains while providing monolithic service guarantees. By adopting a Cloud-Network federated multi-domain approach, heterogeneity raises a number of challenging Management and Orchestration (MANO) perspectives, especially concerning the need to deal with SDN controllers of multi-vendor approaches that lack a standard Northbound API. In this work, we tackle the issue of providing a seamless MANO of SDN Controllers running in Cloud-Network federated multi-domains. Owing to the weaknesses and limitations of the related works, we propose the WAN Infrastructure Manager Agnostic (WIMA) that enables a seamless and vendor-agnostic MANO abstraction to run on top of federated SDN multi-domains. The WIMA provides a common Northbound API for external triggering, maintains a global topology view of the federation as a whole, and deals with each SDN Controller directly by deploying an ontology-based scheme for efficient Northbound API mapping. The effectiveness and performance impact of WIMA was assessed in an emulated testbed with homogeneous (“Hom”) and heterogeneous (“Het”) multi-domain SDN control-planes, along with a varying density of active Tenants which simultaneously makes flow stress data connections during an experimental time of 900 s. The obtained results reveal that WIMA’s MANO abstraction system is able to connect around 52.66% (“Het”) and 86.87% (“Hom”) more end-to-end data flows across the federated SDN multi-domains while adding greater agility 52.72% (“Het”) and 85.27% (“Hom”) than the rival Baseline solution. Thus, the WIMA’s central logic has proven to be a suitable and feasible means of ensuring the MANO framework’s efficiency atop the multi-domain SDN Controllers within a Cloud-Network federation while optimizing the operation time.

即将到来的5G网络承诺将提供跨云网络联合多域的端到端网络服务交付，同时提供整体服务保证。通过采用云网络联合多域方法，异构性提出了许多具有挑战性的管理和协调（MANO）观点，特别是涉及到处理缺乏标准北向API的多供应商方法的SDN控制器的需求。在这项工作中，我们解决了提供在云网络联合多域中运行的SDN控制器的无缝MANO的问题。由于相关工作的弱点和局限，我们提出了W¯¯ AN我nfrastructure中号anager一个诺斯替（WIMA），从而使无缝且与供应商无关的MANO抽象能够在联邦SDN多域之上运行。WIMA提供了用于外部触发的通用北向API，维护了整个联盟的全局拓扑视图，并通过部署基于本体的方案进行有效的北向API映射，直接与每个SDN控制器打交道。在具有同质（“ Hom”）和异类（“ Het”）多域SDN控制平面以及变化的活动租户密度（同时建立流应力数据连接）的模拟测试台中评估了WIMA的有效性和性能影响在900 s的实验时间内。所得结果表明，WIMA的MANO抽象系统能够连接约52.66％（“ Het”）和86。跨联邦SDN多域的端到端数据流增加了87％（“ Hom”），同时比竞争对手的Baseline解决方案增加了52.72％（“ Het”）和85.27％（“ Hom”）的敏捷性。因此，事实证明，WIMA的中央逻辑是确保MANO框架在云网络联盟中的多域SDN控制器之上确保效率的同时，同时优化操作时间的一种合适且可行的方法。