地理分布式系统的NFV布局算法
NFV Orchestrator Placement for Geo-Distributed Systems
摘要：
欧洲电信标准协会（ETSI）开发了网络功能虚拟化（NFV）管理和演示（MANO）框架。在该框架内，NFV编排器（NFVO）和虚拟化网络功能（VNF）管理器（VNFM）功能块负责管理网络服务及其相关联的VNF的生命周期。然而，它们在大规模和地理分布的NFV系统中面临着显著的可扩展性和性能挑战。它们的数量和位置对可以容纳的VNF的数量以及整体系统性能具有重大影响。因此，NFVO和VNFM放置是一个关键的挑战，因为它对系统的可扩展性和性能有潜在的影响。在本文中，我们解决了NFVO和VNFM在大规模和地理分布的NFV基础设施中的放置问题。我们提出了一个整数线性规划的问题，并提出了一个两步布局算法来解决这个问题，我们还进行了一组实验来评估所提出的算法。
英文摘要：
The European Telecommunications Standards Institute (ETSI) developed Network Functions Virtualization (NFV) Management and Orchestration (MANO) framework. Within that framework, NFV orchestrator (NFVO) and Virtualized Network Function (VNF) Manager (VNFM) functional blocks are responsible for managing the lifecycle of network services and their associated VNFs. However, they face significant scalability and performance challenges in large-scale and geo-distributed NFV systems. Their number and location have major implications for the number of VNFs that can be accommodated and also for the overall system performance. NFVO and VNFM placement is therefore a key challenge due to its potential impact on the system scalability and performance. In this paper, we address the placement of NFVO and VNFM in large-scale and geo-distributed NFV infrastructure. We provide an integer linear programming formulation of the problem and propose a two-step placement algorithm to solve it. We also conduct a set of experiments to evaluate the proposed algorithm.
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