Network Function Virtualization and Service Function Chaining Frameworks: A Comprehensive Review of Requirements, Objectives, Implementations, and Open Research Challenges
Network Function Virtualization and Service Function Chaining Frameworks: A Comprehensive Review of Requirements, Objectives, Implementations, and Open Research Challenges
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DOI：
10.3390/fi14020059
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发表时间：
2022-02-01
期刊：
影响因子：
3.4
通讯作者：
Pezaros, Dimitrios P.
中科院分区：
文献类型：
--
作者：
Adoga, Haruna Umar;Pezaros, Dimitrios P.
网络切片已成为下一代网络的基本属性，特别是因为5G标准化的固有部分是服务提供商将其部分或全部网络服务迁移到虚拟网络基础设施的能力，从而降低资本和运营成本。通过网络功能虚拟化（NFV），诸如防火墙、流量负载均衡器、内容过滤器和入侵检测系统（IDS）的网络功能（NF）在虚拟机（VM）或轻量级容器上被实例化，通常被链接在一起以创建服务功能链（SFC）。在这项工作中，我们审查了国家的最先进的NFV和SFC的实施框架，并提出了一个分类目前的建议。我们的分类法基于每个调查框架的主要目标包括三个主要类别：（1）资源分配和服务编排，（2）性能调优，以及（3）弹性和故障恢复。我们还确定了一些关键的开放研究挑战，需要研究界进一步探索，以实现下一代网络中可扩展，弹性和高性能的NFV/SFC部署。
Network slicing has become a fundamental property for next-generation networks, especially because an inherent part of 5G standardisation is the ability for service providers to migrate some or all of their network services to a virtual network infrastructure, thereby reducing both capital and operational costs. With network function virtualisation (NFV), network functions (NFs) such as firewalls, traffic load balancers, content filters, and intrusion detection systems (IDS) are either instantiated on virtual machines (VMs) or lightweight containers, often chained together to create a service function chain (SFC). In this work, we review the state-of-the-art NFV and SFC implementation frameworks and present a taxonomy of the current proposals. Our taxonomy comprises three major categories based on the primary objectives of each of the surveyed frameworks: (1) resource allocation and service orchestration, (2) performance tuning, and (3) resilience and fault recovery. We also identify some key open research challenges that require further exploration by the research community to achieve scalable, resilient, and high-performance NFV/SFC deployments in next-generation networks.