Resource Allocation in NFV: A Comprehensive Survey
Resource Allocation in NFV: A Comprehensive Survey
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DOI：
10.1109/tnsm.2016.2598420
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发表时间：
2016-09-01
影响因子：
5.3
通讯作者：
Botero, Juan Felipe
中科院分区：
文献类型：
--
作者：
Herrera, Juliver Gil;Botero, Juan Felipe
网络功能虚拟化（NFV）是一种新的网络架构框架，在该框架中，传统上使用专用硬件（中间盒或网络设备）的网络功能现在通过在通用硬件（如大容量服务器）上运行的软件来实现。NFV是由行业（网络运营商、电信运营商和制造商）发起的一项倡议，目的是提高运营商网络内部新网络服务部署的灵活性和集成度，使其更具敏捷性，并大幅降低运营支出和资本支出。NFV促进了对转码器、防火墙和负载均衡器等网络功能的虚拟化，这些功能以前是由专用硬件设备执行的，现在将它们迁移到基于软件的设备上。NFV部署的主要挑战之一是在基于NFV的网络基础设施中对所需网络服务进行资源分配。这一挑战被称为NFV资源分配（NFV - RA）问题。本文通过对解决该问题的主要方法进行新的分类，全面介绍了NFV - RA的研究现状。本文还提出了在NFV - RA领域仍需未来研究的挑战。
Network functions virtualization (NFV) is a new network architecture framework where network functions that traditionally used dedicated hardware (middleboxes or network appliances) are now implemented in software that runs on top of general purpose hardware such as high volume servers. NFV emerges as an initiative from the industry (network operators, carriers, and manufacturers) in order to increase the deployment flexibility and integration of new network services with increased agility within operator's networks and to obtain significant reductions in operating expenditures and capital expenditures. NFV promotes virtualizing network functions such as transcoders, firewalls, and load balancers, among others, which were carried out by specialized hardware devices and migrating them to software-based appliances. One of the main challenges for the deployment of NFV is the resource allocation of demanded network services in NFV-based network infrastructures. This challenge has been called the NFV resource allocation (NFV-RA) problem. This paper presents a comprehensive state of the art of NFV-RA by introducing a novel classification of the main approaches that pose solutions to solve it. This paper also presents the research challenges that are still subject of future investigation in the NFV-RA realm.