SN 国家重点实验室 Chapter Three Network Function Virtualization 3.1 concepts and architecture of NFV 3.2 application and research challenges 2020/5/21 Dr. Zhanqi XU, National Key Lab on ISN,Xidian University
N 国家重点实验室 1.background and motivation Trends Mobility,explosion of devices and traffic Application of cloud services ● High performance industry standard servers shipped in very high volume ● Convergence of computing,storage and networks ● New virtualization technologies that abstract underlying hardware yielding elasticity,scalability and automation ● Software-defined networking technique and NFV need each other,which also makes beneficial to each other 2020/5/21 Dr.Zhanqi xu,National Key Lab on ISN,Xidian University 2
-continued 国家重点实验室 Challenges ● CapEx:Huge capital investment to deal with current trends ● OpEx:Network operators face an increasing disparity ( between costs and revenues ● Complexity:large and increasing variety of proprietary hardware appliances in operator's network ● Reduced hardware lifecycles ● Lack of flexibility and agility:cannot move network resources where when needed ● Launching new services is difficult and takes too long.Often requires yet another proprietary box which needs to be integrated into existing systems 2020/5/21 Dr.Zhangi xu,National Key Lab on ISN,Xidian University 3
Network Functions Virtualization NFV)is about implementing network functions in software that runs today on proprietary hardware,leveraging( 对..产生巨大影响)(high volume)standard servers and IT virtualization ● Supports multi-versioning(看法、观点)and multi--tenancy of network functions ● Allows use of a single physical platform for different applications,users and tenants ●Enables new ways to implement resilience(弾性)，service assurance,test& diagnostics and security surveillance(监督) O Facilitates innovation towards new network functions and services that are only practical in a pure software network environment Applicable to any data plane and control plane functions (fixed or mobile networks) Automation of management and configuration of functions is important for NFV to scale NFV aims to ultimately transform the way that network operators architect and operate their networks even though change will be incremental
N Network Functions Virtualization:Vision 国家重点实验室 Classical Network Appliance Network Functions Virtualisation Approach Approach Independent Software Vendors Competitive Innovative Virtual 新rtual Virtual Virtual Message CDN Session Border WAN Appliance Open Ecosystem Controller Acceleration Router Virtual Virtual Virtual 0.O Orchestrated, DPI Firewall Carrier Tester/QoE automatic remote install. Grade NAT monitor High volume standard servers MG Router BRAS Radio/Fixed Access Network Nodes High volume standard storage 。 Fragmented,purpose-built hardware. Physical install per appliance per site. Hardware development large barrier to entry for new vendors,constraining innovation High volume Ethernet switches competition. Natinat Key Eub on I3N,Xidian University 5