面向基于NFV和SDN的“服务定义”网络的会话边界控制器虚拟化

G. Monteleone, P. Paglierani
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引用次数: 26

摘要

网络功能虚拟化(NFV)与软件定义网络(SDN)相辅相成的承诺可以简单地表述为:获得更多,付出更少。采用这样的范例,服务运营商期望实现资本投资的大幅减少和更高的操作灵活性。然而,将这些概念应用于现有网络将需要具有挑战性的架构更新,以及服务模型和操作过程的深刻变化。为了分析这些方面,在本文中,我们概述了Italtel研发实验室在这一领域的经验,并讨论了这些技术的最新和未来前景。特别是,我们描述了NFV如何应用于特定的网络功能,会话边界控制器,解决了一些普遍感兴趣的相关技术问题,并提供了可伸缩性和灵活性。最后,我们讨论了这种虚拟化网络功能的演变,以及将其集成到基于sdn的网络中。
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Session Border Controller Virtualization Towards "Service-Defined" Networks Based on NFV and SDN
The promises of Network Functions Virtualization (NFV) complemented with Software Defined Networking (SDN) can be simply stated as: get much more, pay much less. Adopting such paradigms, Service Operators expect to achieve high reductions in capital investments and greater operational agility. However, applying these concepts to existing networks will require challenging architectural updates, as well as deep changes in service models and operating procedures. To analyze such aspects, in this paper we provide an overview of the experience gathered at Italtel R&D labs in this field, and discuss state-of-the-art and future perspectives of these technologies. In particular, we describe how NFV was applied to a specific network function, the Session Border Controller, solving some related technical issues of general interest, and providing scalability and flexibility. Finally, we discuss the evolution of this virtualized network function, and its integration into an SDN-based network.
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