Software Defined Networking (SDN) promises greater flexibility for directing packet flows, and Network Function Virtualization promises to enable dynamic management of software-based network functions. However, the current divide between an intelligent control plane and an overly simple, stateless data plane results in the inability to exploit the flexibility of a software based network. In this paper we propose SDNFV, a framework that expands the capabilities of network processing-and-forwarding elements to flexibly manage packet flows, while retaining both a high performance data plane and an easily managed control plane.
SDNFV proposes a hierarchical control framework where decisions are made across the SDN controller, a host-level manager, and individual VMs to best exploit state available at each level. This increases the network's flexibility compared to existing SDNs where controllers often make decisions solely based on the first packet header of a flow. SDNFV intelligently places network services across hosts and connects them in sequential and parallel chains, giving both the SDN controller and individual network functions the ability to enhance and update flow rules to adapt to changing conditions. Our prototype demonstrates how to efficiently and flexibly reroute flows based on data plane state such as packet payloads and traffic characteristics.
A Novel Framework for Software Defined Wireless Body Area Network
软件定义网络（Software Defined Networking，SDN）通过提供灵活和动态的网络管理，在取代传统网络方面获得了巨大的普及。它引起了学术界和工业界研究人员的极大关注。特别是，将SDN纳入无线体域网（WBAN）应用表明，在处理流量管理、认证、能效等挑战方面具有很大的优势，同时增强了管理控制。本文提出了一种新的软件定义WBAN（SDWBAN）框架，它将SDN技术的概念引入WBAN应用。通过解耦控制平面和数据平面，并有更多的编程控制将有助于克服目前的不足和挑战的WBAN。因此，我们提供了一个概念框架SDWBAN与分组流模型和未来的研究方向有关SDWBAN。
