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Optimizing the network edge for flexible service provisioning

机译：优化网络边缘以实现灵活的服务供应

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The virtualization of network resources provides unique flexibility in service provisioning in most levels of the network stack. Softwarization of the network control and operation (SDN) is a key enabler of that development. Starting from the network core, SDN is a dominant trend in the evolution of network architectures with increased emphasis recently on the network edge. I will present some recent results in this area starting with a study on migration from legacy networking to SDN enabled network modules. The tradeoff between the benefits of SDN upgrades and the cost of deployment is addressed and captured by an appropriate sub-modular function that allows to optimize the penetration pace of the technology. Validation on some real world network topologies and traffic matrices will be presented as well. Then we move our attention to the network periphery. A wireless multi-hop extension at the network edge is considered and the problem of enabling SDN is addressed via replication of SDN controllers. The delay constraints of the controlled data-path elements is appropriately modeled and the problem of locating the controllers is addressed via optimization and a proof-of concept implementation. An alternate approach is considered then for the wireless network where we assume coexistence of SDN enabled components with network islands operating under distributed adhoc routing protocols. The trade-off of the coexistence is studied and the impact of SDN penetration is evaluated. Some paradigms of collaborative network services are presented finally as they are enabled by the above architectural evolution.
机译：网络资源的虚拟化为大多数网络堆栈级别的服务提供提供了独特的灵活性。网络控制和操作（SDN）的软化是该开发的关键推动力。从网络核心开始，SDN是网络体系结构演进中的主要趋势，最近越来越关注网络边缘。我将在此领域中提出一些最新结果，首先是对从传统网络迁移到支持SDN的网络模块的研究。 SDN升级的好处和部署成本之间的折衷是通过适当的子模块化功能来解决和捕获的，该子模块化功能可以优化技术的渗透速度。还将提供对一些实际网络拓扑和流量矩阵的验证。然后，我们将注意力转移到网络外围。考虑了在网络边缘的无线多跳扩展，并且通过复制SDN控制器解决了启用SDN的问题。可以对受控数据路径元素的延迟约束进行适当建模，并通过优化和概念验证实现来解决放置控制器的问题。然后针对无线网络考虑一种替代方法，在这种无线网络中，我们假设启用SDN的组件与在分布式自组织路由协议下运行的网络岛共存。研究了共存的权衡，并评估了SDN渗透的影响。最后，随着上述体系结构的演进，协作网络服务的一些范例将最终呈现出来。

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