In this study, a novel subscriber aware dynamic service function chaining (SFC) framework is developed by using open source software-defined networking (SDN) and network function virtualization (NFV) solutions, where the aim is to provide service chaining per user traffic and to transform SGi-LAN services into virtual network functions. With this SFC framework, customer based dynamically applicable value added services can be provided without the need for manual operation that would require vast effort. In order to show the performance and scalability of the proposed framework, the solution is tested in a live telecom lab with varying number of subscribers and thread counts. The test results show that the proposed solution can successfully manage subscribers dynamically without packet loss for 2 million simultaneous subscribers’ traffic flows when the system is overloaded, regardless of hardware or vendor. In addition, it has been observed that the service chain rules can be applied in a very short period such as 2.9 s for 10,000 simultaneous subscriber SFC requests even in the loaded traffic flows, while the CPU consumption of virtual machines remained between 23.5% and 28.5%. These results have proved that the proposed solution can be used in large-scale telecom networks.

在这项研究中，使用开放源代码的软件定义网络（SDN）和网络功能虚拟化（NFV）解决方案开发了一种新颖的用户感知动态服务功能链（SFC）框架，其目的是为每个用户流量和服务提供服务链。将SGi-LAN服务转换为虚拟网络功能。使用此SFC框架，可以提供基于客户的动态适用的增值服务，而无需人工操作，而这将需要大量的精力。为了显示所提出框架的性能和可伸缩性，该解决方案在具有不同订户数量和线程数的实时电信实验室中进行了测试。测试结果表明，所提出的解决方案可以在系统过载时动态成功管理用户，而不会造成200万个同时用户流量的数据包丢失，而无论硬件或厂商如何。此外，已经观察到，即使在加载的流量中，也可以在很短的时间内应用服务链规则，例如2.9秒以处理10,000个并发SFC请求，而虚拟机的CPU消耗保持在23.5％和28.5之间％。这些结果证明了所提出的解决方案可以用于大规模电信网络。即使在已加载的流量中，也有000个并发订户SFC请求，而虚拟机的CPU消耗保持在23.5％和28.5％之间。这些结果证明了所提出的解决方案可以用于大规模电信网络。即使在已加载的流量中，也有000个并发订户SFC请求，而虚拟机的CPU消耗保持在23.5％和28.5％之间。这些结果证明了所提出的解决方案可以用于大规模电信网络。