基于OpenFlow技术的QoS管理系统的设计与实现

Design and implementation of QoS management system based on OpenFlow

随着网络上多媒体应用的大量涌现,人们对于网络服务质量提出了更高的要求,网络服务质量管理因此成为现代网络管理中必不可少的一部分。在使用传统的QoS管理系统来管理网络时,往往会因为网络的复杂性而使路由器的工作负载过重,从而成为网络管理的桎梏。针对这种现状,设计了一种新型的QoS管理系统——OF-QoS系统,并通过实验来证明OF-QoS系统不仅能够完成传统QoS管理系统的管理功能,还能有效地降低路由器的工作负载。OF-QoS系统利用了现有的OpenFlow技术来解决路由器的负载问题,它共由2分部分构成,分别是测量控制部分和指令执行部分,其中测量控制部分包括网络测量模块、评估模块和资源预留模块,指令执行部分由指令执行模块构成。

With the great increase of the multimedia applications, people have higher demand on the quality of service, so the management of QoS has become an indispensable part of the network management now. But when using the traditional QoS management system to manage the network, the router may become over-loaded due to the complexity of the network. In consideration of this situa- tion, a new QoS management system named OF-QoS is designed based on the OpenFlow. Experi- mental data proved that the OF-QoS not only can complete the management function as the tradition- al QoS management system, but also can effectively reduce the work load of the router. The OF-QoS system is composed of two parts： measurement and control part and instruction execution part. The measurement and control part consists of network measurement module, evaluate module and resource reservation module and the instruction execution part has only one module named instruction execution module.