近年来，命名数据网络（named data networking，NDN）和软件定义网络（software defined networking，SDN）的结合被认为是网络架构创新的重要趋势，吸引了大量关注。虽然关于两者结合已有大量研究成果，但未能解决传统NDN的转发机制存在兴趣包泛洪和丢弃的固有问题。基于SDN在NDN架构设计了一种新型转发机制，在架构中分布式部署集中控制器，进行全局路由决策，并设计了兴趣包和数据包的具体转发流程。基于设计的转发机制，提出一种基于服务质量（quality of service，QoS）的新型路由算法，综合考虑资源消耗和网络负载均衡，并利用改进遗传算法求解。仿真结果表明所提路由转发机制有良好性能。
Abstract：
Combining named data networking (NDN) and software-defined networking (SDN) has been considered as an important trend and attracted a lot of attention in recent years. Although much work has been carried out on the integration of NDN and SDN, the forwarding mechanism to solve the inherent problems caused by the flooding scheme and discard of interest packets in traditional NDN is not well considered. To fill this gap, by taking advantage of SDN, we design a novel forwarding mechanism in NDN architecture with distributed controllers, where routing decisions are made globally. Then we show how the forwarding mechanism is operated for interest and data packets. In addition, we propose a novel routing algorithm considering quality of service (QoS) applied in the proposed forwarding mechanism and carried out in controllers. We take both resource consumption and network load balancing into consideration and introduce a genetic algorithm (GA) to solve the QoS constrained routing problem using global network information. Simulation results are presented to demonstrate the performance of the proposed routing scheme.
