A Reaserch And Design For NDN Based On QoS Guarantee Mechanism

With the rapid development of the Internet,the focus of Internet users is gradually transferred to how to quickly obtain information without paying attention to the location of information.However,the current TCP/IP network protocol architecture cannot adapt to the rapid development of today's content application needs.In order to adapt to the change of the Internet,the information-centered new network architecture(Named-Data Networking,NDN)has received wide attention.Different from traditional IP network,as one of the most important architecture of the future network,NDN network moves the focus of the current Internet from the location of the data to the content of the data for users and user applications,and it moves the data delivery model from host-to-host to point-to-point.NDN leads it can be more efficient for content retrieval and forward.At the meantime,the transmission reliability of a network is very important for data transmission.Different QoS management solutions for different network configurations can guarantee or improve the performance of the network,but the implementation of QoS management solution in NDN network is not yet defined.Therefore,it is important to define QoS parameters for NDN networks.This article for NDN network QoS guarantee mechanism is studied,designing a QoS guarantee NDN network architecture,adding new attributes to FIB and delay prediction for different type of Interests to choose the way of forwarding,thus improving the network transmission performance for QoS guarantee.The specific work of this article is as follows:First,it adds new name attribute PL(Priority level)for Interest naming and a PCT(popular content table)for the NDN.The PL will be changed by counting the times that Interests come and PL will influence the order that Interests come into the network node.Therefore,the QoS of the network will be improved by changing the priority level of the Interest according to the popular of the content.Secondly,three new types of data types will be implemented on NDN Interest package's naming:time-delay sensitive type,bandwidth sensitive type and general type.It designs a new forward algorithm that different type of Interest will have different and suitable way to forward,thus improving the overall utilization of network routing and reducing the load pressure of the router,which will improve the network QoS.Finally,it adds two new interfaces delay grade and bandwidth grade into NDN,and designs a new delay model and new neural network model for delay prediction.Combining the accurate DG by predicting and BG and the type of the Interest,it will choose a more suitable way to forward.The simulation results show that the network architecture and routing strategy can effectively improve the quality of network service for NDN.