The Research Of Multi-path Routing Mechanism In Named Data Networking

With the rapid development of the current Internet technology and applications,the traditional host-centered TCP/IP network gradually exposed lots of problems.For example,in terms of security,using IP address only for data forwarding may lead to malicious attacks;The communication session cannot provide flexible mobility support by binding addresses.Faced with these problems,the researchers have proposed a series of new future Internet architectures,among which,named data networking,one of the most representative Internet architectures of the future,has been received extensive attention of the researchers from all over the world.Nodes in the network have a certain storage capacity,and data's routing and forwarding is based on the name of the content.The research of this thesis is mainly based on the disjoint multipath,and using multiple path at the same time.Nodes in named data networking has a certain storage ability,by using the data stored in the network efficiently can achieve fast content acquisition.Aiming at how to use the storage capacity of the node,a in-path caching based multipath routing strategy in named data networking is proposed in the third chapter of this thesis.The popularity of different content is calculated by nodes according to the statistics in the network,and each item of the content in extended Forwarding Information Table maintains multiple available faces at the edge node.When needing to route and forward a request packet,the routing nodes forward the request according to the records in the forwarding table by choosing the most popular interface.The simulation results show that the strategy can reduce the request delay and hop count of the data to a certain extent,and improve the hit ratio of the request on the path.Because of the disadvantages of the single-path routing in transmission reliability and load balance in named data networking,which cannot use multipath efficiently to provide differentiated QoS services for different types of services.Because of the inherent support for multipath in named data networking,which can realize differentiated service for different types of services in different paths.Aiming at the above problems,the fourth chapter in this thesis proposes a multi-path routing strategy for multi-service.Based on the different QoS requirements of different types of services,this strategy selects multiple attributes,then establishes attribute matrix by multiple attribute decision making method,and realizes the updating of the attribute matrix by weighted moving average model to calculate the final decision matrix.When required to forward the request packet,the strategy will extract the value in the field of type of services,by selecting high quality transmission paths for different types of traffic according to the requirements of the service.The simulation results show that,by providing differentiated services for different businesses,the proposed strategy can effectively reduce the request delay and improve the hit ratio of the data in the network.