Research On Forwarding Strategy In Named Data Networking

Due to the rapid spread of the Internet and its multifaceted applications,the current Internet is no longer able to meet the current demand for information content service oriented applications.The current Internet is more concerned with “what” is the content than “where” is the content.Moreover,due to the problems in scalability,flexibility,security and mobility of TCP/IP,the future network architecture has started to gain attention.Named Data Networking is multi-source and multi-path,and related strategies can reduce request latency while enhancing consumers' ability to access data.In addition,Named Data Network also supports data caching in the nodes,making it is easy for consumers to get a copy of the content close to them.In order to further improve the quality of services,the following research was conducted in this thesis.1.A probabilistic forwarding strategy based on the interface selection method is proposed to address the problem that the quality of service cannot be guaranteed when the traditional strategy performs single-path forwarding of interest packets.Considering the load and delay of the link,the network state of the corresponding path of the interface is measured.In order to improve the ability of data acquisition,the satisfaction rate of the interface and the time of data packet acquisition are considered.Considering the network congestion,the forwarding probability formula of the interface is obtained.Simulation results show that the proposed strategy has certain advantages in terms of average hit rate,average request delay,and average hop reduction rate compared with existing schemes.2.To address the problems that single-path forwarding cannot fully utilize potential neighboring cache resources and multi-path forwarding are prone to traffic redundancy,a forwarding strategy based on neighboring replica notification is proposed.A cache node notifies the surrounding nodes about its stored data,and the surrounding nodes establish a priority forwarding table after receiving the notification information.Nodes first forward packets of interest according to the priority forwarding table entries,Simulation results show that the proposed strategy reduces the request delay and hop count and improves the hit rate compared with existing schemes.