Research On The Node Mobility Management In Name Data Network

As a new type of Internet architecture,the information centric network,which is centered in information and content items,is the most likely architecture to solve the problems existing in the scalability,mobility,and security of the current IP address-centric architecture.Since its introduction,the basic idea of the information centric networks has been widely recognized by the academic community and the industry.It has quickly become a hot topic in the research of the Internet architecture.In the research of many information-centric network projects,the Named Data Networks(NDN)has advantages in the design of flexible routing strategy and the security mechanism.It stands out in several projects of the information centric network and gradually becomes the mainstream of information centric network research.With the advent of more and more mobile scenarios in network applications,research on the mobility support of NDN has become one of the hot topics in NDN.This paper focuses on the mobility management of NDN nodes.Firstly,it explains the mobility support strategy in the current NDN system in detail.Then,it analyzes the basic communication principles of NDN,the basic structure of simulation platform ndnSIM and the node's mobile model.Further,this paper proposes a probabilistic routing algorithm that can support the movement of content provider.When the content provider moves under the self-similar mobile model,the algorithm can proactively detect the path seeking information sent by the mobile node,and predict the position of the mobile node(content provider)using the historical information.Thereby,it can reduce the overhead of updating the routing information table FIB due to frequent maintenance of the node movement,and the round-trip delay,and improve the data packet transmission efficiency of the entire network,in the scenario in which the content provider moves.In order to verify the effectiveness of the probability routing algorithm proposed in this paper,a simulation scenario with fixed nodes and mobile nodes is built on the NDN simulation platform ndnSIM.A mobile model,the self-similar minimum behavior walking(SLAW)model,closed to human activities is adopted to simulate the mobility scenario.Comparing with the improved Flooding algorithm,the experimental results show that the method can predict the forwarding interface by probability and effectively increase the delivery rate of data packets,reduce the round-trip delay of data requests,and improve the data packet transmission efficiency.