| In recent years,with the rapid development of the Internet and the popularity of mobile devices,the main traffic and computing methods in the network are changing.As a result,the current IP-centric architecture of the traditional Internet will not be able to meet the needs of today’s users,so it is necessary to make changes to the network architecture.In this context,a content-centric naming data network architecture emerged as the times require.NDN differs from traditional Internet in that it unbinds addresses from content by name.Among them,routing and forwarding strategy is one of the key technologies in NDN.Routing and forwarding planes are separated from each other.The routing plane is responsible for generating routing information,and the specific forwarding interface is determined by the forwarding plane,which determines the rate of data transmission.Therefore,this paper takes forwarding strategies as the main research aspect to analyze the data transmission efficiency indicators under each forwarding strategy.The main work of this paper are as follows:1.A Forwarding Policy Based on interface state is presented.In this scheme,the factors affecting the interface state are objectively weighted by the entropy weight method.The interface state is weighted by each interface property obtained.Then,the probability of each interface in the node for forwarding is calculated by combining the interface state with the network static forwarding performance.Finally,an interface forwarding interest packet is selected based on the probability of the improved roulette algorithm.2.A forwarding strategy based on temporary forwarding table is presented.In this scheme,the network structure is first abstracted as a graph,on which the model and temporary forwarding table are built.Based on the temporary forwarding table,the interface for forwarding is selected through the inverse transformation sampling algorithm and subsequent feedback is obtained.Finally,the quality of service is calculated based on feedback and the forwarding table is updated to achieve highquality and efficient forwarding.3.Through the ndn SIM simulation platform for simulation experiments,the two schemes are validated by choosing the more classical and mainstream transfer strategies as the comparison.The simulation results show that the above two schemes have certain advantages in reducing network delay and increasing throughput.And the second scheme has better performance in terms of enjoying the hit rate of fun packs and improving the quality of service. |
