Research On Cache Optimization Technology In Named Data Networking

With the advent of the traffic era and the new iteration of network technology,IP addresses in the Internet have become scarce as the number of users grows.At the same time,the form of Internet distribution has gradually shifted from end-to-end communication between hosts to streaming services.Therefore,Internet applications have also become more content-centric in the form of forwarding.In response to such a trend,named data networking architecture is proposed.In NDN network,requests and responses for data are identified by content name prefixes,and their forwarding uses the names of the content to address them in the path of transmission.Each router node has the function of caching data,and if a request is hit at an intermediate routing node,it is responded directly without being forwarded to the content server,which reduces the time delay for users to obtain content data and improves network performance.Nowadays,the caching technology of NDN is gradually gaining more attention.Currently,the default caching policy of named data network is LCE,and the returned data will be cached in every routing node that passes through,which will reduce the diversity of cached data in the network routing nodes and lead to frequent replacement of cached data contents,which reduces the diversity of cached data and its network performance in NDN network.In this paper,we address the above issues and our main work is as follows:1.proposes a study of distributed caching based on association rules in named data networking,using network coding techniques to encode the data messages passing through each node,placing random linear coding coefficients in the packet header to transmit packets in parallel from multiple nodes,by collecting the coding blocks provided by each link and decoding them to return the data needed by the user.Also the association rule policy used in each router node can well manage the cached coding blocks in the node so as to cache the more popular contents.The experimental results show that the association rule-based distributed caching can effectively improve the performance of the data content transmitted by the network and effectively alleviate the problem of interest flooding in traditional NDN.2.A content feature-based cache replacement strategy is proposed to achieve efficient cache replacement in Named Data Networking(NDN).Let each routing node in the network link individually evaluate the cache value of the data content,so as to complete the replacement of the target data content.Simulation results show that the strategy can effectively improve cache hit rate,increase cache resource utilization,reduce energy consumption,and decrease content acquisition hit distance compared to the traditional NDN cache replacement strategy.