Collaborative caching strategy based on node cache hit rate and edge priority in ICN

• 1、School of Information and Communication Engineering，Bejing University of Post and Telecommunication，Beijing Key Laboratory of Network System Architecture and Convergence, Beijing, 100876

Abstract：Aiming at the optimal placement of the cached content of the routing node in the information center network (ICN), an edge-priority caching strategy based on the routing node cache hit ratio and content popularity is proposed. This strategy first considers the cache overload of the core node, the large pressure of decision-making, and the large difference in cache efficiency between nodes. Furthermore, according to the cache hit rate and the popularity of the content, the cache decision time is advanced to the interest packet forwarding process. Reducing the core node of the cache decision pressure, reducing the decision based on the data returned by the node state of the different errors. At the same time can achieve edge-priority strategy, in general, reduce the user access to data delay, improved the user experience. The cache strategy reduces the average number of hops of the content request, improves the cache hit rate, improves the utilization rate of the storage resource with a small amount of inter-node interaction data, and obtains the performance improvement of the cache system as a whole. Strategy is better than existing strategy.

Keywords： Communication Technology information center network cache decision collaboration edge first