The name resolution system is responsible for storing the mapping between names and addresses,and providing name resolu-tion services in ICN.Hierarchical resolution systems are of interest because of good scalability,but requests need to be forwarded along the hierarchical structure over long distances.The problem of long resolution latency is exacerbated when only a few nodes store popular records.Replica strategy is an important mechanism to improve name resolution performance.Typically,a resolution node pushes its records to other nodes,but this strategy often fails to accurately push the names that users are most interested in,and it is also difficult to control the number of replicas.In this paper,we propose a two-level node collaborative replica strategy.After obtaining the names that are most interesting to users within the scope of the service,the high-level nodes will actively request replicas from other nodes and distribute them to the low-level nodes on the marginal benefits of placing each replica.Ultimately,the policy adaptively decides the number and location of replicas for different names.Experimental results show that our policy accurately captures user's preference,effectively improves the resolution hit rate in the management domain,and reduces resolution time by 34.1％.
name resolution systemICNreplica strategylatencynode collaboration
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