Аспекты кэширования в информационно-ориентированных сетях
The article is devoted to the issues of caching in information-centric networks (ICN), aimed at addressing by the content name and separating information from its producer node. Intra-network caching is one of the main features of ICN, turning them, in fact, into a network of interconnected caches that can accumulate packets in the buffer of intermediate routers, and also bring them closer to the consumer using a peripheral cache. The effectiveness of such a system depends on many factors discussed in the article: the law of popularity and the content replication strategy, the size and policy of cache eviction. Based on Che's approximation, the article presents a transition from the analysis of a single cache with the LRU (Least Recently Used) eviction policy to the analysis of a network of caches. For the strategy of content replication on a peripheral router, an original algorithm is presented that allows you to effectively store popular content in the cache, and surpasses the traditional LCE approach in several metrics (cache hit, delay, etc.). The simulation of the operation of such an algorithm for a car network scenario was carried out in the ndnSIM network simulator.