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Video is one of the main causes of the dramatic increase in data traffic over cellular networks. Caching is an effective mechanism that decreases the download rate from base stations and, as a result, the load on the base station, by storing the most popular files or videos on the caches and providing them to the users. The problem of efficient content placement on the caches is known as an NP-complete problem. In this paper, the authors study the role of network coding by increasing the amount of available data to the users through the cache nodes. They propose a network coding-based content placement method, and they compare it to the best uncoded content placement and the best triangular network coding strategies.
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