A memory and file size-aware caching (MFC) scheme is proposed and studied in a D2D-enabled small cell network operating in millimeter wave bands. The proposed MFC scheme is characterized by the parameters of the file size distribution which are assumed to be Pareto distributed based on existing studies. The MFC scheme incorporates a memory allocation protocol where memory blocks are reserved for files based on the user requests, the Pareto file size distribution, and the available memory capacity. Analytical expressions for the cache hit probability and the cache-layer throughput are derived under the proposed MFC scheme. The results show that the MFC scheme achieves up to 33% increase in the cache hit probability of the cellular tier when compared to the state-of-the-art geographic and popularity-based caching schemes. Lastly, insights are provided on the impact of concurrent D2D and cellular transmissions on the cache-layer throughput.
Performance of Memory and File Size-Aware Caching in D2D-enabled Small Cell HetNets
2020-11-01
866201 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch