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Probabilistic Caching in Wireless D2D Networks: Cache Hit Optimal Versus Throughput Optimal
University of Paris Sud, France.
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
Huawei Technology Co Ltd, France.
2017 (English)In: IEEE Communications Letters, ISSN 1089-7798, E-ISSN 1558-2558, Vol. 21, no 3, p. 584-587Article in journal (Refereed) Published
Abstract [en]

Departing from the conventional cache hit optimization in cache-enabled wireless networks, we consider an alternative optimization approach for the probabilistic caching placement in stochastic wireless D2D caching networks taking into account the reliability of D2D transmissions. Using tools from stochastic geometry, we provide a closed-form approximation of cache-aided throughput, which measures the density of successfully served requests by local device caches, and we obtain the optimal caching probabilities via numerical optimization. Compared with the cache-hit-optimal case, the optimal caching probabilities obtained by cache-aided throughput optimization show notable gain in terms of the density of successfully served user requests, particularly in dense user environments.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2017. Vol. 21, no 3, p. 584-587
Keywords [en]
Wireless D2D caching; probabilistic content placement; stochastic geometry
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:liu:diva-136616DOI: 10.1109/LCOMM.2016.2628032ISI: 000398251500035OAI: oai:DiVA.org:liu-136616DiVA, id: diva2:1089926
Note

Funding Agencies|European Unions Horizon research and innovation programme under the Marie Sklodowska-Curie Grant Agreement [642743]

Available from: 2017-04-21 Created: 2017-04-21 Last updated: 2017-05-09

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