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On optimal proactive and retention-aware caching with user mobility
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Datalogi. (Optimisation)ORCID-id: 0000-0003-1869-6192
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Datalogi. (Optimisation)
2018 (Engelska)Ingår i: 2018 IEEE 88th Vehicular Technology Conference (VTC-Fall), IEEE, 2018Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Caching popular contents at edge devices is an effective solution to alleviate the burden of the backhaul networks. Earlier investigations commonly neglected the storage cost in caching. More recently, retention-aware caching, where both the downloading cost and storage cost are accounted for, is attracting attention. Motivated by this, we address proactive and retention-aware caching problem with the presence of user mobility, optimizing the sum of the two types of costs. More precisely, a cost-optimal caching problem for vehicle-to-vehicle networks is formulated with joint consideration of the impact of the number of vehicles, cache size, storage cost, and content request probability. This is a combinatorial optimization problem. However, we derive a stream of analytical results and they together lead to an algorithm that guarantees global optimum with polynomial-time complexity. Numerical results show significant improvements in comparison to popular caching and random caching.

Ort, förlag, år, upplaga, sidor
IEEE, 2018.
Serie
IEEE Vehicular Technology Conference Proceedings, ISSN 1550-2252
Nationell ämneskategori
Telekommunikation
Identifikatorer
URN: urn:nbn:se:uu:diva-368071DOI: 10.1109/VTCFall.2018.8691020ISI: 000468872400462ISBN: 978-1-5386-6358-5 (digital)OAI: oai:DiVA.org:uu-368071DiVA, id: diva2:1267559
Konferens
88th IEEE Vehicular Technology Conference (VTC-Fall), AUG 27-30, 2018, Chicago, IL
Tillgänglig från: 2019-04-15 Skapad: 2018-12-03 Senast uppdaterad: 2019-08-02Bibliografiskt granskad

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