Graduate School and Research Center in Digital Sciences

Storage on wheels: Offloading popular contents through a vehicular cloud

Vigneri, Luigi; Spyropoulos, Thrasyvoulos; Barakat, Chadi

WOWMOM 2016, 7th International Symposium on a World of Wireless Mobile and Multimedia networks, 21-24 June 2016, Coimbra, Portugal

The increasing demand for mobile data is overloading the cellular infrastructure. Small cells and edge caching is being explored as an alternative, but installation and maintenance costs for sufficient coverage are significant. In this work, we perform a preliminary study of an alternative architecture based on two main ideas: (i) using vehicles as mobile caches that can be accessed by user devices; compared to small cells, vehicles are more widespread and require lower costs; (ii) combining the mobility of vehicles with delayed content access to increase the number of cache hits (and reduce the load on the infrastructure). Contrary to standard DTN-type approaches, in our system max delays are guaranteed to be kept to a few minutes (beyond this deadline, the content is fetched from the infrastructure). We first propose an analytical framework to compute the optimal number of content replicas that one should cache, in order to minimize the infrastructure load. We then investigate how to optimally refresh these caches to introduce new contents, as well as to react to the temporal variability in content popularity. Simulations suggest that our vehicular cloud considerably reduces the infrastructure load in urban settings, assuming modest penetration rates and tolerable content access delays.                    

Document Doi Hal Bibtex

Title:Storage on wheels: Offloading popular contents through a vehicular cloud
Department:Communication systems
Eurecom ref:4867
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Bibtex: @inproceedings{EURECOM+4867, doi = {}, year = {2016}, title = {{S}torage on wheels: {O}ffloading popular contents through a vehicular cloud}, author = {{V}igneri, {L}uigi and {S}pyropoulos, {T}hrasyvoulos and {B}arakat, {C}hadi}, booktitle = {{WOWMOM} 2016, 7th {I}nternational {S}ymposium on a {W}orld of {W}ireless {M}obile and {M}ultimedia networks, 21-24 {J}une 2016, {C}oimbra, {P}ortugal}, address = {{C}oimbra, {PORTUGAL}}, month = {06}, url = {} }
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