Vehicular users are expected to consume large amounts of data, for both entertainment and navigation purposes. This will put a strain on cellular networks, which will be able to cope with such a load only if proper caching is in place; this in turn begs the question of which caching architecture is the best-suited to deal with vehicular content consumption. In this paper, we leverage a large-scale, crowd-sourced trace to (i) characterize the vehicular traffic demand, in terms of overall magnitude and content breakup; (ii) assess how different caching approaches perform against such a real-world load; (iii) study the effect of recommendation systems and local content items. We define a price-of-fog metric, expressing the additional caching capacity to deploy when moving from traditional, centralized caching architectures to a "fog computing" approach, where caches are closer to the network edge. We find that for location-specific items, such as the ones that vehicular users are most likely to request, such a price almost disappears. Vehicular networks thus make a strong case for the adoption of mobile-edge caching, as we are able to reap the benefit thereof - including a reduction in the distance travelled by data, within the core network - with little or none of the associated disadvantages.
The Price of Fog: a Data-Driven Study on Caching Architectures in Vehicular Networks / Malandrino, Francesco; Chiasserini, Carla Fabiana; Kirkpatrick, Scott. - STAMPA. - (2016), pp. 37-42. (Intervento presentato al convegno ACM MobiHoc Workshop on Internet of Vehicles and Vehicles of Internet (IoV-VoI 2016) tenutosi a Paderborn (Germany) nel 5 July, 2016) [10.1145/2938681.2938682].
The Price of Fog: a Data-Driven Study on Caching Architectures in Vehicular Networks
MALANDRINO, FRANCESCO;CHIASSERINI, Carla Fabiana;
2016
Abstract
Vehicular users are expected to consume large amounts of data, for both entertainment and navigation purposes. This will put a strain on cellular networks, which will be able to cope with such a load only if proper caching is in place; this in turn begs the question of which caching architecture is the best-suited to deal with vehicular content consumption. In this paper, we leverage a large-scale, crowd-sourced trace to (i) characterize the vehicular traffic demand, in terms of overall magnitude and content breakup; (ii) assess how different caching approaches perform against such a real-world load; (iii) study the effect of recommendation systems and local content items. We define a price-of-fog metric, expressing the additional caching capacity to deploy when moving from traditional, centralized caching architectures to a "fog computing" approach, where caches are closer to the network edge. We find that for location-specific items, such as the ones that vehicular users are most likely to request, such a price almost disappears. Vehicular networks thus make a strong case for the adoption of mobile-edge caching, as we are able to reap the benefit thereof - including a reduction in the distance travelled by data, within the core network - with little or none of the associated disadvantages.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2642711
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