Publication: The RICH Prefetching in Edge Caches for In-Order Delivery to Connected Cars
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2019-01-15
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IEEE
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Abstract
Content caching on the edge of 5G networks is an
emerging and critical feature to quench the thirst for content of
future connected cars. However, the tight packaging of 5G cells,
the finite storage capacity at the edge, and the need for content
availability while driving motivate the need to develop smart edge
caching strategies adapted to the mobility characteristics of connected cars. In this paper, we propose a scheme called RoadsIde
CacHe (RICH), which optimally caches content at edge nodes
where connected vehicles require it most. In particular, our scheme
is designed to ensure in-order delivery of content chunks to end
users. Unlike blind popularity decisions, the probabilistic caching
used by RICH accounts for the user mobility information that the
system can realistically acquire. Furthermore, we provide a complete system architecture and define the protocols through which
the different system entities can interact. We assess the performance of our approach against state-of-the-art solutions, under
realistic mobility datasets and system scenarios. Our RICH edge
caching scheme improves significantly the content availability at
the caches and reduces the required backhaul bandwidth, with
beneficial effects for both the end users and the network operators
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Keywords
Edge caching, Prefetching, Vehicular networks
Bibliographic citation
Mahmood, A., Casetti, C.E., Chiasserini, C.F, Giaccone, P. y Härri, J. (2019). The RICH Prefetching in Edge Caches for In-Order Delivery to Connected Cars. IEEE Transactions on Vehicular Technology, 68 (1), pp. 4-18