Graduate School and Research Center in Digital Sciences

Streaming content from a vehicular Cloud

Vigneri, Luigi; Spyropoulos, Thrasyvoulos; Barakat, Chadi

CHANTS 2016, 11th ACM Workshop on Challenged Networks, co-located with ACM MobiCom 2016, 7 October 2016, New-York, USA

Network densi cation via small cells is considered as a key step to cope with the data tsunami. Caching data at small cells or even user devices is also considered as a promising way to alleviate the backhaul congestion this densi cation might cause. However, the former su ers from high deployment and maintenance costs, and the latter from limited resources and privacy issues with user devices. We argue that an architecture with (public or private) vehicles acting as mobile caches and communication relays might be a promising middle ground. In this paper, we assume such a vehicular cloud is in place to provide video streaming to users, and that the operator can decide which content to store in the vehicle caches. Users can then greedily ll their playout bu er with video pieces of the streamed content from encountered vehicles, and turn to the infrastructure immediately when the playout bu er is empty, to ensure uninterrupted streaming. Our main contribution is to model the playout bu er in the user device with a queuing approach, and to provide a mathematical formulation for the idle periods of this bu er, which relate to the bytes downloaded from the cellular infrastructure. We also solve the resulting content allocation problem, and perform trace-based simulations to nally show that up to 50% of the original trac could be ooaded from the main infrastructure.

Document Doi Hal Bibtex

Title:Streaming content from a vehicular Cloud
Keywords:Caching; Opportunistic networks; Vehicular networks; Mo- bile data ooading; Multimedia Streaming; Optimization
Department:Communication systems
Eurecom ref:4977
Copyright: © ACM, 2016. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in CHANTS 2016, 11th ACM Workshop on Challenged Networks, co-located with ACM MobiCom 2016, 7 October 2016, New-York, USA
Bibtex: @inproceedings{EURECOM+4977, doi = {}, year = {2016}, title = {{S}treaming content from a vehicular {C}loud}, author = {{V}igneri, {L}uigi and {S}pyropoulos, {T}hrasyvoulos and {B}arakat, {C}hadi}, booktitle = {{CHANTS} 2016, 11th {ACM} {W}orkshop on {C}hallenged {N}etworks, co-located with {ACM} {M}obi{C}om 2016, 7 {O}ctober 2016, {N}ew-{Y}ork, {USA} }, address = {{N}ew-{Y}ork, {UNITED} {STATES}}, month = {10}, url = {} }
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