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    Optimal Caching in Multicast 5G Networks with Opportunistic Spectrum Access

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    Type
    Conference Paper
    Authors
    Emara, Mostafa
    Elsawy, Hesham cc
    Sorour, Sameh
    Al-Ghadhban, Samir
    Alouini, Mohamed-Slim cc
    Al-Naffouri, Tareq Y. cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Grant Number
    KAUST-002
    Date
    2018-01-15
    Online Publication Date
    2018-01-15
    Print Publication Date
    2017-12
    Permanent link to this record
    http://hdl.handle.net/10754/627292
    
    Metadata
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    Abstract
    Cache-enabled small base station (SBS) densification is foreseen as a key component of 5G cellular networks. This architecture enables storing popular files at the network edge (i.e., SBS caches), which empowers local communication and alleviates traffic congestions at the core/backhaul network. This paper develops a mathematical framework, based on stochastic geometry, to characterize the hit probability of a cache-enabled multicast 5G network with SBS multi-channel capabilities and opportunistic spectrum access. To this end, we first derive the hit probability by characterizing opportunistic spectrum access success probabilities, service distance distributions, and coverage probabilities. The optimal caching distribution to maximize the hit probability is then computed. The performance and trade-offs of the derived optimal caching distributions are then assessed and compared with two widely employed caching distribution schemes, namely uniform and Zipf caching, through numerical results and extensive simulations. It is shown that the Zipf caching almost optimal only in scenarios with large number of available channels and large cache sizes.
    Citation
    Emara M, ElSawy H, Sorour S, Al-Ghadhban S, Alouini M-S, et al. (2017) Optimal Caching in Multicast 5G Networks with Opportunistic Spectrum Access. GLOBECOM 2017 - 2017 IEEE Global Communications Conference. Available: http://dx.doi.org/10.1109/glocom.2017.8254682.
    Sponsors
    This research was funded by a grant from the office of competitive research funding (OCRF) at the King Abdullah University of Science and Technology (KAUST). The work was also supported by the Deanship of Scientific Research (DSR) at King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia, through project number KAUST-002.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    GLOBECOM 2017 - 2017 IEEE Global Communications Conference
    DOI
    10.1109/glocom.2017.8254682
    Additional Links
    http://ieeexplore.ieee.org/document/8254682/
    ae974a485f413a2113503eed53cd6c53
    10.1109/glocom.2017.8254682
    Scopus Count
    Collections
    Conference Papers; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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