In this paper, the edge caching problem in ultra-dense fog radio access networks (F-RAN) is investigated. Taking into account time-variant user requests and ultra-dense deployment of fog access points (F-APs), we propose a dynamic distributed edge caching scheme to jointly minimize the request service delay and fronthaul traffic load. Considering the interactive relationship among F-APs, we model the caching optimization problem as a stochastic differential game (SDG) which captures the temporal dynamics of F-AP states and incorporates user requests status. The SDG is further approximated as a mean field game (MFG) by exploiting the ultra-dense property of F-RAN. In the MFG, each F-AP can optimize its caching policy independently through iteratively solving the corresponding partial differential equations without any information exchange with other F-APs. The simulation results show that the proposed edge caching scheme outperforms the baseline schemes under both static and time-variant user requests.


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    Titel :

    Distributed Edge Caching in Ultra-Dense Fog Radio Access Networks: A Mean Field Approach


    Beteiligte:
    Hu, Yabai (Autor:in) / Jiang, Yanxiang (Autor:in) / Bennis, Mehdi (Autor:in) / Zheng, Fu-Chun (Autor:in)


    Erscheinungsdatum :

    01.08.2018


    Format / Umfang :

    190448 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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