A cross-layer cooperative caching for software-defined radio access networks

Qiang Li, Wennian Shi, Tao Zhang, Tao Chen, Tao Han, Jing Zhang

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)

    Abstract

    To ease the contradiction between the explosive growth of mobile data traffic and the capacity-limited backhaul networks, content caching is considered in a software-defined radio access network (SD-RAN) in this paper. Equipped with low-cost storage units, popular contents that are frequently requested by users can be cached at both the centralized macro-cell base station (MBS) at which the main control logics are installed, and the distributed small-cell base stations (SBSs) that are mainly responsible for data transmissions. With an objective of minimizing the average content provisioning cost of SD-RAN, a storage allocation is formulated between the MBS and SBSs subjected to a sum storage constraint. Firstly, a non-cooperative caching strategy is proposed, where the MBS and SBSs cache popular contents independently. In order to better utilize the available storage for achieving more efficient caching, a cross-layer cooperative caching strategy is then proposed by leveraging the cooperation and coordination between the MBS and SBSs. Results demonstrate that the average content provisioning cost of SD-RAN can be significantly reduced by using the analytically obtained optimal storage allocation factor, and the proposed cross-layer cooperative caching always outperforms the non-cooperative caching.

    Original languageEnglish
    Title of host publication2017 IEEE/CIC International Conference on Communications in China, ICCC 2017
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages1-6
    Number of pages6
    ISBN (Electronic)978-1-5386-4502-4
    ISBN (Print)978-1-5386-4503-1
    DOIs
    Publication statusPublished - 2 Apr 2018
    MoE publication typeA4 Article in a conference publication
    Event2017 IEEE/CIC International Conference on Communications in China, ICCC 2017 - Qingdao, China
    Duration: 22 Oct 201724 Oct 2017

    Conference

    Conference2017 IEEE/CIC International Conference on Communications in China, ICCC 2017
    Country/TerritoryChina
    CityQingdao
    Period22/10/1724/10/17

    Keywords

    • content provisioning cost
    • control-data separation
    • cooperative caching
    • Software-defined radio access networks

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