Joint Design of Beamforming and Edge Caching in Fog Radio Access Networks

In this paper, we study a novel transmission framework based on statistical channel state information (SCSI) by incorporating edge caching and beamforming in a fog radio access network (F-RAN) architecture. By optimizing the statistical beamforming and edge caching, we formulate a comprehensive nonc...

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Bibliographic Details
Published inSecurity and communication networks Vol. 2021; pp. 1 - 8
Main Authors Lv, Wenjing, Wang, Rui, Wu, Jun, Fang, Zhijun, Cheng, Songlin
Format Journal Article
LanguageEnglish
Published London Hindawi 18.09.2021
John Wiley & Sons, Inc
Subjects
Algorithms
Approximation
Beamforming
Caching
Optimization
Series expansion
Taylor series
Wireless networks
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Summary:In this paper, we study a novel transmission framework based on statistical channel state information (SCSI) by incorporating edge caching and beamforming in a fog radio access network (F-RAN) architecture. By optimizing the statistical beamforming and edge caching, we formulate a comprehensive nonconvex optimization problem to minimize the backhaul cost subject to the BS transmission power, limited caching capacity, and quality-of-service (QoS) constraints. By approximating the problem using the l0-norm, Taylor series expansion, and other processing techniques, we provide a tailored second-order cone programming (SOCP) algorithm for the unicast transmission scenario and a successive linear approximation (SLA) algorithm for the joint unicast and multicast transmission scenario. This is the first attempt at the joint design of statistical beamforming and edge caching based on SCSI under the F-RAN architecture.
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ISSN:1939-0114
1939-0122
DOI:10.1155/2021/1935453