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

Wenjing Lv | Zendy; Rui Wang | Zendy; Jun Wu | Zendy; Zhijun Fang | Zendy; Songlin Cheng | Zendy

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

Author(s) -

Wenjing Lv,

Rui Wang,

Jun Wu,

Zhijun Fang,

Songlin Cheng

Publication year - 2021

Publication title -

security and communication networks

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.446

H-Index - 43

eISSN - 1939-0114

pISSN - 1939-0122

DOI - 10.1155/2021/1935453

Subject(s) - computer science , unicast , beamforming , backhaul (telecommunications) , computer network , radio access network , multicast , quality of service , base station , telecommunications , mobile station

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 l 0 -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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