Caching and multicasting for fog radio access networks

Bani-Bakr, Alaa and Reyad Hindia, Mhd Nour and Dimyati, Kaharudin and Zawawi, Zati Bayani and Tengku Mohmed Noor Izam, Tengku Faiz (2022) Caching and multicasting for fog radio access networks. IEEE Access, 10. pp. 1823-1838. ISSN 2169-3536, DOI

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Cache-enabled Fog radio access network (F-RAN) is a promising technology to alleviate the traffic congestion and boost the contents delivery success rate. The efficiency of disseminating the cached contents in F-RAN can be boosted by enabling multicast service at the fog access points (F-APs). This paper proposes a joint random caching and multicasting optimization scheme for wireless backhauled F-RAN. Using tools from stochastic geometry, the expression of the successful transmission probability (STP) is derived by carefully analyzing the different types of serving F-APs and interferers. Then, a closed-form expression of the asymptotic STP in the high SNR region is derived to reduce the complexity. The joint caching and multicasting optimization problem is formulated to maximize the STP. The optimization problem is complex and non-convex in general. A novel projected cuckoo search algorithm (PCSA) is proposed to obtain the optimal content placement that maximizes the STP. The numerical simulation results show that PCSA outperforms the original cuckoo search algorithm (CSA) and the proposed asymptotically joint caching and multicasting scheme outperforms the benchmark caching schemes by up to 15% higher STPs.

Item Type: Article
Funders: Fundamental Research Grant Scheme (FRGS) [FRGS/1/2020/TK0/UM/02/39 (FP19-2020)]
Uncontrolled Keywords: Optimization; Multicast communication; Signal to noise ratio; Interference; Wireless communication; Delays; Rayleigh channels; Backhaul; caching; Cuckoo search algorithm; F-RAN; Optimization; Multicast; Stochastic geometry
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Aug 2022 01:03
Last Modified: 02 Aug 2022 01:03

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