Multi-Objective Caching Optimization for Wireless Backhauled Fog Radio Access Network

Bani-Bakr, Alaa; Hindia, Mohammad Nour; Dimyati, Kaharudin; Hanafi, Effariza; Izam, Tengku Faız Tengku Mohmed Noor

doi:10.3390/sym13040708

Cited by 10 publications

(10 citation statements)

References 28 publications

(71 reference statements)

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“…Proof. Bearing in mind that the delay is conditioned on the association, the probability of the event space A m can be calculated as in (28). Then, we have ( 27) by total probability theorem.…”

Section: Delay Analysismentioning

confidence: 99%

“…Bani-Bakr et al [28] showed that improving STP by the wireless backhauling of F-APs does not always minimize the delay due to the large average delays of the backhaul links. Moreover, it is noted in the previous section that EE is fundamentally influenced by STP and delay.…”

Section: Performance Optimizationmentioning

confidence: 99%

“…The joint optimization of the delay and EE in cache-enabled F-RAN was addressed by Wan et al [25], Jiang et al [26]. STP and delay are jointly optimized in [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…The authors of [7][8][9][10][11][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] did not tackle the wireless backhauling of the F-APs. The F-AP's optimal cache placement is not addressed in [12][13][14][23][24][25][26][27], the joint optimization of EE and delay is not addressed in [25,26], STP and delay optimization are performed in [25,26] for a cooperative coded caching F-RAN, and the EE is not addressed in [28]. As far as the authors know, the problem of jointly optimizing STP, EE, and delay in uncoded cache-enabled F-RAN has not been addressed before.…”

Section: Introductionmentioning

confidence: 99%

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Joint Successful Transmission Probability, Delay, and Energy Efficiency Caching Optimization in Fog Radio Access Network

et al. 2021

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The fog radio access network (F-RAN) is considered an efficient architecture for caching technology as it can support both edge and centralized caching due to the backhauling of the fog access points (F-APs). Successful transmission probability (STP), delay, and energy efficiency (EE) are key performance metrics for F-RAN. Therefore, this paper proposes a proactive cache placement scheme that jointly optimizes STP, delay, and EE in wireless backhauled cache-enabled F-RAN. First, expressions of the association probability, STP, average delay, and EE are derived using stochastic geometry tools. Then, the optimization problem is formulated to obtain the optimal cache placement that maximizes the weighted sum of STP, EE, and negative delay. To solve the optimization problem, this paper proposes the normalized cuckoo search algorithm (NCSA), which is a novel modified version of the cuckoo search algorithm (CSA). In NCSA, after generating the solutions randomly via Lévy flight and random walk, a simple bound is applied, and then the solutions are normalized to assure their feasibility. The numerical results show that the proposed joint cache placement scheme can effectively achieve significant performance improvement by up to 15% higher STP, 45% lower delay, and 350% higher EE over the well-known benchmark caching schemes.

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Section: Delay Analysismentioning

confidence: 99%

Section: Performance Optimizationmentioning

confidence: 99%

“…The joint optimization of the delay and EE in cache-enabled F-RAN was addressed by Wan et al [25], Jiang et al [26]. STP and delay are jointly optimized in [27,28].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint Successful Transmission Probability, Delay, and Energy Efficiency Caching Optimization in Fog Radio Access Network

et al. 2021

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“…In [22], the authors proposed a joint power allocation and proactive cooperative caching scheme that minimizes the latency in F-RAN. In [23], [24], the authors proposed multi-objective caching schemes for wireless backhauled F-RAN. Nevertheless, none of the aforementioned contributions considers the multicast transmission scheme.…”

Section: Introductionmentioning

confidence: 99%

Caching and Multicasting for Fog Radio Access Networks

et al. 2022

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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 closedform 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.

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Metaheuristic Algorithms for 6G wireless communications: Recent advances and applications

Abasi,

Aloqaily,

Guizani

et al. 2024

Ad Hoc Networks

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Multi-Objective Caching Optimization for Wireless Backhauled Fog Radio Access Network

Cited by 10 publications

References 28 publications

Joint Successful Transmission Probability, Delay, and Energy Efficiency Caching Optimization in Fog Radio Access Network

Joint Successful Transmission Probability, Delay, and Energy Efficiency Caching Optimization in Fog Radio Access Network

Caching and Multicasting for Fog Radio Access Networks

Metaheuristic Algorithms for 6G wireless communications: Recent advances and applications

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