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Dijkstra algorithm based cooperative caching strategy for UAV-assisted edge computing system

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Abstract

Recently, the unmanned aerial vehicle (UAV)-assisted edge computing is proposed to improve the quality of service in some scenarios within sparse or unavailable base stations (BSs). Meanwhile, the caching technology is adopted to reduce the wireless traffic load and the data transmission delay. However, due to the limited storage capacity of edge nodes, the edge nodes cannot store all of the contents required by user equipment (UE). So, how to select the reasonable contents for caching on edge nodes to reduce the content delivery delay becomes a challenge in the UAV-assisted edge computing environment. In this paper, the Dijkstra algorithm based cooperative caching strategy for UAV-assisted edge computing system is proposed. Specially, the content transmission delay between two nodes is computed. Then, for each requested content, the weighted edge-undirected graph (WEUG), in which one vertex represents one node, is built. Furthermore, Dijkstra algorithm is adopted to achieve the minimal content transmission delay from the edge node caching the requested content to UE. Finally, the optimization problem of content caching is built, and the corresponding cache strategy is achieved by solving the optimization problem. The experimental results imply that the proposed cooperative caching algorithm can achieve better performance on the average content transmission delay, the average cache hit rate, and the total of hops, respectively, comparing with the benchmark algorithms.

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Acknowledgments

This work was supported by the project of science and technology of the Henan province (No. 232102210117) and the Natural Science Fund of Hubei Province, China (No. 2023AFB082).

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Authors and Affiliations

  1. School of International Education, HuangHuai University, Zhumadian, 463000, China

    Jing Zhang

  2. School of Computer Science, Yangtze University, Jingzhou, 430023, China

    Jing Zhang & Jingpan Bai

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Correspondence to Jingpan Bai.

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Zhang, J., Bai, J. Dijkstra algorithm based cooperative caching strategy for UAV-assisted edge computing system. Wireless Netw 30, 1201–1219 (2024). https://doi.org/10.1007/s11276-023-03551-x

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