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Task Offloading of Intelligent Building Based on CO–HHO Algorithm in Edge Computing

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Abstract

With the rapid development of intelligent devices, the intelligence of buildings is becoming more and more obvious, which leads to the rapid growth of data generated by building users. The existing network bandwidth is far from enough for the transmission of existing data, which will lead to congestion in the process of data transmission. In this paper, a task offloading strategy based on edge computing is proposed. The edge server is deployed near the data source, which mainly solves the problems of transmission delay and energy consumption of building users during task offloading. In this paper, the mathematical model of system delay and energy consumption is established first. In order to better reflect the quality of the system, the delay and energy consumption are combined into system utility, and then the objective function is established. Since the objective function is a mixed integer nonlinear programming problem, finding the optimal solution usually requires exponential time complexity. Therefore, this paper firstly uses the Tammer decomposition method to decouple the objective function, and decomposes it into the resource allocation problem of fixed task offloading decision and the task offload problem of maximizing the objective function. Then the convex optimization (CO) theory is used to greatly reduce the complexity of the objective function and optimize the resource allocation problem. Finally, the task offloading problem is solved by the improved Harris Hawks Optimization (HHO). The paper compares various offloading schemes. The simulation results show that the CO–HHO offloading strategy based on edge computing proposed in this paper can effectively reduce the transmission delay and energy consumption of user tasks in intelligent buildings, and is superior to others in all aspects.

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Funding

National Natural Science Foundation of China, 61572416, Yi Lingzhi, Hunan province Natural science Zhuzhou United foundation,2020JJ6009, Yi Lingzhi, Postgraduate Scientific Research Innovation Project of Hunan Province, Key Laboratory Open Project Fund of Disaster Prevention and Mitigation for Power Grid Transmission and Transformation Equipment.

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Authors and Affiliations

  1. College of Automation and Electronics Information, Hunan Province Engineering Research Center for Multi-Energy Collaborative Control Technology, Xiangtan University, Xiangtan University Information Building 101, Xiangtan, Hunan, China

    Lingzhi Yi, Xieyi Gao, Xiaodong Feng, Jianxiong Huang & Qiankun Liu

  2. Zhongye Changtian International Engineering Co., LTD, Changsha, Hunan, China

    Zongpin Li

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  1. Lingzhi Yi
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  2. Xieyi Gao
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  3. Zongpin Li
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  4. Xiaodong Feng
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  5. Jianxiong Huang
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  6. Qiankun Liu
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Correspondence to Xieyi Gao.

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Yi, L., Gao, X., Li, Z. et al. Task Offloading of Intelligent Building Based on CO–HHO Algorithm in Edge Computing. J. Electr. Eng. Technol. 17, 3525–3539 (2022). https://doi.org/10.1007/s42835-022-01108-0

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  • DOI: https://doi.org/10.1007/s42835-022-01108-0

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