首页|UAV-assisted cooperative offloading energy efficiency system for mobile edge computing

UAV-assisted cooperative offloading energy efficiency system for mobile edge computing

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Reliable communication and intensive computing power cannot be provided effectively by temporary hot spots in disaster areas and complex terrain ground infrastructure.Mitigating this has greatly developed the application and integration of UAV and Mobile Edge Computing(MEC)to the Internet of Things(IoT).However,problems such as multi-user and huge data flow in large areas,which contradict the reality that a single UAV is constrained by limited computing power,still exist.Due to allowing UAV collaboration to accomplish complex tasks,coop-erative task offloading between multiple UAVs must meet the interdependence of tasks and realize parallel processing,which reduces the computing power consumption and endurance pressure of terminals.Considering the computing requirements of the user terminal,delay constraint of a computing task,energy constraint,and safe distance of UAV,we constructed a UAV-Assisted cooperative offloading energy efficiency system for mobile edge computing to minimize user terminal energy consumption.However,the resulting optimization problem is originally nonconvex and thus,difficult to solve optimally.To tackle this problem,we developed an energy ef-ficiency optimization algorithm using Block Coordinate Descent(BCD)that decomposes the problem into three convex subproblems.Furthermore,we jointly optimized the number of local computing tasks,number of computing offloaded tasks,trajectories of UAV,and offloading matching relationship between multi-UAVs and multiuser terminals.Simulation results show that the proposed approach is suitable for different channel con-ditions and significantly saves the user terminal energy consumption compared with other benchmark schemes.

Computation offloadingInternet of things(IoT)Mobile edge computing(MEC)Block coordinate descent(BCD)

Xue-Yong Yu、Wen-Jin Niu、Ye Zhu、Hong-Bo Zhu

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Jiangsu Key Laboratory of Wireless Communications,Nanjing University of Posts and Telecommunications Nanjing 210003,China

Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks,Ministry of Education,Nanjing University of Posts and Telecommunications Nanjing 210003,China

Jiangsu Provincial Key Research and Development Program国家自然科学基金国家自然科学基金Open Research Fund of Jiangsu Key Laboratory of Wireless CommunicationsNatural Science Foundation of Nanjing University of Posts and Telecommunications

BE2020084-49206720161871446710020017002NY220047

2024

10.1016/j.dcan.2022.03.005

数字通信与网络(英文)

数字通信与网络(英文)

ISSN：
年,卷(期)：2024.10(1)
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