User Association and Path Planning for UAV-Aided Mobile Edge Computing With Energy Restriction

User Association and Path Planning for UAV-Aided Mobile Edge Computing With Energy Restriction
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具有能量限制的无人机辅助移动边缘计算的用户关联和路径规划

DOI:
10.1109/lwc.2019.2913843
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发表时间:
2019-04
影响因子:
6.3
通讯作者:
Feng Shu
Feng Shu
中科院分区:
计算机科学2区
文献类型:
--
作者:
Yuwen Qian;Feifei Wang;Jun Li;Long Shi;Kui Cai;Feng Shu

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移动边缘计算(MEC)通过从用户设备(ue)上卸载任务,在网络边缘提供计算服务。这封信采用无人驾驶飞行器(UAV)作为边缘计算服务器,从地面ue执行卸载任务。在无人机能量约束和每个终端的服务质量(QoS)约束下,我们共同优化用户关联、无人机轨迹和每个终端的上传功率,以最大限度地从所有终端向无人机卸载比特数。为了解决非凸优化问题,我们首先将其分解为三个子问题,分别用整数规划和连续凸优化方法求解。然后,我们用多变量迭代优化算法来解决整体问题。仿真结果表明,该算法比其他基准方案具有更好的性能。
Mobile edge computing (MEC) provides computational services at the edge of networks by offloading tasks from user equipments (UEs). This letter employs an unmanned aerial vehicle (UAV) as the edge computing server to execute offloaded tasks from the ground UEs. We jointly optimize user association, UAV trajectory, and uploading power of each UE to maximize sum bits offloaded from all UEs to the UAV, subject to energy constraint of the UAV and quality of service (QoS) of each UE. To address the non-convex optimization problem, we first decompose it into three subproblems that are solved with integer programming and successive convex optimization methods respectively. Then, we tackle the overall problem by the multi-variable iterative optimization algorithm. Simulations show that the proposed algorithm can achieve a better performance than other baseline schemes.
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