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无人机辅助移动边缘计算系统的分析与预测

Analysis and prediction of UAV-assisted mobile edge computing systems.

作者信息

Wang Xiong, Yang Zhijun, Ding Hongwei, Guan Zheng

机构信息

School of Information Science and Engineering, Yunnan University, Kunming, China.

Educational Instruments and Facilities Service Center, Educational Department of Yunnan Province, Kunming, China.

出版信息

Math Biosci Eng. 2023 Nov 30;20(12):21267-21291. doi: 10.3934/mbe.2023941.

DOI:10.3934/mbe.2023941
PMID:38124597
Abstract

As the demand for the internet of things (IoT) continues to grow, there is an increasing need for low-latency networks. Mobile edge computing (MEC) provides a solution to reduce latency by offloading computational tasks to edge servers. However, this study primarily focuses on the integration of back propagation (BP) neural networks into the realm of MEC, aiming to address intricate network challenges. Our innovation lies in the fusion of BP neural networks with MEC, particularly for optimizing task scheduling and processing. Firstly, we introduce a drone-assisted MEC model that categorizes computation offloading into synchronous and asynchronous modes based on task scheduling. Secondly, we employ Markov chains and probability-generation functions to accurately compute parameters such as average queue length, cycle time, throughput, and average delay in the synchronous mode. We also derive the first and second-order derivatives of the probability-generation function to support these computations. Finally, we establish a BP neural network to solve for the average queue length and latency in the asynchronous mode. Our results from the BP neural network closely align with the theoretical values obtained through the probability-generation function, demonstrating the effectiveness of our approach. Additionally, our proposed UAV-assisted MEC model outperforms the synchronous mode. Overall, our MEC scheduling approach significantly reduces latency, enhances speed, and improves throughput, with our model reducing latency by approximately 11.72$ % $ and queue length by around 9.45$ % $.

摘要

随着物联网(IoT)需求的持续增长,对低延迟网络的需求也日益增加。移动边缘计算(MEC)通过将计算任务卸载到边缘服务器来提供降低延迟的解决方案。然而,本研究主要关注将反向传播(BP)神经网络集成到MEC领域,旨在解决复杂的网络挑战。我们的创新在于将BP神经网络与MEC融合,特别是用于优化任务调度和处理。首先,我们引入了一种无人机辅助的MEC模型,该模型根据任务调度将计算卸载分为同步和异步模式。其次,我们采用马尔可夫链和概率生成函数来精确计算同步模式下的平均队列长度、循环时间、吞吐量和平均延迟等参数。我们还推导了概率生成函数的一阶和二阶导数以支持这些计算。最后,我们建立了一个BP神经网络来求解异步模式下的平均队列长度和延迟。我们从BP神经网络得到的结果与通过概率生成函数获得的理论值紧密吻合,证明了我们方法的有效性。此外,我们提出的无人机辅助MEC模型优于同步模式。总体而言,我们的MEC调度方法显著降低了延迟,提高了速度并改善了吞吐量,我们的模型将延迟降低了约11.72%,队列长度降低了约9.45%。

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