《计算机应用》唯一官方网站 ›› 2022, Vol. 42 ›› Issue (8): 2501-2510.DOI: 10.11772/j.issn.1001-9081.2021060901

• 先进计算 • 上一篇    

协同移动边缘计算分层资源配置机制

王界钦, 林士飏(), 彭世明, 贾硕, 杨苗会   

  1. 山东理工大学 交通与车辆工程学院,山东 淄博 255000
  • 收稿日期:2021-06-03 修回日期:2021-09-14 接受日期:2021-09-24 发布日期:2021-12-27 出版日期:2022-08-10
  • 通讯作者: 林士飏
  • 作者简介:王界钦(1997—),男,山东济宁人,硕士研究生,主要研究方向:移动/多接入边缘计算、任务卸载;
    林士飏(1979—),男,台湾新北人,副教授,博士,主要研究方向:移动/多接入边缘计算、5G NR-V2X通信;
    彭世明(1997—),男,福建厦门人,硕士研究生,主要研究方向:移动/多接入边缘计算、任务卸载;
    贾硕(1999—),男,山东菏泽人,硕士研究生,主要研究方向:移动/多接入边缘计算;
    杨苗会(1998—),女,山东菏泽人,硕士研究生,主要研究方向:移动/多接入边缘计算。

Hierarchical resource allocation mechanism of cooperative mobile edge computing

Jieqin WANG, Shihyang LIN(), Shiming PENG, Shuo JIA, Miaohui YANG   

  1. School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo Shandong 255000,China
  • Received:2021-06-03 Revised:2021-09-14 Accepted:2021-09-24 Online:2021-12-27 Published:2022-08-10
  • Contact: Shihyang LIN
  • About author:WANG Jieqin, born in 1997, M. S. candidate. His research interests include mobile/multi-access edge computing, task offloading.
    LIN Shihyang, born in 1979, Ph. D., associate professor. His research interests include mobile/multi-access edge computing, 5G NR-V2X communications.
    PENG Shiming, born in 1997, M. S. candidate. His research interests include mobile/multi-access edge computing, task offloading.
    JIA Shuo, born in 1999, M. S. candidate. His research interests include mobile/multi-access edge computing.
    YANG Miaohui, born in 1998, M. S. candidate. Her research interests include mobile/multi-access edge computing.

摘要:

针对车联网(IoV)中存在大量的车辆卸载任务计算需求,而本地端边缘服务器运算能力有限的问题,提出一种移动边缘计算分层协同资源配置机制(HRAM)。所提算法以多层式的架构合理分配与有效利用移动边缘计算(MEC)服务器的运算资源,减少不同MEC服务器之间的数据多跳转发时延,并优化卸载任务请求时延。首先构建IoV边缘计算系统模型、通信模型、决策模型和计算模型;然后利用层次分析法(AHP)进行多因素综合考虑以确定卸载任务迁移的目标服务器;最后提出动态权值的任务路由策略,调用整体网络的通信能力以缩短卸载任务的请求时延。仿真实验结果表明,HRAM算法相较于任务卸载单层式资源分配(RATAOS)算法和任务卸载多层式资源分配(RATOM)算法,分别降低了40.16%和19.01%的卸载任务请求时延;且所提算法在满足卸载任务最大可容忍时延的前提下,能够满足更多卸载任务的计算需求。

关键词: 移动边缘计算, 车联网, 任务卸载, 资源配置, 多跳转发

Abstract:

Concerning the large number of computing needs of vehicle task offloading and the limited computing capacity of local edge servers in the Internet of Vehicles (IoV), a Hierarchical Resource Allocation Mechanism of cooperative mobile edge computing (HRAM) was proposed. In this algorithm, the computing resources of Mobile Edge Computing (MEC) servers were reasonably allocated and effectively utilized with a multi-layer architecture,so that the data multi-hop forwarding delay between different MEC servers was reduced, and the delay of task offloading requests was optimized. Firstly, the system model, communication model, decision model, and calculation model of the IoV edge computing were built. Next, the Analytic Hierarchy Process (AHP) was used to comprehensively consider multiple factors to determine the target server the offloaded task transferred to. Finally, a task routing strategy with dynamic weights was proposed to make use of communication capabilities of the overall network to shorten the request delay of task offloading. Simulation results show that compared with Resource Allocation of Task Offloading in Single-hop (RATOS) algorithm and Resource Allocation of Task Offloading in Multi-hop (RATOM) algorithm, HRAM algorithm reduces the request delay of task offloading by 40.16% and 19.01% respectively, and this algorithm can satisfy the computing needs of more offloaded tasks under the premise of meeting the maximum tolerable delay.

Key words: Mobile Edge Computing (MEC), Internet of Vehicles (IoV), task offloading, resource allocation, multi-hop forwarding

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