《计算机应用》唯一官方网站 ›› 2022, Vol. 42 ›› Issue (5): 1538-1546.DOI: 10.11772/j.issn.1001-9081.2021030458

• 网络与通信 • 上一篇    下一篇

基于终端直通通信的多用户计算卸载资源优化决策

李余1,2(), 何希平1,2, 唐亮贵1,2   

  1. 1.重庆工商大学 计算机科学与信息工程学院, 重庆 400067
    2.重庆市检测控制集成系统工程实验室(重庆工商大学), 重庆 400067
  • 收稿日期:2021-03-25 修回日期:2021-06-30 接受日期:2021-07-01 发布日期:2022-06-11 出版日期:2022-05-10
  • 通讯作者: 李余
  • 作者简介:李余(1989—),女,重庆人,副教授,博士,主要研究方向:终端直通通信、移动边缘计算、资源优化 liyu@ctbu.edu.cn
    何希平(1968—),男,四川射洪人,教授,博士,主要研究方向:机器学习、数据分析处理、计算机视觉
    唐亮贵(1973—),男,重庆人,副教授,博士,CCF会员,主要研究方向:分布式智能计算、网络计算。
  • 基金资助:
    国家自然科学基金资助项目(61901067);重庆市自然科学基金资助项目(cstc2020jcyj?msxmX0339);重庆市教育委员会科学技术研究项目(KJQN201900824);重庆工商大学科研项目(1952002)

Multi-user computation offloading and resource optimization policy based on device-to-device communication

Yu LI1,2(), Xiping HE1,2, Lianggui TANG1,2   

  1. 1.School of Computer Science and Information Engineering,Chongqing Technology and Business University,Chongqing 400067,China
    2.Chongqing Engineering Laboratory for Detection,Control and Integrated System (Chongqing Technology and Business University),Chongqing 400067,China
  • Received:2021-03-25 Revised:2021-06-30 Accepted:2021-07-01 Online:2022-06-11 Published:2022-05-10
  • Contact: Yu LI
  • About author:LI Yu, born in 1989,Ph. D.,associate professor. Her researchinterests include device-to-device communication, mobile edge computing,resource optimization.
    HE Xiping, Xiping,born in 1968,Ph. D.,professor. His research interests include machine learning,data analysis and processing,computer vision.
    TANG Lianggui, born in 1973,Ph. D.,associate professor. Hisresearch interests include distributed intelligent computing, network computing.
  • Supported by:
    National Natural Science Foundation of China(61901067);Natural Science Foundation of Chongqing(cstc2020jcyj-msxmX0339);Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201900824);Science Research Program of Chongqing Technology and Business University(1952002)

摘要:

随着计算密集和时延敏感类应用的激增,移动边缘计算(MEC)被提出应用在网络边缘为用户提供计算服务。针对基站(BS)端边缘服务器计算资源有限以及网络边缘用户远距离计算卸载的时延较长等问题,提出了基于终端直通(D2D)通信的多用户计算卸载资源优化决策,将D2D融入MEC网络使用户以D2D方式直接卸载任务到相邻用户处执行,从而能够进一步降低卸载时延和能耗。首先,以最小化包括时延和能耗的系统计算总开销为优化目标,建模多用户计算卸载和多用户计算资源分配的联合优化问题;然后,将求解该问题看作是一个D2D配对过程,并提出基于稳定匹配的低复杂度的多用户计算卸载资源优化决策算法;最后,迭代求解D2D卸载的优化分配决策。通过理论证明分析了所提算法的稳定性、最优性和复杂度等特性。仿真结果表明,所提算法相较于随机匹配算法能够有效降低10%~33%的系统计算总开销,并且其性能非常接近最优的穷举搜索算法。可见,所提基于D2D卸载的决策有利于改善时延和能耗开销性能。

关键词: 移动边缘计算, 终端直通通信, 计算卸载, 资源分配, 稳定匹配

Abstract:

With the significant increase of computation-intensive and latency-intensive applications, Mobile-Edge Computing (MEC) was proposed to provide computing services for users at the network edge. In view of the limited computing resources of edge servers at the Base Stations (BSs) and the long latency of long-distance computation offloading of users at the network edge, a multi-user computation offloading and resource optimization policy based on Device-to-Device (D2D) communication was proposed. The D2D was integrated into MEC network to directly offload tasks to neighbor users for executing in D2D mode, which was able to further reduce offloading latency and energy consumption. Firstly, the joint optimization problem of multi-user computation offloading and multi-user computing resource allocation was modelled with the optimization objective of minimizing the total system computing cost including latency and energy consumption. Then, the solution of this problem was considered as a D2D pairing process, and the multi-user computation offloading and resource optimization policy algorithm was proposed based on stable matching. Finally, the optimization allocation policy of D2D offloading was solved iteratively. The characteristics such as stability, optimality and complexity of the proposed algorithm were analyzed by theoretical proof. Simulation results show that, the proposed algorithm can effectively reduce the total system computing cost by 10%-30% compared with the random matching algorithm, and the performance of the proposed algorithm is very close to the optimal exhaustive search algorithm, indicating that the proposed policy based on D2D offloading is helpful to improve latency and energy consumption performance.

Key words: Mobile Edge Computing (MEC), Device-to-Device (D2D) communication, computation offloading, resource allocation, stable matching

中图分类号: