Task Offloading Based on Lyapunov Optimization for MEC-Assisted Vehicular Platooning Networks
1
School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Nan-An District, Chongqing 400065, China
2
Chongqing Key Labs of Mobile Communications, Chongqing 400065, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(22), 4974; https://doi.org/10.3390/s19224974
Received: 24 August 2019 / Revised: 5 November 2019 / Accepted: 12 November 2019 / Published: 15 November 2019
(This article belongs to the Special Issue Vehicular Network Communications)
Due to limited computation resources of a vehicle terminal, it is impossible to meet the demands of some applications and services, especially for computation-intensive types, which not only results in computation burden and delay, but also consumes more energy. Mobile edge computing (MEC) is an emerging architecture in which computation and storage services are extended to the edge of a network, which is an advanced technology to support multiple applications and services that requires ultra-low latency. In this paper, a task offloading approach for an MEC-assisted vehicle platooning is proposed, where the Lyapunov optimization algorithm is employed to solve the optimization problem under the condition of stability of task queues. The proposed approach dynamically adjusts the offloading decisions for all tasks according to data parameters of current task, and judge whether it is executed locally, in other platooning member or at an MEC server. The simulation results show that the proposed algorithm can effectively reduce energy consumption of task execution and greatly improve the offloading efficiency compared with the shortest queue waiting time algorithm and the full offloading to an MEC algorithm.
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MDPI and ACS Style
Cui, T.; Hu, Y.; Shen, B.; Chen, Q. Task Offloading Based on Lyapunov Optimization for MEC-Assisted Vehicular Platooning Networks. Sensors 2019, 19, 4974. https://doi.org/10.3390/s19224974
AMA Style
Cui T, Hu Y, Shen B, Chen Q. Task Offloading Based on Lyapunov Optimization for MEC-Assisted Vehicular Platooning Networks. Sensors. 2019; 19(22):4974. https://doi.org/10.3390/s19224974
Chicago/Turabian StyleCui, Taiping; Hu, Yuyu; Shen, Bin; Chen, Qianbin. 2019. "Task Offloading Based on Lyapunov Optimization for MEC-Assisted Vehicular Platooning Networks" Sensors 19, no. 22: 4974. https://doi.org/10.3390/s19224974
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