车联网环境下车辆辅助的自适应任务卸载策略

doi:10.19665/j.issn1001-2400.20250111

Abstract

Abstract:

With the rapid development of vehicular networking,edge servers with a limited computing power will delay the task completion time when facing the processing of a large amount of data,affecting the user experience.However,some vehicles traveling on the road may have idle resources under the premise of meeting their own needs,resulting in a waste of resources.In addition,retransmission of tasks due to instability of communication connections in dynamic telematics environments is also a key issue to be addressed.Aiming at the above problems,this paper proposes a vehicle-assisted adaptive task offloading strategy for the Internet of vehicles to reduce the task completion time.We categorize task offloading in the vehicular networking environment into the following two cases based on the relative position of the vehicle and the edge server,the communication coverage,and considering the vehicle’s driving state information.When the vehicle is not or is about to drive out of the edge server coverage,the task cannot be offloaded directly to the edge server,and then an optimal service vehicle selection algorithm is proposed to offload the task to the optimal service vehicle.When the vehicle is within the coverage range of the edge server,a task scheduling algorithm based on hybrid differential teaching optimization is proposed to offload the task to the optimal edge server.Finally,simulation experiments are designed to verify the effectiveness of the proposed task offloading strategy in comparison with existing methods.

Key words: internet of vehicles, task offloading, service vehicle, hybrid differential teaching optimization

CLC Number:

TP393.09

ZHANG Chao, ZHAO Hui, DONG Yuhang, TANG Hanqin, WANG Jing, WAN Bo, WANG Quan. Vehicle-assisted adaptive task offloading strategy for the internet of vehicles[J].Journal of Xidian University, 2025, 52(3): 176-187.

Figures/Tables 6

References 21

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参数	值	参数	值
车辆数量N	50~200	车辆之间通信带宽/MHz	10
信道衰落系数	4.2	车载处理器频率/GHz	[1,2]
边缘服务器无线信号覆盖半径/m	200	边缘服务器单核频率/GHz	5.0
信道背景噪声功率/dBm	-110	边缘服务器间有线链路带宽/(Mb·s^-1)	500
车辆上传功率/dBm	30	任务输入数据大小/MB	[0.5,1]
RSU通信带宽/MHz	100	任务所需计算量大小cycle/bit	[300,500]

Vehicle-assisted adaptive task offloading strategy for the internet of vehicles

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