期刊
IEEE INTERNET OF THINGS JOURNAL
卷 7, 期 8, 页码 7097-7111出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JIOT.2020.2982292
关键词
Reliability; Edge computing; Task analysis; Cloud computing; Internet of Things; Resource management; Computer architecture; Computation offloading; edge computing; Internet of Vehicles (IoV); reliability; software-defined network (SDN)
资金
- National Key Research and Development Program of China [2019YFB1803301, SQ2016YFHZ021501, 2018YFE0126000]
- National Natural Science Foundation of China [61571338]
- Key Research and Development Program of Shanxi Province [2017ZDCXL-GY-05-01]
- Xi'an Key Laboratory of Mobile Edge Computing and Security [201805052-ZD3CG36]
- 111 Project in Xidian University of China [B08038]
- Pre-Research Fund of Equipments of Ministry of Education of China [6141A02022615]
- Shuimu Tsinghua Scholar Program
Internet of Vehicles (IoV) has drawn great interest recent years. Various IoV applications have emerged for improving the safety, efficiency, and comfort on the road. Cloud computing constitutes a popular technique for supporting delay-tolerant entertainment applications. However, for advanced latency-sensitive applications (e.g., auto/assisted driving and emergency failure management), cloud computing may result in excessive delay. Edge computing, which extends computing and storage capabilities to the edge of the network, emerges as an attractive technology. Therefore, to support these computationally intensive and latency-sensitive applications in IoVs, in this article, we integrate mobile-edge computing nodes (i.e., mobile vehicles) and fixed edge computing nodes (i.e., fixed road infrastructures) to provide low-latency computing services cooperatively. For better exploiting these heterogeneous edge computing resources, the concept of software-defined networking (SDN) and edge-computing-aided IoV (EC-SDIoV) is conceived. Moreover, in a complex and dynamic IoV environment, the outage of both processing nodes and communication links becomes inevitable, which may have life-threatening consequences. In order to ensure the completion with high reliability of latency-sensitive IoV services, we introduce both partial computation offloading and reliable task allocation with the reprocessing mechanism to EC-SDIoV. Since the optimization problem is nonconvex and NP-hard, a heuristic algorithm, fault-tolerant particle swarm optimization algorithm is designed for maximizing the reliability (FPSO-MR) with latency constraints. Performance evaluation results validate that the proposed scheme is indeed capable of reducing the latency as well as improving the reliability of the EC-SDIoV.
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