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Computation Offloading and Resource Allocation For Cloud Assisted Mobile Edge Computing in Vehicular Networks

2019; Institute of Electrical and Electronics Engineers; Volume: 68; Issue: 8 Linguagem: Inglês

10.1109/tvt.2019.2917890

1939-9359

Junhui Zhao, Qiuping Li, Yi Gong, Ke Zhang,

Privacy-Preserving Technologies in Data

Computation offloading services provide required computing resources for vehicles with computation-intensive tasks. Past computation offloading research mainly focused on mobile edge computing (MEC) or cloud computing, separately. This paper presents a collaborative approach based on MEC and cloud computing that offloads services to automobiles in vehicular networks. A cloud-MEC collaborative computation offloading problem is formulated through jointly optimizing computation offloading decision and computation resource allocation. Since the problem is non-convex and NP-hard, we propose a collaborative computation offloading and resource allocation optimization (CCORAO) scheme, and design a distributed computation offloading and resource allocation algorithm for CCORAO scheme that achieves the optimal solution. The simulation results show that the proposed algorithm can effectively improve the system utility and computation time, especially for the scenario where the MEC servers fail to meet demands due to insufficient computation resources.