Blockchain-Based Vehicular Collaborative Computing

Collaborative computing among vehicles on the road has been regarded as a promising application for connected and intelligent vehicles as new computing and communication technologies emerge. Instead of using cloud computing services, a vehicle can complete computing-intensive tasks by making use of neighboring vehicles' idle computing resources and meanwhile, pay for this service to the assisting vehicles to increase their incentive to participate in such collaborative computing tasks. In collaborative computing among vehicles, how to balance the profits of both sides need to be investigated. What's more, the reliability of transactions is also a concerning problem. In this paper, we first introduce a collaborative computing scenario and propose a two-layer blockchain architecture to enhance the reliability of transactions. Then, we propose a coalition formation game-based collaborative computing algorithm to efficiently achieve effective computing coalition formation in a distributed manner. Simulation results show that the proposed algorithm can significantly improve the vehicles' utilities as well as the task performance.