关键词: 车联网络, 分布式存储, 区块链, 联盟链

Abstract:  The traditional centralized Vehicular Ad Hoc Networks （VANET） architecture is difficult to overcome the increasingly complex problems of Intelligent Transportation System （ITS） applications， as well as the challenges of large amounts of data storage， trust management and information security. Therefore， Vehicular Edge Computing Networks （VECNets） emerged as the times require， providing powerful network edge computing capabilities for massive storage resources. However， due to potential data leakage and security risks， the centralized server in VECNets has a Single Point of Failure （SPoF）. In response to the above problems， a distributed network framework that integrates blockchain and smart contracts is proposed to ensure a secure environment for data storage and share in the system. We utilize the decentralization， anti-tampering characteristics and controllability balance of the alliance chain to ensure the security of data storage in the Internet of Vehicles. Additionally we combine edge computing and Byzantine Fault Tolerance consensus model （Practical Byzantine Fault Tolerance， PBFT） to distribute the data storage to road edges， thereby reducing data transmission latency. Experimental results show that the protocol proposed in this article has a good effect in improving the system throughput， reduces consensus delay and communication cost performance parameters of the vehicle network.

Key words: Internet of Vehicles, distributed storage, blockchain, alliance chain