With the development of advanced information and communication technology, the traditional centralized service model alone no longer meets the increasing demand of data exchange in intelligent transportation systems (ITS). While Internet of Vehicles (IoV) technology has been introduced to achieve more advanced ITS, there are still some unsettled issues such as flexibility and fault tolerance. The conventional centralized approach for ITS is vulnerable to the single point of failure, and lack of flexibility due to its dependence on a trusted third party (TTP). The emergence of blockchain technology provides a potential direction to address these problems. However, due to varying vehicle densities, it is challenging to select the best blockchain parameters to satisfy the application requirements. In this paper, we propose a multi-channel blockchain scheme that can use the best parameters in accordance with the vehicle density. The proposed scheme first defines multiple blockchain channels where each channel is optimized for a certain vehicle density level. Then, the system selects the best channel according to the vehicle density, and the application requirements on the transaction throughput and latency. We use extensive simulations to show that the proposed blockchain scheme achieves a significantly better performance as compared with existing baselines.

中文翻译：

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车联网多通道区块链方案


随着先进信息通信技术的发展，传统的集中式服务模式已经不能满足智能交通系统（ITS）日益增长的数据交换需求。虽然车联网（IoV）技术已被引入以实现更先进的智能交通系统，但仍存在一些未解决的问题，例如灵活性和容错性。传统的集中式 ITS 方法容易出现单点故障，并且由于依赖可信第三方 (TTP) 而缺乏灵活性。区块链技术的出现为解决这些问题提供了潜在的方向。然而，由于车辆密度不同，选择最佳的区块链参数来满足应用需求具有挑战性。在本文中，我们提出了一种多通道区块链方案，可以根据车辆密度使用最佳参数。所提出的方案首先定义多个区块链通道，其中每个通道针对特定的车辆密度水平进行优化。然后，系统根据车辆密度以及应用对交易吞吐量和延迟的要求选择最佳通道。我们使用广泛的模拟来表明，与现有基线相比，所提出的区块链方案实现了显着更好的性能。