Abstract
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.
Highlights
With the development of wireless communication, data sensing/processing, computing, and control technology, the Internet of Vehicles (IoV) has become a promising solution to intelligent transportation systems (ITS) [1]–[4]
Different from the existing studies that mostly focus on how to utilize the trust management function or incentive mechanism of the blockchain technology [42]–[44], we focus on the vehicle density difference between different hours in a geographical area, and design a new scheme to improve the performance of the blockchain system
WORK In this paper, we proposed a multi-channel blockchain scheme for IoV where each channel is optimized for a certain level of vehicle density and application requirements
Summary
With the development of wireless communication, data sensing/processing, computing, and control technology, the Internet of Vehicles (IoV) has become a promising solution to intelligent transportation systems (ITS) [1]–[4]. Applying vehicular ad hoc network (VANET) technologies makes the distributed communications possible at the network layer [7], but when it comes to the exchange of user data, the interoperability of the devices and applications from different manufacturers and service providers in ITS is still a problem that needs to be solved [8]. The blockchain system needs to handle a large amount of data and transactions under a highly dynamic network topology due to the high mobility of the vehicles in the network [15] This characteristic of the vehicular network limits the efficiency of the block propagation. By using different channels based on the number of vehicles using the blockchain, the blockchain scheme is able to satisfy the application requirements including transaction throughput and delay.
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