Reliable Traffic Monitoring Mechanisms Based on Blockchain in Vehicular Networks

TL;DR

This paper presents a blockchain-based traffic monitoring system leveraging vehicles for data collection, ensuring reliable, secure, and cost-effective traffic information gathering in smart cities.

Contribution

It introduces a lightweight blockchain trading framework and a budgeted auction mechanism to motivate vehicles for traffic data collection, ensuring reliability and truthfulness.

Findings

The proposed framework guarantees reliable traffic data collection.

The auction mechanism ensures budget adherence and truthfulness.

Simulations confirm the system's efficiency and correctness.

Abstract

The real-time traffic monitoring is a fundamental mission in a smart city to understand traffic conditions and avoid dangerous incidents. In this paper, we propose a reliable and efficient traffic monitoring system that integrates blockchain and the Internet of vehicles technologies effectively. It can crowdsource its tasks of traffic information collection to vehicles that run on the road instead of installing cameras in every corner. First, we design a lightweight blockchain-based information trading framework to model the interactions between traffic administration and vehicles. It guarantees reliability, efficiency, and security during executing trading. Second, we define the utility functions for the entities in this system and come up with a budgeted auction mechanism that motivates vehicles to undertake the collection tasks actively. In our algorithm, it not only ensures that the total payment to the selected vehicles does not exceed a given budget, but also maintains the truthfulness of auction process that avoids some vehicles to offer unreal bids for getting greater utilities. Finally, we conduct a group of numerical simulations to evaluate the reliability of our trading framework and performance of our algorithms, whose results demonstrate their correctness and efficiency perfectly.