LAB: Lightweight Adaptive Broadcast Control in DSRC Vehicular Networks

Linsheng Ye,Linghe Kong,Shahid Mumtaz,Guihai Chen,Kayhan Zrar Ghafoor

doi:10.1155/2018/5713913

Abstract

The Industrial Internet of Things (IIoT) is the use of Internet of Things (IoT) technologies in manufacturing. The vehicular ad hoc networks (VANETs) are a typical application of IIoT. Benefiting from Dedicated Short-Range Communication (DSRC) technology, vehicles can communicate with each other through wireless manner. Therefore, road safety is able to be greatly improved by the broadcast of safety messages, which contain vehicle’s real-time speed, position, direction, etc. In existing DSRC, safety messages are broadcasted at a fixed frequency by default. However, traffic conditions are dynamic. In this way, there are too many transmission collisions when vehicles are too dense and the wireless channel is underused when vehicles are too sparse. In this paper, we address broadcast congestion issue in DSRC and propose lightweight adaptive broadcast (LAB) control for DSRC safety message. The objectives of LAB are to make full use of DSRC channel and avoid congestion. LAB meets two key challenges. First, it is hard to adopt a centralized method to control the communication parameters of distributed vehicles. Furthermore, the vehicle cannot easily acquire the channel conditions of other vehicles. To overcome these challenges, channel condition is attached with safety messages in LAB and broadcast frequency is adapted according to neighboring vehicles’ channel conditions. To evaluate the performance of LAB, we conduct extensive simulations on different roads and different vehicle densities. Performance results demonstrate that LAB effectively adjusts the broadcast frequency and controls the congestion.

Highlights

Internet of Things (IoT) is an ecosystem of connected physical objects such as home appliances, vehicles, and robots, so that they have ability to access the Internet and communicate with each other [1]
We propose a novel method, named lightweight adaptive broadcast (LAB) control, for Dedicated Short-Range Communication (DSRC) safety message to make full use of channel and avoid channel congestion
We find that when the transmission power increases, broadcast frequency and the number of safety messages converge into a stable state

Summary

Introduction

Internet of Things (IoT) is an ecosystem of connected physical objects such as home appliances, vehicles, and robots, so that they have ability to access the Internet and communicate with each other [1]. The vehicular ad hoc networks (VANETs) [9] are a typical application of IIoT and make vehicles have the ability to communicate with each other. In recent years, Dedicated Short-Range Communication (DSRC) [10] is an emerging technology in VANETs, which provides the communication capability among vehicles [11]. The US Federal Communication Commission (FCC) allocated 75MHz licensed spectrum at 5.9 GHz for DSRC, which can be used exclusively for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications [13]. The DSRC spectrum is divided into 7 channels and the control channel (CCH) is exclusively reserved for safety communications [14]

Objectives

Methods

Results

Conclusion