RESEARCH ABOUT THE INTEGRITY MONITORING METHOD OF PPP FOR REAL-TIME ITS APPLICATIONS

Abstract

The implementation of the Intelligent Transportation System (ITS) is expected to greatly improve
road safety and transport efficiency. One of the key components of ITS is precise positioning of vehicles.
Positioning with the accuracy within a decimeter to a meter is essential in self-driving and other
automated applications. The Global Navigation Satelitte System (GNSS) and the Precise Point
Positioning (PPP) is a viable approach for ITS due to the relatively low cost and possibility. However,
GNSS PPP is vulnerable to a number of bugs and errors, especially those caused by the urban
enviroment. To meet the high requirements of the ITS applications, it's necessary to thoroughly
analyze the hidden errors and failures and research about integrity monitoring methods. This paper,
the potential vulnerabilities of GNSS PPP will be presented, thereby suggesting possible methods to
monitor the integrity of PPP.