Different wireless communication technologies, such as wireless fidelity (Wi‐Fi), 4G cellular technologies and worldwide interoperability for microwave access (WiMAX) have been used as alternatives or supplement to wired communication in intelligent transportation systems (ITS). Widespread deployment of wireless technologies in ITS require a comprehensive understanding of their performance, limitations and advantages in different field conditions. The authors evaluated performance of Wi‐Fi wireless communication between adjacent roadside ITS devices (i.e., nodes) in different field conditions with varying characteristics of Wi‐Fi technology. Field tests revealed that modulation rates, transmission power, line of sight, distance between nodes play critical roles in the performance of Wi‐Fi communication in different roadway conditions. To achieve a desired level of performance requirements between adjacent nodes, minimum network performance thresholds must be realized in the field. Transportation agencies can identify the achievable performance, such as saturated throughput, delivery ratio and received signal strength at a particular location, by following the field test procedure developed in this research. The evaluation strategies and results presented in this study will contribute to the future planning and design of Wi‐Fi communication for a roadway wireless sensor or device network considering corresponding communication performance requirements for specific ITS applications.
Process for evaluating the data transfer performance of wireless traffic sensors for real‐time intelligent transportation systems applications
IET Intelligent Transport Systems ; 11 , 1 ; 18-27
2017-02-01
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
delivery ratio , received signal strength , field tests , ITS applications , saturated throughput , Wi‐Fi wireless communication network , modulation rates , wireless LAN , transportation agencies , Wi‐Fi technology , worldwide interoperability , wireless fidelity , data transfer performance , real‐time intelligent transportation systems applications , wired communication , microwave access , wireless traffic sensor network , wireless technologies , communication link , adjacent nodes , open systems , roadway network , roadside ITS devices , minimum network performance , roadway conditions , intelligent transportation systems , wireless traffic sensors , Wi‐Fi connections
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