Traffic data transmission using Wireless Sensor Networks (WSN) principles IONEL PETRESCU, MARIA CLAUDIA SURUGIU Faculty of Transports, Telematics and Electronics for Transports (TET) Department POITEHNICA” University of Bucharest, 313, Splaiul Independentei, RO 060042, BUCHAREST, ROMANIA claudia.surugiu@upb.ro , npcrank@yahoo.com Abstract: - Wireless Sensor Networks (WSN) has recently experienced a significant development. New techniques and communication protocols emerged as well as physical implementations of network node mainly based on mixed signal microcontrollers and processors (MSP – Mixed Signal Processors).Control applications over wireless sensor networks require timely, reliable, and energy efficient communications. This is challenging because reliability and latency of delivered packets and energy are at odds, and resource constrained nodes support only simple algorithms. This article describes a method of transmitting data from traffic detectors to a collecting center. Key-Words: - Wireless sensor network, data transmissions, networked control, optimization, route establishment, energy per symbol, traffic detectors. 1 Introduction Wireless sensor network technology is considered one of the most important technologies of the 21st century. Its development was possible due to miniaturization of transceivers, sensors and actuators leading to a revolutionary way in which we interact with the environment [3]. Unlike the mobile communication networks, they have unique features such as high density sensor nodes that communicate with each other, limited energy source, individually and distributed computing, smaller data storage space, which leads to the need for researching the development and application of this technology. Radio data communications continue to develop and address the diverse needs of our society with the possibility of entering in any environment, as long as data transmission conditions are acceptable for the respective environments [6]. With the advent and implementation of wireless technologies (Wi-Fi 1 for the internet, Bluetooth and ZigBee for data transfer between various equipments, 1 Wi-Fi – Wireless Fidelity etc.) or mobile communication (GSM 2 , CDMA 3 , etc.), data communications horizon widened significantly and radio networks will replace wired networks in the environments in which they are not appropriate to use or they don’t exist. The very recent needs of our society are dictating new directions to be followed for the development of data communications. Therefore, the aim is to create a system with unlimited capacity, that will be functional in any circumstances and data will be accessed instantaneously by anyone, anywhere, anytime. Internet developments lead to such an idea and putting it in practice is the next step in achieving such a system [4]. The orientation of industry towards architectures based on services has it’s starting point in the evolution of mobile devices, phones and a wide range of radio networks (cellular phones, Wi-Fi, etc.), ad-hoc network evolution, and sensors that allow unlimited access to 2 GSM - Global System for Mobile Communications 3 CDMA - Code Division Multiple Access Advances in Automatic Control ISBN: 978-960-474-383-4 251