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Smart Grids require a pervasive communication network to interconnect their intelligent devices (e.g. generators, protections, and meters) that are usually distributed over a wide area. Recently, the Long Term Evolution (LTE) wireless cellular network communication technology has been introduced and its diffusion is rapidly increasing. As a consequence, LTE may be considered as a viable opportunity...
The paper deals with a new test bench for the assessment of time-related performance of wireless systems implementing the IEEE 802.15.4 with the Chirp Spread Spectrum (CSS) physical layer. The test bench has been designed in order to clearly evaluate the timestamping capabilities of an FPGA-based implementation of the IEEE 802.15.4 CSS. The key features are the full bandwidth capability and the extreme...
Today, wireless sensor technology is based on monolithic transceivers that optimize cost but have a rigid hardware architecture. In this paper, a new architecture for wireless sensors is presented. It is based on a software-defined radio concept and shows impressive adaptability to external conditions. The proposed architecture, which is called the wireless ultrasmart sensor (WUSS), enables the use...
Wireless communications in the industrial automation world still suffer from lack of standardization. WirelessHART, released in September 2007, is still the only open communication standard specifically designed for real-time process control applications. This paper presents an innovative distributed tool for capturing WirelessHART packets in the field. In fact, even if tools for compliance assessment...
Traditional wireless sensors rely on monolithic transceivers optimizing cost but offering a very low flexibility. On the other hand, microwaves in the GHz range are used for displacement and position sensing. In this work a new architecture for wireless sensors, called wireless ultra smart sensor, is introduced. The new sensor architecture is built using software defined radio concepts and it has...
In this paper, the WirelessHART communication scheme is investigated. The protocol is at first described, in order to underline the key aspects of its design; then, a simulation tool is presented: it enables analysis that accounts for both protocol and physical layers issues. In particular, interference effects on protocol choices can be easily analyzed. The experimental results, obtained from simulations,...
A precise time synchronization is essential in many wireless sensor networking applications, e.g. in order to correlate observations of the same event from different sites or to efficiently share the wireless channel. Generally, wireless sensors are designed having in mind low cost and low power. In the past, several protocols have been suggested, each one with its pros and cons, aiming at the maximization...
This paper deals with the problem of coexistence of wireless sensor networks (WSNs) for industrial applications, proposing new approaches. In fact, if several WSNs operate in the same area, the reliability of the system rapidly decreases, especially if static radio channel assignment WSNs and frequency hopping WSNs are mixed. The proposed architecture is based on a collaborative approach that exploits...
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