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The IEEE 802.15.4 protocol offers great potential in several application fields, such as industrial Wireless Sensor Networks (WSNs). An industrial automation cell (field level) is characterized mostly by periodic traffic flows. Using the IEEE 802.15.4 protocol, it is necessary to manage Guaranteed Time Slots (GTSs) allocation and at the same time ensure adequate performance both to other periodic...
Wireless Sensor Networks (WSNs) are increasingly used in different application fields thanks to several advantages such as cost-effectiveness, scalability, flexibility and self-organization. A hot research topic concerns the study of algorithms and mechanisms for reducing the power consumption of the nodes in order to maximize their lifetime. To this end, this paper proposes an approach based on two...
WirelessHART and IEEE 802.15.4 are the most suitable protocol for industrial applications. WirelessHART, in particular, overcomes some problems related to the IEEE 802.15.4 protocol such as the maximum number of Guaranteed Time Slots during which it is possible to transmit real-time information. However, the power consumption ofWirelessHART devices is still higher than IEEE 802.15.4. This article...
Wireless networks (WNs) are today used in many areas thanks to several benefits deriving from the ease of installation and maintenance and the high scalability. However, in large areas, the increasing number of nodes implies that Access Points (APs) are the main responsible of clients’ connection. An overloaded access point may compromise requirements in terms of timeliness of data exchanged among...
The IEEE 802.15.4 standard protocol for Wireless Sensor Networks (WSNs) offers several advantages, such as the low power consumption, which can also be applied in industrial environments. However, many researchers highlighted some limitations also. For example, the CSMA/CA algorithm, that manages the access to the medium, is a contention-based approach and, as a consequence, it is non deterministic...
In factory automation contexts, the localization is an important issue to be considered in order to help industrial monitoring processes, at different layers. This paper shows the study of an innovative localization platform, for industrial environments, based on the IEEE 802.11 technology. The platform can be easily implemented inside an existing communication architecture, introducing several Wi-Fi...
In industrial Wireless Sensor Networks (WSNs), traffic flows are characterized by regular arrival times and real-time constraints. Sampling times management is a key aspect in terms of timeliness in information retrieval and real-time management of critical events in factory automation. This paper shows an algorithm that dynamically update sampling times in an industrial monitoring system based on...
Advantages provided by the use of wireless technologies in industrial scenarios, like reduced costs of installation, better flexibility, the ability to easily realize temporary deployments (e.g. for monitoring purposes), etc. are discussed by researchers in literature. In these contexts, time-critical transmissions have to be supported by automation networks. In IEEE 802.11 standard protocol, one...
The increasing of cars in our planet and the consequent congestion of urban and intercity traffic, opens new challenges in ITS (Intelligent Transportation System). They can refer to several aspects. This paper analyses Carpooling, a technique of private cars sharing diffused in United Kingdom, United States and Italy to mention some. It helps to handle several troubles, such as the release of CO2...
This paper shows an innovative Wireless Sensor Network (WSN) architecture based on a flexible Quality of Service (QoS) approach for road traffic management. The aim of this work is to analyse an algorithm that dynamically enables/disables some cameras according to the real need to monitor a given area, It is based on traffic volume measured values. This approach has been developed in order to manage...
The network management plays an important role in Wireless Sensor Networks WSNs, to control both the sleep and the wake times of the nodes to make data transmissions in an energy-efficient way, thus prolonging network lifetime. In this paper, we propose an innovative approach to control the uptime of the nodes of an Industrial WSN using a fuzzy based algorithm. In a scenario of process control is...
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