Jorge Higuera

IEEE 1451 Standard in 6LoWPAN Sensor Networks Using a Compact Physical-Layer Transducer Electronic Datasheet

The adoption of the Internet Protocol version 6 (IPv6) networking in IEEE 802.15.4 sensor networks, using IEEE 1451 standardization, increases the interoperability of low-power smart-sensor devices over IP networks. This paper explains the design and implementation of the IPv6 sensor network over low-power wireless personal-area networks (6LoWPANs), and it uses the IEEE 1451 standard in IEEE 802.15.4 sensor networks. We propose the design of the 6LoWPAN physical-layer transducer electronic datasheet (PHY-TEDS) using data-type redefinition with the header compression. Each TEDS was analyzed in terms of memory size, obtaining a reduction of 48% in the PHY-TEDS and 25% in the meta-TEDS with respect to the standard definition. Finally, the IEEE 1451 commands are encapsulated in User Datagram Protocol datagrams to establish communication from the network capable application processor to the wireless transducer interface module in an environmental monitoring application.

A Zigbee wireless sensor network compliant with the IEEE1451 standard

Wireless sensor networks are becoming very attractive for monitoring and control applications with smart sensor nodes. We present an implementation of a ZigBee wireless sensor network compliant with the IEEE1451 standard to improve the interoperability. This paper describes the message structure, commands and transactions. Furthermore, a proposal is presented to enhance the IEEE1451.5 ZigBee physical transducer electronic datasheet (PHY TEDS).

Experimental Study of Bluetooth, ZigBee and IEEE 802.15.4 Technologies on Board High-Speed Trains

This paper studies the feasibility of using low-power wireless technologies such as Bluetooth, IEEE 802.15.4 and ZigBee in high-speed railway scenarios that involve bidirectional ground-to-train communication. The presented results have been obtained through experimental tests conducted at the Madrid-Barcelona high-speed rail line. A multiplatform communication system has been installed in a high-speed train, circulating at velocities up to 300 km/h, whereas autonomous devices have been disseminated along of the railway path to communicate with the onboard devices. The conclusions drawn from this work will be used as guidelines for the future implementation of autonomous communication platforms for high-speed rail connectivity.

Smart Lighting System ISO/IEC/IEEE 21451 Compatible

Smart lighting systems go far beyond merely replacing lamps. These modern systems are now able to reproduce arbitrary spectra, color temperatures, and intensities and pivot on smart sensors and actuators incorporating information and communication technologies. This paper presents an interoperable smart lighting solution that combines heterogeneous lighting technologies enabling intelligent functions. The system can shift light intensity to increase visual comfort, and it is oriented toward human centric lighting studies. Moreover, this system follows the guidelines defined by the ISO/IEC/IEEE 21451 standards and ZigBee Light Link and also, it includes an additional transducer signal treatment service for artificial intelligence algorithms. Finally, a representational state transfer application allows us to test the interoperability and visualize energy savings in an office room.

Understanding the IEEE 1451 standard in 6loWPAN sensor networks

The adoption of the IPv6 networking in IEEE 802.15.4 sensor networks, using IEEE 1451 standardization, increases the interoperability of low-power smart sensor devices in IP networks. This paper explains the design and implementation of IPv6 over Low power Wireless Personal Area Networks (6loWPAN) and it uses the IEEE 1451 standard over IEEE 802.15.4 sensor networks. We propose an application of API IEEE 1451 that uses web services to transmit IEEE 1451 commands between Network Capable Application Processor (NCAP) and Wireless Transducer Interface Module (WTIM) using the client-server architecture. In addition the design of 6loWPAN Physical Transducer Electronic Datasheet (PHY-TEDS) IEEE 1451.5 is explained. All TEDS were analyzed in terms of memory size. Each IEEE 1451 command is encapsulated in an UDP socket to establish NCAP-to-WTIM communication in an environmental monitoring application

Standardization for interoperable autonomous smart sensors in the future energy grid system

A hierarchy to reach the interoperability of future smart energy grid system is proposed by introducing compliant levels in a pyramidal model. Interoperability layers in this approach was modeled using a button-top approach, from a technical lovel and standards, such as ZigBee or 6loWPAN, with autonomous smart sensors to reach syntactic interoperability based on the IEEE 1451 standard. Also, the IEEE 1451 smart sensor model is defined taking into account a Network Capable Application Processor (NCAP), as coordinator node, and autonomous smart sensor nodes, Wireless Transducer Interface Module (WTIM) nodes, with sensing capabilities for cooperation with energy grid system, that employs the IEEE 1451 standard based on standard commands with header compression to decrease overall metadata information. Furthermore, this model could be extended in the future for small energy harvesting devices deployed in smart homes and energy utilities, to improve the efficiency, reliability and customer cost savings.

Tiny and autonomous IEEE1451 Sonic Anemometer to deploy in environmental Wireless Sensor Network

Wind speed and direction are important parameters in the study of applied meteorology, for example, in weather prediction, air pollution, transport safety and structural safety. In this paper, we propose the design and deployment of an interoperable Smart Ultrasonic Anemometer that uses the IEEE 1451 standard and operates in a Wireless Sensor Network (WSN). This standard permits interoperability and introduces self-calibration and self-configuration tasks. We include power management considerations to calculate the energy consumption using a low power sampling protocol BMAC with variable duty cycle. Experimental tests are included to study the current consumption using an energy harvester with solar panel and super capacitors to increase the reliability and lifetime of the sensor node.

Pervasive Computing Approaches to Environmental Sustainability

This issues Works in Progress department lists eight projects with a focus on environmental sustainability. The first three projects explore sensing and pervasive computing techniques for monitoring environmental conditions in outdoor situations. The next four projects use pervasive computing in indoor environments to inform individuals about their energy and resource consumption with the goal of positively influencing their behaviors. The final project aims to develop an energy generation infrastructure that combines multiple types of renewable energy sources.

An experimental study of multi-radio platform coexistence in the 5 GHz band for railway applications

This paper studies the practical challenges that arise due to the coexistence of two wireless technologies, both operating in the license-exempt 5 GHz band. In particular, WiFi and WiMAX equipment have been used in the experiments. The mutual interference caused by the two technologies operating in different but narrowly separated frequency channels has a negative impact on the performance of both systems. Further challenges are introduced when the two systems are in close physical proximity of each other or, in a more extreme scenario, share the same antenna as could be required in railway applications. This paper investigates these issues through a series of experimental tests based on a multi-radio platform testbed. The conclusions drawn from this study will be used as a base for the implementation of a multi-radio platform to provide communications between train and land in both directions in the context of the Spanish high-speed railway system.

Tuneable and portable lighting system for Visible Light Communications (TP-VLC)

This work presents a low cost prototype implementing new IEEE 802.15.7 standard for Visible Light Communications. A commercial off-the-shelf development platform is used to implement the firmware controlling the system. The system is tested with different LED luminaires and distances achieving data rates of 100 kbit/s with Bit Error Rates between (10-7 to 10-4) over distances up to 8 meters. Brightness control of the LED while transmitting data can be achieved allowing for a tuneable VLC system.