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  • Schappacher, Manuel (23) (remove)

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  • 2016 (9)
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Extensions of the IEEE 802.15.4 protocol for the usage with highly energy-saving real-time communication (2015)
Nguyen, Minh Phuong ; Schappacher, Manuel ; Sikora, Axel
Real-time Water Level Monitoring Using Low-Power Wireless Sensor Network (2015)
Nguyen, Minh Phuong ; Schappacher, Manuel ; Sikora, Axel ; Ahmad, Zahoor ; Abubakr, Muhammad
Environmental Monitoring is an attractive application field for Wireless Sensor Network (WSN). Water Level Monitoring helps to increase the efficiency of water distribution and management. In Pakistan, the world’s largest irrigation system covers 90.000 km of channels which needs to be monitored and managed on different levels. Especially the sensor systems for the small distribution channels need to be low energy and low cost. The distribution presents a technical solution for a communication system which is developed in a research project being co-funded by German Academic Exchange Service (DAAD). The communication module is based on IEEE-802.15.4 transceivers which are enhanced through Wake-On-Radio (WOR) to combine low-energy and real-time behavior. On higher layers, IPv6 (6LoWPAN) and corresponding routing protocols like Routing Protocol for Low power and Lossy Networks (RPL) can extend range of the network. The data are stored in a database and can be viewed online via a web interface. Of course, also automatic data analysis can be performed.
Wake-On-Radio in Real Wireless Applications (2016)
Nguyen, Minh Phuong ; Jose, Joseena M ; Schappacher, Manuel ; Sikora, Axel
A Highly Scalable IEEE802.11p Subsystem Using Communication and Localization for Increased Vehicular Safety (2013)
Sikora, Axel ; Schappacher, Manuel
Development of Car2X Communication and Localization PHY and MAC Protocol Following Iterative Spiral Model Using Simulation and Emulation (2013)
Sikora, Axel ; Lill, Dirk ; Schappacher, Manuel ; Gutjahr, Simon ; Gerber, Eugen
A Flexible, Modular, Open-Source Implementation of 6LoWPAN (2015)
Schappacher, Manuel ; Schmitt, Edgar ; Sikora, Axel ; Weber, Patrick ; Yushev, Artem
Results of Cooperative Localization and Communication System for C2X-Applications (2013)
Schappacher, Manuel ; Sikora, Axel
A highly scalable IEEE802.11p communication and localization subsystem for autonomous urban driving (2013)
Sikora, Axel ; Schappacher, Manuel
Comparison of Cryptographic Implementations for Embedded TLS (2016)
Mamo, Fesseha Tsegaye ; Yushev, Artem ; Walz, Andreas ; Schappacher, Manuel ; Sikora, Axel ; Scherzinger, Clemens ; Ketterer, Lionel
Extensions of the IEEE802.15.4 Protocol for Ultra-Low Energy Real-Time Communication (2016)
Nguyen, Minh Phuong ; Schappacher, Manuel ; Sikora, Axel ; Groza, Voicu F.
Wireless sensor networks have found their way into a wide range of applications among which environmental monitoring systems have attracted increasing interests of researchers. The main challenges for the applications are scalability of the network size and energy efficiency of the spatially distributed motes. These devices are mostly battery-powered and spend most of their energy budget on the radio transceiver module. A so-called Wake-On-Radio (WOR) technology can be used to achieve a reasonable balance among power consumption, range, complexity and response time. In this paper, a novel design for integration of WOR into IEEE802.1.5.4 is presented, which flexibly allows trade-offs in energy consumption between sender and receiver station, between real-time capability and energy consumption. For identical behavior, the proposed scheme is significantly more efficient than other schemes, which were proposed in recent publications, while preserving backward compatibility with standard IEEE802.15.4 transceivers.
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