Sampling with strict energy constraints

With more and more battery-operated devices equiped with sensors, it is becoming increasingly relevant to focus not only on energy efficiency, but also on ensuring that the available energy is not spent before the battery will be recharged. In this thesis a strategy for adaptive sampling is proposed that adapts the sample rate while respecting a...

Design and Implementation of Fault-Tolerant Firmware Updating Methods for Time-Critical Battery Products

Energy Allocation Strategies for Micro-Grids

The advances of the information and communication technology (ICT) brought changes in the energy distribution domain, introducing the Smart Grid (SG). In SG, generators, distributors, and consumers communicate in a bidirectional way. SGs are envisaged to include micro-grids (MG) consisting of distributed control networks of consumers, prosumers,...

Leveraging VLC for energy disaggregation in Smart Buildings

Relative localization for Mobile Nodes using Visible Light

A growing number of wireless devices and increasing traffic in the radio spectrum has pushed for alternatives to radio based communication. Among these, communication using visible light (VLC) has gained considerable momentum. The imminent adoption of energy efficient Light Emitting Diodes (LEDs) and the high data transmission rates offered by...

Passive Localization with Visible Light

Indoor localization is a topic of significant interest for academic and in dustrial. For outdoors, we have Global Positioning System (GPS) working very well, but GPS does not work indoors and we spend more than 90% of the time indoors. Thus, there is a great need to find solution for this prob lem. Many technologies have been proposed for indoor...

Opportunistic Routing for Indoor Energy Harvesting Wireless Sensor Networks

Internet of Things (IoTs) is envisioned to enable smart spaces such as smart homes, interactive museums or personalized trade in shopping malls. In these smart homes, several sensors and actuators assist in automating tasks of daily life by forming wireless sensor networks (WSNs). Active and Assisted Living (AAL) is one of the important...

Handshake Recognition applied to Wireless Data Exchange in Smartbands

The way people meet each other is usually face to face. Meanwhile, the way people maintain their contacts is mostly through social media. This results in a gap of translating a handshake into a digital connection. Shake-On is a start-up that has come up with an answer by means of a smart bracelet. Their aim is to wirelessly exchange contact...

Enabling the Chaos Networking Primitive on Bluetooth LE

Cyber-Physical Systems (CPS) integrate physical processes, sensors, and embedded computers to facilitate advanced control systems such as autonomous cars and smart cities. Communication in CPS has tight constraints regarding reliability and latency, while traditional networking primitives can not guarantee these constraints. We base our thesis...

Sensor-Assisted Movement Identification and Prediction for Beamformed 60 GHz Links

The 60 GHz frequency band promises very high data rates { in the order of Gb/s { due to the availability of large amounts of bandwidth. High free- space path loss at the 60 GHz frequency band makes it necessary to employ beamforming capable directional antennas to confine signal power in the desired direction. When beamforming is used, the links...

Online deployment of dependent tasks onto networked systems

The static deployment of tasks onto the components of a networked system is a design-time activity. Given a set of tasks it is desirable to distribute them across the network elements such that an intended system functionality is achieved while application specified criteria—such as power consumption or execution time—are optimized. However, it...

Network-based bootloader for distributed embedded systems applications

This thesis describes the design, implementation and deployment of a network-based bootloader for distributed embedded systems applications. The bootloader is based NXP's LPC1769 microcontroller containing the ARM Cortex-M3 processor. The CAN bus is used as the network's physical layer. Due to the modular design of the bootloader, easily...

An Embedded Spatial Computing Platform for Interactive Environments

The design of interactive environments has taken a leap in recent years. It has encountered issues similar to those faced before in distributed system: scalability, robustness, and complexity. We present an Embedded Spatial Computing platform for Interactive Environments. It makes use of research from the field of Computer Science and Embedded...

Hearsay: Suppressing spam using trust in mobile social gossiping networks

The development of social networks has changed the way we communicate from a personal conversation into a broadcast with a world-wide audience. Social networks have proven themselves useful during protests and natural disasters by providing a platform to share ideas and offer help to those in need. However, due to the reliance on the Internet...

Run-time Reconfiguration in Wireless Sensor Networks

A wireless sensor network (WSN) consists of multiple small and simple computers (nodes), whose performance is tightly linked to its unpredictable deployment environment. It is nearly impossible to design a WSN that performs well in every scenario; instead they are developed for a specific context, with performance rapidly decreasing when...

Wireless Sensor Platform for Sporting Applications

With Wireless Sensors widely used in various domains like home automation, industrial monitoring there is a market urge to deploy the wireless sensors in sporting applications. By deploying wireless sensors in sports, various dimensions of use-case scenarios become obvious which include monitoring sports players to help assess their fitness...

BirdTracking: A Wireless Sensor Network to Observe Bird Life

Field biologists and ecologists have started to open a new avenue of inquiry at greater spatial and temporal resolution, allowing them to “observe the unobservable” through the use of wireless sensor networks. Study of birds has helped to develop fundamental knowledge of bird behavior, foraging pattern and migration. The acquired knowledge of...