Self-Organisation for Survival

In a dynamic or disruptive situation, such as disasters, a fully mobile and decentralized infrastructure-less network seems to be a viable option for communication. Citizens are confronted with challenges such as complicated deployment of these networks, resource-constrained mobile phones and mobility. This requires communication networks to...

DevLoc: Seamless device association using light bulb networks for indoor iot environments

For indoor IoT environments, spontaneous device associations are of particular interest where users establish a connection in an ad-hoc manner to enable serendipitous interaction. For instance, between a user's personal device and devices the user encounters in the surrounding environment. Our system for device grouping named DevLoc takes...

Self-organizing topology for energy-efficient ad-hoc communication networks of mobile devices

When physical communication network infrastructures fail, infrastructure-less communication networks such as mobile ad-hoc networks (MANET), can provide an alternative. This, however, requires MANETs to be adaptable to dynamic contexts characterized by the changing density and mobility of devices and availability of energy sources. To address...

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...

Analyses and deployement of the BitTorrent protocol for community ad hoc networks

Allocation of Opportunistic Spectrum for Cognitive Radio Ad hoc Networks

Cognitive Radios (CRs) address the problems of spectrum scarcity and under-utilization of the spectrum. However, realizing a CR network is neither easy nor straight-forward. The link layer in CR Ad hoc Networks is responsible for allocating suitable channels, out of the currently available channels. It is also responsible for setting up...

Personal networks: An architecture for self-organized personal wireless communications

Random graphs: From static to dynamic

Many empirical studies on real-life networks show that many networks are small worlds, meaning that typical distances in these networks are small, and many of them have power-law degree sequences, meaning that the number of nodes with degree k falls off as kˆ (-τ) for some exponent τ>1. These networks are modeled by means of scale-free random...

Fundamental Properties of Wireless Mobile Ad-hoc Networks

Wireless mobile ad-hoc networks are formed by mobile devices that set up a possibly short-lived network for communication needs of the moment. Ad-hoc networks are decentralized, self-organizing networks capable of forming a communication network without relying on any fixed infrastructure. Each node in an ad-hoc network is equipped with a radio...