Architectures for Wireless Sensor Networks

Various architectures have been developed for wireless sensor networks. Many of them leave to the programmer important concepts as the way in which the inter-task communication and dynamic reconfigurations are addressed. In this paper we describe the characteristics of a new architecture we proposed - the data-centric architecture. This architecture offers an easy way of structuring the applications designed for wireless sensor nodes that confers them superior performances

AmbientRT - real time system software support for data centric sensor networks

We present the architecture and design of a real time operating system for mobile wireless sensor networks. AmbientRT is being developed for environments with very limited resources in order to relieve the burden of the developer and to efficiently use the resources of the node. This paper presents the main concepts used and trade-offs involved in the system. Initial results show that with the current hardware available for sensor networks, the real time concept is feasible. For real-time scheduling we have designed EDFI. EDFI is a lightweight real-time scheduling protocol that combines EDF with deadline inheritance over shared resources. EDFI is precise with task admission control, very efficient with scheduling and dispatching, and straightforward in feasibility analysis

Collaborative communication protocols for wireless sensor networks

In this document, the design of communication within a wireless sensor network is discussed. The resource limitations of such a network, especially in terms of energy, require an integrated approach for all (traditional) layers of communication. We present such an integrated, collaborative approach which is part of current research in the European research project EYES on energy-efficient sensor networks. In particular, energy-efficient solutions for medium access control, clusterbased routing and multipath routing are discussed. As part of the ongoing project, these approaches work together and are designed to support each other

Data-centric architecture for wireless sensor networks

Ad-hoc and sensor networks have gained a lot of attention lately. Due to technological advances, building small-sized, energy-efficient reliable devices, capable of communicating with each other and organizing themselves in ad-hoc networks has become possible. These devices have brought a new perspective to the world of computers as we know it, pushing us into what can be called the third era of computing: intelligent devices can be embedded into the environment, assisting the user in performing various tasks while being invisible to him. The need for reconfiguration and maintenance disappears as the networks organize themselves to adapt to the continuously changing environment and requirements