Remi Bosman

An Integral Approach to Programming Sensor Networks

In this paper we present a complete approach to programming sensor networks. The main contribution concerns the separation of three abstraction levels, viz., application level, network level and node level, leaving more room for standardization than with current practices. In addition we propose to program the network from an overall perspective rather than programming individual nodes. The proposed model is event-based, corresponding closely to the nature of wireless sensors and admits content-based addressing of nodes and groups of nodes. The paper describes how the three abstraction levels come together and gives examples of the approach at all three levels.

Gateway architectures for service oriented application-level gateways

In this paper we present lightweight and generic application level gateways for connecting service oriented sensor networks to service oriented standards in the consumer electronics domain. We study the trade-offs between interface richness, deployment granularity and overhead in discovery protocols and we present how the varying interaction patterns on both sides of the gateway can be efficiently mapped onto each other. As a result we obtain three different application-level gateways architectures. The analysis is kept concrete using the Open Service Architecture for Sensors and Universal Plug and Play (UPnP).

VICSDA: using virtual communities to secure service discovery and access

Service Oriented Architecture (SOA) is emerging as an enabling technology for sharing distributed heterogeneous resources on the network. Consequently, securing services is an increasing concern. Research issues include privacy protection for service providers, transparent access control for service consumers, secure service discovery and composition. In this paper, we present an access control approach which uses virtual communities to secure service discovery and access (VICSDA). Services grouped in virtual communities can only be discovered and accessed by authenticated community members. Meanwhile, services are autonomous to define their local access control policy. Moreover, behavior of these autonomous services is monitored in order to guarantee a better QoS provision. Using a virtual community overlay network on top of a SOA infrastructure, VICSDA can provide authentication, message confidentiality and integrity to secure service discovery and access. Better application performance can be achieved through VICSDA. We integrated VICSDA with a 3D video streaming application. This example provides us with some initial evidence that VICSDA is a viable solution to our target problems.

Discovery, monitoring and management in smart spaces composed of low capacity nodes

This paper introduces a lightweight architectural solution for discovery, monitoring and management of nodes, services and resources in smart spaces composed of low capacity nodes. A wireless sensor network software architecture is used as the baseline and is extended to a scalable smart space architecture. Discovery, monitoring and management tasks are realized by means of a Resource Manager that acts as just another node. The proposed architecture is deployed on physical wireless sensor nodes. Experimental results show that the proposed smart space architecture is indeed lightweight and suitable for very low capacity nodes.

The WASP Architecture for Wireless Sensor Networks

This paper presents some intermediate results of the EU-IST project WASP that aims to develop an integrated model for implementing applications using wireless sensor networks. In this paper we present our approach to programming sensor networks. The main contribution concerns the separation of three abstraction levels leaving more room for standardization than with current practices. In addition, we propose to program the network from an overall perspective rather than programming individual nodes. For doing this we present two programming models that complement one another. The proposed programming model is event-based, corresponding closely to the nature of wireless sensors. The paper shows our approaches by giving several examples and ends with a description of wireless sensor networks related services and gives an outlook on future work.

Integrating wireless sensor networks with CE devices for health care activity tracking in the home environment

Wireless sensing devices containing limited processing and communication capabilities are becoming available for all sorts of purposes. An important problem is to integrate networks of these sensors with the existing CE en IT infrastructure such that a) data coming out of the sensor network can be displayed and stored naturally, b) sensor networks can be programmed and configured intuitively and c) CE/IT devices can actually use the sensors for advanced applications. In this paper we describe a programming system that addresses and solves these problems.

Virtual community based secure service discovery and access for 3D video steaming applications

The Freeband I-Share project aims to define the mechanisms for trust, willingness, resource discovery and sharing mechanisms in virtual communities. To improve the secure and performance of a 3D video streaming application, which is a research vehicle of the I-Share project, we propose a virtual community based access control approach for secure service discovery and access (VICSDA) which groups services in virtual communities and only grants authenticated community members to discover and access these community services. There are two main contributions associated with this approach. First, different from most of the other access control approaches it adopts a dual access control mechanism which allows community services to define their local access control policy besides following the community membership policy. Second, behavior of these community services is monitored in order to guarantee a better QoS provision. Using this approach, the 3D video streaming application can be guaranteed with authentication and message confidentiality through the dual secure service discovery and access mechanism. Better application performance can also be achieved through the community member behavior audit.

Service and resource discovery in smart spaces composed of very low capacity nodes

This paper introduces an efficient service and resource discovery approach for smart spaces composed of very low capacity nodes. A wireless sensor network architecture is extended to a lightweight scalable smart space architecture with service and resource discovery and monitoring capabilities. A central resource manager node is proposed in the smart space architecture for this purpose.