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Wireless Sensor Networks are characterized by having specific requirements such as limited energy availability, low memory and reduced processing power. On the other hand, these networks have enormous potential applicability , e.g., habitat monitoring, medical care, military surveillance or traffic control. Many protocols have been developed for Wireless(More)
Many issues still remain to be addressed in order to achieve acceptable security in Wireless Sensor Networks (WSNs). This necessity, together with the adoption of IPv6 on WSNs being defined at the 610wpan lvorking group of the IETF, motivates our investigation on the feasibility of the application of IPSec on sensor nodes. IPSec is already part of IPv6,(More)
Although, traditionally, mobility has not been supported in Wireless Sensor Networks, many applications in these environments need to interact with each other in highly dynamic scenarios, where configurations can vary from static to dynamic. Sensors phenomena, observers and even the network itself can present different levels of mobility. This mobility in(More)
In a world where networking services are increasingly being provided by service overlay networks, management of these services at overlay level is becoming crucially important. This paper presents an architecture for services management in P2P Service Overlay Networks (SON). The architecture, named OMAN, takes into account the formation of the P2P SON(More)
Cross-domain network and service management is still a challenging task. Most network management solutions that exist today are only applicable to single, homogeneous domains. Due to their distribution and technology-independence, P2P overlays have very good potential to boost inter-domain network and service management. The proposed work intends to explore(More)
This paper presents a performance evaluation in the context of the Aggregation Service (AgS). The AgS is a P2P overlay-tier whose purpose is to aggregate the services and service components maintained by service providers in a P2P Service Overlay Network (SON). The performance evaluation takes into account two metrics: 1) the average path length, and 2) the(More)
Real-time multimedia will be among the most important applications in next generation networks. However, efficiently managing the delivery of these applications to guarantee Quality of Experience (QoE) to end-users facing network resources limitation and heterogeneity of networks is a challenge. This paper first explores key requirements to provide QoE(More)
Mobile Code is an emerging paradigm that is gaining momentum in several elds of application. Network Management i s a p o-tential area for the use of this technology, provided it will be able to interoperate with well established solutions for Network Management. This paper presents the integration a classic NM protocol, like SNMP, into a platform of Mobile(More)
Over the last couple of years we have been working on the development of mobile agents systems and its application to the areas of telecommunications and network management. This work path produced positive results: a competitive mobile agent platform was built, the run-time benefits of mobile agents were proved, and our industrial partners have developed(More)
In this paper we analyse the provision of enhanced communications between vehicles. It is expected that vehicles will have several communication devices, and that a specialised node will provide external connectivity to these devices, i.e. the devices in the vehicle form a Mobile Network. We propose the use of Network Mobility communication solutions for(More)