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This position paper presents a middleware framework to support the development of context-aware adaptive communication protocols that can be reconfigured according, not only to the local context, but also to the context of the remaining remote participants. The advantages of the framework are illustrated using the concrete example of an adaptive group(More)
A total order protocol is a fundamental building block in the construction of distributed fault-tolerant applications. Unfortunately, the implementation of such a primitive can be expensive both in terms of communication steps and of number of messages exchanged. This problem is exacerbated in large-scale systems, where the performance of the algorithm may(More)
Total order broadcast protocols have been successfully applied as the basis for the construction of many fault-tolerant distributed systems. Unfortunately, the implementation of such a primitive can be expensive both in terms of communication steps and of number of messages exchanged. To alleviate this problem, optimistic total order protocols have been(More)
Establishing content-based publish/subscribe in the resource constrained and failure prone environment of Mobile Ad-Hoc Networks (MANETs) is a highly challenging task. Movement of nodes and network partitioning can require frequent and possibly expensive reorganizations of the publish/subscribe system. Many approaches towards publish/subscribe in MANETs(More)
In recent years the world has witnessed many catastrophic events where the intervention of first responders was required to manage massive disaster scenarios. To be effective, emergency management teams must be able to coordinate and communicate efficiently. To the best of our knowledge no solution has been proposed to support the communication and(More)
A difusão não selectiva (do Inglês, broadcast) pode ser vista como um caso particular de difusão em grupo, onde se pretende que todos os nós do sistema recebam a mensagem. A difusão não selectivá e um dos serviços mais importantes numa MANET já qué e usado como bloco de construção para muitos outros serviços e aplicações, incluindo protocolos de(More)
This paper addresses the problem of multipath routing in hybrid wireless mesh networks. We study the use of clustering algorithms to facilitate the discovery and deployment of non-interfering multipath routes in these settings. In this context we propose a novel combination of clustering and routing techniques aiming at minimizing interferences between(More)