Diogo Nuno Pereira Gomes

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—As the number of environmental sensors grows, it becomes increasingly difficult to manage, store and process all these sources of information. Several context representation schemes try to standardize this information, however none of them have been widely adopted. Instead of proposing yet another context representation scheme, we discuss efficient ways to(More)
Next generation wireless communication systems aim to handle diverse types of services across different types of access technologies in a seamless way. This paper proposes a next generation network architecture and evaluates possible associated signaling strategies, focusing in network-level QoS support aspects. The scenarios handled cover(More)
The 3GPP Multimedia Broadcast Multicast Service (MBMS) aims to introduce group communications into the 3G networks. One of the current key challenges is how to evolve these incipient features towards the ''beyond 3G vision'' of a converged global network where multimedia content can be delivered over one or more selected broadcast transport bearers. This(More)
This article presents field evaluation results of an IP-based architecture for heterogeneous environments, covering UMTS-like TD-CDMA (Time Division-Code Division Multiple Access) wireless access technology, wireless and wired LANs, that has been developed under the aegis of the IST Moby Dick project. The architecture treats all transmission capabilities as(More)