Dimitrios J. Vergados

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Handoff is a key element in wireless cellular networks in order to provide Quality of Service (QoS) to the users and to support users’ mobility. Handoff failure will result in the forced termination of an ongoing call. From the user’s point of view, the service of a handoff request is more important, as the forced termination of an ongoing call is more(More)
Medical broadband applications have attracted increased attention in the recent years. Also, the tremendous growth of wireless technologies has introduced the potential of continuous healthcare monitoring for mobile patients. The bandwidth requirements and the real-time nature of medical applications introduce the need for Quality of Service (QoS)(More)
Since the population of elderly people grows absolutely and in relation to the overall population in the world, the improvement of the quality of life of elderly people at home is of a great importance. This can be achieved through the development of generic technologies for managing their domestic ambient environment consisting of medical sensors,(More)
Although MPEG-Dynamic Adaptation Streaming over HTTP (MPEG-DASH) eliminates data packet loss, based on the rate adaptation strategy adopted by the user and the network conditions, still playback interruptions may not be avoided. In this paper an algorithm for rate adaption in MPEG-DASH is proposed that employs fuzzy logic to estimate the resolution of the(More)
0020-0255/$ see front matter 2009 Elsevier Inc doi:10.1016/j.ins.2009.08.003 * Corresponding author. E-mail addresses: ioanna@medialab.ntua.gr (I. dpolemi@unipi.gr (D. Polemi), loumos@cs.ntua.gr (V One of the main challenges that organizations face nowadays, is the efficient use of individual employee intelligence, through machine-facilitated understanding(More)