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Nonlinear adaptive filters based on a variety of neural network models have been used successfully for system identification and noise-cancellation in a wide class of applications. An important problem in data communications is that of channel equalization, i.e., the removal of interferences introduced by linear or nonlinear message corrupting mechanisms,(More)
The introduction of the ATM technology in wireless CPN environments necessitates the design of mobility protocols, since B-ISDN signaling was not developed to support terminal movement. The functionality of mobility protocols consists of the procedures for handover (rerouting of active data connections to a new cell) and for location management (tracking(More)
During the past years, several attempts have been made to develop functionality for mobility management support and QoS provision in the realm of the IP networks. Since IP was not designed to support such functionality, new protocols have been specified and implemented to tackle these issues. Mobile IP is currently the dominant protocol that allows users to(More)
In our everyday life, we frequently experience cases where persons group together. In those cases, context-aware systems capture and process identical context. Therefore, the need to collaboratively address Context Awareness (CA) emerges. In the considered setting, ad hoc networking between mobile nodes enables the exchange of information, thus, CA is(More)
Mobile hosts utilize Mobile IP to retain connectivity while roaming in various networks, and acquire new IP addresses through the mechanisms Mobile IP supports. Today, one of the most demanding application requirements is QoS support. RSVP, the protocol implementation of the IETF Integrated Services Architecture, cannot handle hosts that change their IP(More)
In this paper * we discuss a system that exploits observations derived from sensors, in order to estimate a key factor for pervasive computing and context aware applications: the location of a user. The term " sensors " includes Wi-Fi adapters , IR receivers, etc. The core of the system is the fusion engine which is based on Dynamic Bayesian Networks(More)
The theoretical analysis of a cross-layer mechanism for improving the quality of service of real-time applications in wireless networks is presented. The mechanism coordinates adaptations of the modulation order at the Physical layer and the media encoding mode at the Application layer, to improve packet loss rate, throughput and mean delay. With the use of(More)
proposed based on multi-sensor technology and neural networks (NNs). The sensed data include environmental temFires are a common, disastrous phenomenon that conperature, smoke density and CO density. The use of NNs stitutes a serious threat. Thus, early detection is of great for automatic detection of smoke is also proposed in [10]. importance as the(More)