The emerging HetNet is asking for new network deployment and management methods with flexibility to handle dynamic user demands and diverse radio environments in a tired RAN infrastructure. In this Brief, we present a new framework in the study of HetNet, namely as cognitive cellular network management (CCN), by applying cognitive radio techniques. As shown in Fig. 2.1, CCN are built upon four ...

We developed an information delivery system, namely WIDE (Wireless Information Delivery Environment), in client-server architecture using 802.11b infrastructure. WIDE aims to deliver popular information services to registered mobile clients in WLAN hot spots. We present the proposed system architecture, related delivery mechanism and communication protocols. We also give a brief overview of mec...

The deployment of optical fibers with the emergence of the ATM technology which relies on a Virtual Call (VC) model is the necessary infrastructure to support modern applications such as multimedia. In this paper, we propose to extend the classical method for packet switching, namely the distance vector and the link state method to cover these new user requirements. We present an ATM routeing a...

For the Round Table participants, the idea implicit in the separation between infrastructure manager and providers of transport services in the rail sector is actually to end another form of separation, namely that between the railways and the transport market. Many experts think that a single national railway undertaking is far too rigid to be able to develop a full range of products capable o...

The current email infrastructure is burdened by multiple resource constraints and a plethora of security issues. Apart from the fact that email users are spending more time and effort sifting through unsolicited emails, more serious problems such as Phishing are on the rise. This can be attributed to a fundamental shortcoming in the current email infrastructure: a lack of an authorization frame...

The original design of the Internet and its underlying protocols did not anticipate users to be mobile. With the growing interest in supporting mobile users and mobile computing, a great deal of work is taking place to solve this problem. For a solution to be practical, it has to integrate easily with existing Internet infrastructure and protocols, and offer an adequate migration path toward wh...

Production exploitation of cardiac image analysis tools is hampered by the lack of proper IT infrastructure in health institutions, the non trivial integration of heterogeneous codes in coherent analysis procedures, and the need to achieve complete automation of these methods. HealthGrids are promising technologies to address these difficulties. This paper details how they can be complemented b...