George Lampropoulos

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The integration of existing cellular systems with new wireless access technologies, such as wireless LANs, has attracted considerable attention during the past few years. The challenges to be addressed include authentication, security, QoS support and mobility management. Efficient mobility management, and especially handover management, is considered as(More)
The next generation mobile system is expected to support the continuous increase of users requirements. Through the high flow rates of these networks, new applications constraints are more complex and may be change dynamically and rapidly for wireless systems. The service heterogeneity provided by these applications has a great influence on system(More)
The scarce available bandwidth and the unpredictable, variable bit rate traffic in modern packet-switched wireless LANs, require an efficient channel allocation scheme. In this paper we make an overview of traditional call-by-call Dynamic Channel Assignment (DCA) methods and propose a novel DCA method that aims at assigning channels in a more dynamic way,(More)
he mobile Internet technology and its related applications and services have progressed greatly in the past few years, and now we see many tiny terminals with integrated multifunction chips in the market. However, at the same time we observe a kind of separation between the technology development and the common Internet applications customers usually use.(More)
Lately, cross-layer design in wireless networking has met significant interest. Thus, in the recent literature many cross-layer designs for the performance improvement of a variety of wireless communication networks can be found. In this paper, we describe the notion of cross-layer design, note its significance for wireless communication networks and(More)