A generic architecture for 'always best connected' UTMS/WLAN mobile networks Online publication date: Fri, 18-Jan-2008
by Vangelis Gazis, Nancy Alonistioti, Lazaros Merakos
International Journal of Wireless and Mobile Computing (IJWMC), Vol. 2, No. 4, 2007
Abstract: The 4G mobile era will be based on a heterogeneous infrastructure comprising different wireless (and wired) systems in a complementary manner, where users will enjoy ubiquitous access to applications in an 'Always Best Connected' (ABC) – mode that utilises the most efficient combination of systems available (e.g. UMTS and WLAN). We analyse the 'ABC' concept in an interworked UMTS/WLAN network context and reveal important issues. Next, we identify major requirements of the 'ABC' capacity, point out the limitations of UTMS/WLAN standards and discuss key enabling technologies and research efforts. We develop an application model for 'ABC' and analyse its complexity proving that, in principle, being 'ABC' translates to a family of NP-hard problems. Next, we present the design of an object-oriented UML real-time model for an 'ABC' system and provide preliminary results from simulation scenarios. In conclusion, we summarise the advantages of our 'ABC' model and provide directions for future work.
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