MOBILE-CONTROLLED TIGHT COUPLING MECHANISM FOR INTERNETWORKING ARCHITECTURE OF UMTS AND WIRELESS LAN NETWORKS

The Fourth Generation of Mobile and Wireless Networks (4G MWNs) is presume
to be a unified network which comprises of numerous existing MWNs such as
Wireless Local Area Network (WLAN), Global System for Mobile (GSM), Universal
Mobile Telecommunications System (UMTS), Worldwide lnteroperability for
Microwave Access (WiMAX), and satellite network etc, In 4G, MWNS the Mobile
and Wireless Users (MWUs) are authorized to roam across assorted integrated
MWNs, To keep the seamless call continuity in such an internetworking environment,
is the most challenging issue, The literature revealed that when the MWU switches
the active call between the dissimilar MWNs, the loose coupling mechanism lack in
providing the seamless mobility, Conversely, by implementing significant
modifications in the existing network architectures and protocols, the very tight
coupling mechanisms efficiently address the seamless mobility.