Wireless technologies such as the Wireless Local Area Network (WLAN), the Worldwide Interoperability for Micro wave Access (Wi-MAX), and the Third-Generation (3G) mobile communications system complement each other to support a variety of services suited for the home, urban, and global environments. As roaming users expect a seamless handover (HO) experience when switching from one wireless netw...

There is a growing interest for VoWLAN (Voice over Wireless LAN) services in the advent of network convergence and user mobility. As we design a VoWLAN system capable of handling both intraand inter-handover real-time data, we should likewise consider its security architecture as compared to WLAN (Wireless LAN) systems. In this paper, we propose a method for VoWLAN that would provide handover a...

Abstract—In this paper we propose a novel Cross-layer Localized Authentication Mechanism (CLAM) to secure mobility in Next Generation Networks. The proposed mechanism integrates Proxy MIPv6 and Session Initiation Protocol (SIP) to handle the authentication locally in real-time and non-real-time communications. The design objectives of CLAM are three fold: i) handover latency is minimized by th...

Handover (HO) mechanism is one of the critical operations in Mobile WIMAX. It takes place when a mobile station (MS) moves from a serving base station (BS) to another BS.The handover procedure is comprised of several stages; network topology advertisement, MS scanning, cell selection, handover initiation and decision and network re-entry including ranging, authorization, authentication and re-r...