International Journal of Advanced Research in Computer Engineering & Technology
One of the prime objectives in future mobile communications is implementing seamless roaming between heterogeneous wireless networks. 3G Cellular network and Wireless LAN will complement each other to provide ubiquitous high speed wireless Internet connectivity to mobile users. Seamless means smooth transition from one network to another. The main criteria for seamless movement are hand off. With seamless roaming, the user will not perceive any delay on interruption of service. Even be aware of any change in the network and will not required interacting with the system to enable hand off.