A study of multiple high speed data networks and seamless vertical handoff for uninterrupted internet access to a hybrid network
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WiMAX is a wireless technology that provides broadband service to the residence or office organizations in economical manner by using many protocols, such as, OLSR, DSDV and DSR. WiFi is wireless network technology that provides internet access by covering a limited range of area using Media Access Control Protocol named CSMA/CA. 3G and WLAN are the integrated access that provides users with benefits and more flexibility. Handoff is a networking system that automatically shifts or changes active connection from one to another while user is in motion. Handoffs are known as horizontal or vertical (VHO) in homogeneous or heterogeneous Wireless Networks. In traditional handovers, algorithm depends on the quality of link and received signal strength. However, these factors are not enough for VHO because of the complexity of network configuration as it is applied in heterogeneous network. In addition, VHO depends on a policy based network structure where various factors are considered like types of services, Quality of service (QoS), security, etc. A Hybrid network or Interworking Architecture is usually a network construction infrastructure that works together for multiple technologies such as WiMAX, WLAN, and 3G etc. which is motivated to approach smoother service to users with its enriched communication system. In our work we are going study multiple High speed data networks, individually and as a hybrid network and also compare different features to get the best performance for seamless Vertical Hand-Off.