Media independent handover-based network system having a vertical handover capability and vertical handover method thereof

摘要

A heterogeneous network system performs a vertical handover based on media independent handover (MIH) between networks having different technologies, e.g. a WiMAX (Wireless Broadband Internet) network (or a WiBro (Wireless Broadband Internet)) and a WLAN (Wireless LAN) network. The heterogeneous network system cyclically acquires neighboring network information in advance through a media independent handover server, and performs new address (NCoA) generation prior to a handover. And then DAD (Duplicate Address Detection) and BU (Binding Update) are performed. This way, the handover delay time is minimized.