The IEEE 802.11 based wireless LAN (WLAN) is most widely used for the real time communication such as Voice over IP (VOIP) video conferencing and etc. As the wireless internet access is increasing day by day by the combination of different small regions which are served by one operator or one Access Terminal. So there is the problem of mobility that a Mobile Node (MN) may move from one network to other network, also there is the problem of connectivity. To maintain the connectivity of a established call betwe…
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