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With the escalation of the IEEE 802.11 based wireless networks, Voice over IP and analogous applications are also used over wireless net-works. Recently, the wireless LAN systems are spaciously deployed for public internet services. In public wireless LAN systems, reliable user authentication and mobility support are indispensable issues. When a mobile device budges out the range of one Access Point (AP) and endeavor to connect to new AP, it performs handoff. Contemporarily, PNC and SNC were proposed to propagate the MN context to the entire neighboring AP's on the wireless network with the help of neighbor graph. In this paper, the authors proposed a Non-overlapping AP's Caching Scheme (NACS), which propagates the mobile node context to those AP's which do not overlap with the current AP.
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