Handover Management in NGNAbstract— Network users' demands for better, faster, and secure services continue to increase. The field of mobile networks is the most dynamic in the world of networks. Handover management in next-generation networks has been a topic of interest for many researchers in the modern era. Handoff plays a vital role in NGN networks by providing lossless connectivity from one network to another. Different algorithms and techniques are used for seamless transfer and to optimize transfer delay and data loss. Contemporary literature reveals that next-generation mobile networks consist of heterogeneous wireless networks, namely WLAN, 3G and CDMA, etc. After transferring from one network to another, MH uses the resources of the visited network. During handover, MH must support different radio access technologies. In this article, different areas of handover management are explored with emphasis on different algorithms, techniques, protocols and some proposed models. This summary work serves as a learning guide for the academic world in the field of networks. Keywords: MH (Mobile Host, FA (Foreign Agent), GA (Gateway Agent), VHO (Vertical Handoff), CAC (Call Admission Control).I. INTRODUCTION To avoid call termination and data loss during mobility, a handover mechanism is used The process of breaking connection with one base station and gaining connectivity to another base station is called MS call handoff in American English. other is known as Handoff and in British English it is known as Handover If the cell size is small, such a system will require more resources to support and coordinate..... and Rosli Salleh, “Handoff Techniques for 4G Wireless Mobile Internet,” July 29, 2007.[6] Blazej Lewcio, Sebastian Moller, Marcel Waltermann, Niklas Kirschnick, and Pablo Vidales, “Methods for Adapting Multimedia Services in Next Generation Networks” [7] Michael Mackay, Jose Moura, and Christopher Edwards, “Flexible host-based Handoff for Next Generation Networks,” April 13, 2008.[8] An IEEE 802.21 Centric Approach,” November 4, 2008.[9] Carolin Latze and Ulrich Ulte-nitsche, “Roaming, Accounting and Seamless Handover in EAP-TLS Authenticated Networks,” September 25, 2008.[10] Fast Vertical Handoff Based on Hierarchical Mobile IPv6 Using the IEEE 802.21 Media-Independent Handover Function,” January 14. 2008.