The enormous success of the Internet has led to a great revolution in Telecommunication. Today, Telecommunication has become an indispensable part of everybody's day-to-day activities. Various types of services like online video, online music, fast video streaming, video conferencing, VoIP, etc. are becoming a part of daily and routine activities. These applications demand high quality and congestion free networks particularly for voice and real time sessions .This can be possible when the key focus for telecommunication area will been on the Next Generation Wireless Networks (NGWNs). The idea behind this book is to Judge the key parameters of Next generation wireless networks so as to get a good network quality and a congestion free next generation network. The aim is achieved by analyzing various quality parameters like Jitter, Mean opinion Score(MOS),End to End Delay, etc. of the future networks. Next Generation Systems are advanced, fast and has several applications. The suggestions given in this book when implemented will definitely improve the performance of the Future Generation Networks by 90-95%.