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...