Developing a new method to improve the QoS for VoIP traffic in MANET

My topic which is already Got approval : Developing a new method to improve the QoS for VoIP traffic in MANET and i will give some explanation about it : 1- by using network simulation version 2 (NS2) i will simulate my scenario and study the performance for my result 2- by using Graph theory and Nearest Neighbor algorithm to find the best bath between source and destination in Mobile Ad-hoc Network 2- use SIP protocol and R-factor to investigate the bath between the source and the destination, and depend on R-factor if the value for the R-factor increase change the path to alternative path with lower value for R-factor