Final Year Project

Hi.I'm a Computer Engineering final year student from Africa.I've come up with this as an idea for my final year project;

Design and Evaluation of VOIP using ATM protocol

I wanna design an ATM protocol for a VOIP network using NS and I wanna run a performance evaluation against tha existing standard for VOIP networks which is SIP.
Could somone pls look for any information and litreature review on the above subject and lemme know?Thank you.