Improved RPL objective function using Contiki Cooja

I need help in implementation of my project on improved RPL protocol for IoT. RPL is a routing protocol for Low-power and Lossy networks (LLNs) consisting of resource-constrained sensor devices for Internet of Things. Contiki is an Operating system for the resource-constrained devices. I need help in implementation of the modified Objective Function (OF) in Contiki and also its simulation in Cooja simulator. Also evaluate its performance against the standard RPL protocol for different parameters like PDR, packet loss, energy consumption etc. If someone has done similar projects before, please contact me urgently. I can share the document I have created containing the problem description and algorithms.