smart meter project guidance

hello, my project is about implementing smart meter using power line communication and i need to make one of the modems a master and the other two the slaves ( i am using kq330f power line modem) and an arduino to control it and i need to implement tdma as a collision avoidance technique so any help from where to start ? thanks a lot any help would be appreciated much.

Broadcast a clock from one Arduino/modem pair. Program the others to only transmit during their assigned time slots.