I also ever though about using polling technique as Jerson said. It looks a lot simple and fast enough if could run on 460kbps. But I really want to know how to build 460kbps on AT89C2051?
wrong chip? you want the moon (200 nodes very fast and distance) and do not want to pay sixpence. That does not work, you can have either, but not both. I have no idea if the Arghmel chip can run 460, but I would guess it can with a clock at an 11.0592 multipke and close to max osc freq.

And if I use polling, how about if 1 of the node "gone"? use timeout?
if you implement a scheme as I suggested above properly coded, it takes 1 byte time to detect 'node gone'

and how to make algorithm that could increase the polling address node?
did you even read my post???

if I wish to make the nodes have plug n play feature)
I do, using DS2411

Erik