Full band simulation

Hello,

I am alone doing Full band Monte Carlo simulation but I have some
problems, please give me some suggestions:
1. Which mechanism electrons use to transfer from one conduction band
to another one?
2. How can we determine the index of conduction band that electrons
belong to? (in first Brillouin zone)
3. Do I need to consider DOS together bandstructure.
4 All above related to question that how can I incorporate the band
structure into the program code. It is also a question.

Thanks a lot in advance.

Yours,
Dinh.