you may use and look CloudSim.

Have you tried basic cloud simulators like Cloudsim https://code.google.com/p/cloudsim/ ? Just a suggestion, but please provide a detailed question for your research.

for questions on cloudsim : https://code.google.com/p/cloudsim/wiki/FAQ

Cloudsim may be usefull

Another simulator is DCSim ... contact Michael Tighe at [email protected] -- though it is a little more focused on a data center environment. There are papers on DCSim in IM2013 and DMTF 2012

Thanks all

Geodistributed 

cloudsim