Hello Hadeel S. Abed,

Network simulators, like NS2, OPNET, and NetSim can be used to simulate IEEE 802.15.4 ZigBee networks.

I would like to share some helpful links for you as follows:

https://en.wikipedia.org/wiki/NetSim

http://www.iject.org/vol34/1/stephen.pdf?trk=profile_certification_title

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6043770&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F6032139%2F6043654%2F06043770.pdf%3Farnumber%3D6043770

Hello,

Please refer the above datasheet for more clarification

Can use High end FPGA with Modelsim tool