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MACsim is a MAC (Medium Access Control) protocols simulator for CDMA (Code Division Multiple Access) systems used in mobile communications of third generation. Currently it only supports the WISPER protocol.
XS0 is a mixed network/physical-medium simulator. Its main use is for co-design of physical, MAC, and higher layers over different transmission (radio,cable,optical), multiplexing (cdma,fdma,tdma), and user application (m/s,p2p) technologies.