A Code-transparent MAC Simulator for WARP Andreas Schumacher RWTH Aachen University The Wireless Access Research Platform (WARP) allows researchers to evaluate their developed protocols under real world conditions. This hardware platform is built around an FPGA. As is the case with every software, the implementation process of the network protocols requires debugging steps. Unfortunately, the WARP devices offer only limited support, especially in case if time-critical aspects of protocols need to be examined. In this talk we present a framework solving that problem. It enables a simulation of the protocol functions that are executed in the processor cores of the FPGA. Running these functions in a transparent way avoids porting the source code and allows the researcher to study the actual implementation in a controllable and reproducible environment. The simulation engine further enables performance evaluations of the protocol for larger networks, in case more stations are required than physically available.