— We present SoCExplore, a framework for fast communicationcentric design space exploration of complex SoCs with networkbased interconnects. Speed-up in exploration is achieved through ion of computation as a high-level trace, and accuracy is maintained through cycle-accurate interconnect simulation. The flexibility offered allows for fast partition/mapping and interconnect design space exploration. Error analysis of such frameworks is non-trivial and is presented for the first time. As a case study, a speed-up of 94% over architectural simulation is reported for the MPEG application.