  The Compressed Baryonic Matter spectrometer (CBM) is a future fixed-target
heavy-ion experiment located at the Facility for Anti-proton and Ion Research
(FAIR) in Darmstadt, Germany. The key element in CBM providing hadron
identification at incident beam energies between 2 and 11 AGeV (for Au-nuclei)
will be a 120 m$^2$ large Time-of-Flight (ToF) wall composed of Multi-gap
Resistive Plate Chambers (MRPC) with a system time resolution better than 80
ps. Aiming for an interaction rate of 10 MHz for Au+Au collisions the MRPCs
have to cope with an incident particle flux between 0.1~kHz/cm$^2$ and
100~kHz/cm$^2$ depending on their location. Characterized by granularity and
rate capability the actual conceptual design of the ToF-wall foresees 6
different counter granularities and 4 different counter designs. In order to
elaborate the final MRPC design of these counters several heavy-ion in-beam and
cosmic tests were performed. In this contribution we present the conceptual
design of the TOF wall and in particular discuss performance results of
full-size MRPC prototypes.
