Prototype Design of Timing and Fast Control in the CBM experiment

<!--HTML-->The Compressed Baryonic Matter (CBM) experiment is designed to handle interaction rates of up to 10 MHz and up to 1 TB/s of raw data generated. With free-streaming data acquisition in the experiment and beam intensity fluctuations, it is expected that occasional data bursts will surpass bandwidth capabilities of the Data Acquisition System (DAQ) system. In order to preserve event data, the bandwidth of DAQ must be throttled in an organized way with minimum information loss. The Timing and Fast Control (TFC) system provides a latency-optimized datapath for throttling commands and distribute a system clock together with a global timestamp.