CDMA versus TDMA Transfer over Shared Bus

CDMA interconnect is a new interconnect mechanism for SoC design. This paper presents how a multiprocessor system can benefit from the use of concurrent data transfers: CDMA interconnect has been adopted to implement the shared bus of a multiprocessor system. Unlike the conventional TDMA bus-based multiprocessor system that shows degradation in performance as the number of processing cores increases, the proposed CDMA bus-based multiprocessor system shows higher performance up to 188 percent for four processors. The obtained results show that increased data transfer latencies involved by CDMA data transfer are compensated by simultaneous master-slave transfers.