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High Performance Advanced P-OCI Crossbar with PaCC Codec

: On-chip communications profoundly impact the overall area, performance and power consumption of modern System on Chips. Developing an efficient high performance on chip interconnects has been of paramount importance for the parallel and high performance computing technologies. Network on Chips are the most scalable interconnection paradigm that is capable of addressing various application needs and meet different performance requirements. Overloaded CDMA is a well known medium access technique deployed in wireless communication to increase the interconnect capacity. The Walsh spreading codes enables adding more number of non orthogonal spreading codes to increase the interconnect capacity. In this paper, a hybrid encoder used in the crossbar can develop both the orthogonal and nonorthogonal spreading. The orthogonal and overloaded decoders are used to decode the data. The data spreading and despreading are parallelized in the P – OCI crossbar. A parallel compare and compress (PaCC) architecture is used to reduce the excess area need to store the message data. Codec is the key component that is used in the PaCC architecture which effectively balances the area and performance. The parallel Run Length Encoding scheme observes k bits in parallel. If they all are 0 or 1, all the k bits are bypassed in one clock cycle. The value of k affects the compression speed by impacting the bypass opportunity. This helps to improve the overall area, power and performance along with increase in bandwidth. The design is simulated using Xilinx ISE Design Suite 14.5. The results show that the PaCC Codec based P-OCI attains greater bus capacity, less power consumption and efficient in area when compared with the normal P-OCI