Network on chip and network on chip systems

The present invention relates to a network on chip of the present invention. The network on chip according to the present invention comprises: a plurality of local switch routers for dividing a plurality of IPs into a plurality of clusters having a predetermined number of IPs, and connecting the IPs configured in the plurality of clusters in a star topology structure; One or more upper switch routers that connect local switch routers in a star topology; a plurality of local switch routers and one or more upper switch routers form a vertical hierarchy, and ring routers between switch routers that form the same hierarchy. Characterized in that connected to the structure. According to the present invention, the average hopping latency required for data communication between IPs can be reduced, and the overall data bandwidth can be increased as compared with the existing hierarchical star topology. In addition, the number of cycles and packet buffering required for data movement can be reduced, thereby minimizing execution time and energy consumption required for data communication. Network-on-Chip, topology, ring topology, hierarchical star