A double-layer sparse honeycomb topology for NoC

Network-on-chip (NoC) is emerging as an effective architecture which address the shortcomings of traditional bus-based System-on-chip (SoC). Since its better properties, such as the lower power consumption, smaller size and higher scalability, mesh is often regarded as an effective topology for NoC design. In this paper, we propose a double-layer sparse honeycomb topology as a terrific design option gaining advantages of degree, diameter, and network cost which is vital to network performance. As a result of the fact that 3D IC has developed as a perspective technique for network topology, we transform the sparse honeycomb topology into rectangular brick shape that it is feasible to be implemented on the chip, and double the planar sparse honeycomb structure to obtain this advantageous 3D topology. Based on the addressed topology, a brief routing algorithm which is easy and improved from the dimension order routing algorithm is carried out. The 4×4 router for the new topology has been implemented and simulated. Thus, the degree of routers is reduced and the utilization is increased.