关键词: 三维片上网络, 超立方体裂变, 拓扑结构, 平均延时

Abstract: Three-dimensional network-on-chip is an important research direction to solve the bottleneck of network- on-chip. 3D network topology makes one of the key problems. In order to solve the problem of rapid increase of node degree and communication bottleneck in high-dimensional hypercube topology, a high-dimensional hypercube fission topology is proposed in this paper. The topology has the advantages of short network diameter and strong scalability under the same network scale. In this paper, the simulation experiment is done with five-dimensional hypercube fission topological structure as an example, and compared with 3D Mesh topology structure analysis: when two topologies both reach saturation under uniform traffic pattern, the throughput of five-dimensional hypercube fission topology upgrades by 300%; the average latency degrades by 85.1%; the average hops decrease by 21.5%. Compared with 3D Mesh, the average latency of five-dimensional hypercube fission topology degrades by 79.1%; the average hops decrease by 13.3% under localized traffic pattern. Simulation results show that the proposed network topology not only retains the advantages of the original hypercube topology, but also solves the communication bottleneck of high-dimensional hypercube topology.

Key words: three-dimensional network-on-chip, hypercube fission, topology, average latency