H-Torus拓扑结构等分带宽的计算

针对H-Torus拓扑结构,给出两种确定该拓扑结构等分带宽上、下界的方法.这些方法同样适用于2D Torus拓扑结构.还提出了H-Torus结构等分带宽的精确求解方案,但是该算法的复杂度过大,只适用于网络规模较小的情况.实验表明,H-Torus拓扑结构的等分带宽大于同等规模的2D Torus结构,更有利于提高路由器的吞吐率.与现有的研究结果相比,所提出的等分带宽上、下界在精度上有了较大的提高,这为可扩展路由器的性能评估提供了有力的支持.     

Research on Next-Generation Scalable Routers Implemented with H-Torus Topology

The exponential growth of user traffic has been driving routers to run at higher capacity. In a traditional router, the centralized switching fabric is becoming the bottleneck for its limited number of ports and complicated scheduling algorithms. Direct networks, such as 3-D Torus topology, have been successfully applied to the design of scalable routers. They show good scalability and fault tolerance. Unfortunately, its scalability is limited in practice. In this paper, we introduce another type of direct network, called H-Torus. This network shows excellent topological properties. On its basis, the designs of line card and routing algorithms are introduced. Extensive simulations show that the routing algorithm is very important in such a system and results in low latency with high throughput.