A Novel Boundary Router Structure Based on Circuit Switching

The average link utilization at the backbone of Internet is less than 10%. But the bandwidth that users can experience is very limited. Researchers find the switching capability of metropolitan area networks (MAN) is the major bottleneck. This paper adopts the multi-path self-routing switching structure as the switching fabric, which is interconnected by multistage sorting concentrators. With its distributing, self-routing, no internal buffer and recursive scalable attributes, a large scale boundary router based on circuit switching mode was built. It takes the IntServ model, uses TCP to setup the connection and RSVP to reserve the bandwidth resource. Theory analysis and simulations show this structure can provides end-to-end delay and jitter guaranteed QoS.