AWG-Based Non-Blocking Clos Networks

Modelling the Blocking Behavior of Multicast Clos Networks

This paper considers three-stage switching networks able to support multicast traffic, i.e. connections in which one inlet is connected to more than one output at the same time. The nonblocking conditions for this network are studied under the assumption of absence of any optimized routing of the connections inside the structure (the so-called strict-sense nonblocking networks). An analytical m...

Lower Bounds for Wide-Sense Non-blocking Clos Network

The 3-stage Clos network is generally considered the most basic multistage interconnecting network (MIN). The nonblocking property of such network has been extensively studied in the past. However, there are only a few lower bound results regarding wide-sense nonblocking. We show that in the classical circuit switching environment, to guarantee wide-sense nonblocking for large r, 2n− 1 center s...

Multirate Clos Networks

The Clos networks are a class of multistage switching network topologies that provide alternate paths between inputs and outputs, making it possible to minimize or eliminate the blocking that can otherwise occur in such networks. In his seminal paper in the Bell System Technical Journal in 1953, Charles Clos showed how these networks could be configured to make them nonblocking and effectively ...

Comparison of Single-Hop and Multihop AWG Based WDM Networks

Performance of Clos Multicast Networks

A three-stage circuit-switched Clos network, under various routing control strategies is considered for multicast operation. It was found that, under certain assumptions, this network become nonblocking as the number of middle switches increases. Also ,it was demonstrated that blocking probability can be reduced by certain modifications applied to its links. Key-Words: Multicast, simulation, bl...