Self-routing space switch network comprising fast and uniform switch elements
H. Obara, Hitoshi Uematsu, Satoru Okamoto, Haruhiko Matsunaga · Electronics Letters · 1990
The letter presents a method by which to construct a fast N × N self-routing space switch network with identical 2 × 2 switch elements. This network is nonblocking and employs O(N log3N) switch elements; each element uses just two bits of the output port address for switching control.