A Single Flux Quantum (SFQ) Packet Switch Unit towards Scalable Non-blocking Router

Shinichi YOROZU  Yoshio KAMEDA  Shuichi TAHARA  

IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.3   pp.617-620
Publication Date: 2002/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Superconductive Electronics)
Category: Digital Devices and Their Applications
superconducting device,  SFQ circuit,  packet switch,  switch scheduler,  

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High-end telecommunication systems in the larger nationwide networks of the next decade will require routers having a packet switching throughput capacity of over 10 Tbps. In such future high-end routers, the packet switch, which is the biggest bottleneck of the router, will need higher processing speeds than semiconductor devices. We propose a high-end router system architecture using single flux quantum (SFQ) technology. This system consists of semiconductor line card units and an SFQ switch card unit. The features of this switch card architecture are (1) using internal speedup architecture to reduce effective loads in the network, (2) using a packet switch scheduler to attain non-blocking characteristics. This architecture can expand the switching capacity to a level greater than tens of Tbps scale, keeping with non-blocking characteristics.