Optical Router Architecture

Tech ID: 11240 / UC Case 2003-458-0


All-optical cariable buffer queuing.

Full Description

Researchers at the University of California, Davis have developed an optical router architecture that takes advantage of two classes of all-optical variable queuing buffer components. This provides an optical router architecture with all-optical variable input-queuing or an output-queuing buffer that may boast the excellent scalability, provide versatile wavelength-aware queuing, buffering, arbitrating and load-balancing functions with the QoS/CoS (Quality of Service/Class of Service) capability for the optical packets in a wavelength-division multiplexing (WDM) communication network. Furthermore, the optical router architecture achieves low packet loss rate and eliminates the head-of-line blocking effect without introducing the internal switch fabric speed-up, which are critical technical difficulties while building a large traditional crossbar-based input/output-buffered electronic router.


  • Interface local area networks (LAN) with the supernet
  • Buffering queue implemented as optical random access memory
  • Reduce packet loss in optical networks


  • Low packet loss
  • Low end-to-end delay and jitter
  • High scalability
  • Eliminates Head-of-Line blocking effect without using internal switch fabric speed up

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 7,313,329 12/25/2007 2003-458


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  • Yang, Haijun
  • Yoo, S.J. Ben

Other Information


packet loss, scalability, optical, router, queue, buffer, memory, switching 

Categorized As