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Massively parallel processor networks with optical express channels

Patent ·
OSTI ID:872475
 [1];  [2];  [3]
  1. Pleasanton, CA
  2. Tracy, CA
  3. Castro Valley, CA
+ Show Author Affiliations
An optical method for separating and routing local and express channel data comprises interconnecting the nodes in a network with fiber optic cables. A single fiber optic cable carries both express channel traffic and local channel traffic, e.g., in a massively parallel processor (MPP) network. Express channel traffic is placed on, or filtered from, the fiber optic cable at a light frequency or a color different from that of the local channel traffic. The express channel traffic is thus placed on a light carrier that skips over the local intermediate nodes one-by-one by reflecting off of selective mirrors placed at each local node. The local-channel-traffic light carriers pass through the selective mirrors and are not reflected. A single fiber optic cable can thus be threaded throughout a three-dimensional matrix of nodes with the x,y,z directions of propagation encoded by the color of the respective light carriers for both local and express channel traffic. Thus frequency division multiple access is used to hierarchically separate the local and express channels to eliminate the bucket brigade latencies that would otherwise result if the express traffic had to hop between every local node to reach its ultimate destination.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
DOE Contract Number:
W-7405-ENG-48
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5943150
OSTI ID:
872475
Country of Publication:
United States
Language:
English

References (4)

Express cubes: improving the performance of k-ary n-cube interconnection networks journal January 1991
Selective-broadcast optical passive star comer design for dense WDM networks journal May 1991
Scalable multihop WDM passive ring with optimal wavelength assignment and adaptive wavelength routing journal June 1996
Star coupler based WDM switch employing tunable devices with reduced tunability range journal January 1992

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