VLSI Photonic Ring Multicomputer Interconnect: Architecture and Signal Processing Performance

Authors:
Roger Chamberlain;Mark Franklin;Praveen Krishnamurthy;Abhijit Mahajan
Affiliations:
Computer and Communications Research Center, Washington University, St. Louis;Computer and Communications Research Center, Washington University, St. Louis;Computer and Communications Research Center, Washington University, St. Louis;Computer and Communications Research Center, Washington University, St. Louis
Venue:
Journal of VLSI Signal Processing Systems
Year:
2005

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Abstract

This paper presents the architectural design of a multicomputer interconnection network based on the use of optical technology. The performance of the system is evaluated on a set of signal processing applications. The interconnect uses Vertical Cavity Surface Emitting Lasers (VCSELs) and flexible fiber image guides to implement a physical ring topology that is logically configured as a multiring. Processors in the multicomputer are nodes on the ring and extremely high communication bandwidth is possible. Using the Laser Channel Allocation (LCA) algorithm and the Deficit Round Robin (DRR) media access protocol, the bandwidth available in the optical interconnect can be reconfigured to make efficient use of the interconnect resources. A discrete-event simulation model of the interconnect is used to examine performance issues such as throughput, latency, fairness, and the impact of reconfigurability.