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Inventi Impact - Computer Networks & Communications

Articles

  • Inventi:ecnc/79/14
    AN ENERGY-EFFICIENT LOW-POWER LOW-COST OPTICAL ROUTER FOR OPTICAL NETWORK-ON-CHIP FOR FUTURE MULTI PROCESSOR SYSTEMON- CHIP
    Arnov Mukherjee, Bharati B Sayankar

    With the development of multi-processor system-on-chip (MPSoC) in recent years, the intra-chip communication is becoming the bottleneck of the whole system. Current electronic network on-chip (NoC) designs face serious challenges, such as bandwidth, latency and power consumption. Networks-on-chip (NoCs) can improve the communication bandwidth and power efficiency of multiprocessor systems-on-chip (MPSoC). However, traditional metallic interconnects consume significant amount of power to deliver even higher communication bandwidth required in the near future. Optical interconnection networks are a promising technology to overcome these problems. In this paper, we studied the routing problem in optical NoCs with arbitrary network topologies. Traditionally, a minimum hop count routing policy is employed for electronic NoCs, as it minimizes both power consumption and latency. However, due to the special architecture of current optical NoC routers, such a minimum-hop path may not be energy-wise optimal. Using a detailed model of optical routers we reduce the energy-aware routing problem into a shortest-path problem, which can then be solved using one of the many well known techniques. By applying our approach to different popular topologies, we showed that the energy consumed in data communication in an optical NoC can be significantly reduced. We also proposed the use of optical burst switching (OBS) in optical NoCs to reduce control overhead, as well as an adaptive routing mechanism to reduce energy consumption without introducing extra latency. Our simulation results demonstrated the effectiveness of the proposed algorithms.

    How to Cite this Article
    Cite this article as: Arnov Mukherjee, Bharati B Sayankar. An Energy-efficient Low-power Low-cost Optical Router for Optical Network-on-Chip for Future Multi Processor System-on-Chip. Inventi Impact: Computer Networks and Communications, 2014(4):191-197, 2014.
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