Performance optimization in Torus-based optical networks-on-chip

• Published in: 2014 IEEE 20th International Conference on Embedded and Real-Time Computing Systems and Applications pp. 1 - 6
• Main Authors: Weihua Xu, Yiyuan Xie, Hongjun Che, Weilun Zhao, Yexiong Huang, Xin Li, Jiachao Li
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-08-2014
• Subjects: Crosstalk; crosstalk noise; Optical crosstalk; Optical fiber communication; Optical noise; Optical waveguides; Optimization; Signal to noise ratio; Torus-based ONOCs
• ISSN: 2325-1271
• DOI: 10.1109/RTCSA.2014.6910561

In this paper, the insertion loss and crosstalk noise of M × N Torus-based optical networks-on-chip (ONoCs) is systematically analyzed, which caused performance degradation. The proposed analysis model can be applied to arbitrary 5×5 routers and Torus-based ONoCs. When traditional non-blocking five-port optical routers used in the original Torus structure, it's suffered lager Bit Error Rate (BER) in a small scale. The router optimization and angle optimization method is used for achieving a better quality of network communication and performance improvement. The numerical results show the signal-to-noise ratio (SNR) of the worst-case transmission link in Torus-based ONoCs with certain size. When the network scale of Torus-based ONoC is 6×6 and the input power is 0 dB, the SNR of Torus-based ONoC using Crux router is 21.66 dB, which is 7.06 dB higher than optimized Crossbar router. With angle optimization further used in router level and network level, the SNR can reach to 23.87 dB. Moreover, we also find that a better SNR can be got with M gradually close to N .