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Tao He
National Digital Switching System Engineering Technological Research Center, Zhengzhou

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Improving Negative First Routing Algorithm with Load Equalization of Virtual Channel in NoC Tao He; Xingming Zhang; Tao Qin
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 11: November 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This article study chip communication mechanisms deeply based on the NoC (Network on Chip) technology and a load equalization of virtual channel (LEVC) routing algorithm for Torus networks is proposed, which splits the physical network into virtual networks in the case of physical link load equalization. According to the predefined rules, packets use different virtual networks on their way to destinations and network achieve no deadlock, no livelock purpose. The algorithm study load equalization on the level of virtual channel by introducing the random factor. Simulation results show that compared with the negative first for Torus networks algorithm, the network performance can be dramatically improved for different traffic pattern by selecting a specific value of the random parameter respectively. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3483 
Establishing Performance Evaluation Model with Queuing Theory in NoC Tao He; Fucai Chen; Tao Qin
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 10: October 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The transmission delay is an important index of the system performance of NoC (Network on Chip). Although the method of simulation-based can get accurate transmission delay, the simulation requires time consuming and a large number of test vectors. Especially in the study of some algorithms, such as mapping algorithms, buffer allocation algorithm, the simulation method is not applicable. To solve the above problems, the paper uses queuing theory to study the establishment of a NoC delay model. The model considers the limited buffer of routing unit and virtual channel technology for network transmission delay and proposes solving algorithm of the delay model based on reverse deduction method. The simulation shows that this model used to analyze the application-specific data transmission delay has smaller average error (reduced by 8%) and higher evaluation efficiency (increased by more than 30 times), which provide designers an efficient method of performance evaluation. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3395
Co-Authors Fucai Chen Tao Qin Xingming Zhang