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CNB: A critical-network-based timing optimization method for standard cell global routing

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Abstract

A novel method, named critical-network-based (CNB) for timing optimization in global routing is presented in this paper. The essence of this method is different from that of the typical existing ones, named nets-based (NB) and critical-path-based (CPB). The main contribution of this paper is that the CNB delay reduction method is more efficient than the typical existing ones. This new method makes it possible to reduce the delay in an overall survey. Based on CNB, a timing optimization algorithm for global routing is implemented and tested on Microelectronics Center of North Carolina (MCNC) benchmarks in this paper. The experimental results are compared between this algorithm and the existing ones. The experimental results show that this algorithm is able to control the delay efficiently.

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Author information

Authors and Affiliations

  1. Department of Computer Science and Technology, Tsinghua University, 100084, Beijing, P.R. China

    Hong XianLong, Jing Tong, Xu JingYu & Bao HaiYun

  2. Department of Computer Science, Hong Kong University of Science and Technology, Hong Kong, P.R. China

    Gu Jun

Authors
  1. Hong XianLong
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  2. Jing Tong
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  3. Xu JingYu
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  4. Bao HaiYun
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  5. Gu Jun
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Corresponding author

Correspondence to Hong XianLong.

Additional information

This work was supported by the National Hi-Tech Development 863. Program of China under Grant No.2002AA1Z1 160, the National Grand Fundamental Research 973 Program of China under Grant No. G1998030403, the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.2002003008, the National Natural Science Foundation of China under Grant No.60121120706, the National Natural Science Foundation of USA under Grant No. CCR-0096383, and the Key Faculty Support Program of Tsinghua University under Grant No.[2002]4.

HONG XianLong was born in 1940. He is currently a chief professor at Department of Computer Science and Technollogy in Tsinghua University. P.R. China. His research interests include layout algorithms and systems.

For the biography ofJING Tong, please refer to P.639, No.5, Vol.18 of this journal.

For the biography ofXU JingYu please refer to P.639, No.5, Vol.18 of this journal.

For the biography ofBAO HaiYun, please refer to P.639, No.5, Vol.18 of this journal.

For the biography ofGU Jun, please refer to P.639, No.5, Vol.18 of this journal.

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Hong, X., Jing, T., Xu, J. et al. CNB: A critical-network-based timing optimization method for standard cell global routing. J. Comput. Sci. & Technol. 18, 732–738 (2003). https://doi.org/10.1007/BF02945461

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  • DOI: https://doi.org/10.1007/BF02945461

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