NDLI: A three-layer over-the-cell multi-channel routing method for a new cell model

Content Provider	IEEE Xplore Digital Library
Author	Tsuchiya, M. Koide, T. Wakabayashi, S. Yoshida, N.
Copyright Year	1995
Description	Author affiliation: Fac. of Eng., Hiroshima Univ., Japan (Tsuchiya, M.; Koide, T.; Wakabayashi, S.)
Abstract	We present a new cell model for over-the-cell routing and a new over-the cell multi-channel routing method. In the proposed new cell model, terminals can be placed arbitrarily on the second layer of a cell so that each cell does not require the extra routing region on the first layer of a cell to align terminals. Unlike conventional cell models, some parts of the second layer are also utilized for the intra-cell routing in order to reduce the chip area. Therefore the size of the proposed cell model can be smaller than that of a conventional cell model. The proposed method consists of three phases. In order to utilize the proposed cell model, in phase 1, we simultaneously handle all channels to determine the most effective routing patterns from the set of possible routing patterns to minimize the chip area. In phase 2, for the effective routing patterns of nets selected in phase 1, over-the-cell routing nets are selected by a new greedy algorithm considering obstacles on over-the-cells. Finally, the conventional channel routing algorithm is applied for nets unrouted on over-the-cell. From the experimental results with MCNC benchmarks, the proposed cell model and algorithm produce smaller height of layouts as compared to those produced by conventional cell models and algorithms, and the effectiveness of the proposed method and cell model was shown.
Starting Page	195
Ending Page	202
File Size	992002
Page Count	8
File Format	PDF
ISBN	4930813670
DOI	10.1109/ASPDAC.1995.486223
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-08-29
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Routing Electronic mail Cities and towns Standards development Algorithm design and analysis Heuristic algorithms Linear programming Testing
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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