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A Fast Head-Tail Expression Generator for TCAM -- Application to Packet Classification

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2 Author(s)
Syafalni, I. ; Dept. of Comput. Sci. & Electron., Kyushu Inst. of Technol., Iizuka, Japan ; Sasao, T.

This paper presents a method to generate head-tail expressions for Ternary Content Addressable Memories (TCAMs). First, we derive head-tail expressions for interval functions. We introduce a fast prefix sum-of-product (PreSOP) generator (FP) which generates products using the bit patterns of the endpoints. Next, we propose a direct head-tail expression generator (DHT). Experimental results show that DHT generates much smaller TCAM than FP. The proposed algorithm is useful for simplified TCAM generator for packet classification.

Published in:

VLSI (ISVLSI), 2012 IEEE Computer Society Annual Symposium on

Date of Conference:

19-21 Aug. 2012

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