Data encoding for fast CAM and TCAM access times

Details Data encoding for fast CAM and TCAM access times Data encoding for fast CAM and TCAM access times

2007-07-10

2007-07-10

Decady, Albert (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S805000, C714S819000, C711S108000, C365S049130

Reexamination Certificate

active

10616958

ABSTRACT:
A method and apparatus for operating a content addressable memory (CAM) and a ternary CAM (TCAM) are described including an encoding circuit for encoding an incoming CAM or TCAM word to produce an encoded CAM or TCAM word such that a one-bit mismatch between a comparand and the incoming CAM or TCAM word results in at least a M-bit mismatch between said encoded CAM or TCAM word and a similarly encoded comparand, a circuit for precharging a match line to a predetermined state before a comparison between the encoded CAM or TCAM word and said similarly encoded comparand and a memory storage location for storing the encoded CAM or TCAM word.

REFERENCES:
patent: 6842359 (2005-01-01), Hata et al.
patent: 6944710 (2005-09-01), Regev et al.
patent: 6975526 (2005-12-01), Regev et al.
patent: 7002823 (2006-02-01), Ichiriu
patent: 7017089 (2006-03-01), Huse

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