Reducing content addressable memory (CAM) power consumption...

Details Reducing content addressable memory (CAM) power consumption... Reducing content addressable memory (CAM) power consumption...

2011-07-05

2011-07-05

Lane, Jack A (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S165000, C709S223000, C709S225000

Reexamination Certificate

active

07975097

ABSTRACT:
A method may include counting the number of times each of a plurality of entries in a content addressable memory (CAM) matches one or more searches; grouping entries in the CAM into a first subset and a second subset based on the number of times each of the plurality of entries in the CAM matches one or more searches; and searching the first subset for a matching entry and, if no matching entry is found, searching the second subset for the matching entry.

REFERENCES:
patent: 7257678 (2007-08-01), Golden et al.
patent: 2006/0080498 (2006-04-01), Shoham et al.
patent: 2007/0022246 (2007-01-01), Regev et al.
Co-pending U.S. Appl. No. 11/850,074, filed Sep. 5, 2007; Harsha Narayan et al., entitled “Reducing Content Addressable Memory (CAM) Power Consumption Counters”.
Taskin Kocak, et al. “A power-efficient TCAM architecture for network forwarding tables”Journal of Systems Architecture, vol. 52, Feb. 2, 2006, pp. 307-314.
Kai Zheng, et al., “An Ultra High Throughput and Power Efficient TCAM-Based IP Lookup Engine1”, IEEE Infocom, Jul. 2004, 11 pages.
Francis Zane, et al. “CoolCAMs: Power-Efficient TCAMs for Forwarding Engines”, Bell Laboratories, Lucent Technologies, {francis,girija,basu}@research.bell-labs.com, Mar. 30-Apr. 3, 2003, 11 pages.
Wenjia Fang, et al. “Inter-AS Traffic Patterns and Their Implications” Princeton University {wfang\llp}@cs.princeton.edu, Mar. 16, 1999, 20 pages.
Cypress Semiconductor Corporation, Document #: 38-02110 Rev. *B, “Ayama™ 10000A Network Search Engine”, Feb. 1, 2006, pp. 1-145.

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