Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2011-05-10
2011-05-10
Rojas, Midys (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S108000, C711S221000, C707SE17002, C707SE17034, C707SE17035, C707SE17037, C707SE17038
Reexamination Certificate
active
07941605
ABSTRACT:
Methods and apparatus are disclosed for generating a result based on a lookup result from a lookup operation using an associative memory and processing based on a discriminator portion of a lookup word. A first lookup operation is performed to generate a lookup result. In one implementation, a second lookup operation is performed based on a discriminator or the lookup result depending on the result of an evaluation, such as whether there was a hit or the lookup result matches a predetermined value. In one implementation, a second lookup operation is performed based on the discriminator, and either the result of the first or second lookup operation is used for subsequent processing. One implementation performs a lookup operation based on a lookup word to generate a lookup result, which is used to retrieve a base address and a bitmap from a memory. A discriminator is identified, and the result is generated based on the discriminator, the bitmap, and the base address, such as by adding to the base address the number of set bits in a range within the bitmap.
REFERENCES:
patent: 3648254 (1972-03-01), Beausoleil
patent: 4296475 (1981-10-01), Nederlof et al.
patent: 4791606 (1988-12-01), Threewitt et al.
patent: 4996666 (1991-02-01), Duluk, Jr.
patent: 5319763 (1994-06-01), Ho et al.
patent: 5339076 (1994-08-01), Jiang
patent: 5383146 (1995-01-01), Threewitt
patent: 5404482 (1995-04-01), Stamm et al.
patent: 5428565 (1995-06-01), Shaw
patent: 5440715 (1995-08-01), Wyland
patent: 5450351 (1995-09-01), Heddes
patent: 5515370 (1996-05-01), Rau
patent: 5564052 (1996-10-01), Nguyen et al.
patent: 5684954 (1997-11-01), Kaiserswerth et al.
patent: 5740171 (1998-04-01), Mazzola et al.
patent: 5796758 (1998-08-01), Levitan
patent: 5802567 (1998-09-01), Liu et al.
patent: 5813040 (1998-09-01), Rathke
patent: 5835963 (1998-11-01), Yoshioka et al.
patent: 5841874 (1998-11-01), Kempke et al.
patent: 5852569 (1998-12-01), Srinivasan et al.
patent: 5898689 (1999-04-01), Kumar et al.
patent: 5920886 (1999-07-01), Feldmeier
patent: 5920900 (1999-07-01), Poole et al.
patent: 5956336 (1999-09-01), Loschke et al.
patent: 5978885 (1999-11-01), Clark, II
patent: 6000008 (1999-12-01), Simcoe
patent: 6026467 (2000-02-01), Petty
patent: 6034965 (2000-03-01), Pollack et al.
patent: 6041389 (2000-03-01), Rao
patent: 6047369 (2000-04-01), Colwell et al.
patent: 6069573 (2000-05-01), Clark, II et al.
patent: 6081440 (2000-06-01), Washburn et al.
patent: 6097724 (2000-08-01), Kartalopoulos
patent: 6134135 (2000-10-01), Andersson
patent: 6137707 (2000-10-01), Srinivasan et al.
patent: 6148364 (2000-11-01), Srinivasan et al.
patent: 6154384 (2000-11-01), Nataraj et al.
patent: 6175513 (2001-01-01), Khanna
patent: 6181698 (2001-01-01), Hariguchi
patent: 6199140 (2001-03-01), Srinivasan et al.
patent: 6219748 (2001-04-01), Srinivasan et al.
patent: 6233652 (2001-05-01), Mathews et al.
patent: 6236658 (2001-05-01), Essbaum et al.
patent: 6237061 (2001-05-01), Srinivasan et al.
patent: 6240003 (2001-05-01), McElroy
patent: 6240485 (2001-05-01), Srinivasan et al.
patent: 6246601 (2001-06-01), Pereira
patent: 6295576 (2001-09-01), Ogura et al.
patent: 6307855 (2001-10-01), Hariguchi
patent: 6308219 (2001-10-01), Hughes
patent: 6374326 (2002-04-01), Kansal et al.
patent: 6377577 (2002-04-01), Bechtolsheim et al.
patent: 6389506 (2002-05-01), Ross et al.
patent: 6430190 (2002-08-01), Essbaum et al.
patent: 6434662 (2002-08-01), Greene et al.
patent: 6493812 (2002-12-01), Lyon
patent: 6526474 (2003-02-01), Ross
patent: 6535951 (2003-03-01), Ross
patent: 6715029 (2004-03-01), Trainin et al.
patent: 6763426 (2004-07-01), James et al.
patent: 6954823 (2005-10-01), James et al.
patent: 2003/0018879 (2003-01-01), Sahraoui et al.
Jon P. Wade and Charles G. Sodini, “A Ternary Content Addressable Search Engine,” IEEE Journal of Solid-State Circuits, vol. 24, No. 4, Aug. 1989, pp. 1003-1013.
Teuvo Kohonen, Content-Addressable Memories, 1987, pp. 128-129 and 142-144, Springer-Verlang, New York.
Brian Dipert, ed., “Special-purpose SRAMs Smooth the Ride,” EDN, Jun. 24, 1999, pp. 93-104.
“What is a CAM (Content-Addressable Memory)?,” Application Brief AB-N6, Rev. 2a, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 4 pages.
“Reading Out the Valid LANCAM Memory Entries,” Application Brief AB-N4, Rev. 1a, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 4 pages.
“Extending the LANCAM Comparand,” Application Brief AB-N3, Rev. 1.0a Draft, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 4 pages.
“Advantages of CAM in ASIC-Based Network Address Processing,” Application Brief , AB-N11, Rev. 1.2a Draft, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 4 pages.
“Virtual Memory Applications of the MU9C1480A LANCAM,” Application Note AN-N3, Rev. 1a, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 12 pages.
“Using the MU9C1965A LANCAM MP for Data Wider than 128 Bits,” Application Note AN-N19, Rev. 1a, Music Semiconductors, Milpitas, CA, Sep. 30, 1998, 16 pages.
“Fast IPv4 and IPv4 CIDR Address Translation and Filtering Using the MUAC Routing CoProcessor (RCP),” Application Note AN-N25, Rev. 0a, Music Semiconductors, Milpitas, CA, Oct. 1, 1998, 16 pages.
“Using MUSIC Devices and RCPs for IP Flow Recognition,” Application Note AN-N27, Rev. 0, Music Semiconductors, Milpitas, CA, Oct. 21, 1998, 20 pages.
“Wide Ternary Searches Using Music CAMs and RCPs,” Application Note AN-N31, Rev. 0, Music Semiconductors, Milpitas, CA, Apr. 13, 1999, 8 pages.
Donald R. Morrison, “PATRICIA—Practical Algorithm to Retrieve Information Coded in Alphanumeric,” Journal of the ACM, vol. 15, No. 4, Oct. 1968, pp. 514-534.
Waldvogel et al., “Scalable High Speed IP Routing Lookups,” Proc. SIGCOMM '97, ACM, 1997, pp. 25-36.
Lampson et al., “IP Lookups Using Multiway and Multicolumn Search,” Proc. Infocom 98, Mar. 1998, 24 pages.
V. Srinivasan and George Varghese, “Faster IP Lookups using Controlled Prefix Expansion,” ACM SIGMETRICS Performance Evaluation Review, vol. 26 No. 1, Jun. 1998, p. 1-10.
Stefan Nilsson and Gunnar Karlsson, “Fast Address Look-up for Internet Routers,” Proceedings of IEEE Broadband Communications, Apr. 1998, 12 pages.
William N. Eatherton, Hardware-Based Internet Protocol Prefix Lookups, Master's thesis, Sever Institute, Washington University, St. Louis, MO, May 1999, 109 pages.
Lampson et al., “IP Lookups Using Multiway and Multicolumn Search,” IEEE Transactions on Networking, vol. 7, No. 3, Jun. 1999, pp. 324-334.
Lockwood et al., “Field Programmable Port Extender (FPX) for Distributed Routing and Queuing,” Proceedings of the ACM/SIGDA international symposium on Field programmable gate arrays, Feb. 2000, pp. 137-144.
Ruiz-Sanchez et al., “Survey and Taxonomy of IP Address Lookup Algorithms,” IEEE Network Magazine, vol. 15, No. 2, Mar./Apr. 2001, pp. 8-23.
Pankaj Gupta and Nick McKewon, “Algorithms for Packet Classification,” IEEE NetWork Magazine, vol. 15, No. 2, Mar./Apr. 2001, pp. 24-32.
Iyer et al., “ClassiPI: An Architecture for Fast and Flexible Packet Classification,” IEEE Network Magazine, vol. 15, No. 2, Mar./Apr. 2001, pp. 33-41.
Waldvogel et al., “Scalable High Speed Prefix Matching,” ACM Transactions on Computer Systems, vol. 19, No. 4, Nov. 2001, pp. 440-482.
Devavrat Shah and Pankaj Gupta, “Fast Incremental Updates on Ternary-CAMs for Routing Lookups and Packet Classification,” Proc. Hot Interconnects VIII, Aug. 2000, Stanford. IEEE Micro, vol. 21, No. 1, Jan./Feb. 2001, 9 pages.
Waldvogel et al., “Scalable Best Matching Prefix Lookups,” PODC 98, ACM 1998.
Radia Perlman, Interconnections: Bridges, Routers, Switches, and Internetworking Protocols, Second Edition, Addison-Wesley, 2000, pp. 347-365.
Pankaj Gupta and Nick McKeown, “Algorithms for Packet Classification,” IEEE Netw
Goren Gil
Oren Eyal
Trainin Oded
Cisco Technology, Inc
Rojas Midys
The Law Office of Kirk D. Williams
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