Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2006-10-10
2006-10-10
To, Doris H. (Department: 2616)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
C370S230000, C370S429000
Reexamination Certificate
active
07120117
ABSTRACT:
A shared memory packet switching device includes: a shared memory providing a shared memory space; an input logic unit associated with at least one receive port, and being operative to determine whether the associated receive port is saturated by determining whether a number of packets received via the associated receive port and currently stored in the shared memory exceeds a drop threshold value; a packet routing control unit operative to determine a destination one of the transmit ports for each of the received data packets; and an output logic unit associated with at least one of the transmit ports, the output logic unit being communicatively coupled with the packet routing control unit, and being operative to determine whether the associated transmit port is congested by determining whether a number of packets currently stored in the shared memory that are to be transmitted via the associated transit port exceeds a congestion threshold value, and also being operative to generate an associated output full signal indicative of whether the associated transmit port is congested. The input logic unit is responsive at least in part to each of the output full signals, and further operative to cause a selected packet received via the associated receive port to be dropped if the associated receive port is currently saturated and the output full signals indicate that a destination transmit port associated with the selected packet is currently congested.
REFERENCES:
patent: 5278789 (1994-01-01), Inoue et al.
patent: 5390173 (1995-02-01), Spinney et al.
patent: 5414704 (1995-05-01), Spinney
patent: 5423015 (1995-06-01), Chung
patent: 5459717 (1995-10-01), Mullan et al.
patent: 5473607 (1995-12-01), Hausman et al.
patent: 5499295 (1996-03-01), Cooper
patent: 5524254 (1996-06-01), Morgan et al.
patent: 5541912 (1996-07-01), Choudhury et al.
patent: 5555398 (1996-09-01), Raman
patent: 5568477 (1996-10-01), Galand et al.
patent: 5579301 (1996-11-01), Ganson et al.
patent: 5644784 (1997-07-01), Peek
patent: 5652579 (1997-07-01), Yamada et al.
patent: 5696899 (1997-12-01), Kalwitz
patent: 5726987 (1998-03-01), Uriu et al.
patent: 5742613 (1998-04-01), MacDonald
patent: 5748631 (1998-05-01), Bergantino et al.
patent: 5781549 (1998-07-01), Dai
patent: 5787071 (1998-07-01), Basso et al.
patent: 5787084 (1998-07-01), Hoang et al.
patent: 5790539 (1998-08-01), Chao et al.
patent: 5802052 (1998-09-01), Venkataraman
patent: 5802287 (1998-09-01), Rostoker et al.
patent: 5825772 (1998-10-01), Dobbins et al.
patent: 5828653 (1998-10-01), Goss
patent: 5831980 (1998-11-01), Varma et al.
patent: 5842038 (1998-11-01), Williams et al.
patent: 5845081 (1998-12-01), Rangarajan et al.
patent: 5887187 (1999-03-01), Rostoker et al.
patent: 5892922 (1999-04-01), Lorenz
patent: 5898687 (1999-04-01), Harriman et al.
patent: 5901140 (1999-05-01), Van As et al.
patent: 5909686 (1999-06-01), Muller et al.
patent: 5918074 (1999-06-01), Wright et al.
patent: 5940596 (1999-08-01), Rajan et al.
patent: 5987507 (1999-11-01), Creedon et al.
patent: 6011795 (2000-01-01), Varghese et al.
patent: 6041053 (2000-03-01), Douceur et al.
patent: 6061351 (2000-05-01), Erimli et al.
patent: 6097698 (2000-08-01), Yang et al.
patent: 6119196 (2000-09-01), Muller et al.
patent: 6175902 (2001-01-01), Runaldue et al.
patent: 6185185 (2001-02-01), Bass et al.
patent: 6219728 (2001-04-01), Yin
patent: 6515963 (2003-02-01), Bechtolsheim et al.
patent: 6606300 (2003-08-01), Blanc et al.
patent: 2002/0089933 (2002-07-01), Giroux et al.
patent: 0312917 (1989-04-01), None
patent: 0465090 (1992-01-01), None
patent: 0752796 (1997-01-01), None
patent: 0849917 (1998-06-01), None
patent: 0853441 (1998-07-01), None
patent: 0854606 (1998-07-01), None
patent: 0859492 (1998-08-01), None
patent: 0862349 (1998-09-01), None
patent: 0907300 (1999-04-01), None
patent: 2 725 573 (1996-04-01), None
patent: 4-189023 (1992-07-01), None
patent: WO 98/09473 (1998-03-01), None
patent: WO 99/00938 (1999-01-01), None
patent: WO 99/00939 (1999-01-01), None
patent: WO 99/00944 (1999-01-01), None
patent: WO 99/00945 (1999-01-01), None
patent: WO 99/00948 (1999-01-01), None
patent: WO 99/00949 (1999-01-01), None
patent: WO 99/00950 (1999-01-01), None
patent: WO9900936 (2001-06-01), None
“A High-Speed CMOS Circuit for 1.2-Gb/s 16×16 ATM Switching,” Alain Chemarin et al. 8107 IEEE Journal of Solid-State Circuits 27(Jul. 1992), No. 7, New York, US, pp. 1116-1120.
“Local Area Network Switch Frame Lookup Technique for Increased Speed and Flexibility,” 700 IBM Technical Disclosure Bulletin 38(Jul. 1995), No. 7, Armonk, NY, US, pp. 221-222.
“Queue Management for Shared Buffer and Shared Multi-buffer ATM Switches,” Yu-Sheng Lin et al., Department of Electronics Engineering & Institute of Electronics, National Chiao Tung University, Hsinchu, Taiwan, R.O.C., Mar. 24, 1996, pp. 688-695.
“A 622-Mb/s 8×8 ATM Switch Chip Set with Shared Multibuffer Architecture,” Harufusa Kondoh et al., 8107 IEEE Journal of Solid-State Circuits 28(Jul. 1993), No. 7, New York, US, pp. 808-814.
“Catalyst 8500 CSR Architecture,” White Paper XP-002151999, Cisco Systems Inc. 1998, pp. 1-19.
“Computer Networks,” A.S. Tanenbaum, Prentice-Hall Int., USA, XP-002147300(1998), Sec. 5.2-Sec. 5.3, pp. 309-320.
Chao Jason
Dai William
Liu Yao-Ching
Broadcom Corporation
Squire Sanders & Dempsey LLP
To Doris H.
Tsegaye Saba
LandOfFree
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