EP 0878073 A4 20010509 - ATM NETWORK SWITCH WITH CONGESTION CONTROL

Title (en)

ATM NETWORK SWITCH WITH CONGESTION CONTROL

Title (de)

ATM NETZWERK MIT VERSTOPFUNGSKONTROLLE

Title (fr)

COMMUTATEUR DE RESEAU ATM A PREVENTION D'ENCOMBREMENT

Publication

EP 0878073 A4 20010509 (EN)

Application

EP 96918094 A 19960605

Priority

GB 9511314 A 19950605
US 9608907 W 19960605

Abstract (en)

[origin: GB2301984A] An ATM network switch has a buffer 24 for buffering the flow of ATM cells and a congestion control mechanism 23. The congestion control mechanism has: i) means for establishing a value Max, representing the maximum permissible number of ATM cells on the connection for the cell which may be stored in the buffer, and an offset value K, which determines the maximum occupancy of the buffer for the connection; ii) means for determining the total number of cells TSC currently stored in the buffer and the number of cells VcCnt stored for a given connection; iii) means for determining the remaining capacity BS of the buffer; iv) calculating means for calculating an adjusted value of Max in accordance with the formula: , and v) means for comparing the adjusted value with VcCnt and for discarding the cell if VcCnt is greater than the adjusted value. The congestion control may also be applied to a Explicit Forward Congestion Indication (EFCI) system.

IPC 1-7

H04J 3/14; H04J 3/16; H04J 3/22; H04J 3/24; H04Q 11/04; H04L 12/56

IPC 8 full level

H04L 12/54 (2013.01); H04L 12/56 (2006.01); H04L 12/931 (2013.01); H04L 12/935 (2013.01); H04L 49/111 (2022.01); H04L 12/70 (2013.01)

CPC (source: EP)

H04L 12/5602 (2013.01); H04L 49/3081 (2013.01); H04L 49/503 (2013.01); H04L 49/506 (2013.01); H04L 49/30 (2013.01); H04L 49/3009 (2013.01); H04L 2012/5635 (2013.01); H04L 2012/5636 (2013.01); H04L 2012/5648 (2013.01); H04L 2012/5682 (2013.01)

Citation (search report)

[XAY] US 4849968 A 19890718 - TURNER JONATHAN S [US]
[YA] EP 0648062 A2 19950412 - AT & T CORP [US]
See references of WO 9639763A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

GB 2301984 A 19961218; GB 2301984 B 19991208; GB 9611705 D0 19960807; CA 2223680 A1 19961212; EP 0878073 A1 19981118; EP 0878073 A4 20010509; GB 9511314 D0 19950802; WO 9639763 A1 19961212

DOCDB simple family (application)

GB 9611705 A 19960605; CA 2223680 A 19960605; EP 96918094 A 19960605; GB 9511314 A 19950605; US 9608907 W 19960605