Global Patent Index - EP 0878073 A4

EP 0878073 A4 2001-05-09 - 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 (EN)

Application

EP 96918094 A

Priority

  • GB 9511314 A
  • US 9608907 W

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 (main, further and additional classification)

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

IPC 8 full level (invention and additional information)

H04L 12/54 (2013.01); H04L 12/931 (2013.01); H04L 12/935 (2013.01); H04L 12/70 (2013.01)

CPC (invention and additional information)

H04L 49/506 (2013.01); H04L 12/5602 (2013.01); H04L 49/3081 (2013.01); H04L 49/503 (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)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

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

INPADOC legal status


2003-12-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20021231

2002-04-17 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020304

2001-05-09 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010328

2001-05-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE FR GB

2001-05-09 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7H 04J 3/14 A, 7H 04J 3/16 B, 7H 04J 3/22 B, 7H 04J 3/24 B, 7H 04Q 11/04 B, 7H 04L 12/56 B

1998-11-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19971222

1998-11-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB