公开(公告)号：DE69518545D1

公开(公告)日：2000-09-28

申请号：DE69518545

申请日：1995-01-26

Applicant: IBM

Inventor： LUIJTEN PETER ,  WEBB JOHN

IPC: H04Q3/00 ,  H04L12/28 ,  H04L49/111 ,  H04Q11/04

Abstract: PCT No. PCT/EP95/00276 Sec. 371 Date Jul. 7, 1997 Sec. 102(e) Date Jul. 7, 1997 PCT Filed Jan. 26, 1995 PCT Pub. No. WO96/23391 PCT Pub. Date Aug. 1, 1996A switch for use in an ATM network is disclosed. The switch is designed to perform a function beyond that normally achievable with a virtual path switch functioning in accordance with the ATM standard. The switch according to the invention has data stored in a look-up table (431-433) which allows it to identify communication cells of particular individual virtual channels, indicated by the virtual path identifier (VCI), although these cells cannot be distinguished on the basis of their virtual path indicators (VPIs). This identification is attempted before the usual step of forwarding an incoming communication cell based solely on its virtual path indicator. A priority circuitry (44) ensures that entries associated with the combined VPI/VCI is given a priority over those associated only with the VPI. The switch can extract cells of individual virtual channels passing through it. It can also insert virtual channels into the ATM network.

公开(公告)号：DE60213430T2

公开(公告)日：2007-08-23

申请号：DE60213430

申请日：2002-05-03

Applicant: IBM

Inventor： BARKER JAMES ,  CLAUBERG ROLF ,  CALVIGNAC LOUIS ,  HERKERSDORF GUENTHER ,  VERPLANKEN JEAN ,  WEBB JOHN

IPC: H04J3/00 ,  H04J3/16 ,  H04J3/04 ,  H04J3/06 ,  H04J3/22 ,  H04L13/08 ,  H04Q11/04

Abstract: The present invention relates to a device for combining at least two data signals having an input data rate into a single data stream having an output data rate being higher than the input data rate for transmission on a shared medium or vice versa, particularly, to a single SDH/SONET framer capable of handling a large range of SDH/SONET frames from STM-i to STM-j with an aggregated total capacity corresponding to an STM-j frame where i and j are integers in the range from 1 to 64 or higher according to the STM-N definition of the SDH/SONET standards. More over, the present invention can also be extended to work with STS-1 as lowest range. STS-1 exists in SONET only not SDH and corresponds to a data rate of 51.5 Mb/s a third of the 156 Mb/s of STM-1. The device according to the present invention comprises at least two ports for receiving and/or sending said at least two data signals, a port scanning unit for extracting data from the data signals received by said ports and/or synthesizing data to be transmitted via the ports, respectively, whereby said port scanning unit is configured to extract data from ports providing data streams having at least two different input data rates and/or to synthesize data to be transmitted via the ports taking data streams having at least two different data rates.

公开(公告)号：DE60213430D1

公开(公告)日：2006-09-07

申请号：DE60213430

申请日：2002-05-03

Applicant: IBM

Inventor： BARKER JAMES ,  CLAUBERG ROLF ,  CALVIGNAC LOUIS ,  HERKERSDORF GUENTHER ,  VERPLANKEN JEAN ,  WEBB JOHN

IPC: H04J3/00 ,  H04J3/16 ,  H04J3/04 ,  H04J3/06 ,  H04J3/22 ,  H04L13/08 ,  H04Q11/04

Abstract: The present invention relates to a device for combining at least two data signals having an input data rate into a single data stream having an output data rate being higher than the input data rate for transmission on a shared medium or vice versa, particularly, to a single SDH/SONET framer capable of handling a large range of SDH/SONET frames from STM-i to STM-j with an aggregated total capacity corresponding to an STM-j frame where i and j are integers in the range from 1 to 64 or higher according to the STM-N definition of the SDH/SONET standards. More over, the present invention can also be extended to work with STS-1 as lowest range. STS-1 exists in SONET only not SDH and corresponds to a data rate of 51.5 Mb/s a third of the 156 Mb/s of STM-1. The device according to the present invention comprises at least two ports for receiving and/or sending said at least two data signals, a port scanning unit for extracting data from the data signals received by said ports and/or synthesizing data to be transmitted via the ports, respectively, whereby said port scanning unit is configured to extract data from ports providing data streams having at least two different input data rates and/or to synthesize data to be transmitted via the ports taking data streams having at least two different data rates.