WO1998037726A1 - Koppelanordnung für ein breitband-kommunikationssystem - Google Patents
Koppelanordnung für ein breitband-kommunikationssystem Download PDFInfo
- Publication number
- WO1998037726A1 WO1998037726A1 PCT/DE1998/000408 DE9800408W WO9837726A1 WO 1998037726 A1 WO1998037726 A1 WO 1998037726A1 DE 9800408 W DE9800408 W DE 9800408W WO 9837726 A1 WO9837726 A1 WO 9837726A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- oml
- electrical
- coupling arrangement
- coupling
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
- H04L49/104—Asynchronous transfer mode [ATM] switching fabrics
- H04L49/105—ATM switching elements
- H04L49/107—ATM switching elements using shared medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/15—Interconnection of switching modules
- H04L49/1515—Non-blocking multistage, e.g. Clos
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/15—Interconnection of switching modules
- H04L49/1553—Interconnection of ATM switching modules, e.g. ATM switching fabrics
- H04L49/1584—Full Mesh, e.g. knockout
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5672—Multiplexing, e.g. coding, scrambling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
Definitions
- the invention relates to a coupling arrangement for a broadband communication system used for the transmission of digital data signals, the coupling arrangement being designed in such a way that it is constructed from individual coupling elements such that these coupling elements each have a plurality of inputs and a smaller number of outputs than these and that the coupling elements form at least one multi-stage funnel through their connection to one another.
- the invention has the advantage that within the communication system the transmission of data and clock signals takes place only electrically within the respective coupling arrangement. In contrast, the external signal transmission to or from the respective switching arrangement takes place in multiplex mode via optical connecting lines. In this way, the number of physical connector interfaces for the transmission of data signals and clock signals can be greatly reduced on the modules. For example, with a funnel of structure 64/8 used in the coupling arrangement, with 64 input ports, 8 output ports and 10 lines per port with regard to the technology of the electrical components used, with a pure electrical version 720 (640 + 80) electrical connectors required for signal inputs and signal outputs. In contrast, this number is reduced to 72 optical connector points
- 2 shows the schematic structure of a shortened, multi-stage funnel
- 3 schematically shows the arrangement of coupled lines on an assembly circuit board
- FIG. 1 shows a multi-stage funnel structure as used in broadband communication systems.
- An example of such a broadband communication system is a switching system operating according to the asynchronous transfer mode (ATM).
- ATM asynchronous transfer mode
- the multi-stage funnel is constructed in three stages using coupling elements KE each with a structure of 16/8 with 16 input ports, 8 output ports and 10 lines per port.
- first stage there are 4 coupling elements (16/8).
- the 8 output ports of each two coupling elements of this first stage are routed to the 16 input ports of a further coupling element.
- the 16 output ports (2x8) of the two coupling elements of the second stage are connected to the 16 input ports of a coupling element forming a third stage and thus the output of the funnel.
- FIG. 2 shows an alternative funnel, which, however, is only made up of two stages. This funnel also initially has four coupling elements KE of the structure 16/8 specified above in a first stage.
- the output stage of the funnel is formed by two coupling elements of structure 16/4 or structure 16/8, only four of the 8 output ports of the respective coupling element being used in the latter. From the individual coupling elements of the first stage, four output ports are routed to the 16 input ports of one of the two coupling elements of the output stage. The remaining four output ports of each of the coupling elements KE of the first stage are connected to the 16 input ports of the remaining coupling element of the output stage.
- 64 input ports and 8 output ports can also be realized, which also results in a total of 640 input lines and 80 output lines in the case of the 10 lines specified per port.
- a coupling arrangement of structure 64/64 can be formed, ie a coupling arrangement with 640 input lines and 640 output lines.
- the only difference between the two funnels just explained is the number of coupling elements required per funnel.
- 7 coupling elements are required for the funnel according to FIG. 1
- the shortened funnel according to FIG. 2 manages with 6 coupling elements.
- a total of 56 coupling elements are required for a coupling arrangement of the structure 64/64 when using funnels according to FIG. 1.
- the number of coupling elements is reduced to 48, which leads to a considerable saving in components in the case of large coupling arrangements.
- Previous ATM switching arrangements were, for example, designed for throughput rates of up to 20 Gbit / s.
- the data rate per port within an ATM switching arrangement was, for example, approximately 207 Mbit / s, which is designated ATM1. This data rate is compared to the data rate on external input lines. and output lines increased by a factor of 4/3, since a certain "overhead" to be added to the signals (message cells) is required for signal transmission within an ATM switching network.
- a resulting data rate results in approximately 155 Mbit / s and is called STM1, for example.
- the coupling arrangement according to the present exemplary embodiment should be optimized with regard to the following criteria: high switching performance or data throughput, e.g. 160 Gbit / ⁇
- a coupling arrangement with 64 inputs on 64 outputs is realized (corresponds to a net throughput of 160 Gbit / s), a total of 56 coupling elements being required for this using a funnel structure according to FIG.
- this structure is under realization
- each funnel forms a coupling arrangement with 64 input ports on 8 output ports.
- 8 funnels are connected in parallel on the input side.
- the module section in the present exemplary embodiment in order to save as many interfaces as possible between the individual modules (and thus the effort for the connection technology), is selected such that at least one complete shortened funnel of structure 64/8 (6 coupling elements in one funnel) is used FIG 2) is located on an assembly. Since the number of necessary input lines and output lines with 720 single wires would far exceed all previously available electrical connector systems with one funnel per module, a concept with optical connection technology is used here and thus the number of connection points with unidirectional electrical / optical or optical / electrical Converters (OML, "Optical Multiplexer Link") reduced to realizable values of 72 optical inputs / outputs over the module limit.
- OML optical Multiplexer Link
- the signals appearing on one port are used - one port consists of 4 differential data lines and one associated differential clock line - multiplexed into a serial bit stream and converted electro-optically or converted back in the opposite direction with an optical / electrical converter OML-E.
- the respective optical signal has a data rate of 3.3 Gbit / s, which corresponds to 830 Mbit / s on the four differential data lines. This reduces the number of physical plug-in points from 720 electrical pins to 72 fiber optic transitions.
- a previously used assembly format has been expanded to twice the height in the present exemplary embodiment. With 8 such modules, a coupling arrangement 64/64 could be built using a total of 576 OML (OML-S and OML-E). The number 576 results from 8x (64 OML-E + 8 OML-S).
- the degree of utilization of the area on the double high modules is further increased by a special construction for the electrical / optical or optical / electrical converters OML-S or OML-E).
- the converter modules (OML-S and OML-E) are mounted upright on the long edge in an edge socket.
- the circuit board of the converter modules are provided with "pads" and plugged directly into a base.
- the assembly using a plug-in base has the advantage that the converter modules with the sensitive glass fibers are not used during a soldering process, for example during a soldering process Reflow processes, which are subject to thermal stress.
- the space required for each converter module is minimized by the vertical construction. It is therefore easier to exchange converter modules.
- RF signals can be transmitted with this strip-type connector without major distortions.
- the circuit board technology has also been improved with regard to the number of approx. 2000 830 Mbit / s connections.
- Appropriate placement of the components on the respective assembly circuit board ensures uniform utilization of the wiring areas of the individual layers and thus enables a simple unbundling structure.
- the required wiring area could be halved by using coupled lines for the differential data lines mentioned above.
- the individual coupled differential data lines and the associated coupled differential clock line are each routed on the printed circuit board in a separate lane as coupled triplate lines.
- the coupled lines routed in a lane are routed to the same length, the lane for the differential clock line running between the lanes of the four differential data lines.
- the principle of lane formation is shown schematically in FIG. 3.
- L is a multilayer printed circuit board.
- An alley guided within this circuit board is designated by G.
- the two coupled triplate lines VL and the electromagnetic field formed between them are outlined within this alley.
- the number of layers of a printed circuit board can be reduced to such an extent that the smallest possible plated-through holes can be used, which has a particularly positive effect with regard to the high-frequency aspects.
- signal distortions are reduced.
- the voltage supply in the form of DC-DC converters is accommodated on its own modules in the present exemplary embodiment.
- a voltage converter module is assigned to each coupling module.
- multiplex / demultiplex devices are additionally provided.
- these combine 32 ATM1 channels to form 2 ATM16 channels and are connected to the coupling modules via the optical lines (links) OML-E and OML-S.
- the multiplexer modules can also be removed if necessary (250 m as standard, can be extended up to several km), for example at any point in a switching office. This can save considerable cable costs for the connection between peripherals and multiplexers.
- the coupling modules are connected in parallel using optical splitters.
- FIG. 4 shows a coupling assembly BG of structure 64/16, on which two funnels labeled Tl and T2 are accommodated.
- Each of the two funnels is designed as a shortened funnel (FIG. 2) described above.
- the four coupling elements of the first stage of the respective a funnel with a structure of 16/8 (as previously mentioned with 16 input ports, 8 output ports and with 10 lines per port). In a corresponding manner, according to FIG 16/8 (of which only four are used).
- An optical / electrical converter OML-E is provided for each of the 64 input ports as module interfaces to other system components.
- the 64 electrical input ports (10 lines per port) are connected in parallel via these 64 optical / electrical converters.
- optical splitters are provided on the optical receiving side, each of which has four outputs with 16 optical connections each.
- a previously mentioned optical / electrical converter (OML-E) of the assembly shown in FIG. 4 is connected to each of the 16 optical connections of an output of the individual optical splitters.
- the three outputs of the four optical splitters not used in FIG. 4 are used in a manner not shown in order to connect three further coupling assemblies BG 64/16 in a corresponding manner via these outputs. This then creates a coupling arrangement with a structure of 64/64.
- the two coupling elements (16/4) in the output stage of the two shortened funnels according to FIG. 4 each have four output ports, to each of which an electrical / optical converter OML-S is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/297,314 US6763022B1 (en) | 1997-02-18 | 1998-02-12 | Switching network for a broadband communication system |
DE59811198T DE59811198D1 (de) | 1997-02-18 | 1998-02-12 | Koppelanordnung für ein breitband-kommunikationssystem |
CA002281774A CA2281774C (en) | 1997-02-18 | 1998-02-12 | Switching network for a broadband communication system |
EP98910625A EP0962118B1 (de) | 1997-02-18 | 1998-02-12 | Koppelanordnung für ein breitband-kommunikationssystem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19706280A DE19706280C2 (de) | 1997-02-18 | 1997-02-18 | Koppelanordnung für ein Breitband-Kommunikationssystem |
DE19706280.6 | 1997-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998037726A1 true WO1998037726A1 (de) | 1998-08-27 |
Family
ID=7820658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000408 WO1998037726A1 (de) | 1997-02-18 | 1998-02-12 | Koppelanordnung für ein breitband-kommunikationssystem |
Country Status (6)
Country | Link |
---|---|
US (1) | US6763022B1 (de) |
EP (1) | EP0962118B1 (de) |
CA (1) | CA2281774C (de) |
DE (2) | DE19706280C2 (de) |
ES (1) | ES2219878T3 (de) |
WO (1) | WO1998037726A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003039165A1 (de) * | 2001-10-29 | 2003-05-08 | Siemens Aktiengesellschaft | Paketorientiertes koppelfeld für kommunikationssysteme |
US8125259B2 (en) * | 2008-01-03 | 2012-02-28 | Agere Systems Inc. | Duty cycle distortion (DCD) jitter modeling, calibration and generation methods |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0086434A1 (de) * | 1982-02-12 | 1983-08-24 | Siemens Aktiengesellschaft | Koppelanordnung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3913300A1 (de) * | 1989-04-22 | 1990-10-25 | Standard Elektrik Lorenz Ag | Optisches nachrichtenuebertragungssystem fuer den teilnehmeranschlussbereich |
WO1992004741A1 (en) * | 1990-09-10 | 1992-03-19 | Tdk Corporation | Band-pass filter |
EP0512141A1 (de) * | 1991-05-07 | 1992-11-11 | Siemens Aktiengesellschaft | Verfahren zur Vermittlung von ATM-Nachrichtenzellenströmen hoher Bitrate über eine Vermittlungseinrichtung niedrigerer Bitrate |
FR2707775B1 (fr) * | 1993-07-12 | 1996-04-12 | Duret Chrsitian | Procédé et dispositif d'analyse d'informations contenues dans des structures de données. |
EP0705006B1 (de) * | 1994-09-28 | 1999-09-01 | Siemens Aktiengesellschaft | ATM-Übermittlungssystem zur statistischen Multiplexbildung von Zellen |
GB2300085A (en) * | 1995-04-18 | 1996-10-23 | Northern Telecom Ltd | A high speed switch |
US5846094A (en) * | 1996-02-29 | 1998-12-08 | Motorola, Inc. | Electrical coupling method and apparatus for printed circuit boards including a method of assembly |
DE19710504C2 (de) * | 1997-03-13 | 2001-06-13 | Siemens Ag | Optisch-elektrisches Modul |
US6097883A (en) * | 1997-07-08 | 2000-08-01 | International Business Machines Corporation | Dual state memory card having combined and single circuit operation |
-
1997
- 1997-02-18 DE DE19706280A patent/DE19706280C2/de not_active Expired - Fee Related
-
1998
- 1998-02-12 WO PCT/DE1998/000408 patent/WO1998037726A1/de active IP Right Grant
- 1998-02-12 EP EP98910625A patent/EP0962118B1/de not_active Expired - Lifetime
- 1998-02-12 CA CA002281774A patent/CA2281774C/en not_active Expired - Fee Related
- 1998-02-12 US US09/297,314 patent/US6763022B1/en not_active Expired - Fee Related
- 1998-02-12 ES ES98910625T patent/ES2219878T3/es not_active Expired - Lifetime
- 1998-02-12 DE DE59811198T patent/DE59811198D1/de not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0086434A1 (de) * | 1982-02-12 | 1983-08-24 | Siemens Aktiengesellschaft | Koppelanordnung |
Non-Patent Citations (4)
Title |
---|
FISCHER W ET AL: "A SCALABLE ATM SWITCHING SYSTEM ARCHITECTURE", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol. 9, no. 8, 1 October 1991 (1991-10-01), pages 1299 - 1307, XP000267581 * |
SHIGEKI HINO ET AL: "ASYNCHRONOUS TRANSFER MODE SWITCHING LSI CHIPS WITH 10-GB/S SERIAL I/O PORTS", IEEE JOURNAL OF SOLID-STATE CIRCUITS, vol. 30, no. 4, 1 April 1995 (1995-04-01), pages 348 - 352, XP000506437 * |
YOSHIMITSU ARAI ET AL: "MULTIGIGABIT MULTICHANNEL OPTICAL INTERCONNECTION MODULES FOR ASYNCHRONOUS TRANSFER MODE SWITCHING SYSTEMS", PROCEEDINGS OF THE ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE, ORLANDO, JUNE 1 - 4, 1993, no. CONF. 43, 1 June 1993 (1993-06-01), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 825 - 830, XP000380085 * |
YUSUKE OTA ET AL: "MULTICHANNEL PARALLEL DATA LINK FOR OPTICAL COMMUNICATION", IEEE LCS. THE MAGAZINE OF LIGHTWAVE COMMUNICATION SYSTEMS, vol. 2, no. 2, 1 May 1991 (1991-05-01), pages 24 - 32, XP000208323 * |
Also Published As
Publication number | Publication date |
---|---|
DE19706280C2 (de) | 1999-04-01 |
DE59811198D1 (de) | 2004-05-19 |
EP0962118B1 (de) | 2004-04-14 |
ES2219878T3 (es) | 2004-12-01 |
CA2281774C (en) | 2006-08-08 |
EP0962118A1 (de) | 1999-12-08 |
DE19706280A1 (de) | 1998-09-03 |
US6763022B1 (en) | 2004-07-13 |
CA2281774A1 (en) | 1998-08-27 |
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