WO2001013672A1 - Dispositif et procede permettant le routage de cellules atm pour l'implementation de materiel informatique ou de logiciels - Google Patents

Dispositif et procede permettant le routage de cellules atm pour l'implementation de materiel informatique ou de logiciels Download PDF

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Publication number
WO2001013672A1
WO2001013672A1 PCT/DE2000/002380 DE0002380W WO0113672A1 WO 2001013672 A1 WO2001013672 A1 WO 2001013672A1 DE 0002380 W DE0002380 W DE 0002380W WO 0113672 A1 WO0113672 A1 WO 0113672A1
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WO
WIPO (PCT)
Prior art keywords
atm
data
module
line module
transmission
Prior art date
Application number
PCT/DE2000/002380
Other languages
German (de)
English (en)
Inventor
Thomas Ahrndt
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2001013672A1 publication Critical patent/WO2001013672A1/fr

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Classifications

    • 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
    • H04L49/3081—ATM peripheral units, e.g. policing, insertion or extraction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • 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
    • H04L2012/5619—Network Node Interface, e.g. tandem connections, transit switching
    • H04L2012/562—Routing

Definitions

  • the present invention relates to routing and data transmission of ATM data units in a line module for an ATM switching node and a method used in this line module for routing and transmission of ATM data units, as described in appended claims 1 and 12, respectively is described.
  • Line modules are used to provide the external interfaces of a switching center for the participants or their terminal devices.
  • Today's line modules also called line cards
  • EWSD digital electronic voting system
  • these line modules have a PCM interface (pulse code modulation) for the transmission of voice data ms voice network.
  • these line modules also have an interface (such as in the frame relay, Ethernet or ATM system) for packet-oriented data transmission in a data transmission network with high data transmission rates.
  • An ATM data unit which is transmitted via an ATM transmission network, consists of a cell header with a length of 5 bytes and the user data with a length of 48 bytes. Data is contained in the cell header, e.g. B. serve for routing within the ATM transmission network and for error protection.
  • data is transferred between the individual components within a line module via the UTOPIA interface (Universal Test & Operations Physical Interface for ATM) specified by the ATM forum. Further information on ATM data transmission and the UTOPIA interface can be found in the literature "ATM infrastructure for high-performance communication", published by Axel Springer Verlag.
  • the UTOPIA interface was specified as an interface that is used for the uniform and manufacturer-independent, cell-based information transport between the individual components on an assembly.
  • microcontrollers (so-called UTOPIA masters) are required, which read ATM cells within the cell transmission rate and forward them to the corresponding components of a module (so-called UTOPIA slaves).
  • UTOPIA masters read ATM cells within the cell transmission rate and forward them to the corresponding components of a module
  • UTOPIA slaves These microcontrollers with UTOPIA interface must have a correspondingly fast processing speed and are therefore very expensive.
  • the invention is based on the object of making the transmission of packet-oriented information within an assembly more economical.
  • the problem is solved on the basis of a line module and a method according to the features of the preamble of claims 1 and 12 by their characterizing features.
  • the inventive direct transmission of the ATM data units between the individual components of a line module means that the use of components with a UTOPIA interface can be dispensed with.
  • a flexible, high-performance microcontroller with a UTOPIA interface that reads the ATM data units is therefore no longer required. if processed and then forwarded to the next component on the assembly.
  • the data from a plurality of terminal devices are combined in further transmission devices and sent to the transmission device.
  • the transmission device in turn has the task of summarizing the data sent by the further transmission devices and sending them to the ATM interface device.
  • ATM cells The information required for the internal routing of the ATM data units (ATM cells), i. H. the addresses of the end devices are permanently stored in the ATM interface module.
  • the incoming ATM cells read out the cell header and store it temporarily, then the content of the cell header is compared with the stored information and sent to the corresponding terminal.
  • the microcontroller performs tasks that do not require high computing power.
  • the configuration of the line module such as B. the fixed the addresses (port IDs) of the end devices.
  • the microcontroller is also used for monitoring, test purposes and for the production of statistics.
  • the individual components of the line module ie Ubertra ⁇ constriction device, ATM Thomasstellenbaustem and Microcon ⁇ troller are connected to one another via a star structure, whereby the ATM Thomasstellenbaustem, which takes over the Routmg of the ATM cells, the nodes of this structure provides DAR.
  • Data transmission can take place via serial or parallel interfaces, regardless of the selected transmission structure.
  • Figures la and lb show the routing of the ATM cells on a line module, as is carried out in the prior art.
  • the microcontroller 11 has a memory-mapped access to the transmission device 12 (hereafter referred to as data pump), that the content of the data ⁇ pump 12 is mapped to a memory area of the microcontroller. 11
  • the microcontroller 11 accesses the corresponding memory area of the data pump 12 and forwards the read data via the UTOPIA interface to the ATM interface module 13. If ATM cells are transmitted in the opposite direction, the microcontroller 11 reads the ATM cells from the ATM interface module 13 via the UTOPIA interface and writes them to the corresponding memory area of the data pump 12.
  • the data pump 12 likewise has a UTOPIA interface.
  • the ATM cells are read out by the microcontroller 11 via this interface, possibly processed and via the
  • ATM interface module 13 sent to the transmission network.
  • the data is received in reverse order.
  • the signals that are sent by the terminals 22 are separated in a device 27 between voice signals and data to be transmitted. If the signals to be transmitted are voice signals, these are transmitted by the signals to be transmitted.
  • Line module 21 transmitted via the voice transmission network in the PCM system.
  • the data from a plurality of terminal devices 22 are combined by a further transmission device 26 (hereinafter referred to as sub-data pump).
  • the transmission device 25 (hereinafter referred to as the data pump) in turn combines the data from a number of sub-data pumps 26 and transmits them directly to the ATM interface module 24.
  • the ATM interface module 24 has the task of sending data via the ATM data transmission network and receive.
  • ATM interface construction stone 24 routed the ATM cells to the terminals 22.
  • the transmission of data received by the data transmission network takes place in the reverse order.
  • the cell header m For routing the ATM cell to the corresponding Endgeraten 22, the cell header m to a register in the ATM interfaces ⁇ building block 24 stored, and with the likewise registers off set addresses (port ID's) of the Endgerate 22 and compared to the corresponding Endgerat 22 sent via the data pumps 25 and sub-data pumps 26.
  • the registers should have a length of 32 bits, which corresponds exactly to the length (4 bytes) of the cell header. Because the registers are 32 bits long, access can be optional, i. H. to any number of bits m anywhere in the cell header, and thus also for future applications of the invention.
  • the ATM interface module 24 should have at least one register for temporarily storing the cell header of the cell to be transmitted.
  • each sub-data pump 26 the microcontroller 23 and possibly for each data pump 25, in which the address information required for routing is permanently stored.
  • FIG. 3 shows an ATM cell 31 as it is constructed for data transmission within a line module and possibly to the next module.
  • the ATM cell 31 has a total size of 52 bytes; the byte that is used for error detection during a transmission via the ATM network is used, is not required within a module.
  • Bits 2 to 6 of the first byte, designated by reference numeral 32 in FIG. 3, are used for proprietary routing, i. H. these bits designate the address (port ID) of the relevant terminal. Any other place in the cell header to designate the port ID would also be conceivable.
  • the cell header also contains information about the further routing of the data in the data transmission network 33 to 37 (so-called connection identification), information about the type of user data and the cell loss priority 38.

Abstract

La présente invention concerne la transmission de données à l'intérieur d'un module de transmission (21) ainsi qu'un procédé appliqué à ce module de transmission (21), servant à la transmission de données. Les données sont pour cela transmises directement entre le dispositif de transmission (25) et le module d'interface ATM (24). L'acheminement des données est réalisé par le module d'interface ATM (24).
PCT/DE2000/002380 1999-08-13 2000-07-20 Dispositif et procede permettant le routage de cellules atm pour l'implementation de materiel informatique ou de logiciels WO2001013672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938483A DE19938483B4 (de) 1999-08-13 1999-08-13 Vorrichtung und Verfahren für das Routing von ATM-Zellen zur Implementierung in Hardware oder Software
DE19938483.5 1999-08-13

Publications (1)

Publication Number Publication Date
WO2001013672A1 true WO2001013672A1 (fr) 2001-02-22

Family

ID=7918339

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/002380 WO2001013672A1 (fr) 1999-08-13 2000-07-20 Dispositif et procede permettant le routage de cellules atm pour l'implementation de materiel informatique ou de logiciels

Country Status (2)

Country Link
DE (1) DE19938483B4 (fr)
WO (1) WO2001013672A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624039A2 (fr) * 1993-05-03 1994-11-09 AT&T Corp. Système intégré de services de télévision
US5781320A (en) * 1996-08-23 1998-07-14 Lucent Technologies Inc. Fiber access architecture for use in telecommunications networks
EP0858240A2 (fr) * 1996-12-12 1998-08-12 Fujitsu Limited Dispositif de composition et multiplexage de cellules, et dispositif de démultiplexage
GB2324676A (en) * 1997-04-23 1998-10-28 Fujitsu Ltd Interfacing to SAR devices in ATM switching apparatus
WO1999001009A2 (fr) * 1997-06-27 1999-01-07 Nokia Networks Oy Traitement de messages de signalisation sur noeud atm
WO1999013679A2 (fr) * 1997-09-08 1999-03-18 Telefonaktiebolaget Lm Ericsson Procede et appareil comprenant un dispositif de synchronisation pour la mise en paquets d'au moins deux flux de donnees

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485456A (en) * 1994-10-21 1996-01-16 Motorola, Inc. Asynchronous transfer mode (ATM) system having an ATM device coupled to multiple physical layer devices
NO970467L (no) * 1997-02-03 1998-08-04 Ericsson Telefon Ab L M FremgangsmÕte for Õ regenerere et punkt-til-multipunkt grensesnitt pÕ et punkt-til-punkt grensesnitt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624039A2 (fr) * 1993-05-03 1994-11-09 AT&T Corp. Système intégré de services de télévision
US5781320A (en) * 1996-08-23 1998-07-14 Lucent Technologies Inc. Fiber access architecture for use in telecommunications networks
EP0858240A2 (fr) * 1996-12-12 1998-08-12 Fujitsu Limited Dispositif de composition et multiplexage de cellules, et dispositif de démultiplexage
GB2324676A (en) * 1997-04-23 1998-10-28 Fujitsu Ltd Interfacing to SAR devices in ATM switching apparatus
WO1999001009A2 (fr) * 1997-06-27 1999-01-07 Nokia Networks Oy Traitement de messages de signalisation sur noeud atm
WO1999013679A2 (fr) * 1997-09-08 1999-03-18 Telefonaktiebolaget Lm Ericsson Procede et appareil comprenant un dispositif de synchronisation pour la mise en paquets d'au moins deux flux de donnees

Also Published As

Publication number Publication date
DE19938483B4 (de) 2005-10-13
DE19938483A1 (de) 2001-03-01

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