WO2002074040A2 - Ameliorations relatives a des systemes de communication - Google Patents

Ameliorations relatives a des systemes de communication Download PDF

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Publication number
WO2002074040A2
WO2002074040A2 PCT/EP2002/002895 EP0202895W WO02074040A2 WO 2002074040 A2 WO2002074040 A2 WO 2002074040A2 EP 0202895 W EP0202895 W EP 0202895W WO 02074040 A2 WO02074040 A2 WO 02074040A2
Authority
WO
WIPO (PCT)
Prior art keywords
router
data
lookup table
package
fed
Prior art date
Application number
PCT/EP2002/002895
Other languages
English (en)
Other versions
WO2002074040A3 (fr
Inventor
Paul Roderick Webb
Original Assignee
Roke Manor Research Limited
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
Priority claimed from GB0106747A external-priority patent/GB0106747D0/en
Application filed by Roke Manor Research Limited filed Critical Roke Manor Research Limited
Priority to AU2002256678A priority Critical patent/AU2002256678A1/en
Publication of WO2002074040A2 publication Critical patent/WO2002074040A2/fr
Publication of WO2002074040A3 publication Critical patent/WO2002074040A3/fr

Links

Classifications

    • 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
    • H04Q11/0005—Switch and router aspects
    • 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
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0039—Electrical control
    • 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
    • H04Q11/0062—Network aspects
    • H04Q2011/0077—Labelling aspects, e.g. multiprotocol label switching [MPLS], G-MPLS, MPAS

Definitions

  • This invention relates to communication systems and more especially it relates to such systems, which use optical TDM (Time Division Multiplex) switch cores.
  • TDM switch cores are now well known and such cores and systems/apparatus for use therewith are described in our co-pending Patent Application Numbers 2353157 A and 2362280A to which attention is hereby directed. Accordingly, neither detailed switch core description, nor detailed optical back plane description is believed to be necessary herein.
  • data packages are fed between subscribers via two stage routers coupled though an optical back plane.
  • One stage of the two stage router is used to select in dependence upon frequency band or colour, data for onward transmission, which is returned to the backplane, and the other stage is used to select in dependence upon a label carried by each data package, data fed through the router to other routes.
  • Labeling systems per se are in common use and for the internet for example, 32 bit packages are labeled IPN4, and 128 bit packages are labeled IPV6.
  • a communication system router comprises a number of optical backplanes which are arranged to feed a plurality of ingress lines, one for each ingress port, each of which lines utilises a plurality of TDM data slots, data packages being fed from the router via router egress ports, each data package being labeled in accordance with the line in which it traveled to the router and the TDM slot which it occupied, whereby the labels define for each package an address, each router comprising a lookup table which cross-correlates these addresses with egress ports, whereby each data package is routed to an appropriate egress port, as indicated by the lookup table, in dependence upon its label.
  • the labeling operation of each data package may be effected within the router.
  • the lookup table may comprise a (Read Only Memory) ROM.
  • the routers may each include a buffer store for the temporary storage of data packages routed to the same egress port.
  • the processing which involves the lookup table may be electronic, optical data being fed to and from the routers and converted as necessary therein.
  • - Figure 1 is a block circuit diagram of a known router system
  • - Figure 2 is a block circuit diagram of a TDM data router including a lookup table.
  • a known data router system comprises an MPLS (Multi-Protocol Label Switch) router 1, and an OXC (Optical X-Connector) 2.
  • the OXC 2 is fed with data from an optical backplane 3, data being routed in accordance with colour/frequency band, either via a line 4, to the MPLS router 1, or via a straight through path 5, for onward transmission through the optical backplane 3.
  • the MPLS router 1 sorts data packages fed thereto in accordance with labels, which they are arranged to carry. This two stage router operation wherein data is first sorted by colour and then by label tends to be inefficient and so a single stage processor as shown in Figure 2, is proposed.
  • TDM data is routed between a plurality of disparate routers, only one of which designated 6, is shown in Figure 2.
  • Data packages are fed to each of the ingress ports 7, in a predetermined one of 128 TDM slots and are labeled with an address determined in accordance with that line along which they were received, and the TDM slot which they occupy on that line.
  • a buffer store 12 is provided for temporary storage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de communication comprenant un fond de panier optique conçu pour alimenter une pluralité de routeurs de données disparates, chaque routeur possédant des ports d'entrée reliés à une pluralité de lignes, soit une pour chaque port d'entrée. Chacune de ces lignes utilise une pluralité d'intervalles de données MRT, des paquets de données étant acheminés à partir des routeurs par l'intermédiaire de ports de sortie dont certains réacheminent les données vers le fond de panier et d'autres réorientent ces données, chaque paquet de données étant étiqueté selon la ligne dans laquelle il s'est déplacé en direction du routeur et selon l'intervalle MRT qu'il a occupé. Les étiquettes définissent une adresse pour chaque paquet, chaque routeur comprenant une table de recherche permettant d'établir une corrélation croisée entre ces adresses et les ports de sortie. Chaque paquet de données est acheminé vers un port de sortie approprié indiqué par la table de recherche selon son étiquette.
PCT/EP2002/002895 2001-03-19 2002-03-14 Ameliorations relatives a des systemes de communication WO2002074040A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002256678A AU2002256678A1 (en) 2001-03-19 2002-03-14 Improvements in or relating to communication systems

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0106747.9 2001-03-19
GB0106747A GB0106747D0 (en) 2001-03-19 2001-03-19 Improvements in packet switching
GB0201099A GB2374245A (en) 2001-03-19 2002-01-18 Routing data packets through optical backplane routers
GB0201099.9 2002-01-18

Publications (2)

Publication Number Publication Date
WO2002074040A2 true WO2002074040A2 (fr) 2002-09-26
WO2002074040A3 WO2002074040A3 (fr) 2003-11-06

Family

ID=26245848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/002895 WO2002074040A2 (fr) 2001-03-19 2002-03-14 Ameliorations relatives a des systemes de communication

Country Status (2)

Country Link
AU (1) AU2002256678A1 (fr)
WO (1) WO2002074040A2 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002071791A2 (fr) * 2001-03-07 2002-09-12 Cedric Don-Carolis Systeme de communication photonique a granularite de largeur de bande a 'sous-frequence de ligne', transparence de protocole et connectivite deterministe maillee

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002071791A2 (fr) * 2001-03-07 2002-09-12 Cedric Don-Carolis Systeme de communication photonique a granularite de largeur de bande a 'sous-frequence de ligne', transparence de protocole et connectivite deterministe maillee

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MATSUMOTO T ET AL: "STUDIES ON OPTICAL DIGITAL CROSS-CONNECT SYSTEMS FOR VERY-HIGH-SPEED OPTICAL COMMUNICATIONS NETWORKS" IEICE TRANSACTIONS ON COMMUNICATIONS, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. E83-B, no. 1, January 2000 (2000-01), pages 30-37, XP000940278 ISSN: 0916-8516 *
SZYMANSKI T: "A PHOTONIC BACKPLANE ARCHITECTURE FOR BROADBAND SWITCHING" PROCEEDINGS OF THE SPIE, SPIE, BELLINGHAM, VA, US, vol. 2692, January 1996 (1996-01), pages 86-99, XP000853506 *
XU Y ET AL: "GENERALIZED MPLS-BASED DISTRIBUTED CONTROL ARCHTECTURE FOR AUTOMATICALLY SWITCHED TRANSPORT NETWORKS" BELL LABS TECHNOLOGY, BELL LABORATORIES, MURREY HILL, NJ, US, vol. 6, no. 1, January 2001 (2001-01), pages 33-49, XP001099877 ISSN: 1089-7089 *

Also Published As

Publication number Publication date
AU2002256678A1 (en) 2002-10-03
WO2002074040A3 (fr) 2003-11-06

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