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WO1999031924A1 - Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication - Google Patents

Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication Download PDF

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Publication number
WO1999031924A1
WO1999031924A1 PCT/DE1998/003645 DE9803645W WO9931924A1 WO 1999031924 A1 WO1999031924 A1 WO 1999031924A1 DE 9803645 W DE9803645 W DE 9803645W WO 9931924 A1 WO9931924 A1 WO 9931924A1
Authority
WO
WIPO (PCT)
Prior art keywords
connections
virtual
vpi
transmission capacity
vci
Prior art date
Application number
PCT/DE1998/003645
Other languages
German (de)
English (en)
Inventor
Dorothea Lampe
Branko Popovic-Berrsche
Roland Brenner
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
Priority to EP98964388A priority Critical patent/EP1040715A1/fr
Priority to CA002314269A priority patent/CA2314269A1/fr
Publication of WO1999031924A1 publication Critical patent/WO1999031924A1/fr

Links

Classifications

    • 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
    • H04L2012/5624—Path aspects, e.g. path bundling
    • 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
    • H04L2012/5629—Admission control
    • H04L2012/5631—Resource management and allocation
    • H04L2012/5632—Bandwidth allocation
    • 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
    • H04L2012/5678—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management
    • H04L2012/568—Load balancing, smoothing or shaping

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • connection types For connections via which information is transmitted using an asynchronous transfer mode (ATM), two connection types are usually defined. In this way, real-time connections are distinguished from non-real-time connections.
  • ATM asynchronous transfer mode
  • real time connections are further divided into connections via which information is transmitted at a constant bit rate (CBR).
  • CBR constant bit rate
  • VBR variable bit rate
  • the information is generally transmitted in ATM cells.
  • the individual ATM cells are multiplexed in a large cell memory, which is connected to a statistical multiplexing unit (Statistical Multiplexing Unit, SMU), in accordance with predetermined algorithms onto the connecting line to the subsequent nodes of the communication network.
  • SMU statistical multiplexing unit
  • Such algorithms have been proposed, for example, in German patent application P 196 496 49.7.
  • the sigma rule algorithm mentioned there is an acceptance algorithm which is used to ensure that the transmission of the real time cells of the VBR type on this connecting line is optimized.
  • the Non Real Time connections are divided into connections with a variable bit rate (VBR), ABR traffic connections available bit rate (ABR) and UBR traffic connections (Unspecified Bite Rate, UBR).
  • VBR variable bit rate
  • ABR ABR traffic connections available bit rate
  • UBR Unspecified Bite Rate
  • VBR type connections a predetermined transmission rate (sustainable cell rate, SCR) is maintained on average.
  • SCR sustainable cell rate
  • MCR minimum transmission rate
  • the non-real-time connections associated ATM cells cannot be optimized with the help of the Sigma Rule algorithm on the connecting line, since this algorithm only optimizes VBR-type ATM cells associated with real-time connections.
  • the invention is based on the object of demonstrating a way in which ATM cells which are associated with non-real-time connections can be optimized on the connecting lines which follow in the communication system.
  • the external resources of connections and the associated data path which are not occupied in time can be used by accumulated, waiting ATM cells of other connections until the capacity limit of the connecting line is reached.
  • the capacity limit of the connecting line is understood to mean the sum of the free transmission capacity of all virtual paths on this connecting line.
  • a communication system KS in which information is switched through after an asynchronous transfer mode (ATM) and fed to subsequent connection sections.
  • a processor P is arranged in the communication system KS, which controls a statistical multiplexing device SMU, which is formed by a cell memory and further processors.
  • SMU statistical multiplexing device
  • ATM cells of all connection types of the non-real-time connections are stored in the cell memory.
  • the ATM cells are read out in accordance with predetermined algorithms and transmitted via the connecting line V.
  • the statistical multiplex device SMU is also followed by a line connection device LIC, which is operatively connected to the connecting line V.
  • the ATM cells of the most varied of connections are fed to the subsequently switched devices via the connecting line V.
  • a statistical multiplex device SMU and a line connection device LIC with a connecting line V are shown. However, this is not intended to mean any restriction; a plurality of these addressed devices are always contained in a communication system.
  • each of the paths comprises a plurality of virtual connections VCI 1 . ..VCI m , where the variables VCI x - ⁇ VCI m mean a virtual channel number VCI and thus represent a variable characteristic of the virtual connection.
  • a virtual connection VCI 28 which is assigned to the virtual path VPI 12 , is to be assigned the transmission capacity which has become free.
  • the virtual connection VCI 28 should also be of the ABR type.
  • the sending device (source) of this connection is now informed that the information can be transmitted more quickly.
  • the acceleration of the transmission process can be increased until the capacity limit of the connecting line in which transmission capacity has become free is reached. This means that this type of ABR connection can also be cleared down all the more quickly, and the transmission capacity thus freed up can then be made available to further connections.
  • the free transmission capacity can also be assigned to traffic connections on the same virtual path.
  • the method according to the invention can also be used in the case of non-terminating non-real-time paths (leased lines) and switched paths (switching connections) of the real-time type. These two connection types are also covered by the higher-level logic described above.
  • the associated ATM cells are detected and treated in the same way as the ATM cells described above.

Landscapes

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

Abstract

Dans des liaisons permettant de transférer des informations selon un mode de transfert asynchrone (MTA), les cellules MTA contenant les informations doivent être acheminées de façon optimisée aux unités suivantes. Dans le cas de liaisons différées, la capacité de transmission disponible sur des parties de liaison est répartie sur des chemins virtuels. Selon l'invention, il est prévu d'affecter la capacité de transmission libre ou devenue libre dans un chemin, au-delà des limites du chemin, à des cellules MTA de liaisons virtuelles dudit chemin virtuel ou d'autres chemins virtuels.
PCT/DE1998/003645 1997-12-12 1998-12-11 Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication WO1999031924A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98964388A EP1040715A1 (fr) 1997-12-12 1998-12-11 Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication
CA002314269A CA2314269A1 (fr) 1997-12-12 1998-12-11 Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997155385 DE19755385A1 (de) 1997-12-12 1997-12-12 Optimierung der Auslastung externer Übertragungsresourcen auf Verbindungsabschnitten zwischen Kommunikationssystemen
DE19755385.0 1997-12-12

Publications (1)

Publication Number Publication Date
WO1999031924A1 true WO1999031924A1 (fr) 1999-06-24

Family

ID=7851758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/003645 WO1999031924A1 (fr) 1997-12-12 1998-12-11 Optimisation de l'utilisation de ressources de transmission externes sur des parties de liaisons entre des systemes de communication

Country Status (4)

Country Link
EP (1) EP1040715A1 (fr)
CA (1) CA2314269A1 (fr)
DE (1) DE19755385A1 (fr)
WO (1) WO1999031924A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123193A1 (de) 2001-05-12 2002-11-14 Alcatel Sa Verfahren und Vorrichtungen zur Datenübertragung mit zeitlich veränderlicher Datenrate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2834293B2 (ja) * 1990-08-17 1998-12-09 株式会社日立製作所 バーチャルパス容量の変更方法
US5768271A (en) * 1996-04-12 1998-06-16 Alcatel Data Networks Inc. Virtual private network

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HWANG R -H: "LLR ROUTING IN HOMOGENEOUS VP-BASED ATM NETWORKS", PROCEEDINGS OF INFOCOM '95 - CONFERENCE ON COMPUTER COMMUNICATIONS, FOURTEENTH ANNUAL JOINT CONFERENCE OF THE IEEE COMPUTER AND COMMUNICATIONS SOCIETIES, BOSTON APR. 2 - 6, 1995, vol. 3, no. CONF. 14, 2 April 1995 (1995-04-02), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 587 - 593, XP000580626 *
KATSUBE Y ET AL: "QOS CONTROL IN AN ATM NETWORK CONSIDERING VIRTUAL PATH CONCEPT", COMMUNICATIONS: CONNECTING THE FUTURE, SAN DIEGO, DEC. 2 - 5, 1990, vol. 2, 2 December 1990 (1990-12-02), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1104 - 1110, XP000221002 *
NAOKI WAKAMIYA ET AL: "PERFORMANCE EVALUATION OF BURST-BASED BANDWIDTH-RESERVATION METHOD IN ATM NETWORKS", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS, vol. 77, no. 11, 1 November 1994 (1994-11-01), pages 25 - 36, XP000491904 *
YAMANAKA N ET AL: "FLEXIBLE MULTI-QOS LOGICAL ATM NETWORK (FULL-NET)", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS, vol. 80, no. 6, 1 June 1997 (1997-06-01), pages 47 - 57, XP000695207 *

Also Published As

Publication number Publication date
EP1040715A1 (fr) 2000-10-04
DE19755385A1 (de) 1999-06-17
CA2314269A1 (fr) 1999-06-24

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