WO1999009784A3 - Cell selection for atm switch having redundant switch planes - Google Patents

Cell selection for atm switch having redundant switch planes Download PDF

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Publication number
WO1999009784A3
WO1999009784A3 PCT/SE1998/001471 SE9801471W WO9909784A3 WO 1999009784 A3 WO1999009784 A3 WO 1999009784A3 SE 9801471 W SE9801471 W SE 9801471W WO 9909784 A3 WO9909784 A3 WO 9909784A3
Authority
WO
WIPO (PCT)
Prior art keywords
switch
cell
planes
copy
copies
Prior art date
Application number
PCT/SE1998/001471
Other languages
French (fr)
Other versions
WO1999009784A2 (en
Inventor
Goeran Wicklund
Original Assignee
Ericsson Telefon Ab L M
Goeran Wicklund
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 Ericsson Telefon Ab L M, Goeran Wicklund filed Critical Ericsson Telefon Ab L M
Priority to AU90118/98A priority Critical patent/AU9011898A/en
Publication of WO1999009784A2 publication Critical patent/WO1999009784A2/en
Publication of WO1999009784A3 publication Critical patent/WO1999009784A3/en

Links

Classifications

    • 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
    • H04L49/153—ATM switching fabrics having parallel switch planes
    • 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
    • H04L49/1576—Crossbar or matrix
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/201—Multicast operation; Broadcast operation
    • H04L49/203—ATM switching fabrics with multicast or broadcast capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
    • H04L49/255—Control mechanisms for ATM switching fabrics
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

For redundancy, an asynchronous transfer mode (ATM) switch (20) has plural switch planes (30(1), 30(2)) which feed copies of cells to a cell selector (40). As a copy of a cell is received by the cell selector (40) from any one of the plural switch planes (30(1), 30(2)), the cell selector (40) determines whether the copy of the cells is to be applied to a physical egress link (42). The cell selector (40) uses a sequence number (SN) and a virtual channel identifier (VCI) borne in the copy of the cell in determining which copies should be applied to the physical egress link (42). In one embodiment, the switch (20') has at least three switch planes (30(1), 30(2), 30(3)). The cell selector applies a selected copy of the cell to the physical egress link (42) upon reception of a predetermined number of the copies.
PCT/SE1998/001471 1997-08-15 1998-08-14 Cell selection for atm switch having redundant switch planes WO1999009784A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU90118/98A AU9011898A (en) 1997-08-15 1998-08-14 Cell selection for atm switch having redundant switch planes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5579897P 1997-08-15 1997-08-15
US60/055,798 1997-08-15

Publications (2)

Publication Number Publication Date
WO1999009784A2 WO1999009784A2 (en) 1999-02-25
WO1999009784A3 true WO1999009784A3 (en) 1999-05-14

Family

ID=22000230

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001471 WO1999009784A2 (en) 1997-08-15 1998-08-14 Cell selection for atm switch having redundant switch planes

Country Status (2)

Country Link
AU (1) AU9011898A (en)
WO (1) WO1999009784A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6667954B1 (en) 2000-02-10 2003-12-23 Tellabs Operations, Inc. Methods and apparatus for selecting the better cell from redundant streams within a cell-oriented environment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236930A (en) * 1989-10-11 1991-04-17 Plessey Co Plc Asynchronous transfer mode switch
US5200950A (en) * 1990-04-27 1993-04-06 Siemens Aktiengesellschaft Method and circuit arrangement for reducing the loss of message packets that are transmitted via a packet switching equipment
EP0537382A1 (en) * 1991-10-15 1993-04-21 ALCATEL BELL Naamloze Vennootschap Packet transfer control arrangement and related method
US5485453A (en) * 1993-02-15 1996-01-16 Telefonaktiebolaget L M Ericsson Method for handling redundant switching planes in packet switches and a packet switch for carrying out the method
US5784357A (en) * 1994-09-09 1998-07-21 U.S. Philips Corporation Packet switching system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236930A (en) * 1989-10-11 1991-04-17 Plessey Co Plc Asynchronous transfer mode switch
EP0507022A1 (en) * 1989-10-11 1992-10-07 Gpt Limited Method and apparatus for identifying valid cells in a redundant path combining unit of an asynchronous transfer mode switch
US5200950A (en) * 1990-04-27 1993-04-06 Siemens Aktiengesellschaft Method and circuit arrangement for reducing the loss of message packets that are transmitted via a packet switching equipment
EP0537382A1 (en) * 1991-10-15 1993-04-21 ALCATEL BELL Naamloze Vennootschap Packet transfer control arrangement and related method
US5485453A (en) * 1993-02-15 1996-01-16 Telefonaktiebolaget L M Ericsson Method for handling redundant switching planes in packet switches and a packet switch for carrying out the method
US5784357A (en) * 1994-09-09 1998-07-21 U.S. Philips Corporation Packet switching system

Also Published As

Publication number Publication date
AU9011898A (en) 1999-03-08
WO1999009784A2 (en) 1999-02-25

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WO1999009784A3 (en) Cell selection for atm switch having redundant switch planes

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