CA2058816A1 - Common memory switch for routing data signals - Google Patents

Common memory switch for routing data signals

Info

Publication number
CA2058816A1
CA2058816A1 CA2058816A CA2058816A CA2058816A1 CA 2058816 A1 CA2058816 A1 CA 2058816A1 CA 2058816 A CA2058816 A CA 2058816A CA 2058816 A CA2058816 A CA 2058816A CA 2058816 A1 CA2058816 A1 CA 2058816A1
Authority
CA
Canada
Prior art keywords
switch
cell
atm
channel
stm
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2058816A
Other languages
French (fr)
Other versions
CA2058816C (en
Inventor
Ernst August Munter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2058816A1 publication Critical patent/CA2058816A1/en
Application granted granted Critical
Publication of CA2058816C publication Critical patent/CA2058816C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • 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
    • 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
    • H04L49/108—ATM switching elements using shared central buffer
    • 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
    • H04L49/309—Header conversion, routing tables or routing tags
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/60—Software-defined switches
    • H04L49/606—Hybrid ATM switches, e.g. ATM&STM, ATM&Frame Relay or ATM&IP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0003—Switching fabrics, e.g. transport network, control network
    • H04J2203/0005—Switching elements
    • 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
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly

Abstract

In order to handle a synchronous transfer mode (ATM) cells and synchronous transfer mode (STM) words in a single switch, STM words incoming on a channel are accumulated until a desired data block is available and a switch header is then added thereto in order to form an STM
switch cell. The header includes routing information and a flag indicating the switch cell comprises STM words. In additional, a switch header is added to each ATM cell incoming on a channel in order to form an ATM switch cell.
The header added to ATM cells includes routing information and a flag indicating the cell comprises an ATM cell. The ATM and STM switch cells feed input channels of a common memory switch. An ATM switch cell from a given incoming channel is stored at a memory address and the memory address input to a queue which is assigned to the outgoing channel indicated by the routing information of the switch header of the cell. At the same time, an ATM switch cell intended for an outgoing channel corresponding to the given incoming channel is read out of the switch, stripped of its switch header and passed to the outgoing channel. An STM cell from a given incoming channel is stored at an address indicative of the given incoming channel and, at the same time, a stored STM switch cell from another incoming channel indicated by the routing information of the incoming cell, is read out of the switch.
CA002058816A 1991-01-11 1992-01-06 Common memory switch for routing data signals Expired - Fee Related CA2058816C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/638,872 US5144619A (en) 1991-01-11 1991-01-11 Common memory switch for routing data signals comprising ATM and STM cells
US07/638,872 1991-01-11

Publications (2)

Publication Number Publication Date
CA2058816A1 true CA2058816A1 (en) 1992-07-12
CA2058816C CA2058816C (en) 1998-05-05

Family

ID=24561803

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002058816A Expired - Fee Related CA2058816C (en) 1991-01-11 1992-01-06 Common memory switch for routing data signals

Country Status (3)

Country Link
US (1) US5144619A (en)
JP (1) JP2686872B2 (en)
CA (1) CA2058816C (en)

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Also Published As

Publication number Publication date
JPH06261058A (en) 1994-09-16
US5144619A (en) 1992-09-01
JP2686872B2 (en) 1997-12-08
CA2058816C (en) 1998-05-05

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