CA2099972A1 - Apparatus and Method for Selective Tributary Switching in a Bidirectional Ring Transmission System - Google Patents

Apparatus and Method for Selective Tributary Switching in a Bidirectional Ring Transmission System

Info

Publication number
CA2099972A1
CA2099972A1 CA2099972A CA2099972A CA2099972A1 CA 2099972 A1 CA2099972 A1 CA 2099972A1 CA 2099972 A CA2099972 A CA 2099972A CA 2099972 A CA2099972 A CA 2099972A CA 2099972 A1 CA2099972 A1 CA 2099972A1
Authority
CA
Canada
Prior art keywords
switched
switching
line
transmission system
ring
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
CA2099972A
Other languages
French (fr)
Other versions
CA2099972C (en
Inventor
Wilhelm Kremer
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2099972A1 publication Critical patent/CA2099972A1/en
Application granted granted Critical
Publication of CA2099972C publication Critical patent/CA2099972C/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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
    • H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
    • 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
    • H04J2203/0028—Local loop
    • H04J2203/0039—Topology
    • H04J2203/0042—Ring

Abstract

Selective tributary switching is realized in a bidirectional transmission system by selectively switching, in accordance with the same rules governing the set-up and take down procedures of full line-switching, only that portion of the bandwidth of the particular line which has been provisioned to be line-switched. The remaining bandwidth can be left unprotected or, by for the first time combining line-switched ring functionality with path-switched ring functionality in the same ring transmission system, some remaining bandwidth can be path-switched. Furthermore, another degree of switching freedom is achieved in a four optical fiber bidirectional ring transmission system by selectively span-switching, but not ring-switching, specific bandwidth on the line. To this end, communications circuit provisioning information is provided in the ring nodes as to whether a particular communications circuit should be line-switched or not and, if not, whether it should be span- switched, path-switched or left unprotected.
CA002099972A 1992-10-02 1993-07-06 Apparatus and method for selective tributary switching in a bidirectional ring transmission system Expired - Fee Related CA2099972C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US955,789 1992-10-02
US07/955,789 US5406401A (en) 1992-10-02 1992-10-02 Apparatus and method for selective tributary switching in a bidirectional ring transmission system

Publications (2)

Publication Number Publication Date
CA2099972A1 true CA2099972A1 (en) 1994-04-03
CA2099972C CA2099972C (en) 1999-01-26

Family

ID=25497337

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002099972A Expired - Fee Related CA2099972C (en) 1992-10-02 1993-07-06 Apparatus and method for selective tributary switching in a bidirectional ring transmission system

Country Status (5)

Country Link
US (1) US5406401A (en)
EP (1) EP0590872B1 (en)
JP (1) JP3195477B2 (en)
CA (1) CA2099972C (en)
DE (1) DE69327219T2 (en)

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Also Published As

Publication number Publication date
DE69327219D1 (en) 2000-01-13
EP0590872B1 (en) 1999-12-08
CA2099972C (en) 1999-01-26
EP0590872A1 (en) 1994-04-06
US5406401A (en) 1995-04-11
DE69327219T2 (en) 2000-07-06
JP3195477B2 (en) 2001-08-06
JPH06205028A (en) 1994-07-22

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