Fiber network survivability

Author

Flanagan, Tom

Volume

28

Issue

6

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

46

Lastpage

53

Abstract

At the transport layer in interoffice and interexchange networks, shared protection rings (SPRINGS) interconnected at matched nodes can provide 100% restoration in milliseconds after cable cuts and central office failures. The author introduces the SPRING and explains how its capacity advantage over other ring configurations enables it to be the most economical solution in more applications. Transport restoration technologies-1+1 diversity, digital crossconnect systems, and SPRINGS-in interoffice and interexchange environments are compared. A representative network study is presented to justify the choice of SPRINGs and matched nodes for the target architecture. Recommendations on how to evolve today´s asynchronous networks in preparation for a fully survivable SONET ring-based network are also provided. Generic ring planning guidelines and network examples are presented to demonstrate how today´s networks can be evolved to provide end-to-end survivable SONET transport. An approach to ring-based network design that simplifies the planning process and minimizes network cost is provided.<>

Keywords

computer networks; digital communication systems; optical links; reliability; system recovery; telecommunication network management; cable cuts; capacity advantage; central office failures; digital crossconnect systems; economical solution; end-to-end survivable SONET transport; generic ring planning guidelines; network cost minimization; ring-based network design; shared protection rings; Accidents; Central office; Circuits; Communication cables; Optical fiber cables; Optical fiber communication; Protection; SONET; Springs; Switches;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.56228

Filename

56228