Table of Contents

Intellectual Property Rights
Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Protection classifications and traffic patterns
  4.1 Protection classifications
  4.2 Traffic patterns for rings
5 Network requirements for protection
  5.1 Core network
  5.2 Regional network
  5.3 Local/access network
  5.4 General protection objectives
6 Multiplex section trail protection schemes
  6.1 Multiplex section trail linear protection
  6.2 Two-fibre MS SPRing
  6.3 Four-fibre MS SPRing
  6.4 Multiplex Section Dedicated Protection Ring
      (MS DPRing)
7 Linear VC trail
  7.1 Network architecture
  7.2 Network objectives
  7.3 Application architecture
  7.4 Switch initiation criteria
  7.5 Functional models
  7.6 Protection interworking
  7.7 APS protocol
8 SDH Sub-Network Connection (SNC) protection
  8.1 Network architecture
  8.2 Network objectives
  8.3 Application architecture
9 Comparison of protection schemes
  9.1 Bandwidth efficiency
  9.2 Capability to protect a selected part of
       the traffic
  9.3 Compatibility with secondary traffic
  9.4 Level of protection
  9.5 Response time
  9.6 Transmission delay
  9.7 Multiple failures in a cascade of sub-networks
  9.8 Interworking
  9.9 Applicable to network architectures other than
       rings
  9.10 Connection type
  9.11 A comparison of SNC/I and SNC/N
  9.12 LO VC access in a MS SPRing
10 Examples of network protection applications
  10.1 General objectives of protection
  10.2 Core network
  10.3 Access network
11 Summary and conclusions
Annex A (informative): Derivation of the maximum
          number of nodes of MS rings
      A.1 General concept
      A.2 MS DPRing
      A.3 MS SPRing
      A.4 Comparison for AU-4 granularity
      A.5 Pictorial description of the maximum
          number of nodes in a STM-16 ring with
          VC-4 granularity and for uniform and double
          hub traffic patterns
Annex B (informative): Use of SNC protection inside
        a tandem connection sublayer
Annex C (informative): Bibliography
History

Abstract

Describes the network objectives, architectures, applications, auto-matic protection switching (APS) functionality, switching initials criteria and operations of STH shared mpx section bidirectional and uni-directional self healing rings (MS-BSHR,MS-USHR), and dedicated path switching ring.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TM 3