GR 2837 CORE : ISSUE 4

1 Introduction
1.1 Purpose and Scope
1.2 Target Audience
1.3 Structure and Use of This Document
1.4 Major Changes from Issue 3
1.5 Requirements Terminology
1.6 Requirement Labeling Conventions
1.6.1 Numbering of Requirement and Related Objects
1.6.2 Requirement, Conditional Requirement and Objective Object
        Identification
2 Background and Terminology
2.1 SONET ATM Transport Networks
2.2 Terminology and Definitions
2.2.1 Summary
2.2.2 Conventional SONET Transport NEs
2.2.2.1 SONET ADM
2.2.2.2 Unidirectional Path-Switched Ring Overview
2.2.2.3 Bidirectional Line-Switched Ring Overview
2.2.2.4 SONET DCS
2.2.3 ATM Transport NEs
2.2.3.1 ATM SAM
2.2.3.2 ATM ADM
2.2.3.3 ATM Cross-Connect
2.2.4 ATM Switching Systems
2.2.4.1 ATM Edge Switch (ES)
2.2.4.2 ATM Hub Switch (BSS)
2.2.5 Hybrid Transport NEs
2.2.5.1 Hybrid ADM
2.2.5.2 Hybrid DCS
2.2.6 Subnetwork Architectures
2.2.6.1 Access Transport
2.2.6.2 Interoffice Transport
2.2.6.3 Grooming
2.2.6.4 Switching
2.3 Efficiency of ATM Transport in Hybrid Rings
2.4 Overview of ATM Protection Switching in SONET ATM VP Rings
2.4.1 Ring Types and Protection Types
2.4.2 ATM Traffic Protected via STM Layer Protection
2.4.3 ATM Traffic Protected via ATM Layer Protection
2.4.4 ATM Traffic Protected Externally
2.5 Ring Interconnection Overview
3 Network Applications
3.1 Access Rings
3.2 Interoffice Rings
3.3 Interconnected Rings
3.3.1 Basic Interconnections
3.3.2 Specific ATM Ring Interconnection Applications
3.3.2.1 Interconnections Between Pure ATM Rings
3.3.2.2 Logical Ring Interconnection
3.4 Point-to-ADM, Dual Homing
3.5 Ring Hierarchies
3.6 Hubbing via Ring
3.7 Ring-to-Mesh Interconnection
4 Common ATM Transport Functionality and Criteria
4.1 High-Level Functional Models
4.1.1 Basic Functional Model
4.1.2 Functional Model with SAM Functions
4.1.3 Ring Side Interfaces
4.1.4 Drop Side Interfaces
4.2 Functional Blocks for ATM VP Functionality in a SONET ADM
4.2.1 PHY - Physical Layer Requirements
4.2.1.1 Drop Side Interfaces
4.2.1.2 Ring Side Interfaces
4.2.1.3 Service Access Interfaces
4.2.2 VPM - Virtual Path Multiplexing Requirements
4.2.3 VPL - Virtual Path Link Requirements
4.2.4 VPCE - Virtual Path Cross-Connection Entity Requirements
4.3 Other Requirements
4.3.1 Reliability / Availability
4.3.2 ATM Layer Survivability
4.3.2.1 1+1/1:1 VPG/VP Protection
4.3.2.2 1:n VPG/VP Protection
4.3.2.3 Protection Performance
4.3.3 SONET and ATM Layer Protection Interaction
4.3.4 Ring Interconnection at the ATM Layer
5 Common ATM Operations Functionality and Criteria
5.1 TMN Operations Architecture
5.1.1 Operations Architecture Evolution
5.1.2 Hybrid Operations Architecture
5.2 Operations Functions
5.2.1 Configuration Management
5.2.1.1 External Update Support
5.2.1.2 Memory Update Support
5.2.1.3 Memory Query Support
5.2.1.4 Memory Backup and Restoration
5.2.1.5 Software Download Support
5.2.2 Fault Management
5.2.2.1 Alarm Surveillance
5.2.2.2 Fault Localization and Testing
5.2.3 Performance Management
5.2.3.1 Monitoring of Physical Transport Facilities
5.2.3.2 Protocol Monitoring/Analysis
5.2.3.3 ATM VP Performance Monitoring
5.2.4 Security Management
5.2.5 Accounting Management
5.3 Network Traffic Management
5.3.1 Functions and Procedures for Traffic Management
5.3.1.1 Introduction
5.3.1.2 Connection Admission Control
5.3.1.3 Policing
5.3.1.4 Selective Cell Discard
5.3.2 Traffic Contract
5.3.2.1 Traffic Parameters and Connection Traffic Descriptor
5.3.2.2 Traffic Contract
5.3.3 QoS and Performance
5.3.3.1 SONET ATM VP Ring Performance Objectives by
        QoS Class
5.3.3.2 Multicast ATM Connection Performance Objectives
5.3.3.3 Reference Loads and Measurement
5.3.4 Traffic Management Requirements
5.3.4.1 Traffic Management Requirements for the UPSR
        Environment
5.3.4.2 Traffic Management Requirements for the BLSR
        Environment
5.4 Network Data Collection
5.5 Operations Interfaces
5.6 Operations Flows
5.7 Operations Communications
5.7.1 Upper Layer Requirements
5.7.2 Lower Layer Requirements
5.8 Other Requirements
5.8.1 SONET Function Enabling/Disabling
5.8.2 Operations and Maintenance of ATM Protection Switching
5.8.3 Interaction with ATM Switches
References
2.1 Three Methods of Combining ATM and STM Traffic
2.2 Conventional ATM Switching and SONET Transport Network
2.3 Hybrid SONET/ATM NEs in an Example Network
2.4 Pure ATM NEs in an Example Network
2.5 Layer Structure of STM and ATM Transport Methods
2.6 Unidirectional Path-Switched Ring (UPSR)
2.7 Two-Fiber Bidirectional Line Switched Ring (BLSR)
2.8 Four-Fiber Bidirectional Line Switched Ring (BLSR)Ring Switch
2.9 Four-Fiber Bidirectional Line Switched Ring (BLSR)Span Switch
2.10 Example of SAM Deployment
2.11 Example of SAM Function Implemented in Hybrid NE
2.12 ATM VPX with SONET STM Capability
2.13 ATM VPX with W-DCS 3/1 Capability - More Detailed View
2.14 Hybrid DCS - Segregated Interfaces
2.15 Hybrid DCS - Mixed Interfaces
2.16 Customer ATM Access in Conventional SONET Network: Hub
        Demand
2.17 ATM NE Deployment in Conventional SONET Network
2.18 Customer ATM Access in Conventional SONET Network with
        SAM: Hub Demand
2.19 Customer ATM Access in Conventional SONET Network:
        Different Destinations
2.20 Customer ATM Access in Hybrid Network:
        Different Destinations
2.21 Hybrid Network with SAMs and Edge Switches Near Customer
        Premise
2.22 Deployment of Hybrid Cross-Connects with Ring Functionality
2.23 Conventional SONET OC-12 BLSR (2Fiber) Hubbed ATM Traffic
2.24 Conventional SONET OC-12 UPSR Hubbed ATM Traffic
2.25 Hybrid OC-12 BLSR (2Fiber) Hubbed ATM Traffic
2.26 Hybrid OC-12 UPSR Hubbed ATM Traffic
2.27 Hybrid UPSR with ATM Protection off the Ring
2.28 Dual-Node Ring Interconnection Between SONET UPSRs
2.29 Dual-Node Ring Interconnection Between SONET BLSRs
3.1 Access Hybrid Ring
3.2 Interoffice Hybrid Ring
3.3 Direct Ring Interconnection Between ADMs
3.4 Ring Interconnection Between ADMs Through DCS
3.5 Ring Interconnection Through Ring DCS
3.6 Direct Dual-Node Ring Interconnection Between ADMs
3.7 Dual-Node Ring Interconnection Between ADMs Through DCS
3.8 Dual-Node Ring Interconnection Through Ring DCS
3.9 Dual-Node Ring Interconnection Between ATM UVPSRs
3.10 Single-Node Ring Interconnection with 1+1 Ring
        Interconnection Interfaces
3.11 Dual-Node Ring Interconnection Between ATM UVPSRs - One
        NE Serving more than One Ring Interconnection
3.12 VP Multicasting in Dual-Node Ring Interconnection
        Between ATM VPSRs
3.13 SONET ATM VP Ring to SONET Ring Interconnection
3.14 Point to ADM, Dual Homing
3.15 Ring Hierarchy
3.16 Hubbing Via Hybrid Ring
3.17 Ring-to-Mesh Interconnection, with Distinct Boundary
3.18 Ring-to-Mesh Interconnection
4.1 Basic Functional Model of ATM Functionality Being Added
        to SONET Ring ADM
4.2 Basic Functional Model of ATM Functionality with SAM
        Functions Being Added to SONET Ring ADM
4.3 Minimum ATM VP Functionality in a SONET ADM
5.1 Multi-Tiered Operations Architecture, TMN Model
5.2 TMN Layers and Management Functional Areas
5.3 Operations Architecture Evolution
5.4 TMN Architecture - Hybrid Operations
5.5 An Example CAC Algorithm
5.6 An Example Policing Algorithm for VBR Cells
5.7 An Example Selective Cell Discard Algorithm
5.8 Policing and Shaping of UPSR Traffic
5.9 Policing and Shaping of BLSR Traffic
Tables
2.1 Summary of SONET ATM VP Ring Types
2.2 Summary of Ring Transport Multiplexing and Protection
        Switching Alternatives
2.3 Properties of DCS ATM Functionality Levels

Provides Bellcore's preliminary view of proposed generic functional criteria for incorporating Asynchronous Transfer Mode (ATM) Virtual Path (VP) functionality into Synchronous Optical Network (SONET) rings. This document introduces a modified terminology for SONET, ATM, and Hybrid SONET/ATM entities and provides a general SONET ATM ring evolution overview.