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ITU G.983.4:2001

ITU G.983.4:2001 A Broadband Optical Access System With Increased Service Capability Using Dynamic Bandwidth Assignment Specifies requirements for adding Dynamic Bandwidth Assignment (DBA) functionality to the Broadband Optical Access Systems defined in ITU-T Rec. G.983.1. Provides specifications for DBA operation and

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Table of Contents

FOREWORD
CONTENTS
1Introduction
1.1Scope
1.2Background
1.2.1Bandwidthassignmentinnon-DBAG.983.1systems
1.2.2EnhancingthebandwidthassignmentonG.983.1
PONsystems
1.2.3Effectivenessofdynamicbandwidthassignment
1.2.4GeneralDBAapproaches
1.2.5FeaturesandMigrationscenariosforDBA
1.2.6RequirementsforthisRecommendation
1.2.7Layeredarchitecture
1.3ArchitecturalDrawing
1.4T-CONTpriorityhierarchy
1.5Objectives
2References
3Abbreviations
4Definitions
5Architectureoftheopticalaccessnetwork
5.1Networkarchitecture
5.1.1FTTCab/C/Bscenario
5.1.2FTTHscenario
5.1.3DBAinstallationsScenarioforFTTx
5.2Referenceconfiguration
5.2.1Servicenodeinterface
5.2.2InterfaceatthereferencepointsS/RandR/S
5.3Functionalblocks
5.3.1Opticallinetermination
5.3.2Opticalnetworkunit/opticalnetworktermination
5.3.3Opticaldistributionnetwork
5.4ONU/ONTfunctionalblock
5.4.1NSR-ONU/ONTfunctionalblock
5.4.2SR-ONU/ONTfunctionalblock
5.5OpticalLineTerminationfunctionalblock
5.5.1Non-DBA-OLTfunctionalblock
5.5.2DBA-OLTfunctionalblock
5.6Opticaldistributionnetworkfunctionalblock
5.6.1Passiveopticalelements
5.6.2Opticalinterfaces
6Services
7UsernetworkinterfaceandservicenodeInterface
8Opticalnetworkrequirements
8.1Layeredstructureoftheopticalnetwork
8.2Physicalmediumdependentlayerrequirementsforthe
ATM-PON
8.3Transmissionconvergencelayerrequirementsforthe
ATM-PON
8.3.1Point-to-multipointcapacitiesfordownstream
andupstream
8.3.2Maximumpayloadcapacitiesfordownstreamand
upstream
8.3.3Downstreaminterface
8.3.4Upstreaminterface
8.3.5TransportspecificTCinterface
8.3.6ATMspecificTCfunctions
8.3.7OAMfunctions
8.3.8MessagesinthePLOAMchannel
8.3.9Automaticprotectionswitching
8.4Rangingmethod
8.4.1Scopeoftheappliedrangingmethod
8.4.2FeaturesofrangingmethodforDBA
8.4.3Phaserelationspecificationbetweendownstream
andupstream
8.4.4Definitionofmessagesusedintheranging
protocol
8.4.5Rangingprocedure
8.4.6Rangingtimerequirements
8.5Handshakeprocedures
8.5.1Overallhandshakeprocedure
8.5.2Negotiatedparameters
8.5.3Detailedprocedures
8.6OperationsforcreationanddeletionofT-CONTs
8.6.1RequirementsforoperationsofT-CONTstatus
change
8.6.2OperationsforcreationofT-CONTs
8.6.3OperationsfordeletionofT-CONTs
8.6.4ImpactbyT-CONTstatuschange
9OperationsAdministrationandMaintenance(OAM)
functionality
10Performance
11Environmentalcondition
12Safety
AppendixI-AlgorithmforDBA
I.1AlgorithmsfordetectingONU/ONTstatusforSR-ONU/ONT
I.2AlgorithmsformonitoringcellstreamsatOLTfrom
NSR-ONUs/ONTs
I.3Algorithmstoupdatebandwidth
I.4Algorithmsforgrantassignment
I.5ControlallowingforUpstreamCongestionoftheOLTNNI
AppendixII-Optionsforminislotformatandnegotiating
procedures
II.1ExtendedT-CONTreportingoptions
II.1.1Reporttypefield
II.1.2Reportingcapability
II.1.3Usageofextendedreportingtypes

Abstract

Specifies requirements for adding Dynamic Bandwidth Assignment (DBA) functionality to the Broadband Optical Access Systems defined in ITU-T Rec. G.983.1. Provides specifications for DBA operation and for DBA-related communication between the OLT and the ONUs/ONTs.

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