Rec. ITU-T G.987.1 Corrigendum 1 (03/2020) 10-Gigabit-capable passive optical networks (XG-PON): General requirements
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Architecture of the optical access network
     5.1 Network architecture
          5.1.1 FTTB scenario
               5.1.1.1 FTTB for MDU-served residential users
               5.1.1.2 FTTB for MTU-served business users
          5.1.2 FTTCurb and FTTCab scenario
          5.1.3 FTTH scenario
          5.1.4 FTTO scenario
          5.1.5 FTTCell wireless scenario
          5.1.6 Environment conditions in outdoor scenarios
     5.2 Reference configuration
          5.2.1 ODN architectures
          5.2.2 Operating wavelength for G-PON and XG-PON
          5.2.3 User network interface (UNI) and service node interface (SNI)
          5.2.4 Interface at reference points S/R and R/S
          5.2.5 Layered structure of XG-PON optical network
6 Migration scenarios
     6.1 Migration from legacy PON to XG-PON
     6.2 Migration from XG-PON1 to XG-PON2
     6.3 Overlay of XG-PON or hybrid XG-PON
     6.4 RE architecture options
7 Service requirements
     7.1 Services
     7.2 Maximum/mean signal transfer delay tolerance
     7.3 Maximum Ethernet packet size
     7.4 Synchronization features and quality
     7.5 Leased line T1/E1 emulation
     7.6 QoS and traffic management
8 Physical layer requirements
     8.1 Fibre characteristics
     8.2 Optical wavelengths of XG-PON
     8.3 Bit rates
     8.4 Optical power budget
     8.5 Split ratio
     8.6 Fibre distance
9 System level requirements
     9.1 Power saving and energy efficiency
     9.2 Authentication/identification/encryption
     9.3 Dynamic bandwidth assignment (DBA)
     9.4 Eye safety
10 Operational requirements
     10.1 ONU management
          10.1.1 OMCI managed ONU
          10.1.2 Dual managed ONU
     10.2 PON supervision
11 Resilience and protection on ODN
Appendix I  Examples of practical XG-PON system architecture
     I.1 Services, UNIs and SNIs
          I.1.1 Examples of services
          I.1.2 Examples of UNI
          I.1.3 Examples of SNI
     I.2 Typical system architectures
          I.2.1 OLT variants
          I.2.2 ONU variants
     I.3 Service protocol stacks
          I.3.1 Common functions
          I.3.2 Data functions
          I.3.3 Voice functions
          I.3.4 Circuit emulation functions
          I.3.5 Video overlay functions
Appendix II  Synchronizing requirements for wireless in CBU scenario
Appendix III  External access network back-up
Appendix IV  Operation with IEEE 1588: Principles
Appendix V  Operation with IEEE 1588: Use cases for frequency and time of day synchronization
Appendix VI  Operation with IEEE 1588
Bibliography