1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Network reference model
7 Network limits
7.1 Network limits at reference point A
7.2 Network limits at reference point B
7.3 Network limits at reference point C
7.4 Network limit at reference point D
7.5 Network limit at reference point E
Appendix I – Clock models for noise accumulation simulations
I.1 T-BC models for noise accumulation simulations
I.2 End-to-end TC models for noise accumulation simulations
Appendix II – HRMs used to derive the network limits
II.1 HRM composed of T-BCs
II.1.1 HRM without physical layer frequency support from
the network
II.1.2 HRM with physical layer frequency support from the
network
II.1.3 HRM for cluster-based synchronization
II.2 HRM composed of T-BCs and T-TCs
II.2.1 HRM with physical layer frequency support from the
network
Appendix III – Network limits considerations
III.1 Measurement of network limits in case of deployment case 1
Appendix IV – Constant and dynamic time error and error accumulation
IV.1 Introduction
IV.2 Components of time error
IV.3 Accumulation of time error in a chain of clocks
Appendix V – Example of design options
V.1 Network limits
V.2 Components of time error budgets
V.3 Failure scenarios
V.4 Time error budget allocation
V.5 Operator options
V.6 Further details
Appendix VI – Mitigation of time error due to synchronous Ethernet transients
Appendix VII – Maximum relative time error
Appendix VIII – Models for budgeting in a chain of microwave devices
Appendix IX – Models for Budgeting in a chain of xPON or xDSL devices