Rec. ITU-T G.989.3 (05/2021) iii
Table of Contents
Page
1 Scope ............................................................................................................................ 1
2 References..................................................................................................................... 2
3 Definitions .................................................................................................................... 2
4 Abbreviations and acronyms ........................................................................................ 2
5 Conventions .................................................................................................................. 3
6 NG-PON2 transmission convergence layer overview .................................................. 3
6.1 TWDM transmission convergence layer ........................................................ 3
6.2 PtP WDM AMCC transmission convergence layer overview ....................... 17
7 TWDM resource allocation and quality of service ....................................................... 21
7.1 Principles of downstream and upstream resource allocation ......................... 21
7.2 Dynamic bandwidth assignment overview ..................................................... 23
7.3 Reference model of dynamic bandwidth assignment ..................................... 26
7.4 DBA performance requirements ..................................................................... 30
8 NG-PON2 transmission convergence framing sublayer............................................... 31
8.1 TWDM transmission convergence framing sublayer ..................................... 31
8.2 PtP WDM management framing sublayer ...................................................... 38
9 TWDM encapsulation method ...................................................................................... 40
9.1 XGEM framing ............................................................................................... 40
9.2 XGEM frame delineation ............................................................................... 42
9.3 SDU fragmentation ......................................................................................... 42
9.4 Mapping of services into XGEM frames ........................................................ 44
10 NG-PON2 PHY adaptation sublayer ............................................................................ 45
10.1 TWDM PHY adaptation sublayer .................................................................. 45
10.2 PtP WDM management PHY adaptation sublayer ......................................... 58
11 NG-PON2 PLOAM messaging channel ....................................................................... 61
11.1 Overview ........................................................................................................ 61
11.2 PLOAM message format ................................................................................ 62
11.3 PLOAM message definitions ......................................................................... 65
12 NG-PON2 ONU activation ........................................................................................... 101
12.1 TWDM PON ONU activation cycle ............................................................... 101
12.2 PtP WDM ONU activation cycle ................................................................... 117
13 NG-PON2 OLT and ONU timing relationships ........................................................... 126
13.1 TWDM ONU transmission timing and equalization delay ............................ 126
13.2 Time of day distribution over TWDM Channel ............................................. 133
13.3 PtP WDM ONU transmission timing ............................................................. 136
14 TWDM performance monitoring, supervision and defects .......................................... 136
14.1 Performance monitoring ................................................................................. 136
