ITU-T G.989.3 PDF

This Recommendation specifies the transmission convergence layer of 40 Gigabit-capable passive optical network (NG-PON2) systems providing optical access for residential, business, mobile backhaul, and other applications.

This Recommendation specifies:

– the supported nominal line rate combinations and the layered structure of the NG-PON2 time and wavelength division multiplexing subsystem transmission convergence (TWDM TC) layer;

– functionality of the TWDM TC service adaptation sublayer, including the use of 10-Gigabit passive optical network (XG-PON) encapsulation method (XGEM), XGEM frame delineation and service data unit (SDU) fragmentation;

– functionality of the TWDM TC framing sublayer with the specification of the downstream frame and upstream burst formats;

– functionality of the TWDM TC physical interface (PHY) adaptation sublayer, including synchronization, forward error correction and scrambling;

– TWDM PON embedded management functionality, including upstream time-division multiple access and dynamic bandwidth assignment mechanisms;

– the NG-PON2 physical layer operation, administration and management (PLOAM) messaging channel;

– the optical network unit (ONU) activation cycle state machine, covering activation and wavelength channel handover;

– timing aspects of TWDM PON point-to-multipoint operation and time-of-day communication;

– TWDM performance monitoring, supervision, and defects;

– TWDM security including cryptographic mechanisms for authentication, integrity verification, channel isolation and data protection along with the associated key exchange protocols;

– signalling mechanisms and protocols to support ONU power management;

– TWDM wavelength channel management;

– TWDM system protection;

– alien device and rogue ONU behaviour mitigation;

– the layered structure of the NG-PON2 PtP WDM subsystem auxiliary management and control channel transmission convergence (AMCC TC) layer;

– AMCC TC layer functionality for transparent mode;

– AMCC TC layer functionality for transcoded mode;

– functionality of the AMCC TC management service adaptation sublayer;

– functionality of the AMCC TC framing sublayer;

– functionality of the AMCC TC PHY adaptation sublayer;

– functionality of the PtP WDM management framing sublayer;

– specification of the management data unit (MDU) mapping for AMCC PtP WDM management channel;

– specification of the PtP WDM management frame format;

– functionality of the PtP WDM management PHY adaptation sublayer;

– the PtP WDM ONU activation cycle.