Table of Contents

�1���� Scope��
������� 1.1���� Line rate parameterization and PMD specification applicability���������������
������� 1.2���� Compliance��
�2���� References
�3���� Definitions
������� 3.1���� Terms defined elsewhere
������� 3.2���� Terms defined in this Recommendation�����������
�4���� Abbreviations and acronyms
�5���� Conventions
�6���� ComTC layer overview���
������� 6.1���� Supported nominal line rates
������� 6.2���� ComTC layer structure��
������� 6.3���� ComTC sublayer functions
������ �6.4���� Management of an HSP system���
������� 6.5���� ComTC architecture��
������� 6.6���� Media access control
�7���� Resource allocation and quality of service��
������� 7.1���� Principles of downstream and upstream resource allocation���
������� 7.2���� Dynamic bandwidth assignment overview���
������� 7.3���� Reference model of dynamic bandwidth assignment��
������� 7.4���� DBA performance requirements
������� 7.5���� Contention-based PON operation��
�8���� ComTC framing sublayer
������� 8.1���� Downstream ComTC framing
������� 8.2���� Upstream ComTC framing
�9���� Encapsulation method��
������� 9.1���� XGEM framing
������� 9.2���� XGEM frame delineation��
������� 9.3���� SDU fragmentation��
������� 9.4���� Mapping of services into XGEM frames
10���� ComTC PHY adaptation sublayer
������ 10.1���� Downstream PHY frame��
������ 10.2���� Upstream PHY frames and upstream PHY bursts����������
������ 10.3���� Forward error correction��
������ 10.4���� Scrambling
������ 10.5���� Downstream Interleaving������
11���� PLOAM messaging channel��������������
������ 11.1���� Overview�����
������ 11.2���� PLOAM message format��������
������ 11.3���� PLOAM message definitions�
������ 11.4���� PLOAM message operation categories�������������
12���� ONU activation cycle�����������
������ 12.1���� Overview�����
������ 12.2���� Activation outline�����
������ 12.3���� Causal sequence of activation events
������ 12.4���� ONU activation cycle state machine��
������ 12.5���� OLT support of ONU activation������������
������ 12.6���� TWDM ONU power levelling�
13���� OLT and ONU timing relationships�
������ 13.1���� ONU transmission timing and equalization delay���������
������ 13.2���� Time of day distribution���������
14���� Performance monitoring, supervision, and defects
������ 14.1���� Performance monitoring�������
������ 14.2���� Defects���������
15���� Security����
������ 15.1���� Threat model��������������
������ 15.2���� Authentication�����������
������ 15.3���� Key derivation������������
������ 15.4���� XGEM payload encryption system�����
������ 15.5���� Data encryption key exchange and activation mechanism�������
������ 15.6���� Integrity protection and data origin verification for PLOAM����
������ 15.7���� Integrity protection and data origin verification for OMCI��������
������ 15.8���� Integrity and data origin verification key switching�����
������ 15.9���� HSP systems with reduced data encryption strength�
16���� Power management
������ 16.1���� Power management configuration and signalling���������
������ 16.2���� Power management parameter definitions���
������ 16.3���� Power management state machine specifications�������
������ 16.4���� Management transactions in the LowPower state������
������ 16.5���� Power saving by channel selection����
17���� TWDM channel management���������
������ 17.1���� TWDM profile announcement������������
������ 17.2���� TWDM ONU calibration��
������ 17.3���� TWDM ONU wavelength channel handover��
������ 17.4���� TWDM ONU wavelength channel locking��������
������ 17.5���� Temporary suspension of a bonded wavelength channel���������
18���� TWDM system protection��
������ 18.1���� OLT CT coordination in 1:1 Type B protection
������ 18.2�� ��OLT CT Type B protection state machine���������
������ 18.3���� Simplified state transition diagram����
19���� Rogue behaviour and its mitigation���������������
������ 19.1���� Rogue ONU behaviour model��������������
������ 19.2���� Behaviour model when coexisting with legacy ONUs�
������ 19.3���� Protection from noise and alien ONUs�������������
������ 19.4���� Troublesome ONU presence detection enabled through idle window
Annex A � Hybrid error control (HEC) decoding and scrambler sequence codes����
Annex B � Forward error correction����
������� B.1���� Low density parity check (LDPC) codes��������������
Annex C � Secure mutual authentication via OMCI����
Annex D � Secure mutual authentication using IEEE 802.1X����
Annex E���� ���������
Annex F � Tuning sequences����
Annex G � Transcoded framing with FEC and OAM for PtP WDM AMCC TC����
Annex H � Wavelength channel bonding����
������� H.1���� Bonded ONU activation�����������
Annex I � Predefined preamble patterns����
������� I.1���� Predefined preamble patterns based on PRBSs
Appendix I � Downstream line data pattern conditioning����
Appendix II � Time of day derivation and error analysis����
Appendix III � Burst profiles����
����� III.1���� Recommended seeds for preambles based on PRBSs���
����� III.2���� Recommended PSBu structure for 12.5 Gbit/s upstream rate���
Appendix IV � Golden vectors����
������ IV.1���� 50G downstream FEC codeword���������
������ IV.2���� PSBu segment preamble based on PRBSs��������
������ IV.3���� Golden vectors of AES-128�����
������ IV.4���� 256-bit MSK derivation��
������ IV.5���� Golden vectors of AES-256�����
������ IV.6���� Golden vectors of SM4
������ IV.7���� Golden vectors of Camellia-128������������
������ IV.8���� Golden vectors of Camellia-256������������
����� IV.9 �����Upstream FEC codeword examples����
Appendix V � Protection examples����
Appendix VI � ICTP: Inter-channel-termination protocol����
Appendix VII � ONU equalization delay coordination across TWDM channels����
Appendix VIII � PON-ID and system identifier examples����
Appendix IX � Quiet window elimination in ONU activation����
������ IX.1���� Scenario A: new dedicated activation wavelength (λDA)�������������
������ IX.2���� Scenario B: legacy dedicated activation wavelength (λDA)����������
������ IX.3���� Scenario C: legacy dedicated activation wavelength (λDA)����������
Appendix X � 50G ONU synchronization state machine and transition criteria����
������� X.1���� Transition criteria in ONU synchronization state machine���������
������� X.2���� ONU synchronization state machine���
Bibliography����