CONTENTS

�1���� Scope�
�2���� References�
�3���� Terms and Definitions������
�4���� Abbreviations and Acronyms�������
�5���� Relationship to Global Information Infrastructure���
�6���� Relationship to ITU-T Rec. X.200 � OSI Basic Reference Model
�7���� Basic functionality divisions in NGN���������
������� 7.1���� Separation between services and transport�
������� 7.2���� Relationships between NGN basic reference model and ITU-T Recs G.805, G.809 and������ Y.110����
�8���� General functional model��
������� 8.1� ���Functions
������� 8.2���� Resources�
�9���� Multi-layer aspects����������
������� 9.1���� Inter-layer and intra-layer interaction����������
������� 9.2���� Co-ordination activities������
������� 9.3���� Multi-layer network scenario in NGN��������
10���� Service convergence by NGN����
11���� Multimedia services��������
������ 11.1���� The support of multimedia services
������ 11.2���� The access to the services and the support (of the services) requests����������
12���� Identification and location
13���� Emergency communications��������
14���� Interactions between NGNs and non-NGN environments
15���� Security����
16���� Quality of Service (QoS)
������ 16.1���� QoS classes���������
������ 16.2���� QoS control mechanisms��
������ 16.3���� QoS control functional architecture
������ 16.4���� QoS control/signalling�������
Annex A � Relationship of NGN to OSI BRM����
������� A.1���� Distribution of layer functionality����
������� A.2���� Ordering of protocol layers�����������
������� A.3���� Peer semantics of layers����
������� A.4���� Mode of transmission��������
Annex B � Principles retained/not retained from X.200 for NGN����
������� B.1���� X.200 parts applicable to NGN����
������� B.2���� X.200 parts not applicable to NGN�����������
Appendix I � Example of convergence of services����
������� I.1���� �� Service scenario���
������� I.2���� �� System configuration��������
Appendix II � Interactions between NGNs and non-NGN environments����
������ II.1���� Introduction�����������
������ II.2���� Principle for IWF between NGNs��
������ II.3���� Agent model for interworking���������
BIBLIOGRAPHY����