�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��� �High-level requirements����
�7��� �Functional requirements���
������ �7.1��� �Metering functional
requirements����
������ �7.2��� �Charging functional
requirements����
������ �7.3��� �Accounting and
charging protocol high-level functional requirements
������ �7.4��� �Accounting and
charging information model high-level functional requirements���������
�8��� �Architectural framework��
������ �8.1��� �Overall architectural
framework�����
������ �8.2��� �Functional
architecture�������
������ �8.3��� �Reference points����
�9��� �Security consideration������
Appendix I � Offline and online charging scenarios��� �
������ �I.1��� ��� Scenario for
offline charging���������
������ �I.2��� ��� Scenario for online
charging����������
Appendix II � Study on existing accounting and charging
practices��� �
����� �II.1��� �Accounting and
charging practice in PSTN�
����� �II.2��� �Accounting and
charging practice in 3GPP��
����� �II.3��� �Accounting and
charging practice in ATIS TMOC��
����� �II.4��� �Accounting and
charging practice in the Internet������
����� �II.5��� �Charging and
accounting practice in ETSI TISPAN
����� �II.6��� �Comparison�����������
Bibliography��� �