The following general and high-level requirements apply for the present IRP:
The NRM defined by this IRP:
Shall support communications for telecommunication network management purposes, including management of converged networks.
Is a member of the Federated Network Information Model (FNIM)  and its information is derived from FNIM Umbrella Information Model (UIM) .
In addition to the above, the following more specific requirement applies:
The Network Resource Model defined by this IRP shall contain IMS specific IOCs and related definitions, supporting IMS entities in the current 3GPP Release.