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Functional requirements of resource control application New resource control mode – Push Mode is needed in support of other scenarios The resource control request is initiated by the network (e.g. application functions) rather than path-coupled signaling from endpoints The resource control decisions are directly pushed down to the network elements (i.e. Policy enforcement point) by the decision function (i.e. policy decision point) The network elements are still allowed to request the re-authorization of resource control decisions due to special events (e.g. change of certain policies or failure recovery) It is highly desirable to develop a universal functional model to support both Push mode and Pull mode |