Procedures for resource management are defined in subclause 10.11 of TS 23.280
MCData services that do not utilize the SIP core e.g. IP connectivity, cannot utilize the resource control functionality of the local outbound / inbound proxy. For these types of service, resource management is handled directly by the Rx interface from the MCData server to the PCRF, which is the MCData‑5
reference point. The Rx interface is defined in TS 29.214
The same types of resource management procedures as defined for SIP based services in TS 23.280
may also be applied for non SIP based services. That is:
Request for unicast resources at session establishment (in this case service initiation);
Request for modification of unicast resources; and
Request for resources with shared priority.