Origin Host and Origin Realm for Gx
For each subscriber, SMF maintains a record of the Origin-Realm and Origin-Host attribute information sent by PCRF through Diameter messages. If there’s any value change to the Origin-Host and Origin-Realm attributes, SMF updates the latest value and interacts with the corresponding destination host. Later, SMF increments the policy_pcrf_dest_host_change statistics for every change in the attribute value.