Dynamic Subscription revoking provision
This feature enables 5G network to revoke subscription of specific UE. It is required that user identifies the IP-Address of specific UE to be disabled. The custom user application can make available the IP-Address of specific UE to 5G core network via Metric-Function API. The 5G network shall revoke the specific UE’s subscription based on UE IP-Addresses received.
Following diagram show one such use case of identifying malicious UE and then revoking its subscription from 5G core.
The UPF shall detect malicious UE IP-Address and the user application shall learn it.
The user application shall maintain the malicious subscriber’s IP Address.
The Controller functionality of the MetricFunction shall keep polling the user application to fetch malicious subscriber’s IP Address.
The metricfunc manages all subscriber contexts, so the Controller identifies the IMSI associated to malicious Subscriber IP.
The MetricFunc Pod notifies the ROC to disable the SIM Card associated with malicious subscriber.
ROC updates the Config Server(webui) with updated Device Group(s) and slice(s) information.
AMF initiates a network-triggered deregistration procedure to detach the UE from the 5G core.
The Metric-Function configuration to poll the user application