Monitoring Event Subscription

To subscribe a new monitoring event configuration, the SCS/AS sends an HTTP POST message to the SCEF. The body of the HTTP POST message includes the Monitoring Type, and may include External Identifier(s) or MSISDN(s) or External Group ID, Maximum Number of Reports, Monitoring Duration, T8 Destination Address, and Group Reporting Guard Time, where the External Identifier or MSISDN indicates the subscription for an individual UE and the External Group ID indicates a group of UEs. SCEF generates a corresponding subscription ID for a new subscription request.

Note:

SCEF always gives higher preference to an External Identifier when both Identifiers (External Identifier and MSISDN) are present in the Monitoring Event Configuration Request message.

The SCS/AS sends a Monitoring Subscription Request (External Identifier or MSISDN or External Group ID, Monitoring Type, Maximum Number of Reports, Monitoring Duration, T8 Destination Address, and Group Reporting Guard Time) message to the SCEF.

If the SCS/AS wants to configure Monitoring Event for the group of UEs, the SCS/AS can send a Monitoring Request message including External Group Identifier and Group Reporting Guard Time. A Group Reporting Guard Time is an optional parameter to indicate aggregated Monitoring Event Reporting(s), which has been detected for the UEs in a group, needs to be sent to the SCS/AS once the Group Reporting Guard Time is expired.

The SCEF stores the SCS/AS Identifier, T8 Destination Address, Monitoring Duration, and Maximum Number of Reports. The SCEF generates a subscription ID in case of a new POST request.

The SCEF sends a Monitoring Request (External Identifier or MSISDN or External Group Identifier, SCEF ID, SCEF Reference ID, Monitoring Type, Maximum Number of Reports, and Monitoring Duration) message to the HSS to configure the given Monitoring Event on the HSS in Configuration-Information-Request (CIR) message.

After processing, HSS sends a Configuration-Information-Answer (CIA) message. Then according to the result code received in the CIA message, if the result code is Success (2001), the SCEF sends a Monitoring Response (Subscription, Configuration Results, Monitoring Event Reports and Cancel Indication) message to the SCS/AS to acknowledge acceptance of the Monitoring Request; if the result code is not successful, then an error result code informs the SCS/AS about the error occurred/received.

Figure 5-9 Monitoring Event Subscription