About SAU Extension
The Simultaneously Active Users (SAUs) KPI is defined as the number of users that are creating calls, sessions, or SMS messages during the busiest hour. It is computed as the number of users that creates a successful INVITE or a MESSAGE SIP request as active. Session Monitor counts how many distinct active users are in a given hour (for example, from 8:00 to 9:00, from 9:00 to 10:00, and so on).
The Simultaneously Attached Users (SAtUs) KPI is defined as the number of subscribers that are successfully attached to the LTE network during the busiest time of the day. It is computed as the number of subscribers (identified by IMSI) that are creating a successful Authentication Information S6a transaction during a given time interval. For the SAtU KPI, the time interval is also based on the clock hour, but can be a multiple of hours (for example,1h, 2h, 3h, 4h or 6h).
Session Monitor measures the KPIs for all the supported intervals, and it is only a matter of querying the interval length that is required. Both the RESTful API and the integrated GUI widgets have controls for selecting the interval lengths.