• Header: General information on the generated report, including the time interval within which the logfile data was collected.

• KPI Definitions: Definitions of KPIs included in the report. These are also provided in the present document, embedded in more detailed explanations of signaling and other things.

• KPI Overview: A summary of the most important KPIs related to VoLTE sessions, voice quality, IMS server registration, presence, and LTE RRC connections and handovers. All of these topics are covered in more detail in other worksheets.

• Session Statistics: Statistics on VoLTE session setup and completion.

• Quality (Integrity) Statistics: Statistics on voice quality: POLQA scores, speech path delay.

• Registration Statistics: Statistics on VoLTE client registration to IMS server.

• Negative Events: Statistics on some failure events gathered in one place: VoLTE session setup and session completion failures; IMS registration failures.

• Negative Events (2): Same failure events covered as in Negative Events; here full listings are provided of all instances of these events, with references to the logfiles where they occur.

• RTP Statistics: Statistics on jitter and packet loss, based on RTP signaling.

• Presence: Statistics on presence subscription and publish requests.

• LTE Statistics: Statistics on EPS bearer, RRC connections (setup, completion), and handover interruption times.