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1. (WO2017037598) DETAILED CALL RECORDS FOR VOICE OVER LTE CALLS

Pub. No.:    WO/2017/037598    International Application No.:    PCT/IB2016/055120
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: H04M 15/00
H04L 12/14
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: KOVÁCS, László
BÁDER, Attila
HAJDU, Jeno
SZANISZLÓ, György
SZÁSZ, Ferenc
Title: DETAILED CALL RECORDS FOR VOICE OVER LTE CALLS
Abstract:
A performance monitoring system and method is based on a Detailed Call Record (DCR). A DCR contains records of events occurring in different network domains (14, 20, 40) that are related to a single, specific VoLTE call. The DCR events for each VoLTE call cover all legs of the call, and for each call leg, the relevant events are ordered by time. A DCR also contains basic information to identify the call: the IMS Charging Identifier (ICID), the International Mobile Subscriber Identity (IMSI) of all involved subscribers, and the start and stop timestamps of the call. A DCR has all the relevant user plane measurement, radio measurement, and control plane data from all the involved domains (14, 20, 40) for all call legs of a VoLTE call, in contrast to prior art systems that focus only on a single subscriber's activities for a given call. The DCR thus provides a complete view of the call, allowing more complete analytics and troubleshooting. Furthermore, the data are collected and assembled automatically, with results available real-time, or with a few seconds delay.