Beware of all call drops

As a user you know for sure when your call drops. Yet, as a mobile service provider you probably don’t. The reason is that conventional call drop detection relies on data provided by individual network elements, e.g. in the RAN. This view often does not match the user experience.

We at Voipfuture care about user experience and thus implemented call drop detection based on the analysis of user behavior. When your 4G call drops, you will typically try to re-establish the call. Qrystal takes these redial calls and inspects their RFC 3326 SIP reason headers. Machine-learning is then used to determine the headers that indicate call drops.

The result: Qrystal’s dropped call ratio (DCR) is in line with values determined by drive tests. Even better: the data is available 24/7, for your entire network.