Verfahren und Netzwerksystem zum Überwinden von Medienkoordinierten Angriffen auf Notrufnetzwerke

Details

Veröffentlichungs-Nr.

EP4096181

Aktenzeichen

EP21175767

Anmeldetag

25. Mai 2021

Veröffentlichung

15. November 2023

Erteilung

15. November 2023

Rechtsraum

EP

IPC

H04L9/40

Abstract

The invention relates to a method for defeating media-coordinated attacks on emergency call networks. The method comprising the steps, receiving, by a first ESRP element, a session initiation request with a session description Protocol (SDP) body wherein the session initiation request deviates from a preconfigured media threshold k from a caller. Following, logging the session initiation request which deviates from a preconfigured media threshold k in a set of requests. Then sending an alert notification to a second ESRP element and/or other ESRP elements. Subsequently, verifying if there is a transcoding impact in the routing element that will handle the call. If no transcoding impact is present the call is transferred. Otherwise, gathering and analyzing alert notifications which have been received using the subscribed/notify mechanism for a potential media-coordinated attacks form other ESRP elements in the network. Then evaluating the alert notifications from the other ESRP elements to deduce if there is any media-capable element in any one of the ESRP elements in the network which can handle the call without transcoding. If this is possible then the call is routed without transcoding. However, if this is not possible then downgrading the call to audio only and routing the call to the first PSAP element.

Anmelder

Firma

Unify Patente GmbH & Co. KG

Land

🇩🇪 Deutschland

Fachgebiete