Telefonaktiebolaget Lm Ericsson (publ)

Rita Di Donato

Raffaele De Santis

Luca Di Serio

Roberto Cicco

Biagio Maione

Giuseppe De Simone

Cristiano Rabboni

Embodiments of the present invention include methods and arrangements to detect an end-to-end call on a AMR-WB capable network involving at least one monitored identity. According to an embodiment of the invention, call events related to the at least one monitored identity through at least one intercepting control element in a telecommunication network is monitored. A start notification message by the at least one intercepting control element is delivered whenever an AMR-WB codec is chosen in the telecommunication network as a selected codec for an end-to-end call between the at least one monitored identity and another identity.

Method to detect calls on an AMR-WB capable network

The present invention relates to methods and arrangements for optimizing monitoring capacity in a telecommunication system comprising at least one information element receiving unit. One activity report request along with identities of a target to be monitored are received at the element receiving unit. At least two information elements belonging to a first element group, related to the specified target by different identities and comprise duplicate information are also received at the target. The element receiving unit selects one of the received at least two elements.

One activity report for interception purposes

A node of telecommunications network comprises comparing means for comparing current mobile station ID information with previously stored mobile station ID information. The node also comprises preparing means for preparing a notification message including both the previous mobile station ID information and the current mobile station ID information.

Change detection of target identification data in lawful interception systems

The present application relates to monitoring non-local originating calls in a telecommunication system having a local network part and a non-local network part. A monitoring centre is attached to an Intercept Access Point in the local network part. A monitoring request comprising an external target identification is received from the monitoring centre to the Intercept Access point. A call is set-up of from an originating subscriber in the non-local network part, towards the local network part. An Initial Address Message comprising the originating subscriber's identity is received to the Intercept Access point from the non-local network part. A match is found between the Initial Address Message and the received target identification. Monitoring information related to the matched target is transferred from the Intercept Access Point to the monitoring centre.

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