Telefonaktiebolaget Lm Ericsson (publ)

Mario Ascione

Amedeo Imbimbo

Francesca Marfia

Andrea Senatore

Francesco Toro

Tiziana Bellavista

Domenico Raffaele Cione

Methods and devices employed in providing lawful interception (LI) by products related to a service session of an LI target as a unique chain. The packets sent to a legal enforcement agency are chained and have shorter headers. The number of packets is reduced by including both intercept-related information (IRI) and content of communications (CC) in the same packet if time-wise appropriate.

Lawful interception chain in service providing networks

A declarative mechanism is provided in the context of lawful interception (LI). A manifesto with information that specifies LI of a communication service or application is created and declared by a service or application provider who, is subject to LI. The declaration takes place in that the manifesto is provided from a first LI function to other LI functions in a communication system. LI data (e.g., call data record, intercept related information and call content) is subsequently generated during LI according to the manifesto by a point of interception within the service or application. The point of interception delivers the LI data to a mediation and delivery function that then forwards it to a law enforcement agency. The law enforcement agency knows how to read and manage the LI data from the manifesto.

Lawful interception manifesto

A mediation function receives intercepted signaling and media payload messages from an IP Multimedia Subsystem, IMS. Local correlation numbers () are calculated and a table () comprising correlation numbers () and media payload mapping information () is maintained in order to enable the mediation function to provide a law enforcement agency, LEA, with intercepted media payload together with information that enables the LEA to decode the media payload in real-time.

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Torre del Greco, Italy

Mario Ascione