Telefonaktiebolaget Lm Ericsson (Publ)

Mario Ascione

Amedeo Imbimbo

Francesca Marfia

Francesco Toro

Andrea Senatore

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