Lawful interception method and architecture for transparent transmission of interception information
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAmedeo Imbimbo, Enrico De Luca
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Abstract
A system, method, and gateway in a telecommunication network for providing intercepted Content of Communications (CC) information from an Intercepting Control Element (ICE) to a Law Enforcement Monitoring Facility (LEMF). The system splits the intercepted CC information into CC control and CC payload information. A control point receives the control information and controls the gateway in accordance with the control information. The gateway receives the payload information and routes it to the LEMF over a payload Handover Interface.
Claims10
A method in a telecommunications network for providing intercepted Content of Communications (CC) information from an Intercepting Control Element (ICE) to at least one Law Enforcement Monitoring Facility (LEMF), said method comprising the steps of:
- at the ICE, splitting the intercepted CC information into CC control information and CC payload information, sending the CC control information to a control point, and sending the CC payload information to a gateway;
- at the control point, processing the CC control information to obtain instructions for controlling the gateway, wherein the processing step includes:
- receiving a Start CC Sending message from the ICE, said Start CC Sending message including a target identity and a correlation number for correlating the CC information with Intercept Related Information (IRI);
- instructing the gateway to perform an asymmetrical connection from the ICE to the gateway;
- sending the Start CC Sending message to the at least one LEMF;
- receiving an acknowledgment from the at least one LEMF;
- and
- forwarding the acknowledgment to the ICE, thereby prompting the ICE to begin sending the CC payload information to the gateway;
- and
- at the gateway, routing the CC payload information to the at least one LEMF based on the instructions from the control point.
A system in a telecommunications network for providing intercepted Content of Communications (CC) from an Intercepting Control Element (ICE) to at least one Law Enforcement Monitoring Facility (LEMF), said system comprising:
- means within the ICE for splitting the intercepted CC information into CC control information and CC payload information;
- a control point for receiving the CC control information and processing the CC control information to obtain instructions for controlling a gateway, wherein the control point includes:
- means for receiving a Start CC Sending message from the ICE, said Start CC Sending message including a target identity and a correlation number for correlating the CC information with Intercept Related Information (IRI);
- means for instructing the gateway to perform an asymmetrical connection from the ICE to the gateway;
- means for sending the Start CC Sending message to the at least one LEMF;
- means for receiving an acknowledgment from the at least one LEMF;
- and
- means for forwarding the acknowledgment to the ICE, thereby prompting the ICE to begin sending the CC payload information to the gateway;
- and
- the gateway connected to the control point, the ICE, and the at least one LEMF, said gateway being connected to the ICE through a payload interface for receiving the CC payload information, and being connected to the at least one LEMF through a payload Handover Interface, the gateway including means for switching the CC payload information to the at least one LEMF based on the instructions from the control point.
Dependencies are inferred from the claim text.