Method and system for legal monitoring of public service in IP multimedia subsystem
A technology for multimedia subsystems and public services, which is applied in the field of legal interception of information related to the monitoring of public services, and can solve problems such as inability to meet public service monitoring and public service monitoring, and achieve good implementability and scalability.
Active Publication Date: 2009-07-22
ZTE CORP
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[0019] In the above methods, the SIP messages of (2) and (7) sessions pass through the S-CSCF, and the IRI monitoring of public services can be carried out through the S-CSCF, while the other 5 routing methods, because the SIP messages do not pass through the S-CSCF or The passed S-CSCF is uncertain, which makes it impossible to perform IRI monitoring of public services through the S-CSCF
[0020] From the above analysis, it can be seen that since the IP multimedia subsystem adopts the structure of separation of business and control, and the routing mode of signaling related to public services is relatively flexible, purely according to the protocol formulated by 3GPP, through the core network equipment (P-CSCF and S-CSCF) have been unable to meet the monitoring of public services
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[0065] A method for implementing lawful interception of information related to public service interception of the IP multimedia subsystem in this embodiment will be described in detail below in conjunction with the accompanying drawings.
[0066] figure 1 It is a structural diagram of IP Multimedia Subsystem IRI Lawful Interception defined by 3GPP, showing the network elements and connections involved in IRI Lawful Interception, including LEMF 11 (Law Enforcement Monitoring Facility, monitoring center monitoring equipment), ADMF 12 (Administration Function , monitoring management function module), DF2 13 (Delivery Function 2, delivery function module), P-CSCF / S-CSCF 14 (Proxy CSCF / Serving CSCF, proxy CSCF / serving CSCF). LEMF sends monitoring request to ADMF through HI1 interface, ADMF controls DF2 and P-CSCF / S-CSCF respectively through X1-1 and X1-2 internal interfaces, when monitoring is activated, P-CSCF / S-CSCF will monitor the information It is sent to DF2 through the inte...
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The invention provides a method and a system for legally intercepting public services identified by PSI by introducing a monitoring module into an application server AS in an IP multimedia subsystem. After the monitoring management function module receives the monitoring request to the public service sent by the monitoring center, it determines the application server where the public service identifier belongs, and sends a monitoring request to the monitoring module of the application server; the monitoring module starts monitoring the session , and then return confirmation information to the monitoring center through the monitoring management function module; the monitoring module sends a message that meets the monitoring conditions to the monitoring center; Send a cancellation request, and return a confirmation message to the monitoring center through the monitoring management function module. The invention can be applied to monitoring under different PSI routing mechanisms in the IP multimedia subsystem.
Description
technical field [0001] The present invention relates to a method for legally intercepting services in an IP multimedia subsystem (IP Multimedia Subsystem, IMS) and a system thereof, in particular to a method for legally intercepting information related to the interception of public services represented by public service identifiers in the IP multimedia subsystem and its system. Background technique [0002] In order to protect public interests and national security, the laws of various countries stipulate that telecom operators must be able to provide legal interception services. The lawful interception business is a regulated business, which means that according to the requirements of the national law enforcement agency (Law Enforcement Agency, LEA), the telecommunications network has the communication content (Content of Communication, CC) and interception related information (Intercept Related Information, IRI) capabilities. Communication content CC refers to the actual...
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IPC IPC(8): H04L12/26H04L12/56H04L12/24H04L29/06
Inventor 郝振武
Owner ZTE CORP