Lawful Interception (LI) is a system which monitors a user or a communication in support of criminal investigation. It is a necessary function of the telecommunication operator. The telecommunication standards bodies ...Lawful Interception (LI) is a system which monitors a user or a communication in support of criminal investigation. It is a necessary function of the telecommunication operator. The telecommunication standards bodies such as ETSI, 3GPP are producing technical specifications on LI system, and have developed standards on handover areas and interception areas which can guide the implement. IP Multimedia Subsystem (IMS) is a new core-network architecture introduced after the version of 3GPP Release 5, which is layer-designed, IP-based, and using Session Initiation Protocol (SIP) as application protocol. There are two typical implementations of LI within IMS, distributed type and centralized type.展开更多
文摘Lawful Interception (LI) is a system which monitors a user or a communication in support of criminal investigation. It is a necessary function of the telecommunication operator. The telecommunication standards bodies such as ETSI, 3GPP are producing technical specifications on LI system, and have developed standards on handover areas and interception areas which can guide the implement. IP Multimedia Subsystem (IMS) is a new core-network architecture introduced after the version of 3GPP Release 5, which is layer-designed, IP-based, and using Session Initiation Protocol (SIP) as application protocol. There are two typical implementations of LI within IMS, distributed type and centralized type.
