Legal listening method, legal listening system, packet data gateway, listening center

Abstract

The invention provides a lawful interception method, a lawful interception system, a packet data gateway and an interception center. The lawful interception method comprises the following steps: classifying user plane data transmitted or received by an interception target and retransmitted by the packet data gateway according to service stream; adding service associated mark on the classified user plane data by the packet data gateway for marking the service stream to which the user plane data belongs; reporting the user plane data with the service associated mark to the interception center by the packet data gateway; and selecting corresponding service characteristic information according to the service associated mark by the interception center, and analyzing and recovering the user plane data. According to the technical scheme, the interception center has no need for carrying out flow classification of the reported user plane data according to the service, thereby improving the success rate of service analysis and recovery of the interception center and lowering the design and operation cost of the interception center.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a legal interception method, a legal interception system, a packet data gateway and an interception center. Background technique [0002] Due to the needs of national and public security interests, it is usually necessary to deploy lawful interception functions in public communication networks. Lawful Interception (Lawful Interception) refers to the mechanism of monitoring the activities of the monitored users in the communication system or specific applications on the communication system by national security agencies, such as the Security Bureau and the police station, under the premise of legal authorization. For the sake of simplicity, this article will simply refer to lawful interception as interception. [0003] The listening network generally consists of three parts: the listening center, the listening gateway, and the listening network element. The monitori...

AI Technical Summary

Problems solved by technology

Therefore, when the amount of monitoring user plane data is large, the monitoring center needs to classify a large amount of user plane data. Since the monitoring center for the packet domain is usually built with a general-purpose computer system, it is not suitable for complex business logic that handles a large amount of data. , and if it is built with a communication equipment architecture similar to a packet data gateway, it will increase the design complexity and operating cost of the monitoring center

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