Number refilling method applied to 2G (second generation) network and communication monitoring system

Abstract

The invention provides a number refilling method applied to a 2G (second generation)_network and a communication monitoring system. The number refilling method comprises the following steps: monitoring a UE (user equipment) location updating process on an interface A, and acquiring the initial TMSI (temporary mobile subscriber identity), initial location area code, effective TMSI and effective location area code of the UE; judging whether a mapping relation between the IMSI (international mobile subscriber identity) and TMSI of the UE is stored according to the initial TMSI and the initial location area code, if the mapping relation is stored, substituting the effective TMSI and the effective location area code for the TMSI and effective location area code in the mapping relation; if the mapping relation is not stored, judging whether a signalling in the location updating process carries the IMSI of the UE, if the signalling carries the IMSI of the UE, generating the mapping relation between the IMSI and the TMSI and storing the mapping relation; and monitoring a service process on the interface A, judging whether the signalling in the service process carries the IMSI of the UE, if the signalling does not carry the IMSI of the UE, inquiring the mapping relation between the IMSI and TMSI of the UE according to the effective TMSI and effective location area code of the UE which are carried in the signalling of the service process to determine the IMSI of the UE. According to the invention, the real identity of the UE can be determined only by monitoring the service process which carries the TMSI of the UE on the interface A.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a number backfill method and a communication monitoring system applied to 2G networks. Background technique [0002] In the mobile communication system, each mobile UE (User Equipment) is identified by a unique IMSI (International Mobile Subscriber Identity, International Mobile Subscriber Identity). In order to ensure the security of user information, in normal business communication, Usually, a TMSI (Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity) is used instead of an IMSI to identify a user. The TMSI is a temporary identifier, which can be allocated to different users at different times, and the TMSIs allocated to the same user at different times or in different places are often different. [0003] A interface refers to the interface between BSC (Base Station Controller, base station controller) and MSC (Mobile Switching Center, mobile swit...

AI Technical Summary

Problems solved by technology

[0004] Since the signaling of some business processes only carries the TMSI of the UE and does not carry the IMSI of the UE, when detecting and monitoring these business processes, only the TMSI of the user can be monitored, and the mobile UE and the TMSI do not have a unique mapping relationship , so that the real identity of the UE cannot be known based on the monitored TMSI

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