Method and system for limiting mobile terminal roaming

Abstract

The invention discloses a method and system to limit mobile terminal (MS) roaming. The method is used to set the filtration processing module with GTP analytic function to restrict on MS roaming, and the filtering condition is set in the filtration processing module, When the filtration processing module receives the establishment requiring message of the GTP tunnel from the SGSN, If the corresponding information carried in the establishment requiring message of the GTP tunnel is matched with the setting filtering condition, the filtration processing module will limit the MS roaming. The invention saves the GGSN resources and improves the handling performance of GGSN.

Description

Technical field [0001] The present invention relates to General Packet Radio Service (GPRS), in particular to a method and system for restricting roaming of a mobile terminal (MS) in a GPRS network. Background technique [0002] GPRS is a wireless network data transmission method using packet switching technology on the basis of the GSM network. The GPRS network is a bearer network modified on the GSM network, specifically a two-layer bearer network. In this sense, GPRS network is the same as Ethernet, token ring network, and frame relay network, and they are all used to carry three-layer data packets. The GPRS network is implemented based on the existing GSM network, and some network nodes need to be added to the existing GSM network. Among them, the GPRS Support Point (GSN) is the most important network node in the GPRS network. [0003] GSN has mobile routing management function, it can connect various types of data networks, and can connect GPRS network to GPRS register, GSN ...

AI Technical Summary

Problems solved by technology

[0029] 1) GGSN performs roaming restriction according to the IMSI and RAI carried in the GTP tunnel creation request message. Since the MCC and MNC carried in the IMSI identify a GPRS service area, the GGSN restricts roaming according to the IMSI carried in the GTP tunnel creation request message. To restrict MS roaming, only MSs in one GPRS service area can be restricted, but roaming restrictions cannot be performed for a certain MS user, which makes the processing of GGSN's roaming restrictions not perfect.

[0030] 2) In the processing of restricted roaming, GGSN needs to judge more conditions, which consumes GGSN resources and reduces the processing performance of GGSN

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