Method and device for acquiring information of 2G/3G location area under circuit switched fallback (CSFB)

Abstract

The invention discloses a method and device for acquiring information of a 2G/3G location area under circuit switched fallback (CSFB). The method comprises the following steps: when an SCP requests the location information of the called UE from a called MSC, the called MSC sends a paging request to an MME; the MME indicates the called UE to fall back to a 2G/3G network, and the called UE sends the location information to the called MSC; the called MSC transparently transmits the location information of the called UE to the SCP, and the SCP stores the location information of the called UE and indicates a calling MSC to continue calling; the calling MSC continues calling to obtain the routing information and roaming numbers of the called UE; and the called MSC receives an incoming call request of the calling MSC, and then indicates the called UE to fall back to the 2G/3G network, and also sends the paging request to the MME to put through the call.

Description

technical field [0001] The present invention relates to CSFB (Circuit Switched Fallback) technology in the field of mobile data, in particular to a method and device for acquiring 2G / 3G location area information under CSFB. Background technique [0002] CSFB voice service is a circuit domain fallback voice solution. When a user registers on the 4th generation (4G, 4Generation) mobile network—EPS, Evolved Packet System (EPS, Evolved Packet System) network to initiate or receive voice services, the EPS network instructs the user to fall back to the target circuit domain network before initiating or receiving voice services business. This voice solution is called Circuit Domain Fallback in Evolved Packet System (CSFBin EPS) scheme. [0003] In a 2G / 3G mobile network, when a user subscribes to an intelligent network service, such as a mobile virtual private network (VPMN, Virtual Private Mobile Network)—referred to as a V network, the service control point (SCP, Service Contro...

AI Technical Summary

Problems solved by technology

[0005] 1. The smart called party (CSFB user) cannot obtain 2G/3G location information through the 4G network

[0006] 2. The SCP in the intelligent network cannot obtain the user's location information, so services based on location information cannot be realized, such as billing in preferential areas, call restrictions in special areas, formulation of marketing packa...

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