Invention Grant
- Patent Title: Circuit switched fallback for mobile terminated calls
- Patent Title (中): 移动终端呼叫的电路交换回退
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Application No.: US12865424Application Date: 2009-01-30
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Publication No.: US08706122B2Publication Date: 2014-04-22
- Inventor: Jari Tapio Vikberg , John Walter Diachina , Magnus Olsson , Peter Östrup
- Applicant: Jari Tapio Vikberg , John Walter Diachina , Magnus Olsson , Peter Östrup
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee Address: SE Stockholm
- International Application: PCT/IB2009/000163 WO 20090130
- International Announcement: WO2009/095777 WO 20090806
- Main IPC: H04W40/00
- IPC: H04W40/00 ; H04W36/00 ; H04W24/00

Abstract:
In order to prevent a mobile terminated (MT) call to a user equipment (UE) from being lost by addressing a Location Area/Tracking Area (LA/TA) mismatch problem that could occur during a circuit switched (CS) Fallback, the method comprises the steps of: receiving a paging message from a mobility management entity, MME, where the paging message identifies suitable location areas, the paging message is sent because a first mobile switching center, MSC1, received a MT call request for the UE; determining that there are no 2G/3G cells belonging to the suitable location areas based on a current location of the UE; identifying a target 2G/3G cell in a location area associated with the current location of the UE but not part of the 2G/3G cells belonging to the suitable location areas; and enabling a signaling connection to be established between the UE and the first MSC1 via a second mobile switching center, MSC2, where the second MSC2 interfaces with a base station controller, BSC2, or a radio network controller, RNC2, that manages the target 2G/3G cell, where the signaling connection allows the MT call to be established with the UE.
Public/Granted literature
- US20100331011A1 CIRCUIT SWITCHED FALLBACK FOR MOBILE TERMINATED CALLS Public/Granted day:2010-12-30
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