Invention Grant
- Patent Title: Circuit switch fallback (CSFB) during prepaging
- Patent Title (中): 电路切换回退(CSFB)
-
Application No.: US13413752Application Date: 2012-03-07
-
Publication No.: US08588772B2Publication Date: 2013-11-19
- Inventor: Lu Tian , Yong Zhao
- Applicant: Lu Tian , Yong Zhao
- Applicant Address: FR Paris
- Assignee: Alcatel Lucent
- Current Assignee: Alcatel Lucent
- Current Assignee Address: FR Paris
- Agency: Carmen Patti Law Group, LLC
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04M3/42 ; H04L12/26 ; H04L12/66

Abstract:
A method and apparatus for delivering a mobile terminated call to user equipment (UE) in a circuit switched fallback (CSFB) capable wireless network system using prepaging. When the VMSC registered in the HLR of the called UE receives a provide roaming number message from the HLR indicating that a CS call to the UE has been originated at a GMSC, the VMSC starts a paging process with a mobility management entity (MME) then returns a mobile station roaming number (MSRN) to the HLR when the called UE is in EMM-connected mode. Alternatively, the VMSC sets a guard timer and returns the MSRN to the HLR when the guard timer expires. In the meantime, the VMSC remain in a paging stage waiting for the response from the UE falling back to the UMTS/GSM network from the LTE network.
Public/Granted literature
- US20130237213A1 CIRCUIT SWITCH FALLBACK (CSFB) DURING PREPAGING Public/Granted day:2013-09-12
Information query