| 摘要 |
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. |
