| 摘要 |
A system and method for handing over a User Equipment (UE) from a Packet-Switched network to a Circuit-Switched network. A Generic Access Network Controller (GANC) receives a registration message from the UE with a temporary UE identity (GUTI) and uses the GUTI to identify a Mobility Management Entity (MME) controlling a connection with the UE. The GANC informs the MME whether the UE is registered to use Circuit Switched over Long Term Evolution (CS over LTE) signaling using a Generic Access Network (GAN). If so, the MME selectively directs to the GANC, handover signaling relating to the handover of the UE. If not, the MME selectively directs the handover signaling to a Mobile Switching Center (MSC). If the UE changes to a new MME, the new MME is informed whether the UE is registered to use CS over LTE using the GAN.
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