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1. (WO2014198047) METHOD, DEVICE, AND SYSTEM FOR NETWORK HANDOVER

Pub. No.:    WO/2014/198047    International Application No.:    PCT/CN2013/077196
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Fri Jun 14 01:59:59 CEST 2013
IPC: H04W 36/14
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: WU, Xiaobo
吴晓波
ZOU, Ye
邹烨
ZHANG, Daliang
张达亮
ZHANG, Liwen
张立文
Title: METHOD, DEVICE, AND SYSTEM FOR NETWORK HANDOVER
Abstract:
Disclosed is a method for network handover. When a request message requesting for circuit-switched fallback (CSFB) is initiated by a UE located in an LTE network, an MME instructs an eNB to move the UE from the LTE network to a 2G or 3G network, and requests an MSC to hand over the UE from the LTE network to a CS domain of the 2G or 3G network. For a UE that does not support handover from an LTE network to a 2G or 3G network, when the UE is redirected from the LTE network to the 2G or 3G network, this allows for a network-triggered handover from the LTE network to the CS domain of the 2G or 3G network, thus allowing the network to prepare in advance a voice resource of the CS domain, and reducing the length of a voice call.