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公开(公告)号：US10257751B2
公开(公告)日：2019-04-09
申请号：US15316059
申请日：2014-07-22
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yinqing Jiang , Xiaoyan Chen , Xiaojian Liu , Li Shen
Abstract: Embodiments of the present invention relate to the field of wireless communications technologies, and provide a switching method. The method specifically includes: when user equipment is in idle mode, acquiring a 2G/3G base station candidate set; when initiating a voice service, sending a CSFB request message to an LTE base station; receiving a standard and a frequency of a target 2G/3G base station that are sent by the LTE base station to the user equipment; determining, according to the standard and the frequency of the target 2G/3G base station, whether the 2G/3G base station candidate set includes the target 2G/3G base station; and if the 2G/3G base station candidate set includes the target 2G/3G base station, switching, from the LTE base station to the target 2G/3G base station according to the standard and the frequency of the target 2G/3G base station.
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公开(公告)号：US20170127371A1
公开(公告)日：2017-05-04
申请号：US15310741
申请日：2014-05-12
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yinqing Jiang , Hui Jin , Xiaoyan Chen , Xiaojian Liu , Lin Shu , Li Shen
IPC: H04W60/04 , H04W8/18 , H04B1/3816 , H04W8/06
CPC classification number: H04W60/04 , H04B1/3816 , H04W8/06 , H04W8/183
Abstract: A method can be implemented by a user equipment to update RPLMN information. A PLMN identifier is selected from an available PLMN identifier set that includes PLMN identifiers with RPLMN information, HPLMN information, UPLMN information, and OPLMN information separately. A location update request message that carries the PLMN identifier is sent to a mobile switching center. A TMSI reallocation command is acquired from the mobile switching center according to the location update request message. It is determined whether location update acceptance information that is returned by the mobile switching center according to the location update request message is currently acquired. An operation of updating the PLMN identifier to registered public land mobile network RPLMN information is performed when the location update acceptance information is acquired and the operation of updating the PLMN identifier to RPLMN information is skipped when the location update acceptance information is not acquired.
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公开(公告)号：US09992760B2
公开(公告)日：2018-06-05
申请号：US15310741
申请日：2014-05-12
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yinqing Jiang , Hui Jin , Xiaoyan Chen , Xiaojian Liu , Lin Shu , Li Shen
IPC: H04W4/00 , H04W60/04 , H04W8/06 , H04W8/18 , H04B1/3816
CPC classification number: H04W60/04 , H04B1/3816 , H04W8/06 , H04W8/183
Abstract: A method can be implemented by a user equipment to update RPLMN information. A PLMN identifier is selected from an available PLMN identifier set that includes PLMN identifiers with RPLMN information, HPLMN information, UPLMN information, and OPLMN information separately. A location update request message that carries the PLMN identifier is sent to a mobile switching center. A TMSI reallocation command is acquired from the mobile switching center according to the location update request message. It is determined whether location update acceptance information that is returned by the mobile switching center according to the location update request message is currently acquired. An operation of updating the PLMN identifier to registered public land mobile network RPLMN information is performed when the location update acceptance information is acquired and the operation of updating the PLMN identifier to RPLMN information is skipped when the location update acceptance information is not acquired.
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