US 12,245,092 B2
Communications network switching method, terminal device, and medium
Dajie Jiang, Guangdong (CN); and Xiaodong Yang, Guangdong (CN)
Assigned to VIVO MOBILE COMMUNICATION CO., LTD., Guangdong (CN)
Filed by VIVO MOBILE COMMUNICATION CO., LTD., Guangdong (CN)
Filed on Jan. 27, 2022, as Appl. No. 17/586,271.
Application 17/586,271 is a continuation of application No. PCT/CN2020/102987, filed on Jul. 20, 2020.
Claims priority of application No. 201910722888.2 (CN), filed on Aug. 6, 2019.
Prior Publication US 2022/0150788 A1, May 12, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 36/14 (2009.01); H04W 36/30 (2009.01); H04W 36/36 (2009.01)
CPC H04W 36/0085 (2018.08) [H04W 36/14 (2013.01); H04W 36/302 (2023.05); H04W 36/00838 (2023.05); H04W 36/362 (2023.05)] 20 Claims
OG exemplary drawing
 
1. A communications network switching method, applied to a terminal device in which at least two subscriber identity modules (SIMs) are installed, wherein the method comprises:
detecting whether a first SIM of the at least two SIMs meets a first trigger condition; and
performing communication processing based on a second SIM of the at least two SIMs if the first SIM meets the first trigger condition; wherein
the terminal device is in a radio resource control (RRC) connected state in a communications network to which the first SIM belongs; and the first trigger condition comprises at least one of:
that an intra-frequency cell handover procedure initiated by the terminal device with respect to the communications network to which the first SIM belongs meets a first condition; or
that an inter-frequency cell handover procedure initiated by the terminal device with respect to the communications network to which the first SIM belongs meets a second condition;
wherein the first condition comprises at least one of: handover failure; or handover success, but a signal quality of a target cell corresponding to intra-frequency cell handover is lower than a second preset signal quality; and
the second condition comprises at least one of: handover failure; or handover success, but a signal quality of a target cell corresponding to inter-frequency cell handover is lower than a third preset signal quality;
or
the terminal device is in an RRC idle state or an RRC inactive state in a communications network to which the first SIM belongs; and the first trigger condition comprises at least one of:
that an intra-frequency cell reselection procedure initiated by the terminal device with respect to the communications network to which the first SIM belongs meets a fourth condition; or
that an inter-frequency cell reselection procedure initiated by the terminal device with respect to the communications network to which the first SIM belongs meets a fifth condition;
wherein the fourth condition comprises at least one of: reselection failure; or reselection success, but a signal quality of a target cell corresponding to intra-frequency cell reselection is lower than a fifth preset signal quality; and
the fifth condition comprises at least one of: reselection failure; or reselection success, but a signal quality of a target cell corresponding to inter-frequency cell reselection is lower than a sixth preset signal quality.