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US 9,883,475 B2Granted
LTE network selection method, device, and system
AssigneeHuawei Technologies Co., Ltd.
InventorsXiaobo Wu, Yangming Lv, Guobao Xi
Life of this patent
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Abstract
The present invention discloses an LTE network selection method. In a process of implementing CSFB combined registration, an MME of a Long Term Evolution LTE network sends a location area identity LAI to UE, where the LAI includes a PLMN identity of the LTE network, so that after a circuit switched fallback-based voice session ends, the UE preferably returns to the LTE network according to the PLMN identity.
Claims18
An LTE network selection method, comprising:
- receiving, by a mobility management entity (MME) of a Long Term Evolution (LTE) network, a combined registration request message initiated by a user equipment (UE) that is located in the LTE network;
- and
- sending, by the MME, a combined registration accept message to the UE, wherein the combined registration accept message carries a first location area identity (LAI), public land mobile network (PLMN) information in the first LAI comprises a PLMN identity of the LTE network for enabling the UE to select the LTE network to return to according to the PLMN identity after the UE falls back from the LTE network to a circuit switched (CS) domain of a second generation (2G) or third generation (3G) network.
An LTE network selection method, comprising:
- receiving, by a control device, a location update request message sent by a mobility management entity (MME) of a Long Term Evolution (LTE) network, wherein the control device is a mobile switching center (MSC) or a visitor location register (VLR) of a second generation (2G) or third generation (3G) network;
- and
- sending, by the control device, a location update accept message to the MME, wherein the location update accept message carries a first location area identity (LAI), public land mobile network (PLMN) information in the first LAI comprises a PLMN identity of the LTE network but not a PLMN identity of the 2G or 3G network, the PLMN identity of the LTE network for enabling a user equipment (UE) to select the LTE network to return to according to the PLMN identity after the UE falls back from the LTE network to a circuit switched (CS) domain of a 2G or 3G network.
An LTE network selection method, comprising:
- sending, by a user equipment (UE) located in a Long Term Evolution (LTE) network, a combined registration request message to a mobility management entity (MME) of the LTE network;
- receiving, by the UE, a combined registration accept message sent by the MME, wherein the combined registration accept message carries a first location area identity (LAI), and public land mobile network (PLMN) information in the first LAI comprises a PLMN identity of the LTE network;
- and
- after the UE falls back from the LTE network to a circuit switched (CS) domain of a second generation (2G) or third generation (3G) network, selecting, by the UE according to the PLMN identity of the LTE network in the LAI, the LTE network to which the UE is to return.
1 more element
A mobility management entity (MME) of a Long Term Evolution (LTE) network, the MME comprising:
- computing hardware;
- and
- a non-transitory computer-readable storage medium including computer-executable instructions that, when executed by the computing hardware, cause the MME to:
- receive a combined registration request message initiated by a user equipment (UE) that is located in the LTE network, and
- send a combined registration accept message to the UE, wherein the combined registration accept message carries a first location area identity (LAI), public land mobile network (PLMN) information in the first LAI comprises a PLMN identity of the LTE network for enabling the UE to select the LTE network to return to according to the PLMN identity after the UE falls back from the LTE network to a circuit switched (CS) domain of a second generation (2G) or third generation (3G) network.
2 more elements
A control device of a second generation (2G) or third generation (3G) network, wherein the control device is a mobile switching center (MSC) or a visitor location register (VLR), the control device comprising:
- computing hardware;
- and
- a non-transitory computer-readable storage medium including computer-executable instructions that, when executed by the computing hardware, cause the control device to:
- receive a location update request message sent by a mobility management entity (MME) of a Long Term Evolution (LTE) network, and
- send a location update accept message to the MME, wherein the location update accept message carries a first location area identity (LAI), public land mobile network (PLMN) information in the first LAI comprises a PLMN identity of the LTE network but not a PLMN identity of the 2G or 3G network, the PLMN identity of the LTE network for enabling a user equipment (UE) to select the LTE network to return to according to the PLMN identity after the UE falls back from the LTE network to a circuit switched (CS) domain of a 2G or 3G network.
2 more elements
User equipment (UE) that is located in a Long Term Evolution (LTE) network, the UE comprising:
- a processor configured to cause the UE to:
- send a combined registration request message to a mobility management entity (MME) of the LTE network;
- receive a combined registration accept message sent by the MME, wherein the combined registration accept message carries a first location area identity (LAI), and public land mobile network (PLMN) information in the LAI comprises a PLMN identity of the LTE network;
- and
- after the UE falls back from the LTE network to a circuit switched (CS) domain of a second generation (2G) or third generation (3G) network, select, according to the PLMN identity of the LTE network in the LAI received by the UE, the LTE network to which the UE is to return.
2 more elements
Dependencies are inferred from the claim text.