Network Selection Method and Core Network Device

Patent metadata

Field	Value
Publication number	US-2016249278-A1
Application number	US-201615142167-A
Country	US
Kind code	A1
Filing date	Apr 29, 2016
Priority date	Nov 1, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

Embodiments relate to a network selection method and an apparatus. The method comprises: after receiving an access request message from a UE, a first core network device may send, to the UE, information about a dedicated second core network device corresponding to the UE, thereby ensuring that the UE can be attached to the dedicated second core network device according to the information about the dedicated second core network device, increasing selection accuracy when a core network device is selected for the user terminal, and avoiding occurrence of an access failure of the user terminal to the greatest extent.

First claim

What is claimed is:

1 . A network selection method, comprising:
receiving, by a first core network device, an access request message from a user equipment (UE); and sending, by the first core network device, a temporary identifier of the UE to the UE, wherein the temporary identifier of the UE comprises information about a dedicated second core network device that resides in a dedicated network and serves the UE.

2 . The method according to claim 1 , wherein the first core network device is a mobility management entity (MME).

3 . The method according to claim 1 , wherein the first core network device is a serving general packet radio service support node (SGSN).

4 . The method according to claim 1 , wherein the first core network device is a mobile switching center (MSC)/visitor location register (VLR).

5 . The method according to claim 1 , wherein the UE is configured to be served by a dedicated network, or a UE of a specific type, or a UE with specific subscription data.

6 . The method according to claim 5 , wherein the UE of the specific type is a machine type communication (MTC) UE or a low-priority UE.

7 . The method according to claim 5 , wherein the specific subscription data refers to subscription data that comprises a specific access point name (APN), or subscription data that comprises data of a type of a network serving the UE, or subscription data that comprises data indicating that the UE needs to be served by a specific network, or subscription data that comprises data of a type of a core network element serving the UE.

8 . The method according to claim 1 , wherein sending the temporary identifier comprises:
sending an access accept message to the UE, wherein the access accept message comprises the temporary identifier and further comprises a non-broadcast location area identifier or a value of a periodic location area update timer.

9 . The method according to claim 1 , further comprising: sending, by the first core network device, a detach request to the UE, wherein the detach request comprises a reattach cause value.

10 . The method according to claim 1 , wherein the information about the dedicated second core network device is: a group identifier of the dedicated second core network device, or a code of the dedicated second core network device, or a network resource identifier (NRI) of the dedicated second core network device.

11 . A core network device, comprising:
a memory, configured to store an instruction; an interface, configured to receive an access request message from a user equipment (UE); and a processor, when performing the instruction, configured to cause the interface to send a temporary identifier of the UE to the UE, wherein the temporary identifier of the UE comprises information about a dedicated second core network device that resides in a dedicated network and serves the UE.

12 . The device according to claim 11 , wherein the core network device is a mobility management entity (MME).

13 . The device according to claim 11 , wherein the core network device is a serving general packet radio service support node (SGSN).

14 . The device according to claim 11 , wherein the core network device is a mobile switching center (MSC)/visitor location register (VLR).

15 . The device according to claim 11 , wherein the UE is a UE configured to be served by a dedicated network, or a UE of a specific type, or a UE with specific subscription data.

16 . The device according to claim 15 , wherein the UE of the specific type is an MTC UE or a low-priority UE.

17 . The device according to claim 15 , wherein the specific subscription data refers to subscription data that comprises a specific access point name (APN), or subscription data that comprises data of a type of a network serving the UE, or subscription data that comprises data indicating that the UE needs to be served by a specific network, or subscription data that comprises data of a type of a core network element serving the UE.

18 . The device according to any claim 11 , wherein the interface is further configured to send an access accept message to the UE, wherein the access accept message comprises the temporary identifier and further comprises a non-broadcast location area identifier or a value of a periodic location area update timer.

19 . The device according to a claim 11 , wherein the interface is further configured to send a detach request to the UE, wherein the detach request comprises a reattach cause value.

20 . The device according to claim 11 , wherein the information about the dedicated second core network device is: a group identifier of the dedicated second core network device, or a code of the dedicated second core network device, or a network resource identifier (NRI) of the dedicated second core network device.

Assignees

• Huawei Tech Co Ltd

Inventors

• Qi Caixia
• Liu Wei
• Wang Shuo
• Zhang Yanping

Classifications

• H04W60/06

  De-registration or detaching · CPC title

• H04W8/06

  Registration at serving network Location Register, VLR or user mobility server · CPC title

• H04W8/08

  Mobility data transfer · CPC title

• H04W48/18 Primary

  Selecting a network or a communication service · CPC title

• H04W4/005

  Electricity · mapped topic