Method for supporting NAS signaling by base station in wireless communication system and apparatus therefor

Patent metadata

Field	Value
Publication number	US-10652812-B2
Application number	US-201716064835-A
Country	US
Kind code	B2
Filing date	Jul 3, 2017
Priority date	Jul 4, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

An embodiment of the present invention provides a method for supporting non-access stratum (NAS) signaling of a user equipment (UE) by a base station in a wireless communication system, the method comprising the steps of: transmitting, to the UE, information for supporting a connection to a next generation (NG) core; receiving a NAS-related message from the UE; performing one of MME selection and AMF selection according to whether the NAS-related message includes information regarding the use of NAS; and transmitting an NAS message to an MMF or an AMF which is determined as a result of performing one of the MME selection and the AMF selection.

First claim

The invention claimed is:

1. A method for supporting non-access stratum (NAS) signaling of a user equipment (UE) by a base station in a wireless communication system, the method comprising the steps of:
transmitting, by the base station, information that informs the UE that the base station supports a connection to a next generation (NG) core;
receiving, by the base station, a NAS-related message from the UE;
determining whether the NAS-related message includes NAS usage related information for 5G core connectivity; and
transmitting a NAS message to an access and mobility management function (AMF) when it is determined that the NAS-related message includes NAS usage related information.

2. The method according to claim 1 , wherein the NAS usage related information indicates that NG NAS is used and an evolved packet core (EPC) NAS is not used.

3. The method according to claim 1 further comprising:
when it is determined that the NAS-related message includes NAS usage related information, selecting a function of the NG core other than the AMF as a serving node of the UE, selecting the AMF as a serving node of the UE, transmitting the NAS message to the function of the NG core, transmitting the NAS message through an N2 interface and transmitting the NAS message through an interface connected to the AMF.

4. The method according to claim 1 further comprising:
when it is determined that the NAS-related message does not include NAS usage related information, selecting a node of an evolved packet core (EPC) other than a mobility management entity (MME) as a serving node of the UE, selecting the MME as a serving node of the UE, transmitting the NAS message to the MME, and transmitting the NAS message through an N1 interface.

5. The method according to claim 1 , wherein the base station transmits the NAS message to a mobility management entity (MME) when the NAS-related message does not include NAS usage related information.

6. The method according to claim 1 , wherein the base station is connected to both of an evolved packet Core (EPC) and NG core.

7. The method according to claim 1 , wherein the UE supports NG NAS.

8. The method according to claim 1 , wherein the NAS-related message is RRC (Radio Resource Control) message.

9. The method according to claim 8 , wherein the NAS-related message is a message which includes one or more of the NAS usage related information and the NAS message.

10. A base station supporting non-access stratum (NAS) signaling of a UE in a wireless communication system, the base station comprising:
a transceiver; and
a processor, operatively coupled to the transceiver, configured to:
control the transceiver to transmit, to the UE, information that informs the UE that the base station supports a connection to a next generation (NG) core,
controls the transceiver to receive a NAS-related message from the UE,
determines whether the NAS-related message includes NAS usage related information for 5G core connectivity, and
controls the transceiver to transmit a NAS message to an access and mobility management function (AMF) when it determines that the NAS-related message includes NAS usage related information.

11. The base station according to claim 10 , wherein the NAS usage related information indicates that NG NAS is used and an evolved packet core (EPC) NAS is not used.

12. The method according to claim 8 , wherein the NAS-related message does not include an NG NAS message.

Assignees

• Lg Electronics Inc

Inventors

• Kim Laeyoung
• Kim Hyunsook
• Ryu Jinsook
• Park Sangmin

Classifications

• H04W48/18 Primary

  Selecting a network or a communication service · CPC title

• H04W48/08 Primary

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W88/10

  adapted for operation in multiple networks, e.g. multi-mode access points · CPC title

• H04W48/14 Primary

  using user query {or user detection} · CPC title