METHOD FOR TRANSMITTING AND RECEIVING SIGNAL RELATED TO HANDOVER FROM 5GS TO EPS IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

Title:

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL RELATED TO HANDOVER FROM 5GS TO EPS IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/066544

Kind Code:

A1

Abstract:

An embodiment of the present invention relates to a method for an access and mobility management function (AMF) transmitting and receiving a signal related to a handover from 5GS to an evolved packet system (EPS) of a user equipment (UE) in a wireless communication system the method comprising a step in which the AMF receives a handover required message from a next-generation radio access network (NG-RAN); a step in which the AMF requests a session management (SM) context to a packet data network gateway+session management function (PGW + SMF); a step of receiving an SM context from the PGW + SMF; and a step in which the AMF transmits a handover command to the NG-RAN, wherein the SM context request is for a PDU session associated with 3GPP access among a plurality of protocol data unit (PDU) sessions.

More Like This:

WO/2013/154853	MEASUREMENT OF CELLS ARRANGED IN GROUPS OF DIFFERENT PRIORITIES
WO/2018/007214	SUPPORT OF PS DATA OFF IN A MOBILE SYSTEM
WO/2021/064494	METHODS OF CONFIGURING SSB/PCI FOR USE BY A UE AND RELATED USER EQUIPMENT AND NETWORK NODES

Inventors:

KIM LAEYOUNG (KR)
KIM HYUNSOOK (KR)
RYU JINSOOK (KR)
PARK SANGMIN (KR)
YOUN MYUNGJUNE (KR)

Application Number:

PCT/KR2018/011517

Publication Date:

April 04, 2019

Filing Date:

September 28, 2018

Export Citation:

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Assignee:

LG ELECTRONICS INC (KR)

International Classes:

H04W36/00; H04W36/14

Foreign References:

US8457635B2	2013-06-04
KR101274289B1	2013-06-13
KR101752073B1	2017-06-28

Other References:

CHINA TELECOM: "Update 5GS to EPS handover procedure", 3GPP DRAFT; S2-174257 , SA WG2 MEETING #122, 19 June 2017 (2017-06-19), San Jose del Cabo, Mexico, XP051309214
ERICSSON: "23.502: Handover between 3GPP and non-3GPP access", 3GPP DRAFT - S 2-171752 , SA WG2 MEETING #120, 21 March 2017 (2017-03-21), Busan, Korea, XP051257348
See also references of EP 3675557A4

Attorney, Agent or Firm:

KIM, Yong In et al. (KR)

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