Title:
METHOD FOR SUPPORTING HANDOVER AND CORRESPONDING APPARATUS.
Document Type and Number:
WIPO Patent Application WO/2019/031941
Kind Code:
A1
Abstract:
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method of a base station for supporting an inter-system handover from an evolved packet system (EPS) system to a 5th generation (5G) system. The method comprises receiving, from an access and mobility management function (AMF), a handover request message including E-UTRAN radio access bearer (E-RAB) information and quality of service (Qos) flow information, identifying whether a protocol data unit (PDU) session is accepted or not, determining whether a data forwarding for at least one Qos flow associated with the PDU session is accepted or not based on the E-RAB information and the Qos flow information in case that the PDU session is accepted and transmitting, to the AMF, a handover request acknowledgement message including information on the at least one Qos flow based on the determination. The method solves the data forwarding problem during the movement of a UE between an LTE system and a 5G system, so that the loss of data is avoided and the continuity of services is ensured.
Inventors:
XU LIXIANG (CN)
WANG HONG (CN)
KE XIAOWAN (CN)
WANG WEIWEI (CN)
WANG HONG (CN)
KE XIAOWAN (CN)
WANG WEIWEI (CN)
Application Number:
PCT/KR2018/009248
Publication Date:
February 14, 2019
Filing Date:
August 13, 2018
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
BEIJING SAMSUNG TELECOMMUNICATIONS TECH RESEARCH CO LTD (CN)
BEIJING SAMSUNG TELECOMMUNICATIONS TECH RESEARCH CO LTD (CN)
International Classes:
H04W36/30; H04W28/02; H04W36/14
Foreign References:
| US20160021592A1 | 2016-01-21 |
Other References:
3GPP: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Procedures for the 5G System; Stage 2 (Release 15)", 3GPP TS 23.502 V0.5.0, 14 July 2017 (2017-07-14), XP055571044, Retrieved from the Internet
NTT DOCOMO: "23.502: handover from EPS to 5GS procedure using Nx interface", S2-174564 , SA WG2 MEETING #122, 20 June 2017 (2017-06-20), Cabo, Mexico, XP051309618, Retrieved from the Internet
CHINA TELECOM: "Update 5GS to EPS handover procedure", S2-175362 , SA WG2 MEETING #122-BIS, 9 August 2017 (2017-08-09), Sophia Antipolis, France, XP051312233, Retrieved from the Internet
HUAWEI: "Update of 4G to 5G interworking handover with Nx interface", S2-175158 , SA WG2 MEETING #122, 3 July 2017 (2017-07-03), San Jose del Cabo, Mexico, XP051310147, Retrieved from the Internet
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Procedures for the 5G System; Stage 2 (Release 15", 3GPP TS 23.502, 1 July 2017 (2017-07-01)
ANONYMOUS: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture for Next Generation System (Release 14", 3GPP STANDARD, vol. SA WG2, no. V14.0.0, 16 December 2016 (2016-12-16), pages 1 - 527, XP051295448
See also references of EP 3652993A4
NTT DOCOMO: "23.502: handover from EPS to 5GS procedure using Nx interface", S2-174564 , SA WG2 MEETING #122, 20 June 2017 (2017-06-20), Cabo, Mexico, XP051309618, Retrieved from the Internet
CHINA TELECOM: "Update 5GS to EPS handover procedure", S2-175362 , SA WG2 MEETING #122-BIS, 9 August 2017 (2017-08-09), Sophia Antipolis, France, XP051312233, Retrieved from the Internet
HUAWEI: "Update of 4G to 5G interworking handover with Nx interface", S2-175158 , SA WG2 MEETING #122, 3 July 2017 (2017-07-03), San Jose del Cabo, Mexico, XP051310147, Retrieved from the Internet
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Procedures for the 5G System; Stage 2 (Release 15", 3GPP TS 23.502, 1 July 2017 (2017-07-01)
ANONYMOUS: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture for Next Generation System (Release 14", 3GPP STANDARD, vol. SA WG2, no. V14.0.0, 16 December 2016 (2016-12-16), pages 1 - 527, XP051295448
See also references of EP 3652993A4
Attorney, Agent or Firm:
YOON & LEE INTERNATIONAL PATENT & LAW FIRM (KR)
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