Title:
METHOD AND APPARATUS FOR FAILURE RECOVERY IN WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/172964
Kind Code:
A1
Abstract:
The present disclosure relates to a failure recovery in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device served by a master node (MN) and a secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: receiving information for a timer related to a fast master cell group (MCG) recovery and a conditional mobility attempt configuration; starting the timer related to the fast MCG recovery upon detecting a MCG failure; and based on detecting an expiry of the timer related to the fast MCG recovery: removing one or more conditional mobility commands stored in the wireless device; and initiating a transmission of a radio resource control (RRC) re-establishment request message.
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Inventors:
KIM HONGSUK (KR)
JUNG SUNGHOON (KR)
HONG JONGWOO (KR)
JUNG SUNGHOON (KR)
HONG JONGWOO (KR)
Application Number:
PCT/KR2021/002531
Publication Date:
September 02, 2021
Filing Date:
March 02, 2021
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04W36/00; H04W36/30; H04W36/32; H04W76/18; H04W76/19
Domestic Patent References:
| WO2018182231A1 | 2018-10-04 |
Other References:
ZTE CORPORATION, SANECHIPS: "Discussion on fast RLF recovery when applying CHO and fast MCG recovery", 3GPP DRAFT; R2-1913484 DISCUSSION ON FAST RLF RECOVERY, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Chongqing, China; 20191014 - 20191018, 4 October 2019 (2019-10-04), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051791483
QUALCOMM INCORPORATED: "Remaining issues on conditional intra-SN PSCell change without MN involvement failure handling", 3GPP DRAFT; R2-2001150, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. 20200224 - 20200306, 14 February 2020 (2020-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051849518
SAMSUNG: "Remaining issues concerning conditional change (mostly PSCell)", 3GPP DRAFT; R2-2001163, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20200224 - 20200304, 14 February 2020 (2020-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051849524
NOKIA, NOKIA SHANGHAI BELL: "Summary of 6.9.3.2 Conditional Handover Failure Handling", 3GPP DRAFT; R2-2002016, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Elbonia; 20200224 - 20200306, 21 February 2020 (2020-02-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051850036
See also references of EP 4055886A4
QUALCOMM INCORPORATED: "Remaining issues on conditional intra-SN PSCell change without MN involvement failure handling", 3GPP DRAFT; R2-2001150, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. 20200224 - 20200306, 14 February 2020 (2020-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051849518
SAMSUNG: "Remaining issues concerning conditional change (mostly PSCell)", 3GPP DRAFT; R2-2001163, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20200224 - 20200304, 14 February 2020 (2020-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051849524
NOKIA, NOKIA SHANGHAI BELL: "Summary of 6.9.3.2 Conditional Handover Failure Handling", 3GPP DRAFT; R2-2002016, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Elbonia; 20200224 - 20200306, 21 February 2020 (2020-02-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051850036
See also references of EP 4055886A4
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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