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Title:
ENHANCEMENTS ON SYNCHRONIZATION, RANDOM ACCESS, AND HARQ OPERATION FOR NON-TERRESTRIAL NETWORKS
Document Type and Number:
WIPO Patent Application WO/2021/015595
Kind Code:
A1
Abstract:
A user equipment (UE), a base station, and a method for managing hybrid automatic repeat request (HARQ) feedback for downlink synchronization. The UE includes at least one transceiver configured to receive downlink control information (DCI) in a physical downlink control channel (PDCCH), and at least one processor operably connected to the at least one transceiver. The at least one processor is configured to determine, based on a first field in the DCI, whether a hybrid automatic repeat request (HARQ) feedback is disabled, and determine, if the HARQ feedback is disabled, a second field in the DCI to be one of a reserved field or a zero bitwidth field based on a format of the DCI.

Inventors:
SI HONGBO (US)
PAPASAKELLARIOU ARISTIDES (US)
Application Number:
PCT/KR2020/009814
Publication Date:
January 28, 2021
Filing Date:
July 24, 2020
Export Citation:
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Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
International Classes:
H04W72/12; H04J11/00; H04L1/18; H04L5/00; H04W48/10; H04W56/00; H04W84/06
Foreign References:
US20180159667A12018-06-07
US20180167171A12018-06-14
Other References:
MEDIATEK INC.: "Delay-tolerant re-transmission mechanisms in NR-NTN", 3GPP DRAFT; R1-1906466-MEDIATEK-DELAY-TOLERANT RE-TRANSMISSION MECHANISMS FOR NR-NTN, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, Nevada, USA; 20190513 - 20190517, R1-1906466-MediaTek-Delay-tolerant re-transmission, 2 May 2019 (2019-05-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051708501
QUALCOMM INCORPORATED: "Delay-Tolerant Retransmission Mechanisms for NTN", 3GPP DRAFT; R1-1905017 DELAY-TOLERANT RETRANSMISSION MECHANISMS FOR NTN, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Xi’an, China; 20190408 - 20190412, R1-1905017 Delay-tolerant retransmission mechanism, 30 March 2019 (2019-03-30), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051691940
NOMOR RESEARCH GMBH, THALES: "Considerations on MAC Control Loops and Timings in Non-Terrestrial Networks (NTN)", 3GPP DRAFT; R2-1813615_MAC_ANALYSIS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Chengdu, China; 20181008 - 20181012, R2-1813615_MAC_analysis, 25 September 2018 (2018-09-25), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051523114
Attorney, Agent or Firm:
YOON & LEE INTERNATIONAL PATENT & LAW FIRM (KR)
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