Title:
METHOD AND APPARATUS FOR PRACH REPETITIONS
Document Type and Number:
WIPO Patent Application WO/2021/087978
Kind Code:
A1
Abstract:
Embodiments of the present application are related to a method and apparatus for physical random access channel (PRACH) repetitions. A method according to an embodiment of the present application includes: receiving signaling information for indicating a synchronization signal block (SSB) group size; mapping indices of a plurality of SSBs to a plurality of physical random access channel (PRACH) occasions for a number of PRACH repetitions, wherein the plurality of SSBs are divided into one or more SSB groups based on the indicated SSB group size; and determining a set of PRACH occasions corresponding to one of the indices of the plurality of SSBs from the plurality of PRACH occasions based on the mapping.
Inventors:
LIU HONGMEI (CN)
YAN ZHI (CN)
LI YINGYING (CN)
ZHANG YUANTAO (CN)
LEI HAIPENG (CN)
YAN ZHI (CN)
LI YINGYING (CN)
ZHANG YUANTAO (CN)
LEI HAIPENG (CN)
Application Number:
PCT/CN2019/116694
Publication Date:
May 14, 2021
Filing Date:
November 08, 2019
Export Citation:
Assignee:
LENOVO BEIJING LTD (CN)
International Classes:
H04W74/08
Foreign References:
| CN108419300A | 2018-08-17 | |||
| CN109729580A | 2019-05-07 | |||
| EP3471497A1 | 2019-04-17 | |||
| US20180324865A1 | 2018-11-08 | |||
| CN109041593A | 2018-12-18 |
Other References:
ZTE, SANECHIPS: "Remaining details of RACH procedure", 3GPP DRAFT; R1-1803610, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Sanya, China; 20180416 - 20180420, 15 April 2018 (2018-04-15), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051425907
SAMSUNG: "Enhancements to Initial Access Procedure for NR-U", 3GPP DRAFT; R1-1906921-ENHANCEMENTS TO INITIAL ACCESS PROCEDURE FOR NR-U, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051728371
PANASONIC: "NR-U PRACH resource enhancement", 3GPP DRAFT; R1-1904595_PRACHRESOURCE_PANASONIC, 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, 7 April 2019 (2019-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051699815
ERICSSON: "Preamble allocation when several SSBs are mapped to one RO", 3GPP DRAFT; R2-1810078 - PREAMBLE ALLOCATION WHEN SEVERAL SSBS ARE MAPPED TO ONE RO, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Montreal, Canada; 20180702 - 20180706, 1 July 2018 (2018-07-01), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051467303
PANASONIC: "NR-U PRACH resource enhancement", 3GPP DRAFT; R1-1904595
ZTE ET AL.: "Remaining issues of msgA channel structure", 3GPP DRAFT; R1-1910002
NOKIA ET AL.: "Summary of Remaining Details on RACH Procedure", 3GPP DRAFT; R1-1801097
See also references of EP 4055972A4
SAMSUNG: "Enhancements to Initial Access Procedure for NR-U", 3GPP DRAFT; R1-1906921-ENHANCEMENTS TO INITIAL ACCESS PROCEDURE FOR NR-U, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051728371
PANASONIC: "NR-U PRACH resource enhancement", 3GPP DRAFT; R1-1904595_PRACHRESOURCE_PANASONIC, 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, 7 April 2019 (2019-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051699815
ERICSSON: "Preamble allocation when several SSBs are mapped to one RO", 3GPP DRAFT; R2-1810078 - PREAMBLE ALLOCATION WHEN SEVERAL SSBS ARE MAPPED TO ONE RO, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Montreal, Canada; 20180702 - 20180706, 1 July 2018 (2018-07-01), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051467303
PANASONIC: "NR-U PRACH resource enhancement", 3GPP DRAFT; R1-1904595
ZTE ET AL.: "Remaining issues of msgA channel structure", 3GPP DRAFT; R1-1910002
NOKIA ET AL.: "Summary of Remaining Details on RACH Procedure", 3GPP DRAFT; R1-1801097
See also references of EP 4055972A4
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
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