(19)
(11) EP 3 986 078 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
26.03.2025 Bulletin 2025/13

(45) Mention of the grant of the patent:
19.02.2025 Bulletin 2025/08

(21) Application number: 20840280.0

(22) Date of filing: 02.07.2020
(51) International Patent Classification (IPC): 
H04W 74/08(2024.01)
H04W 74/0833(2024.01)
(52) Cooperative Patent Classification (CPC):
H04W 74/0833; H04W 74/0836
(86) International application number:
PCT/CN2020/100005
(87) International publication number:
WO 2021/008382 (21.01.2021 Gazette 2021/03)

(54)

METHOD FOR RANDOM ACCESS PROCEDURE FALLBACK, USER EQUIPMENT, NETWORK DEVICE AND COMPUTER-READABLE STORAGE MEDIUM

VERFAHREN ZUM ZURÜCKGREIFEN DES RANDOM-ACCESS-ZUGRIFFSVERFAHRENS, BENUTZERGERÄT, NETZWERKVORRICHTUNG UND COMPUTERLESBARES SPEICHERMEDIUM

METHODE DE REPLI DE PROCEDURE D'ACCES ALÉATOIRE, EQUIPEMENT D'UTILISATEUR, DISPOSITIF DE RESEAU ET SUPPORT DE STOCKAGE LISIBLE PAR ORDINATEUR


(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 12.07.2019 CN 201910631589

(43) Date of publication of application:
20.04.2022 Bulletin 2022/16

(73) Proprietor: Vivo Mobile Communication Co., Ltd.
Dongguan, Guangdong 523860 (CN)

(72) Inventors:
  • BAO, Wei
    Dongguan, Guangdong 523860 (CN)
  • MO, Yitao
    Dongguan, Guangdong 523860 (CN)
  • WU, Yumin
    Dongguan, Guangdong 523860 (CN)

(74) Representative: Winter, Brandl - Partnerschaft mbB 
Alois-Steinecker-Straße 22
85354 Freising
85354 Freising (DE)


(56) References cited: : 
WO-A1-2018/075534
WO-A1-2019/134566
CN-A- 108 271 275
US-A1- 2018 103 465
WO-A1-2018/075534
CN-A- 106 714 315
CN-A- 108 271 275
US-A1- 2020 374 966
   
  • SONY: "Consideration on fall back procedure from 2-step RACH to 4-step RACH", vol. RAN WG2, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051730496, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN2/Docs/R2%2D1907046%2Ezip> [retrieved on 20190513]
  • OPPO: "Fall back mechanisms for 2-steps RACH", vol. RAN WG2, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051729102, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN2/Docs/R2%2D1905599%2Ezip> [retrieved on 20190513]
  • CMCC: "Fallback from 2-step to 4-step RA", vol. RAN WG2, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051729416, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN2/Docs/R2%2D1905923%2Ezip> [retrieved on 20190513]
  • VIVO: "Selection Between 2-step and 4-step RACH", vol. RAN WG2, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051729156, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN2/Docs/R2%2D1905653%2Ezip> [retrieved on 20190513]
  • HUAWEI ET AL: "Discussion on 2-step RACH procedure", vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051727508, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1906051%2Ezip> [retrieved on 20190513]
  • SONY,: "Consideration on fall back procedure from 2-step RACH to 4-step RACH,", 3GPP TSG RAN WG2 MEETING #106, R2-1907046, 17 May 2019 (2019-05-17), XP051711343
  • SONY,: "Consideration on fall back procedure from 2-step RACH to 4-step RACH,", 3GPP TSG RAN WG2 MEETING #106, R2-1907046, 17 May 2019 (2019-05-17), XP051711343
  • MEDIATEK INC.: "EDT RACH Fallback,", 3GPP TSG-RAN WG2 MEETING #101, R2-1802611,, 2 March 2018 (2018-03-02), XP051399873
  • MEDIATEK INC.: "MediaTek view on Release 17 RAN,", 3GPP TSG RAN#84, RP-191095,, 6 June 2019 (2019-06-06), XP051739381
  • MEDIATEK INC.: "EDT RACH Fallback,", 3GPP TSG-RAN WG2 MEETING #101, R2-1802611,, 2 March 2018 (2018-03-02), XP051399873
   
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