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1. WO2021030618 - FAILED RECEIVING OF TIMING ADVANCE (TA) COMMAND FOR RADIO RESOURCE CONTROL (RRC) CONNECTED USER EQUIPMENT (UE) IN TWO-STEP RANDOM ACCESS PROCEDURE

Publication Number WO/2021/030618
Publication Date 18.02.2021
International Application No. PCT/US2020/046228
International Filing Date 13.08.2020
IPC
H04W 56/00 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
H04W 74/00 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
H04W 74/08 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled access, e.g. random access, ALOHA or CSMA
H04W 76/19 2018.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
76Connection management
10Connection setup
19Connection re-establishment
CPC
H04W 56/0045
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
004compensating for timing error of reception due to propagation delay
0045compensating for timing error by altering transmission time
H04W 74/006
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
002Transmission of channel access control information
006in the downlink, i.e. towards the terminal
H04W 74/0833
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled ; or contention based; access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
0833using a random access procedure
H04W 76/19
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
76Connection management
10Connection setup
19Connection re-establishment
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
Inventors
  • ZHENG, Ruiming
  • HE, Linhai
  • OZTURK, Ozcan
  • LEI, Jing
  • HORN, Gavin Bernard
Agents
  • WEBB, Gregory P.
  • KELTON, Thomas W.
  • CHEN, Tom
  • MICHELSON, Gregory J.
  • HALLMAN, Jonathan
  • FOWLES, Adam
  • NGUYEN, Thuc B.
  • EDWARDS, Gary J.
  • LI, Eric
Priority Data
PCT/CN2019/10035313.08.2019CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FAILED RECEIVING OF TIMING ADVANCE (TA) COMMAND FOR RADIO RESOURCE CONTROL (RRC) CONNECTED USER EQUIPMENT (UE) IN TWO-STEP RANDOM ACCESS PROCEDURE
(FR) ÉCHEC DE RÉCEPTION D'UNE COMMANDE D'AVANCE TEMPORELLE (TA) POUR UN ÉQUIPEMENT D'UTILISATEUR (UE) CONNECTÉ À UN CONTRÔLE DE RESSOURCES RADIO (RRC) LORS D'UNE PROCÉDURE D'ACCÈS ALÉATOIRE EN DEUX ÉTAPES
Abstract
(EN)
Wireless communication devices, systems, and methods related to handling user equipment's (UE's) failure to receive a timing advance (TA) command from a base station during in a two-step random access procedure are provided. For example, a method of wireless communication can include transmitting a first random access channel (RACH) message (e.g.,msgA); monitoring for a second RACH message (e.g., msgB) from the BS including a timing advance (TA) command; performing a hybrid automatic repeat request (HARQ) procedure on the second RACH message; and performing, when the HARQ procedure on the second RACH message fails, at least one of: starting a new RACH procedure or triggering a radio link failure (RLF).
(FR)
L'invention concerne des dispositifs, des systèmes et des procédés de communication sans fil se rapportant à la gestion d'échecs d'équipement d'utilisateur (UE) pour recevoir une commande d'avance temporelle (TA) à partir d'une station de base lors d'une procédure d'accès aléatoire en deux étapes. Par exemple, un procédé de communication sans fil peut consister à transmettre un premier message de canal d'accès aléatoire (RACH) (par ex., msgA) ; à suivre un second message de RACH (par ex., msgB) à partir de la BS comprenant une commande d'avance temporelle (TA) ; à réaliser une procédure de demande de répétition automatique hybride (HARQ) sur le second message de RACH ; et à réaliser, lorsque la procédure de HARQ sur le second message de RACH échoue : le démarrage d'une nouvelle procédure de RACH et/ou le déclenchement d'un échec de liaison radio (RLF).
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