US 12,075,482 B2
Provision of RACH related information for connection failure detection
Daewook Byun, Seoul (KR); Hongsuk Kim, Seoul (KR); Jian Xu, Seoul (KR); and Seokjung Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/425,170
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 31, 2020, PCT No. PCT/KR2020/001492
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/159286, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0013769 (KR), filed on Feb. 1, 2019.
Prior Publication US 2022/0124817 A1, Apr. 21, 2022
Int. Cl. H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/002 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method performed by a generation Node B (gNB) central unit (gNB-CU) operating in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE) via a gNB distributed unit (gNB-DU) a UE Information Request message;
receiving, from the UE via the gNB-DU, a UE Information Response message including (1) radio link failure (RLF) related information and (2) random access channel (RACH) related information,
wherein the RLF related information informs the gNB-CU that a RLF has occurred for the UE, and includes a cell identify (ID) of a cell at which the RLF occurred, and
wherein the RACH related information includes (1) information on variables for a random access procedure which the UE used and (2) information related to a number of transmitted preambles;
transmitting, to the gNB-DU, a message including (1) the RLF related information and (2) the RACH related information; and
receiving, from the gNB-DU, a RACH configuration which is based on the RACH related information.