公开(公告)号：US11368894B2

公开(公告)日：2022-06-21

申请号：US16633527

申请日：2018-07-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bing Hui ,  Il Gyu Kim ,  Junhyeong Kim ,  Gosan Noh ,  Hee Sang Chung ,  Sung Woo Choi

IPC: H04B7/06 ,  H04W74/08 ,  H04W36/30 ,  H04W36/36 ,  H04W36/06

Abstract: Provided are a method and a device for triggering a beam failure recovery (BFR) procedure of a multibeam system by means of the steps of: detecting a beam failure by monitoring a wireless link connected with a base station; identifying a candidate transmission beam of the base station; and transmitting a BFR request to the base station when the candidate transmission beam of the base station is identified.

公开(公告)号：US10827530B2

公开(公告)日：2020-11-03

申请号：US15971301

申请日：2018-05-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bing Hui ,  Il Gyu Kim ,  Junhyeong Kim ,  Gosan Noh ,  Hee Sang Chung ,  Sung Woo Choi

IPC: H04W74/08 ,  H04B7/06 ,  H04W74/00 ,  H04B7/08

Abstract: A method for transmitting and receiving a message for a random access (RA) between user equipment (UE) and a base station in a multi beam system includes: transmitting a synchronization signal (SS) block including a synchronization signal by performing beam sweeping for a multi beam; receiving a message 1 of an RA procedure from the UE; determining an optimal transmission beam to be used to transmit a message 2 of the RA procedure based on information about an association mapping between the SS block and a physical random access channel (PRACH) which is used to transmit the message 1; and transmitting the message 2 by using the optimal transmission beam.

公开(公告)号：US10820355B2

公开(公告)日：2020-10-27

申请号：US15934320

申请日：2018-03-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bing Hui ,  Il Gyu Kim ,  Junhyeong Kim ,  Gosan Noh ,  Hee Sang Chung ,  Sung Woo Choi

IPC: H04W56/00 ,  H04W74/08 ,  H04W16/28 ,  H04B7/08 ,  H04B7/06 ,  H04L5/00

Abstract: A method and an apparatus for random access in a mobile communication system are provided. A terminal receives a synchronization signal block, obtains beam index information from the received synchronization signal block, and transmits a preamble message occupying a plurality of preamble resources including a preamble resource corresponding to the beam index information to a base station. A random access resource includes a plurality of preamble resources, and the synchronization signal block is specified for one beam and corresponds to one preamble resource of the random access resource.