US 12,267,871 B2
RACH procedure coverage enhancement and recovery
Seyed Ali Akbar Fakoorian, Cupertino, CA (US); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Cupertino, CA (US); Haitong Sun, Cupertino, CA (US); Hong He, Cupertino, CA (US); Oghenekome Oteri, San Diego, CA (US); Sigen Ye, Cupertino, CA (US); Wei Zeng, Cupertino, CA (US); Weidong Yang, San Diego, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/593,753
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed Oct. 9, 2020, PCT No. PCT/CN2020/119942
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2022/073188, PCT Pub. Date Apr. 14, 2022.
Prior Publication US 2022/0322447 A1, Oct. 6, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/006 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for wireless communications by a base station, comprising:
decoding a random access channel (RACH) preamble received from a user equipment (UE) via a physical random access channel (PRACH);
determining a number of repetitions for transmitting a random access response (RAR) over a physical downlink shared channel (PDSCH) in response to the RACH preamble; and
encoding a transmission for the UE to be sent over a physical downlink control channel (PDCCH), the transmission indicating the number of repetitions for transmitting the RAR to the UE using one or more reserved bits of a downlink control information (DCI) that schedules the repetitions for transmitting the RAR;
wherein indicating the number of repetitions using the one or more reserved bits of the DCI that schedules the repetitions for transmitting the RAR comprises:
indicating the number of repetitions in a system information block (SIB), and
mapping the one or more reserved bits of the DCI to the indicated number of repetitions in the SIB.