公开(公告)号：US20240172295A1

公开(公告)日：2024-05-23

申请号：US18548869

申请日：2021-05-29

Applicant: QUALCOMM Incorporated

Inventor： Yuyu YAN ,  Liang HONG ,  Jie MAO ,  Levent AYDIN ,  Erman KOKEN ,  yongle WU ,  Rebecca Wen-Ling YUAN ,  Ziad AHMAD ,  Brian Clarke BANISTER ,  Ashok MANTRAVADI ,  Nanrun WU ,  Xinyu WANG ,  Jie ZHU

IPC: H04W74/0833 ,  H04B17/318 ,  H04W74/08

CPC classification number: H04W74/0833 ,  H04B17/328 ,  H04W74/0866

Abstract: Aspects are provided which allow a UE to apply CFO compensation to resolve mismatched RAPIDs caused by uplink Doppler shifts in HST deployments. The UE obtains one or more RARs each including a RAPID, where each of the RARs is responsive to a random access message including a preamble. The UE determines, in each of a threshold number of the one or more RARs, that the RAPID of a corresponding RAR is different than the preamble of a corresponding random access message. The UE then offsets a carrier frequency for each of one or more subsequent random access messages in response to the determination. As a result, mismatched RAPIDs due to uplink Doppler shifts may be avoided and RACH success rates may thereby be improved.