公开(公告)号：US20220210838A1

公开(公告)日：2022-06-30

申请号：US17606988

申请日：2020-05-08

Applicant: Qualcomm Incorporated

Inventor： Jing LEI ,  Wanshi CHEN ,  Joseph Binamira SORIAGA ,  Peter GAAL ,  Rulming ZHENG ,  Lihhai HE ,  Seyong PARK ,  Naga BHUSHAN ,  Ozcan OZTURK

IPC: H04W74/08 ,  H04W24/08 ,  H04L5/00 ,  H04W74/00

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) receiving a configuration message from a base station for supporting random access channel (RACH) type selection by the UE. The configuration message may include one or more reference signals and one or more link quality thresholds corresponding to the one or more reference signals. The UE may generate measurements of the reference signals and determine link quality for communications between the UE and the base station based on the measurements. Based on a comparison between the link quality to corresponding link quality thresholds, the UE may select a two-step random access procedure, a four-step random access procedure, or both for establishing a connection with the base station. In some cases, the UE considers system loading information, transmission parameters, or random access rules in selecting the random access procedure.