公开(公告)号：US20200214042A1

公开(公告)日：2020-07-02

申请号：US16631402

申请日：2018-07-25

Applicant: Sumeeth NAGARAJA ,  Muhammad Nazmul ISLAM ,  Sundar SUBRAMANIAN ,  Tao LUO ,  Peng CHENG ,  QUALCOMM Incorporated

Inventor： Sumeeth NAGARAJA ,  Muhammad Nazmul ISLAM ,  Sundar SUBRAMANIAN ,  Tao LUO ,  Peng CHENG

IPC: H04W74/08 ,  H04W74/02 ,  H04W76/19 ,  H04W36/08 ,  H04W16/28 ,  H04B7/06

Abstract: A user equipment (UE) may initiate a random access (RACH) procedure using an uplink resource selected based on a corresponding received synchronization signal block. The UE may detect a random access procedure trigger. The UE may configure a selection threshold time. The selection threshold time may be based at least in part on a latency requirement of the UE. The UE may select a synchronization signal block having a corresponding uplink resource within the selection threshold time. The synchronization signal block and corresponding uplink resource satisfy one or more parameters or conditions. The UE may transmit a random access preamble on the corresponding uplink resource.

公开(公告)号：US20200267770A1

公开(公告)日：2020-08-20

申请号：US16634563

申请日：2018-07-10

Applicant: Muhammad Nazmul ISLAM ,  Tao LUO ,  Sumeeth NAGARAJA ,  Peng CHENG ,  Sundar SUBRAMANIAN ,  Keiichi KUBOTA ,  Qualcomm Incorporated

Inventor： Muhammad Nazmul ISLAM ,  Tao LUO ,  Sumeeth NAGARAJA ,  Peng CHENG ,  Sundar SUBRAMANIAN ,  Keiichi KUBOTA

IPC: H04W74/08 ,  H04W72/04 ,  H04W76/27 ,  H04W36/08

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless systems, a user equipment (UE) may access a network or cell using a random access (RACH) procedure. A base station may allocate dedicated RACH resources and common RACH resources for the UE to transmit a RACH preamble message on and may convey a configuration for the UE. In some cases, the UE may perform multiple transmissions of the RACH preamble message in the dedicated RACH resources, and based on the configuration may determine whether to perform a single or multiple transmissions of the RACH preamble message in the common RACH resources. The UE may transmit the messages using the same or different uplink transmit beams, and the base station may receive the messages using the same or different uplink reception beams. These multiple transmissions may reduce latency and improve reliability of the RACH procedure.