公开(公告)号：US20230413125A1

公开(公告)日：2023-12-21

申请号：US18248645

申请日：2020-12-14

Applicant: QUALCOMM Incorporated

Inventor： Chinmay Shankar VAZE ,  Chun-Hao HSU ,  Priyanka YENIGALLA ,  Vishnu Namboodiri KARAKKAD KESAVAN NAMBOODIRI ,  Zhanyi LIU ,  Jing LI ,  Rashmi Ranjan MOHANTY

IPC: H04W36/00

CPC classification number: H04W36/0022 ,  H04W36/0064

Abstract: Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may communicate with a first network device in a first communications system (e.g., a non-standalone (NSA) system) prior to initiating a handover to a second communications system (e.g., a standalone (SA) system). In some examples, the UE may receive a first tracking reference signal (TRS) from the first network device using a first transmission configuration indicator (TCI) state. The first network device may include an indication of the first TCI state in a control message. The UE may initiate a handover from the first network device to the second network device. Subsequent to the handover, the UE may receive a second TRS from the second network device. The UE may receive the second TRS using the first TCI state based on determining that one or more antenna port configuration conditions are satisfied.

公开(公告)号：US20220070807A1

公开(公告)日：2022-03-03

申请号：US17405824

申请日：2021-08-18

Applicant: QUALCOMM Incorporated

Inventor： Chinmay Shankar VAZE ,  Alexei Yurievitch Gorokhov ,  Yongle Wu ,  Paolo Minero ,  Hari Sankar ,  Ashok Mantravadi ,  Raghu Narayan Challa ,  Arvind Vardarajan Santhanam

IPC: H04W56/00 ,  H04L5/00 ,  H04W76/28

Abstract: A device may selectively listen for a tracking reference signal (TRS) during connected mode discontinuous reception (CDRx) based on whether the device is to switch between repeaters of a base station (such as during travel). A device may determine whether the device is in a high speed train (HST) scenario (such as based on a difference in frequency errors generated using a synchronization signal block (SSB) and generated using a TRS, based on a trajectory of a frequency error or a frequency error difference over time, based on instantaneous frequency errors, etc.). When the device is in a HST scenario, the device listens for a TRS during CDRx, and the device generates a frequency error using the TRS. When the device is not in a HST scenario, the device prevents listening for a TRS during CDRx (with a SSB received during CDRx to be used to generate a frequency error).

公开(公告)号：US20240049095A1

公开(公告)日：2024-02-08

申请号：US18258933

申请日：2021-03-05

Applicant: QUALCOMM Incorporated

Inventor： Zhanyi LIU ,  Ling XIE ,  Chinmay Shankar VAZE ,  Xuqiang ZHANG

IPC: H04W36/32

CPC classification number: H04W36/32

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) using information identified via radio access technology (RAT) (e.g., Long Term Evolution (LTE)) to support communications in another RAT (e.g., New Radio (NR)). For example, the UE may receive, from a first base station operating according to a first radio access technology an indication of a high speed associated with a first wireless connection of the UE with the first base station. The UE may perform a channel estimation procedure for the first wireless connection to generate a Doppler value based on receiving the indication. The UE may apply the generated Doppler value to a frequency tracking loop or a time tracking loop for communications with a second base station via a second wireless connection, wherein the second base station is operating according to a second RAT.

公开(公告)号：US20210168701A1

公开(公告)日：2021-06-03

申请号：US17105430

申请日：2020-11-25

Applicant: QUALCOMM Incorporated

Inventor： Yongle WU ,  Satashu GOEL ,  Arvind Vardarajan SANTHANAM ,  Chinmay Shankar VAZE ,  Alexei Yurievitch GOROKHOV ,  Brian Clarke BANISTER ,  Daniel AMERGA ,  Huan XU

IPC: H04W48/16 ,  H04B17/336

Abstract: A cell acquisition technique for 5G and other RATs is provided in which shallow scans are interleaved with deep scans. In each shallow scan, a UE determines whether a synchronization signal is received with sufficient signal quality over one period for the synchronization signal. In each deep scan, the UE determines whether the synchronization signal is received with sufficient signal quality over multiple periods for the synchronization signal.