公开(公告)号：US20240187899A1

公开(公告)日：2024-06-06

申请号：US18554188

申请日：2021-06-21

Applicant: QUALCOMM Incorporated

Inventor： Yiqing CAO ,  Peter GAAL ,  Liangping MA ,  Xiao Feng WANG ,  Alberto RICO ALVARINO ,  Bin HAN ,  Ting WANG ,  Yan LI ,  Zhimin DU

IPC: H04W24/08 ,  H04B7/06 ,  H04L5/00 ,  H04W56/00

CPC classification number: H04W24/08 ,  H04B7/0626 ,  H04L5/0051 ,  H04W56/0015

Abstract: Aspects are provided which improve RLM by allowing a UE to apply a longer monitoring window for out-of-sync determinations before the UE triggers an RLM timer for in-sync determinations. The UE first obtains a reference signal from a base station. The UE then determines multiple groups of consecutive out-of-sync indications in response to the reference signal. For example, the UE may perform looped out-of-sync monitoring, multi-cell or carrier monitoring, or a combination of such monitoring to determine the multiple groups of out-of-sync indications. Afterwards, the UE triggers the RLM timer in response to determining the multiple groups of consecutive out-of-sync indications. As a result, the UE may perform additional out-of-sync monitoring during RLM before proceeding with in-sync monitoring, thus allowing the UE to account for rapid BLER changes (ping-pong effects) that may occur in HAPS systems due to tropospheric turbulence and enabling more accurate RLM determinations and minimal RLF detections.

公开(公告)号：US20240137958A1

公开(公告)日：2024-04-25

申请号：US18546579

申请日：2021-04-28

Applicant: QUALCOMM Incorporated

Inventor： Yiqing CAO ,  Peter GAAL ,  Timo Ville VINTOLA ,  Alberto RICO ALVARINO ,  Kazuki TAKEDA ,  Wanshi CHEN ,  Bin HAN ,  Yan LI ,  Zhimin DU

IPC: H04W72/51 ,  H04L5/00 ,  H04W8/24

CPC classification number: H04W72/51 ,  H04L5/0078 ,  H04W8/24

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a user equipment (UE) may support two or more uplink switching periods for transmit chain switching. The UE may transmit a UE capability message indicating the UE capability to support a first uplink switching period and a second uplink switching period for transmit chain switching. The first uplink switching period and the second uplink switching period may each correspond to different switching periods associated with configuration switches between different transmit chain configurations of the UE. The UE and a base station may select an uplink switching period from among the first uplink switching period and the second uplink switching period. The UE may transmit an uplink data message to the base station after a preparation time that is based on the uplink switching period.

公开(公告)号：US20230171009A1

公开(公告)日：2023-06-01

申请号：US17754815

申请日：2019-11-06

Applicant: QUALCOMM Incorporated

Inventor： Bin HAN ,  Valentin Alexandru GHEORGHIU ,  Lu GAO ,  Yiqing CAO

IPC: H04B17/318 ,  H04L5/00 ,  H04W24/10

CPC classification number: H04B17/318 ,  H04L5/0051 ,  H04W24/10

Abstract: Wireless communications systems and methods related to over-the-air (OTA) channel equalization in millimeter wave mmWave) testing are provided. An apparatus transmits, to a wireless communication device positioned within an over-the-air (OTA) space, one or more reference signals. The apparatus receives, from the wireless communication device, channel state information in response to the one or more reference signals. The apparatus determines a channel estimate for the OTA space based on the received channel state information. The apparatus transmits, to the wireless communication device, a communication signal based on a reference channel and the channel estimate for the OTA space.

公开(公告)号：US20230044975A1

公开(公告)日：2023-02-09

申请号：US17791615

申请日：2021-01-09

Applicant: QUALCOMM Incorporated

Inventor： Yiqing CAO ,  Yan LI ,  Ling XIE ,  Jie MAO ,  Kepei TANG ,  Bin HAN

IPC: H04W56/00 ,  H04L5/14

Abstract: Techniques and apparatus for achieving multi-cell synchronization for dual connectivity and carrier aggregation are described. In one technique, a timing difference between a first base station (BS) and a second BS is determined, where the first BS is in an asynchronous timing configuration with respect to the second BS. A measurement configuration for measuring signal(s) from the second BS is determined, based on the timing difference. The measurement configuration is signaled to a user equipment (UE) served by the first BS. The UE performs a measurement procedure for the signal(s) in accordance with the measurement configuration. In another technique, the second BS receives a synchronization request, which includes a first time stamp, from the first BS via a network interface between the first BS and the second BS. The second BS sends a synchronization response, which includes a second time stamp, to the first BS.

公开(公告)号：US20220312500A1

公开(公告)日：2022-09-29

申请号：US17594847

申请日：2020-04-28

Applicant: QUALCOMM Incorporated

Inventor： Yiqing CAO ,  Xiao Feng WANG ,  Wanshi CHEN ,  Jing LEI ,  Huilin XU ,  Peter GAAL ,  Juan MONTOJO ,  Yan LI ,  Bin HAN

IPC: H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04L1/00

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a phase tracking reference signal (PTRS) configuration for a random access channel (RACH) procedure, wherein the PTRS configuration indicates a PTRS density per modulation and coding scheme (MCS). The UE may perform the RACH procedure according to the PTRS configuration and an MCS used for the RACH procedure. Numerous other aspects are provided.