公开(公告)号：US20200228212A1

公开(公告)日：2020-07-16

申请号：US16735051

申请日：2020-01-06

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Tingfang Ji ,  Alexandros Manolakos ,  Wanshi Chen

IPC: H04B17/345 ,  H04L5/14 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may identify a time division duplexing (TDD) configuration, where the TDD configuration includes a symbol pattern for a slot. A network may determine an overlap between a downlink symbol or a flexible symbol and an uplink symbol during symbols of the slot based on a second TDD configuration of a second UE, resulting in a cross-link interference (CLI). The second UE may measure the CLI based on implicit or explicit configurations that enable the measurement. Additionally or alternatively, the second UE may measure the CLI based on uplink signaling used for measuring the CLI, including dedicated signaling used for measuring CLI. In some cases, the uplink signaling may include uplink data, CLI reference signals, or random data.

公开(公告)号：US20200107227A1

公开(公告)日：2020-04-02

申请号：US16573093

申请日：2019-09-17

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Wanshi Chen ,  Yi Huang

IPC: H04W28/16 ,  H04L5/14 ,  H04B17/345

Abstract: Methods, systems, and devices for wireless communications are described. A core network may organize a set of base stations into a set of cell groups, each cell group including one or more base stations, the cell groups being organized based on potential of each base station to cause interference, by downlink transmission, to reception of uplink transmissions at remote base stations. The core network may identify cell group identifications for each cell group and configure the set of base stations with respective cell group identifications so that signals transmitted from individual base stations of each cell group include the respective cell group identification, and so that remote base stations whose uplink transmissions are interfered with can identify the cell group of base stations causing the interference. The number of base stations in a cell group may be iteratively reduced based on identifying the interference.

公开(公告)号：US20200053758A1

公开(公告)日：2020-02-13

申请号：US16537422

申请日：2019-08-09

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Peter Gaal ,  Huilin Xu ,  Wanshi Chen ,  Tao Luo

IPC: H04W72/12 ,  H04W72/04 ,  H04L5/10 ,  H04L5/00 ,  H04W72/14

Abstract: Rate-matching and channel estimation are disclosed for new radio (NR) user equipments (UEs). An NR UE obtains coexistence information of neighboring legacy operations including common reference signal (CRS) ports, CRS frequency pattern, and a legacy subframe type corresponding to the NR transmission segments. The NR UE determines legacy CRS occasion(s) coinciding with shared downlink direction operations for the NR and legacy operations, and rate-matches reception of NR downlink transmissions around the CRS occasion(s). In other aspects, an NR UE detects overlap of a downlink signal with downlink control channel candidate of a configured control resource set (CORESET). The UE ends monitoring of the candidate within a search space of the CORESET in response to the detected overlap, detects a collision between a scheduled demodulation reference signal (DMRS) and the downlink signal occasion, and discards all or part of the CORESET.

公开(公告)号：US20200029305A1

公开(公告)日：2020-01-23

申请号：US16510705

申请日：2019-07-12

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Wanshi Chen ,  Heechoon Lee ,  Alexandros Manolakos ,  Mostafa Khoshnevisan

IPC: H04W72/02 ,  H04W72/04 ,  H04W76/11 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a first plurality of control resources associated with a first transceiver node and a second plurality of control resources associated with a second transceiver node. The UE may select, based at least in part on a decoding limit for the UE, a decoding configuration to use for decoding one or more control resources from the first plurality of control resources and one or more resources from the second plurality of control resources. The UE may decode control signals received over control resources from the first plurality of control resources and the second plurality of control resources according to the decoding configuration.

公开(公告)号：US10244426B2

公开(公告)日：2019-03-26

申请号：US14799515

申请日：2015-07-14

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Alexei Gorokhov ,  Mariam Motamed ,  Raghu Challa ,  Joshua MacDonald ,  Kai Xie ,  Vivek Padi ,  Alex Mateen ,  Juchuan Ma

IPC: H04L27/00 ,  H04L27/26 ,  H04W28/02 ,  H04W56/00 ,  H04W76/28

Abstract: Aspects of frequency error detection with Physical Broadcast CHannel (PBCH) frequency hypothesis are described. For example, a method and apparatus are disclosed for frequency tracking in a user equipment (UE) may include detecting a change in frequency that exceeds a pull-in range of a frequency tracking loop (FTL) of the UE. The method and apparatus may also include identifying a tracking recovery frequency in response to the change in frequency being detected, wherein the tracking recover frequency is identified from a set of frequency hypotheses and based on decoding of the PBCH received by the UE. The method and apparatus may further include updating the FTL with the tracking recovery frequency.

公开(公告)号：US09414372B2

公开(公告)日：2016-08-09

申请号：US13797907

申请日：2013-03-12

Applicant: QUALCOMM Incorporated

Inventor： Jun Won Choi ,  Huilin Xu ,  Raghu Narayan Challa

IPC: H04W72/04 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04W72/042 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/2685 ,  H04L2027/0024 ,  H04L2027/0053 ,  H04L2027/0069

Abstract: A method for speeding up a filter tracking speed includes scaling filter coefficients based at least in part on an uplink/downlink configuration in a time division duplex (TDD) or a multimedia broadcast single frequency network (MBSFN) system. The method also includes applying scaled filter coefficients during at least one downlink subframe to control a filter tracking speed.

Abstract translation: 用于加速滤波器跟踪速度的方法包括至少部分地基于时分双工（TDD）或多媒体广播单频网络（MBSFN）系统中的上行链路/下行链路配置来缩放滤波器系数。 该方法还包括在至少一个下行链路子帧期间应用缩放的滤波器系数以控制滤波器跟踪速度。

公开(公告)号：US20250168868A1

公开(公告)日：2025-05-22

申请号：US18842355

申请日：2022-05-06

Applicant: QUALCOMM INCORPORATED

Inventor： Zhikun Wu ,  Yuchul Kim ,  Ahmed Elshafie ,  Linhai He ,  Seyedkianoush Hosseini ,  Huilin Xu ,  Yu Zhang

IPC: H04W72/40 ,  H04W24/10 ,  H04W72/12 ,  H04W84/18

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a passive Intemet of Things (IoT) traffic report that indicates a set of passive IoT communications to be performed between the UE and one or more passive IoT devices. The UE may receive a scheduling grant from a network entity in response to the passive IoT traffic report. The scheduling grant may indicate a set of time and frequency resources allocated for the set of passive IoT communications between the UE and the one or more passive IoT devices. Accordingly, the UE may perform the set of passive IoT communications with the one or more passive IoT devices using the set of time and frequency resources indicated by the scheduling grant. The techniques described herein may enable the UE to perform passive IoT communications with fewer signal collisions and lower communication resource overhead.

公开(公告)号：US12302264B2

公开(公告)日：2025-05-13

申请号：US18440963

申请日：2024-02-13

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Xiao Feng Wang ,  Liangping Ma ,  Ayan Sengupta ,  Jun Ma ,  Huilin Xu ,  Peter Gaal ,  Bharat Shrestha

IPC: H04W56/00 ,  H04W4/029 ,  H04W74/0833

Abstract: Non-terrestrial networks (NTNs) may establish uplink (UL) and downlink (DL) radio frame timing structures to efficiently account for propagation delay and propagation delay variation associated with communications in the NTN. NTNs may manage (synchronize) radio frame timing structures of base stations (e.g., satellites) and user equipment (UEs) in the NTN. Further, UEs may determine timing advance (TA) values to be applied to UL transmissions based on their respective scheduling offset (e.g., offset in UL and DL radio frame timing structures), as well as based on propagation delay or round trip time (RTT). As such, served UEs may determine UL timing such that UL transmissions from the UEs to a satellite arrives at the satellite in a time synchronized manner. In other cases, a satellite may determine UL timing, based on reception timing, such that various UEs in the NTN may implement uniform UL and DL radio frame timing structures.

公开(公告)号：US12273183B2

公开(公告)日：2025-04-08

申请号：US17691855

申请日：2022-03-10

Applicant: QUALCOMM Incorporated

Inventor： Weimin Duan ,  Huilin Xu ,  Lianghai Ji ,  Mehmet Izzet Gurelli ,  Jun Ma ,  Qiang Wu ,  Bala Ramasamy ,  Karthik Anantha Swamy

IPC: H04B7/185 ,  H04L5/00 ,  H04W56/00

Abstract: Systems and techniques are provided for wireless communications performed at a network entity. For example, the systems and techniques can include obtaining, at the network entity, a target relative time difference (RTD). A transmission timing pre-compensation can be determined at the network entity between a first reference signal and a second reference signal, wherein the transmission timing pre-compensation is determined based on the target RTD and one or more network delay components. The first reference signal and the second reference signal can be transmitted using the transmission timing pre-compensation to offset the first reference signal from the second reference signal by the target RTD.

公开(公告)号：US12232167B2

公开(公告)日：2025-02-18

申请号：US17753621

申请日：2019-10-02

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Iyab Issam Sakhnini ,  Dan Zhang ,  Huilin Xu ,  Peter Gaal ,  Jun Ma ,  Yiqing Cao

IPC: H04W74/00 ,  H04W76/10

Abstract: Certain aspects of the present disclosure provide techniques for supporting multiple types of random access occasions. A method that may be performed by a user equipment (UE) includes receiving, from a base station (BS), an indication of at least two types of random access occasions (ROs) including a first RO type and a second RO type for communicating in a first coverage area of the BS as part of a random access process for the UE to establish a connection with the BS in the first coverage area. The method further includes transmitting, to the BS, a preamble on an RO of one of the first RO type or the second RO type, wherein a preamble format of the preamble is based on whether the RO is of the first RO type or the second RO type.