公开(公告)号：US20180124726A1

公开(公告)日：2018-05-03

申请号：US15802191

申请日：2017-11-02

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia ZHANG ,  Taesang Yoo ,  Juan Montojo ,  Tao Luo ,  Zhifei Fan

IPC: H04W56/00 ,  H04W72/04

CPC classification number: H04W56/0005 ,  H04L27/261 ,  H04L27/2692 ,  H04W72/0453

Abstract: Various aspects described herein relate to techniques for signaling and channel design in wireless communications systems (e.g., a 5G NR system). In an aspect, a method includes identifying a direct current (DC) subcarrier of a synchronization bandwidth, determining whether a synchronization signal transmits on, punctures, or rate matches around the DC subcarrier, and performing synchronization channel processing based on the determination.

公开(公告)号：US20180097667A1

公开(公告)日：2018-04-05

申请号：US15442482

申请日：2017-02-24

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Dinkar Vasudevan ,  Seyedkianoush Hosseini ,  Jing Sun ,  Xiaoxia Zhang ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04L25/03 ,  H04L27/34 ,  H04L12/703 ,  H04B17/14

CPC classification number: H04L25/0398 ,  H04B7/024 ,  H04B17/11 ,  H04B17/14 ,  H04B17/30 ,  H04B17/309 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0242 ,  H04L25/03955 ,  H04L25/03987 ,  H04L27/3488 ,  H04L45/28

Abstract: Wireless communications systems and methods related to over-the-air uplink-downlink (UL-DL) reciprocity calibration. A central unit transmits downlink (DL) calibration reference signal (RS) and a calibration request. The central unit receives, in response to the calibration request, a first uplink (UL) calibration RS and a first DL channel estimate associated with a first transmission point (TP) and a first wireless communication device. The central unit transmits a DL coordinated multipoint (CoMP) joint transmission signal according to an uplink-downlink (UL-DL) reciprocity calibration. The UL-DL reciprocity calibration is based on at least a first UL channel estimate based on the first UL calibration RS, the first DL channel estimate, a second UL channel estimate associated with a second TP and the first wireless communication device, and a second DL channel estimate associated with the second TP and the first wireless communication device.

公开(公告)号：US20180054832A1

公开(公告)日：2018-02-22

申请号：US15659592

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/08

Abstract: Various aspects of the disclosure relate to feedback for independent links. For example, channel state feedback may be based on the channel state of multiple links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). In some scenarios, channel state information (CSI) feedback may take into account the CSI-reference signals (CSI-RSs) from multiple links. For example, CSI feedback may be based on CSI-RSs from multiple links if the antenna sub-arrays for the links are close to one another. As another example, a decision as to whether CSI feedback is to be based on CSI-RSs from multiple links may depend on channel conditions.

公开(公告)号：US20180054811A1

公开(公告)日：2018-02-22

申请号：US15659576

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04W72/04 ,  H04W72/12

Abstract: Various aspects of the disclosure relate to communicating control information for independent links. For example, control information for one link may be sent via at least one other link. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). In some scenarios, one link may carry control information for multiple links. For example, one link may indicate the existence of or traffic on at least one other link. As another example, one link may transmit feedback for multiple links. In some scenarios, each link may be provisioned (e.g., as a primary link or a secondary link) to carry specific types of control information for one or more links.

公开(公告)号：US20180054348A1

公开(公告)日：2018-02-22

申请号：US15659598

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04L12/24 ,  H04W72/08 ,  H04L5/00

CPC classification number: H04L45/16 ,  H03M13/09 ,  H04B7/0626 ,  H04B7/0691 ,  H04B7/216 ,  H04B17/24 ,  H04B17/318 ,  H04L1/1854 ,  H04L5/003 ,  H04L5/0053 ,  H04L5/0094 ,  H04L12/1827 ,  H04L12/185 ,  H04L41/0668 ,  H04L2001/0093 ,  H04W24/02 ,  H04W24/04 ,  H04W24/08 ,  H04W48/08 ,  H04W52/146 ,  H04W52/16 ,  H04W52/241 ,  H04W52/243 ,  H04W52/346 ,  H04W52/386 ,  H04W52/42 ,  H04W52/50 ,  H04W52/54 ,  H04W52/56 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/044 ,  H04W72/0493 ,  H04W72/08 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1278 ,  H04W72/1284 ,  H04W76/19 ,  H04W76/22 ,  H04W92/20

Abstract: Various aspects of the disclosure relate to beam information for independent links. For example, beam information for one link may be sent on at least one other link. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). For example, the first device may communicate with a second device (e.g., a TRP) via a first link and communicate with a third device (e.g., a TRP) via a second link. In some scenarios, one link can indicate beam switching for at least one other link. In some scenarios, one link can indicate link recovery for at least one other link. In some scenarios, one link can indicate link failure for at least one other link.

公开(公告)号：US09877203B2

公开(公告)日：2018-01-23

申请号：US15141398

申请日：2016-04-28

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Siddhartha Mallik ,  Xiaoxia Zhang ,  Jing Sun ,  Arumugam Chendamarai Kannan

IPC: H04W16/14 ,  H04L1/16 ,  H04L5/00 ,  H04L1/00 ,  H04W24/10 ,  H04W48/16 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12

CPC classification number: H04W16/14 ,  H04L1/0003 ,  H04L1/16 ,  H04L1/1861 ,  H04L5/0033 ,  H04L5/0048 ,  H04L5/0055 ,  H04L5/0057 ,  H04L5/0073 ,  H04W24/10 ,  H04W48/16 ,  H04W72/0453 ,  H04W72/085 ,  H04W72/1284

Abstract: Methods, systems, and devices are described for wireless communication. A device may use enhanced reporting mechanisms to support control information reporting on shared spectrum. In some cases, a device may utilize enhanced component carriers (eCCs) for data transmissions. In one example, the device may transmit control information (e.g., ACK/NACK, CSI, etc.) to a corresponding device using a CCA exempt transmission (CET). In another example, a device may report control information quasi-periodically. For instance, a device may be assigned a specified interval and a control feedback window for reporting control information (e.g., CSI). The window may provide a duration prior and subsequent to the specified interval during which a UE may transmit control information. For example, the device may perform a CCA reserving the channel for a duration that does not include the specified interval but may transmit feedback information based on determining the specified interval falls within the assigned window.

公开(公告)号：US09820245B2

公开(公告)日：2017-11-14

申请号：US14181953

申请日：2014-02-17

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

IPC: H04W72/04 ,  H04W56/00 ,  H04J11/00 ,  H04W24/02

CPC classification number: H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

Abstract: Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

公开(公告)号：US20170311188A1

公开(公告)日：2017-10-26

申请号：US15461368

申请日：2017-03-16

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Tao Luo

IPC: H04W24/08 ,  H04L5/00

CPC classification number: H04W24/08 ,  H04B7/0413 ,  H04L1/1854 ,  H04L1/1896 ,  H04L5/0048 ,  H04L5/0096 ,  H04L23/00 ,  H04L25/023 ,  H04L27/261

Abstract: A base station may determine a Doppler metric associated with a wireless channel and a user equipment (UE). The Doppler metric may be determined from received information related to Doppler effects measured by the UE or from directly measured Doppler effects associated with uplink data received from the UE. Based on the determined Doppler metric, the base station may select one or both of a reference signal (RS) density and a channel estimation technique for the wireless channel and associated UE. The base station may transmit an indication of the RS density to the UE. Downlink data bursts and uplink data bursts may include RSs and data according to the indicated RS density. Further, the base station may transmit to the UE, an indication to communicate using the selected wireless channel estimation technique.

公开(公告)号：US20170215171A1

公开(公告)日：2017-07-27

申请号：US15351216

申请日：2016-11-14

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Juan Montojo ,  Zhifei Fan

IPC: H04W72/04 ,  H04W72/14 ,  H04W72/12

Abstract: Methods, systems, and apparatuses for uplink descriptor channels are described. An uplink descriptor channel may be used by a user equipment (UE) for providing indications that uplink transmissions over allocated uplink data resources are sent in a configuration different from a configuration indicated by an uplink grant. In various examples an uplink transmission may be transmitted by a UE, and received by a base station, and the uplink transmission may include the uplink descriptor channel with uplink data. An uplink descriptor channel may include indications that uplink control information is included in the uplink transmission, and/or that the uplink transmission employs a number of transmission intervals, a number of channels, and/or a different MCS than those indicated by the uplink grant. A base station may receive the uplink descriptor channel and adjust various parameters of decoding an uplink transmission and/or allocating radio frequency spectrum resources.

公开(公告)号：US20170134206A1

公开(公告)日：2017-05-11

申请号：US15229628

申请日：2016-08-05

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Lu Zhao

IPC: H04L27/26 ,  H04L25/02 ,  H04B17/345

CPC classification number: H04L27/2691 ,  H04B15/00 ,  H04B17/345 ,  H04J3/10 ,  H04J11/0056 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0062 ,  H04L5/0073 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2695 ,  H04W16/32 ,  H04W24/10

Abstract: A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.