公开(公告)号：US20180367362A1

公开(公告)日：2018-12-20

申请号：US16003456

申请日：2018-06-08

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Tamer KADOUS ,  Tao LUO ,  Xiao Feng WANG ,  Jing LEI

IPC: H04L27/34 ,  H04L27/26 ,  H04J1/00

Abstract: In order to maintain flexible system bandwidth and a flexible center frequency, without requiring a cyclic prefix or guard interval, a transmitter apparatus transmits a reference signal based on a single carrier waveform having a mixed symbol structure, in reference signal symbols using at least one of a cyclic prefix and a guard interval and transmits data based on the single carrier waveform without the cyclic prefix or the guard interval. The data may be based on input data processed using overlapping FFT windows, and an amount of overlap between the FFT windows may be configurable by the transmitter or the receiver. An apparatus receiving the downlink transmission comprising data based on a single carrier waveform may process the data based on overlapping FFT windows.

公开(公告)号：US20180324713A1

公开(公告)日：2018-11-08

申请号：US15964851

申请日：2018-04-27

Applicant: QUALCOMM Incorporated

Inventor： Taesang YOO ,  Jing SUN ,  Siddhartha MALLIK ,  Xiaoxia ZHANG ,  Tamer Adel KADOUS

IPC: H04W52/32 ,  H04W72/04

CPC classification number: H04W52/325 ,  H04W52/40 ,  H04W72/0473

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for sounding reference signal (SRS) coordination, power control, and synchronization for distributed coordinated multipoint (CoMP) using communications systems operating according to new radio (NR) technologies. For example, a method for wireless communications by a network entity includes determining a first amount of transmission (Tx) power for transmission of signals originating from a first cluster center that is connected to the network entity, determining a second amount of Tx power for transmission of signals originating from at least a second cluster center that is connected to the network entity, and transmitting signals for one or more user equipment (UEs) served by the first cluster center and one or more UEs served by the second cluster center based on the first amount of Tx power and the second amount of Tx power.

公开(公告)号：US20180288757A1

公开(公告)日：2018-10-04

申请号：US15927895

申请日：2018-03-21

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Tao LUO ,  Makesh Pravin JOHN WILSON ,  Xiao feng WANG

IPC: H04W72/04 ,  H04W24/04

Abstract: A base station may maintain multiple beam pair links, with one being actively used for communication. The active beam pair may become blocked. Accordingly, it may be necessary to switch to another beam pair. The apparatus may be an apparatus for wireless communication. The apparatus for wireless communication may include a memory and at least one processor coupled to the memory. The at least one processor is configured to determine a set of active beam pairs including at least a first beam pair and a second beam pair and select the first beam pair. The at least one processor is also configured to predict that the first beam pair is blocked, the prediction based on an expiration of a timer and sweep through the set of active beam pairs based on predicting that the first beam pair is blocked.

公开(公告)号：US20180287762A1

公开(公告)日：2018-10-04

申请号：US15910662

申请日：2018-03-02

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Tao LUO ,  Rahul MALIK ,  Sony AKKARAKARAN ,  Tamer KADOUS ,  Akula REDDY

IPC: H04L5/00

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to control resource sets (coresets) for transmitting physical downlink control channels using either a single-carrier waveform or a multicarrier waveform in communications systems operating according to new radio (NR) technologies. In an exemplary method, a base station may determine whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth and configured for a user equipment (UE), conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform, and transmit the PDCCH to the UE using the determined waveform.

公开(公告)号：US20180279210A1

公开(公告)日：2018-09-27

申请号：US15928928

申请日：2018-03-22

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Tao LUO ,  Heechoon LEE

IPC: H04W48/12 ,  H04W72/04 ,  H04L25/02

CPC classification number: H04W48/12 ,  H04L5/0053 ,  H04L25/0238 ,  H04W72/042 ,  H04W72/14

Abstract: A method and apparatus for enhancing channel estimation by using a binary tree based PDCCH search space in a new radio wireless communication system is disclosed. For example, a UE may identify an aggregation level profile having an aggregation level value for one or more aggregation levels, wherein each aggregation level corresponds to a respective number of resources to use for decoding a PDCCH, determine one or more decoding candidates for the UE from among a plurality of available decoding candidates defined as nodes in a binary tree for a search space based on the aggregation level profile, determine respective CCEs corresponding to each of the one or more decoding candidates, each respective CCE including one or more REGs, and performing channel estimation for each of the respective CCEs for use in demodulating and decoding downlink control information for the UE in the PDCCH.

公开(公告)号：US20180124765A1

公开(公告)日：2018-05-03

申请号：US15641918

申请日：2017-07-05

Applicant: QUALCOMM Incorporated

Inventor： Tao LUO ,  Jing SUN

IPC: H04W72/04 ,  H04B7/0413 ,  H04B7/06 ,  H04L12/24

Abstract: Aspects of the present disclosure provide techniques for informing devices of the use of transmit and receive beams in a beamforming communication system. An exemplary method includes determining a plurality of beam directions for a device to use in different transmission time intervals (TTIs) of a TTI burst, and sending a directional transmission to the device indicating at least one of the beam directions.

公开(公告)号：US20180098358A1

公开(公告)日：2018-04-05

申请号：US15619094

申请日：2017-06-09

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Peter GAAL ,  Wanshi CHEN ,  Hao XU ,  Jing SUN

IPC: H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04W52/34 ,  H04W52/32

CPC classification number: H04W74/0833 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0092 ,  H04L5/0096 ,  H04W52/325 ,  H04W52/34 ,  H04W72/042 ,  H04W72/0453

Abstract: Certain aspects of the disclosure relate to techniques and apparatus for improving random access for SRS switching in a wireless network. Prior to transmitting a SRS, a UE may interrupt communication on a first carrier to switch from the first carrier to a second carrier to transmit a PRACH. To reduce interruption to the first carrier, the UE may use the beginning symbol(s) of a UpPTS on the second carrier to transmit the PRACH. In addition, to reduce interruption to the first carrier, the UE may monitor for another PDCCH order before transmitting another PRACH. Further, aspects of the present disclosure provide techniques and apparatus for jointly triggering SRS transmissions and performing power control for SRS transmissions. A BS may trigger SRS transmissions from multiple UEs, trigger SRS transmissions from multiple carriers from the same UE at the same time and/or perform power control separately for each carrier.

公开(公告)号：US20180027590A1

公开(公告)日：2018-01-25

申请号：US15630689

申请日：2017-06-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Jing SUN ,  Peter GAAL

IPC: H04W74/08 ,  H04W28/02 ,  H04W76/04 ,  H04W16/14

CPC classification number: H04W74/0808 ,  H04W16/14 ,  H04W28/0205 ,  H04W72/02 ,  H04W76/28

Abstract: Various aspects described herein relate to reducing transmission latency in unlicensed spectrum. These latency reduction techniques include enabling ultra low latency (ULL) traffic to gain fast channel access. These latency reduction techniques further include updating a size of a contention window for channel access. In addition, these latency reduction techniques include enhancing CPDCCH-based signaling to accommodate the ULL frame structure. Further, these latency reduction techniques include providing robust operation against bursty interference for ULL transmissions. Moreover, these techniques include managing DRX for ULL. Additionally, these latency reduction techniques include joint scheduling of different TTI durations. These latency reduction techniques further include updating SRS transmission opportunities. In addition, these latency reduction techniques include reducing latency associated with PRACH transmissions. Further, these latency reduction techniques include reducing ULL transmission delays by either ignoring or cancelling scheduled uplink (e.g., LTE) transmissions.

公开(公告)号：US20170324528A1

公开(公告)日：2017-11-09

申请号：US15479113

申请日：2017-04-04

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Wanshi CHEN ,  Peter GAAL ,  Jing SUN ,  Hao XU ,  Srinivas YERRAMALLI

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

CPC classification number: H04L5/0048 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/14 ,  H04W56/00 ,  H04W72/0446

Abstract: An apparatus may use inactive uplink portions of a downlink CC to transmit SRS to an eNB. At times there may be a collision between the SRS transmission and uplink transmissions or downlink transmissions on another CC. The apparatus receives a carrier aggregation configuration for a first downlink CC and a second CC, determines to transmit an uplink transmission on the second CC or to receive a downlink transmission on the second CC, determines that the SRS would at least partially collide with the uplink transmission or the downlink transmission, and determines to adjust at least one of the uplink transmission, the SRS transmission, or reception of the downlink transmission based on the determination of the collision and an interruption time to transmit the SRS in the uplink portion of the first CC.

公开(公告)号：US20150078483A1

公开(公告)日：2015-03-19

申请号：US14026877

申请日：2013-09-13

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Amit Mahajan ,  Sai C. Kwok ,  Rashid Ahmed Akbar Attar

IPC: H04B1/04 ,  H04B1/00

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F3/24 ,  H04B1/005 ,  H04B2001/045 ,  H04L5/0066 ,  H04L27/0008 ,  H04W88/06

Abstract: Various aspects of the present disclosure are directed to apparatuses and methods that can mitigate the undesirable effects of residual side band (RSB) signal by actively re-tuning the local oscillator of a transmitter to be at or near the center frequency of the carrier. Other aspects, embodiments, and features are also claimed and described.

Abstract translation: 本公开的各个方面涉及通过主动地将发射机的本地振荡器重新调谐到载波的中心频率或接近载波的中心频率来减轻残余边带（RSB）信号的不期望的影响的装置和方法。 还要求和描述其它方面，实施例和特征。