公开(公告)号：US20130107805A1

公开(公告)日：2013-05-02

申请号：US13665302

申请日：2012-10-31

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi ,  Taesang Yoo ,  Lu Zhao ,  Myriam Rajih ,  Hendrik Schoeneich

IPC: H04W4/00

CPC classification number: H04L25/03891 ,  H04J11/0023 ,  H04L25/03993

Abstract: A system for wireless communication reduces implementation complexity for symbol level interference cancellation as applied to physical control and data channels, such as the physical downlink shared channel (PDSCH) and physical downlink control channel (PDCCH). A user equipment (UE) categorizes tones of a signal into tone groups. A different noise whitening matrix is applied to each tone group for demodulation and decoding of the signal.

Abstract translation: 用于无线通信的系统降低了应用于诸如物理下行链路共享信道（PDSCH）和物理下行链路控制信道（PDCCH）的物理控制和数据信道的符号级干扰消除的实现复杂度。 用户设备（UE）将信号的音调分类为音调组。 将不同的噪声白化矩阵应用于每个音调组以进行信号的解调和解码。

公开(公告)号：US11856559B2

公开(公告)日：2023-12-26

申请号：US17248248

申请日：2021-01-15

Applicant: QUALCOMM INCORPORATED

Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei

IPC: H04W52/14 ,  H04W72/044 ,  H04L5/00 ,  H04W72/1268 ,  H04W72/23 ,  H04W74/00 ,  H04W72/21 ,  H04W4/10 ,  H04W76/45

CPC classification number: H04W72/044 ,  H04L5/0055 ,  H04W52/14 ,  H04W72/1268 ,  H04W72/21 ,  H04W72/23 ,  H04W74/004 ,  H04W4/10 ,  H04W76/45

Abstract: Wireless communications systems and methods related to uplink communications with transmission on-off patterns and frequency-hopping in a shared radio frequency band are provided. A first wireless communication device communicates, with a second wireless communication device, a configuration indicating a plurality of uplink (UL) transmission on-off patterns that are offset from each other in time. The first wireless communication device communicates, with the second wireless communication device in an unlicensed band, a first UL communication signal based on a first UL transmission on-off pattern of the plurality of UL transmission on-off patterns.

公开(公告)号：US11750343B2

公开(公告)日：2023-09-05

申请号：US16789191

申请日：2020-02-12

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Madhavan Srinivasan Vajapeyam ,  Wanshi Chen ,  Peter Gaal ,  Tao Luo ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04L5/00 ,  H04W56/00 ,  H04W76/27 ,  H04W72/541 ,  H04W24/08 ,  H04W72/0446 ,  H04W74/00 ,  H04W76/12 ,  H04W88/08

CPC classification number: H04L5/0048 ,  H04W24/08 ,  H04W56/00 ,  H04W56/0015 ,  H04W72/0446 ,  H04W72/541 ,  H04W74/006 ,  H04W76/12 ,  H04W76/27 ,  H04W88/08

Abstract: Techniques are described for wireless communication. A first method may include receiving at a user equipment (UE) over an unlicensed radio frequency spectrum band an indication of a time window associated with a transmission of a synchronization signal, and monitoring the unlicensed radio frequency spectrum band during the time window to receive a synchronization signal from a base station. A second method may include transmitting an indication of a time window associated with a transmission of a synchronization signal; performing a plurality of clear channel assessments (CCAs) on an unlicensed radio frequency spectrum band during the time window; and transmitting the synchronization signal over the unlicensed radio frequency spectrum band at a transmission time during the time window. The transmission time may be based at least in part on a result of at least one of the CCAs.

公开(公告)号：US11743897B2

公开(公告)日：2023-08-29

申请号：US14503584

申请日：2014-10-01

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Wanshi Chen ,  Durga Prasad Malladi ,  Yongbin Wei ,  Naga Bhushan ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Tingfang Ji ,  Hao Xu ,  Peter Gaal

IPC: H04W72/21 ,  H04L5/00 ,  H04L27/00 ,  H04B7/0452 ,  H04W74/08 ,  H04B7/06 ,  H04W16/14 ,  H04B7/0456

CPC classification number: H04W72/21 ,  H04B7/0452 ,  H04L5/001 ,  H04L5/0032 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0073 ,  H04L27/0006 ,  H04W74/0833 ,  H04B7/0456 ,  H04B7/0604 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0053 ,  H04W16/14

Abstract: Techniques are described for wireless communication. An orthogonal frequency-division multiple access (OFDMA) configuration of an uplink channel is identified for communications in an unlicensed radio frequency spectrum band. An OFDMA waveform is generated based on the identified OFDMA configuration. The OFDMA waveform is communicated in a signal in the unlicensed radio frequency spectrum band. A virtual cell identifier of a first base station may be associated with transmissions between the first base station and a first user equipment (UE). A set of common resource blocks may be identified for transmission of a demodulation reference signal (DM-RS) between the first base station and the first UE. A configuration of an uplink channel may be dynamically selected for uplink communications in an unlicensed radio frequency spectrum band. A waveform may be generated based on the selected configuration. The waveform may be communicated in a signal in the unlicensed radio frequency spectrum band.

公开(公告)号：US11711683B2

公开(公告)日：2023-07-25

申请号：US17078905

申请日：2020-10-23

Applicant: QUALCOMM incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang ,  Yongbin Wei

IPC: H04W8/00 ,  H04W72/02 ,  H04L5/00 ,  H04W72/1263 ,  H04W92/18

CPC classification number: H04W8/005 ,  H04L5/0055 ,  H04W72/02 ,  H04W72/1263 ,  H04W92/18

Abstract: Methods, systems, and devices for wireless communications are described. In a first case, a first user equipment (UE) may transmit to a second UE a sidelink discovery message preamble corresponding to a sidelink discovery message. The first UE may identify resources for transmission of the sidelink discovery messages based on the sidelink discovery message preamble. The first UE may either transmit the sidelink discovery message to the second UE or may receive the sidelink discovery message from the second UE using the identified resources for the transmission of the sidelink discovery message. In some cases, the second UE may transmit sidelink control information (SCI) to the first UE, and may transmit a sidelink discovery message to the first UE based on resources identified in the SCI. In some cases, the first UE may transmit the sidelink discovery message without transmission of a preamble or a SCI.

公开(公告)号：US11589383B2

公开(公告)日：2023-02-21

申请号：US16871971

申请日：2020-05-11

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Jing Lei ,  Juan Montojo ,  Yongbin Wei

IPC: H04W74/00 ,  H04L5/00 ,  H04W16/14 ,  H04W72/1268 ,  H04W88/04 ,  H04W74/08 ,  H04W88/06

Abstract: Methods and apparatuses for transmitting and detecting channel reservation preamble in a NR shared spectrum are described. An aspect may include determining whether a first reservation preamble of a first operator is received on a first time slot of multiple time slots of a downlink channel from a first network entity, and transmitting a second reservation preamble of the first operator on an uplink channel to the second network entity. Another aspect may include generating a first reservation preamble of a first operator based on at least one of a compressed representation in a signal space, a basis function of the signal space, or a CAZAC sequences; and transmitting, on a first timeslot of multiple time slots of a downlink channel, the first reservation preamble of the first operator to at least a UE.

公开(公告)号：US11570811B2

公开(公告)日：2023-01-31

申请号：US16995644

申请日：2020-08-17

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Yongbin Wei

IPC: H04W74/08 ,  H04W74/00 ,  H04W24/08 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. A base station may identify a listen-before-talk (LBT) procedure to use for transmitting a downlink signal to a user equipment (UE) on a shared radio frequency spectrum band. The LBT procedure may be a group LBT procedure associated with a first set of contention window durations or an individual listen-before talk procedure associated with a second set of contention window durations. The base station may determine a contention window duration corresponding to the identified LBT procedure, perform the identified LBT procedure using the determined contention window duration, and transmit the downlink signal to the UE based on the performed LBT procedure.

公开(公告)号：US11563533B2

公开(公告)日：2023-01-24

申请号：US17081405

申请日：2020-10-27

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei

IPC: H04W4/00 ,  H04L5/00 ,  H04W4/70 ,  H04W74/08 ,  H04W48/08 ,  H04W16/14

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for narrowband communications using frequency hopping in an unlicensed frequency band. In some implementations, a base station (BS) may transmit downlink (DL) data using a sequence of DL hopping frames on a corresponding sequence of unique hopping channels associated with a DL frequency hopping pattern. In some implementations, each user equipment (UE) of one or more UEs may transmit uplink (UL) data using a sequence of UL hopping frames on a corresponding sequence of unique hopping channels associated with a different UL frequency hopping pattern.

公开(公告)号：US11483803B2

公开(公告)日：2022-10-25

申请号：US17247121

申请日：2020-11-30

Applicant: QUALCOMM INCORPORATED

Inventor： Yisheng Xue ,  Chih-Hao Liu ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei

IPC: H04W28/26 ,  H04W72/04 ,  H04W74/08

Abstract: Wireless communications systems and methods related to autonomous sidelink communication are provided. A first user equipment (UE) communicates, in a first subband of a plurality of subbands within a shared radio frequency band during a first time period, first sidelink control information (SCI) associated with a second subband of the plurality of subbands. The first UE communicates, with the second UE, first sidelink data in the second subband during the first time period based on the first SCI. The first UE communicates, with the second UE in the first subband during a second time period, second SCI associated with a third subband of the plurality of subbands, the third subband being different from the second subband based on a frequency hopping pattern. The first UE communicates, with the second UE, second sidelink data in the third subband during the second time period based on the second SCI.

公开(公告)号：US11431459B2

公开(公告)日：2022-08-30

申请号：US14456880

申请日：2014-08-11

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Naga Bhushan ,  Wanshi Chen ,  Durga Prasad Malladi ,  Tingfang Ji ,  Tao Luo ,  Yongbin Wei ,  Peter Gaal

IPC: H04L5/00 ,  H04W16/14 ,  H04W74/08 ,  H04L1/16

Abstract: Methods, systems, devices, and apparatuses are described for wireless communications. In one method, a set of one or more data subframes of a data frame may be transmitted over an unlicensed spectrum, to a user equipment (UE), during a transmission period. A group hybrid automatic repeat request (HARQ) feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be received over the unlicensed spectrum, from the UE, during the transmission period. In another method, a set of one or more data subframes of a data frame may be received over an unlicensed spectrum during a transmission period. A group HARQ feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be transmitted over the unlicensed spectrum during the transmission period.