公开(公告)号：US11012284B2

公开(公告)日：2021-05-18

申请号：US16802221

申请日：2020-02-26

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tamer Kadous ,  Tao Luo ,  Xiao Feng Wang ,  Jing Lei

IPC: H04L27/34 ,  H04J1/00 ,  H04L27/26 ,  H04L5/00

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：US10965505B2

公开(公告)日：2021-03-30

申请号：US16351302

申请日：2019-03-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L27/10 ,  H04L1/00 ,  H04L27/26 ,  H04J13/00

Abstract: Flexible waveform synthesis is disclosed for new radio (NR) shared spectrum (NR-SS) networks. In order to accommodate variable transmission resources, a transmitter may construct an M×N grid to model a resource element (RE) map of transmission resources available to the transmitter within a shared communication channel, where M corresponds to a number of symbols for a scheduled physical signal and N corresponds to a number of tones of a transmission bandwidth for the transmitter. The transmitter may then map the M×N grid to the RE map and puncture one or more REs associated with the subbands unavailable for transmission in the transmission resources. The transmitter may then transmit a transmission according to the unpunctured REs of the RE map.

公开(公告)号：US10959263B2

公开(公告)日：2021-03-23

申请号：US16160263

申请日：2018-10-15

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Naghshvar ,  Arumugam Chendamarai Kannan ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W74/08 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/10

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may include a plurality of antenna panels. The wireless device may perform a first listen before talk (LBT) procedure for a configuration of a first antenna panel based at least in part on a first LBT timer and may perform a second LBT procedure for a configuration of a second antenna panel based at least in part on a second LBT timer. The wireless device may then perform a multiple user multiple-input multiple-output (MU-MIMO) transmission. The MU-MIMO transmission may include transmitting a first packet to a second wireless device using the configuration of the first antenna and transmitting a second packet to a third wireless device using the configuration of the second antenna.

公开(公告)号：US10938441B2

公开(公告)日：2021-03-02

申请号：US16911180

申请日：2020-06-24

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04B1/7143 ,  H04L5/00 ,  H04B1/7136 ,  H04W16/14 ,  H04B1/713 ,  H04W48/16 ,  H04L27/26

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one example, the apparatus may be a base station. In certain configurations, the apparatus may transmit information indicating a narrowband frequency hopping pattern to at least one UE. In certain aspects, the narrowband frequency hopping pattern may correspond to a plurality of frames. In certain other aspects, the plurality of frames may include at least one non-anchor channel and being associated with a plurality of anchor channels. The apparatus may communicate with the at least one UE using the narrowband frequency hopping pattern, including concurrently transmitting a discovery reference signal (DRS) in each of the plurality of anchor channels at a start of each hopping frame. In certain aspects, communication on the plurality of anchor channels may occur during the same frames.

公开(公告)号：US10932282B2

公开(公告)日：2021-02-23

申请号：US16129545

申请日：2018-09-12

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Vikas Jain ,  Taesang Yoo ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W72/04 ,  H04W72/12 ,  H04L1/18 ,  H04W74/08

Abstract: Wireless communications systems and methods related to determining scheduling and transmission timeline for communicating in a shared communication medium are provided. A first wireless communication device communicates, with a second wireless communication device, scheduling information during a first time period of a first transmission opportunity (TXOP) of a first network operating entity in a shared communication medium, the scheduling information indicating an offset time period relative to the first time period. The first wireless communication device communicates, with the second wireless communication device, a communication signal during a second TXOP subsequent to the first TXOP based on the offset time period.

公开(公告)号：US20210045157A1

公开(公告)日：2021-02-11

申请号：US17079180

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04L5/00 ,  H04L27/00 ,  H04W74/00

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.

公开(公告)号：US10917905B2

公开(公告)日：2021-02-09

申请号：US16357462

申请日：2019-03-19

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04W88/08 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communications, and more particularly for facilitating autonomous uplink transmission (AUL) using shared (e.g., in a synchronized manner among one or more operators) radio frequency spectrum are described. In aspects, a method of wireless communication over a shared medium may include determining, by at least one user equipment (UE) served by a base station associated with a first operator, access is obtained to the shared medium for a transmission opportunity (TXOP) by the base station based on autonomous uplink resources in the TXOP allocated to at least one UE served by the base station and/or an indication from the at least one UE of autonomous uplink data, and transmitting the autonomous uplink data from the at least one UE to the base station.

公开(公告)号：US10912129B2

公开(公告)日：2021-02-02

申请号：US16268278

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04W72/04 ,  H04W28/18 ,  H04W72/12 ,  H04L5/00

Abstract: Synchronization signal block (SSB) multiplexing and remaining material system information (RMSI) monitoring in new radio unlicensed (NR-U) networks are disclosed. For SSB multiplexing, a user equipment (UE) receives an SSB configuration for a discovery signal detection window having a plurality of communication slots, wherein, based on the SSB configuration, UE identifies random access resource and time and frequency locations to monitor remaining minimum system information (RMSI) configured for each SSB. The UE further receives an SSB transmission indicator that reflects a listen before talk (LBT) result, which it may use with the SSB configuration to map one or more SSB for rate matching in selected slots. The UE can then rate match any data transmissions around the identified SSBs in those identified slots regardless of LBT result. The UE may further leverage the SSB configuration and indication of LBT result to monitor SSB transmissions for control resource set (CORESET) transmissions.

公开(公告)号：US10863543B2

公开(公告)日：2020-12-08

申请号：US16204800

申请日：2018-11-29

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04L5/00 ,  H04L27/00 ,  H04W74/00 ,  H04W72/12 ,  H04W16/14

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.

公开(公告)号：US20200374897A1

公开(公告)日：2020-11-26

申请号：US16988543

申请日：2020-08-07

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04L27/26 ,  H04L1/00 ,  H04L1/18 ,  H04W74/00 ,  H04L1/16 ,  H04L5/00

Abstract: Techniques for autonomous uplink (AUL) transmissions are provided that allow for efficient use of shared radio frequency spectrum band resources. A user equipment (UE) may determine a duration of an AUL transmission and modify an uplink waveform or provide an indication to a base station of one or more channel resources that may be available for base station transmissions, in order to more fully utilize shared radio frequency spectrum band resources within a maximum channel occupancy time (MCOT). A base station may activate or deactivate AUL transmissions through downlink control information (DCI) transmitted to the UE. A UE and base station may exchange various other control information to provide relatively efficient autonomous uplink transmissions and use of the shared radio frequency spectrum band resources.