公开(公告)号：US20200313932A1

公开(公告)日：2020-10-01

申请号：US16828368

申请日：2020-03-24

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad ,  Tanumay Datta

IPC: H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04W74/08

Abstract: Techniques and devices for wireless communications are described that provide for staggering sounding reference signal (SRS) transmissions in frequency across multiple orthogonal frequency division multiplexing (OFDM) symbols, which may allow multiple UEs to transmit SRS using a common listen-before-talk (LBT) gap for a LBT procedure. The techniques also provide for transmitting an SRS across multiple OFDM symbols using same frequency resources, and an orthogonal cover code (OCC) may be applied to the SRS transmission of each OFDM symbol, which may allow multiple UEs to transmit concurrent SRS using a common LBT gap.

公开(公告)号：US10764021B2

公开(公告)日：2020-09-01

申请号：US15710731

申请日：2017-09-20

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Xiao feng Wang ,  Alberto Rico Alvarino ,  Hao Xu

IPC: H04L5/14 ,  H04W72/12 ,  H04L5/00 ,  H04B7/26 ,  H04L5/22 ,  H04W72/04 ,  H04L27/26 ,  H04L1/08 ,  H04L25/02 ,  H04L1/00 ,  H04W74/08 ,  H04L5/26

Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In a further aspect, the apparatus may receive information associated with a narrowband TDD frame structure having a first contiguous uplink transmission duration. The apparatus may transmit a first portion of an uplink transmission comprising a first number of slots in the first contiguous uplink transmission duration. In certain aspects, the uplink transmission may have a duration longer than the first contiguous uplink transmission duration.

公开(公告)号：US10750492B2

公开(公告)日：2020-08-18

申请号：US16224154

申请日：2018-12-18

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Kapil Bhattad ,  Jing Sun

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/08

Abstract: Certain aspects of the present disclosure relate to a method and apparatus for receiving a medium occupation and a resource block group (RBG) size from a gNB, wherein the radio block group size is based on a bandwidth part (BWP) configuration. In one example, UEs with smaller BWP have finer granularity in RBG size in terms of PRBs, while UEs with larger BWP may have a coarser granularity in RBG size in terms of PRBs. An additional guard band may be used if the gNB reserves some channels such that not all of the BW is occupied. For example, if the gNB reserves the 20 MHz channel, it may perform better by adding additional guard band on each side of the 20 MHz bandwidth to accommodate an adjacent channel leakage-power ratio (ACLR). Another aspect of the present disclosure relates to assigning a UE an interlace with equally spaced PRBs.

公开(公告)号：US20200245367A1

公开(公告)日：2020-07-30

申请号：US16735370

申请日：2020-01-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Andrei Dragos Radulescu ,  Ananta Narayanan Thyagarajan ,  Pravjyot Singh Deogun ,  Xiaoxia Zhang ,  Kapil Bhattad

IPC: H04W74/08 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain a signal received over a wireless channel, the signal configuring one or more random access parameters for the wireless channel. The UE may obtain a downlink control signal over the wireless channel, wherein the downlink control signal comprises an indication of a trigger and a location of one or more random access occasions for the UE. The UE may output, based at least in part on the downlink control signal, a random access signal for transmission on the wireless channel during at least one of the one or more random access occasions and according to the one or more random access parameters and the location. The UE may establish a connection with a base station based at least in part on the random access signal.

公开(公告)号：US20200154341A1

公开(公告)日：2020-05-14

申请号：US16681554

申请日：2019-11-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad

IPC: H04W48/10 ,  H04W72/14

Abstract: A user equipment (UE) may receiving, from a base station, a synchronization signal block (SSB) of a set of quasi-collocated (QCL) SSBs, the SSB comprising an indication of a parameter indicating information associated with a plurality of downlink control channel locations corresponding to the set of QCL SSBs. The UE may determine, based at least in part on the parameter, the plurality of downlink control channel locations corresponding to the set of QCL SSBs. The UE may receive a downlink grant for a system information based at least in part on monitoring one or more downlink control channel locations of the plurality of downlink control channel locations. The UE may receive the system information based at least in part on the downlink grant. The UE may establish a connection with the base station based at least in part on the SSB and the received system information.

公开(公告)号：US10602525B2

公开(公告)日：2020-03-24

申请号：US15897755

申请日：2018-02-15

Applicant: QUALCOMM Incorporated

Inventor： Raj K. Kumar ,  Kapil Bhattad ,  Dhananjay A. Gore

IPC: H04L12/28 ,  H04W72/08 ,  H04L1/00 ,  H04L1/18

Abstract: A method of wireless communication includes determining a set of subframes with a reduced likelihood of being received as uplink transmissions of a first user equipment (UE). The method also includes scheduling uplink transmissions of the first UE by scheduling uplink control information (UCI) on subframes other than the determined set of subframes.

公开(公告)号：US10588119B2

公开(公告)日：2020-03-10

申请号：US15926848

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Alberto Rico Alvarino ,  Peter Gaal ,  Hao Xu

IPC: H04W72/04 ,  H04L5/00 ,  H04W24/08 ,  H04W4/70 ,  H04W88/02

Abstract: A narrowband apparatus determines a set of monitored resource blocks (RBs) on a subframe for monitoring for CRS from a base station monitors for the CRS from the base station on the subframe based on the set of monitored RBs. The base station determines a bandwidth for transmitting the CRS to a user equipment, wherein the bandwidth is less than a system bandwidth and transmits the CRS to the UE using the determined bandwidth, wherein the UE monitors for the CRS on a set of monitored RBs. The set of monitored RBs may include RBs allocated for a PDCCH search space, PDCCH and/or PDSCH transmissions and may further include RBs M subframes after and/or N subframes before the monitored RBs. The set of monitored RBs may include X RBs around a PDCCH search space and/or PDSCH.

公开(公告)号：US10587362B2

公开(公告)日：2020-03-10

申请号：US15955983

申请日：2018-04-18

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Kapil Bhattad ,  Wanshi Chen ,  Hao Xu

IPC: H04L1/00 ,  H04W28/04 ,  H04W8/22

Abstract: A method of wireless communication of a user equipment (UE) includes communicating with a base station using a baseline channel code. The baseline code may include a tail-biting convolutional code (TBCC), or turbo code (TC). The method also includes sending information to the base station indicating a capability of the UE to support multiple channel codes. The method further includes receiving, from the base station, a configuration to operate with any one of the channel codes.

公开(公告)号：US20200068625A1

公开(公告)日：2020-02-27

申请号：US16522537

申请日：2019-07-25

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Kapil Bhattad ,  Zhifei Fan

IPC: H04W74/08 ,  H04W72/04

Abstract: Physical Random Access Channel (PRACH) interlacing is disclosed. In a particular implementation, a method of performing wireless communications adjusting, by a user equipment (UE) based on a cyclic prefix (CP) length of a received Physical Random Access Channel (PRACH) configuration, CP length of one or more uplink channels to match the CP length of the PRACH configuration. The method additionally includes transmitting, by the UE, the one or more uplink channels interlaced with a PRACH channel that corresponds to the PRACH configuration. The PRACH channel and the one or more uplink channels are aligned.

公开(公告)号：US20200059916A1

公开(公告)日：2020-02-20

申请号：US16515765

申请日：2019-07-18

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad

IPC: H04W72/04 ,  H04W16/14

Abstract: Design of control resource sets (CORESETs) is disclosed for new radio (NR) unlicensed (NR-U) operations with subband access. A default CORESET may be defined for multiple or all subbands within the allocated NR system bandwidth where each subband is covered by a sub-CORESET. When a decoding candidate of the set of decoding candidates spans the boundary of multiple sub-CORESETs, a base station may either remove the overlapping decoding candidate from the set of decoding candidates, shift the decoding candidate into the next location fully within a sub-CORESET, or continue transmission of the decoding candidate while puncturing the portion on the inaccessible subband. In the puncturing option, a user equipment (UE) would perform additional blind decoding in each subband according to the associated sub-CORESET. In additional aspects, after beginning of a transmission opportunity, the UE uses the knowledge of accessible subbands for fast CORESET switching via broadcast or UE-specific signaling.