公开(公告)号：US20210314889A1

公开(公告)日：2021-10-07

申请号：US17214538

申请日：2021-03-26

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Xiao Feng Wang ,  Liangping Ma ,  Ayan Sengupta ,  Jun Ma ,  Huilin Xu ,  Peter Gaal ,  Bharat Shrestha

IPC: H04W56/00 ,  H04W4/029 ,  H04W74/08

Abstract: Non-terrestrial networks (NTNs) may establish uplink (UL) and downlink (DL) radio frame timing structures to efficiently account for propagation delay and propagation delay variation associated with communications in the NTN. NTNs may manage (synchronize) radio frame timing structures of base stations (e.g., satellites) and user equipment (UEs) in the NTN. Further, UEs may determine timing advance (TA) values to be applied to UL transmissions based on their respective scheduling offset (e.g., offset in UL and DL radio frame timing structures), as well as based on propagation delay or round trip time (RTT). As such, served UEs may determine UL timing such that UL transmissions from the UEs to a satellite arrives at the satellite in a time synchronized manner. In other cases, a satellite may determine UL timing, based on reception timing, such that various UEs in the NTN may implement uniform UL and DL radio frame timing structures.

公开(公告)号：US20210282055A1

公开(公告)日：2021-09-09

申请号：US17184377

申请日：2021-02-24

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Kazuki Takeda ,  Peter Gaal

IPC: H04W28/22

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first rate matching resource indication that indicates that a first rate matching resource is available for use by the UE in reception of a downlink shared channel. The UE may also receive a second rate matching resource indication that indicates that a second rate matching resource is not available for use by the UE in reception of the downlink shared channel. The UE may identify a rate matching resource indication conflict arising from an overlap of at least one resource element included in both the first rate matching resource and the second rate matching resource. The UE may then resolve the rate matching resource indication conflict in accordance with a conflict resolution rule.

公开(公告)号：US20210258997A1

公开(公告)日：2021-08-19

申请号：US17154362

申请日：2021-01-21

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Kazuki Takeda ,  Xiaoxia Zhang ,  Peter Gaal ,  Alberto Rico Alvarino ,  Huilin Xu ,  Wanshi Chen

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may provide hybrid automatic repeat request (HARQ) feedback for multiple physical channels (e.g., multiple physical downlink shared channels (PDSCH)) scheduled via cross component carrier scheduling. A base station may transmit downlink control information (DCI) messages via physical downlink control channel (PDCCH), to the UE to schedule the multiple PDSCH over multiple component carriers. The UE may monitor for the multiple PDSCH over the multiple component carriers, respectively. The UE may identify resource allocations to use for HARQ feedback transmissions associated with the multiple PDSCH, based on the DCI messages received. The DCI may include a number of control fields that the UE may use to determine resource allocations to use for the HARQ feedback transmissions. The UE may thus improve coverage for wireless communications by supporting HARQ feedback for multiple PDSCH scheduled via cross component carrier.

公开(公告)号：US20210227410A1

公开(公告)日：2021-07-22

申请号：US17148544

申请日：2021-01-13

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Peter Pui Lok Ang ,  Seyedkianoush Hosseini ,  Krishna Kiran Mukkavilli ,  Hung Dinh Ly ,  Punyaslok Purkayastha ,  Yi Huang ,  Jing Lei

IPC: H04W24/08 ,  H04W72/12

Abstract: The present disclosure relates to physical downlink control channel (PDCCH) monitoring. For example, a method of wireless communication includes determining, by a user equipment (UE), whether one or more conditions is satisfied. The method also include performing, by the UE, physical downlink control channel (PDCCH) monitoring associated with a first cell based on a determination that the one or more conditions is satisfied. Other aspects and features are also claimed and described.

公开(公告)号：US11051327B2

公开(公告)日：2021-06-29

申请号：US16537422

申请日：2019-08-09

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Peter Gaal ,  Huilin Xu ,  Wanshi Chen ,  Tao Luo

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/14 ,  H04L5/00 ,  H04L5/10

Abstract: Rate-matching and channel estimation are disclosed for new radio (NR) user equipments (UEs). An NR UE obtains coexistence information of neighboring legacy operations including common reference signal (CRS) ports, CRS frequency pattern, and a legacy subframe type corresponding to the NR transmission segments. The NR UE determines legacy CRS occasion(s) coinciding with shared downlink direction operations for the NR and legacy operations, and rate-matches reception of NR downlink transmissions around the CRS occasion(s). In other aspects, an NR UE detects overlap of a downlink signal with downlink control channel candidate of a configured control resource set (CORESET). The UE ends monitoring of the candidate within a search space of the CORESET in response to the detected overlap, detects a collision between a scheduled demodulation reference signal (DMRS) and the downlink signal occasion, and discards all or part of the CORESET.

公开(公告)号：US11006408B2

公开(公告)日：2021-05-11

申请号：US16284462

申请日：2019-02-25

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Heechoon Lee ,  Huilin Xu

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described that support slot format determination for extended cyclic prefix (ECP) transmissions using normal cyclic prefix (NCP) slot formats. A slot format indicator (SFI) for NCP slots may identify transmission directions (e.g., uplink symbols, downlink symbols, or flexible symbols) for different symbols within a slot, and the SFI may provide an indication of a particular slot format that is to be used. Starting and ending times of each NCP symbol in a slot may be time domain mapped to starting and ending times of each ECP symbol in the slot. A transmission direction of each ECP symbol may be determined based at least in part on the transmission direction of at least a portion of at least one NCP symbol that fully or partially overlaps in the time domain with a corresponding ECP symbol.

公开(公告)号：US20210099991A1

公开(公告)日：2021-04-01

申请号：US17031869

申请日：2020-09-24

Applicant: QUALCOMM Incorporated

Inventor： Le Liu ,  Alberto Rico Alvarino ,  Huilin Xu ,  Seyedkianoush Hosseini ,  Peter Pui Lok Ang ,  Tingfang Ji ,  Krishna Kiran Mukkavilli

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

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth, or a reduced number of antennas, or a combination thereof for the UE. The UE may receive, based at least in part on the UE capability message, a downlink grant for downlink resources for a data transmission in accordance with a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a supported bandwidth part of the UE. The UE may monitor a wireless channel based at least in part on the downlink grant. The UE may receive the data transmission based at least in part on the monitoring of the wireless channel.

公开(公告)号：US10939427B2

公开(公告)日：2021-03-02

申请号：US16803700

申请日：2020-02-27

Applicant: QUALCOMM Incorporated

Inventor： Wei Yang ,  Peter Gaal ,  Huilin Xu ,  Joseph Binamira Soriaga

IPC: H04W4/00 ,  H04W72/04

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, information identifying one or more control channel monitoring span capabilities. The UE may receive, from the base station, information identifying a plurality of control channel monitoring occasions. The UE may generate a bitmap based at least in part on the plurality of control channel monitoring occasions. The UE may determine, in accordance with the bitmap and based at least in part on the information identifying the one or more control channel monitoring span capabilities, a span pattern indicating one or more locations of one or more spans in a slot. Numerous other aspects are provided.

公开(公告)号：US10931420B2

公开(公告)日：2021-02-23

申请号：US16526478

申请日：2019-07-30

Applicant: QUALCOMM Incorporated

Inventor： Jing Jiang ,  Joseph Binamira Soriaga ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Huilin Xu ,  Naga Bhushan ,  Raghuraman Krishnamoorthi ,  Peter Pui Lok Ang ,  John Edward Smee

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04L25/02 ,  H04L12/801

Abstract: Systems and techniques are disclosed to reduce pilot overhead by providing common reference signals coded with cover codes that are orthogonal in time and frequency domains. Common reference signals that are coded by cover codes orthogonal in both domains can be de-spread in both the time and frequency domains for improved resolution and larger pull-in windows for both. Also disclosed is semi-uniform pilot spacing in both the frequency and time domains. In a time domain, a first pilot symbol pair is spaced by a first time interval from each other and a second pilot symbol pair is spaced by a second time interval from the first pair, the second interval being greater than the first. In a frequency domain, a first set of pilot symbols is densely placed in a selected frequency band and a second set of pilot symbols is sparsely placed surrounding and including the selected frequency band.

公开(公告)号：US20210051730A1

公开(公告)日：2021-02-18

申请号：US16992678

申请日：2020-08-13

Applicant: QUALCOMM Incorporated

Inventor： Dan Zhang ,  Xiao Feng Wang ,  Peter Gaal ,  Jun Ma ,  Qiang Wu ,  Iyab Issam Sakhnini ,  Huilin Xu

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

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station by initiating a random access procedure with a two-root preamble. The UE may receive, from the base station, control signaling that indicates a set of root preamble sequences. The UE may transmit, to the base station, a preamble signal that is generated based on a first root preamble sequence and a second root preamble sequence of the set of root preamble sequences. The UE may then monitor for a preamble response based on the preamble signal. In some cases, the base station may be a base station in a terrestrial network. In other cases, the base station may be a satellite in a non-terrestrial network (NTN).