公开(公告)号：US20180070243A1

公开(公告)日：2018-03-08

申请号：US15644517

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04W16/14 ,  H04W74/08 ,  H04W4/00 ,  H04L5/14 ,  H04W76/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

公开(公告)号：US12238786B2

公开(公告)日：2025-02-25

申请号：US17943851

申请日：2022-09-13

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04L27/26 ,  H04L5/00 ,  H04W74/0833 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a transmission detection procedure on each base station before combining control information. The UE may use demodulation reference signals (DMRS) as a detection mechanism. If the UE detects a DMRS from a base station, the UE may determine that a control resource set associated with the base station is valid for combining. If the UE does not detect DMRS from the base station, the UE may refrain from combining control information from the base station. In another example, base stations that pass a listen-before-talk (LBT) procedure may transmit a preamble before transmitting control information. A preamble may carry a preamble sequence associated with a specific control resource set. The UE may identify a preamble sequence and determine that the corresponding control resource set is valid for control information combining.

公开(公告)号：US12212513B2

公开(公告)日：2025-01-28

申请号：US17452979

申请日：2021-10-29

Applicant: QUALCOMM INCORPORATED

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

IPC: H04L5/00 ,  H04W72/0446 ,  H04W72/20

Abstract: Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a first sidelink user equipment (UE) may include transmitting, to a second sidelink UE, at least one channel state information reference signal (CSI-RS) in a slot and transmitting, to the second sidelink UE, at least one sidelink synchronization signal block (S-SSB) in the slot, wherein an occupied channel bandwidth (OCB) associated with the slot satisfies a threshold based at least on the transmitting the at least one CSI-RS and the transmitting the at least one S-SSB.

公开(公告)号：US12200666B2

公开(公告)日：2025-01-14

申请号：US17727408

申请日：2022-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/02 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/20 ,  H04W92/18

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit signaling that includes an indication of a resource block set configuration to one or more sidelink UE, the resource block set configuration based at least in part on a type of sidelink communications to be performed and from a set of available resource block set configurations that comprises at least a minimum overlapping frequency resource block set configuration. The UE may perform the sidelink communications with the one or more sidelink UE according to the resource block set configuration.

公开(公告)号：US12200501B2

公开(公告)日：2025-01-14

申请号：US17406804

申请日：2021-08-19

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Peter Gaal ,  Juan Montojo

IPC: H04W16/14 ,  H04W72/20 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communications are described in which a first user equipment (UE) may transmit a first communication to a second UE during a first channel occupancy time (COT). The first UE may reserve resources of one or more subsequent COTs for one or more repetitions of the first communication. The reserved resources may be identified based at least in part on a two stage resource reservation, in which reserved resources are identified relative to a timing of the one or more subsequent COTs. Such a UE may first determine a timing of a second COT and may then determine a timing of the reserved resources based on the timing of the second COT. The reserved resources may be identified based at least in part on one or more offsets from a starting time of the second COT.

公开(公告)号：US12177843B2

公开(公告)日：2024-12-24

申请号：US17704910

申请日：2022-03-25

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/20

Abstract: Methods, systems, and devices for wireless communications are described to support resource block (RB) grid alignment at user equipments (UE) in sidelink communications. In a first example, communicating UEs may support different RB grids and a receiving UE may attempt multiple decoding hypotheses for receiving a sidelink control channel from a transmitting UE, where each hypothesis may correspond to a different RB grid. In a second example, an RB grid for a sidelink control channel may be common, or aligned, for a transmitting UE and a receiving UE, such that the receiving UE may receive the sidelink control channel using the common RB grid. In a third example, demodulation reference signals (DMRSs) and resource element (RE) rate matching for a sidelink control channel may be common, or aligned, for a transmitting UE and a receiving UE, such that the receiving UE may receive the control channel using the aligned DMRSs.

公开(公告)号：US12160877B2

公开(公告)日：2024-12-03

申请号：US17226732

申请日：2021-04-09

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Chih-Hao Liu ,  Jing Sun ,  Xiaoxia Zhang ,  Sony Akkarakaran

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/51 ,  H04W76/23 ,  H04W88/06

Abstract: A user equipment (UE) includes a receiver configured to receive, during operation based on a first mode, a configuration message from a base station. The configuration message indicates sidelink resources associated with a sidelink data channel. The UE further includes a transmitter configured to transmit, based on detecting that one or more conditions associated with the configuration message are satisfied, and during operation based on a second mode, a sidelink message to a second UE via the sidelink data channel during an occasion associated with the sidelink resources.

公开(公告)号：US12127167B2

公开(公告)日：2024-10-22

申请号：US17459833

申请日：2021-08-27

Applicant: QUALCOMM Incorporated

Inventor： Jung Ho Ryu ,  Lik Hang Silas Fong ,  Chih-Hao Liu ,  Jing Sun ,  Junyi Li ,  Tao Luo ,  Sony Akkarakaran

IPC: H04W72/04 ,  H04W4/46 ,  H04W72/02 ,  H04W72/0453 ,  H04W72/12 ,  H04W72/20 ,  H04W72/56

CPC classification number: H04W72/02 ,  H04W72/0453 ,  H04W72/20 ,  H04W72/56

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive a sidelink control indicator (SCI) from a second UE and selects resources and directions for communication. The SCI may include one or more resources and corresponding directions reserved by the second UE. The first UE may use the resources and directions indicated in the received SCI to select available resources with which to reserve forward direction transmissions, reverse direction transmissions, or both. For example, the first UE may avoid reserving resources and directions corresponding to the resources and directions indicated in the received SCI, or may reserve such resources despite receiving the SCI, such as if the received SCI has a relatively low reference signal received power (RSRP). The first UE may transmit an SCI indicating resources reserved by the first UE and associated directionalities.

公开(公告)号：US12114317B2

公开(公告)日：2024-10-08

申请号：US17158463

申请日：2021-01-26

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Shuanshuan Wu ,  Rajat Prakash ,  Sony Akkarakaran ,  Piyush Gupta

IPC: H04W72/23 ,  H04B7/06

CPC classification number: H04W72/23 ,  H04B7/0626

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmit (Tx) user equipment (UE) may receive, from a base station, downlink control information (DCI) that triggers sidelink channel state information (CSI) reporting from a receive (Rx) UE to the Tx UE. The Tx UE may transmit, to the Rx UE, a request for CSI based at least in part on the DCI received from the base station. The Tx UE may receive, from the Rx UE, a CSI report based at least in part on the request. The Tx UE may transmit, to the base station, the CSI report received from the Rx UE. Numerous other aspects are described.

公开(公告)号：US12096476B2

公开(公告)日：2024-09-17

申请号：US17445125

申请日：2021-08-16

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Chih-Hao Liu ,  Peter Gaal ,  Tao Luo

IPC: H04W74/0816 ,  H04W72/02 ,  H04W72/0446 ,  H04W80/02 ,  H04W92/18

CPC classification number: H04W74/0816 ,  H04W72/02 ,  H04W72/0446 ,  H04W80/02 ,  H04W92/18

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine candidate resources on one or more physical sidelink shared channels (PSSCHs) that are clear for transmitting at least two transport blocks, based at least in part on sensing a plurality of subchannels on the one or more PSSCHs with respect to listen-before-talk completion instants for the at least two transport blocks. The UE may select, from among the candidate resources, transmit resources on the one or more PSSCHs for transmitting the at least two transport blocks such that the at least two transport blocks are transmitted in one of: different subchannels of a same slot, or contiguous slots of a same subchannel. The UE may transmit the at least two transport blocks in the transmit resources. Numerous other aspects are provided.