公开(公告)号：US11671867B2

公开(公告)日：2023-06-06

申请号：US17360689

申请日：2021-06-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Yisheng Xue ,  Tao Luo ,  Arthur Gubeskys ,  Shuanshuan Wu ,  Tien Viet Nguyen

IPC: H04W28/02 ,  H04W74/08 ,  H04W24/08 ,  H04W72/56

CPC classification number: H04W28/0289 ,  H04W24/08 ,  H04W28/0284 ,  H04W72/56 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment may determine parameters for congestion metrics based on a type for a channel access procedure associated with a sidelink transmission. The user equipment may determine a channel access procedure type for a sidelink channel transmission, and determine a limit for a channel occupancy (e.g., a channel occupancy ratio) based on the type. The user equipment may compare the channel occupancy with the limit to determine whether to transmit the sidelink channel transmission, based on whether the channel is available. In some aspects, the user equipment may additionally perform the channel access procedure (e.g., a listen before talk procedure) to determine whether to transmit the sidelink channel transmission. The user equipment may also perform channel measurements to obtain a congestion metric (e.g., a channel busy ratio) based on a threshold before transmitting the sidelink channel transmission.

公开(公告)号：US11665700B2

公开(公告)日：2023-05-30

申请号：US17125059

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Vinay Chande ,  Xiaoxia Zhang ,  Arumugam Chendamarai Kannan ,  Srinivas Yerramalli ,  Tao Luo ,  Juan Montojo ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04W72/14 ,  H04L5/00 ,  H04W74/08 ,  H04W72/0446 ,  H04L1/1812

CPC classification number: H04W72/14 ,  H04L1/1812 ,  H04L5/0055 ,  H04W72/042 ,  H04W72/0446 ,  H04W74/0808

Abstract: Aspects are provided which improve LBT by associating contention windows with transmission burst lengths and by allowing contention windows and maximum burst lengths to be adjusted based on interference activity. For downlink, a UE receives a PG for a downlink transmission from a base station indicating a CCA length based on a contention window size associated at least with a burst length for the downlink transmission. The UE performs, after receiving the pre-grant, a CCA based on the CCA length, transmits an APG to the base station when the CCA is successful, and receives the downlink transmission in response to the APG. For uplink, the base station performs a CCA based on a contention window associated at least with a burst length for an uplink transmission, transmits an uplink grant to the UE when the CCA is successful, and receives the uplink transmission in response to the uplink grant.

公开(公告)号：US11664860B2

公开(公告)日：2023-05-30

申请号：US17448474

申请日：2021-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/02 ,  H04B7/0456 ,  H04B7/0417

CPC classification number: H04B7/0456 ,  H04B7/0417

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support mechanisms for sidelink beamforming alignment over a set of resources based on a deterministic sequence in a wireless communication system. In aspects, an sidelink initiator user equipment (UE) may initiate a beamforming alignment procedure with a responder UE over a the sidelink. The initiator UE may define a set of subchannels specified by a deterministic sequence. The set of subchannels may be subchannels over which the initiator UE may perform reception beam sweeping. The deterministic sequence may be anchored to a direct frame number (DFN) of the sidelink frame without initial sensing, and may be determined via a sequence index, as a function of sidelink UE identification ID(s), or a combination thereof. In this manner, the number of bits for indicating the deterministic sequence to the responder UE may be reasonable, manageable, and/or moderate.

公开(公告)号：US11659523B2

公开(公告)日：2023-05-23

申请号：US16987064

申请日：2020-08-06

Applicant: QUALCOMM INCORPORATED

Inventor： Pravjyot Singh Deogun ,  Kapil Bhattad ,  Jing Sun ,  Mostafa Khoshnevisan ,  Xiaoxia Zhang ,  Ahmed Zaki ,  Gowrisankar Somichetty

IPC: H04W72/04 ,  H04W72/14 ,  H04L1/18 ,  H04L1/1812

CPC classification number: H04W72/04 ,  H04L1/1812 ,  H04W72/14

Abstract: Wireless communications systems and methods related to bandwidth part (BWP) switching after data communication are provided. A user equipment (UE) receives, from a base station (BS) in a first bandwidth part (BWP), one or more data bursts and BWP switching information. The UE switches from the first BWP to a second BWP based on the BWP switching information after receiving the one or more data bursts. The UE communicates, with the BS, a communication in the second BWP after the switching.

公开(公告)号：US20230155803A1

公开(公告)日：2023-05-18

申请号：US18056036

申请日：2022-11-16

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04L5/10 ,  H04L5/00 ,  H04W72/0446 ,  H04W72/0453 ,  H04W80/08 ,  H04W76/27 ,  H04W72/23 ,  H04W72/53

CPC classification number: H04L5/10 ,  H04L5/005 ,  H04W72/0446 ,  H04W72/0453 ,  H04W80/08 ,  H04W76/27 ,  H04W72/23 ,  H04W72/53 ,  H04L5/001

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for demodulation reference signal (DMRS) and cell specific reference signal (CRS) collision avoidance procedures for wireless communication. Conventional networks and devices may be unable to perform DMRS shifting in some modes. For example, when considering two transmissions of multiple TRP modes, if a DMRS symbol for one transmission is shifted due to a collision with a CRS pattern, the alignment of the transmissions may be altered. If DMRS symbols of the transmissions are not aligned, interference or decoding failure may occur. The disclosure enables procedures for performing DMRS shifting in multiple TRP modes. For example, the DMRS symbols of both transmissions may be shifted responsive to determining an overlap for one transmission. Such shifting may enable the alignment of the DMRS locations for both transmissions to enable decoding of the transmissions.

公开(公告)号：US11647539B2

公开(公告)日：2023-05-09

申请号：US17170232

申请日：2021-02-08

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Vinay Chande ,  Arumugam Chendamarai Kannan ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device may receive a clear channel assessment trigger from a second wireless device, the clear channel assessment trigger associated with a data transmission by the second wireless device. The first wireless device may transmit, based at least in part on a result of a first clear channel assessment procedure, feedback information for the clear channel assessment trigger. The first wireless device may receive the data transmission based at least in part on the feedback information for the first clear channel assessment procedure. The first wireless device may transmit, based at least in part on a result of a second clear channel assessment procedure, feedback information for the data transmission, wherein the first clear channel assessment procedure has a first duration that is longer than a second duration for the second clear channel assessment procedure.

公开(公告)号：US11647504B2

公开(公告)日：2023-05-09

申请号：US16719937

申请日：2019-12-18

Applicant: QUALCOMM incorporated

Inventor： Mostafa Khoshnevisan ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04W4/00 ,  H04W72/04 ,  H04L1/1867 ,  H04W72/044

CPC classification number: H04W72/0413 ,  H04L1/1887 ,  H04W72/042 ,  H04W72/044

Abstract: Methods, systems, and devices for wireless communications that support physical uplink control channel (PUCCH) carrying hybrid automatic repeat request (HARQ-A) for multiple transmission reception point (multi-TRP) environments with non-ideal backhaul links are described. A user equipment (UE) may support multiple communication links with TRPs and receive distinct physical downlink control channel (PDCCH) messages that include downlink control information (DCI). The DCI may include a timing or resource indication index values for physical uplink control channel (PUCCH) transmission. Based on the index values, the UE may differentiate the received DCI indications. The UE may then schedule PUCCH transmissions, including hybrid automatic repeat request (HARQ) payloads, directed to the TRPs. In some examples, the scheduling may include mapping the PUCCH transmissions to resources or resource groups in configured PUCCH resource set. The UE may then transmit the PUCCH messages via one or more determined beams based on the indication index values.

公开(公告)号：US11646912B2

公开(公告)日：2023-05-09

申请号：US17404828

申请日：2021-08-17

Applicant: QUALCOMM Incorporated

Inventor： Jung Ho Ryu ,  Sony Akkarakaran ,  Tao Luo ,  Junyi Li ,  Tianyang Bai ,  Xiaojie Wang ,  Xiaoxia Zhang ,  Jing Sun ,  Peter Gaal ,  Juan Montojo ,  Piyush Gupta ,  Wooseok Nam ,  Mahmoud Taherzadeh Boroujeni ,  Hua Wang ,  Lik Hang Silas Fong ,  Yan Zhou

IPC: H04L25/02 ,  H04W52/52 ,  H04W52/54

CPC classification number: H04L25/0222 ,  H04W52/52 ,  H04W52/54

Abstract: Apparatus, methods, and computer-readable media for facilitating phase jump estimation for SL DMRS bundling are disclosed herein. An example method includes receiving, from another device, first information at a first symbol of a first slot, the first slot including at least the first symbol and a first reference signal. The example method also includes receiving second information at a second symbol of a second slot, the second slot including at least the second symbol and a second reference signal, the first information and the second information being repetitions. The example method also includes generating a first reference signal copy based at least on the second reference signal and a phase jump between the first slot and the second slot. Additionally, the example method includes performing channel estimation across the first slot and the second slot based on an aggregation of the first reference signal and the first reference signal copy.

公开(公告)号：US20230135581A1

公开(公告)日：2023-05-04

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 ,  H04W72/04

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：US20230133900A1

公开(公告)日：2023-05-04

申请号：US17518403

申请日：2021-11-03

Applicant: QUALCOMM Incorporated

Inventor： Qian Zhang ,  Yan Zhou ,  Jing Sun ,  Tao Luo ,  Junyi Li ,  Navid Abedini

IPC: H04W72/12 ,  H04L5/14

Abstract: Methods, systems, and devices for wireless communications are described. A base station may identify an applicable restricted resource scheduling rule for restricting full-duplex operation on a first set of resources. The base station may transmit one or more control messages scheduling one or more full-duplex communications on a second set of resources based on the applicable restricted resource scheduling rule for restricting full-duplex operation on the first set of resources. In some examples, the second set of resources may overlap in time with the first set of resources. In other examples, the second set of resources may not overlap with the first set of resources in time or frequency. Accordingly, the base station may communicate the one or more full-duplex communications on the second set of resources. The described techniques may enable the base station to perform full-duplex communications with reduced interference and improved reliability.