公开(公告)号：US11582749B2

公开(公告)日：2023-02-14

申请号：US14789301

申请日：2015-07-01

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Tao Luo ,  Aleksandar Damnjanovic ,  Yongbin Wei ,  Madhavan Srinivasan Vajapeyam ,  Wanshi Chen

IPC: H04W72/04 ,  H04W48/16 ,  H04L5/00 ,  H04W48/20 ,  H04W48/12

Abstract: Techniques for transmitting and receiving wireless communications over an unlicensed radio frequency spectrum band are disclosed, including techniques for transmitting and receiving service information blocks over the unlicensed radio frequency spectrum band, techniques for gaining access to the unlicensed radio frequency spectrum band by performing extended clear channel assessments (eCCAs), techniques for transmitting and receiving synchronization signals and reference signals over the unlicensed radio frequency spectrum band, techniques for communicating locations of reference signals, and techniques for communicating availability of certain resources to be combined across multiple different transmissions.

公开(公告)号：US11558230B2

公开(公告)日：2023-01-17

申请号：US16563263

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Shimman Arvind Patel ,  Juan Montojo ,  Hao Xu ,  Aleksandar Damnjanovic

IPC: H04L27/26 ,  H04L1/18 ,  H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04W72/08

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may identify an uplink/downlink (UL/DL) configuration that defines subframe configuration options for each subframe of a frame. For example, the UL/DL configuration may establish parameters for time division duplexing (TDD) operation between a base station and a user equipment (UE). The wireless device (e.g., the UE or base station) may determine a constraint for a subframe of the frame based on the UL/DL configuration and then determine an adaptive subframe configuration based on the constraint. The adaptive subframe configuration may include one or several downlink symbol periods and one or several uplink symbol periods. The wireless device may then communicate during the subframe according to the adaptive subframe configuration rather than the original UL/DL configuration; and, because the adaptive subframe may be constrained by the identified UL/DL configuration, the communication during the subframe may avoid disruption to UEs.

公开(公告)号：US20230008727A1

公开(公告)日：2023-01-12

申请号：US17370563

申请日：2021-07-08

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Andrei Dragos Radulescu ,  Mostafa Khoshnevisan ,  Yan Zhou ,  Tao Luo ,  Xiaoxia Zhang ,  Jelena Damnjanovic ,  Rajat Prakash ,  Juan Montojo

IPC: H04W36/30 ,  H04B7/06 ,  H04W88/04

Abstract: Methods, systems, and devices for wireless communications are described. A first device may cooperate with a second device to form a virtual device configured to communicate with a radio access network. The virtual device may appear as a single device from the perspective of the radio access network. Subsequently, a third device may be identified for replacing the second device within the virtual device. Based on the third device being identified, procedures for handing over communications from the second device to the third device may be executed. The procedures may include a beam management procedure, a random-access procedure, a mobility management procedure, or any combination thereof.

公开(公告)号：US11523431B2

公开(公告)日：2022-12-06

申请号：US16990724

申请日：2020-08-11

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Jing Sun ,  Yongbin Wei

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/04

Abstract: Certain aspects of the present disclosure provide techniques for reuse one channel access for new radio communications in unlicensed spectrum. A method that may be performed by a first base station (BS) includes occupying a bandwidth, based on a category 4 (CAT4) listen before talk (LBT) procedure on the bandwidth, wherein the CAT4 LBT procedure is based on a first contention window (CW); arranging a category 2 (CAT2) LBT occasion for the bandwidth during a channel occupancy time (COT) for the bandwidth; and receiving an indication that at least a second BS has occupied the bandwidth during the CAT2 LBT occasion.

公开(公告)号：US11503559B2

公开(公告)日：2022-11-15

申请号：US16401876

申请日：2019-05-02

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Yongbin Wei ,  Srinivas Yerramalli ,  Tamer Kadous ,  Andrei Dragos Radulescu

IPC: H04W56/00 ,  H04B17/318 ,  H04B17/364 ,  H04B17/10

Abstract: Cell acquisition is disclosed in frequency diversity configured for frame based equipment (FBE) access, such as using opportunistic frequency switching. A user equipment (UE) begins cell acquisition by synchronizing to an available communication channel of an available cell in response to detection of a synchronization signal block (SSB) associated with a network on which the UE communicates. The UE receives system information associated with the available cell from a serving base station, wherein the system information includes identification of at least: a link indicator identifying linked communication channels available for opportunistic switching, sensing occasion offsets for each of the linked channels, and access information associated with each of the linked channels. The UE measures a channel quality for each available channel. The base station transmits this system information on each of the linked channels and then monitors the allocated random access resources for signals from the UEs.

公开(公告)号：US11470664B2

公开(公告)日：2022-10-11

申请号：US16866788

申请日：2020-05-05

Applicant: QUALCOMM Incorporated

Inventor： Naga Bhushan ,  Durga Prasad Malladi ,  Yongbin Wei ,  Peter Gaal ,  Tao Luo ,  Tingfang Ji ,  Gavin Bernard Horn ,  Wanshi Chen ,  Aleksandar Damnjanovic

IPC: H04L1/00 ,  H04L27/26 ,  H04L5/14 ,  H04L27/00 ,  H04W76/15 ,  H04L5/00 ,  H04W48/10 ,  H04W72/08 ,  H04W74/00 ,  H04L1/06 ,  H04W28/02 ,  H04W74/08 ,  H04W24/02 ,  H04W28/08 ,  H04W28/16 ,  H04W72/04 ,  H04W56/00 ,  H04W74/04 ,  H04W16/14 ,  H04W88/06 ,  H04W88/08 ,  H04W84/12 ,  H04J11/00 ,  H04W88/02

Abstract: Methods and apparatuses are described for wireless communications. A first method includes transmitting a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal to a wireless node in a licensed spectrum, and transmitting, concurrently with the transmission of the first OFDMA communications signal, a second OFDMA communications signal to the wireless node in an unlicensed spectrum. A second method includes receiving a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal from a wireless node in a licensed spectrum, and receiving, concurrently with the reception of the first OFDMA communications signal, a second OFDMA communication signal from the wireless node in an unlicensed spectrum. A third method includes generating a periodic gating interval for a cellular downlink in an unlicensed spectrum, and synchronizing at least one boundary of the periodic gating interval with at least one boundary of a periodic frame structure associated with a primary component carrier of the cellular downlink.

公开(公告)号：US11470642B2

公开(公告)日：2022-10-11

申请号：US17301028

申请日：2021-03-22

Applicant: QUALCOMM INCORPORATED

Inventor： Yisheng Xue ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Chih-Hao Liu ,  Yongbin Wei

IPC: H04W74/08 ,  H04W52/36 ,  H04W16/14 ,  H04W56/00

Abstract: Wireless communications systems and methods related to channel access with variable energy detection thresholds in a shared radio frequency band are provided. A wireless communication device, performs a listen-before-talk (LBT) procedure to contend for a maximum channel occupancy time (MCOT) in a first shared radio frequency band, the performing the LBT including performing, in the first shared radio frequency band, first channel sensing during a first portion of an LBT period based on a first energy detection threshold; and performing, in the first shared radio frequency band based on the first channel sensing, second channel sensing during a second portion of the LBT period based on a second energy detection threshold different from the first energy detection threshold; and communicating, in the first shared radio frequency band, a communication signal during the MCOT based on the LBT procedure.

公开(公告)号：US11452085B2

公开(公告)日：2022-09-20

申请号：US16941294

申请日：2020-07-28

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Jing Sun ,  Qingjiang Tian ,  Yongbin Wei

IPC: H04W72/04 ,  H04W74/08 ,  H04W16/14

Abstract: Certain aspects of the present disclosure provide techniques for new radio (NR) communications in narrowband regions of unlicensed spectrum. A method that may be performed by a user equipment (UE) includes determining, using an energy detector (ED), that received energy in a first bandwidth (BW) is lower than a threshold; and transmitting, in response to determining that received energy in the first BW is lower than the threshold, a first uplink (UL) transmission to a base station (BS) in a second BW smaller than the first BW and contained within the first BW.

公开(公告)号：US11452075B2

公开(公告)日：2022-09-20

申请号：US17007226

申请日：2020-08-31

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Aleksandar Damnjanovic ,  Juan Montojo

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04W88/04

Abstract: Certain aspects of the present disclosure relate to techniques for assigning resources for common reference signal (CRS) transmissions from user equipment (UE) relays. Aspects of the present disclosure provide techniques to use minimum possible resources for transmission of CRS in an attempt to reduce interference, reduce power consumption while providing appropriate reference for channel measurement and demodulation. In an aspect, a wireless node (e.g., a UE relay station) may determine resources for transmission of CRS in a subframe based, at least in part, on a type of one or more channels to be transmitted in the subframe, and may transmit the CRS using the determined resources.

公开(公告)号：US11432325B2

公开(公告)日：2022-08-30

申请号：US16924584

申请日：2020-07-09

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Jing Sun ,  Aleksandar Damnjanovic ,  Yongbin Wei

IPC: H04W4/00 ,  H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04W76/27 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communication are described. A base station may determine a configuration for UE-to-UE sharing of a channel occupancy time (COT) and may transmit the configuration to a UE to indicate that it can share a UE-acquired COT with at least another UE. A UE may acquire a COT using a listen-before-talk (LBT) procedure, and if successful, may transmit a signal indicating that the COT is being shared with at least another UE. Additionally, a UE may receive a signal from another UE indicating that it has acquired a COT in a shared spectrum and that the COT is being shared with other UEs. The UE may perform a shortened LBT procedure within the COT, and if successful, may transmit an uplink transmission in the shared spectrum.