公开(公告)号：US20210297205A1

公开(公告)日：2021-09-23

申请号：US17303660

申请日：2021-06-03

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei

IPC: H04L5/00 ,  H04W16/14 ,  H04W74/08 ,  H04W74/00 ,  H04W72/14 ,  H04W48/08

Abstract: Wireless communications systems and methods related to providing frequency diversity for communications in an unlicensed spectrum are provided. A first wireless communication device communicates, with a second wireless communication device, an opportunistic frequency-switching configuration for a first frequency band and a second frequency band. The first frequency band and the second frequency band are shared by a first network operating entity and a second network operating entity. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first frequency band based on the opportunistic frequency-switching configuration. The first wireless communication device switches from the first frequency band to a second frequency band based on the opportunistic frequency-switching configuration. The first wireless communication device communicates, with the second wireless communication device after the switching, a second communication signal in the second frequency band based on the opportunistic frequency-switching configuration.

公开(公告)号：US11129174B2

公开(公告)日：2021-09-21

申请号：US16581678

申请日：2019-09-24

Applicant: QUALCOMM Incorporated

Inventor： Piyush Gupta ,  Srinivas Yerramalli ,  Vinay Joseph ,  Junyi Li

IPC: H04H20/71 ,  H04W72/12 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit, and a UE may receive, via a configuration message, a group identifier indicating a group of UEs with which the UE is associated, the group of UEs being one of multiple groups of UEs which are each allocated resources. The base station may transmit the group downlink control information message to the group of UEs, and the UE may receive the group downlink control information message. The UE may determine that the group downlink control information message pertains to the UE by associating the group identifier with the group downlink control information message. The base station and the UE may communicate in accordance with the group downlink control information message based at least in part on the UE being associated with the group to which the group downlink control information message pertains.

公开(公告)号：US20210266962A1

公开(公告)日：2021-08-26

申请号：US17182508

申请日：2021-02-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described in which a transmitting device using shared radio frequency spectrum may perform a listen before talk (LBT) procedure for at least a minimum dwell time and, upon successful completion of the LBT procedure, may occupy the spectrum for up to a duration of a channel occupancy time (COT). The transmitting device may discontinue transmitting during the COT for a gap period, and resume transmitting subsequent to the gap period without performing another LBT procedure. The minimum dwell time may be based on a periodicity of a channel reservation signal transmitted by one or more other devices using the shared radio frequency spectrum. In some cases, the transmitting device may schedule one or more receiving devices with resources for transmissions during the COT, and the receiving devices may perform a LBT that is non-adjacent with an associated transmission.

公开(公告)号：US11038567B2

公开(公告)日：2021-06-15

申请号：US16241747

申请日：2019-01-07

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Kapil Bhattad ,  Jing Sun ,  Qingjiang Tian ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L1/16 ,  H04W74/08 ,  H04L5/00 ,  H04W72/04

Abstract: Wireless communications systems and methods related to performing adaptive autonomous uplink (UL) communications are provided. A first wireless communication device receives, from a second wireless communication device, an autonomous uplink transmission configuration. The first wireless communication device determines a transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration. The first wireless communication device transmits, to the second wireless communication device, an autonomous uplink communication signal based on the determined transmission parameter.

公开(公告)号：US20210160892A1

公开(公告)日：2021-05-27

申请号：US17163797

申请日：2021-02-01

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Chih-Hao Liu

IPC: H04W72/10 ,  H04W72/04 ,  H04W74/08

Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.

公开(公告)号：US11019504B2

公开(公告)日：2021-05-25

申请号：US16372917

申请日：2019-04-02

Applicant: QUALCOMM incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Jing Sun ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W16/26 ,  H04W74/08

Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.

公开(公告)号：US10999886B2

公开(公告)日：2021-05-04

申请号：US15232672

申请日：2016-08-09

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Srinivas Yerramalli ,  Durga Prasad Malladi ,  Yongbin Wei ,  Alexei Yurievitch Gorokhov ,  Brian Banister ,  Michael Lee McCloud ,  Tao Luo ,  Supratik Bhattacharjee ,  Chengjin Zhang ,  Ravi Teja Sukhavasi

IPC: H04W76/28 ,  H04L5/14 ,  H04L5/00 ,  H04B7/06 ,  H04W72/00 ,  H04W72/04 ,  H04W72/14 ,  H04L27/00

Abstract: Various aspects related to techniques for harmonization between common reference signal (CRS) and demodulation reference signal (DM-RS) based transmission modes (TMs) in unlicensed spectrum are described. In one aspect, a downlink/uplink (DL/UL) subframe configuration may be signaled for each subframe. Information provided by the DL/UL subframe configuration may indicate whether the respective downlink subframe is a single-frequency network (MBSFN) subframe (associated with DM-RS-based TM) or a non-MBSFN subframe (associated with CRS-based TM). In another aspect, periodic as well as aperiodic channel state information (CSI) reporting requests may be supported. In yet another aspect, discontinued reception (DRX) wake ups for unlicensed carriers may be explicitly or implicitly indicated to a user equipment (UE) via a carrier in a licensed spectrum.

公开(公告)号：US10959267B2

公开(公告)日：2021-03-23

申请号：US16046425

申请日：2018-07-26

Applicant: QUALCOMM INCORPORATED

Inventor： Aleksandar Damnjanovic ,  Andrei Dragos Radulescu ,  Tamer Kadous ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W74/00 ,  H04W48/16 ,  H04W56/00 ,  H04W72/12 ,  H04W16/14 ,  H04L5/00 ,  H04W48/12 ,  H04W16/28 ,  H04W88/08

Abstract: Random access channel (RACH) configurations for new radio (NR) shared spectrum (NR-SS) networks are disclosed. A base station may perform a listen before talk (LBT) procedure on a shared communication channel at a beginning of a discovery measurement timing configuration (DMTC) window. In response to a successful LBT, the base station may transmit synchronization signals over a plurality of directional beams according to a predetermined sequence. The user equipment (UE) may determine the predetermined sequence through the detected synchronization signals. The base station may signal configuration of additional random access resources when the LBT procedure delays beyond dedicated random access resources. The base station may then monitor for UEs to transmit random access signals from each direction corresponding to directional beams within the additional random access resources according to the predetermined sequence.

公开(公告)号：US10958404B2

公开(公告)日：2021-03-23

申请号：US15270720

申请日：2016-09-20

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Tao Luo ,  Wanshi Chen

IPC: H04L5/00 ,  H04W72/04 ,  H04W48/16 ,  H04W16/14

Abstract: The disclosure provides for receiving a downlink transmission for wireless communications. A user equipment (UE) may receive, on a primary component carrier, an indication that a subframe of a secondary component carrier includes a discovery reference signal. During the subframe, the UE may receive, on the secondary component carrier over an unlicensed spectrum, a transmission including the discovery reference signal. The UE may rate match the transmission based on the indication. The disclosure further provides for discovering timing information during wireless communications. The UE may receive on a primary component carrier, an indication that a set of subframes of a carrier of a neighboring cell includes a discovery reference signal. The UE may determine a subframe to receive the discovery reference signal based on the indication. The UE may receive during the subframe, the discovery reference signal from the neighboring cell in an unlicensed spectrum.

公开(公告)号：US20210083830A1

公开(公告)日：2021-03-18

申请号：US17001653

申请日：2020-08-24

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Sony Akkarakaran ,  Jing Sun ,  Taesang Yoo

IPC: H04L5/00 ,  H04W74/00

Abstract: Methods, systems, and devices for transmitting a positioning reference signal over a channel within a window including a set of positioning reference signal transmission opportunities. A device may identify the window and perform a channel access procedure to access the channel during the window. Based on performing the channel access procedure, the device may obtain access to the channel and determine that a portion of the positioning reference signal transmission opportunities are remaining within the window. The device may transmit a positioning reference signal during one or more of the remaining positioning reference signal transmission opportunities. In some cases, the device may refrain from transmitting a positioning reference signal during a portion of a positioning reference signal transmission opportunity even if the device gains access to the channel during that portion of the positioning reference signal transmission opportunity.