公开(公告)号：US10833760B2

公开(公告)日：2020-11-10

申请号：US16531538

申请日：2019-08-05

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W72/00 ,  H04B7/26 ,  H01Q1/24 ,  H04B7/0491 ,  H04W72/08 ,  H04W16/24 ,  H04W8/00 ,  H04W16/14 ,  H04W4/70 ,  H04W36/30 ,  H04B7/06 ,  H04W36/06 ,  H04W48/18 ,  H04W88/04 ,  H04W74/08 ,  H04W88/06

Abstract: Described techniques provide for switching a user equipment (UE) between different coverage enhancement (CE) modes, such as between a non-CE mode and a CE mode. A UE may determine that a CE mode switch is to be performed and may initiate the mode switching. The UE may compare signal qualities of signals from one or more base stations against one or more threshold values and determine that a switch from a CE mode to a non-CE mode, or from a non-CE to CE mode, is to be performed. In some cases, a UE may be in idle mode and switch between CE modes, or may perform a cell reselection to a different base station. In other cases, a UE may be in connected mode and may declare a radio link failure to initiate a mode switch. A base station may initiate mode switching based on radio link monitoring of UEs.

公开(公告)号：US10772110B2

公开(公告)日：2020-09-08

申请号：US16155515

申请日：2018-10-09

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei ,  Zhifei Fan ,  Jing Sun ,  Aleksandar Damnjanovic ,  Bin Tian

IPC: H04W72/12 ,  H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W84/12

Abstract: Wireless communications systems and methods related to signaling medium reservation information medium sharing among multiple radio technologies (RATs) are provided. A wireless communication device of a first RAT detects a channel reservation signal of a second RAT in a spectrum shared by the first RAT and the second RAT. The wireless communication device determines whether the channel reservation signal indicates a first transmission opportunity (TXOP) duration or a second TXOP duration that is different from the first TXOP duration. The wireless communication device selects, based on the determination, at least one of performing a backoff or continuing to monitor the spectrum.

公开(公告)号：US10764920B2

公开(公告)日：2020-09-01

申请号：US16170438

申请日：2018-10-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Farhad Meshkati ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/00 ,  H04L5/00 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a semi-persistent scheduling (SPS) configuration message from a base station, the SPS configuration message containing at least one SPS parameter for downlink SPS communications over a shared radio frequency spectrum band. The UE may identify, based on the SPS configuration, one or more subframes or slots allocated for the downlink SPS communications. The UE may perform the downlink SPS communications during the one or more subframes or slots and according to the SPS configuration.

公开(公告)号：US10728928B2

公开(公告)日：2020-07-28

申请号：US16129473

申请日：2018-09-12

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Tamer Kadous

IPC: H04W4/00 ,  H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to performing random backoff over multiple spatial dimensions in spatial listen-before-talk (LBT) procedures are provided. A first wireless communication device determines a first backoff counter for contending for a transmission opportunity (TXOP) in a communication medium over a first spatial subspace. The first wireless communication device detects a transmission in the TXOP within the first spatial subspace. The first wireless communication device determines a second backoff counter for contending for the TXOP over a second spatial subspace that is different from the first spatial subspace based on the detecting. The second spatial subspace is part of the first spatial subspace and the detected transmission is in a different spatial subspace than the second spatial subspace.

公开(公告)号：US10728913B2

公开(公告)日：2020-07-28

申请号：US16401979

申请日：2019-05-02

Applicant: Qualcomm Incorporated

Inventor： Xiaoxia Zhang ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Yongbin Wei ,  Tamer Kadous ,  Jing Sun

IPC: H04W72/12 ,  H04W88/06 ,  H04B7/024 ,  H04B7/0413 ,  H04L27/26 ,  H04W16/14 ,  H04L1/00

Abstract: Wireless communications systems and methods related to serving user equipment devices (UEs) using multi-transmission/reception point (TRP) techniques with dynamic varying TRP clusters are provided. A wireless communication device receives, from a first group of one or more TRPs, a first signal during a first time period. The wireless communication device receives, from a second group of one or more TRPs, a second signal during a second time period, wherein at least one TRP in the second group is not in the first group. The first signal may include a first transport block (TB) and the second signal may include a second TB different from the first TB. Alternatively, the first signal may include a first portion of a TB and the second signal includes a second portion of the TB different from the first portion.

公开(公告)号：US10700802B2

公开(公告)日：2020-06-30

申请号：US15898981

申请日：2018-02-19

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Chirag Sureshbhai Patel ,  Tao Luo ,  Tamer Kadous

IPC: H04J11/00 ,  H04L5/00 ,  H04W48/16 ,  H04B7/06 ,  H04W16/14 ,  H04L5/14

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure bursts of synchronization signal (SS) blocks for discovery reference signal (DRS) transmission. The base station may transmit an SS block set in an SS burst according to a beam sweep pattern, which may be repeated for a subsequent SS block set. The base station may configure a number of SS block sets in each SS burst and transmit each SS block in an SS block set using a different beam. Each SS burst may be transmitted according to a different beam sweep pattern and the base station may repeat transmission of SS bursts according to a DRS repetition periodicity. A user equipment (UE) may sweep through antenna sub-arrays during reception of an SS burst to determine a suitable sub-array for communication.

公开(公告)号：US10687359B2

公开(公告)日：2020-06-16

申请号：US15987511

申请日：2018-05-23

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

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

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems utilizing shared radio frequency spectrum bands, base stations may operate in different listen before talk (LBT) modes. For example, a base station may operate in an LBT enabled mode or a non-LBT enabled mode. A UE may perform system acquisition with the base station based on receiving acquisition signals (e.g., synchronization signals and physical broadcast channel (PBCH) signals) from the base station. These acquisition signals may depend on the LBT mode of the base station. For example, the frame timing and number of subframes for the acquisition signals may be based on the LBT mode of the base station. In some cases, a base station may adaptively switch LBT modes, and the UE may re-synchronize with the base station based on an LBT configuration period or a paging message from the base station.

公开(公告)号：US10687356B2

公开(公告)日：2020-06-16

申请号：US16053154

申请日：2018-08-02

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04W28/26 ,  H04W74/00 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may obtaining channel access after a clear channel assessment (CCA) operation. The transmitting device may then determine an offset between a boundary of a symbol and a particular time at which the channel access is obtained. The transmitting device may generate a channel reservation (CR) preamble based on the offset and transmit the CR preamble. The transmitting device may also generate the CR preamble based on occupancy of sub-bands or beams used by the transmitting device. A receiving device may monitor for a CR message based on the CR preamble.

公开(公告)号：US10673676B2

公开(公告)日：2020-06-02

申请号：US16030348

申请日：2018-07-09

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04L27/36 ,  H04B7/0408 ,  H04L27/34 ,  H04B7/0452 ,  H04B7/06 ,  H04L27/26 ,  H04B7/10 ,  H04L27/38 ,  H04W16/28 ,  H04W72/04 ,  H04J14/06 ,  H04L5/00 ,  H04J3/02

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. More particularly, aspects of the present disclosure provide multiplexing schemes which may be suited for the single carrier waveform. For example, some techniques and apparatuses described herein permit multiplexing of multiple, different data streams without destroying the single-carrier properties of the waveform. Additionally, or alternatively, some techniques and apparatuses described herein may provide unequal error protection, unequal bandwidth allocation, and/or the like as part of the multiplexing schemes. Examples of multiplexing schemes described herein include in-phase/quadrature (I/Q) multiplexing, superposition quadrature amplitude modulation (QAM) based at least in part on layered bit mapping, polarization division multiplexing of QAM with superposition coding, and frequency division multiplexing using UE-specific beams.

公开(公告)号：US10595327B2

公开(公告)日：2020-03-17

申请号：US16383541

申请日：2019-04-12

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Sadek ,  Nachiappan Valliappan ,  Tamer Kadous ,  Chirag Patel ,  Tao Luo

IPC: H04W72/12 ,  H04W16/14 ,  H04L5/00 ,  H04W72/04 ,  H04L5/14 ,  H04W74/08 ,  H04W84/12

Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.