公开(公告)号：US20190305834A1

公开(公告)日：2019-10-03

申请号：US16447280

申请日：2019-06-20

Applicant: Qualcomm Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04B7/0456 ,  H04B7/022 ,  H04B7/08 ,  H04B7/00

Abstract: Reference signal and transmitter (Tx)/receiver (Rx) precoding for user equipment (UE) multiplexing in new radio (NR) shared spectrum networks is discussed. In certain reference signals, a base station may schedule multiple UEs for transmission of uplink reference signals within an identified subframe. The base station may transmit a reference signal configuration message, wherein the reference signal configuration message includes a transmission sequence identifier identifying a multiplexing for antenna ports assigned for transmission of the uplink reference signals. The multiplexing may be one or both of frequency divisional multiplexing (FDM) and time division multiplexing (TDM) over the identified subframe. Additional reference signals, transmit precoders may be identified by the base station based on channel inversion calculations of the channel matrix determined based on uplink reference signals.

公开(公告)号：US10341884B2

公开(公告)日：2019-07-02

申请号：US15182273

申请日：2016-06-14

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tao Luo ,  Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04W24/02 ,  H04L27/26 ,  H04W28/04 ,  H04W24/08 ,  H04W74/06 ,  H04W28/02 ,  H04W74/00 ,  H04B7/06 ,  H04W74/08 ,  H04W72/08

Abstract: Channel clearance using a shared radio frequency spectrum band may be performed for both a base station and a user equipment (UE). A base station may perform a listen before talk (LBT) procedure and verify one or more channels in a shared radio frequency spectrum band are available for transmissions and, if the LBT procedure is successful, transmit a pre-grant transmission to one or more UEs. The UEs may perform an LBT procedure for channel(s) indicated in the pre-grant transmission. If the UE LBT procedure passes, the UE may transmit a channel clearance signal, and may transmit a feedback communication responsive to the pre-grant transmission. The feedback communication may indicate, for example, the pre-grant transmission was received and which of the one or more channels are available based on the LBT procedure. The base station may receive the feedback communication and initiate transmissions to the UE.

公开(公告)号：US20190124518A1

公开(公告)日：2019-04-25

申请号：US16227121

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Siddhartha Mallik ,  Taesang Yoo ,  Juan Montojo ,  Aleksandar Damnjanovic ,  Junyi Li

IPC: H04W16/14 ,  H04W74/08 ,  H04L5/00 ,  H04L5/26

Abstract: Wireless communications systems and methods related to reservation signal transmission and detection for spectrum sharing are provided. A first wireless communication device communicates, with a second wireless communication device, a reservation request (RRQ) signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the shared spectrum is shared by a plurality of network operating entities, and wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of the plurality of network operating entities. The first wireless communication device transmits a reservation response (RRS) signal indicating an interference tolerance level of the first wireless communication device.

公开(公告)号：US10270579B2

公开(公告)日：2019-04-23

申请号：US15012560

申请日：2016-02-01

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Taesang Yoo ,  Siddhartha Mallik ,  Jelena Damnjanovic

IPC: H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04

Abstract: Methods, systems, and devices are described for wireless communication. Wireless devices may exchange data using Medium Access Control (MAC) layer units known as transport blocks which may include a number of code blocks (CBs). A receiving device may attempt to decode each CB and send acknowledgement (ACK) and negative-acknowledgment (NACK) feedback to the transmitting device based on the whether each CB was successfully decoded. The receiving device may determine a format from two or more available formats for transmitting the ACK/NACK feedback. The format for the ACK/NACK feedback may be determined based at least in part on a number of CBs received and a number of CBs that have a NACK feedback. ACK/NACK feedback may be provided on an individual CB basis, or for bundles of CBs. The transmitting device may perform blind decoding of the received feedback to determine the ACK/NACK format and CBs that have NACK feedback.

公开(公告)号：US20190104547A1

公开(公告)日：2019-04-04

申请号：US16141616

申请日：2018-09-25

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Siddhartha Mallik ,  Aleksandar Damnjanovic

IPC: H04W74/08 ,  H04W16/14 ,  H04B7/0413 ,  H04B7/06

Abstract: Improvements to asynchronous spatial listen before talk (LBT) procedures are disclosed. In a shared spectrum network spatial LBT procedures are used for directionally targeting the channel reservation process. Prior to transmitting channel reservation signaling, the transmitter and receiver determine an effective interference considering available multiple input, multiple output (MIMO) configuration information. When the effective interference exceeds a predefined threshold, the node may without transmission of its channel reservation signal. Otherwise, when the effective interference remains within the threshold, each node's transmitted channel reservation signal may also identify at least a beamforming matrix either as payload or used to precede the node's channel reservation signal.

公开(公告)号：US20190098663A1

公开(公告)日：2019-03-28

申请号：US16049313

申请日：2018-07-30

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to considering channel variations for medium sharing in a spatial domain are provided. A first wireless communication device transmits one or more reservation response signals indicating spatial channel information in response to a reservation request for a transmission opportunity (TXOP) in a frequency spectrum. The first wireless communication device receives, from a second wireless communication device, a communication signal from a first spatial subspace during the TXOP based on the reservation request. In one embodiment, the first wireless communication device may repeat a transmission of the reservation response signal after transmitting a portion of the communication signal. In another embodiment, the first wireless communication device may include a channel variation parameter in the reservation response signal.

公开(公告)号：US20190090239A1

公开(公告)日：2019-03-21

申请号：US16196622

申请日：2018-11-20

Applicant: QUALCOMM Incorporated

Inventor： Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Taesang Yoo ,  Siddhartha Mallik ,  Madhavan Srinivasan Vajapeyam ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04W72/04 ,  H04W76/27 ,  H04L5/00 ,  H04W72/14 ,  H04W72/08 ,  H04W88/08

Abstract: Techniques are described for preempting resource allocations to one or more UEs in the event that delay sensitive data is received. A resource allocation of a number of symbols may be granted to a first user equipment (UE) for first associated data to be transmitted. Subsequently, data may be received for a second UE that is more delay sensitive than the first data. The resource allocation to the first UE may be preempted, and resources allocated to the second UE for the second data within a variable length transmission time interval (TTI) of the resource allocation to the first UE. UEs may monitor for preemption during transmissions to other UEs in order to receive new resource grants associated with the preempted resource grant. Whether a UE monitors transmissions for preemption may be determined based on a quality or service (QoS) of the UE.

公开(公告)号：US10206117B2

公开(公告)日：2019-02-12

申请号：US15654299

申请日：2017-07-19

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Siddhartha Mallik ,  Juan Montojo ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04W16/14 ,  H04W72/12 ,  H04B17/309 ,  H04W72/08 ,  H04W74/08 ,  H04W56/00

Abstract: Certain aspects of the present disclosure provide techniques for accessing shared spectrum in new radio (NR). An apparatus of a first operator may determine a synchronization configuration for the first operator and at least a second operator that share spectrum, identify, based on the synchronization configuration, at least a first channel reserved for contending for access to the spectrum, and reserve the access to the spectrum in the first channel to access at least a second channel for communications.

公开(公告)号：US10136452B2

公开(公告)日：2018-11-20

申请号：US15050404

申请日：2016-02-22

Applicant: QUALCOMM Incorporated

Inventor： Zhengwei Liu ,  Xiaoxia Zhang ,  Wanshi Chen ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Onkar Jayant Dabeer

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

Abstract: Additional improvements to the design of enhanced physical random access channel (ePRACH) procedures are disclosed for communications systems having contention-based shared spectrum including unlicensed frequency bands. The additional improvements address the uncertainty of transmission in listen before talk (LBT)-based communications and cooperation with other radio access technologies competing for the same frequency spectrum.

公开(公告)号：US10123323B2

公开(公告)日：2018-11-06

申请号：US14862997

申请日：2015-09-23

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Taesang Yoo ,  Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Arumugam Chendamarai Kannan ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W72/14 ,  H04W72/04 ,  H04L5/00

Abstract: Various aspects described herein relate to communicating using dynamic uplink and downlink transmission time interval (TTI) switching in a wireless network. A notification can be received from a network entity of switching a configurable TTI from downlink communications to uplink communications. The configurable TTI can be one of a plurality of TTIs in a frame structure that allows dynamic switching of configurable TTIs between downlink and uplink communications within a frame. Additionally, uplink communications can be transmitted to the network entity during the configurable TTI based at least in part on the notification.