公开(公告)号：US10263818B2

公开(公告)日：2019-04-16

申请号：US15211162

申请日：2016-07-15

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo

IPC: H04W74/00 ,  H04L27/20 ,  H04L12/26 ,  H04W24/08 ,  H04W24/10 ,  H04W74/08 ,  H04W72/00 ,  H04L5/00 ,  H04L27/00

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a wireless device may identify a set of at least two wireless communications channels that are available for communication with another wireless device. In some examples, the wireless device may identify at least one channel of the set, and may select integrity check information that indicates the identified wireless channel(s) that are available. The wireless device may then transmit the integrity check information during a first time period. In some examples, a wireless device may receive wireless communication that includes integrity check information on a subset of channels. The wireless device may then determine, based on the integrity check information, whether the identified subset of channels is the same as the actual subset of channels used for transmission of the wireless communications.

公开(公告)号：US20190110317A1

公开(公告)日：2019-04-11

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: H04W74/08

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：US20190045548A1

公开(公告)日：2019-02-07

申请号：US16032517

申请日：2018-07-11

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Taesang Yoo ,  Kapil Bhattad ,  Jing Sun ,  Tao Luo ,  Yi Huang

IPC: H04W74/08 ,  H04L27/26 ,  H04L5/00 ,  H04B14/02

CPC classification number: H04W74/0833 ,  H04B7/17 ,  H04B14/026 ,  H04L5/0007 ,  H04L5/0017 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0053 ,  H04L27/2602 ,  H04L27/2613

Abstract: Wireless communications systems and methods related to communicating a sequence-based signal in a frequency spectrum are provided. A first wireless communication device obtains a configuration for communicating a sequence-based signal in the frequency spectrum. The configuration indicates resources in a frequency spectrum and a frequency distribution mode of the resources. The first wireless communication device communicates the sequence-based signal with a second wireless communication device in the frequency spectrum based on the configuration. The sequence-based signal includes at least one of a physical uplink control channel (PUCCH) signal or a physical random access channel (PRACH) signal. The frequency distribution mode indicates at least one of a frequency interlaced structure, a frequency comb structure, or a frequency mini-interlaced structure.

公开(公告)号：US10200904B2

公开(公告)日：2019-02-05

申请号：US15157612

申请日：2016-05-18

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Siddhartha Mallik ,  Srinivas Yerramalli ,  Taesang Yoo ,  Tao Luo

IPC: H04W24/10 ,  H04L5/00 ,  H04L27/00 ,  H04L12/24 ,  H04W24/08 ,  H04W72/08

Abstract: Measurement and demodulation may be impacted by varying transmit power due to varying numbers of carriers in a shared radio frequency (RF) spectrum band. Methods, systems, and devices are described for wireless communication. One method includes monitoring at least one carrier of a RF spectrum band for a first reference signal transmitted in a number of listen-before-talk (LBT) radio frames from a plurality of LBT radio frames associated with the plurality of carriers, where the plurality of LBT radio frames are received at the user equipment (UE) in different sets of at least one carrier of the RF spectrum band at different times, and where the first reference signal is associated with a first fixed transmit power; receiving a plurality of instances of the first reference signal; measuring the plurality of instances; and determining a cell measurement based at least in part on the measurements of the plurality of instances.

公开(公告)号：US20180376503A1

公开(公告)日：2018-12-27

申请号：US15950418

申请日：2018-04-11

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Taesang Yoo ,  Tamer Kadous

IPC: H04W74/08 ,  H04L27/26 ,  H04W72/04

CPC classification number: H04W74/0808 ,  H04L27/2605 ,  H04L27/2607 ,  H04L27/2646 ,  H04L27/2666 ,  H04W16/14 ,  H04W72/0406 ,  H04W72/0486

Abstract: An asynchronous channel reservation design is disclosed having a partial symbol alignment. The transmitting node performs a listen before talk (LBT) procedure on a transmission channel shared by one or more transmission/reception points (TRPs). Upon detecting passing the LBT, a preamble is transmitted followed by a dynamic length cyclic prefix that includes the normal cyclic prefix plus an additional variable period. The transmitter then transmits the channel reservation message after the dynamic length cyclic prefix. On the detector side, once the preamble is detected, the detecting node assumes a normal cyclic prefix before attempting to detect and decode the channel reservation information in the message. Using a demodulation reference signal (DMRS) in the channel reservation message, the detecting node may detect the channel reservation message information from the shifted version of the detected message.

公开(公告)号：US20180351591A1

公开(公告)日：2018-12-06

申请号：US15991722

申请日：2018-05-29

Applicant: QualComm Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04B1/10 ,  H04L5/14

CPC classification number: H04B1/1027 ,  H04B2001/1045 ,  H04B2001/1054 ,  H04L5/0091 ,  H04L5/1438 ,  H04L5/1469 ,  H04W16/14 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/082

Abstract: Cross-operator, cross-link adjacent channel interference with dynamic time division duplex (TDD) is discussed. For a network environment with co-site base stations, base stations attempting to switch the default direction to downlink may monitor for uplink reservations signals transmitted between the neighboring base stations in various ways. For example, the co-site base station may only monitor for an uplink reservation signal on its own channel or may attempt to monitor for the reservation signal in its own channel and adjacent channels. The adjacent base stations may transmit reservation signals in their own channel and the adjacent channels, so that the co-site base station would monitor for the communication intention by monitoring its own channel. Further, each network operator may be assigned a specific symbol location for the reservation signals. Still other aspects provide the neighboring base stations from different operators to pool the channels and transmit according to a shared spectrum.

公开(公告)号：US10149293B2

公开(公告)日：2018-12-04

申请号：US14861693

申请日：2015-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W76/27 ,  H04W72/08 ,  H04W72/14 ,  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：US10143005B2

公开(公告)日：2018-11-27

申请号：US14874160

申请日：2015-10-02

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L5/14 ,  H04L12/807 ,  H04W28/20 ,  H04W72/04 ,  H04W88/02

Abstract: Methods and apparatuses for managing uplink scheduling for one or more user equipment served by a network entity in a wireless communications system are presented. For instance, an example method is presented that includes generating, by the network entity, an uplink bandwidth allocation map, the uplink bandwidth allocation map defining an uplink bandwidth allocation for at least one of the one or more user equipment for at least one of a plurality of uplink transmission window lengths. In addition, the example method includes transmitting the uplink bandwidth allocation map to at least one of the one or more user equipment.

公开(公告)号：US20180337716A1

公开(公告)日：2018-11-22

申请号：US15955408

申请日：2018-04-17

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04B7/04 ,  H04L25/02 ,  H04B17/345

CPC classification number: H04B7/0404 ,  H04B7/0456 ,  H04B7/0691

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may obtain an interference and noise covariance matrix for a plurality of antennas of the UE. The UE may generate an approximated covariance matrix based on the inference and noise covariance matrix and a number of the antennas of the plurality of antennas associated with transmit operations at the UE. The number of the antennas associated with transmit operations at the UE may be fewer than a total number of the antennas. The UE may precode a sounding reference signal (SRS) using the approximated covariance matrix, and transmit the precoded SRS using the antennas associated with the transmit operations.

公开(公告)号：US20180331861A1

公开(公告)日：2018-11-15

申请号：US16041436

申请日：2018-07-20

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Dinkar Vasudevan ,  Seyedkianoush Hosseini ,  Jing Sun ,  Xiaoxia Zhang ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04L25/03 ,  H04L12/703 ,  H04L27/34 ,  H04L25/02 ,  H04B17/11 ,  H04B7/024 ,  H04B17/30 ,  H04B17/14 ,  H04B17/309

CPC classification number: H04L25/0398 ,  H04B7/024 ,  H04B17/11 ,  H04B17/14 ,  H04B17/30 ,  H04B17/309 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0242 ,  H04L25/03955 ,  H04L25/03987 ,  H04L27/3488 ,  H04L45/28

Abstract: Wireless communications systems and methods related to over-the-air uplink-downlink (UL-DL) reciprocity calibration. A central unit transmits downlink (DL) calibration reference signal (RS) and a calibration request. The central unit receives, in response to the calibration request, a first uplink (UL) calibration RS and a first DL channel estimate associated with a first transmission point (TP) and a first wireless communication device. The central unit transmits a DL coordinated multipoint (CoMP) joint transmission signal according to an uplink-downlink (UL-DL) reciprocity calibration. The UL-DL reciprocity calibration is based on at least a first UL channel estimate based on the first UL calibration RS, the first DL channel estimate, a second UL channel estimate associated with a second TP and the first wireless communication device, and a second DL channel estimate associated with the second TP and the first wireless communication device.