公开(公告)号：US20180302201A1

公开(公告)日：2018-10-18

申请号：US15725762

申请日：2017-10-05

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Xiaoxia Zhang ,  Seyed Ali Akbar Fakoorian ,  Ahmed Kamel Sadek ,  Siddhartha Mallik ,  Tamer Kadous

IPC: H04L5/00 ,  H04W74/08

Abstract: Sounding reference signal (SRS) transmission with implied request-to-send (RTS)/clear-to-send (CTS) operations is discussed. Two different types of SRS are defined, a legacy SRS associated with channel measurement sounding, and a contention SRS associated with contention resolution for medium sharing. The type of SRS may be distinguished based on the SRS resource associated with the particular type. Thus, legacy SRS are assigned to one SRS resource, while contention SRS are assigned to separate SRS resources. Therefore, when a neighbor node detects an SRS associated with the SRS resource for contention-type SRS, the neighbor node may know to refrain from transmission or to adjust or modify its communications depending on a spatial direction of the contention SRS.

公开(公告)号：US20180295523A1

公开(公告)日：2018-10-11

申请号：US15707824

申请日：2017-09-18

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04W16/14 ,  H04W72/04 ,  H04B17/318 ,  H04W74/08 ,  H04L5/00

Abstract: Inter-operator sounding reference signal (SRS) resource coordination is discussed in spatial divisional multiplex (SDM) coordinated multipoint (CoMP) operations. The higher priority operator conveys SRS resource reservation information identifying the fraction of resources it intends to use. The lower priority operator observes this resource reservation information and selects to reserve SRS resources from the remaining fraction of resources, if any, for scheduling its own users' SRS. The lower priority operator will transmit its own resource reservation information identifying the amount of SRS resources that it has identified for the non-priority use.

公开(公告)号：US20180288738A1

公开(公告)日：2018-10-04

申请号：US16001918

申请日：2018-06-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Juan Montojo ,  Taesang Yoo ,  Siddhartha Mallik ,  Andrei Dragos Radulescu ,  Chirag Sureshbhai Patel ,  Chengjin Zhang

IPC: H04W68/02 ,  H04W72/04 ,  H04W16/14 ,  H04W68/00 ,  H04W76/28 ,  H04W72/00 ,  H04W74/08 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W68/02 ,  H04W16/14 ,  H04W68/005 ,  H04W72/005 ,  H04W72/0453 ,  H04W74/0808 ,  H04W76/28 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

公开(公告)号：US10091766B2

公开(公告)日：2018-10-02

申请号：US14230464

申请日：2014-03-31

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Tao Luo ,  Hao Xu ,  Peter Gaal ,  Taesang Yoo ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W72/02 ,  H04W72/08 ,  H04J11/00 ,  H04L5/00

Abstract: A wireless user equipment (UE) may receive a downlink transmission from a base station in a first subframe of a first subframe configuration, and determine that a neighboring base station is operating according to a second subframe configuration. The UE may modify interference operations for the downlink transmission in the first subframe based on the determination to account for the neighboring base station operating according to the different subframe configuration. Modifying interference operations may include, for example, skipping interference operations, applying different interference operations to a subframe or a portion of a subframe, or a combination thereof. Modifying interference operations may be based on one or more characteristics of the neighboring base station communications.

公开(公告)号：US20180219642A1

公开(公告)日：2018-08-02

申请号：US15684495

申请日：2017-08-23

Applicant: Qualcomm Incorporated

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

IPC: H04J11/00 ,  H04L25/02 ,  H04W72/04 ,  H04W72/10 ,  H04W16/14

Abstract: Unified spatial operations for dynamic medium sharing is disclosed in which a non-priority transmitter detects a priority reservation reference signal (RRS) over a shared spectrum from a high-priority transmitter The shared spectrum is shared by the non-priority transmitter with at least one high-priority communication pair. The high-priority communication pair includes a high-priority transmitter and the high-priority receiver. After detecting the RRS, the non-priority transmitter generates a non-priority channel estimate for a first channel between the non-priority transmitter and a non-priority receiver and a priority channel estimate for a second channel between the non-priority transmitter and the priority receiver. The non-priority transmitter transmits data on the shared spectrum using a transmission precoder determined using the non-priority channel estimate and the priority channel estimate, wherein the transmission precoder aligns transmission of the data to minimize interference with the high-priority receiver.

公开(公告)号：US10003998B2

公开(公告)日：2018-06-19

申请号：US13797716

申请日：2013-03-12

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Hao Xu ,  Tao Luo ,  Peter Gaal ,  Taesang Yoo

IPC: H04W28/06 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26

CPC classification number: H04W28/06 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L27/2613 ,  H04W72/04 ,  H04W72/044 ,  H04W72/0453

Abstract: Systems and methods are disclosed which implement one or more overhead reduction technique, if channel conditions favorable to implementation of overhead reduction are present. The one or more overhead reduction technique may have one or more restriction corresponding to the channel for which the overhead reduction technique is implemented. The one or more overhead reduction technique implemented may include time-domain bundling, frequency-domain bundling, and pattern adaptation. Pattern adaptation may include pattern code-domain reduction, pattern timing-domain reduction, and pattern frequency-domain reduction.

公开(公告)号：US20180146381A1

公开(公告)日：2018-05-24

申请号：US15860442

申请日：2018-01-02

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Siddhartha Mallik ,  Xiaoxia Zhang ,  Jing Sun ,  Arumugam Chendamarai Kannan

IPC: H04W16/14 ,  H04L5/00 ,  H04L1/16 ,  H04W24/10 ,  H04W72/08 ,  H04W48/16 ,  H04L1/00 ,  H04W72/12 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04L1/0003 ,  H04L1/16 ,  H04L1/1861 ,  H04L5/0033 ,  H04L5/0048 ,  H04L5/0055 ,  H04L5/0057 ,  H04L5/0073 ,  H04W24/10 ,  H04W48/16 ,  H04W72/0453 ,  H04W72/085 ,  H04W72/1284

Abstract: Methods, systems, and devices are described for wireless communication. A device may use enhanced reporting mechanisms to support control information reporting on shared spectrum. In some cases, a device may utilize enhanced component carriers (eCCs) for data transmissions. In one example, the device may transmit control information (e.g., ACK/NACK, CSI, etc.) to a corresponding device using a CCA exempt transmission (CET). In another example, a device may report control information quasi-periodically. For instance, a device may be assigned a specified interval and a control feedback window for reporting control information (e.g., CSI). The window may provide a duration prior and subsequent to the specified interval during which a UE may transmit control information. For example, the device may perform a CCA reserving the channel for a duration that does not include the specified interval but may transmit feedback information based on determining the specified interval falls within the assigned window.

公开(公告)号：US20180132261A1

公开(公告)日：2018-05-10

申请号：US15608512

申请日：2017-05-30

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12

CPC classification number: H04W72/1231 ,  H04J2011/0016 ,  H04W72/1247 ,  H04W72/1263 ,  H04W74/0816

Abstract: Interference management with a coloring concept is discussed. A target transmitter may obtain a first priority schedule for a transmission opportunity of the target transmitter, wherein the first priority schedule identifies transmission priority for a plurality of base station groups. Each of the base station groups may include one or more base stations that are grouped according to various transmission criteria. The target transmitter will identify data for transmission and monitor the medium sensing slots corresponding to each of the base station groups for a medium reservation signal. The highest priority medium reservation signal may be determined out of any medium reservation signals detected during the monitoring, The highest priority medium reservation signal is determined according to the first priority schedule. Once identified, the data is transmitted by the target transmitter when the highest priority medium reservation signal corresponds to the target transmitter.

公开(公告)号：US20180131499A1

公开(公告)日：2018-05-10

申请号：US15637497

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/12 ,  H04W72/04

Abstract: Wireless communications systems and methods related to sharing a frequency-division duplexing (FDD) spectrum among multiple network operating entities. In one embodiment, a first wireless communication device communicates, with a second wireless communication device in a downlink (DL) frequency band, a reservation signal in a first channel sensing time slot of a frame to reserve a transmission time slot in the frame. The first wireless communication device communicates, in an uplink (UL) frequency band, an UL control signal in the first channel sensing time slot. The UL frequency band and the DL frequency band are shared by a plurality of network operating entities for frequency-division duplexing (FDD) communications. In another embodiment, a first wireless communication device communicates, in a first frequency band of a FDD network shared by a plurality of network operating entities, a reservation signal to reserve the first frequency band for time-division duplexing (TDD) communications.

公开(公告)号：US20180115448A1

公开(公告)日：2018-04-26

申请号：US15614317

申请日：2017-06-05

Applicant: QUALCOMM Incorporated

Inventor： Sridhar Ramanujam ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/12 ,  H04L27/28 ,  H04L25/02 ,  H04J3/06

CPC classification number: H04L27/2613 ,  H04J3/0605 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0236 ,  H04L27/2611 ,  H04L27/28 ,  H04W72/121

Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.