公开(公告)号：US10715301B2

公开(公告)日：2020-07-14

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 ,  H04W16/14 ,  H04W74/08 ,  H04L5/14 ,  H04L5/00 ,  H04W72/04 ,  H04W74/00

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：US10701644B2

公开(公告)日：2020-06-30

申请号：US15615451

申请日：2017-06-06

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00 ,  H04W52/40 ,  H04W52/42 ,  H04B7/06 ,  H04B7/022 ,  H04W72/12

Abstract: Wireless communications systems and methods related to improving macro diversity are provided. A first wireless communication device communicates, in a frequency channel, a first signal with a user equipment (UE) during a first time period. The first wireless communication device coordinates, with a second wireless communication device, a communication of a second signal with the UE in the frequency channel during a second time period. The coordination with the second wireless communication device is based on a switch to coordinate with the second wireless communication device based on at least occupancy of the frequency channel. The second wireless communication device communicates, in the frequency channel, the second signal with the UE during the second time period based on the coordination. The first wireless communication device and the second wireless communication device are different. The first time period and the second time period are different.

公开(公告)号：US10700830B2

公开(公告)日：2020-06-30

申请号：US14847308

申请日：2015-09-08

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Siddhartha Mallik ,  Arumugam Chendamarai Kannan ,  Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04L5/00 ,  H04W16/14 ,  H04W74/00 ,  H04L5/14 ,  H04B7/26

Abstract: Techniques are described for conveying identification information in a preamble transmission. A transmission burst may be generated for transmission over a wireless medium. The transmission burst may include the preamble and a body portion. The preamble may include identification information associated with at least one of a transmitting device or a category of data bring transmitted. The transmission burst may then be transmitted over the wireless medium.

公开(公告)号：US10681733B2

公开(公告)日：2020-06-09

申请号：US15649074

申请日：2017-07-13

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Taesang Yoo ,  Jing Sun ,  Anastasios Stamoulis ,  Aleksandar Damnjanovic ,  Juan Montojo

IPC: H04W4/00 ,  H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04W88/06

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) or base station communicating in an unlicensed radio frequency spectrum band may transmit a signal (e.g., a request-to-send (RTS) or clear-to-send (CTS) signal) in a licensed radio frequency spectrum band to decrease the likelihood that neighboring devices will transmit interfering communications. Specific resources may be designated in the licensed radio frequency spectrum band for transmitting these signals, and these resources may be associated with specific unlicensed channels. Signaling in the licensed radio frequency spectrum band may also carry an indication of the unlicensed channel being used or other information relevant to the unlicensed communication. The RTS/CTS signaling in licensed radio frequency spectrum band may be transmitted during a downlink transmit opportunity or an uplink transmit opportunity, or both. Different energy detection thresholds may apply to RTS/CTS signals in licensed and unlicensed spectrum.

公开(公告)号：US20200100250A1

公开(公告)日：2020-03-26

申请号：US16696766

申请日：2019-11-26

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W74/08 ,  H04W72/10 ,  H04W28/26 ,  H04L5/00

Abstract: Techniques are described for wireless communication at a wireless device. One method includes identifying a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities; identifying an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, in which each of the number of CCA slots is associated with a higher priority than the identified priority of the wireless device; and communicating over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

公开(公告)号：US10587497B2

公开(公告)日：2020-03-10

申请号：US15659574

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04L12/28 ,  H04L12/761 ,  H04W52/54 ,  H04B17/318 ,  H04B7/06 ,  H04W52/34 ,  H04B17/24 ,  H04W52/24 ,  H03M13/09 ,  H04L12/18 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12 ,  H04L5/00 ,  H04B7/216 ,  H04W52/14 ,  H04W52/16 ,  H04W52/38 ,  H04W52/42 ,  H04W52/50 ,  H04W52/56 ,  H04L12/24 ,  H04W76/22 ,  H04W24/08 ,  H04L1/00 ,  H04L1/18 ,  H04W24/02 ,  H04W76/19 ,  H04W24/04 ,  H04W48/08 ,  H04W92/20

Abstract: Various aspects of the disclosure relate to channel sensing for independent links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). For example, the first device may communicate with a second device (e.g., a first TRP) via a first link and communicate with a third device (e.g., a second TRP) via a second link. In some scenarios, first channel sensing information may be obtained for the first link and second channel sensing information may be obtained for the second link. In some aspects, a decision of whether to transmit via one or more of the links may be based on the channel sensing on one or more of the links. In some cases, the links may be grouped together as a channel sensing group.

公开(公告)号：US10574422B2

公开(公告)日：2020-02-25

申请号：US16016176

申请日：2018-06-22

Applicant: QUALCOMM Incorporated

Inventor： Qingsi Wang ,  Yisheng Xue ,  Siddhartha Mallik ,  Ahmed Kamel Sadek

IPC: H04W4/00 ,  H04L5/00 ,  H04L1/00 ,  H04L1/20 ,  H04L1/18 ,  H04W72/04 ,  H04L5/14

Abstract: Methods, systems, and devices for wireless communication are described. A method may include obtaining a first channel quality indicator (CQI) backoff value based on a first set of acknowledgment messages associated with a first subframe of a first interval; setting a modulation and coding scheme (MCS) of a first subframe of a second interval using the first CQI backoff value; obtaining a second CQI backoff value based on a second set of acknowledgment messages associated with a second subframe of the first interval; and setting a MCS of the second subframe of the second interval using the second CQI backoff value.

公开(公告)号：US10554539B2

公开(公告)日：2020-02-04

申请号：US15659576

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04W4/00 ,  H04L12/761 ,  H04W52/54 ,  H04B17/318 ,  H04B7/06 ,  H04W52/34 ,  H04B17/24 ,  H04W52/24 ,  H03M13/09 ,  H04L12/18 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12 ,  H04L5/00 ,  H04B7/216 ,  H04W52/14 ,  H04W52/16 ,  H04W52/38 ,  H04W52/42 ,  H04W52/50 ,  H04W52/56 ,  H04L12/24 ,  H04W76/22 ,  H04W24/08 ,  H04L1/00 ,  H04L1/18 ,  H04W24/02 ,  H04W76/19 ,  H04W24/04 ,  H04W48/08 ,  H04W92/20

Abstract: Various aspects of the disclosure relate to communicating control information for independent links. For example, control information for one link may be sent via at least one other link. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). In some scenarios, one link may carry control information for multiple links. For example, one link may indicate the existence of or traffic on at least one other link. As another example, one link may transmit feedback for multiple links. In some scenarios, each link may be provisioned (e.g., as a primary link or a secondary link) to carry specific types of control information for one or more links.

公开(公告)号：US10547422B2

公开(公告)日：2020-01-28

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：US10524279B2

公开(公告)日：2019-12-31

申请号：US15499570

申请日：2017-04-27

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L5/00 ,  H04L25/02 ,  H04W28/02 ,  H04W72/04 ,  H04W72/08

Abstract: Joint aspects of coordinated multiple (CoMP) operations is discussed between multiple entities that may be in different CoMP clusters or even deployed by different operators. Participating base stations obtain channel related information such as sounding reference signals (SRS), channel state information (CSI), and the like from one or more neighbor user equipments (UE) served by a different base station. The base station determines a channel estimate at the neighbor UEs using the channel related information and selects a beamforming vector and schedules downlink transmissions to a served UE based on the channel estimates incorporating the channels of the other neighbor UEs. The selected beamforming vectors and transmission schedules minimizes the interference at the neighbor UEs.