公开(公告)号：US10735121B2

公开(公告)日：2020-08-04

申请号：US15684495

申请日：2017-08-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W72/10 ,  H04W16/14 ,  H04W72/12 ,  H04J11/00 ,  H04L25/02 ,  H04L5/00 ,  H04L5/14 ,  H04B1/10 ,  H04B7/0452 ,  H04B7/0413

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：US10728765B2

公开(公告)日：2020-07-28

申请号：US16224540

申请日：2018-12-18

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Xiaoxia Zhang ,  Sanaz Barghi ,  Juan Montojo

IPC: H04W16/14 ,  H04W74/08

Abstract: Aspects of the disclosure relate to wireless communication systems configured to share a shared spectrum with one or more other systems (e.g., other operator networks utilizing the same radio access technology, and/or other networks utilizing different radio access technologies). Coexistence between the different systems on the shared spectrum may be provided by utilizing a technology-neutral signature waveform such as a signature sequence. A device or system may monitor a shared spectrum channel for the signature waveform, and when detected, may determine whether the shared spectrum is available for that system, or busy as occupied by another system. When the shared spectrum channel is idle, the device or system may reserve the channel by transmitting the signature waveform. Other aspects, embodiments, and features are also claimed and described.

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：US10680771B2

公开(公告)日：2020-06-09

申请号：US14797644

申请日：2015-07-13

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Xiliang Luo ,  Peter Gaal ,  Tao Luo ,  Durga Prasad Malladi ,  Yongbin Wei ,  Wanshi Chen ,  Hao Xu ,  Aleksandar Damnjanovic ,  Arumugam Chendamarai Kannan

IPC: H04L5/00 ,  H04L25/02 ,  H04W72/04 ,  H04W72/12 ,  H04W88/08

Abstract: Techniques are provided for combining different types of reference signals. A wireless communications network may be configured to allow a user equipment (UE) to combine multiple demodulation reference signals (DM-RSs) to support demodulation of a physical downlink shared channel (PDSCH), and/or other downlink transmissions, transmitted from a base station to the UE. The base station may provide explicit signaling that reference signals transmitted in two or more transmission time intervals may be combined, or a determination that reference signals transmitted in two or more transmission time intervals may be combined may be made implicitly based on system configuration and previous transmissions. Based on the explicit signaling and/or implicit determination, a UE may combine reference signals included in each of two or more reference signals for use in demodulation of downlink transmissions.

公开(公告)号：US10674449B2

公开(公告)日：2020-06-02

申请号：US16187836

申请日：2018-11-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Taesang Yoo ,  Aleksandar Damnjanovic ,  Tamer Kadous ,  Yongbin Wei

IPC: H04B1/38 ,  H04W52/02 ,  H04W72/12 ,  H04W74/08 ,  H04B7/26 ,  H04W16/14 ,  H04W88/02

Abstract: Techniques are described herein for using a signal to wake up a user equipment (UE) that is in a low-power mode in a synchronized wireless communication system operating a shared radio frequency spectrum band. Once a base station wins a contention for a transmission opportunity in the shared radio frequency spectrum band, the base station may transmit a single signal before the transmission opportunity. After receiving the signal, the UE may begin monitoring for control information (e.g., control resource sets) associated with slots in the transmission opportunity. If the control information indicates that the content of the slot is for the UE, the UE may monitor the slot for its content.

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：US10602543B2

公开(公告)日：2020-03-24

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 ,  H04W72/04 ,  H04L27/26 ,  H04W16/14

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.