公开(公告)号：US11172504B2

公开(公告)日：2021-11-09

申请号：US16562687

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei ,  Tamer Kadous

IPC: H04J1/16 ,  H04W74/00 ,  H04L5/00 ,  H04W16/14 ,  H04W72/04

Abstract: Coordination of listen before talk (LBT) structure in new radio (NR) unlicensed (NR-U) multi-channel access operations is disclosed. In one aspect, when a base station determines to access shared communication spectrum, it may transmit an LBT structure signal that identifies the current LBT structure. The base station would then attempt access to the shared spectrum according to the LBT structure. In another aspect, a coordination server is used to manage access to the shared spectrum. Each node desiring access registers with the coordination server, which provides access parameters for the accessing node to use that increases the likelihood of successful access. The accessing nodes will transmit the selected access configuration used to access the shared spectrum, wherein the access configuration is selected based on the access parameters.

公开(公告)号：US20210219344A1

公开(公告)日：2021-07-15

申请号：US17122768

申请日：2020-12-15

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Yisheng Xue ,  Maarten Menzo Wentink ,  George Cherian

IPC: H04W74/08 ,  H04W16/14

Abstract: A relaxed threshold for synchronous access in unlicensed spectrum is disclosed. According to the aspects described herein, nodes accessing a shared communication spectrum using a local synchronous access mode may attempt access via a listen before talk (LBT) procedure using a local synchronous energy detection (ED) threshold. The local synchronous ED threshold is relaxed relative to a standard ED threshold otherwise used for access to the shared communication spectrum. The relaxed nature of the local synchronous ED threshold allows local synchronous access nodes a higher probability to gain access to the shared communication channel. To prevent interference with global synchronous access nodes, the global synchronous access nodes are also able to use the relaxed, local synchronous ED threshold as long as it ends the resulting channel occupancy time (COT) at the next local synchronization boundary.

公开(公告)号：US11064500B2

公开(公告)日：2021-07-13

申请号：US16688140

申请日：2019-11-19

Applicant: QUALCOMM Incorporated

Inventor： Hua Wang ,  Piyush Gupta ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Yisheng Xue ,  Seyed Ali Akbar Fakoorian

IPC: H04W72/08 ,  H04W24/08

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for determining a helper UE group to facilitate communications with a target using sidelinks. A helper UE may determine a sidelink channel correlation with at least one other UE, report to a base station channel diversity information, UE state information, UE traffic pattern information, sidelink channel measurements, and the determined sidelink channel correlation; and receive an indication from the gNB if the UE is a member of a helper UE group. A base station may transmit a control message to at least one UE; receive a report comprising sidelink channel correlation information, sidelink channel diversity information, and UE state information, from each of the at least one UE, in response to transmitting the control message; and determine a helper UE group based on the received report.

公开(公告)号：US20210204232A1

公开(公告)日：2021-07-01

申请号：US17137241

申请日：2020-12-29

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Maarten Menzo Wentink ,  Yisheng Xue ,  Marco Papaleo

IPC: H04W56/00

Abstract: Indication of globally synchronous communications mode is disclosed. A first node may detect an indication signal transmitted by a second node at a synchronization boundary of a shared communication channel. The indication signal is configured to identify a first transmission synchronization mode of the second node. The first node may then adjust its communications configuration in response to the indication signal. In making such adjustments, the first node may either contend for communications on the shared communication channel using the first transmission synchronization mode or refrain from attempting the communications on the shared communication channel using a second transmission synchronization mode.

公开(公告)号：US20210127253A1

公开(公告)日：2021-04-29

申请号：US17078905

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang ,  Yongbin Wei

IPC: H04W8/00 ,  H04W72/02 ,  H04W72/12 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. In a first case, a first user equipment (UE) may transmit to a second UE a sidelink discovery message preamble corresponding to a sidelink discovery message. The first UE may identify resources for transmission of the sidelink discovery messages based on the sidelink discovery message preamble. The first UE may either transmit the sidelink discovery message to the second UE or may receive the sidelink discovery message from the second UE using the identified resources for the transmission of the sidelink discovery message. In some cases, the second UE may transmit sidelink control information (SCI) to the first UE, and may transmit a sidelink discovery message to the first UE based on resources identified in the SCI. In some cases, the first UE may transmit the sidelink discovery message without transmission of a preamble or a SCI.

公开(公告)号：US20210075691A1

公开(公告)日：2021-03-11

申请号：US16565364

申请日：2019-09-09

Applicant: QUALCOMM Incorporated

Inventor： Weiliang Zeng ,  Sanaz Barghi ,  Siddhartha Mallik ,  Taesang Yoo ,  Yisheng Xue ,  Xiaoxia Zhang

IPC: H04L12/24 ,  H04L25/02 ,  H04L12/26 ,  H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04W72/08 ,  G06N3/04

Abstract: Methods, systems, and devices for wireless communications are described, and relate to a base station to communicating with a user equipment (UE) over a channel. A first device (for example, the base station or the UE) may use a trained neural network to estimate one or more link performance metrics associated with the channel. Predicting the link level performance may include determining one or more neural network weights associated with one or more input parameters associated with the channel to estimate the one or more link performance metrics. The first device may report feedback to the second device based on the estimated link performance metrics. Based on the feedback, the second device may adapt the link by adjusting channel parameters to improve the reliability or efficacy of later transmissions.

公开(公告)号：US20200305202A1

公开(公告)日：2020-09-24

申请号：US16811207

申请日：2020-03-06

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Yisheng Xue ,  Jing Sun ,  Yongbin Wei

IPC: H04W74/08 ,  H04W76/10 ,  H04W72/04

Abstract: This disclosure describes methods, devices, and systems for techniques related to random access channel (RACH) operation. A user equipment (UE) may establish a connection with a base station using a random access procedure. Based on a transmission priority or a network parameter, the random access procedure may be a two-step random access procedure or a four-step random access procedure. The described techniques may support physical layer procedures, including resource configurations and communication schemes that may support enhanced signaling capacity. In some examples, the described techniques may include signaling characteristics and resource mappings for two-step random access procedure based on a transmission priority. In other examples, the described techniques may include antenna techniques associated with a four-step random access procedure. The physical layer procedures may include features for improved data rates, increased spectral efficiency and, in some examples, may promote low latency communication associated with random access, among other advantages.

公开(公告)号：US20200100247A1

公开(公告)日：2020-03-26

申请号：US16554194

申请日：2019-08-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Yisheng Xue ,  Aleksandar Damnjanovic ,  Jing Sun ,  Tamer Kadous ,  Yongbin Wei

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

Abstract: Wireless communications systems and methods related to communications with narrowband wireless communication devices over a wide frequency band are provided. A first wireless communication device transmits a first configuration indicating a first set of channel monitoring occasions for a first channel and a second set of channel monitoring occasions for a second channel The first wireless communication device transmits, in the first channel based on at least a listen-before-talk (LBT) in the first channel, a first occupancy indication signal indicating a first transmission opportunity (TXOP) in the first channel. The first wireless communication device transmits, in the first channel based on the first configuration, a second occupancy indication signal associated with the first TXOP in the first channel during a channel monitoring occasion of the first set of channel monitoring occasions within the first TXOP.

公开(公告)号：US20190394790A1

公开(公告)日：2019-12-26

申请号：US16445001

申请日：2019-06-18

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Arumugam Chendamarai Kannan ,  Yisheng Xue ,  Xiaoxia Zhang ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/10 ,  H04W72/04 ,  H04W74/08 ,  H04W52/28

Abstract: Sharing between priority access license (PAL) and general authorized access (GAA) communications in 5G new radio (NR) systems in 3.5 GHz Spectrum Access System (SAS)/License Shared Access (LSA) operations is disclosed. A resource configuration may be defined that identifies a plurality of sound reference signal (SRS) resources including at least a sounding set of SRS resources and a coexistence set of SRS resources. When communication may occur between PAL entities, a base station transmits a trigger signal to a served UE. The UP transmits an SRS in response to the trigger signal using the coexistence set of SRS resources. The SRS over the coexistence set of resources may reserve communication on the shared communication channel.

公开(公告)号：US20190182845A1

公开(公告)日：2019-06-13

申请号：US16190927

申请日：2018-11-14

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Weiliang Zeng ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W72/08 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A transmitter may identify a contention window for a no-energy-detection protocol for determining a channel availability for a data transmission. After the contention window expires, the transmitter may send a request message to a receiver. The receiver may measure a quality of the request message against a request threshold and transmit a response message if the measured quality exceeds the request threshold. The transmitter may then measure a quality of the response message against a response threshold. If the measured quality exceeds the response threshold, the transmitter may initiate a data transmission with the receiver. If the quality falls below the response threshold or the response message is not received, the transmitter may adjust the contention window and reattempt the no-energy-detection protocol. The contention window may also be adjusted based on an acknowledgement message received after the data transmission.