公开(公告)号：US11190234B2

公开(公告)日：2021-11-30

申请号：US16385943

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei ,  Jing Sun ,  Andrei Dragos Radulescu

IPC: H04B1/7136 ,  H04B1/7143 ,  H04B1/7156 ,  H04L27/26

Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.

公开(公告)号：US11153869B2

公开(公告)日：2021-10-19

申请号：US15889454

申请日：2018-02-06

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Peter Gaal ,  Wanshi Chen ,  Tingfang Ji ,  Durga Prasad Malladi ,  Yongbin Wei ,  Naga Bhushan ,  Aleksandar Damnjanovic ,  Tao Luo

IPC: H04W72/04 ,  H04W28/18 ,  H04W72/12 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to techniques for configuring an adaptive frame structure for wireless communications systems using unlicensed radio frequency spectrum. A base station (BS) may determine whether another device is transmitting on a channel in the unlicensed radio frequency spectrum or one or more other network conditions pertaining to the channel, determine a frame structure from a plurality of frame structures used for data communications based at least in part on the one or more network conditions, wherein each of the plurality of frame structures has a different frame duration, and communicate with a user equipment (UE) using the determined frame structure. A UE may determine a frame structure from a plurality of frame structures used for data communications, wherein each of the plurality of frame structures has a different frame duration, and communicate with a BS using the determined frame structure.

公开(公告)号：US11139913B2

公开(公告)日：2021-10-05

申请号：US16540949

申请日：2019-08-14

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04L1/00 ,  H04B17/345 ,  H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W84/04 ,  H04W84/12

Abstract: In an unlicensed band, different types of interference may be experienced by user equipments (UEs), and a serving evolved Node B (eNB) may not be aware of the interference types affecting a UE. Therefore, aspects presented herein provide UE assisted interference learning, in which the UE detects an interfering signal and reports information such as the interference level and properties of the interfering signal to a serving eNB. Another aspects presented herein provide for an eNB which receives, from one or more UEs, information indicating properties of each of at least one interfering signals experienced by the UEs, such as interference types affecting the UEs. The eNB further uses the information received from the UE, including the wireless technology type to determine the properties of its downlink transmission and the length of the contention window leading up to its downlink transmission.

公开(公告)号：US11122541B2

公开(公告)日：2021-09-14

申请号：US16836460

申请日：2020-03-31

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Tao Luo ,  Tingfang Ji ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei ,  Gavin Bernard Horn

IPC: H04W72/00 ,  H04W52/02 ,  H04W48/12 ,  H04W48/14

Abstract: The described aspects include methods and apparatus for activating a transmitter to communicate in a wireless network. A small cell can determine to activate the transmitter to serve user equipment (UE) in a wireless network. The small cell can then broadcast a portion of a set of broadcast signals in a radio frame and broadcast a remaining portion of the set of broadcast signals along with the portion of the set of broadcast signals in a subsequent radio frame. By refraining from immediately broadcasting all broadcast signals, the small cell can mitigate interference to other small cells. In addition, a UE can determine whether to generate random access channel (RACH) sequences for proximity determination or uplink timing synchronization based on parameters received in a RACH order. Moreover, a small cell with an active transmitter can decode discovery signals from a device to facilitate handover determination.

公开(公告)号：US11115977B2

公开(公告)日：2021-09-07

申请号：US16369308

申请日：2019-03-29

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Alberto Rico Alvarino ,  Peter Gaal ,  Wanshi Chen ,  Yongbin Wei ,  Juan Montojo ,  Renqiu Wang ,  Hao Xu ,  Xiaofeng Wang

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/20

Abstract: Aspects of the present disclosure provide techniques for uplink (UL) data channel design. An example method is provided for operations which may be performed by a first apparatus. The example method generally comprises determining a number of pilot symbols to transmit for one or more slots of a first subframe based, at least in part, on a coverage enhancement (CE) level, and transmitting at least one uplink data channel having the determined number of pilot symbols in the one or more slots of the first subframe.

公开(公告)号：US11102779B2

公开(公告)日：2021-08-24

申请号：US15610869

申请日：2017-06-01

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Alberto Rico Alvarino ,  Hao Xu ,  Wanshi Chen ,  Juan Montojo ,  Yongbin Wei ,  Peter Gaal

IPC: H04W72/04 ,  H04L5/00 ,  H04B1/713 ,  H04W56/00

Abstract: Various aspects of utilizing narrowband internet of things (NB IOT) communication are still under development. According to an aspect of the disclosure, the apparatus may be a user equipment (UE) for wireless communication via narrowband internet of things (NB IOT) in an unlicensed spectrum using frequency hopping and digital modulation. The UE performs a synchronization with a base station via at least one of a licensed spectrum or the unlicensed spectrum. The UE communicates with the base station based on the synchronization.

公开(公告)号：US20210250932A1

公开(公告)日：2021-08-12

申请号：US17248248

申请日：2021-01-15

Applicant: QUALCOMM INCORPORATED

Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei

IPC: H04W72/04 ,  H04W72/12 ,  H04W72/14 ,  H04L5/00

Abstract: Wireless communications systems and methods related to uplink communications with transmission on-off patterns and frequency-hopping in a shared radio frequency band are provided. A first wireless communication device communicates, with a second wireless communication device, a configuration indicating a plurality of uplink (UL) transmission on-off patterns that are offset from each other in time. The first wireless communication device communicates, with the second wireless communication device in an unlicensed band, a first UL communication signal based on a first UL transmission on-off pattern of the plurality of UL transmission on-off patterns.

公开(公告)号：US20210219283A1

公开(公告)日：2021-07-15

申请号：US17247121

申请日：2020-11-30

Applicant: QUALCOMM INCORPORATED

Inventor： Yisheng Xue ,  Chih-Hao Liu ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei

IPC: H04W72/04 ,  H04W28/26

Abstract: Wireless communications systems and methods related to autonomous sidelink communication are provided. A first user equipment (UE) communicates, in a first subband of a plurality of subbands within a shared radio frequency band during a first time period, first sidelink control information (SCI) associated with a second subband of the plurality of subbands. The first UE communicates, with the second UE, first sidelink data in the second subband during the first time period based on the first SCI. The first UE communicates, with the second UE in the first subband during a second time period, second SCI associated with a third subband of the plurality of subbands, the third subband being different from the second subband based on a frequency hopping pattern. The first UE communicates, with the second UE, second sidelink data in the third subband during the second time period based on the second SCI.

公开(公告)号：US11057885B2

公开(公告)日：2021-07-06

申请号：US16391001

申请日：2019-04-22

Applicant: QUALCOMM incorporated

Inventor： Srinivas Yerramalli ,  Jing Sun ,  Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described that provide for frame-based initiator device operations. A wireless device may be operating within a frame-based equipment communications system, where a frame may include a channel occupancy time period and a minimum idle period. An initiating device may be configured to initiate autonomous uplink communications during the channel occupancy time period of its frame, while the device may not initiate communications during an idle period of its frame. In some cases, a frame-based equipment communications system may include more than one initiating device, where the idle periods for different initiating devices may occur at different times. In some cases, the initiating device may be configured to initiate communications during the idle period for another initiating device. This may allow the wireless system to decrease system overhead associated with a minimum idle period per frame.

公开(公告)号：US11057175B2

公开(公告)日：2021-07-06

申请号：US16259941

申请日：2019-01-28

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Peter Gaal ,  Hao Xu ,  Wanshi Chen ,  Yongbin Wei ,  Xiao Feng Wang ,  Renqiu Wang ,  Seyed Ali Akbar Fakoorian ,  Madhavan Srinivasan Vajapeyam ,  Alberto Rico Alvarino ,  Juan Montojo

IPC: H04W72/04 ,  H04L5/00 ,  H04J11/00 ,  H04L27/26 ,  H04W56/00

Abstract: Aspects of the present disclosure provide techniques for design of synchronization signals for narrowband operation, which can be used for stand-alone/in-band/guard-band deployment. An example method is provided for operations which may be performed by a base station (BS). The example method generally includes generating a primary synchronization signal (PSS) utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, generating a secondary synchronization signal (SSS) based on a second code sequence over a second number of symbols within one or more subframes, and transmitting the PSS and the SSS in the first and second subframes to a first type of a user equipment (UE) that communicates on one or more narrowband regions of wider system bandwidth.