公开(公告)号：US10715210B1

公开(公告)日：2020-07-14

申请号：US16124878

申请日：2018-09-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04B1/713 ,  H04B1/7143 ,  H04J1/06 ,  H04B1/7136

Abstract: There is a need for a mechanism that increases the UE's chance of properly receiving the NPSS and/or NSSS when frequency hopping is used for narrowband communications in the unlicensed frequency spectrum. The present disclosure provides a solution by transmitting the NPSS and NSSS using a synchronization signal repetition pattern in order to increase the detection probability for the DRS, so that synchronization and/or cell acquisition may be achieved with a reduced number of visits to the anchor channel, thereby reducing synchronization delay and increasing the QoS.

公开(公告)号：US20200220649A1

公开(公告)日：2020-07-09

申请号：US16824971

申请日：2020-03-20

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L1/00 ,  H04L5/00 ,  H04W72/04 ,  H04W4/70 ,  H04W16/14

Abstract: Some techniques and apparatuses described herein may be used to avoid or reduce collisions between uplink data communications and uplink control communications for an enhanced machine-type communication user equipment (eMTC UE) operating in an unlicensed radio frequency spectrum band. Furthermore, some techniques and apparatuses may avoid such collision while still allowing efficient use of resources, such as by deferring the uplink data communication within a data segment, rate matching an uplink data communication around uplink control resources (e.g., cell-specific uplink control resources and/or UE-specific uplink control resources), puncturing the uplink data communication to avoid the uplink control resources, multiplexing uplink control information on an uplink data channel, and/or the like.

公开(公告)号：US10707915B2

公开(公告)日：2020-07-07

申请号：US16128154

申请日：2018-09-11

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04B1/7143 ,  H04L5/00 ,  H04B1/7136 ,  H04W16/14 ,  H04B1/713 ,  H04W48/16 ,  H04L27/26

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one example, the apparatus may be a base station. In certain configurations, the apparatus may transmit information indicating a narrowband frequency hopping pattern to at least one UE. In certain aspects, the narrowband frequency hopping pattern may correspond to a plurality of frames. In certain other aspects, the plurality of frames may include at least one non-anchor channel and being associated with a plurality of anchor channels. The apparatus may communicate with the at least one UE using the narrowband frequency hopping pattern. In certain aspects, communication on the plurality of anchor channels may occur during the same frames.

公开(公告)号：US10700910B2

公开(公告)日：2020-06-30

申请号：US16003456

申请日：2018-06-08

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tamer Kadous ,  Tao Luo ,  Xiao Feng Wang ,  Jing Lei

IPC: H04L27/34 ,  H04J1/00 ,  H04L27/26 ,  H04L5/00

Abstract: In order to maintain flexible system bandwidth and a flexible center frequency, without requiring a cyclic prefix or guard interval, a transmitter apparatus transmits a reference signal based on a single carrier waveform having a mixed symbol structure, in reference signal symbols using at least one of a cyclic prefix and a guard interval and transmits data based on the single carrier waveform without the cyclic prefix or the guard interval. The data may be based on input data processed using overlapping FFT windows, and an amount of overlap between the FFT windows may be configurable by the transmitter or the receiver. An apparatus receiving the downlink transmission comprising data based on a single carrier waveform may process the data based on overlapping FFT windows.

公开(公告)号：US10681723B2

公开(公告)日：2020-06-09

申请号：US15695167

申请日：2017-09-05

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos Radulescu ,  Chirag Patel ,  Arumugam Chendamarai Kannan ,  Tamer Kadous ,  Tao Luo ,  Jing Sun

IPC: H04W72/14 ,  H04B7/06 ,  H04L1/18 ,  H04B7/0408 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for wireless communication are provided. The apparatus may be a base station. The apparatus may transmit an uplink grant to a UE during a first transmit opportunity. The apparatus may signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity. The grant trigger may be associated with a set of UEs that includes the UE. The set of UEs may be a subset of the UEs having pending transmissions. The apparatus may instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

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：US10659102B2

公开(公告)日：2020-05-19

申请号：US15884161

申请日：2018-01-30

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04B1/7156 ,  H04B1/7083 ,  H04B1/7087 ,  H04B1/7143 ,  H04B1/713 ,  H04J11/00

Abstract: Described techniques provide for transmission of synchronization signals using frequency hopping across a number of hopping frequencies in unlicensed or shared radio frequency spectrum. A base station may identify a set of hop frequencies for transmitting synchronization signals, and transmit synchronization signals using a hopping pattern over the hop frequencies. A user equipment (UE) seeking to identify the base station may monitor one or more of the hop frequencies to identify one or more synchronization signals on the hop frequency. A system timing may be identified in some cases, and one or more base station IDs may be identified. In some cases, a hop frequency may be monitored for a duration that may span the transmission of two or more synchronization signals of a particular base station, based on a periodicity of synchronization signal transmissions on each hop frequency.

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.

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：US20200067748A1

公开(公告)日：2020-02-27

申请号：US16513350

申请日：2019-07-16

Applicant: QUALCOMM INCORPORATED

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04W16/28

Abstract: Wireless communications systems and methods related to multiplexing different waveforms in wireless networks are provided. A first wireless communication device identifies a configuration for communicating a first waveform signal before a guard interval (GI)-based waveform signal, the configuration indicating a GI waveform requirement of the GI-based waveform signal. The first wireless communication device communicates, with a second wireless communication device, the first waveform signal including a plurality of first symbols carrying data, wherein a last symbol of the plurality of first symbols includes a portion without data transmission based on the GI waveform requirement.