公开(公告)号：US20180368089A1

公开(公告)日：2018-12-20

申请号：US15989698

申请日：2018-05-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04W56/00 ,  H04J11/00 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a first synchronization sequence and generate a second synchronization sequence based at least in part on the first synchronization sequence. The base station may map the first synchronization sequence to a first resource block of a synchronization channel associated with a first frequency sub-band of a shared radio frequency spectrum band and the second synchronization sequence to a second resource block associated with a second frequency sub-band of the synchronization channel. The base station may then transmit the first synchronization sequence and the second synchronization sequence concurrently over the synchronization channel using the first resource block and the second resource block according to the mapping. In some cases, the second synchronization may be generated by applying a first phase shift to the first synchronization sequence.

公开(公告)号：US20180352563A1

公开(公告)日：2018-12-06

申请号：US15926032

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L1/18 ,  H04L5/00

CPC classification number: H04L5/0044 ,  H04L5/0053 ,  H04L27/0006

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit downlink control information to a user equipment (UE). The downlink control information may identify a grantless uplink group associated with one or more grantless uplink subframes for the UE. The UE may transmit uplink control information for the one or more grantless uplink subframes associated with the indicated uplink group of the UE. The UE may then transmit grantless uplink data during at least one of the one or more grantless uplink subframes based at least in part on the grantless uplink group associated for the UE and the uplink control information.

公开(公告)号：US20180317259A1

公开(公告)日：2018-11-01

申请号：US15949945

申请日：2018-04-10

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Sundar Subramanian ,  Tamer Kadous

IPC: H04W74/08

CPC classification number: H04W74/0816

Abstract: Methods, systems, and devices for wireless communication are described. A wireless node may transmit directional signals in a sweeping transmission pattern while receiving communications from a second wireless node. Another wireless node may then, during a listen-before-talk (LBT) procedure, receive one of the directional signals, and terminate a correspondence communication session to avoid potential interference. Additionally or alternatively, a wireless node may listen in directions in a sweeping receive pattern while transmitting to a second wireless node. While listening, the wireless node may detect a transmission from a third wireless node in a particular direction. The wireless node may then accordingly refrain from transmitting in that direction to avoid potential interference.

公开(公告)号：US20180288747A1

公开(公告)日：2018-10-04

申请号：US15898987

申请日：2018-02-19

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tao Luo ,  Sony Akkarakaran ,  Rahul Malik ,  Tamer Kadous ,  Akula Reddy

IPC: H04W72/04 ,  H04B7/185 ,  H04B1/713 ,  H04L27/26 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify control information to be transmitted, in a slot, to a user equipment (UE). The base station may determine a configuration for splitting a control resource set for the control information into a first component control resource set and a second component control resource set within a supported bandwidth of the UE. The first component control resource set may be frequency diverse and time diverse from the second component control resource set. The base station may transmit the configuration to the UE.

公开(公告)号：US20180287840A1

公开(公告)日：2018-10-04

申请号：US15936311

申请日：2018-03-26

Applicant: QUALCOMM Incorporated

Inventor： Sony Akkarakaran ,  Tao Luo ,  Jing Sun ,  Rahul Malik ,  Tamer Kadous ,  Akula Reddy

IPC: H04L27/26 ,  H04L5/00

Abstract: Aspects of the disclosure relate to synchronization signaling supporting multiple waveforms. A synchronization signal block (SSB) is configurable for transmission using either at least a first waveform or a second waveform, where the first waveform has higher peak to average power ratio (PAPR) characteristics such as OFDM and the second waveform has lower PAPR characteristics, such as DFT-S-OFDM. The SSB is transmitted selectively using either the first waveform or the second waveform for transmission of the SSB. Furthermore, the characteristics of the transmission such as a predetermined pattern of the first and second waveform transmissions may be utilized to communicate to a receiver the type of waveform being used. In this manner, SSB transmissions may take advantage of respective advantages afforded by each type of waveform, particularly when using higher frequency transmissions above 40 GHz in wireless communication systems.

公开(公告)号：US20180249380A1

公开(公告)日：2018-08-30

申请号：US15883237

申请日：2018-01-30

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Taesang Yoo

IPC: H04W28/26 ,  H04W8/24 ,  H04W28/12 ,  H04W72/04 ,  H04W16/14

Abstract: Wireless communications systems and methods related to sharing a spectrum using node-specific medium reservation signals are provided. A first wireless communication device a first configuration designated to the first wireless communication device. The first configuration indicates at least one waveform for representing reservation information. The first wireless communication device transmits a reservation signal to reserve a transmission opportunity (TXOP) in a shared spectrum. The reservation signal includes a first waveform representing corresponding first reservation information based on the first configuration. The first waveform is associated with a root sequence and a cyclic-shift value. The first reservation information indicates a transmit power level of the reservation signal. The first reservation information indicates an interference tolerance level of the first wireless communication device. The first reservation information indicates a reserved duration within the TXOP.

公开(公告)号：US20180227936A1

公开(公告)日：2018-08-09

申请号：US15887277

申请日：2018-02-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04L27/26

Abstract: Techniques for autonomous uplink (AUL) transmissions are provided that allow for efficient use of shared radio frequency spectrum band resources. A user equipment (UE) may determine a duration of an AUL transmission and modify an uplink waveform or provide an indication to a base station of one or more channel resources that may be available for base station transmissions, in order to more fully utilize shared radio frequency spectrum band resources within a maximum channel occupancy time (MCOT). A base station may activate or deactivate AUL transmissions through downlink control information (DCI) transmitted to the UE. A UE and base station may exchange various other control information to provide relatively efficient autonomous uplink transmissions and use of the shared radio frequency spectrum band resources.

公开(公告)号：US20180213560A1

公开(公告)日：2018-07-26

申请号：US15656842

申请日：2017-07-21

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Naghshvar ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08

CPC classification number: H04W74/0808 ,  H04B7/00 ,  H04W74/0816

Abstract: Methods, systems, and devices for wireless communication are described. A transmitting wireless device may select a direction for a wireless transmission over a channel The transmitting wireless device may monitor an availability of the channel in the selected direction for a duration of a first channel listening time corresponding to the selected direction. The transmitting wireless device may determine that the channel is available in the selected direction based on either an absence of channel reservation messages during the monitoring, or a first channel reservation message received during the monitoring. The first channel reservation message may indicate a permissibility of a simultaneous transmission in the selected direction. The transmitting wireless device may transmit a second channel reservation message to a receiving wireless device over the channel in the selected direction based on the determination that the channel is available in the selected direction.

公开(公告)号：US20180160389A1

公开(公告)日：2018-06-07

申请号：US15826439

申请日：2017-11-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Hao Xu ,  Tamer Kadous

IPC: H04W64/00 ,  H04W74/08 ,  H04W24/10

CPC classification number: H04W64/00 ,  H04W16/14 ,  H04W24/10 ,  H04W74/0808 ,  H04W88/02 ,  H04W88/08

Abstract: Positioning techniques for wireless communications devices using shared radio frequency spectrum are provided that may enhance positioning determination for devices operating using shared radio frequency spectrum. Various disclosed techniques provide for identifying determining one or more parameters for a positioning procedure for a UE based on characteristics of shared radio frequency spectrum transmissions. Such parameters may include, for example, frequency information for positioning transmissions or frequency hopping patterns. In some cases, a base station may transmit multiple positioning transmissions that have different coverage levels. In some cases, a UE may transmit an uplink positioning signal that may be received by multiple base stations and used for UE position determination. In some cases, a UE may be configured to monitor for a positioning transmissions on a dedicated frequency, and report measurements associated with the positioning transmissions using a shared frequency.

公开(公告)号：US20180139616A1

公开(公告)日：2018-05-17

申请号：US15810963

申请日：2017-11-13

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Farhad Meshkati ,  Tamer Kadous ,  Mehmet Yavuz ,  Chirag Sureshbhai Patel

IPC: H04W16/14 ,  H04W88/08 ,  H04B1/7097

Abstract: One method includes identifying a listen-before-talk (LBT) silencing criterion between each pair of wireless devices in a plurality of wireless devices; dividing the plurality of wireless devices into a plurality of independent sets based at least in part on the identified LBT silencing criterions; determining, for a location, an aggregated interference value for each independent set; determining an aggregated interference value for the location based at least in part on the determined aggregated interference values for each independent set; and selectively adjusting a wireless communication parameter of at least one of the wireless devices to alter the aggregated interference value for the location.