公开(公告)号：US10396959B2

公开(公告)日：2019-08-27

申请号：US15713074

申请日：2017-09-22

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Ashwin Sampath ,  Sumeeth Nagaraja ,  Sundar Subramanian ,  Juergen Cezanne ,  Sony Akkarakaran

IPC: H04L5/00 ,  H04B7/0408 ,  H04B7/06 ,  H04L1/00 ,  H04W16/28 ,  H04W72/04

Abstract: Certain aspects of the present disclosure provide techniques for signaling information regarding beams used for data and control transmissions to a receiving entity.

公开(公告)号：US20190253112A1

公开(公告)日：2019-08-15

申请号：US16221055

申请日：2018-12-14

Applicant: QUALCOMM Incorporated

Inventor： Vasanthan RAGHAVAN ,  Junyi Li ,  Juergen Cezanne

IPC: H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/08

Abstract: Various aspects of the present disclosure generally relate to wireless communication. A first wireless communication device determines a co-phasing factor between at least two transmit beams transmitted by a second wireless communication device. The co-phasing factor is determined for generation of at least one co-phased beam by the second wireless communication device. The first wireless communication device transmits information to the second wireless communication device identifying the co-phasing factor. Numerous other aspects are provided.

公开(公告)号：US20190182091A1

公开(公告)日：2019-06-13

申请号：US16215196

申请日：2018-12-10

Applicant: QUALCOMM Incorporated

Inventor： Tianyang Bai ,  Juergen Cezanne ,  Sundar Subramanian ,  Junyi Li

IPC: H04L27/26 ,  G06F17/14 ,  H04B1/40 ,  H04B1/04 ,  H04B1/16

Abstract: Methods, systems, and devices for wireless communications are described for phase error estimation and correction with sub-symbol resolution. A transmitting device may precode symbols (e.g., phase tracking reference signal (PT-RS) symbols) using a discrete Fourier transform (DFT). The transmitting device may map the DFT-precoded symbols to sets of adjacent subcarriers of a wireless signal, and may map other symbols to other subcarriers of the wireless signal. A receiving device may receive the wireless signal and may compare time domain representations of the DFT-precoded symbols with time domain representations of known reference symbols. The receiving device may estimate a phase error with sub-symbol resolution in the time domain based at least in part on the comparison, and may apply a phase correction in either the time or frequency domain to the other symbols.

公开(公告)号：US20190109625A1

公开(公告)日：2019-04-11

申请号：US16133205

申请日：2018-09-17

Applicant: QUALCOMM Incorporated

Inventor： Sundar Subramanian ,  Juergen Cezanne ,  Bilal Sadiq ,  Muhammad Nazmul Islam ,  Navid Abedini ,  Junyi Li

IPC: H04B7/06 ,  H04B7/0408 ,  H04W16/28 ,  H04W72/04

Abstract: Wireless communication techniques that include beam training performed to aid mobile devices in identifying beams for use in communications (e.g., uplink communications) are discussed. A mobile device may transmit to a base station an indication of a level of beamforming reciprocity of the mobile device. A base station/gNB may transmit an indication of one or more transmission beams to be used by the mobile device for uplink wireless communication based on the level of beamforming reciprocity. The one or more transmission beams to be used by the mobile device for uplink communication may include a reciprocal transmission beam. A mobile device not capable of full beamforming reciprocity may determine a transmission beam through uplink beam training. A mobile device may transmit to a base station information using at least one of the one or more transmission beams. Other aspects and features are also claimed and discussed.

公开(公告)号：US10244492B2

公开(公告)日：2019-03-26

申请号：US15336330

申请日：2016-10-27

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Sundar Subramanian ,  Juergen Cezanne ,  Bilal Sadiq

IPC: H04W56/00 ,  H04W74/08 ,  H04B7/06 ,  H04B7/08

Abstract: Methods, systems, and devices for wireless communication are described. The method may include transmitting a first synchronization signal in a set of beam directions during a first symbol period of a synchronization subframe and transmitting a second synchronization signal in another set of beam directions during a second symbol period of the synchronization subframe. The second set of beam directions may be spatially interleaved with the first set of beam directions. Additionally, the method may include monitoring a first and second set of beam directions during a first and second symbol period of a random access subframe, respectively. Additionally, the method may include receiving, from a base station, first and second synchronization signals in a synchronization subframe, decoding the first synchronization signal, and transmitting an access request based at least in part on the decoded first synchronization signal.

公开(公告)号：US10219270B2

公开(公告)日：2019-02-26

申请号：US15176484

申请日：2016-06-08

Applicant: QUALCOMM Incorporated

Inventor： Sundar Subramanian ,  Junyi Li ,  Ashwin Sampath ,  Muhammad Nazmul Islam ,  Juergen Cezanne ,  Krishna Kiran Mukkavilli

IPC: H04W72/04 ,  H04W16/28 ,  H04W56/00 ,  H04W72/08 ,  H04L5/00 ,  H04L5/16

Abstract: Aspects of the present disclosure provided techniques for wireless communications by a base station. An exemplary method generally includes transmitting, on a narrowband region within a wider system bandwidth, a directional primary synchronization signal (DPSS), receiving feedback information from one or more user equipments (UEs) based on the DPSS, wherein the feedback information comprises an indication of a bandwidth capability of a UE that transmitted the feedback information, and allocating resources to the one or more UEs within at least one of the wider system bandwidth or the narrowband region based, at least in part, on the feedback information.

公开(公告)号：US20190014500A1

公开(公告)日：2019-01-10

申请号：US15988844

申请日：2018-05-24

Applicant: QUALCOMM Incorporated

Inventor： Navid Abedini ,  Karl Georg Hampel ,  Junyi Li ,  Sundar Subramanian ,  Muhammad Nazmul Islam ,  Juergen Cezanne

IPC: H04W28/08 ,  H04L27/26 ,  H04B7/06 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A wireless node may establish a wireless connection between the wireless node and a second wireless node in a wireless backhaul communications network. The wireless node may identify a first set of common resources for use in at least one of access communications or backhaul communications. The first set of common resources is allocated for common use by the wireless nodes of the wireless backhaul communications network. The wireless node may identify a second set of partitioned resources available for at least one of access communications or backhaul communications. The second set partitioned into a plurality of subsets each allocated for use by selected subsets of one or more of the wireless nodes of the wireless backhaul communications network.

公开(公告)号：US20180367270A1

公开(公告)日：2018-12-20

申请号：US15996811

申请日：2018-06-04

Applicant: QUALCOMM Incorporated

Inventor： Vasanthan Raghavan ,  Miguel Rodrigo Castellanos Llorca ,  Jung Ryu ,  Sundar Subramanian ,  Juergen Cezanne ,  Junyi Li

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

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a first set of transmit beams and an associated first set of receive beams having a channel characteristic that is below a first threshold. The UE may identify, for each receive beam in the first set of receive beams, a transmit beam in a second set of transmit beams having a channel characteristic above a second threshold. The UE may identify a relative channel characteristic value between each transmit beam in the first set of transmit beams and each transmit beam in the second set of transmit beams. The UE may transmit a message that identifies the beams in the first and second set of transmit beams, the identified receive beam from the first set of receive beams for each beam in the first set of transmit beams, and the relative channel characteristic value.

公开(公告)号：US10116483B2

公开(公告)日：2018-10-30

申请号：US15370266

申请日：2016-12-06

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Juergen Cezanne ,  Krishna Kiran Mukkavilli ,  Sundar Subramanian ,  Junyi Li

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04W76/27 ,  H04W88/02 ,  H04W88/08

Abstract: DM-RS symbols may be inserted in the beginning of a subframe, or in two parts of the subframe. In one aspect, a method, a computer-readable medium, and an apparatus for dynamically conveying DM-RS information are provided. The apparatus may be a base station. The apparatus may determine the number of DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols. The apparatus may transmit the number of the DM-RS symbols and/or the locations within the subframe for transmission of the DM-RS symbols to a UE. In another aspect, a UE may receive the number of DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols from a base station. The UE may decode the DM-RS symbols from the subframe based on the number of the DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols.

公开(公告)号：US10097255B2

公开(公告)日：2018-10-09

申请号：US14959671

申请日：2015-12-04

Applicant: QUALCOMM Incorporated

Inventor： Juergen Cezanne ,  Muhammad Nazmul Islam ,  Krishna Kiran Mukkavilli ,  Sundar Subramanian ,  Junyi Li

IPC: H04W4/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04J13/00 ,  H04L27/26

Abstract: Described herein are methods, systems, and apparatus for jointly estimating channel and phase noise in a control symbol. In one example, a method for wireless communication is described that includes inserting a control tone at a first periodicity in a first subcarrier of a control symbol and inserting a pilot tone at a second periodicity in a second subcarrier of the control symbol, the pilot tone being offset from the control tone in the control symbol. The method also includes transmitting the control symbol. In another example, a method for wireless communication is described that includes receiving a control symbol comprising a control tone at a first periodicity, and a pilot tone at a second periodicity, the pilot tone being offset from the control tone in the control symbol. The method also includes performing a phase noise estimation and a channel estimation from the pilot tone.