公开(公告)号：US20180279243A1

公开(公告)日：2018-09-27

申请号：US15922554

申请日：2018-03-15

Applicant: QUALCOMM Incorporated

Inventor： Bilal Sadiq ,  Juergen Cezanne ,  Sundar Subramanian ,  Muhammad Nazmul Islam ,  Navid Abedini ,  Tao Luo

IPC: H04W56/00 ,  H04W72/00 ,  H03M13/09 ,  H04L5/00

Abstract: A user equipment (UE) receives a first synchronization signal (SS) block including a first codeword and a second SS block including a second codeword. Each codeword is based on a linear encoding of a physical broadcast channel (PBCH) payload. The PBCH payloads include different timing indicators. The SS blocks are received at different times separated by a time increment. The UE determines, based on the time increment, one or more hypotheses of combined decoding metrics for the first codeword and the second codeword, and decodes the first codeword based on each of at least one hypothesis in the one or more hypotheses. The at least one hypothesis includes a correct hypothesis. The UE determines the first codeword based on an error detection procedure such as CRC verification performed when decoding the first codeword based on the correct hypothesis.

公开(公告)号：US10075149B2

公开(公告)日：2018-09-11

申请号：US15476887

申请日：2017-03-31

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Junyi Li

IPC: H04B1/18 ,  H03J5/24 ,  H03J7/04 ,  H03J7/18 ,  H03J9/00 ,  H04B7/0417 ,  H04N5/50 ,  H04W74/08

CPC classification number: H03J5/242 ,  H03J7/047 ,  H03J7/186 ,  H03J9/002 ,  H03J2200/27 ,  H04B7/0417 ,  H04B7/0695 ,  H04B7/088 ,  H04N5/50 ,  H04W74/0816

Abstract: Methods and apparatus that support controlled transmission and directional reception of RTS and/or CTS messages, are described. Controlled transmission may include transmitting a same RTS message multiple times in the same direction and/or transmitting an RTS message with a length that is multiple times longer than a standard RTS message. In an aspect, a receiver may determine spatial directions of a plurality of transmitters including a first transmitter and at least one other transmitter, and may perform a beam sweep in the determined spatial directions for receiving one or more RTS messages. A transmitter may determine that a receiver is to perform a beam sweep in K different spatial directions, and may transmit a same RTS message for a data transmission K times in the same direction or an RTS message with a length approximately K times longer than a standard RTS message, during a duration of the beam sweep.

公开(公告)号：US20180205589A1

公开(公告)日：2018-07-19

申请号：US15706183

申请日：2017-09-15

Applicant: QUALCOMM Incorporated

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

IPC: H04L27/26 ,  H04W56/00 ,  H04L25/03 ,  H04L5/00

CPC classification number: H04L27/2672 ,  H04L5/0035 ,  H04L5/005 ,  H04L25/03159 ,  H04L27/2613 ,  H04L27/2646 ,  H04L27/2657 ,  H04W56/0035

Abstract: Methods, systems, and devices for wireless communication are described. Reference signals may be used for estimating frequency offset at a wireless device. For example, a first wireless device may identify a frequency offset estimation request for a second wireless device. The first wireless device may in turn transmit an initialization signal to the second wireless device to estimate the frequency offset, where the initialization signal may identify parameters for the transmission of a reference signal. The reference signal may then be transmitted to the second wireless device, and the second wireless device may estimate the frequency offset. In some examples, the second wireless device may send a request for the reference signal, where the request may include proposed parameters for the transmission of the reference signal. The first wireless device may accept the proposed parameters, or provide different parameters, and transmit the reference signal.

公开(公告)号：US20180131434A1

公开(公告)日：2018-05-10

申请号：US15637885

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/08 ,  H01Q3/26 ,  H04B7/0408 ,  H01Q1/24 ,  H04W16/28 ,  H04B7/06

CPC classification number: H04B7/086 ,  H01Q1/246 ,  H01Q3/2605 ,  H04B7/0408 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0695 ,  H04B7/0814 ,  H04B7/088 ,  H04W16/28 ,  H04W72/046

Abstract: Techniques are described for wireless communication. One method includes performing a first beam sweep procedure to determine a first beam pair that includes a transmit beam of a first wireless node and a receive beam of a second wireless node, identifying a level of correspondence at one or both of the first wireless node and the second wireless node, the level of correspondence being between a transmit beam and a receive beam of a respective wireless node and determining, based on the level of correspondence, a range of a second beam sweep procedure to be performed in determining a second beam pair that includes a transmit beam of the second wireless node and a receive beam of the first wireless node.

公开(公告)号：US20180049245A1

公开(公告)日：2018-02-15

申请号：US15674214

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W72/08 ,  H04W56/00 ,  H04W72/04

CPC classification number: H04W74/0833 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04B7/2665 ,  H04B7/2668 ,  H04B7/2671 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04W16/28 ,  H04W48/20 ,  H04W56/00 ,  H04W56/001 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/046 ,  H04W72/085 ,  H04W72/1236 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a downlink (DL) signal from a base station on one or more DL beam(s). The UE may identify of a nature of correspondence between one or more receive beams at the UE and one or more transmit beams at the UE. The UE may identify a selected DL beam of the one or more DL beam(s) for communications from the base station to the UE. The UE may transmit a random access channel (RACH) message to the base station using a resource and/or a RACH waveform selected based on the selected DL beam based at least in part on the selected DL beam and the nature of correspondence.

公开(公告)号：US20180049177A1

公开(公告)日：2018-02-15

申请号：US15674287

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W74/0833 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04B7/2665 ,  H04B7/2668 ,  H04B7/2671 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04W16/28 ,  H04W48/20 ,  H04W56/00 ,  H04W56/001 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/046 ,  H04W72/085 ,  H04W72/1236 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a downlink (DL) signal from a base station on one or more DL beam(s). The UE may identify a selected DL beam of the one or more DL beam(s) for communications from the base station to the UE. The UE may transmit a beam recovery or beam tracking message to the base station using at least one of a resource or a waveform selected based at least in part on the selected DL beam.

公开(公告)号：US20180034531A1

公开(公告)日：2018-02-01

申请号：US15595328

申请日：2017-05-15

Applicant: QUALCOMM Incorporated

Inventor： Bilal Sadiq ,  Ashwin Sampath ,  Tao Luo ,  Juergen Cezanne ,  Sundar Subramanian ,  Muhammad Nazmul Islam ,  Alexei Yurievitch Gorokhov ,  Shrenik Patel ,  Junyi Li

IPC: H04B7/06 ,  H04W76/02 ,  H04B7/0408

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be communicating with a base station via beamformed transmissions on an active beam. The UE may receive from the base station refined reference signals (RRSs) that include an active beam RRS corresponding to the active beam. The UE may identify that the active beam RRS corresponds to the active beam and perform a beam state measurement on the active beam RRS. The UE may refine the active beam based at least in part on the beam state information of the active beam RRS.

公开(公告)号：US20170353290A1

公开(公告)日：2017-12-07

申请号：US15367475

申请日：2016-12-02

Applicant: QUALCOMM Incorporated

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

IPC: H04L7/00 ,  H04W56/00

CPC classification number: H04L7/0016 ,  H04J11/0069 ,  H04J11/0076 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2636 ,  H04L27/2655 ,  H04L27/2692 ,  H04W56/0015

Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system operating in millimeter wave (mmW) spectrum may utilize synchronization signals for beam tracking. A synchronization signal (e.g., primary synchronization signals (PSS), secondary synchronization signals (SSS), etc.), beam reference signal, and/or control signal may be designed to facilitate beam tracking. A synchronization signal structure based on a repeated sequence in the time domain may facilitate searching for different beams in a timely manner. In some cases, the repeated synchronization signal structure may be achieved by using a larger tone spacing, and hence having shorter symbol duration and repeating the short symbols in the time domain. The repeated structure may be further used to encode additional information (e.g., facilitated by the resulting additional degrees of freedom). Additionally or alternatively, a synchronization signal (e.g., SSS) may be discrete Fourier transform (DFT) pre-coded to achieve better peak-to-average-power-ratio (PAPR).

公开(公告)号：US20170338924A1

公开(公告)日：2017-11-23

申请号：US15372916

申请日：2016-12-08

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W72/04

CPC classification number: H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04W72/0446

Abstract: Methods, systems, and devices for wireless communication are described. A base station and user equipment (UE) may use subframe configurations that include dynamically scheduled channel state information reference signal (CSI-RS) symbols. For example, a base station may identify a subframe configuration that includes one or more sets of CSI-RS symbols of a subframe. The base station may indicate to a UE whether sets of CSI-RS symbols may be enabled or disabled during the subframe. The UE may receive multiple CSI-RSs at different locations within the subframe as indicated by the base station, and transmit CSI feedback to the base station based on at least one of the received CSI-RSs. In some examples, multiple base stations may coordinate the use of subframe configurations that include CSI-RS symbols that may be enabled or disabled.

公开(公告)号：US20170318541A1

公开(公告)日：2017-11-02

申请号：US15355647

申请日：2016-11-18

Applicant: QUALCOMM Incorporated

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

IPC: H04W52/14 ,  H04W72/04 ,  H04W74/08

CPC classification number: H04W52/146 ,  H04B7/0617 ,  H04B7/0695 ,  H04W52/08 ,  H04W52/42 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/046 ,  H04W74/0833

Abstract: Uplink transmission power levels may be adjusted in response to changes in a directional beam used for wireless communications. A beam change may be identified, wherein the beam change includes a transition from a first transmission configuration based on a first beam direction of a cell to a second transmission configuration based on a second beam direction of the cell. A downlink (DL) message associated with the beam change may be received, wherein the DL message comprises a transmission power indication. An uplink (UL) message may be transmitted at a power level based at least in part on the transmission power indication.