公开(公告)号：US10609661B2

公开(公告)日：2020-03-31

申请号：US15968598

申请日：2018-05-01

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00 ,  H04W72/04 ,  H04L5/00 ,  H04L1/00 ,  H04W48/12 ,  H04L27/26

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for conveying timing information that changes across a transmission time interval (TTI) in which multiple redundancy versions of a physical broadcast channel (PBCH) are transmitted.

公开(公告)号：US10560243B2

公开(公告)日：2020-02-11

申请号：US15711157

申请日：2017-09-21

Applicant: QUALCOMM Incorporated

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

IPC: H04W36/00 ,  H04W72/00 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04

Abstract: An apparatus for wireless communication selects a recommendation for the need. The apparatus selects the resource to transmit a phase tracking reference signal based on a condition of a communication system. The apparatus performs at least one of transmitting an indication of the selected recommendation for the resource to a second wireless communication device or transmitting at least one of information or a reference signal to the second device to assist the second device in determining the resource. In an aspect, the selection may be made based on receiving a request for a recommendation from the second wireless communication device or the transmitting the at least one of the information or the reference signal are based on a request received.

公开(公告)号：US10548100B2

公开(公告)日：2020-01-28

申请号：US15462629

申请日：2017-03-17

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Ozge Koymen ,  Navid Abedini ,  Sundar Subramanian ,  Junyi Li

IPC: H04W16/28 ,  H04W56/00 ,  H04B7/0408 ,  H04L1/00 ,  H04L5/00 ,  H04B7/06

Abstract: The base station that is configured to transmit in a beamformed manner may set different transmission rates for different directions of the beams. During an initial access stage, the base station may set different transmission rates for different transmission directions, and may transmit initial access signals based on the transmission rates in the different transmission directions The apparatus may be a base station. The base station determines transmission rates for a plurality of transmission directions, where each transmission rate is determined for a respective transmission direction of the plurality of transmission directions. The base station transmits at least one initial access signal in each of one or more of the plurality of transmission directions based on a corresponding transmission rate of the transmission rates.

公开(公告)号：US10547418B2

公开(公告)日：2020-01-28

申请号：US14301312

申请日：2014-06-10

Applicant: QUALCOMM Incorporated

Inventor： Jung Ho Ryu ,  Sundar Subramanian ,  Junyi Li ,  Ashwin Sampath ,  Karl Georg Hampel

IPC: H04L5/00 ,  H04W72/04 ,  H04W36/00 ,  H04W72/08 ,  H04W88/08

Abstract: In a first configuration, the apparatus may be a base station. The base station adjusts a periodicity for performing a beam sweep, sends information indicating the adjusted periodicity for performing a beam sweep, and performs the beam sweep at the adjusted periodicity. In a second configuration, the apparatus may be a UE. The UE receives information indicating a periodicity for performing a beam sweep from a base station, adjusts the periodicity for performing the beam sweep, and performs the beam sweep at the adjusted periodicity. For both configurations, the beam sweep is a plurality of transmissions of a beam in a plurality of different transmit spatial directions by one of the base station or the UE and a plurality of scans of the beam transmissions in a plurality of different scan spatial directions by an other of the one of the base station or the UE.

公开(公告)号：US10448380B2

公开(公告)日：2019-10-15

申请号：US15420204

申请日：2017-01-31

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Tingfang Ji ,  Jing Jiang ,  Junyi Li

IPC: H04W72/04 ,  H04L5/14 ,  H04L5/00 ,  H04W76/27 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communication provide for split symbol control by varying tone spacing and symbol duration for control channels in a subframe. The control symbols may be transmitted at various locations within the subframe and may be transmitted to different mobile devices. In some examples, multiple control symbols may be transmitted in a subframe to multiple mobile devices depending on the capabilities of each of the multiple mobile devices.

公开(公告)号：US10404433B2

公开(公告)日：2019-09-03

申请号：US15826612

申请日：2017-11-29

Applicant: QUALCOMM Incorporated

Inventor： Juergen Cezanne ,  Vasanthan Raghavan ,  Bilal Sadiq ,  Sundar Subramanian ,  Ashwin Sampath ,  Junyi Li

IPC: H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04B7/0408

Abstract: Techniques are described for wireless communication. A method of wireless communication at a first wireless device includes identifying a template mapping of a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods of a template time-frequency resource grid; mapping a plurality of resource elements of an orthogonal frequency-division multiplexing (OFDM) time-frequency resource grid to the plurality of ports based at least in part on the template mapping; receiving a reference signal from a second wireless device, on a subset of the plurality of ports, based at least in part on the mapping; and decoding the reference signal from a subset of the plurality of resource elements based at least in part on the mapping. In some cases, each port of the plurality of ports is associated with a corresponding radio frequency (RF) chain.

公开(公告)号：US10367616B2

公开(公告)日：2019-07-30

申请号：US15357812

申请日：2016-11-21

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W52/36 ,  H04W72/04 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a sounding reference signal (SRS) configuration for user equipment (UE). The base station may transmit an SRS grant message to a UE indicating the SRS configuration. An indication of SRS parameters may be included in the SRS grant message, and may include the SRS parameters or a location of the SRS parameters. That is, SRS parameters may be transmitted in a control channel with the SRS grant message or may be separately sent in a data channel as indicated by the indication of SRS parameters. In some cases, SRS parameters may be determined based on previously received UE feedback regarding channel conditions or power limitations. Alternatively, the base station may make its own environment measurements or assign SRS parameters autonomously. The UE may signal SRS transmissions to the base station according to the SRS grant message.

公开(公告)号：US10356823B2

公开(公告)日：2019-07-16

申请号：US15357951

申请日：2016-11-21

Applicant: QUALCOMM Incorporated

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

IPC: H04L27/26 ,  H04W72/04 ,  H04W74/08

Abstract: A user equipment (UE) may transmit a random access message to a wireless node using multiple symbols. The random access message may include repetitions of a random access sequence weighted by a spreading code. For example, a random access sequence may be weighted using different elements of the spreading code, where a first repetition may be weighted with a first element and a second repetition may be weighted using a second element. The weighted random access signals may be spread over multiple symbols and transmitted to the wireless node as the random access message. In some cases, a spreading code may include values of one and negative one, may be based on rows of a Hadamard matrix, or may correspond to a number of symbols used to transmit the random access message.

公开(公告)号：US10341946B2

公开(公告)日：2019-07-02

申请号：US15967073

申请日：2018-04-30

Applicant: QUALCOMM Incorporated

Inventor： Navid Abedini ,  Sundar Subramanian ,  Muhammad Nazmul Islam ,  Tao Luo ,  Bilal Sadiq ,  Hung Ly ,  Heechoon Lee ,  Haitong Sun

IPC: H04W4/00 ,  H04W48/16 ,  H04W56/00 ,  H04L12/58 ,  H04W4/12 ,  G06Q50/00 ,  H04W8/24 ,  H04M1/725

Abstract: In order to improve cell detection in NR, a user equipment apparatus performs a PSS search on a first frequency raster from a group of frequency rasters. When the UE detects a PSS on the first frequency raster corresponding to a PSS hypothesis, the UE searches for an SS on a second frequency raster based at least on part on the detected PSS hypothesis on the first frequency raster. The UE may search for a plurality of hypotheses of the SS corresponding to the detected PSS hypothesis on the first frequency raster and the second frequency raster. The second frequency raster may be selected from the group of frequency rasters based at least in part on the detected PSS hypothesis or the first frequency raster on which the PSS was detected.

公开(公告)号：US20190191399A1

公开(公告)日：2019-06-20

申请号：US16193736

申请日：2018-11-16

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Navid Abedini ,  Bilal Sadiq ,  Peter Pui Lok Ang ,  Sundar Subramanian ,  Junyi Li ,  Sony Akkarakaran

IPC: H04W56/00 ,  H04W72/04 ,  H04W72/12

CPC classification number: H04W56/005 ,  H04W56/009 ,  H04W72/042 ,  H04W72/046 ,  H04W72/1268

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for adjusting timing advance command parameters for specific beam pair links (BPLs) in a wireless communications system. In some cases, a base station may determine that transmission timing at a UE may be misaligned. The may send a timing advance (TA) command for the BPL. A UE may utilize more than one BPL, and may switch communications from a first BPL to second BPL. The second BPL may have a different timing misalignment than the first BPL, and the TA command sent by the base station may be insufficient to correct the timing misalignment of the second BPL. The base station may adjust the TA command parameters (e.g., TA command size or TA command granularity) so that the timing misalignment of the second BPL may be corrected.