公开(公告)号：US11317444B2

公开(公告)日：2022-04-26

申请号：US16177055

申请日：2018-10-31

Applicant: QUALCOMM Incorporated

Inventor： Tianyang Bai ,  Navid Abedini ,  Juergen Cezanne ,  Muhammad Nazmul Islam ,  Junyi Li

IPC: H04W56/00 ,  H04W74/08 ,  H04L27/26 ,  H04L5/00 ,  H04W74/00

Abstract: Aspects of the present disclosure provide for random access channel (RACH) configuration in wireless communication systems. In some examples, a RACH configuration may be selected for use by a scheduled entity in transmitting a RACH signal to a scheduling entity based on an estimated timing advance value. The RACH configuration may include, for example, a transmission time of the RACH signal and/or a RACH waveform configuration identifying at least a cyclic prefix (CP) length and a guard time (GT) for the RACH signal. In some examples, the CP and GT length may each be set to the difference between an estimated maximum round-trip time (RTT) and an estimated minimum RTT between the scheduled entity and the scheduling entity. In some examples, the timing advance value may be estimated as the estimated minimum RTT.

公开(公告)号：US11284409B2

公开(公告)日：2022-03-22

申请号：US16394959

申请日：2019-04-25

Applicant: QUALCOMM Incorporated

Inventor： Wooseok Nam ,  Tao Luo ,  Vasanthan Raghavan ,  Juergen Cezanne ,  Junyi Li ,  Muhammad Nazmul Islam

IPC: H04W72/08 ,  H04L5/00 ,  H04W72/02 ,  H04W72/04 ,  H04B7/08 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described that provide for multiple different receive beams at a user equipment (UE) that may be spatially associated with a single transmission beam from a base station. A UE may measure, using multiple different receive beams, multiple instances of a same reference signal transmitted by the base station using a same transmission beam. The UE may provide measurement reports associated with each of the measurements to the base station. A particular receive beam to be used for a downlink transmission may be selected from the multiple receive beams and may be indicated to the UE.

公开(公告)号：US11206074B2

公开(公告)日：2021-12-21

申请号：US16679793

申请日：2019-11-11

Applicant: QUALCOMM Incorporated

Inventor： Vasanthan Raghavan ,  Jung Ho Ryu ,  Kobi Ravid ,  Juergen Cezanne ,  Junyi Li

IPC: H04W4/00 ,  H04B7/06 ,  H04W24/10 ,  H04W16/28 ,  H04B7/0456

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device may receive a first beam measurement report from a second wireless device, the first beam measurement report indicating a first set of beam measurements for a wireless channel between the first wireless device and the second wireless device. The first wireless device may transmit to the second wireless device a cluster validity metric for at least one beam in the first beam measurement report. The first wireless device may receive from the second wireless device, in response to transmitting the cluster validity metric, a second beam measurement report indicating a second set of beam measurements for the wireless channel. The first wireless device may select a beam for transmitting to the second wireless device based at least in part on the first and second beam measurement reports.

公开(公告)号：US11191061B2

公开(公告)日：2021-11-30

申请号：US15468594

申请日：2017-03-24

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/0408 ,  H04L5/00 ,  H04L25/02 ,  H04W72/02 ,  H04B17/336 ,  H04W16/28 ,  H04W74/08 ,  H04B7/0417

Abstract: When beamforming (e.g., via a millimeter wave system (mmW)) is used for wireless communication, a base station may transmit beams that are directed to certain directions. Due to the directional nature of the beams in the mmW system, an approach to determine a beam that provides a desirable gain is studied. The apparatus may be a user equipment (UE). The apparatus receives, from a base station, a plurality of signals through a plurality of beams of the base station, each of the plurality of beams corresponding to a respective antenna port of a plurality of antenna ports of the base station, where the plurality of signals include a plurality of beam reference signals, a plurality of beam refinement reference signals, a plurality of channel state information reference signals (CSI-RSs), or a combination thereof. The apparatus performs channel estimation for each beam of the plurality of beams from the plurality of antenna ports based on the plurality of signals.

公开(公告)号：US11172407B2

公开(公告)日：2021-11-09

申请号：US16270139

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Navid Abedini ,  Jianghong Luo ,  Bilal Sadiq ,  Muhammad Nazmul Islam ,  Karl Georg Hampel ,  Hong Cheng ,  Juergen Cezanne ,  Junyi Li

IPC: H04W28/26 ,  H04W72/04 ,  H04W72/12 ,  H04W24/10 ,  H04W28/02 ,  H04W8/22 ,  H04B7/0413 ,  H04L5/00 ,  H04W16/02 ,  H04W16/28 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communications are described that provide for partitioning of time-frequency resources for types of traffic separately. A centralized scheduler in a centralized system or a set of access nodes (ANs) in a distributed system may allocate a portion of a set of resources for a first traffic type (e.g., control or data traffic). In some cases, multiple ANs may exchange reports or measurements to determine the resources to allocate to a given traffic type. The allocated resources may be repurposed for use by a different traffic type (e.g., data traffic resources may be repurposed an used for control traffic resources) in order to account for varying traffic conditions (e.g., unscheduled control traffic).

公开(公告)号：US11095353B2

公开(公告)日：2021-08-17

申请号：US16741175

申请日：2020-01-13

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Juergen Cezanne ,  Ashwin Sampath ,  Joseph Patrick Burke ,  Dai Lu ,  Junyi Li

IPC: H04B7/06 ,  H03M1/14 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device, such as a base station and/or a user equipment (UE), may select a first resolution for a first analog-to-digital or digital-to-analog conversion process associated with a first wireless communication. The wireless device may determine that the first wireless communication is performed according to the first resolution. The wireless device may select, based at least in part on the determining, a second resolution for a second analog-to-digital or digital-to-analog conversion process associated with a second wireless communication, the first resolution being a lower resolution than the second resolution.

公开(公告)号：US11075725B2

公开(公告)日：2021-07-27

申请号：US16522575

申请日：2019-07-25

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/08 ,  H04W72/04 ,  H04W74/00 ,  H04W72/08 ,  H04W88/08

Abstract: One apparatus may be configured to detect a set of beams from a base station. The apparatus may be further configured to select a beam of the set of beams. The apparatus may be further configured to determine at least one resource based on the selected beam. The apparatus may be further configured to transmit, on the at least one determined resource, a beam adjustment request to the base station. The request may indicate an index associated with the selected beam. Another apparatus may be configured to transmit a first set of beams. The other apparatus may be further configured to receive a beam adjustment request on at least one resource. The other apparatus may be further configured to determine a beam index of a beam in the first set of beams based on the request and the at least one resource.

公开(公告)号：US20210194551A1

公开(公告)日：2021-06-24

申请号：US17082529

申请日：2020-10-28

Applicant: QUALCOMM Incorporated

Inventor： Vasanthan Raghavan ,  Junyi Li ,  Kapil Gulati ,  Juergen Cezanne

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/02

Abstract: Methods, systems, and devices for wireless communications are described for implementation of higher rank transmissions (e.g., higher rank line of sight (LOS) schemes) over a given beam direction associated with a selected transmission configuration indicator (TCI) state. According to some aspects, expanded antenna arrays, spatial separation (e.g., distance) between antenna elements, lower carrier frequencies (e.g., associated with frequency range 4 (FR4) systems), etc. may be leveraged to communicate uncorrelated signals (e.g., independent streams across spatial layers) for higher rank transmissions using a given TCI state (e.g., using a single beam direction). Various aspects of the described techniques may provide for higher rank directional communications by a user equipment (UE) (e.g., via uncorrelation in a single UE), higher rank directional communications by select UEs (e.g., via uncorrelation across specific UEs), base station antenna selection for uncorrelation at multiple served UEs, etc.

公开(公告)号：US11044072B2

公开(公告)日：2021-06-22

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 ,  H04J11/00 ,  H04L5/00 ,  H04L27/26

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：US11039499B2

公开(公告)日：2021-06-15

申请号：US16033013

申请日：2018-07-11

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Ashwin Sampath ,  Sundar Subramanian ,  Juergen Cezanne ,  Sumeeth Nagaraja ,  Jianghong Luo

IPC: H04W56/00 ,  H04W76/28 ,  H04L5/00 ,  H04W52/02 ,  H04B7/06 ,  H04B7/08 ,  H04W72/04 ,  H04W16/28

Abstract: Methods, systems, and devices for wireless communication are described for discontinuous reception (DRX) wake up procedures over millimeter wave (mmW) frequency resources. A base station may use multiple antenna ports to transmit one or more beamformed downlink transmissions to a user equipment (UE). The downlink transmissions may include beam-swept reference signals, and the UE may initiate a wake up procedure prior to a configured DRX-On cycle to receive the reference signals. Based on the reception of the reference signals, the UE may train a set of receive beams and determine a preferred downlink transmit beam. The base station may subsequently transmit at least a portion of a cell radio network temporary identifier (C-RNTI) in a beam-swept manner, and the UE may evaluate the C-RNTI transmission on the preferred transmit beam. The UE may also transmit an uplink response indicating the preferred transmit beam to receive downlink data.