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：US20190141692A1

公开(公告)日：2019-05-09

申请号：US16153509

申请日：2018-10-05

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00

Abstract: When a first node is subject to a maximum permissible exposure (MPE) condition, it may be beneficial for the first node to signal, to a second node, an uplink beam to be used for communications and/or one or more properties of the uplink beam. For example, the first node may signal a downlink beam, from a first reciprocal beam pair, and an uplink beam, from a second reciprocal beam pair, to be used for communications, and/or may signal one or more properties of the uplink beam and/or the downlink beam. Additionally, or alternatively, the second node may transmit, to the first node, a signaling state (e.g., a transmission configuration indication (TCI) state) that indicates properties to be used to configure an uplink beam and/or a downlink beam. In this way, the first node and the second node may configure beams in a manner that accounts for MPE limitations.

公开(公告)号：US20190132040A1

公开(公告)日：2019-05-02

申请号：US16162015

申请日：2018-10-16

Applicant: QUALCOMM Incorporated

Inventor： Tianyang Bai ,  Navid Abedini ,  Juergen Cezanne ,  Muhammed Nazmul Islam ,  Vasanthan Raghavan ,  Jianghong Luo ,  Sundar Subramanian ,  Junyi Li

IPC: H04B7/06 ,  H04B7/0408 ,  H04B7/185 ,  H04B17/309

Abstract: High frequency wireless communication networks rely on directional transmit and receive beams to achieve large gains and overcome large pathlosses associated with high frequency signals. With highly directional signals, link failure may occur. Network nodes associated with the link failure, may need to identify new beam pairs and establish a new link as quickly as possible. In several aspects, beam sweep procedures are expedited, allowing for rapid link reestablishment. Disclosed techniques allow for rapid link reestablishment with and without beam correspondence.

公开(公告)号：US10237857B2

公开(公告)日：2019-03-19

申请号：US15468825

申请日：2017-03-24

Applicant: QUALCOMM Incorporated

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

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

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. 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. The apparatus transmits, to the base station, a feedback signal including information about one or more beams selected from the plurality of beams, the feedback signal further including one or more candidate uplink precoders.

公开(公告)号：US20180287841A1

公开(公告)日：2018-10-04

申请号：US15943518

申请日：2018-04-02

Applicant: QUALCOMM Incorporated

Inventor： Sundar Subramanian ,  Alexei Yurievitch Gorokhov ,  Junyi Li ,  Juergen Cezanne ,  Ashwin Sampath

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2611 ,  H04B7/04 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0695 ,  H04B7/088 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2613 ,  H04W24/10 ,  H04W72/0406 ,  H04W72/0446 ,  H04W72/046

Abstract: Methods, systems, and devices for wireless communication are described in which a number of reference signal processes may be configured for a number of slots in a radio frame, and a corresponding reference signal process for each slot may be based at least in part on a location of the slot within the radio frame and a number of configured reference signal processes. An indication may be provided to a user equipment (UE) in each slot that indicates a presence or absence of a reference signal transmission in the slot.

公开(公告)号：US20180279271A1

公开(公告)日：2018-09-27

申请号：US15921026

申请日：2018-03-14

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04J11/00 ,  H04L27/26 ,  H04L5/00

Abstract: Techniques are described for wireless communication. In one method, a user equipment (UE) receives a timing synchronization signal (TSS) and a physical broadcast channel (PBCH), with the TSS based at least in part on a timing of the TSS within a broadcast channel transmission time interval (BCH TTI); determines the timing of the TSS within the BCH TTI; and demodulates the PBCH based at least in part on the TSS. In another method, a base station allocates resources for a TSS and a PBCH within a BCH TTI; determines the TSS based at least in part on a timing of the TSS within the BCH TTI; and transmits, on the resources allocated for the TSS and the PBCH, the TSS and the PBCH, with the TSS transmitted as a demodulation reference signal (DMRS) for the PBCH on at least one port used to transmit the TSS and the PBCH.

公开(公告)号：US20180205585A1

公开(公告)日：2018-07-19

申请号：US15871734

申请日：2018-01-15

Applicant: QUALCOMM Incorporated

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

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/08 ,  H04B7/06 ,  H04B7/0408

CPC classification number: H04L27/2613 ,  H04B7/0408 ,  H04B7/0695 ,  H04B7/088 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/14 ,  H04L27/2611

Abstract: Methods, systems, and devices for wireless communication are described. Beams used for synchronization signals may be associated with beams used for reference signals. For example, a base station may identify a first set of millimeter wave (mmW) communication beams to transmit a synchronization signal. The base station may transmit the synchronization signal and identify a second set of mmW communication beams to transmit a reference signal, where the second set of mmW communication beams may be associated with the first set of beams. For instance, the first set and second set of mmW communication beams may be the same or similar. The base station may then transmit the reference signal on the second set of mmW communication beams. A user equipment may in turn identify the first and second sets of beams as being associated, and receive the reference signal on the second set of mmW communication beams.

公开(公告)号：US20170347358A1

公开(公告)日：2017-11-30

申请号：US15663542

申请日：2017-07-28

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/0456 ,  H04W72/08 ,  H04B7/08

CPC classification number: H04W72/0466 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/0874 ,  H04W72/085

Abstract: Methods, systems, and devices are described for wireless communication at a user equipment (UE). A wireless communications system may improve UE discovery latency by dynamically selecting and switching beam forming codebooks at the millimeter wave base station and the wireless device. Selecting an optimal beam forming codebook may allow the wireless communication system to improve link margins between the base station without compromising resources. In some examples, a wireless device may determine whether the received signals from the millimeter wave base station satisfy established signal to noise (SNR) thresholds, and select an optimal beam codebook to establish communication. Additionally or alternately, the wireless device may further signal the selected beam codebook to the millimeter wave base station and direct the millimeter wave base station to adjust its codebook based on the selection.

公开(公告)号：US20170332406A1

公开(公告)日：2017-11-16

申请号：US15371978

申请日：2016-12-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W52/34 ,  H04W52/24 ,  H04W52/36 ,  H04W16/28

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a number of beam directions that satisfy a transmission power condition. The UE may select a beam direction for a random access signal by choosing one of the beam directions that satisfies additional criteria, such as transmitting a random access message at the next opportunity. The transmission power may be selected based on a target receive power and a path loss for the selected beam. In some cases, if the sum of the path loss for a beam direction and the target receive power exceeds a maximum transmission power by more than a predetermined amount, the random access signal will not be transmitted using that beam. In some cases, if a response to the random access is not received, a different beam direction may be selected, the transmission power may be increased, or both.

公开(公告)号：US20170302352A1

公开(公告)日：2017-10-19

申请号：US15369069

申请日：2016-12-05

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/06 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04B7/0626 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0057 ,  H04L25/0204 ,  H04L25/0228 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/082

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a phase noise correction reference signal (PC-RS) and a channel state information reference signal (CSI-RS) during a symbol period of a subframe. A user equipment (UE) may identify a first channel information using the PC-RS and the CSI-RS. The UE may transmit a channel information message to the base station that includes the first channel information. The first channel information may include a phase noise corrected channel measurement. The UE may the CSI-RS during the symbol period. Channel and phase noise estimates may be generated using a joint estimation based on the CSI-RS. The CSI-RS may be repeated periodically. In some cases, the UE may additionally or alternatively receive pilot tones that may include PC-RSs. The joint estimation may be further based on the pilot tones.