公开(公告)号：US11316798B2

公开(公告)日：2022-04-26

申请号：US16267721

申请日：2019-02-05

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Guotong Wang ,  Alexei Davydov ,  Hong He ,  Gang Xiong

IPC: H04L12/911 ,  H04L47/74 ,  H04L41/0668 ,  H04W72/04 ,  H04L41/0677 ,  H04L43/08 ,  H04W76/18 ,  H04W24/10 ,  H04W36/00 ,  H04L43/10 ,  H04L43/16 ,  H04L41/0893

Abstract: Systems, apparatuses, and methods for control signaling of beam failure detection are disclosed. A beam pair link may be comprised of multiple bandwidth parts (BWPs) or component carriers (CCs). In one embodiment, a beam failure detection reference signal (BFD RS) may be configured, with subsequent BFD RS instances defining a BFD RS periodicity. A BFD periodicity for monitoring the BFD RS may be configured to be less than, or equal or greater than the BFD RS periodicity. A beam failure may be declared if a minimum number of BFD RS instances, either within the BFD periodicity, or nearest the BFD periodicity if no instances fall within the BFD periodicity, fall below a predetermined threshold. The BFD periodicity and BFD RS may be configured for all BWPs/CCs, a subset of BWPs/CCs, or each individual BWP/CC.

公开(公告)号：US20210352655A1

公开(公告)日：2021-11-11

申请号：US17273369

申请日：2019-09-03

Applicant: APPLE INC.

Inventor： Gang Xiong ,  Yushu Zhang ,  Guotong Wang

IPC: H04W72/04 ,  H04W72/14 ,  H04W72/02 ,  H04L5/00

Abstract: Technology for a user equipment (UE) operable to multiplex uplink control information (UCI) on a physical uplink shared channel (PUSCH) is disclosed. The UE can determine a symbol duration of the PUSCH. The UE can select a UCI transmission rule in accordance with the symbol duration of the PUSCH when a physical uplink control channel (PUCCH) resource carrying UCI overlaps with more than one PUSCH resource in time within a PUCCH group. The UE can multiplex the UCI on a selected PUSCH resource from the more than one PUSCH resource in accordance with the UCI transmission rule.

公开(公告)号：US10985848B2

公开(公告)日：2021-04-20

申请号：US16483982

申请日：2018-05-15

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Wook Bong Lee ,  Dae Won Lee ,  Seunghee Han ,  Alexei Davydov ,  Guotong Wang ,  Gregory Morozov

IPC: H04B17/327 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/08

Abstract: Provided herein are method and apparatus for perform radio link monitoring (RLM) based on a Reference signal (RS). An embodiment provides a user Equipment (UE) comprising circuitry configured to: decode a Reference Signal (RS) received from an access node; and determine beam quality for one or more beam pair links (BPLs) of the RS between the UE and the access node based on the decoded RS, wherein each of the BPLs comprises a transmit (Tx) beam of the access node and a receive (Rx) beam of the UE. Also provided is a procedure of RLM. At least some embodiments allow for beam recovery request for UE beam refinement, and allow for determining whether radio link failure (RLF) occurs.

公开(公告)号：US10966183B2

公开(公告)日：2021-03-30

申请号：US16245970

申请日：2019-01-11

Applicant: APPLE INC.

Inventor： Guotong Wang ,  Alexei Davydov ,  Yushu Zhang

IPC: H04W72/04 ,  H04L5/00 ,  H04W68/02 ,  H04W48/10 ,  H04W72/14 ,  H04W48/12 ,  H04B7/06 ,  H04B7/08 ,  H04W56/00 ,  H04W74/08

Abstract: Technology for a user equipment (UE) configured to perform beam failure recovery. The UE can encode a beam failure recovery (BFR) request for transmission on a physical random-access channel (PRACH) or a physical uplink control channel (PUCCH) to a next generation node B (gNB). The UE can monitor a dedicated physical downlink control channel (PDCCH) control resource set (CORESET) for a response from the gNB to the beam failure recovery request. The UE can select a default physical downlink shared channel (PDSCH) beam, wherein it is assumed, at the UE that a same quasi co-location (QCL) assumption for a PDSCH as a QCL assumption for the dedicated PDCCH CORESET; or a PDSCH demodulation reference signal (DMRS) is QCLed with a downlink (DL) reference signal (RS) of an identified candidate beam by the UE. The UE can decode a beam failure recovery request response from the gNB.

公开(公告)号：US20200186226A1

公开(公告)日：2020-06-11

申请号：US16792781

申请日：2020-02-17

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Gang Xiong ,  Honglei Miao ,  Hong He ,  Guotong Wang ,  Alexei Vladimirovich Davydov ,  Seunghee Han ,  Avik Sengupta

IPC: H04B7/06 ,  H04L1/00 ,  H04W76/27 ,  H04B7/0456 ,  H04W52/16 ,  H04W52/26

Abstract: User equipment (UE) can include processing circuitry configured to decode radio resource control (RRC) signaling from a base station, the RRC signaling indicating a transmission coding scheme for a physical uplink shared channel (PUSCH) transmission. PUSCH-to-phase tracking reference signal (PT-RS) energy per resource element (EPRE) ratio is determined using the RRC signaling. A PT-RS power boosting factor is determined based on the transmission coding scheme and the PUSCH-to-PT-RS EPRE ratio. The PT-RS is encoded for transmission using a plurality of PT-RS symbols, the transmission to using increased transmission power corresponding to the PT-RS power boosting factor. The RRC signaling further includes a flag enabling the PT-RS transmission. The PUSCH-to-PT-RS EPRE ratio is 00 or 01, and the transmission coding scheme is a codebook-based uplink transmission or non-codebook-based uplink transmission.

公开(公告)号：US12177151B2

公开(公告)日：2024-12-24

申请号：US17286341

申请日：2019-10-16

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Alexei Davydov ,  Yushu Zhang

IPC: H04W72/23 ,  H04L1/00 ,  H04L5/00 ,  H04W72/0446 ,  H04W72/0453

Abstract: Embodiments of the present disclosure describe methods, apparatuses, storage media, and systems for mapping a phase-tracking reference signal to resource elements. Other embodiments may be described and claimed.

公开(公告)号：US12156169B2

公开(公告)日：2024-11-26

申请号：US18101101

申请日：2023-01-24

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Guotong Wang ,  Alexei Davydov ,  Gang Xiong

IPC: H04L5/00 ,  H04L1/20 ,  H04W56/00 ,  H04W64/00 ,  H04W72/0446 ,  H04W72/30 ,  H04W76/28 ,  H04W80/08

Abstract: Described is an apparatus of a User Equipment (UE) operable to communicate with a fifth-generation Evolved Node-B (gNB) on a wireless network. The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to process a Tracking Reference Signal (TRS) transmission and to process a Synchronization Signal block (SS-block) transmission. The second circuitry may be operable to measure a reference signal parameter based on the TRS transmission and the SS-block transmission.

公开(公告)号：US20240373268A1

公开(公告)日：2024-11-07

申请号：US18774562

申请日：2024-07-16

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Hua Li ,  Manasa Raghavan ,  Yushu Zhang ,  Jie Cui

IPC: H04W24/08 ,  H04L5/00

Abstract: Systems, apparatuses, methods, and computer-readable media are provided for performing Beam Failure Detection (BFD), and in particular, for performing Synchronization Signal Block (SSB) based BFD and/or Channel State Information Reference Signal (CSI-RS) based BFD. Disclosed embodiments include quasi co-location (QCL) and use case restrictions for SSB for BFD and Physical Downlink Control Channel (PDCCH), transition period handling for BFD, and implicit configuration SSB for BFD. Other embodiments may be described and/or claimed.

公开(公告)号：US12101187B2

公开(公告)日：2024-09-24

申请号：US17438663

申请日：2020-05-01

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Guotong Wang ,  Gang Xiong ,  Yingyang Li ,  Alexei Davydov

IPC: H04L1/16 ,  H04L1/00 ,  H04L1/1607 ,  H04L5/00

CPC classification number: H04L1/1671 ,  H04L1/0027 ,  H04L5/0032 ,  H04L5/0051

Abstract: Systems, devices, and techniques for beamforming in wireless communication systems are described. A described technique performed by a user equipment (UE) includes monitoring a downlink reference signal from a base station; transmitting, via a physical uplink shared channel (PUSCH) associated with a hybrid automatic repeat request (HARQ) process number, a beam failure recovery request (BFRQ) in response to a change in a quality of the downlink reference signal, wherein the BFRQ comprises new beam information; receiving, by the UE, a downlink control information (DCI) message to trigger a PUSCH transmission corresponding to the HARQ process number; and transmitting, by the UE after at least a predetermined number of symbols from a last symbol of a physical downlink control channel (PDCCH) reception containing the DCI message, information via a PUCCH in accordance with the new beam information. The UE can apply the new beam information to uplink and downlink channels.

公开(公告)号：US12088387B2

公开(公告)日：2024-09-10

申请号：US17428488

申请日：2020-02-14

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Yushu Zhang ,  Gang Xiong ,  Alexei Davydov

IPC: H04B7/06 ,  H04W16/28

CPC classification number: H04B7/0695 ,  H04W16/28

Abstract: Disclosed herein are system, method, and computer program product embodiments for performing beam failure recovery. An embodiment operates by detecting a beam failure on a secondary cell (SCell). The embodiment transmits, to a base station, a beam failure recovery request (BFRQ) for the SCell over a primary cell (PCell). The embodiment transmits the BFRQ for the SCell over a Primary Uplink Control Chanel (PUCCH), a Physical Random Access Channel (PRACH), or a Primary Uplink Shared Channel (PUSCH) over the PCell. The embodiment can transmit a schedule request (SR) to allocate a PUSCH over the PCell. The embodiment receives, from the base station, a response for the BFRQ for the SCell over the SCell or the PCell. The embodiment then uses a new beam for the SCell based on the response for the BFRQ for the SCell.