公开(公告)号：US11083003B2

公开(公告)日：2021-08-03

申请号：US15324441

申请日：2015-03-26

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Seunghee Han ,  Debdeep Chatterjee ,  Jong-Kae Fwu

IPC: H04W72/12 ,  H04L5/00 ,  H04W4/70 ,  H04W72/04 ,  H04W72/14

Abstract: Narrowband Physical Downlink Control Channel (PDCCH) implementations are discussed. An example Evolved NodeB (eNB) comprises a memory storing instructions, a processor configured to execute the instructions, and a transmitter circuit. The processor is configured to determine at least one of downlink or uplink scheduling for one or more machine-type communication (MTC)-enabled user equipments (UEs); to generate, based at least in part on the determined scheduling, one or more MTC-physical downlink control channel (PDCCH) signals (M-PDCCH signals) associated with the one or more MTC-enabled UEs; and to perform channel coding, multiplexing, and scrambling of the one or more M-PDCCH signals. The transmitter circuit is configured to map the one or more M-PDCCH signals to resource element groups (REGs) in order of increasing subcarrier followed by orthogonal frequency division multiplexing (OFDM) symbol and to transmit the one or more M-PDCCH signals via a narrowband bandwidth of less than 1.4 MHz.

公开(公告)号：US20210176745A1

公开(公告)日：2021-06-10

申请号：US17181797

申请日：2021-02-22

Applicant: Apple Inc.

Inventor： Ralf Matthias Bendlin ,  Gang Xiong ,  Jong-Kae Fwu ,  Hong He ,  Yushu Zhang ,  Seunghee Han ,  Yuan Zhu

IPC: H04W72/04 ,  H04L5/00 ,  H04B1/7143 ,  H04L27/26

Abstract: Methods and apparatus are described for transmitting uplink control information (UCI) over an OFDMA-based uplink. In some embodiments, UCI symbols are mapped to resource elements (REs) in the time/frequency resource grid to maximize frequency diversity. In some embodiments, UCI is mapped in a manner that takes into account channel estimation performance by mapping UCI symbols to those REs that are closest (in terms of OFDM subcarriers/symbols) to REs that carry reference signals.

公开(公告)号：US11006425B2

公开(公告)日：2021-05-11

申请号：US16476127

申请日：2018-02-02

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Yongjun Kwak ,  Hong He ,  Seunghee Han ,  Qian Li

IPC: H04W72/04 ,  H04J4/00 ,  H04L5/00 ,  H04L5/14

Abstract: Techniques discussed herein can facilitate handling of DL (Downlink) control and data channels having different numerologies in NR (New Radio). One example embodiment comprises an apparatus employable by a UE (User Equipment) configured to generate a report comprising capability information associated with the UE, wherein the capability information indicates whether the UE supports multiplexing of multiple numerologies within a common symbol in a FDM (Frequency Division Multiplexing)-based manner; process first higher layer signaling that configures one or more control resource sets of a NR (New Radio) PDCCH (Physical Downlink Control Channel), wherein the one or more control resource sets are associated with one or more numerologies in accordance with the UE capability information; and demodulate a NR PDSCH (Physical Downlink Shared Channel) from a resource distinct from resources of the NR PDCCH.

公开(公告)号：US11006401B2

公开(公告)日：2021-05-11

申请号：US16192271

申请日：2018-11-15

Applicant: Apple Inc.

Inventor： Debdeep Chatterjee ,  Gang Xiong ,  Seunghee Han

IPC: H04W72/04 ,  H04L1/18 ,  H04L1/00

Abstract: Systems, apparatus, user equipment (UE), evolved node B(eNB), and methods are described for machine-type communications (MTC) with early termination of repeated transmissions. In MTC implementations with narrow bandwidth, significant numbers of retransmissions may be scheduled based on channel quality measurements. If data is successfully decoded at a receiving device while a significant number of retransmissions remain, system resources are wasted. Embodiments described herein thus use downlink control messaging or intermediate hybrid automatic repeat request (HARQ) messaging for early termination of repeated messages.

公开(公告)号：US20210050887A1

公开(公告)日：2021-02-18

申请号：US17087444

申请日：2020-11-02

Applicant: Apple Inc.

Inventor： Dae Won Lee ,  Seunghee Han ,  Ajit Nimbalker ,  Alexei Davydov ,  Paul C. Wei ,  Dmitry Dikarev

IPC: H04B7/0413 ,  H04L1/00 ,  H04L5/00

Abstract: Embodiments of a Generation Node-B (gNB), User Equipment (UE) and methods for communication are generally described herein. The gNB may map data symbols to resource elements (REs) of virtual resource blocks (VRBs). The gNB may interleave the data symbols, on a per-VRB basis, to spatial layers of a multi-layer multiple-input multiple-output (MIMO) transmission. The data symbols may be interleaved based on different interleave patterns of VRB indexes for the spatial layers. The gNB may map the interleaved data symbols of the spatial layers to REs of physical resource blocks (PRBs) for orthogonal frequency division multiplexing (OFDM) transmission.

公开(公告)号：US10862605B2

公开(公告)日：2020-12-08

申请号：US15770853

申请日：2016-04-01

Applicant: Apple Inc.

Inventor： Qiaoyang Ye ,  Hwan-Joon Kwon ,  Seunghee Han ,  Abhijeet Bhorkar ,  Jeongho Jeon

IPC: H04J11/00 ,  H04W16/10 ,  H04W16/14 ,  H04W16/32 ,  H04W74/08

Abstract: A base station for secondary-cell (S-cell) operation in an unlicensed band is subject to listen-before-talk (LBT) rules. The apparatus generates S-cell discovery reference signal (DRS) that includes a primary synchronization signal (PSS) based on a cell ID associated with the base station, a secondary synchronization signal (SSS), a cell-specific reference signal (CRS), and optionally CSI-RS. Solutions are described for generating portions of the DRS to accommodate the placement of the DRS in arbitrary subframes.

公开(公告)号：US10771987B2

公开(公告)日：2020-09-08

申请号：US15935402

申请日：2018-03-26

Applicant: Apple Inc.

Inventor： Konstantinos D. Dimou ,  Gang Xiong ,  Seunghee Han ,  Hong He

IPC: H04W24/02 ,  H04W48/12 ,  H04W24/08 ,  H04W74/08 ,  H04W74/00 ,  H04W36/08

Abstract: Embodiments of a User Equipment (UE) to operate in accordance with a physical random access channel (PRACH) are disclosed herein. The UE may comprise hardware processing circuitry to determine a coverage enhancement category for the UE based on downlink channel statistics related to reception of downlink signals at the UE from an Evolved Node-B (eNB) and an uplink-downlink imbalance parameter related to uplink reception at the eNB. The hardware processing circuitry may be further to select, for use in a coverage enhancement mode, a PRACH preamble from a set of candidate PRACH preambles based on the determined coverage enhancement category for the UE. In some embodiments, at least some of the candidate PRACH preambles may span a different number of sub-frames.

公开(公告)号：US20200245366A1

公开(公告)日：2020-07-30

申请号：US16724069

申请日：2019-12-20

Applicant: Apple Inc.

Inventor： Debdeep Chatterjee ,  Alexey Khoryaev ,  Gang Xiong ,  Seunghee Han

IPC: H04W74/08 ,  H04W48/04 ,  H04W8/00 ,  H04L29/08

Abstract: Embodiments described herein related generally to techniques for device discovery for device-to-device (D2D) communications. A user equipment (UE) may receive a transmission probability (e.g., from an evolved Node B (eNB)) for transmission of a discovery medium access control (MAC) protocol data unit (PDU) for D2D communications. The UE may determine a pseudo-random number based on an identifier of the UE, information in the discovery MAC PDU, or information associated with a discovery period. The UE may compare the pseudo-random number with the transmission probability to determine whether to transmit the discovery MAC PDU in the discovery period. Another UE may also determine the pseudo-random number to determine whether the UE is to transmit the discovery MAC PDU in the discovery period. Other embodiments may be described and claimed.

公开(公告)号：US10666334B2

公开(公告)日：2020-05-26

申请号：US15746983

申请日：2015-12-11

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Yushu Zhang ,  Yuan Zhu ,  Ralf Bendlin ,  Jong-Kae Fwu ,  Seunghee Han

IPC: H04B7/06 ,  H04L5/00 ,  H04W76/27 ,  H04L1/18 ,  H04L27/26 ,  H04W72/04 ,  H04W88/10

Abstract: In one example, an apparatus of an e-NodeB (eNB) capable to establish a communication connection with a user equipment (UE) in a communication network, the eNB comprising processing circuitry to transmit a downlink (DL) beamforming training reference signal (BF-TRS) to a user equipment (UE) using transmit beamforming weights that are the same. Other examples are also disclosed and claimed.

公开(公告)号：US20240414039A1

公开(公告)日：2024-12-12

申请号：US18804461

申请日：2024-08-14

Applicant: Apple Inc.

Inventor： Seunghee Han ,  Gang Xiong ,  Jong-Kae Fwu ,  Huaning Niu ,  Utsaw Kumar

IPC: H04L27/26 ,  H04J3/06 ,  H04J11/00 ,  H04L5/00 ,  H04W72/23

Abstract: Devices and methods of using xSS are generally disclosed. A UE receives an xPSS with (Nrep) symbols each with a subcarrier spacing of K x a PSS subcarrier spacing and a duration of a PSS symbol/K. PSD subcarriers surround the xPSS and the ZC sequence is punctured to avoid transmission on a DC subcarrier. Guard subcarriers separate the xPSS and PSD when the ZC sequence is less than the occupied BW of the xPSS and at least one element in the ZC sequence is punctured for xPSS symbol generation otherwise. One or more xSSSs and xS-SCHs may follow the xPSS. The xSS may be omnidirectional, each having a same xPSS and different xSSS or xS-SCH or a different xPSS and same xSSS or xS-SCH or beamformed, each having different xPSSs and xSSSs or xS-SCHs or a same xPSS and different xSSS or xS-SCH.