公开(公告)号：US12273169B2

公开(公告)日：2025-04-08

申请号：US17859363

申请日：2022-07-07

Applicant: Apple Inc.

Inventor： Huaning Niu ,  Hyejung Jung ,  Gang Xiong ,  Yushu Zhang ,  Hooman Shirani-Mehr ,  Yuan Zhu ,  Jong-Kae Fwu

IPC: H04B7/06 ,  H04J11/00 ,  H04L5/00 ,  H04L27/26 ,  H04W36/00 ,  H04W72/23 ,  H04W88/16

Abstract: Disclosed herein are apparatuses, systems, and methods using or implementing dynamic beamforming in control channels, by transmitting downlink control channels to user equipment (UEs) in a number of orthogonal frequency division multiplexing (OFDM) symbols of a downlink subframe. A first OFDM symbol of the number of OFDM symbols can be transmitted using first beamforming parameters in a first direction, and a second OFDM symbol of the number of OFDM symbols can be transmitted using second beamforming parameters different from the first beamforming parameters and in a second direction different from the first direction. The number of OFDM symbols used, as well as other parameters, can be dynamically adjusted in subsequent subframes. Other embodiments are described.

公开(公告)号：US11831479B2

公开(公告)日：2023-11-28

申请号：US17096077

申请日：2020-11-12

Applicant: Apple Inc.

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

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

CPC classification number: H04L27/26025 ,  H04J11/0076 ,  H04L5/0094 ,  H04L27/2613 ,  H04L27/2692 ,  H04J3/0638 ,  H04L5/0048 ,  H04L5/0096 ,  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×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.

公开(公告)号：US11664958B2

公开(公告)日：2023-05-30

申请号：US17531884

申请日：2021-11-22

Applicant: Apple Inc.

Inventor： Peng Lu ,  Qiaoyang Ye ,  Gang Xiong ,  Glenn J. Bradford ,  Joonyoung Cho ,  Jong-Kae Fwu ,  Bishwarup Mondal

IPC: H04L5/00 ,  H04J13/00 ,  H04L7/00

CPC classification number: H04L5/0098 ,  H04J13/0062 ,  H04L5/001 ,  H04L5/0048 ,  H04L7/007

Abstract: Systems, methods, and baseband processors are provided to generate or process symbols in a synchronization subframe. In one example, a method includes selecting non-consecutive orthogonal frequency division multiplexing (OFDM) symbols in a synchronization subframe. A transmitter is instructed to transmit demodulation reference symbols (DM-RS) on identical first sets of subcarriers in respective OFDM symbols of the selected non-consecutive OFDM symbols for a Physical Broadcast Channel (PBCH) using a same transmit beam, wherein a gap between two subcarriers in a respective set of the identical first sets of subcarriers is three subcarriers. The transmitter is instructed to transmit the PBCH on identical second sets of subcarriers in respective OFDM symbols in the selected non-consecutive OFDM symbols.

公开(公告)号：US11638170B2

公开(公告)日：2023-04-25

申请号：US16809990

申请日：2020-03-05

Applicant: APPLE INC.

Inventor： Youn Hyoung Heo ,  Yujian Zhang ,  Jong-Kae Fwu

IPC: H04W28/02 ,  H04W4/70 ,  H04W76/30 ,  H04W76/28 ,  H04W36/00 ,  H04L65/75 ,  H04W72/20 ,  H04W72/21 ,  H04W72/23 ,  H04W72/52 ,  H04W72/541 ,  H04W40/00 ,  H04W40/24 ,  H04W52/02 ,  H04W52/04 ,  H04B17/318 ,  H04W76/12 ,  H04W76/15 ,  H04W76/23 ,  H04W76/27 ,  H04J3/16 ,  H04J11/00 ,  H04L1/1812 ,  H04L1/1829 ,  H04L1/1867 ,  H04L5/00 ,  H04L5/14 ,  H04L41/50 ,  H04L65/60 ,  H04L67/10 ,  H04W8/08 ,  H04W24/02 ,  H04W24/08 ,  H04W24/10 ,  H04W28/16 ,  H04W36/22 ,  H04W48/16 ,  H04W48/20 ,  H04W52/14 ,  H04W72/02 ,  H04W72/044 ,  H04W72/0453 ,  H04W74/00 ,  H04W88/02 ,  H04W76/16 ,  H04L41/069 ,  H04L43/16 ,  H04W36/14 ,  H04W88/06 ,  H04W72/30 ,  H04W80/10 ,  H04W84/12 ,  H04W88/08 ,  H04W88/18 ,  H04W84/04 ,  H04W88/12 ,  H04W88/14 ,  H04W88/16

Abstract: Embodiments of a system and method for providing DRX enhancements in LTE systems are generally described herein. In some embodiments, a system control module is provided for controlling communications via a communications interface. A processor is coupled to the system control module and is arranged to implement an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on the physical downlink control channel for control signals, the processor further monitoring subframes after the active time.

公开(公告)号：US20230018315A1

公开(公告)日：2023-01-19

申请号：US17935097

申请日：2022-09-24

Applicant: APPLE INC.

Inventor： Youn Hyoung Heo ,  Yujian Zhang ,  Jong-Kae Fwu

IPC: H04W28/02 ,  H04W4/70 ,  H04W76/30 ,  H04W76/28 ,  H04W36/00 ,  H04L65/75 ,  H04W72/04 ,  H04W40/00 ,  H04W40/24 ,  H04W52/02 ,  H04W52/04 ,  H04B17/318 ,  H04W76/12 ,  H04W76/15 ,  H04W76/23 ,  H04W76/27 ,  H04J3/16 ,  H04J11/00 ,  H04L1/18 ,  H04L5/00 ,  H04L5/14 ,  H04L41/50 ,  H04L65/60 ,  H04L67/10 ,  H04W8/08 ,  H04W24/02 ,  H04W24/08 ,  H04W24/10 ,  H04W28/16 ,  H04W36/22 ,  H04W48/16 ,  H04W48/20 ,  H04W52/14 ,  H04W72/02 ,  H04W72/08 ,  H04W72/12 ,  H04W74/00 ,  H04W88/02 ,  H04W76/16 ,  H04L41/069 ,  H04L43/16 ,  H04W36/14

Abstract: Embodiments of a system and method for providing DRX enhancements in LTE systems are generally described herein. In some embodiments, a system control module is provided for controlling communications via a communications interface. A processor is coupled to the system control module and is arranged to implement an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on the physical downlink control channel for control signals, the processor further monitoring subframes after the active time.

公开(公告)号：US11336348B2

公开(公告)日：2022-05-17

申请号：US17007688

申请日：2020-08-31

Applicant: Apple Inc.

Inventor： Wenting Chang ,  Yushu Zhang ,  Yuan Zhu ,  Huaning Niu ,  Jong-Kae Fwu

IPC: H04B7/06 ,  H04L5/00

Abstract: User Equipment (UE) and base station (eNB) apparatus and methodology for adjusting receive beamforming. A beam refinement reference signal (BRRS) is transmitted with the same transmit beam direction on which data is to be transmitted. While receiving the BRRS, the receiver varies its receive beam direction and measures a signal characteristic of reception of the BRRS to determine a refined receive beam direction. The refined receive beam direction is used to receive the data.

公开(公告)号：US11291079B2

公开(公告)日：2022-03-29

申请号：US16832938

申请日：2020-03-27

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Glenn J. Bradford ,  Yushu Zhang ,  Jong-Kae Fwu ,  Yuan Zhu

IPC: H04L5/00 ,  H04W88/06 ,  H04L1/18 ,  H04W76/27 ,  H04B7/06 ,  H04L5/14 ,  H04W72/04 ,  H04B7/0413

Abstract: Devices for and methods of providing low latency 5G FDD communications are generally described. A HARQ ACK/NACK for an xPDSCH is transmitted in the xPUCCH of the same or next subframe as the xPDSCH and xPDCCH. An xPUSCH is generated in the same subframe in response to an xPDCCH and HARQ ACK/NACK response is carried by another xPDCCH or xPHICH in the same or next subframe. The xPDCCH and the xPUCCH are at opposite ends of the same subframe, DL and UL subframe are delayed relative to each other, or at least one of the DL and UL subframe has an additional blank portion, portion with data associated with another UE or portion that contains a reference signal, broadcast signal or control information.

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：US11039434B2

公开(公告)日：2021-06-15

申请号：US14778528

申请日：2014-03-27

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Huaning Niu ,  Debdeep Chatterjee ,  Jong-Kae Fwu

IPC: H04W72/04 ,  H04W76/10 ,  H04W76/19 ,  H04W76/30 ,  H04W24/10 ,  H04B7/0452 ,  H04B7/06 ,  H04W56/00 ,  H04W72/02 ,  H04L25/02 ,  H04L25/03 ,  H04W88/02 ,  H04W16/14 ,  H04W8/00 ,  H04W48/16 ,  H04L12/18 ,  H04W74/00 ,  H04W74/08 ,  H04W36/02 ,  H04W68/04 ,  H04B7/024 ,  H04J11/00 ,  H04L5/14 ,  H04W48/12 ,  H04W84/18 ,  H04W88/06 ,  H04W84/04

Abstract: Embodiments of a user equipment (UE) and method for resource allocation and device-to-device (D2D) discovery hopping are generally described herein. In some embodiments, the UE may receive signaling from an enhanced node B (eNB) indicating discovery resources to transmit discovery signals on within an LTE operation zone. The discovery resources may include a discovery zone which may comprise a plurality of physical resource blocks (PRBs) and a plurality of subframes. The UE may transmit a discovery signal for receipt by one or more other UEs for D2D discovery within some of the PRBs of the discovery zone. The PRBs for the transmission of the discovery signal may be determined in accordance with a hopping mode to provide increased frequency diversity within a bandwidth of the discovery zone. The hopping mode may comprise intra-subframe hopping, inter-subframe hopping or joint intra/inter-subframe hopping.

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.