公开(公告)号：US20140112378A1

公开(公告)日：2014-04-24

申请号：US14058155

申请日：2013-10-18

Applicant: Apple Inc.

Inventor： Zhu Ji ,  Johnson O. Sebeni ,  Yu-Lin Wang

IPC: H04L27/26

CPC classification number: H04L27/2659 ,  H04L25/0212 ,  H04L27/266 ,  H04L27/2682 ,  H04L27/2688 ,  H04L2027/0053

Abstract: Methods and apparatuses to determine a frequency adjustment in a mobile wireless device are disclosed. A method includes determining a coarse frequency error estimate and multiple fine frequency error estimates; selecting at least one candidate fine frequency error estimate having a frequency value closest to a corresponding frequency value for the coarse frequency error estimate; and determining a frequency adjustment based on a combination of the coarse frequency error estimate and the selected at least one candidate fine frequency error estimate. In an embodiment, the method further includes calculating a confidence metric for the coarse frequency error estimate; when the confidence metric exceeds a threshold value, determining the frequency adjustment based on the candidate fine frequency error estimate; otherwise, determining the frequency adjustment based on a fine frequency error estimate in the plurality of fine frequency error estimates closest to a most recent previous fine frequency error estimate.

Abstract translation: 公开了确定移动无线设备中的频率调整的方法和装置。 一种方法包括：确定粗略频率误差估计和多个精细频率误差估计; 选择具有最接近所述粗略频率误差估计的对应频率值的频率值的至少一个候选精细频率误差估计; 以及基于粗略频率误差估计和所选择的至少一个候选精细频率误差估计的组合来确定频率调整。 在一个实施例中，该方法还包括计算粗略频率误差估计的置信度量; 当所述置信量度超过阈值时，基于所述候选精细频率误差估计来确定频率调整; 否则，基于与最近的先前精细频率误差估计最接近的多个精细频率误差估计中的精细频率误差估计来确定频率调整。

公开(公告)号：US10560897B2

公开(公告)日：2020-02-11

申请号：US15992826

申请日：2018-05-30

Applicant: APPLE INC.

Inventor： Jia Tang ,  Zhu Ji ,  Yu-Lin Wang ,  Wei Zhang

IPC: H04W52/02 ,  H04W72/12

Abstract: A method and user equipment for transmission slot blank. The method includes, at the user equipment (“UE”), establishing a voice call, determining whether the voice call currently comprises a silence period, blanking at least two slots of a control frame according to a predetermined pattern, wherein the predetermined pattern includes at least one slot that is not blanked between the at least two slots that are blanked, and transmitting the control frame.

公开(公告)号：US20190181942A1

公开(公告)日：2019-06-13

申请号：US15994708

申请日：2018-05-31

Applicant: Apple Inc.

Inventor： Jia Tang ,  Zhu Ji ,  Yang Li ,  Johnson O. Sebeni ,  Yu-Lin Wang ,  Sulabh Khandelwal ,  Beibei Wang ,  Zheng Zhang

IPC: H04B7/08 ,  H04W76/28 ,  H04L5/00 ,  H04W52/24

CPC classification number: H04B7/0825 ,  H04B17/318 ,  H04B17/382 ,  H04L5/0057 ,  H04W52/24 ,  H04W76/28

Abstract: Adaptive multiplexing and transmit/receive diversity. A wireless device may include multiple antennas. A first set of antennas may be used for communication. One or more trigger conditions may be determined, and additional antennas may be activated for measurement. Based on the measurement(s), a second set of antennas may be selected and used for communication.

公开(公告)号：US20210289583A1

公开(公告)日：2021-09-16

申请号：US17195270

申请日：2021-03-08

Applicant: Apple Inc.

Inventor： Wei Zhang ,  Pengkai Zhao ,  Shiva Krishna Narra ,  Sriram Subramanian ,  Madhukar K. Shanbhag ,  Sanjeevi Balasubramanian ,  Junsung Lim ,  Jia Tang ,  Galib A. Mohiuddin ,  Yu-Lin Wang ,  Zhu Ji ,  Johnson O. Sebeni

IPC: H04W76/28 ,  H04W52/02 ,  H04W24/10

Abstract: This disclosure relates to techniques for a wireless device to perform millimeter wavelength communication with increased reliability and power efficiency using sensor inputs. The sensor inputs may include motion, rotation, or temperature measurements, among various possibilities. The sensor inputs may be used when performing beamforming tracking, antenna configuration, transmit and receive chain measurements and selection, and/or in any of various other possible operations.

公开(公告)号：US20210211972A1

公开(公告)日：2021-07-08

申请号：US17084387

申请日：2020-10-29

Applicant: Apple Inc.

Inventor： Wei Zhang ,  Alosious Pradeep Prabhakar ,  Pengkai Zhao ,  Vijay Venkataraman ,  Junsung Lim ,  Zhu Ji ,  Johnson O. Sebeni ,  Yu-Lin Wang ,  Galib A. Mohiuddin ,  Sriram Subramanian ,  Shiva Krishna Narra ,  Madhukar K. Shanbhag ,  Sanjeevi Balasubramanian ,  Daniel A. West ,  Rohit R. Matolia

IPC: H04W48/16 ,  H04W24/10 ,  H04W52/02 ,  H04W4/02

Abstract: A user equipment (UE) supports communication over a first (lower) frequency range and a second (higher) frequency range. The UE determines an extent of preference of the second frequency range over the first frequency range, e.g., based on one or more of the following: sensor measurements; physical channel measurements; battery conditions; weather conditions; voice call activity; indoor/outdoor/in-car status; learned relationships between previous location-time conditions and performance on the second frequency range; etc. The UE device may control search activity and/or measurement activity on the second frequency range based on the preference extent, e.g., by controlling rates of repetition of search and/or measurement on the second frequency range, or by adding a measurement bias to a measurement reporting threshold, or by adding a delay to a measurement reporting time for a measurement, or by disabling search and measurement on the second frequency range.

公开(公告)号：US10432292B2

公开(公告)日：2019-10-01

申请号：US15994708

申请日：2018-05-31

Applicant: Apple Inc.

Inventor： Jia Tang ,  Zhu Ji ,  Yang Li ,  Johnson O. Sebeni ,  Yu-Lin Wang ,  Sulabh Khandelwal ,  Beibei Wang ,  Zheng Zhang

IPC: H04B7/08 ,  H04W52/24 ,  H04L5/00 ,  H04W76/28

Abstract: Adaptive multiplexing and transmit/receive diversity. A wireless device may include multiple antennas. A first set of antennas may be used for communication. One or more trigger conditions may be determined, and additional antennas may be activated for measurement. Based on the measurement(s), a second set of antennas may be selected and used for communication.

公开(公告)号：US10194403B2

公开(公告)日：2019-01-29

申请号：US15130648

申请日：2016-04-15

Applicant: APPLE INC.

Inventor： Johnson Sebeni ,  Yu-Lin Wang ,  Jianxiong Shi

IPC: H04W52/34 ,  H04L1/00 ,  H04W52/32 ,  H04W24/02 ,  H04W24/08 ,  H04W52/24

Abstract: Methods and apparatus for correcting quantization errors in signal reception based on estimated network loading including solutions for preserving cellular network performance in low noise, high interference environments. In one embodiment, a data channel is amplified with respect to other signals based on network load during periods of relatively low network utilization. Dynamic modification of the data channel's power level is configured to overcome quantization errors, rather than the true noise floor (which is insignificant in low noise environments). Such solutions provide both the fidelity necessary to enable high degrees of unwanted signaling rejection, while still preserving data channel quality.

公开(公告)号：US09819457B2

公开(公告)日：2017-11-14

申请号：US14846002

申请日：2015-09-04

Applicant: APPLE INC.

Inventor： Zu Ji ,  Johnson O. Sebeni ,  Yu-Lin Wang

IPC: H04Q7/00 ,  H04L5/00 ,  H04B17/309

CPC classification number: H04L5/0007 ,  H04B17/309 ,  H04L5/0048 ,  H04L5/0053

Abstract: A user equipment and method performs an adaptive channel estimation. The method performed at a user equipment includes receiving physical downlink control channel (PDCCH) information for a subframe from a network, the subframe including reference symbols at predetermined times therein. If the PDCCH information does not include a downlink grant for the user equipment, a measured value of a network metric experienced by the user equipment is determined and compared to a threshold criteria. A first set of the reference symbols is used for channel estimation when the threshold value is satisfied and a second set of the reference symbols is used for channel estimation when the threshold is not satisfied, the first set of references symbols is a subset of the second set of the reference symbols. In another embodiment, a previously determined channel estimation at a previous subframe is used for the subframe when the threshold is satisfied.

公开(公告)号：US09596633B2

公开(公告)日：2017-03-14

申请号：US14135671

申请日：2013-12-20

Applicant: Apple Inc.

Inventor： Zhu Ji ,  Johnson O. Sebeni ,  Xiantao Sun ,  Yu-Lin Wang

IPC: H04W36/00 ,  H04W76/04 ,  H04W68/02

CPC classification number: H04W36/0088 ,  H04W68/02 ,  H04W76/28

Abstract: Adaptive neighboring cell measurement scaling by a wireless user equipment (UE) device. The UE may operate alternately in active and inactive states in a periodic manner according to DRX cycle timing for each of a plurality of DRX cycles. Paging messages may be checked for while in the active state during each DRX cycle. If a paging message is received, it may be decoded using a joint detection technique. The UE may adaptively determine whether or not to perform neighboring cell measurements during at least a subset of the DRX cycles, and perform neighboring cell measurements according to the adaptive determination. The adaptive determination may be based on one or more of joint detection of paging messages, one or more previous cell measurements, or an amount of motion of the UE.

Abstract translation: 由无线用户设备（UE）设备进行的适应性相邻小区测量缩放。 UE可以根据针对多个DRX周期中的每一个的DRX周期定时以周期方式交替地在活动状态和非活动状态中进行操作。 可以在每个DRX周期期间在处于活动状态期间检查寻呼消息。 如果接收到寻呼消息，则可以使用联合检测技术对其进行解码。 UE可以自适应地确定在DRX周期的至少一个子集期间是否执行相邻小区测量，并且根据自适应确定执行相邻小区测量。 自适应确定可以基于寻呼消息的联合检测，一个或多个先前小区测量或UE的运动量中的一个或多个。

公开(公告)号：US20160234791A1

公开(公告)日：2016-08-11

申请号：US15130648

申请日：2016-04-15

Applicant: APPLE INC.

Inventor： Johnson SEBENI ,  Yu-Lin Wang ,  Jianxiong Shi

IPC: H04W52/34 ,  H04W52/32 ,  H04W24/08

CPC classification number: H04W24/02 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0015 ,  H04W24/08 ,  H04W52/241 ,  H04W52/245 ,  H04W52/325 ,  H04W52/343

Abstract: Methods and apparatus for correcting quantization errors in signal reception based on estimated network loading including solutions for preserving cellular network performance in low noise, high interference environments. In one embodiment, a data channel is amplified with respect to other signals based on network load during periods of relatively low network utilization. Dynamic modification of the data channel's power level is configured to overcome quantization errors, rather than the true noise floor (which is insignificant in low noise environments). Such solutions provide both the fidelity necessary to enable high degrees of unwanted signaling rejection, while still preserving data channel quality.

Abstract translation: 基于估计的网络负载来校正信号接收中的量化误差的方法和装置，包括用于在低噪声，高干扰环境中保持蜂窝网络性能的解决方案。 在一个实施例中，在相对低的网络利用期间，基于网络负载，数据信道相对于其他信号被放大。 配置数据通道功率电平的动态修改，以克服量化误差，而不是真实的噪声基底（这在低噪声环境中是无关紧要的）。 这样的解决方案提供了在保持数据信道质量的同时能够实现高度不需要的信令拒绝所必需的保真度。