中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

219 records (took 0.026 seconds)

    Robust scalable and adaptive frequency estimation and frequency tracking for wireless systems
    161.
    发明授权
    Robust scalable and adaptive frequency estimation and frequency tracking for wireless systems 有权
    无线系统的鲁棒可扩展和自适应频率估计和频率跟踪

    公开(公告)号：US09264278B2

    公开(公告)日：2016-02-16

    申请号：US14058155

    申请日：2013-10-18

    Applicant: Apple Inc.

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

    IPC: H04L27/06 ,  H04L27/26 ,  H04L27/00

    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。

    Adaptive use of receiver diversity
    162.
    发明授权
    Adaptive use of receiver diversity 有权
    适应性使用接收机分集

    公开(公告)号：US09226175B2

    公开(公告)日：2015-12-29

    申请号：US13900197

    申请日：2013-05-22

    Applicant: Apple Inc.

    Inventor： Srinivasan Nimmala ,  Navid Damji ,  Tarik Tabet ,  Li Su ,  Longda Xing ,  Zhu Ji

    IPC: H04W24/04 ,  H04B7/08 ,  H04W24/02

    CPC classification number: H04B7/0877 ,  H04B7/0814 ,  H04B7/0822 ,  H04B7/0871 ,  H04W24/02 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/23 ,  Y02D70/444

    Abstract: A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.

    Abstract translation: 提供了一种用于自适应地禁用接收机分集的方法。 该方法可以包括确定活动数据业务模式的无线通信设备; 至少部分地基于为活动数据业务模式支持阈值服务质量所需的阈值信道质量来定义阈值信道质量度量; 将测量的信道质量与阈值信道质量度量进行比较; 并且在测量的信道质量度量满足阈值信道质量度量的情况下禁用接收机分集。

    Adaptive Generation of Channel State Feedback (CSF) Based on Base Station CSF Scheduling
    163.
    发明申请
    Adaptive Generation of Channel State Feedback (CSF) Based on Base Station CSF Scheduling 审中-公开
    基于基站CSF调度的信道状态反馈（CSF）的自适应生成

    公开(公告)号：US20150305013A1

    公开(公告)日：2015-10-22

    申请号：US14753388

    申请日：2015-06-29

    Applicant: Apple Inc.

    Inventor： Zhu Ji ,  Navid Damji ,  Johnson O. Sebeni

    IPC: H04W72/04 ,  H04W72/12 ,  H04B7/04 ,  H04L5/00

    CPC classification number: H04W72/048 ,  H04B7/0413 ,  H04L5/0046 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0078 ,  H04L5/0091 ,  H04W72/1289

    Abstract: Adaptive generation of channel state feedback (CSF) based on base station CSF scheduling. CSF report scheduling information may be received. CSF metrics may be generated based at least in part on the CSF report scheduling information. A CSF report including the CSF metrics may be transmitted to the base station. Periodicity of CSF report scheduling or other CSF report scheduling factors may be taken into consideration in generation of the CSF metrics.

    Abstract translation: 基于基站CSF调度的信道状态反馈（CSF）的自适应生成。 可以接收CSF报告调度信息。 可以至少部分地基于CSF报告调度信息来生成CSF度量。 包括CSF度量的CSF报告可以被发送到基站。 可以在生成CSF度量时考虑CSF报告调度或其他CSF报告调度因子的周期性。

    Adaptive Link Adaptation for Wireless Communications
    165.
    发明申请
    Adaptive Link Adaptation for Wireless Communications 有权
    无线通信的自适应链路适配

    公开(公告)号：US20140307645A1

    公开(公告)日：2014-10-16

    申请号：US14157509

    申请日：2014-01-16

    Applicant: Apple Inc.

    Inventor： Zhu Ji ,  Johnson O. Sebeni ,  Navid Damji

    IPC: H04L5/00

    CPC classification number: H04L5/0053 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/203 ,  H04L5/0055

    Abstract: A wireless communication system is presented in which subframe-specific link adaptation is performed. A mobile device can transmit a signal that informs a base station whether a particular subframe was received successfully. Additionally the mobile device can calculate channel state information (CSI) for a subframe and report the CSI to a base station. The reported CSI may or may not include an indicator for informing the base station about from which type of subframe the CSI was derived. The base station can receive the signal, the CSI and/or the indicator. Based on what information the base station has received, it performs subframe-specific BLER filtering and subframe-specific link adaptation scheduling and MCS adjustments.

    Abstract translation: 提出了一种无线通信系统，其中执行子帧专用链路自适应。 移动设备可以发送通知基站特定子帧是否被成功接收的信号。 此外，移动设备可以计算子帧的信道状态信息（CSI）并将CSI报告给基站。 所报告的CSI可以包括也可以不包括用于通知基站从哪个类型的子帧导出CSI的指示符。 基站可以接收信号，CSI和/或指示符。 基于基站接收到什么信息，它执行子帧特定的BLER过滤和子帧特定的链路自适应调度和MCS调整。

    ADAPTIVE USE OF RECEIVER DIVERSITY
    166.
    发明申请
    ADAPTIVE USE OF RECEIVER DIVERSITY 有权
    自适应使用接收者多样性

    公开(公告)号：US20140269373A1

    公开(公告)日：2014-09-18

    申请号：US13900197

    申请日：2013-05-22

    Applicant: Apple Inc.

    Inventor： Srinivasan Nimmala ,  Navid Damji ,  Tarik Tabet ,  Li Su ,  Longda Xing ,  Zhu Ji

    IPC: H04B7/08 ,  H04W24/02

    CPC classification number: H04B7/0877 ,  H04B7/0814 ,  H04B7/0822 ,  H04B7/0871 ,  H04W24/02 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/23 ,  Y02D70/444

    Abstract: A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.

    Abstract translation: 提供了一种用于自适应地禁用接收机分集的方法。 该方法可以包括确定活动数据业务模式的无线通信设备; 至少部分地基于为活动数据业务模式支持阈值服务质量所需的阈值信道质量来定义阈值信道质量度量; 将测量的信道质量与阈值信道质量度量进行比较; 并且在测量的信道质量度量满足阈值信道质量度量的情况下禁用接收机分集。

    ACCESSIBILITY IN DYNAMIC CELLULAR NETWORKS
    167.
    发明申请
    ACCESSIBILITY IN DYNAMIC CELLULAR NETWORKS 审中-公开
    动态蜂窝网络的可及性

    公开(公告)号：US20140099941A1

    公开(公告)日：2014-04-10

    申请号：US13854810

    申请日：2013-04-01

    Applicant: APPLE INC.

    Inventor： Zhu Ji ,  Johnson O. Sebeni

    IPC: H04W16/14

    CPC classification number: H04W16/14 ,  H04W24/00 ,  H04W48/16 ,  H04W48/18

    Abstract: In order to facilitate communication in a dynamic cellular network, an accessibility issue in the dynamic cellular network may be detected. For example, if an electronic device is near the boundary between two adjacent cells in the dynamic cellular-telephone network, the signal power of signals from the adjacent cell may be higher than that of signals from the current servicing cell, which may offer an opportunity to improve communication performance. Thus, the accessibility issue may be detected if the difference is larger than a threshold value (such as 2-4 dB). In response to detecting the accessibility issue, a remedial action may be performed, such as repeating at least a portion of an acquisition process. In this way, the communication technique may improve the communication performance of the electronic device in the dynamic cellular network, thereby improving the user experience and customer satisfaction.

    Abstract translation: 为了促进动态蜂窝网络中的通信，可以检测动态蜂窝网络中的可及性问题。 例如，如果电子设备靠近动态蜂窝电话网络中的两个相邻小区之间的边界，则来自相邻小区的信号的信号功率可能高于来自当前服务小区的信号的信号功率，这可以提供机会 以提高通信性能。 因此，如果差值大于阈值（例如2-4dB），则可以检测可访问性问题。 响应于检测可访问性问题，可以执行补救动作，例如重复获取过程的至少一部分。 以这种方式，通信技术可以改善动态蜂窝网络中电子设备的通信性能，从而提高用户体验和客户满意度。

    APPARATUS AND METHODS FOR ADAPTIVELY RESUMING RADIO CHANNEL ESTIMATION
    168.
    发明申请
    APPARATUS AND METHODS FOR ADAPTIVELY RESUMING RADIO CHANNEL ESTIMATION 有权
    用于适应性无线电信道估计的装置和方法

    公开(公告)号：US20130322586A1

    公开(公告)日：2013-12-05

    申请号：US13887207

    申请日：2013-05-03

    Applicant: Apple Inc.

    Inventor： Tarik Tabet ,  Navid Damji ,  Kee-Bong Song ,  Syed Aon Mujtaba ,  Johnson Sebeni ,  Zhu Ji

    IPC: H04L25/02

    CPC classification number: H04L25/0206 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/0256

    Abstract: Methods and apparatus for resuming radio channel measurements and estimations after an interruption in reception. In one exemplary embodiment of the present disclosure, an adaptive solution is provided for channel estimation based at least in part on the reception interruption duration. In one variant, an LTE UE determines a windowing length and/or “shape” for a time domain channel estimation algorithm based on at least the interruption duration. In an alternate variant, an LTE UE determines the interpolation coefficients for a filter based on the interruption duration.

    Abstract translation: 在接收中断后恢复无线电信道测量和估计的方法和装置。 在本公开的一个示例性实施例中，至少部分地基于接收中断持续时间来提供用于信道估计的自适应解决方案。 在一个变型中，LTE UE至少基于中断持续时间来确定时域信道估计算法的加窗长度和/或“形状”。 在替代变型中，LTE UE基于中断持续时间确定滤波器的内插系数。

    Outer Loop Link Adaptation for Device Resumption
    169.
    发明申请
    Outer Loop Link Adaptation for Device Resumption 审中-公开
    用于设备恢复的外环链路适配

    公开(公告)号：US20130310092A1

    公开(公告)日：2013-11-21

    申请号：US13663653

    申请日：2012-10-30

    Applicant: APPLE INC.

    Inventor： Tarik Tabet ,  Paul V. Flynn ,  Syed A. Mujtaba ,  Navid Damji ,  Zhu Ji ,  Sreevalsan Vallath

    IPC: H04B15/00 ,  H04W24/02

    CPC classification number: H04L1/0003 ,  Y02D50/10

    Abstract: Outer loop link adaptation for device resumption. A user equipment (UE) and base station (BS) may be in communication in a first network (e.g., an LTE network). Communication between the UE and the BS may be interrupted, e.g., due to a long fading environment, the UE tuning away to a second network (e.g., a CDMA network). Accordingly, the measured error rate may increase dramatically. After resumption from the interruption, a negative offset may be applied to a reported SINR value from the UE due to the previous increase in error rate. Upon improvement in the error rate, a larger, positive offset adjustment may be added to the negative offset, allowing the estimated SINR to return to reported SINR more quickly. Additionally, the error rate estimation may be adjusted to converge to a more recently measured more quickly by decreasing a feedback filter coefficient.

    Abstract translation: 用于设备恢复的外环链路自适应。 用户设备（UE）和基站（BS）可以在第一网络（例如，LTE网络）中进行通信。 UE和BS之间的通信可能被中断，例如由于漫长的衰落环境，UE调谐到第二网络（例如，CDMA网络）。 因此，测量的误码率可能会急剧增加。 在从中断恢复之后，由于错误率的先前增加，可能对来自UE的所报告的SINR值应用负偏移。 在改进误差率时，可以将更大的正偏移调整添加到负偏移，从而允许估计的SINR更快地返回到所报告的SINR。 此外，可以通过减小反馈滤波器系数来调整误差率估计以收敛到更近的测量更快。

Patent Agency Ranking