公开(公告)号：US10110294B2

公开(公告)日：2018-10-23

申请号：US14952319

申请日：2015-11-25

Applicant: Apple Inc.

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

IPC: H04B7/08 ,  H04W24/02 ,  H04W52/02

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.

公开(公告)号：US10097337B2

公开(公告)日：2018-10-09

申请号：US15178952

申请日：2016-06-10

Applicant: APPLE INC.

Inventor： Zhu Ji ,  Beibei Wang ,  Johnson O. Sebeni

IPC: H04L5/14 ,  H04W72/04 ,  H04W16/32 ,  H04L5/00 ,  H04L12/26 ,  H04W88/02

Abstract: A method and device are described that may be implemented by a user equipment (UE) that established a first connection to a first network component, the user equipment configured to establish a second connection with a second network component, the user equipment configured for a carrier aggregation functionality, the first network component serving as a primary serving cell (PCell) and the second network component serving as a secondary serving cell (SCell). The method may include determining a cycle comprising a first time when a SCell measurement is performed and a remainder second time, when the cumulative first and second times is less than a threshold cycle time, determining an interruption opportunity based on activity between the UE and the PCell and when the interruption opportunity is determined, deactivating a radio frequency (RF) chain associated with the SCell during the second time.

公开(公告)号：US20180287751A1

公开(公告)日：2018-10-04

申请号：US15941651

申请日：2018-03-30

Applicant: APPLE INC.

Inventor： Junsung LIM ,  Li Su ,  Johnson O. Sebeni ,  Yang Li ,  Young Jae Kim ,  Zhu Ji

IPC: H04L5/00 ,  H04L25/02

CPC classification number: H04L5/006 ,  H04L5/005 ,  H04L5/0094 ,  H04L25/0224 ,  H04L25/0226

Abstract: A method, device and integrated circuit for receiving signals in a narrow bandwidth range from a base station of a network, the narrow bandwidth range being a portion of an overall bandwidth range of the network and the signals comprising one or more of cell-specific reference signal (CRS) tones, determining whether a condition exists based on the one or more CRS tones, when the condition exists, extending the narrow bandwidth range to an extended narrow bandwidth range, the extended narrow bandwidth range including at least one further CRS tone than the narrow bandwidth range and monitoring the extended narrow bandwidth range to receive further signals comprising the at least one further CRS tone.

公开(公告)号：US09967112B2

公开(公告)日：2018-05-08

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: H04L25/00 ,  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.

公开(公告)号：US09816969B2

公开(公告)日：2017-11-14

申请号：US14950608

申请日：2015-11-24

Applicant: Apple Inc.

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

IPC: H04W52/02 ,  H04B7/06 ,  H04W72/12 ,  H04W76/04 ,  G01N29/36 ,  H04W88/02 ,  G01N29/04 ,  G01N29/34 ,  H04W4/02 ,  H04W72/08

CPC classification number: G01N29/36 ,  G01N29/04 ,  G01N29/34 ,  H04B7/0632 ,  H04B7/0639 ,  H04W4/027 ,  H04W52/0216 ,  H04W52/0251 ,  H04W72/082 ,  H04W72/12 ,  H04W76/28 ,  H04W88/02 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/168 ,  Y02D70/24

Abstract: Providing adaptive channel state feedback (CSF) reports in discontinuous reception (DRX) scenarios in a power-efficient manner. The described algorithm may be able to make adaptive decisions to carry over the CSF from previous DRX cycles based on a comparison between an offset at which CSF values are stable and an offset at which a CSF report is to be sent to a base station. If the CSF values are not stable by the time the CSF report is to be sent, a CSF report from a prior DRX cycle may be used. Alternatively, if the CSF value are stable by the time the CSF report is to be sent, a determination may be made to either generate a new CSF report or use a prior CSF report. The latter determination may be made based on various criteria, including channel conditions and DRX cycle length.

公开(公告)号：US09686750B2

公开(公告)日：2017-06-20

申请号：US13623807

申请日：2012-09-20

Applicant: Apple Inc.

Inventor： Zhu Ji ,  Jason Shi ,  Johnson Sebini ,  Navid Damji ,  Li Su

IPC: H04L12/26 ,  H04W52/02 ,  H04W76/04

CPC classification number: H04W52/0283 ,  H04W76/28 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/25

Abstract: Methods and apparatus for adaptively adjusting temporal parameters such as e.g., wake-up times of digital tracking algorithms (such as timing, frequency and power control). In one exemplary embodiment, wake-up times for tracking loops are based on success/error metrics (e.g., Block Error Rate (BLER), Bit Error Rate (BER), Packet Error Rate (PER), Cyclic Redundancy Checks (CRC), etc.) of one or more previous discontinuous reception (DRX) cycles. In a second embodiment, wake-up times for tracking loops are based on residual frequency and timing errors, etc.

公开(公告)号：US09509544B2

公开(公告)日：2016-11-29

申请号：US14996007

申请日：2016-01-14

Applicant: Apple Inc.

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

IPC: H04B1/38 ,  H04L27/26 ,  H04L25/02 ,  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.

公开(公告)号：US09332584B2

公开(公告)日：2016-05-03

申请号：US13654522

申请日：2012-10-18

Applicant: Apple Inc.

Inventor： Luciano M Verger ,  Navid Damji ,  Zhu Ji

IPC: H04W76/04 ,  H04W52/02

CPC classification number: H04W76/28 ,  H04W52/0216 ,  H04W52/0232 ,  H04W52/0251 ,  H04W52/0277 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/24

Abstract: Connected-mode discontinuous reception (C-DRX) cycle scaling by a wireless user equipment (UE) device. The UE may establish a connection with a network via a wireless link, which may operate according to LTE. The UE may communicate with the network via the wireless link using C-DRX over a plurality of C-DRX cycles. Each C-DRX cycle may include a period of time during which the UE operates in a reduced-power state and a scheduled on-duration period of time. An indication may be received to remain in the reduced-power state during the scheduled on-duration period of time of at least one C-DRX cycle. The UE may remain in the reduced-power state during the scheduled on-duration period of time of at least one C-DRX cycle in response to the indication.

Abstract translation: 由无线用户设备（UE）设备连接模式不连续接收（C-DRX）周期缩放。 UE可以经由可以根据LTE操作的无线链路与网络建立连接。 UE可以经由多个C-DRX周期中的C-DRX经由无线链路与网络进行通信。 每个C-DRX周期可以包括UE在降低功率状态和调度的持续时间段期间操作的时间段。 可以在至少一个C-DRX周期的调度的持续时间段期间接收指示以保持在降低功率状态。 响应于该指示，UE可以在至少一个C-DRX周期的调度的持续时间段期间保持在降低功率状态。

公开(公告)号：US09167519B2

公开(公告)日：2015-10-20

申请号：US13754774

申请日：2013-01-30

Applicant: Apple Inc.

Inventor： Navid Damji ,  Zhu Ji ,  Johnson Sebeni ,  Jason Shi ,  Li Su

IPC: H04W4/00 ,  H04W52/02

CPC classification number: H04W52/0225 ,  H04B17/309 ,  H04W36/0083 ,  H04W36/0088 ,  H04W52/0229 ,  H04W52/0245 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/25

Abstract: Methods and apparatus for adaptively adjusting temporal parameters (e.g., neighbor cell search durations). In one embodiment, neighbor cell search durations during discontinuous reception are based on a physical channel metric indicating signal strength and quality (e.g. Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Reference Signal Receive Quality (RSRQ), etc.) of a cell. In a second embodiment, neighbor cell search durations are based on a multitude of physical layer metrics from one or more cells. In one variant, the multitude of physical layer metrics may include signal strength and quality metrics from the serving base station as well as signal strength and quality indicators from neighbor cells derived from the cells respective synchronization sequences.

Abstract translation: 用于自适应地调整时间参数（例如，相邻小区搜索持续时间）的方法和装置。 在一个实施例中，不连续接收期间的相邻小区搜索持续时间是基于指示信号强度和质量的物理信道度量（例如参考信号接收功率（RSRP），接收信号强度指示（RSSI），参考信号接收质量（RSRQ）等） 。）细胞。 在第二实施例中，相邻小区搜索持续时间基于来自一个或多个小区的多个物理层度量。 在一个变型中，多个物理层度量可以包括来自服务基站的信号强度和质量度量以及来自从小区相应的同步序列导出的相邻小区的信号强度和质量指示符。

公开(公告)号：US20150271697A1

公开(公告)日：2015-09-24

申请号：US14733351

申请日：2015-06-08

Applicant: Apple Inc.

Inventor： Zhu Ji ,  Jason Shi ,  Johnson Sebeni ,  Navid Damji ,  Li Su

IPC: H04W24/10 ,  H04W24/08 ,  H04W76/04

CPC classification number: H04W24/10 ,  H04B17/309 ,  H04W24/08 ,  H04W52/02 ,  H04W52/0216 ,  H04W76/28 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/24 ,  Y02D70/25

Abstract: Methods and apparatus for managing radio measurements during discontinuous reception. In one exemplary embodiment, the distribution of Long Term Evolution (LTE) DRX measurements is staggered or distributed across multiple DRX cycles (which may be contiguous or non-contiguous) so as to reduce the transceiver activity and power consumption. The exemplary UE in one implementation only performs a subset of measurements during each DRX cycle. By staggering or distributing cell measurements over multiple DRX cycles, the UE can improve power consumption, while still conforming to measurement requirements.

Abstract translation: 在不连续接收期间管理无线电测量的方法和装置。 在一个示例性实施例中，长期演进（LTE）DRX测量的分布在多个DRX周期（其可以是连续的或不连续的）上交错或分布，以便减少收发器活动和功率消耗。 在一个实现中的示例性UE仅在每个DRX周期期间执行测量的子集。 通过在多个DRX周期上交错或分配小区测量，UE可以提高功耗，同时仍然符合测量要求。