公开(公告)号：US10110398B2

公开(公告)日：2018-10-23

申请号：US15179647

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Sami M. Almalfouh ,  Navid Damji ,  Johnson O. Sebeni ,  Tarik Tabet

IPC: H04W52/02 ,  H04L25/02 ,  H04W24/08 ,  H04B7/08 ,  H04W76/28

Abstract: A wireless device comprises a primary antenna, a primary transceiver, one or more secondary antennas and one or more receive diversity chains. The receive diversity chains, in some embodiments, include transceiver capability. The wireless device measures and collects various statistics. Based on the statistics, the wireless device enables or disables one or more of the receive diversity chains with respect to a cellular radio access technology (RAT). A disabled receive diversity chain, in some instances is then powered down. During an interval when a receive diversity chain is disabled, the control logic periodically or on an event-driven basis enables a given receive diversity chain to probe channel quality indicator (CQI) and channel rank values. In some embodiments, a time interval for collecting a portion of the statistics, is adapted or backed off in anticipation of use of the receive diversity chain, based on traffic circumstances.

公开(公告)号：US20180103425A1

公开(公告)日：2018-04-12

申请号：US15838580

申请日：2017-12-12

Applicant: Apple Inc.

Inventor： Sunny Arora ,  Rati Agrawal ,  Sami M. Almalfouh ,  Xiantao Sun ,  Johnson O. Sebeni ,  Wael S. Barakat ,  Navid Damji ,  Srinivas Pasupuleti ,  Raghuveer Mallikarjunan

IPC: H04W52/02 ,  H04W72/04 ,  H04W88/02

CPC classification number: H04W52/028 ,  H04W52/0251 ,  H04W72/042 ,  H04W88/02 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/20 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/26

Abstract: This disclosure relates to techniques for estimating baseband power consumption and using the baseband power consumption estimation to select baseband operation features. According to some embodiments, one or more baseband power consumption modifiers occurring during an estimation window may be identified. Baseband power consumption of the wireless device during the estimation window may be estimated based on the identified baseband power consumption modifiers occurring during the estimation window. Baseband data throughput of the wireless device during the estimation window may also be estimated. One or more baseband operation characteristics may be selected based at least in part on the estimated baseband power consumption during the estimation window, possibly in conjunction with the estimated baseband data throughput during the estimation window, current wireless medium conditions, and/or other considerations.

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：US09660838B2

公开(公告)日：2017-05-23

申请号：US14290433

申请日：2014-05-29

Applicant: APPLE INC.

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

IPC: H04W4/00 ,  H04L25/02 ,  H04W4/06 ,  H04L27/26 ,  H04L12/18 ,  H04L5/00

CPC classification number: H04L25/0224 ,  H04L5/0048 ,  H04L12/189 ,  H04L25/0212 ,  H04L25/0222 ,  H04L25/0232 ,  H04L27/2601 ,  H04W4/06

Abstract: A method to be performed at a station configured to connect to a Long Term Evolution radio access network (LTE-RAN) to utilize enhanced Multimedia Broadcast Multicast Services using a Multicast-Broadcast Single-Frequency Network (MBSFN). The method including receiving a MBSFN subframe having a MBSFN subframe structure including a plurality of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, a first one of the OFDM symbols having a first reference symbol inserted therein, a second one of the OFDM symbols having a second reference symbol inserted therein, determining a rate of change of channel conditions being experienced by the station and performing a non-destaggered channel estimation when the rate of change of channel conditions is greater than a predetermined threshold, the non-destaggered channel estimation using a first Channel Impulse Response (CIR) at the first OFDM symbol and a second CIR at the second OFDM symbol.

公开(公告)号：US09635616B2

公开(公告)日：2017-04-25

申请号：US15247570

申请日：2016-08-25

Applicant: Apple Inc.

Inventor： Shivesh Makharia ,  Sree Ram Kodali ,  Navid Damji ,  Thanigaivelu Elangovan ,  Luciano Verger ,  Madhusudan Chaudhary ,  Johnson O. Sebeni ,  Srinivasan Vasudevan ,  Samy Khay-Ibbat ,  Longda Xing ,  Jianxiong Shi

IPC: H04W52/02 ,  H04W76/04 ,  H04W72/04

CPC classification number: H04W52/028 ,  H04W52/0216 ,  H04W52/0229 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/12 ,  H04W72/1289 ,  H04W76/28 ,  H04W88/02 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/23 ,  Y02D70/24

Abstract: A connection with a network that includes a base station (BS) may be established by a user device (UE) via a wireless connection, for conducting communications using semi persistent scheduling (SPS) in a connected discontinuous reception (C-DRX) mode. The SPS transmit periodicity may be adjusted with respect to the SPS activation command and the SPS interval UL (for uplink). Data may then be transmitted during the C-DRX On-Duration periods according to the determined SPS transmit periodicity. In some embodiments, the SPS transmit periodicity is adjusted such that following a first C-DRX On-Duration period when an SPS activation command is received, SPS data transmission occurs a specified number of subframes earlier during each subsequent C-DRX On-Duration period than in the first C-DRX On-Duration period. The SPS data transmission in each subsequent C-DRX On-Duration period may take place as soon as the UE device wakes up during the On-Duration period.

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：US09374259B2

公开(公告)日：2016-06-21

申请号：US14497071

申请日：2014-09-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Navid Damji ,  Syed A. Mujtaba ,  Johnson O. Sebeni

IPC: H04L27/06 ,  H04L27/26 ,  H04L5/00 ,  H04W52/02

CPC classification number: H04L27/2649 ,  H04L5/0005 ,  H04L5/0053 ,  H04L27/2647 ,  H04W52/0209 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/25

Abstract: Methods and apparatuses to reduce resource consumption by a mobile wireless device when decoding control channel information, such as a physical downlink control channel (PDCCH), in a subframe received from an LTE wireless network are disclosed. Representative methods include demodulating a first set of one or more PDCCH OFDM symbols contained in the subframe based on a first channel estimate; obtaining a second channel estimate based on a second OFDM symbol before demodulating a second set of one or more PDCCH OFDM symbols contained in the subframe based on both the first channel estimate and the second channel estimate. When the PDCCH indicates no downlink assignments for the subframe, the mobile wireless device enters a reduced power consumption mode after demodulating the PDCCH.

Abstract translation: 公开了在从LTE无线网络接收的子帧中解码诸如物理下行链路控制信道（PDCCH）之类的控制信道信息时，减少移动无线设备的资源消耗的方法和装置。 代表性的方法包括基于第一信道估计来解调包含在子帧中的一个或多个PDCCH OFDM符号的第一集合; 基于第一信道估计和第二信道估计，在解调包含在子帧中的第一组一个或多个PDCCH OFDM符号之前，基于第二OFDM符号获得第二信道估计。 当PDCCH不指示子帧的下行链路分配时，移动无线设备在解调PDCCH之后进入降低的功耗模式。

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。

公开(公告)号：US20160029222A1

公开(公告)日：2016-01-28

申请号：US14795104

申请日：2015-07-09

Applicant: Apple Inc.

Inventor： Li Su ,  Jianxiong Shi ,  Johnson O. Sebeni

IPC: H04W16/14 ,  H04B1/3816 ,  H04W72/10 ,  H04L29/06 ,  H04W4/16

CPC classification number: H04W16/14 ,  H04B1/3816 ,  H04L65/1069 ,  H04W4/16 ,  H04W72/10 ,  H04W76/16 ,  H04W88/06

Abstract: A user equipment (UE) device may perform uplink (UL) data communication using a first radio access technology (RAT) while performing an UL voice call communication using a second RAT. The UL data communication may be supported by a first subscriber identity module (SIM) and the UL packet switched voice call communication may be supported by a second SIM. The UL voice call communication may be a packet switched communication. The communications may be performed by a radio(s) of the UE. The radio(s) may include shared physical layer resources that are shared between the UL data and UL voice communications. The UE may also include a single transmitter that may be shared between the UL data and UL packet voice communications and the UL data communication may use a first portion of the single transmitter's TTI and the UL voice communication may use a second portion of the single transmitter's TTI.

Abstract translation: 用户设备（UE）设备可以使用第一无线电接入技术（RAT）执行上行链路（UL）数据通信，同时使用第二RAT执行UL语音呼叫通信。 UL数据通信可以由第一用户身份模块（SIM）支持，并且UL分组交换语音呼叫通信可以由第二SIM来支持。 UL语音呼叫通信可以是分组交换通信。 通信可以由UE的无线电来执行。 无线电装置可以包括在UL数据和UL语音通信之间共享的共享物理层资源。 UE还可以包括可以在UL数据和UL分组语音通信之间共享的单个发射机，并且UL数据通信可以使用单个发射机的TTI的第一部分，并且UL语音通信可以使用单个发射机的第二部分 TTI。

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。