公开(公告)号：US20140242984A1

公开(公告)日：2014-08-28

申请号：US14231479

申请日：2014-03-31

Applicant: APPLE INC.

Inventor： Syed A. Mujtaba ,  Wen Zhao ,  Xiaowen Wang ,  Vinay Majjigi

IPC: H04W76/04 ,  H04W48/18

CPC classification number: H04W76/27 ,  H04W24/00 ,  H04W48/18 ,  H04W68/00 ,  H04W88/06

Abstract: Electronic devices may be provided that contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to antennas. An electronic device may include a baseband processor and other storage and processing circuitry that implements protocol stacks for handling multiple radio access technologies. The storage and processing circuitry may use the transceiver circuitry to convey data using a first radio access technology while periodically interrupting the conveying of the data to monitor a paging channel using a second radio access technology. In performing the paging channel monitoring operations, the storage and processing circuitry may enforce a time limit that ensures that operations using the first radio access technology are not disrupted more than desired.

Abstract translation: 可以提供包含无线通信电路的电子设备。 无线通信电路可以包括耦合到天线的射频收发器电路。 电子设备可以包括基带处理器和实现用于处理多个无线电接入技术的协议栈的其他存储和处理电路。 存储和处理电路可以使用收发器电路使用第一无线电接入技术传送数据，同时周期性地中断数据的传送以使用第二无线电接入技术监视寻呼信道。 在执行寻呼信道监视操作时，存储和处理电路可以强制执行时间限制，确保使用第一无线电接入技术的操作不会超出所期望的中断。

公开(公告)号：US20130288624A1

公开(公告)日：2013-10-31

申请号：US13779661

申请日：2013-02-27

Applicant: APPLE INC.

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang ,  Tarik Tabet ,  Kee-Bong Song ,  Youngjae Kim ,  Yuchul Kim

IPC: H04B7/08

CPC classification number: H04B7/0814 ,  H04B7/0817 ,  H04B7/0871 ,  H04W52/0209 ,  Y02D70/1262 ,  Y02D70/444

Abstract: Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.

Abstract translation: 在例如移动设备中实现“智能”接收分集管理的装置和方法。 在一个实现中，移动设备包括启用LTE的UE，并且智能分集管理包括在满足多个标准时选择性地禁用该设备中的接收分集（RxD），包括（i）容量标准，和（ii）连接 标准。 在一个变型中，容量标准包括确保与单个Rx（接收）链相关联的可实现的数据速率与RxD的数据速率相当。

公开(公告)号：US12082027B2

公开(公告)日：2024-09-03

申请号：US17437797

申请日：2021-06-07

Applicant: Apple Inc.

Inventor： Udar Mittal ,  Xiaowen Wang ,  Haitong Sun ,  Yushu Zhang ,  Wei Zeng ,  Theodoros Kamakaris ,  Joseph Hakim

IPC: H04W24/10 ,  H04W72/54 ,  H04W76/14

CPC classification number: H04W24/10 ,  H04W72/54 ,  H04W76/14

Abstract: This disclosure relates to techniques for coordinated channel state information reporting in a wireless communication system. A wireless device may establish a wireless link with a cellular base station. The wireless device may determine to coordinate channel state information reporting with another wireless device. Information may be exchanged with the other wireless device via a sidelink wireless link. The wireless device may provide channel state information to the cellular base station. The channel state information may be determined based at least in part on the information exchanged with the other wireless device via the sidelink wireless link.

公开(公告)号：US20230090911A1

公开(公告)日：2023-03-23

申请号：US17707587

申请日：2022-03-29

Applicant: Apple Inc.

Inventor： Xiaowen Wang ,  Zhengnan Li ,  Daniel R. Borges ,  Joseph Hakim

IPC: H04L5/00 ,  H04W76/14 ,  H04W76/15

Abstract: This disclosure relates to methods for low latency orthogonal frequency division multiple access communication, according to some embodiments. A wireless device may determine to communicate with another wireless device on a frequency channel as a pair of wireless devices. The wireless device may coordinate with a set of wireless device pairs to share medium access on the frequency channel. The wireless device communicate with the paired wireless device on the frequency channel in a frequency division multiplexing configuration with the set of wireless device pairs.

公开(公告)号：US11564169B2

公开(公告)日：2023-01-24

申请号：US16012935

申请日：2018-06-20

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Oren Shani ,  Yong Liu ,  Xiaowen Wang ,  Yoel Boger ,  Christiaan A. Hartman ,  Christian W. Mucke ,  Tushar R. Shah ,  Matthew L. Semersky ,  Josef Peery

IPC: H04W52/02 ,  H04L25/02 ,  H04B17/336 ,  H04B1/00 ,  H04W84/12

Abstract: An interface circuit in a device, e.g., an access point, may perform link adaptation. During operation, the interface circuit may provide a wake-up frame, e.g., a LP-WUR packet, associated with a channel in a band of frequencies, where the wake-up frame is intended for a wake-up radio in a recipient device. Then, the interface circuit may receive, from the recipient device, feedback information associated with a second channel in a second band of frequencies, where the feedback information is associated with a main radio in the recipient device. Based at least in part on the feedback information, the interface circuit may estimate one or more communication metrics associated with the channel in the band of frequencies. Moreover, based at least in part on the one or more communication metrics, the interface circuit may determine a data rate for use in communication via the channel in the band of frequencies.

公开(公告)号：US10993117B2

公开(公告)日：2021-04-27

申请号：US16214472

申请日：2018-12-10

Applicant: APPLE INC.

Inventor： Tianyan Pu ,  Farouk Belghoul ,  Wei Zeng ,  Wei Zhang ,  Xiaowen Wang ,  Yang Li ,  Ping Wang ,  Haitong Sun ,  Beibei Wang ,  Yuchul Kim ,  Johnson O. Sebeni ,  Dawei Zhang ,  Sami M. Almalfouh ,  Zhu Ji ,  Sunny Arora

IPC: H04W16/14 ,  H04W24/10 ,  H04W72/04 ,  H04W24/08 ,  H04W48/12 ,  H04W74/08 ,  H04W48/16

Abstract: An evolved Node B (eNB) serves as a primary serving cell (PCell) providing a primary component carrier (PCC) in a licensed spectrum to a user equipment (UE) in a carrier aggregation (CA) scheme. A secondary component carrier (SCC) is provided in an unlicensed spectrum. The eNB monitors parameters of bandwidths in the unlicensed spectrum, when at least one of the parameters indicates a change in availability of a select one of the bandwidths, the eNB generates a control indicator defining the change in availability of the bandwidth and broadcasts the control indicator to the UE, wherein the control indicator affects a modification in a transceiver of the UE associated with the bandwidth.

公开(公告)号：US10728734B2

公开(公告)日：2020-07-28

申请号：US16125799

申请日：2018-09-10

Applicant: Apple Inc.

Inventor： Yuchul Kim ,  Xiaowen Wang ,  Tarik Tabet ,  Dawei Zhang ,  Syed Aon Mujtaba

IPC: H04W8/00 ,  H04W52/24 ,  H04W52/02 ,  H04W76/14

Abstract: In some embodiments, a user equipment device (UE) implements a method for discovering the presence of neighboring UEs using an on-demand discovery signal transmission technique. This discovery process may be performed to enable the UEs to perform peer-to-peer communications with each other, wherein peer-to-peer communications is defined as direct communication between the UEs without involving a base station. The UE may be configured to transmit a discovery request signal when it has moved greater than a threshold amount since transmission of a prior discovery request signal. The discovery request signal causes one or more neighboring UEs to each transmit a discovery signal in response, and also causes the UE which generated the discovery request signal to transmit its own discovery signal. The received discovery signal from each of the neighboring UEs is useable to discover, or detect the presence of, these neighboring UEs.

公开(公告)号：US10470126B2

公开(公告)日：2019-11-05

申请号：US15461162

申请日：2017-03-16

Applicant: APPLE INC.

Inventor： Joonsuk Kim ,  Syed A. Mujtaba ,  Xiaowen Wang

IPC: G08C17/00 ,  H04W52/02

Abstract: In order to reduce power consumption of an electronic device during communication with another electronic device in a wireless local area network (WLAN), the electronic device analyzes fields in a given packet prior to a payload of the given packet to look for information that specifies a destination of the given packet. For example, the information may include: a full associated identification (AID) of the destination, a partial media-access-control (MAC) address of the destination; and/or a compressed (MAC) address of the destination. The information may be included in the preamble of the given packet. In particular, the information may replace length information in a high-throughput signal field in the given packet. Moreover, if the destination is other than the electronic device, the electronic device dumps the given packet and changes a power state of the electronic device, thereby reducing the power consumption.

公开(公告)号：US20180364338A1

公开(公告)日：2018-12-20

申请号：US16041874

申请日：2018-07-23

Applicant: Apple Inc.

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: G01S7/486 ,  G01S5/14 ,  G01S17/10 ,  H04L1/00 ,  H04L27/34 ,  H04W64/00

CPC classification number: G01S7/4865 ,  G01S5/145 ,  G01S11/02 ,  G01S11/08 ,  G01S17/102 ,  H04L1/0004 ,  H04L27/0008 ,  H04L27/18 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2692 ,  H04L27/34 ,  H04W4/023 ,  H04W64/00 ,  H04W64/003

Abstract: Some embodiments relate to a waveform design for time-of-flight estimation in a wireless communication system. The waveform may include a number N of signal tones, wherein the number N of signal tones is greater than a number M of signal tones that the receiving wireless device is configured to decode. Upon receipt of the waveform, the receiving wireless device may store a timestamp which indicates a time of receipt of the waveform. The receiving wireless device may decode M of the N signal tones. For example, the receiving wireless device may decode the middle M signal tones of the N signal tones. One or more of the transmitting or receiving wireless devices may then estimate a distance between them based at least in part on the timestamp.

公开(公告)号：US09960865B2

公开(公告)日：2018-05-01

申请号：US14152739

申请日：2014-01-10

Applicant: Apple Inc.

Inventor： Xiaowen Wang ,  Vinay R. Majjigi ,  Syed A. Mujtaba ,  Christopher J. Hansen

IPC: H04B17/318 ,  H04W48/16 ,  H04B17/26

CPC classification number: H04B17/318 ,  H04B17/26 ,  H04W48/16

Abstract: A station (STA) can receive messages (e.g., beacon frames) at a regular interval, and perform measurements on the received messages. The STA maintains a running average of recent measurement values, and updates the running average after each new measurement interval. At some measurement opportunities, the expected messages cannot be received by the STA, and so the STA cannot perform a measurement; when this occurs, the STA can choose substitute values to use for the missed measurements when next calculating the running average. As one example, the STA can substitute the value for a previously-performed measurement for the missed measurements. As another example, the STA can substitute a predetermined low value for the missed measurements. Based on the value of the running average at a given point in time, the STA can take actions such as initiating a roaming scan or switching to a different wireless interface.