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    CONTROLLED SPATIAL REUSE IN A WLAN
    2.
    发明申请
    CONTROLLED SPATIAL REUSE IN A WLAN 审中-公开

    公开(公告)号：US20170311166A1

    公开(公告)日：2017-10-26

    申请号：US15498358

    申请日：2017-04-26

    Applicant: Apple Inc.

    Inventor： Guoqing LI ,  Christiaan A. HARTMAN ,  Jarkko KNECKT ,  Yong LIU ,  Su Khiong YONG ,  Joonsuk KIM ,  Oren SHANI

    IPC: H04W16/02 ,  H04W52/26 ,  H04W72/04 ,  H04B17/24 ,  H04W88/08 ,  H04L12/931 ,  H04W84/12

    CPC classification number: H04W16/02 ,  H04L49/201 ,  H04W52/367 ,  H04W74/006 ,  H04W84/12 ,  H04W88/08

    Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.

    CHANNEL ACCESS POLICY CONTROL DURING WIRELESS COMMUNICATION
    5.
    发明申请
    CHANNEL ACCESS POLICY CONTROL DURING WIRELESS COMMUNICATION 审中-公开

    公开(公告)号：US20170202015A1

    公开(公告)日：2017-07-13

    申请号：US15403092

    申请日：2017-01-10

    Applicant: Apple Inc.

    Inventor： Guoqing LI ,  Christiaan A. HARTMAN ,  Ashok RANGANATH ,  Joonsuk KIM ,  Matthew L. SEMERSKY ,  Oren SHANI ,  Su Khiong YONG ,  Yong LIU

    IPC: H04W74/02 ,  H04W74/00

    CPC classification number: H04W74/02 ,  H04W74/006 ,  H04W84/12

    Abstract: An access point selects a channel access policy for an electronic device in a wireless local area network (WLAN). During operation, an interface circuit of the access point receives a channel access preference from the electronic device. The channel access preference includes: a multi-user trigger-based channel access technique, a single-user contention-based channel access technique, or both. The interface circuit selects the channel access policy for the electronic device based, at least in part, on the received channel access preference. The channel access policy can also be selected based at least in part on a communication performance metric associated with communication in the WLAN. The interface circuit communicates the selected channel access policy to the electronic device, which subsequently accesses a communication channel and communicates packets with the access point in accordance with the channel access policy.

    UPLINK SOUNDING IN A WIRELESS LOCAL AREA NETWORK
    6.
    发明申请
    UPLINK SOUNDING IN A WIRELESS LOCAL AREA NETWORK 审中-公开

    公开(公告)号：US20170093600A1

    公开(公告)日：2017-03-30

    申请号：US15279260

    申请日：2016-09-28

    Applicant: Apple Inc.

    Inventor： Guoqing LI ,  Joonsuk KIM ,  Yong LIU ,  Christiaan A. HARTMAN ,  Su Khiong YONG

    IPC: H04L25/02 ,  H04L5/00

    CPC classification number: H04L25/0224 ,  H04L5/0037 ,  H04L5/0048 ,  H04W84/12

    Abstract: Time, frequency and waveform division multiplex schemes are used to efficiently estimate multiple uplink channels in a Wireless Local Area Network (WLAN). Orthogonal Frequency Division Multiple Access (OFDMA) and multi-user Multiple Input Multiple Output (MU-MIMO) approaches provide efficient uplink data transmission. An Access Point (AP) communicates with multiple Stations (STAs) in the WLAN. In some approaches, two or more STAs are addressed and the two or more STAs respond at the same time. The AP receives a composite signal and separates the responses to estimate the uplink channel from each STA. After the AP learns the uplink channels, the AP triggers data transmission from one or more of the WLAN STAs by sending a synchronizing trigger message. In some embodiments, the STAs respond simultaneously with data transmissions to the AP.

    SELECTION OF SYNCHRONIZATION STATIONS IN A PEER-TO-PEER NETWORK ENVIRONMENT
    7.
    发明申请
    SELECTION OF SYNCHRONIZATION STATIONS IN A PEER-TO-PEER NETWORK ENVIRONMENT 审中-公开
    选择同侪网络环境中的同步站

    公开(公告)号：US20170013579A1

    公开(公告)日：2017-01-12

    申请号：US15270810

    申请日：2016-09-20

    Applicant: Apple Inc.

    Inventor： Robert J. STACEY ,  Pierre B. VANDWALLE ,  Christiaan A. HARTMAN

    IPC: H04W56/00 ,  H04W72/12 ,  H04L29/08

    CPC classification number: H04W56/0015 ,  H04L67/1089 ,  H04L67/1095 ,  H04W4/80 ,  H04W72/1215 ,  H04W84/20 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/20

    Abstract: A system, apparatus and method for selecting one or more synchronization stations, or masters, in a peer-to-peer communication environment. Synchronization (or sync) stations broadcast periodic synchronization frames to advertise future availability windows, during which devices rendezvous for discovery and communication. Devices that can act as sync stations advertise preference values, which indicate their preference or suitability for the role. All devices execute the same algorithm to sort the preference values and identify a root sync station and any number of branch sync stations; leaf devices synchronize with the root or a branch sync station. This passive synchronization scheme allows individual devices to conserve power, because they need not actively discover other devices and services, and can power off their radios for periods of time without sacrificing discoverability. Synchronization and peer-to-peer communication as provided herein coexist with other device demands, such as Bluetooth® operations and infrastructure-based communications.

    Abstract translation: 一种用于在对等通信环境中选择一个或多个同步站或主站的系统，装置和方法。 同步（或同步）站广播周期性同步帧以通告未来可用性窗口，在此期间，设备会合用于发现和通信。 可以充当同步站的设备会发布偏好值，这表明它们对该角色的偏好或适用性。 所有设备执行相同的算法对优先级值进行排序，并识别根同步站和任意数量的分支同步站; 叶设备与根或分支同步站同步。 这种无源同步方案允许单个设备节省电力，因为它们不需要主动发现其他设备和服务，并且可以在不牺牲可发现性的情况下关闭其无线电一段时间。 如本文提供的同步和对等通信与其他设备需求（如蓝牙®操作和基于基础设施的通信）共存。

    Discovery Frames and Group Addressed Frames Transmission
    8.
    发明申请
    Discovery Frames and Group Addressed Frames Transmission 审中-公开

    公开(公告)号：US20200221292A1

    公开(公告)日：2020-07-09

    申请号：US16733489

    申请日：2020-01-03

    Applicant: Apple Inc.

    Inventor： Guoqing LI ,  Christiaan A. HARTMAN ,  Yong LIU ,  Jarkko L. KNECKT

    IPC: H04W8/26 ,  H04L29/12 ,  H04W76/11

    Abstract: Some embodiments of this disclosure include apparatuses and methods for implementing discovery frames and group addressed frames communication. For example, some embodiments relate to a method including generating a first frame to be transmitted to a first electronic device. An association identifier (AID) value of the first frame is set to a first value to indicate that the first frame is an individually addressed frame addressed to the first electronic device. The method further includes generating a second frame to be transmitted to a group of one or more electronic devices. An AID value of the second frame is set to a second value different from the first value. The method also includes transmitting the first frame and the second frame.

    Target Wake Time Scheme for Multicast Communication
    9.
    发明申请
    Target Wake Time Scheme for Multicast Communication 审中-公开

    公开(公告)号：US20200045634A1

    公开(公告)日：2020-02-06

    申请号：US16403983

    申请日：2019-05-06

    Applicant: Apple Inc.

    Inventor： Jarkko L. KNECKT ,  Christiaan A. HARTMAN ,  Qi WANG ,  Su Khiong YONG ,  Yong LIU

    IPC: H04W52/02 ,  H04L12/18 ,  H04W40/24

    Abstract: Some embodiments of this disclosure include apparatuses and methods for implementing a target wake time (TWT) technique for multicast communication. For example, some embodiments relate to a method including configuring a target wake time (TWT) process for delivering one or more multicast packets to a group of electronic devices. The method further includes determining that a service period associated with the TWT process has started and transmitting, in accordance with the TWT process, the one or more multicast packets during the service period, where the one or more transmitted multicast packets are addressed to the group of electronic devices.

    ACCESS-CATEGORY-BASED MULTI-USER TRIGGER FRAMES
    10.
    发明申请
    ACCESS-CATEGORY-BASED MULTI-USER TRIGGER FRAMES 审中-公开

    公开(公告)号：US20190386793A1

    公开(公告)日：2019-12-19

    申请号：US16459544

    申请日：2019-07-01

    Applicant: Apple Inc.

    Inventor： Guoqing LI ,  Yong LIU ,  Christiaan A. HARTMAN ,  Ashok RANGANATH ,  Oren SHANI ,  Su Khiong YONG ,  Jarkko L. KNECKT ,  Joonsuk KIM

    IPC: H04L5/00 ,  H04W74/06 ,  H04L12/801

    Abstract: During operation, an interface circuit in an electronic device may receive, from a second electronic device (such as an access point in a WLAN), an uplink trigger frame that may specify an access category. In response to the uplink trigger frame, the electronic device may first include data associated with the specified access category in one or more frames, and then may transmit the one or more frames to the second electronic device. Moreover, when all the data associated with the specified access category has been transmitted or when there is no data associated with the specified access category, and when there is leftover time in an allocation associated with the uplink trigger frame, the interface circuit may transmit the one or more frames to the second electronic device with additional data associated with another access category that is different from the specified access category.

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