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    System and Method for Low Power Signaling in a Wireless Local Area Network
    1.
    发明申请
    System and Method for Low Power Signaling in a Wireless Local Area Network 审中-公开

    公开(公告)号：US20180302854A1

    公开(公告)日：2018-10-18

    申请号：US16012969

    申请日：2018-06-20

    Applicant: APPLE INC.

    Inventor： Harish Ramamurthy ,  Joonsuk Kim ,  Yong Liu ,  Christopher Hansen

    IPC: H04W52/02 ,  H04W84/12 ,  H04W88/08

    Abstract: A station, a method performed by a station and a corresponding method performed by an access point (AP) of a network to allow the station to operate a wireless local area network (WLAN) radio in a sleep state until the WLAN radio is ready to receive a beacon from the AP. The station includes a low power (LP) radio configured to receive a wake up signal from an AP of a network to which the station is connected. The station further includes a WLAN radio configured to operate in a sleep state until the WLAN radio receives an indication from the LP radio that the wakeup signal has been received, wherein WLAN radio is further configured to operate in a fully awake state after receipt of the indication to receive a beacon from the AP indicating a data transmission is pending for the station.

    Wireless multicast communication
    2.
    发明授权
    Wireless multicast communication 有权

    公开(公告)号：US10212694B2

    公开(公告)日：2019-02-19

    申请号：US15618960

    申请日：2017-06-09

    Applicant: Apple Inc.

    Inventor： Harish Ramamurthy ,  Kapil Chhabra ,  Matthew L. Semersky ,  Daniel R. Borges ,  Charles F. Dominguez

    IPC: H04W72/00 ,  H04W72/12 ,  H04L1/16 ,  H04L1/18 ,  H04L1/20 ,  H04L1/00

    Abstract: This document describes multicast communication between wireless devices. A scheduling frame may be wirelessly transmitted by a wireless device. The scheduling frame may include a multicast address indicating a group of intended receiving devices for a payload frame. The scheduling frame may further include scheduling information indicating an order for the group of intended receiving devices to transmit acknowledgement information for the payload frame. A payload frame may also be wirelessly transmitted by the wireless device. The payload frame may include payload information intended for the group of intended receiving devices. Additionally, acknowledgement frames may be wirelessly received by the wireless device from at least a subset of the group of intended receiving devices. The acknowledgement frames may be received according to the order indicated in the scheduling information.

    WLAN and LTE coexistence in unlicensed radio frequency bands
    3.
    发明授权
    WLAN and LTE coexistence in unlicensed radio frequency bands 有权
    WLAN和LTE在未经许可的射频频段共存

    公开(公告)号：US09532243B2

    公开(公告)日：2016-12-27

    申请号：US14502790

    申请日：2014-09-30

    Applicant: Apple Inc.

    Inventor： Joonsuk Kim ,  Yong Liu ,  Harish Ramamurthy

    IPC: H04L12/26 ,  H04W24/02 ,  H04W16/14 ,  H04L27/26 ,  H04L27/00 ,  H04L5/00 ,  H04W74/08

    CPC classification number: H04W24/02 ,  H04L5/001 ,  H04L27/0006 ,  H04L27/2614 ,  H04W16/14 ,  H04W74/0808

    Abstract: A wireless local area network (WLAN) device processes received samples for a radio frequency channel in an unlicensed radio frequency band to detect radio frequency interference from a long term evolution (LTE) wireless communication system. The WLAN device performs a correlation of received time-domain samples to detect the presence of a cyclic prefix for an orthogonal frequency division multiplexing (OFDM) symbol used by the LTE wireless communication system. The WLAN device searches for cross-correlation peaks (1) that exceed a peak power threshold value, (2) that a ratio of which exceed a ratio threshold, and (3) that are separated by a time period corresponding to the OFDM symbol. The WLAN device detects the presence of the LTE wireless communication system without decoding the OFDM symbols.

    Abstract translation: 无线局域网（WLAN）设备处理非许可射频频带中的射频信道的接收样本，以检测来自长期演进（LTE）无线通信系统的射频干扰。 WLAN设备执行接收的时域采样的相关性，以检测LTE无线通信系统使用的正交频分复用（OFDM）符号的循环前缀的存在。 WLAN设备搜索超过峰值功率阈值的互相关峰值（1），（2）其比率超过比率阈值，和（3）被与OFDM符号相对应的时间间隔分隔开。 WLAN设备在不解码OFDM符号的情况下检测LTE无线通信系统的存在。

    System and method for low power signaling in a wireless local area network
    4.
    发明授权
    System and method for low power signaling in a wireless local area network 有权

    公开(公告)号：US10681632B2

    公开(公告)日：2020-06-09

    申请号：US16012969

    申请日：2018-06-20

    Applicant: APPLE INC.

    Inventor： Harish Ramamurthy ,  Joonsuk Kim ,  Yong Liu ,  Christopher Hansen

    IPC: H04W52/02 ,  H04W84/12 ,  H04W88/08

    Abstract: A station, a method performed by a station and a corresponding method performed by an access point (AP) of a network to allow the station to operate a wireless local area network (WLAN) radio in a sleep state until the WLAN radio is ready to receive a beacon from the AP. The station includes a low power (LP) radio configured to receive a wake up signal from an AP of a network to which the station is connected. The station further includes a WLAN radio configured to operate in a sleep state until the WLAN radio receives an indication from the LP radio that the wakeup signal has been received, wherein WLAN radio is further configured to operate in a fully awake state after receipt of the indication to receive a beacon from the AP indicating a data transmission is pending for the station.

    MULTICHANNEL WIRELESS LOCAL AREA NETWORK
    6.
    发明申请
    MULTICHANNEL WIRELESS LOCAL AREA NETWORK 审中-公开
    多通道无线局域网

    公开(公告)号：US20150207578A1

    公开(公告)日：2015-07-23

    申请号：US14502780

    申请日：2014-09-30

    Applicant: Apple Inc.

    Inventor： Harish Ramamurthy ,  Joonsuk Kim ,  Yong Liu ,  Christopher J. Hansen

    IPC: H04J1/08

    CPC classification number: H04W72/0453 ,  H04W84/12 ,  H04W88/08

    Abstract: A multichannel wireless local area network (WLAN) using multiple radio frequency (RF) channels simultaneously for a basic service set (BSS) is described. The multichannel WLAN provides efficient use of RF bandwidth and improves throughput. An access point of the multichannel WLAN communicates with client devices using at least two parallel RF channels, which can be located in two different RF bands. The access point supports connections to client devices using a “legacy” mode over a single logical channel mapped to a single RF channel and includes data traffic, control traffic, and management frames combined. The access point also supports connections to client devices using a high efficiency WLAN mode having multiple logical channels, each logical channel associated with one or more physical RF channels. The multiple logical channels include a management channel for management frames and a separate high efficiency WLAN data channel to carry data traffic and control traffic.

    Abstract translation: 描述了为基本服务集（BSS）同时使用多个射频（RF）信道的多信道无线局域网（WLAN）。 多通道WLAN提供有效利用RF带宽并提高吞吐量。 多通道WLAN的接入点使用至少两个可以位于两个不同RF频带中的并行RF信道与客户端设备进行通信。 接入点支持通过映射到单个RF信道的单个逻辑信道上的“传统”模式连接到客户端设备，并且包括组合的数据业务，控制业务和管理帧。 接入点还支持使用具有多个逻辑信道的高效率WLAN模式到每个逻辑信道与一个或多个物理RF信道相关联的客户端设备的连接。 多个逻辑信道包括用于管理帧的管理信道和单独的高效率WLAN数据信道来承载数据业务并控制业务。

    Wireless Multicast Communication
    7.
    发明申请
    Wireless Multicast Communication 有权
    无线组播通信

    公开(公告)号：US20150092652A1

    公开(公告)日：2015-04-02

    申请号：US14088898

    申请日：2013-11-25

    Applicant: Apple Inc.

    Inventor： Harish Ramamurthy ,  Kapil Chhabra ,  Matthew L. Semersky ,  Daniel R. Borges ,  Charles F. Dominguez

    IPC: H04W72/00

    CPC classification number: H04W72/005 ,  H04L1/1614 ,  H04L1/1685 ,  H04L1/1854 ,  H04L1/1867 ,  H04L1/203 ,  H04L2001/0093 ,  H04W72/1289

    Abstract: This document describes multicast communication between wireless devices. A scheduling frame may be wirelessly transmitted by a wireless device. The scheduling frame may include a multicast address indicating a group of intended receiving devices for a payload frame. The scheduling frame may further include scheduling information indicating an order for the group of intended receiving devices to transmit acknowledgement information for the payload frame. A payload frame may also be wirelessly transmitted by the wireless device. The payload frame may include payload information intended for the group of intended receiving devices. Additionally, acknowledgement frames may be wirelessly received by the wireless device from at least a subset of the group of intended receiving devices. The acknowledgement frames may be received according to the order indicated in the scheduling information.

    Abstract translation: 本文档描述了无线设备之间的组播通信。 调度帧可以由无线设备无线发送。 调度帧可以包括指示用于有效载荷帧的一组预期接收设备的多播地址。 调度帧还可以包括指示预定接收设备组的顺序的调度信息，以发送有效载荷帧的确认信息。 有效载荷帧也可以由无线设备无线传输。 有效载荷帧可以包括旨在用于预期接收设备组的有效载荷信息。 另外，确认帧可以由无线设备从预期接收设备组的至少一个子集无线地接收。 可以根据调度信息中指示的顺序接收确认帧。

    System and method for partial bandwidth communication
    10.
    发明授权
    System and method for partial bandwidth communication 有权

    公开(公告)号：US09680563B2

    公开(公告)日：2017-06-13

    申请号：US14502771

    申请日：2014-09-30

    Applicant: APPLE INC.

    Inventor： Joonsuk Kim ,  Yong Liu ,  Christopher Hansen ,  Harish Ramamurthy

    IPC: H04W4/00 ,  H04B7/26 ,  H04L5/00

    CPC classification number: H04B7/2621 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0064 ,  H04L5/0092

    Abstract: A system and method for partial bandwidth communication. The system includes a device that has a transceiver configured to connect to a network, a memory storing an executable program and a processor. The program causes the processor to perform operations including receiving data to be transmitted to second device, determining if the data uses less than a predetermined bandwidth used as a unit for a carrier aggregation, determining a plurality of sub-bands in the predetermined bandwidth, each sub-band including at least one pilot and a plurality of frequency tones, receiving network information from the second device, the network information indicating a preferred sub-band of the sub-bands, assigning one of the sub-bands to the second device based upon the network information, generating a packet including an indication, the indication indicating the assigned sub-band; transmitting the packet to the second device and transmitting the data in the assigned sub-band.

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