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    Wi-Fi adaptive transmit antenna selection
    72.
    发明授权
    Wi-Fi adaptive transmit antenna selection 有权

    公开(公告)号：US09768825B2

    公开(公告)日：2017-09-19

    申请号：US14871756

    申请日：2015-09-30

    Applicant: Apple Inc.

    Inventor： Xiaowen Wang ,  Syed Aon Mujtaba ,  Vinay R. Majjigi ,  Joonsuk Kim

    IPC: H04B7/00 ,  H04B1/40 ,  H04B7/06 ,  H04B7/08 ,  H04W88/08 ,  H04W84/12

    CPC classification number: H04B1/40 ,  H04B7/061 ,  H04B7/0817 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/10

    Abstract: Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking.

    System and method for partial bandwidth communication
    73.
    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.

    Opportunistic Secondary Channel Access
    75.
    发明申请
    Opportunistic Secondary Channel Access 审中-公开
    机会二级渠道访问

    公开(公告)号：US20160316470A1

    公开(公告)日：2016-10-27

    申请号：US15099859

    申请日：2016-04-15

    Applicant: Apple Inc.

    Inventor： Chiu Ngok E. Wong ,  Joonsuk Kim ,  Christiaan A. Hartman ,  Guoqing Li ,  Su Khiong Yong ,  Yong Liu

    IPC: H04W72/04 ,  H04W76/06

    CPC classification number: H04W72/0446 ,  H04L27/0006 ,  H04W16/14 ,  H04W72/0453 ,  H04W76/38 ,  H04W84/12

    Abstract: In embodiments, a wireless device, such as a Wi-Fi device, transmits communication signals on secondary channels within an operational bandwidth of a wireless network, concurrent with a transmission from another wireless device on a primary channel. The wireless device may detect that a first frequency band within an operating bandwidth of a wireless network is occupied by a first transmission transmitted by a second wireless device, and determine that a second, different frequency band within the operating bandwidth of the wireless network is not occupied. In response, the wireless device may transmit a second transmission occupying the second frequency band concurrent with the first transmission. The wireless device may set a duration of the second transmission based at least in part on a determination of whether the second wireless device is configured to assess the state of all frequency bands within the operating bandwidth before beginning a subsequent transmission.

    Abstract translation: 在实施例中，诸如Wi-Fi设备的无线设备在与主信道上的另一无线设备的传输同时在无线网络的操作带宽内的辅信道上发送通信信号。 无线设备可以检测无线网络的工作带宽内的第一频带被第二无线设备发送的第一传输占用，并且确定无线网络的工作带宽内的第二不同频带不是 占据。 作为响应，无线设备可以与第一传输同时发送占用第二频带的第二传输。 至少部分地基于确定所述第二无线设备是否被配置为在开始后续传输之前评估所述工作带宽内的所有频带的状态，所述无线设备可以设置所述第二传输的持续时间。

    Spatial Contention in Dense Wireless Network
    76.
    发明申请
    Spatial Contention in Dense Wireless Network 有权
    密集无线网络空间争夺

    公开(公告)号：US20160309357A1

    公开(公告)日：2016-10-20

    申请号：US15082505

    申请日：2016-03-28

    Applicant: Apple Inc.

    Inventor： Chiu Ngok E. Wong ,  Christiaan A. Hartman ,  Guoqing Li ,  Joonsuk Kim ,  Su Khiong Yong ,  Yong Liu

    IPC: H04W28/02 ,  H04L1/00 ,  H04L12/26

    CPC classification number: H04L1/0026 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0021 ,  H04L47/29 ,  H04W28/0236 ,  H04W74/0808 ,  H04W84/12

    Abstract: In some embodiments, a first wireless device initializes a first threshold and sends a first frame transmission to a second wireless device. When the first wireless device determines that the first frame transmission was successful, it adjusts the first threshold to a second threshold that is greater than the first threshold. Additionally, when the first wireless device determines that the first frame transmission was not successful, the first wireless device adjusts the first threshold to a third threshold that is less than the first threshold. The thresholds can be associated with any measure, including carrier sensitivity and/or energy detection.

    Abstract translation: 在一些实施例中，第一无线设备初始化第一阈值并将第一帧传输发送到第二无线设备。 当第一无线设备确定第一帧传输成功时，它将第一阈值调整到大于第一阈值的第二阈值。 此外，当第一无线设备确定第一帧传输不成功时，第一无线设备将第一阈值调整为小于第一阈值的第三阈值。 阈值可以与任何措施相关联，包括载波灵敏度和/或能量检测。

    OFDMA Indication and Communication in WLANs
    77.
    发明申请
    OFDMA Indication and Communication in WLANs 有权
    OFDMA在WLAN中的指示和通信

    公开(公告)号：US20160205686A1

    公开(公告)日：2016-07-14

    申请号：US14989924

    申请日：2016-01-07

    Applicant: Apple Inc.

    Inventor： Joonsuk Kim ,  Guoqing Li ,  Chiu Ngok E. Wong

    IPC: H04W72/04 ,  H04L5/00

    CPC classification number: H04L5/0048 ,  H04L1/12 ,  H04L1/1854 ,  H04L5/0023 ,  H04L25/0202 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675 ,  H04W56/002 ,  H04W84/12

    Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, an indication may be transmitted to receiving devices that a first frame is an OFDMA frame. Channel information indicating allocation of bandwidth portions of the first frame to respective receiving devices may also be transmitted to the receiving devices. The first frame may be transmitted to the receiving devices, including transmitting data to each respective receiving device on the bandwidth portion(s) allocated to the respective receiving device.

    Abstract translation: 本公开涉及无线局域网（WLAN）中的正交频分多址（OFDMA）通信。 根据一些实施例，可以向接收设备发送指示第一帧是OFDMA帧的指示。 指示将第一帧的带宽部分分配给各个接收装置的信道信息也可以被发送到接收装置。 第一帧可以被发送到接收设备，包括将数据发送到分配给相应接收设备的带宽部分上的每个相应的接收设备。

    Wireless Network Throughput Estimation
    78.
    发明申请
    Wireless Network Throughput Estimation 审中-公开
    无线网络吞吐量估算

    公开(公告)号：US20160007359A1

    公开(公告)日：2016-01-07

    申请号：US14790882

    申请日：2015-07-02

    Applicant: Apple, Inc.

    Inventor： Yuchul Kim ,  Joonsuk Kim

    IPC: H04W72/04 ,  H04W28/02 ,  H04W24/02

    CPC classification number: H04W28/0289 ,  H04W24/04 ,  H04W28/0205 ,  H04W28/0231 ,  H04W88/08

    Abstract: This disclosure relates to estimating throughput of wireless networks by a wireless device. According to some embodiments, estimated uplink and downlink actual temporal load available to a wireless device in a wireless network may be determined. An uplink data rate and a downlink data rate of the wireless device in the wireless network may be estimated. Based on the estimated uplink and downlink actual temporal load available to the wireless device and the estimated uplink and downlink data rates of the wireless device, the maximum possible uplink throughput and downlink throughput of the wireless device in the wireless network may be estimated. Such throughput estimates may be used to select a wireless network to join from among multiple available wireless networks or to select an initial data rate for an application executing on the wireless device, among possible uses.

    Abstract translation: 本公开涉及通过无线设备估计无线网络的吞吐量。 根据一些实施例，可以确定可用于无线网络中的无线设备的估计上行链路和下行链路实际时间负载。 可以估计无线网络中的无线设备的上行链路数据速率和下行链路数据速率。 基于无线设备可用的估计上行链路和下行链路实际时间负载以及无线设备的估计的上行链路和下行链路数据速率，可以估计无线网络中的无线设备的最大可能的上行链路吞吐量和下行链路吞吐量。 这样的吞吐量估计可以用于选择从多个可用无线网络中加入的无线网络，或者可以在可能的用途中选择在无线设备上执行的应用的初始数据速率。

    WLAN AND LTE COEXISTENCE IN UNLICENSED RADIO FREQUENCY BANDS
    80.
    发明申请
    WLAN AND LTE COEXISTENCE IN UNLICENSED RADIO FREQUENCY BANDS 有权
    无线和无线电频段中的WLAN和LTE共存

    公开(公告)号：US20150208253A1

    公开(公告)日：2015-07-23

    申请号：US14502790

    申请日：2014-09-30

    Applicant: Apple Inc.

    Inventor： Joonsuk Kim ,  Yong Liu ,  Harish Ramamurthy

    IPC: H04W24/02 ,  H04L27/26 ,  H04W72/08 ,  H04W16/14

    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。

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