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    Spatial Reuse Parameters for Opportunistic Adaptive TPC and CCA
    12.
    发明申请
    Spatial Reuse Parameters for Opportunistic Adaptive TPC and CCA 有权
    机会自适应TPC和CCA的空间重用参数

    公开(公告)号：US20170070962A1

    公开(公告)日：2017-03-09

    申请号：US15257074

    申请日：2016-09-06

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Jianhan Liu ,  Chao-Chun Wang ,  YungPing Hsu

    IPC: H04W52/24 ,  H04W16/02 ,  H04B17/345 ,  H04W74/08

    CPC classification number: H04W52/243 ,  H04B17/345 ,  H04W16/02 ,  H04W52/146 ,  H04W52/241 ,  H04W52/242 ,  H04W52/245 ,  H04W52/247 ,  H04W52/50 ,  H04W74/0816 ,  H04W84/12

    Abstract: A method of spatial reuse with opportunistic transmit power control (TPC) and clear channel assessment (CCA) is proposed. In the opportunistic TPC and CCA, a spatial reuse station (SR-STA) gains enough knowledge in certain situation for more aggressive spatial reuse such that its transmit power may be adjusted to meet the spatial reuse conditions based on the received OBSS PPDU and the corresponding spatial reuse parameter (SRP). Both Type 1 SRP and Type 2 SRP are defined. In one example, the Type 1 or Type 2 SRP is a 5-bit parameter carried in the HE-SIG-A field of the OBSS PPDU, which can be a trigger frame, a response frame, a request-to-send (RTS)/clear-to-send (CTS) frame, and a data frame.

    Abstract translation: 提出了一种利用机会性发射功率控制（TPC）和清晰信道评估（CCA）进行空间重用的方法。 在机会主义TPC和CCA中，空间重用站（SR-STA）在某些情况下获得足够的知识以进行更积极的空间重用，使得其发射功率可以被调整以满足基于接收到的OBSS PPDU和对应的空间重用条件 空间复用参数（SRP）。 定义了Type 1 SRP和Type 2 SRP。 在一个示例中，类型1或类型2 SRP是OBSS PPDU的HE-SIG-A字段中携带的5位参数，其可以是触发帧，响应帧，请求发送（RTS ）/清除发送（CTS）帧和数据帧。

    Joint Position Detection by Sensor Devices
    13.
    发明申请
    Joint Position Detection by Sensor Devices 审中-公开
    传感器设备的联合位置检测

    公开(公告)号：US20160135136A1

    公开(公告)日：2016-05-12

    申请号：US14937606

    申请日：2015-11-10

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Ching-Hwa Yu ,  Kai-Chun Chou ,  Chih-Shi Yee

    IPC: H04W56/00

    CPC classification number: H04W56/001 ,  G01S5/021 ,  G01S5/0221 ,  G01S5/06 ,  G01S5/12 ,  G01S5/14 ,  H04W64/00 ,  H04W84/12 ,  H04W84/18

    Abstract: A method of joint position detection by a plurality of known location sensor devices is proposed in an indoor wireless local area network. A tag can query the sensors by sending a request. Timestamps of the query signal are recorded by the sensors. A known location designated sensor responds to the request and triggers a process to correct the clock offsets of other sensors. The timestamps are then corrected based on the clock offsets. The corrected timestamps are then sent to a position processor for determining the tag location.

    Abstract translation: 在室内无线局域网中提出了一种通过多个已知位置传感器装置进行联合位置检测的方法。 标签可以通过发送请求来查询传感器。 查询信号的时间戳由传感器记录。 已知的位置指定传感器响应该请求并且触发一个过程来校正其他传感器的时钟偏移。 然后基于时钟偏移校正时间戳。 然后将校正的时间戳发送到用于确定标签位置的位置处理器。

    Contention Based Uplink Orthogonal Frequency-Division Multiple Access (OFDMA)
    14.
    发明申请
    Contention Based Uplink Orthogonal Frequency-Division Multiple Access (OFDMA) 有权
    基于竞争的上行正交频分多址（OFDMA）

    公开(公告)号：US20160128102A1

    公开(公告)日：2016-05-05

    申请号：US14925891

    申请日：2015-10-28

    Applicant: MEDIATEK INC.

    Inventor： Yuh-Ren Jauh ,  Ching-Hwa Yu ,  James June-Ming Wang ,  Chao-Chun Wang

    IPC: H04W74/08

    CPC classification number: H04W74/0833 ,  H04L1/1607 ,  H04L5/0007 ,  H04W72/02 ,  H04W72/042

    Abstract: A method of performing contention-based uplink OFDMA transmission is proposed in accordance with one novel aspect. A wireless communications station (an AP) reserves both dedicated resource and contention resource for uplink OFDMA operation for a list of communications devices (STAs). For contention-based random access, the AP does not need to collect traffic requests from the STAs. The AP only needs to make simple resource arrangement. The AP only needs to specify the allocated resource for random access and the uplink OFDMA operation duration and timing for each uplink OFDMA packet. Each STA having traffic request will contend the resource based on a random access probability scheme.

    Abstract translation: 根据一个新颖的方面提出了执行基于竞争的上行链路OFDMA传输的方法。 无线通信站（AP）为通信设备（STA）列表的上行链路OFDMA操作保留专用资源和争用资源。 对于基于竞争的随机访问，AP不需要从STA收集流量请求。 AP只需要简单的资源安排。 AP仅需要为每个上行OFDMA分组指定分配的随机接入资源和上行OFDMA操作持续时间和定时。 具有业务请求的每个STA将基于随机接入概率方案来对资源进行竞争。

    Method to Improve Channel Access Opportunity in a Wireless Communications System
    15.
    发明申请
    Method to Improve Channel Access Opportunity in a Wireless Communications System 审中-公开
    改善无线通信系统中频道接入机会的方法

    公开(公告)号：US20160050691A1

    公开(公告)日：2016-02-18

    申请号：US14824393

    申请日：2015-08-12

    Applicant: MEDIATEK INC.

    Inventor： Yuh-Ren Jauh ,  James June-Ming Wang ,  Chao-Chun Wang ,  Ching-Hwa Yu ,  Jianhan Liu

    IPC: H04W74/08 ,  H04W48/08 ,  H04L12/26

    CPC classification number: H04W74/0808 ,  H04W84/12

    Abstract: Methods and apparatus are provided for clear channel assessment in the Wifi network. In one novel aspect, different clear channel assessment (CCA) threshold value is set for intra-BSS and inter-BSS frames during the counting down process. A CCA procedure senses the radio channel and determines if the radio channel is busy or idle during the backoff period by comparing the signal level value of detected fames with the CCA threshold value. The counting down will be suspended if the radio channel determined to be busy. If the detected frame is inter-BSS frame, the CCA threshold value is raised. If the signal level of the detected frames is lower than the inter-BSS CCA threshold for inter-BSS fames, the radio channel is considered idle. The counting down process is resumed.

    Abstract translation: 提供方法和设备，用于在Wifi网络中进行清晰的信道评估。 在一个新颖的方面，在倒计时过程中为BSS内和BSS间帧设置不同的清除信道评估（CCA）阈值。 CCA过程检测无线电信道并且通过将检测到的信使的信号电平值与CCA阈值进行比较来确定在退避周期期间无线电信道是忙还是空闲。 无线电频道确定为忙时，倒计时将被暂停。 如果检测到的帧是BSS间帧，则CCA阈值增加。 如果所检测到的帧的信号电平低于用于BSS间信标的BSS间CCA阈值，则无线电信道被认为是空闲的。 倒计时过程恢复。

    Device and method of setting clear channel assessment threshold
    16.
    发明授权
    Device and method of setting clear channel assessment threshold 有权

    公开(公告)号：US10206227B2

    公开(公告)日：2019-02-12

    申请号：US15273017

    申请日：2016-09-22

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang

    IPC: H04W74/08 ,  H04W24/08 ,  H04W84/12

    Abstract: Aspects of the disclosure include a device that operates within a network service set. The device includes a transceiver configured to receive signals in a primary channel and in a secondary channel and a processing circuit. The processing circuit is configured to store a first clear channel assessment (CCA) threshold associated with signals from outside the network service set that are decodable by the device (OBSS_PD level), set a secondary channel CCA threshold to be equal to a level based on the OBSS_PD level, the secondary channel CCA threshold being associated with signals in a secondary channel, and determine whether a reception power level of a received secondary channel signal exceeds the secondary channel CCA threshold.

    MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) OPERATION AND USER SELECTION
    19.
    发明申请
    MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) OPERATION AND USER SELECTION 审中-公开

    公开(公告)号：US20170317727A1

    公开(公告)日：2017-11-02

    申请号：US15499730

    申请日：2017-04-27

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Jianhan Liu

    IPC: H04B7/0452 ,  H04B7/06

    CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0626

    Abstract: System and method of Multi-User Multiple-Input Multiple-Output (MU-MIMO) Beamforming communication. An MU-MIMO BF training session is used to train all the responders in a user group in relation to an initiator having multiple antenna arrays. Accordingly, suitable TX-RX sector pairs are selected based on the training results, and the user group is arranged into subsets such that the initiator can transmit data to the responders in one subset simultaneously by using mutually orthogonal BF waveforms. Prior to the MU-MIMO BF training session, the initiator can select TX sectors of the TX antennas and responders for the training session based on results from a prior or preliminary SISO BF training.

    DIRECTION FINDING AND FTM POSITIONING IN WIRELESS LOCAL AREA NETWORKS
    20.
    发明申请
    DIRECTION FINDING AND FTM POSITIONING IN WIRELESS LOCAL AREA NETWORKS 审中-公开
    无线局域网中的方向寻找和FTM定位

    公开(公告)号：US20160366548A1

    公开(公告)日：2016-12-15

    申请号：US15121049

    申请日：2015-02-24

    Applicant: James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare Jr. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu ,  MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare, JR. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu

    IPC: H04W4/02 ,  G01S5/02 ,  H04W24/10 ,  G01S5/06 ,  H04B17/318 ,  H04L5/00

    Abstract: A method of combined direction finding (DF) and fine timing measurement (FTM) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device (AP) can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas, which allows a receiving device (STA) to resolve multiple DF sounding signals transmitted from the multiple antennas and thereby estimating angle of departure (AoD). On the other hand, the AP can estimate angle of arrival (AoA) from radio signals transmitted from the STA. When the radial resolution error of AoD or AoA positioning increases, DF positioning and fine-timing measurement (FTM) ranging can be jointly applied to reduce the radial resolution error and extends the AoD/AoA service area with positing accuracy.

    Abstract translation: 提出了一种在无线定位区域网络（WLAN）中组合方向搜索（DF）和精确定时测量（FTM）定位的方法。 多天线IEEE 802.11发射设备（AP）可以在来自多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备（STA）解析从多个天线发送的多个DF探测信号 从而估计出发角度（AoD）。 另一方面，AP可以从STA发送的无线电信号估计到达角（AoA）。 当AoD或AoA定位的径向分辨率误差增大时，可以共同应用DF定位和精确定时测量（FTM）测距，以减小径向分辨率误差，并以准确的精度扩展AoD / AoA服务区域。

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