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    DIRECTION FINDING AND FTM POSITIONING IN WIRELESS LOCAL AREA NETWORKS
    1.
    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

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

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

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

    摘要： 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.

    摘要翻译： 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。

    METHOD OF CHANNEL ACCESS CONTROL IN WIRELESS LOCAL AREA NETWORKS
    4.
    发明申请
    METHOD OF CHANNEL ACCESS CONTROL IN WIRELESS LOCAL AREA NETWORKS 审中-公开
    无线局域网通道接入控制方法

    公开(公告)号：US20160174253A1

    公开(公告)日：2016-06-16

    申请号：US14903596

    申请日：2014-07-13

    申请人： Jianhan LIU ,  James June-Ming WANG ,  Thomas Edward PARE, JR. ,  Yung-Ping HSU ,  MEDIATEK SINGAPORE PTE. LTD.

    发明人： Jianhan Liu ,  James June-Ming Wang ,  Thomas Edward Pare, JR. ,  Yung-Ping Hsu

    IPC分类号： H04W74/00 ,  H04W24/08

    CPC分类号： H04W74/002 ,  H04W24/02 ,  H04W24/08 ,  H04W48/08 ,  H04W74/006 ,  H04W84/12

    摘要： A method to improve the area throughput of dense wireless local area networks (WLAN) by channel access control is proposed. The method allows an access point to obtain information of a plurality of stations within the wireless network. The access point classifies the plurality of stations into at least one group of stations and assigns a group identification (ID) according to the obtained information. The group ID and channel access control parameters are sent to the stations that are classified into the certain group. The stations in each of the group use the received channel access control parameters to communicate with the access point.

    摘要翻译： 提出了一种通过信道访问控制来提高密集无线局域网（WLAN）面积吞吐量的方法。 该方法允许接入点获得无线网络内的多个站的信息。 接入点将多个站分类为至少一组站，并根据获得的信息分配组标识（ID）。 组ID和通道访问控制参数被发送到分类到特定组的站。 每个组中的站使用接收到的信道访问控制参数与接入点进行通信。

    Methods for inter-user interference indication feedback and usage in MU-MIMO wireless systems
    5.
    发明授权
    Methods for inter-user interference indication feedback and usage in MU-MIMO wireless systems 有权
    MU-MIMO无线系统中用户间干扰指示反馈和使用的方法

    公开(公告)号：US08902921B2

    公开(公告)日：2014-12-02

    申请号：US13587902

    申请日：2012-08-16

    申请人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

    发明人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

    IPC分类号： H04B7/212 ,  H04B7/04 ,  H04L25/02

    CPC分类号： H04B7/0452 ,  H04L25/0204 ,  H04L25/0224

    摘要： The present invention proposes methods for facilitating and improving the performance of MU-MIMO transmission in wireless communication systems. Each user within a MU group inserts an inter-user interference indication field in its acknowledgement packet. The inter-user interference indication field includes signal-to-interference-noise-ratio (SINR) and interference source information. The MU-MIMO transmitter extracts inter-user interference indication feedback and improves subsequent MU-MIMO transmission. Feedback of the inter-user interference information such as SINR and interference source allows efficient link adaptation, smarter user selection, channel re-sounding selection, and fine-tuning of precoding matrix.

    摘要翻译： 本发明提出了促进和改进无线通信系统中MU-MIMO传输性能的方法。 MU组内的每个用户在其确认分组中插入用户间干扰指示字段。 用户间干扰指示字段包括信号与干扰噪声比（SINR）和干扰源信息。 MU-MIMO发射机提取用户间干扰指示反馈并改进随后的MU-MIMO传输。 诸如SINR和干扰源之类的用户间干扰信息的反馈允许有效的链路自适应，更智能的用户选择，信道重新选择以及预编码矩阵的微调。

    Simultaneous Feedback Signaling for Dynamic Bandwidth Selection
    6.
    发明申请
    Simultaneous Feedback Signaling for Dynamic Bandwidth Selection 有权
    用于动态带宽选择的同步反馈信号

    公开(公告)号：US20130010632A1

    公开(公告)日：2013-01-10

    申请号：US13635341

    申请日：2011-10-20

    申请人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

    发明人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

    IPC分类号： H04W24/10

    CPC分类号： H04B17/309 ,  H04B17/24

    摘要： A method of simultaneously providing channel quality feedback information in all valid sub-channels is provided to facilitate and improve the performance of dynamic transmission bandwidth adjustment and fast link adaptation. A receiving device receives a sounding signal over a wide channel in a wireless system. The sounding signal is transmitted from a transmitting device over multiple sub-channels of the wide channel. The receiving device estimates channel quality information based on the sounding signal for each sub-channel. The channel quality information includes estimated average SNR and recommended MCS and other channel quality metrics. The receiving device transmits a feedback message to the transmitting device. The feedback message contains the estimated channel quality information for all valid sub-channels within the transmission bandwidth. The transmitting device performs dynamic transmission bandwidth selection and fast link adaptation based on the channel quality information for all valid sub-channels.

    摘要翻译： 提供了一种在所有有效子信道中同时提供信道质量反馈信息的方法，以促进和改进动态传输带宽调整和快速链路自适应的性能。 接收设备在无线系统中通过宽频道接收探测信号。 探测信号通过宽信道的多个子信道从发送设备发送。 接收装置基于每个子信道的探测信号来估计信道质量信息。 信道质量信息包括估计的平均SNR和推荐的MCS等信道质量度量。 接收装置向发送装置发送反馈消息。 反馈消息包含传输带宽内所有有效子信道的估计信道质量信息。 发送设备根据所有有效子信道的信道质量信息，执行动态传输带宽选择和快速链路自适应。

    Method and system for supporting incompatible channelization of a wireless communications system
    7.
    发明授权
    Method and system for supporting incompatible channelization of a wireless communications system 有权
    支持无线通信系统不兼容信道化的方法和系统

    公开(公告)号：US09572192B2

    公开(公告)日：2017-02-14

    申请号：US13635333

    申请日：2011-10-18

    申请人： Chao-Chun Wang ,  Jianhan Liu ,  Chih-Shi Yee ,  Huanchun Ye ,  James June-Ming Wang

    发明人： Chao-Chun Wang ,  Jianhan Liu ,  Chih-Shi Yee ,  Huanchun Ye ,  James June-Ming Wang

    IPC分类号： H04W76/04 ,  H04W28/18 ,  H04W48/08 ,  H04W72/00 ,  H04W76/02

    CPC分类号： H04W76/20 ,  H04W28/18 ,  H04W48/08 ,  H04W72/00 ,  H04W72/0453 ,  H04W76/10 ,  H04W84/12

    摘要： A method of supporting incompatible channelization in a wireless communications system is provided. A coordinating device determines a first set of physical parameters of a first wireless channel. The first set of physical parameters includes a channel bandwidth, a central frequency, a transmit power limit, and a modulation and coding scheme. The coordinating device establishes communication with a first set of communications devices over the first wireless channel. The coordinating device then broadcasts a channel-adjustment message and determines a protection period. The channel-adjustment message comprises a set of instructions on how to adjust to a second set of physical parameters of a second wireless channel. A second set of communications devices adjust physical parameters based on the channel-adjustment message. Finally, the coordinating device communicates with the second set of communications devices over the second wireless channel during the protection period.

    摘要翻译： 提供了一种在无线通信系统中支持不兼容信道化的方法。 协调装置确定第一无线信道的第一组物理参数。 第一组物理参数包括信道带宽，中心频率，发射功率限制以及调制和编码方案。 协调设备通过第一无线信道与第一组通信设备建立通信。 协调装置然后广播频道调整消息并确定保护期。 信道调整消息包括关于如何调整到第二无线信道的第二组物理参数的一组指令。 第二组通信设备根据信道调整消息调整物理参数。 最后，协调装置在保护期间通过第二无线信道与第二组通信装置进行通信。

    Methods for Inter-User Interference Indication Feedback and Usage in MU-MIMO Wireless Systems
    8.
    发明申请
    Methods for Inter-User Interference Indication Feedback and Usage in MU-MIMO Wireless Systems 有权
    MU-MIMO无线系统中用户间干扰指示反馈和使用的方法

    公开(公告)号：US20130107916A1

    公开(公告)日：2013-05-02

    申请号：US13587902

    申请日：2012-08-16

    申请人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

    发明人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

    IPC分类号： H04B7/04

    CPC分类号： H04B7/0452 ,  H04L25/0204 ,  H04L25/0224

    摘要： The present invention proposes methods for facilitating and improving the performance of MU-MIMO transmission in wireless communication systems. Each user within a MU group inserts an inter-user interference indication field in its acknowledgement packet. The inter-user interference indication field includes signal-to-interference-noise-ratio (SINR) and interference source information. The MU-MIMO transmitter extracts inter-user interference indication feedback and improves subsequent MU-MIMO transmission. Feedback of the inter-user interference information such as SINR and interference source allows efficient link adaptation, smarter user selection, channel re-sounding selection, and fine-tuning of precoding matrix.

    摘要翻译： 本发明提出了促进和改进无线通信系统中MU-MIMO传输性能的方法。 MU组内的每个用户在其确认分组中插入用户间干扰指示字段。 用户间干扰指示字段包括信号与干扰噪声比（SINR）和干扰源信息。 MU-MIMO发射机提取用户间干扰指示反馈并改进随后的MU-MIMO传输。 诸如SINR和干扰源之类的用户间干扰信息的反馈允许有效的链路自适应，更智能的用户选择，信道重新选择以及预编码矩阵的微调。

    Integrity and Quality Monitoring and Signaling for Sounding and Reduced Feedback
    9.
    发明申请
    Integrity and Quality Monitoring and Signaling for Sounding and Reduced Feedback 审中-公开
    完整性和质量监测和信号发声和减少反馈

    公开(公告)号：US20130058239A1

    公开(公告)日：2013-03-07

    申请号：US13635360

    申请日：2011-10-20

    申请人： James June-Ming Wang ,  Jianhan Liu ,  Vishakan Ponnampalam ,  Chao-Chun Wang ,  Huanchun Ye

    发明人： James June-Ming Wang ,  Jianhan Liu ,  Vishakan Ponnampalam ,  Chao-Chun Wang ,  Huanchun Ye

    IPC分类号： H04W24/00

    CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/065 ,  H04B7/0658 ,  H04L1/0026 ,  H04L1/0028 ,  H04L25/0226 ,  H04L25/0228

    摘要： A method of sounding and feedback with channel quality information and reduced overhead is provided. A receiving station receives a sounding signal transmitted from an access point over multiple sub-channels of a wide channel in a wireless network. The receiving station detects channel quality based on the received sounding signal for each sub-channel. The receiving station then performs channel estimation based on the received sounding signal and thereby determining feedback information. Finally, the receiving station transmits a feedback message to the access point, the feedback message contains NULL feedback information, reduced feedback information, or channel integrity/quality indicators based on the channel quality information for each sub-channel. Based on the feedback message, the access point may repeat the sounding process, narrow the transmission bandwidth, or select only stations who have indicated uncorrupted channel sounding for MU-MMO transmission.

    摘要翻译： 提供了一种利用信道质量信息和降低开销的声音和反馈方法。 接收站通过无线网络中的宽信道的多个子信道接收从接入点发送的探测信号。 接收站基于接收到的每个子信道的探测信号来检测信道质量。 然后，接收站基于接收的探测信号进行信道估计，从​​而确定反馈信息。 最后，接收站向接入点发送反馈消息，反馈消息基于每个子信道的信道质量信息包含NULL反馈信息，减少的反馈信息或信道完整性/质量指示符。 基于反馈消息，接入点可以重复发声过程，缩小传输带宽，或仅选择指示MU-MMO传输不通道信道探测的台。

    Simultaneous feedback signaling for dynamic bandwidth selection
    10.
    发明授权
    Simultaneous feedback signaling for dynamic bandwidth selection 有权
    用于动态带宽选择的同步反馈信号

    公开(公告)号：US09258070B2

    公开(公告)日：2016-02-09

    申请号：US13635341

    申请日：2011-10-20

    申请人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

    发明人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

    IPC分类号： H04W4/00 ,  H04B17/309 ,  H04B17/24

    CPC分类号： H04B17/309 ,  H04B17/24

    摘要： A method of simultaneously providing channel quality feedback information in all valid sub-channels is provided to facilitate and improve the performance of dynamic transmission bandwidth adjustment and fast link adaptation. A receiving device receives a sounding signal over a wide channel in a wireless system. The sounding signal is transmitted from a transmitting device over multiple sub-channels of the wide channel. The receiving device estimates channel quality information based on the sounding signal for each sub-channel. The channel quality information includes estimated average SNR and recommended MCS and other channel quality metrics. The receiving device transmits a feedback message to the transmitting device. The feedback message contains the estimated channel quality information for all valid sub-channels within the transmission bandwidth. The transmitting device performs dynamic transmission bandwidth selection and fast link adaptation based on the channel quality information for all valid sub-channels.

    摘要翻译： 提供了一种在所有有效子信道中同时提供信道质量反馈信息的方法，以促进和改进动态传输带宽调整和快速链路自适应的性能。 接收设备在无线系统中通过宽频道接收探测信号。 探测信号通过宽信道的多个子信道从发送设备发送。 接收装置基于每个子信道的探测信号来估计信道质量信息。 信道质量信息包括估计的平均SNR和推荐的MCS等信道质量度量。 接收装置向发送装置发送反馈消息。 反馈消息包含传输带宽内所有有效子信道的估计信道质量信息。 发送设备根据所有有效子信道的信道质量信息，执行动态传输带宽选择和快速链路自适应。