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    SYSTEMS AND METHODS FOR AVOIDING HIDDEN NODE COLLISIONS
    2.
    发明申请
    SYSTEMS AND METHODS FOR AVOIDING HIDDEN NODE COLLISIONS 审中-公开

    公开(公告)号：US20170290058A1

    公开(公告)日：2017-10-05

    申请号：US15088718

    申请日：2016-04-01

    申请人： Sarabjot Singh ,  Ping Wang ,  Shu-Ping Yeh ,  Feng Xue ,  Yang-Seok Choi

    发明人： Sarabjot Singh ,  Ping Wang ,  Shu-Ping Yeh ,  Feng Xue ,  Yang-Seok Choi

    IPC分类号： H04W74/08

    CPC分类号： H04W74/0816

    摘要： Disclosed herein are systems and methods that are directed to alleviating the hidden node problem occurring in wireless systems by using the simultaneous transmission and reception (STR) capability without increasing the medium access layer (MAC) overhead. Accordingly, a receiving device receiving a data packet from a transmitting device can simultaneously transmit a data packet, called a STR Clear to Send (CTS). This STR-CTS can create a guard zone around the receiving device to avoid collisions from unwanted transmissions from secondary devices, e.g., neighboring STAs and/or APs. In various embodiments, the STR-CTS packet transmitted by the receiving device can be decodable by legacy devices, e.g. legacy STAs and APs, as well as next generation devices, for example, those employing unlicensed technologies such as LAA.

    Dual Mode System for Wireless Communication
    6.
    发明申请
    Dual Mode System for Wireless Communication 审中-公开
    无线通信双模系统

    公开(公告)号：US20140004861A1

    公开(公告)日：2014-01-02

    申请号：US13992824

    申请日：2012-03-29

    申请人： Yang-Seok Choi

    发明人： Yang-Seok Choi

    IPC分类号： H04W36/04

    CPC分类号： H04W36/04 ,  H04W68/12 ,  H04W76/16 ,  H04W88/06

    摘要： A mobile device may establish a first wireless connection to a macro base station providing wide coverage in order to transmit control and/or broadcast channels, and may also establish a second wireless connection to a pico base station providing smaller coverage in order to transmit a high bandwidth data channel. These wireless connections may enable the mobile device to access a high speed channel within a picocell, while also maintaining continuous and reliable access to control and/or broadcast channels within a macrocell.

    摘要翻译： 移动设备可以建立到提供广泛覆盖的宏基站的第一无线连接，以便发送控制和/或广播信道，并且还可以建立到提供较小覆盖的微微基站的第二无线连接，以便传输高 带宽数据通道。 这些无线连接可以使得移动设备能够访问微微小区内的高速信道，同时还保持对宏小区内的控制和/或广播信道的连续和可靠访问。

    SCHEDULER SYSTEM FOR SIMULTANEOUS TRANSMIT AND RECEIVE
    7.
    发明申请
    SCHEDULER SYSTEM FOR SIMULTANEOUS TRANSMIT AND RECEIVE 审中-公开
    用于同时发送和接收的调度系统

    公开(公告)号：US20130265915A1

    公开(公告)日：2013-10-10

    申请号：US13995161

    申请日：2011-09-30

    申请人： Yang-Seok Choi ,  Xiangying Yang ,  Muthaiah Venkatachalam

    发明人： Yang-Seok Choi ,  Xiangying Yang ,  Muthaiah Venkatachalam

    IPC分类号： H04B1/56

    CPC分类号： H04B1/56 ,  H04W72/12

    摘要： A wireless communication system and method schedules a beginning of an uplink transmission from a wireless device to a network transceiver with a first predetermined period of time after an end of a downlink transmission from the network transceiver device to the wireless device is scheduled. The uplink transmission and the downlink transmission comprise the same carrier frequency. The first predetermined period of time is related to a time required for the wireless device to switch from between receive and transmit modes. A beginning a downlink transmission from the network transceiver to the wireless device is scheduled with a second predetermined period of time after an end of an uplink transmission from the wireless device to the network transceiver is scheduled. The second predetermined period of time is related to a time required for the wireless device to switch between transmit and receive modes.

    摘要翻译： 在从网络收发器设备到无线设备的下行链路传输结束之后，无线通信系统和方法将从无线设备到网络收发器的上行链路传输的开始调度为第一预定时间段。 上行链路传输和下行链路传输包括相同的载波频率。 第一预定时间段与无线设备从接收和发送模式之间切换所需的时间相关。 在从无线设备到网络收发器的上行链路传输结束调度之后，从第二预定时间段调度从网络收发器到无线设备的下行链路传输开始。 第二预定时间段与无线设备在发射和接收模式之间切换所需的时间有关。

    Techniques for femto cell synchronization in wireless networks
    8.
    发明授权
    Techniques for femto cell synchronization in wireless networks 有权
    无线网络中毫微微小区同步的技术

    公开(公告)号：US08396050B2

    公开(公告)日：2013-03-12

    申请号：US12653816

    申请日：2009-12-21

    申请人： Xiangying Yang ,  Muthaiah Muthu Venkatachalam ,  Yang-Seok Choi

    发明人： Xiangying Yang ,  Muthaiah Muthu Venkatachalam ,  Yang-Seok Choi

    IPC分类号： H04J3/06 ,  H04B15/00

    CPC分类号： H04W56/001 ,  H04W76/38 ,  H04W84/045

    摘要： Techniques are disclosed that provide for femto base stations to become synchronized with other base stations in a wireless network. For instance, a macro base station may instruct a mobile station to engage in a synchronization operation that synchronizes one or more timings (e.g., OFDM timings) of a femto base station with one or more corresponding timings of the macro base station. This may involve the mobile station having timing references of the macro base station. Further, this may involve the mobile station performing scanning operations and/or handover ranging operations with the femto base station. The mobile device may determine timing offsets between the femto BS and the macro BS. These offsets may be sent to the macro base station or to the femto base station. Also, the femto base station may adopt timings employed by the mobile station. The macro base station or a femto base station may direct a femto base station to achieve synchronization either directly with timing adjustment offset, or with a list of already synchronized femto base station as synchronization reference.

    摘要翻译： 公开了提供毫微微基站与无线网络中的其他基站同步的技术。 例如，宏基站可以指示移动台进行将毫微微基站的一个或多个定时（例如，OFDM定时）与宏基站的一个或多个对应定时同步的同步操作。 这可能涉及具有宏基站的定时参考的移动站。 此外，这可能涉及移动台与毫微微基站执行扫描操作和/或切换测距操作。 移动设备可以确定毫微微BS与宏BS之间的定时偏移。 这些偏移可以被发送到宏基站或毫微微基站。 此外，毫微微基站可以采用移动台采用的定时。 宏基站或毫微微基站可以指示毫微微基站直接与定时调整偏移或者与作为同步参考的已经同步的毫微微基站的列表实现同步。