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    • 7. 发明授权
    • Spectrum sharing in a wireless communication network
    • 无线通信网络中的频谱共享
    • US07813315B2
    • 2010-10-12
    • US11702397
    • 2007-02-05
    • Joseph R. ClevelandFarooq KhanEran PisekWilliam J. Semper
    • Joseph R. ClevelandFarooq KhanEran PisekWilliam J. Semper
    • H04W4/00
    • H04W16/14H04L5/023H04W8/005
    • A system and method for synchronous spectrum sharing for use in a wireless communication system based on orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) signaling is disclosed. The system includes a frame detector configured to detect a frame of a broadcast waveform and extract sub-carrier information from a subframe or Secondary User Map (SU MAP). SU MAP includes information on usable sub-carrier and pilot sub-carriers for secondary users. The system allows transmitting data from the secondary user node in unused sub-carriers thereby making efficient use of unused or idle spectrum. Accordingly, secondary users of wireless communication systems can dynamically form ad-hoc mesh network communications in fixed or mobile scenarios.
    • 公开了一种用于基于正交频分复用(OFDM)或正交频分多址(OFDMA)信令的无线通信系统中的同步频谱共享的系统和方法。 该系统包括帧检测器,其被配置为检测广播波形的帧并从子帧或次用户映射(SU MAP)提取副载波信息。 SU MAP包括关于次要用户的可用子载波和导频子载波的信息。 该系统允许从未使用的子载波中的次用户节点发送数据,从而有效利用未使用或空闲频谱。 因此,无线通信系统的次要用户可以在固定或移动场景中动态地形成ad-hoc网状网络通信。
    • 9. 发明申请
    • Spectrum sharing in a wireless communication network
    • 无线通信网络中的频谱共享
    • US20080112359A1
    • 2008-05-15
    • US11702397
    • 2007-02-05
    • Joseph R ClevelandFarooq KhanEran PisekWilliam J. Semper
    • Joseph R ClevelandFarooq KhanEran PisekWilliam J. Semper
    • H04Q7/00
    • H04W16/14H04L5/023H04W8/005
    • A system and method for synchronous spectrum sharing for use in a wireless communication system based on orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) signaling is disclosed. The system includes a frame detector configured to detect a frame of a broadcast waveform and extract sub-carrier information from a subframe or Secondary User Map (SU MAP). SU MAP includes information on usable sub-carrier and pilot sub-carriers for secondary users. The system allows transmitting data from the secondary user node in unused sub-carriers thereby making efficient use of unused or idle spectrum. Accordingly, secondary users of wireless communication systems can dynamically form ad-hoc mesh network communications in fixed or mobile scenarios.
    • 公开了一种用于基于正交频分复用(OFDM)或正交频分多址(OFDMA)信令的无线通信系统中的同步频谱共享的系统和方法。 该系统包括帧检测器,其被配置为检测广播波形的帧并从子帧或次用户映射(SU MAP)提取副载波信息。 SU MAP包括关于次要用户的可用子载波和导频子载波的信息。 该系统允许从未使用的子载波中的次用户节点发送数据,从而有效利用未使用或空闲频谱。 因此,无线通信系统的次要用户可以在固定或移动场景中动态地形成ad-hoc网状网络通信。
    • 10. 发明申请
    • OPTICAL CLOCK RATE NEGOTIATION FOR SUPPORTING ASYMMETRIC CLOCK RATES FOR VISIBLE LIGHT COMMUNICATION
    • 用于支持可见光通信的不对称时钟频率的光时钟速率协商
    • US20110164881A1
    • 2011-07-07
    • US12975225
    • 2010-12-21
    • Sridhar RajagopalEran PisekFarooq KhanYing Li
    • Sridhar RajagopalEran PisekFarooq KhanYing Li
    • H04B10/00
    • H04B10/116H04B10/1149
    • A method and apparatus conduct an optical clock rate negotiation to support asymmetric clock rates for visible light communication (VLC) in a VLC device. A first frame that includes a receiver clock rate supported by a first VLC device is transmitted at a predetermined clock rate. A response frame that includes a receiver clock rate supported by a second VLC device is received from the second VLC device. A transmission clock rate of the first VLC device is selected based on the response frame from the second VLC device. Subsequent frames for data communication are transmitted to the second VLC device at the selected transmission clock rate of the first device. Alternatively, when conducting optical clock negotiation in the PHY layer, multiple clock rates are supported within a single frame.
    • 一种方法和装置进行光时钟速率协商以支持VLC设备中可见光通信(VLC)的非对称时钟速率。 以预定的时钟速率发送包括由第一VLC设备支持的接收机时钟速率的第一帧。 从第二VLC设备接收包括由第二VLC设备支持的接收机时钟速率的响应帧。 基于来自第二VLC设备的响应帧来选择第一VLC设备的传输时钟速率。 用于数据通信的后续帧以所选择的第一设备的传输时钟速率发送到第二VLC设备。 或者,当在PHY层中进行光时钟协商时,在单个帧内支持多个时钟速率。