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    • 67. 发明授权
    • Arrangement for synchronizing access points in WLAN using direct-sequence spread spectrum signaling
    • 使用直接序列扩频信令在WLAN中同步接入点的布置
    • US07656855B2
    • 2010-02-02
    • US11505553
    • 2006-08-16
    • Saeed S. GhassemzadehRobert Raymond Miller, IIJohn F. Murray
    • Saeed S. GhassemzadehRobert Raymond Miller, IIJohn F. Murray
    • H04J3/06
    • H04W56/001H04B1/7073H04B1/7075H04J3/0602H04J3/0611H04J3/0658H04L7/0008H04W84/12H04W88/08
    • An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes a Power over Ethernet (PoE) cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal that is coupled onto the twisted pair used to provide the low voltage PoE signal to various powered devices. At each access point, a filter is used to remove the synchronization signal from the PoE transport, allowing for the group of access points to share a common beacon signal and allow for frequency re-use among the access points. The DS-SS signal is preferable created by a combination of a baseband signal and a set of separate pseudo noise (PN) sequences defining a precision phase (“pilot tone”) signal, a time mark (superframe/beacon) signal, and a time-of-day (real-time clock) signal.
    • 用于在无线LAN内的多个重叠区域接入点之间提供同步的装置利用以太网供电(PoE)电缆连接来将集中式集线器/交换机的同步信号传送到连接到电缆的每个接入点。 同步信号采用直接序列扩频(DS-SS)信号的形式,其被耦合到双绞线上,用于向各种供电设备提供低电压PoE信号。 在每个接入点,使用滤波器从PoE传输中去除同步信号,允许接入点组共享公共信标信号,并允许接入点之间的频率重新使用。 DS-SS信号优选地由基带信号和定义精密相位(“导频”)信号,时间标记(超帧/信标)信号和时间标记(超帧/信标))信号的单独伪噪声(PN)序列的组合组成 时间(实时时钟)信号。
    • 69. 发明授权
    • Spectrum management system for municipal spectrum using guided cognitive radio
    • 使用指导认知无线电的市政频谱频谱管理系统
    • US07627326B1
    • 2009-12-01
    • US11250988
    • 2005-10-14
    • Robert Raymond Miller, II
    • Robert Raymond Miller, II
    • H04W72/00
    • H04W24/00H04W28/16H04W72/0453
    • Described is a system and method for assigning a frequency to an access point in a wireless network comprising a plurality of access points. The system and method includes accessing a rule-base to obtain a set of rules for the wireless network, accessing a license database to obtain information about relevant wireless nodes in a region, creating a list of possible primary node frequencies from a list of frequencies associated with primary wireless nodes in the license database, creating a list of possible secondary node frequencies from a list of frequencies associated with secondary wireless nodes in the license database, identifying a list of clear frequencies from a set of unused frequencies, selecting a frequency from frequencies in the lists of possible primary node frequencies, possible secondary node frequencies, and clear frequencies and registering the frequency in the license database.
    • 描述了一种用于将频率分配给包括多个接入点的无线网络中的接入点的系统和方法。 该系统和方法包括访问规则库以获得无线网络的一组规则,访问许可证数据库以获得关于区域中的相关无线节点的信息,从相关联的频率列表创建可能的主节点频率的列表 在许可证数据库中具有主要无线节点,从许可证数据库中与辅助无线节点相关联的频率列表中创建可能的次要节点频率的列表,从一组未使用的频率识别清除频率的列表,从频率中选择频率 在可能的主节点频率,可能的次节点频率和清除频率的列表中,并将许可证数据库中的频率注册。