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    • 2. 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
    • US08571072B2
    • 2013-10-29
    • US12636866
    • 2009-12-14
    • 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。
    • 5. 发明申请
    • Managing Presence in Communications Systems
    • 通信系统管理
    • US20120066463A1
    • 2012-03-15
    • US12882309
    • 2010-09-15
    • Christopher W. RiceRittwik JanaJohn F. MurrayRon Shacham
    • Christopher W. RiceRittwik JanaJohn F. MurrayRon Shacham
    • G06F12/16
    • H04L67/141G06F11/3006G06F11/3082G06N7/005H04L67/24H04L67/2823H04L67/306
    • Raw presence data from a plurality of presence data sources is collected and processed into unified presence data. Unified presence data over a period of time before a first time is stored in a historical presence data archive. A probability of a presence variable having a specific value is generated based on unified presence data collected and processed at a second time on or after the first time, the historical presence data archive, and user profile data. Presence information is generated based on the probability and the user profile data. Presence data sources include both Session Initiation Protocol based and non Session Initiation Protocol based presence data sources. In an embodiment, non Session Initiation Protocol based unified presence data is transformed into Session Initiation Protocol based unified presence data.
    • 来自多个存在数据源的原始存在数据被收集并处理成统一存在数据。 在第一次之前的一段时间内的统一呈现数据被存储在历史存在数据档案中。 基于在第一时间或之后的第二时间收集和处理的统一存在数据,历史存在数据存档和用户简档数据,生成具有特定值的存在变量的概率。 基于概率和用户简档数据生成存在信息。 存在数据源包括基于会话发起协议和不基于会话发起协议的在线数据源。 在一个实施例中,基于非会话发起协议的统一存在数据被转换为基于会话发起协议的统一存在数据。
    • 9. 发明授权
    • Intra-premises wireless broadband service using lumped and distributed wireless radiation from cable source input
    • 室内无线宽带服务使用来自电缆源输入的集中和分布式无线辐射
    • US07865134B2
    • 2011-01-04
    • US12647585
    • 2009-12-28
    • John F. MurrayChristopher W. RiceHarry R. Worstell
    • John F. MurrayChristopher W. RiceHarry R. Worstell
    • H04H1/00
    • H04N21/2143H04B7/15H04L12/2801H04L12/2803H04L12/2838H04N7/104H04N21/42676
    • A premises, connected to receive broadband service(s) and also connected to a cable system, is provided with a broadband interface which connects to in-premises cabling which is coupled to consumer receivers such as a television sets, PDAs, laptops. Connected to the broadband interface is an adjunct device which channels broadband, data and voice signals supplied to an in-premises wireless system as distinguished from the signals supplied to the cable connected consumer receivers. The adjunct device formats the broadband and voice signals or any broadband service into packet format suitable for signal radiation and couples them to the in-premises coax cabling, via a diplexer, at a first selected location. At a second cable location a second diplexer, connected to the cable, separates the broadband, data and voice signals and couples them to a signal radiation device (i.e., an RF antenna or leaky coaxial cable) which radiates the signal to the immediate surrounding location. Various devices, near to the second cable location for specific services, receive the wireless signals (i.e., broadband, data and voice) from the radiating antenna.
    • 连接到接收宽带服务并且还连接到有线系统的场所被提供有宽带接口,其连接到诸如电视机,PDA,笔记本电脑的消费者接收器的室内电缆。 连接到宽带接口是一种辅助设备,其将提供给室内无线系统的宽带,数据和语音信号与提供给电缆连接的消费者接收器的信号区分开来。 辅助设备将宽带和语音信号或任何宽带服务格式化成适合于信号辐射的分组格式,并且通过双工器在第一选定位置将它们耦合到本地同轴电缆。 在第二电缆位置,连接到电缆的第二双工器分离宽带,数据和语音信号,并将它们耦合到信号辐射装置(即,RF天线或泄漏同轴电缆),该信号辐射装置将信号辐射到直接周围位置 。 靠近用于特定业务的第二电缆位置的各种设备从辐射天线接收无线信号(即,宽带,数据和语音)。