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    Managing transmit power for better frequency re-use in TV white space
    61.
    发明授权
    Managing transmit power for better frequency re-use in TV white space 有权
    管理传输功率，以便更好地在电视空白区域重新使用频率

    公开(公告)号：US09585025B2

    公开(公告)日：2017-02-28

    申请号：US13397473

    申请日：2012-02-15

    Applicant: Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    Inventor： Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Rahul Tandra

    IPC: H04W16/14 ,  H04W52/32 ,  H04W52/36 ,  H04W48/12 ,  H04W52/24 ,  H04W74/08

    CPC classification number: H04W16/14 ,  H04W48/12 ,  H04W52/242 ,  H04W52/246 ,  H04W52/325 ,  H04W52/367 ,  H04W74/0808

    Abstract: Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. By managing transmit power as described herein, medium re-use may be improved in such a network, and unfair usage problems may be alleviated. One example method generally includes receiving, from an apparatus, a message with an indication of a highest transmit power used by the apparatus for transmitting data frames; and determining that the apparatus is a dominant interferer based, at least in part, on the highest transmit power. Another example method generally includes receiving, from an apparatus, a control or management message with a first indication of a first transmit power used by the apparatus for transmitting data frames; and determining that the apparatus is a dominant interferer based, at least in part, on the first transmit power.

    Abstract translation: 本公开的某些方面提供了用于管理电视空白（TVWS）网络中的发射功率的技术和装置。 通过如本文所述管理发送功率，可以在这样的网络中改善中等重复使用，并且可以减轻不公平的使用问题。 一个示例性方法通常包括从设备接收具有由用于发送数据帧的设备使用的最高发射功率的指示的消息; 以及至少部分地基于最高发射功率确定所述装置是主要干扰源。 另一示例性方法通常包括从装置接收控制或管理消息，其具有用于发送数据帧的装置所使用的第一发射功率的第一指示; 以及至少部分地基于所述第一发射功率来确定所述装置是主要干扰源。

    Variable-length cyclic prefixes in OFDM coaxial communications
    64.
    发明授权
    Variable-length cyclic prefixes in OFDM coaxial communications 有权
    OFDM同轴通信中的可变长度循环前缀

    公开(公告)号：US08867638B2

    公开(公告)日：2014-10-21

    申请号：US13610745

    申请日：2012-09-11

    Applicant: Stephen J. Shellhammer

    Inventor： Stephen J. Shellhammer

    IPC: H04K1/10 ,  H04L27/28

    CPC classification number: H04L27/2607

    Abstract: A coax network unit (CNU) is coupled to a coax line terminal (CLT) by a cable plant. In a discovery mode of operation, the CNU receives from the CLT one or more message packets that include one or more orthogonal frequency-division multiplexing (OFDM) symbols with cyclic prefixes of a first length. In a normal mode of operation subsequent to the discovery mode, the CNU receives data packets comprising OFDM symbols from the CLT. The OFDM symbols of the received data packets have cyclic prefixes of a second length that is less than the first length.

    Abstract translation: 同轴电缆网络单元（CNU）通过电缆设备耦合到同轴线路终端（CLT）。 在发现操作模式中，CNU从CLT接收包括具有第一长度的循环前缀的一个或多个正交频分复用（OFDM）符号的一个或多个消息分组。 在发现模式之后的正常操作模式中，CNU从CLT接收包括OFDM符号的数据分组。 所接收的数据分组的OFDM符号具有小于第一长度的第二长度的循环前缀。

    Preamble design for television white space transmissions
    65.
    发明授权
    Preamble design for television white space transmissions 有权
    电视空白传输的序言设计

    公开(公告)号：US08830815B2

    公开(公告)日：2014-09-09

    申请号：US13471947

    申请日：2012-05-15

    Applicant: Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    Inventor： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    IPC: H04J11/00 ,  H04L5/00 ,  H04L29/06 ,  H04L27/26 ,  H04W4/00

    CPC classification number: H04L69/00 ,  H04L5/0053 ,  H04L27/2602 ,  H04W4/00

    Abstract: A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    Abstract translation: 提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    Distributed prioritized contention for spectrum sharing
    66.
    发明授权
    Distributed prioritized contention for spectrum sharing 有权
    分布式优先级争用频谱共享

    公开(公告)号：US08675623B2

    公开(公告)日：2014-03-18

    申请号：US12688740

    申请日：2010-01-15

    Applicant: Ahmed K. Sadek ,  Stephen J. Shellhammer

    Inventor： Ahmed K. Sadek ,  Stephen J. Shellhammer

    IPC: H04W4/00 ,  H04L12/413 ,  H04J3/02

    CPC classification number: H04L5/0033 ,  H04L5/0035 ,  H04W16/14 ,  H04W74/085

    Abstract: Techniques for use in contending for a portion of a television channel spectrum are disclosed. In some instances, a back-off value is used to decide whether a contender's contention number will be transmitted when the contention channel is free, and the back-off value is determined based on the contention number. In some instances, a contender monitors the contention channel and withdraws from contention if it detects from the contention channel that a higher priority contender is in contention.

    Abstract translation: 公开了用于竞争电视频道频谱的一部分的技术。 在某些情况下，使用退避值来决定竞争者的竞争号码是否在竞争信道是空闲时被发送，并且基于竞争号确定退避价值。 在某些情况下，如果竞争者从争用频道中检测到较高优​​先级的竞争者在争夺中，则竞争者监视争用通道并退出争用。

    Methods and apparatus for providing a wireless expansion network
    67.
    发明授权
    Methods and apparatus for providing a wireless expansion network 有权
    用于提供无线扩展网络的方法和装置

    公开(公告)号：US08577377B2

    公开(公告)日：2013-11-05

    申请号：US12357797

    申请日：2009-01-22

    Applicant: Stephen J. Shellhammer ,  Ahmed K. Sadek ,  Cong T. Nguyen

    Inventor： Stephen J. Shellhammer ,  Ahmed K. Sadek ,  Cong T. Nguyen

    IPC: H04W36/00

    CPC classification number: H04W36/385

    Abstract: Methods and apparatus for providing a wireless expansion network. In an aspect, an apparatus includes an expansion circuit configured to identify at least one of a selected uplink (UL) channel and a selected downlink (DL) channel that are provided by one of a primary network and an expansion network, and a processing circuit configured to switch to the at least one of the selected UL and DL channels. An apparatus includes means for obtaining link parameters associated with a primary network and an expansion network, means for identifying clients that are assigned transmission channels on both the primary network and the expansion network based on the link parameters, and means for transmitting messages to the clients to indicate the assigned transmission channels.

    Abstract translation: 用于提供无线扩展网络的方法和装置。 一方面，一种装置包括：扩展电路，被配置为识别由主网络和扩展网络中的一个提供的所选择的上行链路（UL）信道和选择的下行链路（DL）信道中的至少一个，以及处理电路 被配置为切换到所选择的UL和DL信道中的至少一个。 一种装置包括用于获得与主网络和扩展网络相关联的链路参数的装置，用于基于所述链路参数识别在主网络和扩展网络上分配了传输信道的客户端的装置，以及用于向客户端发送消息的装置 以指示分配的传输信道。

    METHODS AND SYSTEMS FOR ALLOCATING RESOURCES IN A NETWORK WITH OPTICAL AND COAXIAL COMPONENTS
    68.
    发明申请
    METHODS AND SYSTEMS FOR ALLOCATING RESOURCES IN A NETWORK WITH OPTICAL AND COAXIAL COMPONENTS 有权
    用于在光网络和同轴组件网络中分配资源的方法和系统

    公开(公告)号：US20130239165A1

    公开(公告)日：2013-09-12

    申请号：US13609198

    申请日：2012-09-10

    Applicant: Andrea GARAVAGLIA ,  Juan MONTOJO ,  Christian PIETSCH ,  Stephen J. SHELLHAMMER ,  Nicola VARANESE

    Inventor： Andrea GARAVAGLIA ,  Juan MONTOJO ,  Christian PIETSCH ,  Stephen J. SHELLHAMMER ,  Nicola VARANESE

    IPC: H04N21/61

    CPC classification number: H04N21/61 ,  H04Q11/0067 ,  H04Q11/0071 ,  H04Q2011/0064 ,  H04Q2011/0079

    Abstract: A media converter is to be coupled to an optical line terminal via an optical link and to a plurality of coax network units via coax links in a cable plant. The media converter includes an optical physical-layer device to receive and transmit optical signals via the optical link and a coax physical-layer device to receive and transmit electrical signals via the coax links. The media converter also includes an implementation of an optical-coax convergence layer to schedule transmissions of electrical signals from the plurality of coax network units by allocating coax resources among the plurality of coax network units in accordance with resource allocation for the optical link.

    Abstract translation: 媒体转换器将经由光链路耦合到光线路终端，并通过电缆设备中的同轴电缆连接到多个同轴电缆网络单元。 媒体转换器包括用于经由光链路接收和发送光信号的光物理层设备和同轴电缆物理层设备，以经由同轴电缆链路接收和发送电信号。 媒体转换器还包括光同轴会聚层的实现，以根据光链路的资源分配来分配多个同轴电缆网络单元之间的同轴电缆资源来调度来自多个同轴电缆网络单元的电信号的传输。

    Methods and apparatus for spectrum sensing of signal features in a wireless channel
    70.
    发明授权
    Methods and apparatus for spectrum sensing of signal features in a wireless channel 有权
    用于无线信道中信号特征的频谱感测的方法和装置

    公开(公告)号：US08463195B2

    公开(公告)日：2013-06-11

    申请号：US12618533

    申请日：2009-11-13

    Applicant: Stephen J. Shellhammer

    Inventor： Stephen J. Shellhammer

    IPC: H04B17/00

    CPC classification number: H04W16/14 ,  H04B7/0837 ,  H04B17/26 ,  H04B17/382 ,  H04W72/085

    Abstract: Methods and apparatus for sensing features of a signal in a wireless communication system are disclosed. The disclosed methods and apparatus sense signal features by determining a number of spectral density estimates, where each estimate is derived based on reception of the signal by a respective antenna in a system with multiple sensing antennas. The spectral density estimates are then combined, and the signal features are sensed based on the combination of the spectral density estimates.

    Abstract translation: 公开了用于感测无线通信系统中的信号特征的方法和装置。 所公开的方法和装置通过确定频谱密度估计的数量来感测信号特征，其中每个估计是基于在具有多个感测天线的系统中的相应天线的信号的接收而导出的。 然后组合谱密度估计，并且基于频谱密度估计的组合来感测信号特征。

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