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153 条记录 (耗时 0.036 秒)

    Enabling white space networks independent of low-threshold sensing
    62.
    发明授权
    Enabling white space networks independent of low-threshold sensing 有权
    实现独立于低阈值感测的空白网络

    公开(公告)号：US08473989B2

    公开(公告)日：2013-06-25

    申请号：US12822218

    申请日：2010-06-24

    申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Rohan Narayana Murty

    发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Rohan Narayana Murty

    IPC分类号： H04N7/20

    CPC分类号： H04W48/08 ,  H04L27/0006 ,  H04W16/14 ,  H04W24/00

    摘要： Described is a technology by which a remote or local geo-location service provides white space information that one or more client devices and/or base stations may use to determine which white spaces are available for use, e.g., for wireless networking. Because of the information, low-threshold sensing is not needed by the client devices and/or base stations to know which white spaces are available. The service computes the available white spaces for a given location based upon television transmitter parameters, elevation data, and information received regarding any operational wireless microphones.

    摘要翻译： 描述了一种技术，通过该技术远程或本地地理位置服务提供一个或多个客户端设备和/或基站可以用于确定哪些空格可用于例如无线网络的白空间信息。 由于该信息，客户端设备和/或基站不需要低阈值感测来知道哪些空白可用。 该服务基于电视发射机参数，高程数据和关于任何操作无线麦克风接收到的信息来计算给定位置的可用空白空间。

    Efficient and reliable multicast over a Wi-Fi network
    66.
    发明授权
    Efficient and reliable multicast over a Wi-Fi network 有权
    通过Wi-Fi网络高效可靠的多播

    公开(公告)号：US08411608B2

    公开(公告)日：2013-04-02

    申请号：US12714360

    申请日：2010-02-26

    申请人： Ranveer Chandra ,  Sandeep P. Karanth ,  Thomas Moscibroda ,  Vishnu Navda ,  Jitendra D. Padhye ,  Ramachandran Ramjee ,  Lenin Ravindranath Sivalingam

    发明人： Ranveer Chandra ,  Sandeep P. Karanth ,  Thomas Moscibroda ,  Vishnu Navda ,  Jitendra D. Padhye ,  Ramachandran Ramjee ,  Lenin Ravindranath Sivalingam

    IPC分类号： H04H20/71

    CPC分类号： H04H20/63 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/16 ,  H04L1/1854 ,  H04L2001/0093 ,  H04W8/186 ,  H04W48/20 ,  H04W76/40

    摘要： A “Wi-Fi Multicaster” provides a practical and efficient Wi-Fi multicast system for environments having potentially large numbers of Wi-Fi clients. Significantly, the Wi-Fi Multicaster does not require any changes to the 802.11 protocol, or to the underlying Wi-Fi infrastructure. In various embodiments, the Wi-Fi Multicaster uses pseudo-broadcast, and augments it with destination control, association control and optional proactive FEC (forward error correction) to improve multicast performance. More specifically, the Wi-Fi Multicaster system converts multicast packets to targeted unicast transmissions. To minimize the amount of airtime consumed, the Wi-Fi Multicaster uses destination control in combination with various algorithms for association control. Further, in various embodiments, the Wi-Fi Multicaster includes an adaptive, proactive FEC scheme to reduce overall packet losses. Finally, to overcome the challenges posed by encryption protocols such as 802.1x, the Wi-Fi Multicaster uses a “virtual multicast interface” that allows clients to “share” a common key for each multicast.

    摘要翻译： Wi-Fi Multicaster为具有潜在大量Wi-Fi客户端的环境提供了实用且高效的Wi-Fi组播系统。 重要的是，Wi-Fi Multicaster不需要对802.11协议或底层Wi-Fi基础设施进行任何更改。 在各种实施例中，Wi-Fi Multicaster使用伪广播，并且将其与目的地控制，关联控制和可选的主动FEC（前向纠错）相加以提高多播性能。 更具体地说，Wi-Fi Multicaster系统将多播分组转换为目标单播传输。 为了最大限度地减少消耗的通话时间，Wi-Fi Multicaster将目的地控制与各种算法结合使用，进行关联控制。 此外，在各种实施例中，Wi-Fi多播卡器包括自适应主动FEC方案以减少总体分组丢失。 最后，为了克服802.1x等加密协议带来的挑战，Wi-Fi Multicaster使用虚拟组播接口，允许客户端共享每个组播的公共密钥。

    SHORT-RANGE NODES WITH ADAPTIVE PREAMBLES FOR COEXISTENCE
    67.
    发明申请
    SHORT-RANGE NODES WITH ADAPTIVE PREAMBLES FOR COEXISTENCE 有权
    具有自适应前缀的短距离编号

    公开(公告)号：US20120294232A1

    公开(公告)日：2012-11-22

    申请号：US13111965

    申请日：2011-05-20

    申请人： Bozidar Radunovic ,  Ranveer Chandra ,  Dinan Srilal Gunawardena

    发明人： Bozidar Radunovic ,  Ranveer Chandra ,  Dinan Srilal Gunawardena

    IPC分类号： H04W4/00

    CPC分类号： H04L5/0051 ,  H04L1/0006 ,  H04L5/0032 ,  H04L5/0062 ,  H04L27/2613 ,  H04W74/0808

    摘要： Wireless protocols in the unlicensed spectrum are developed for different requirements in terms of transmit range and power, which makes it difficult for multiple nodes having disparate transmit ranges to coexist in the same unlicensed spectrum. A short-range wireless node uses adaptive preambles to signal presence to long-range wireless nodes outside of its transmit range. In addition, a long-range wireless node detects an adapter preamble and backs-off transmissions for reservation period dedicated to short-range nodes.

    摘要翻译： 针对发射范围和功率方面的不同要求开发了无许可频谱中的无线协议，这使得具有不同发射范围的多个节点难以在相同的未许可频谱中共存。 短距离无线节点使用自适应前导码来将信号发送到其发射范围之外的远程无线节点。 此外，远程无线节点检测用于短距离节点专用的预留时段的适配器前导码和后退传输。

    Dynamic channel-width allocation in wireless networks
    69.
    发明授权
    Dynamic channel-width allocation in wireless networks 有权
    无线网络中的动态通道宽度分配

    公开(公告)号：US08243612B2

    公开(公告)日：2012-08-14

    申请号：US11832624

    申请日：2007-08-01

    申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

    发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

    IPC分类号： H04W16/02 ,  H04W24/02 ,  H04W28/20 ,  H04B7/00

    CPC分类号： H04W16/10 ,  H04W28/16

    摘要： Techniques for enhancing throughput capacity and/or bandwidth distribution fairness among APs in a wireless network are described. Specifically, a channel frequency profile which includes a center frequency and channel-width (i.e., channel bandwidth) is dynamically assigned to each of one or more APs in a wireless network. The assigned channel frequency profile for each AP is based, at least in part, on the current composition of the wireless network including, its topology and traffic load distribution. In this regard, each AP's channel frequency profile can be continuously or periodically changed such that the entire available frequency spectrum is effectively utilized and/or interference between APs is avoided or limited. This, in turn, enhances the throughput capacity and/or bandwidth distribution fairness of the wireless network.

    摘要翻译： 描述了用于在无线网络中的AP之间增强吞吐量容量和/或带宽分配公平性的技术。 具体地，包括中心频率和信道宽度（即，信道带宽）的信道频率分布被动态分配给无线网络中的一个或多个AP的每一个。 每个AP的分配的信道频率分布至少部分地基于无线网络的当前组成，包括其拓扑和业务负载分布。 在这方面，可以连续地或周期性地改变每个AP的信道频率分布，使得有效利用整个可用频谱和/或避免或限制AP之间的干扰。 这又增强了无线网络的吞吐能力和/或带宽分配公平性。

    Self-configuring wireless network location system
    70.
    发明授权
    Self-configuring wireless network location system 有权
    自配置无线网络定位系统

    公开(公告)号：US08155662B2

    公开(公告)日：2012-04-10

    申请号：US11753536

    申请日：2007-05-24

    申请人： Brian D. Zill ,  Alastair Wolman ,  Jitendra D. Padhye ,  Paramvir Bahl ,  Ranveer Chandra

    发明人： Brian D. Zill ,  Alastair Wolman ,  Jitendra D. Padhye ,  Paramvir Bahl ,  Ranveer Chandra

    IPC分类号： H04W24/00 ,  H04W4/00

    CPC分类号： H04W24/02 ,  G01S5/02 ,  G01S5/14 ,  H04L41/0213 ,  H04L41/0806 ,  H04L41/0886 ,  H04L41/12 ,  H04W64/00 ,  H04W84/18

    摘要： Wireless adapters are installed on one or more general purpose computing devices and are connected via a network in an enterprise environment. The adapters are densely deployed at known locations throughout the environment and are configured as air monitors. The air monitors monitor signals transmitted by one or more transceiver devices and records information about these signals. One or more analysis or inference engines may be deployed to obtain the recorded signal information and the air monitor locations to determine a location of the one or more wireless transceivers devices deployed in the environment.

    摘要翻译： 无线适配器安装在一个或多个通用计算设备上，并通过企业环境中的网络连接。 适配器密集地部署在整个环境中的已知位置，并配置为空气监视器。 空气监视器监视由一个或多个收发器设备发送的信号并记录关于这些信号的信息。 可以部署一个或多个分析或推理引擎以获得记录的信号信息和空中监视器位置，以确定部署在环境中的一个或多个无线收发器设备的位置。