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    Dynamic channel-width allocation in wireless networks
    63.
    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。

    OPPORTUNISTIC USE OF WIRELESS NETWORK STATIONS AS REPEATERS
    64.
    发明申请
    OPPORTUNISTIC USE OF WIRELESS NETWORK STATIONS AS REPEATERS 有权
    无线网络作为替代机构的机会性使用

    公开(公告)号：US20120014313A1

    公开(公告)日：2012-01-19

    申请号：US13245314

    申请日：2011-09-26

    申请人： Ranveer Chandra ,  Paramvir Bahl ,  Jitendra D. Padhye ,  Yan Yu

    发明人： Ranveer Chandra ,  Paramvir Bahl ,  Jitendra D. Padhye ,  Yan Yu

    IPC分类号： H04B7/14

    CPC分类号： H04W8/245 ,  H04W8/22 ,  H04W48/18 ,  H04W88/06

    摘要： Implementation of opportunistic use of stations in a wireless network as repeaters is described. In one implementation, a station detects the existence of rate anomaly in a wireless network. In response to the rate anomaly, the station may transform into a software repeater for certain other neighboring stations. The repeater function allows for the relaying of packets sent by these neighboring stations to the access point and vice versa. The other neighboring stations, owing to their relative proximity to the repeater station, transmit data at a higher rate to the repeater station. Thus, the removal of the slower stations reduces clogging of the access point and increases the overall data rate within the wireless network. Further, a zero-overhead network coding protocol may be implemented in conjunction with the repeater function to increase capacity of the wireless network.

    摘要翻译： 描述了在无线网络中实现机会性使用站点作为中继器。 在一个实现中，站检测无线网络中的速率异常的存在。 响应于速率异常，站可以转换成某些其他邻近站的软件中继器。 中继器功能允许将由这些相邻站发送的分组中继到接入点，反之亦然。 其他相邻站由于其相对接近中继站而以更高的速率向中继站发送数据。 因此，较慢站的移除减少了接入点的堵塞并增加了无线网络内的总体数据速率。 此外，零开销网络编码协议可以结合中继器功能来实现，以增加无线网络的容量。

    ENABLING WHITE SPACE NETWORKS INDEPENDENT OF LOW-THRESHOLD SENSING
    65.
    发明申请
    ENABLING WHITE SPACE NETWORKS INDEPENDENT OF LOW-THRESHOLD SENSING 有权
    启用独立于低阈值感应的白色空间网络

    公开(公告)号：US20110317019A1

    公开(公告)日：2011-12-29

    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： H04N17/00

    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。

    Spectrum Assignment for Networks Over White Spaces and Other Portions of the Spectrum
    66.
    发明申请
    Spectrum Assignment for Networks Over White Spaces and Other Portions of the Spectrum 有权
    频谱分配在白色空间和频谱的其他部分的网络

    公开(公告)号：US20100304678A1

    公开(公告)日：2010-12-02

    申请号：US12473963

    申请日：2009-05-28

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

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

    IPC分类号： H04B17/00

    CPC分类号： H04W72/02 ,  H04W16/14 ,  H04W24/08 ,  H04W72/1226

    摘要： Functionality is described by selecting a channel in an environment in which non-privileged entities have subordinate access rights to spectrum compared to privileged entities. The functionality operates by identifying spectrum that is available to all nodes involved in communication (where the nodes are associated with non-privileged entities). The functionality then generates a suitability assessment for each candidate channel within the available spectrum. The functionality selects a channel having the most desirable suitability assessment. The functionality can form a suitability assessment for a candidate channel of arbitrary width, e.g., by combining suitability assessments associated with constituent spectrum units within the candidate channel.

    摘要翻译： 通过在非特权实体具有与特权实体相比具有次要访问权限的环境中选择一个通道来描述功能。 该功能通过识别对于通信中涉及的所有节点（其中节点与非特权实体相关联）可用的频谱进行识别。 然后，该功能为可用频谱内的每个候选信道生成适合性评估。 功能选择具有最理想的适用性评估的通道。 功能可以形成对任意宽度的候选信道的适用性评估，例如通过组合与候选信道内的组成频谱单元相关联的适用性评估。

    Method to enable simultaneous connections to multiple wireless networks using a single radio
    67.
    发明授权
    Method to enable simultaneous connections to multiple wireless networks using a single radio 有权
    使用单个无线电同时连接到多个无线网络的方法

    公开(公告)号：US07720045B2

    公开(公告)日：2010-05-18

    申请号：US10428218

    申请日：2003-05-02

    申请人： Paramvir Bahl ,  Pradeep Bahl ,  Ranveer Chandra

    发明人： Paramvir Bahl ,  Pradeep Bahl ,  Ranveer Chandra

    IPC分类号： H04J3/06 ,  G06F15/16 ,  H04L7/00

    CPC分类号： H04W8/245 ,  H04J3/0641 ,  H04J3/0658 ,  H04W8/22 ,  H04W48/18 ,  H04W88/06

    摘要： A system and method that allows a user to concurrently connect to multiple wireless networks with a single network interface card is presented. The networks may be infrastructure (“IS”) networks and ad hoc (“AH”) networks. A driver is inserted into a device's networking stack and exposes a plurality of virtual wireless network adapters, one for each network. The adapters are enabled and disabled in accordance with which network is presently activated. Packets for a network are queued when the network is not enabled. The wireless driver controls the switching of the network card. In one embodiment where multiple wireless cards are switching in and out of AH networks, the method converges the switching times for the cards in an AH network to ensure concurrent connectivity in the AH network for at least a brief time period every switching cycle of the wireless cards.

    摘要翻译： 提出了允许用户使用单个网络接口卡同时连接到多个无线网络的系统和方法。 网络可以是基础设施（“IS”）网络和特设（“AH”）网络。 将驱动程序插入到设备的网络堆栈中，并暴露多个虚拟无线网络适配器，每个网络一个。 根据当前激活的网络，启用和禁用适配器。 当网络未启用时，网络的数据包将排队。 无线驱动程序控制网卡的切换。 在多个无线卡正在进出AH网络的一个实施例中，该方法收敛在AH网络中的卡的切换时间，以确保AH网络中的并发连接在无线的每个切换周期的至少短时间段内 牌。

    Constructing an Inference Graph for a Network
    68.
    发明申请
    Constructing an Inference Graph for a Network 有权
    构建网络的推理图

    公开(公告)号：US20080222287A1

    公开(公告)日：2008-09-11

    申请号：US12039714

    申请日：2008-02-28

    申请人： Paramvir Bahl ,  Srikanth Kandula ,  Ranveer Chandra ,  David A. Maltz ,  Ming Zhang ,  Albert Greenberg

    发明人： Paramvir Bahl ,  Srikanth Kandula ,  Ranveer Chandra ,  David A. Maltz ,  Ming Zhang ,  Albert Greenberg

    IPC分类号： G06F17/00 ,  G06F15/173

    CPC分类号： H04L41/5058 ,  H04L41/12

    摘要： Constructing an inference graph relates to the creation of a graph that reflects dependencies within a network. In an example embodiment, a method includes determining dependencies among components of a network and constructing an inference graph for the network responsive to the dependencies. The components of the network include services and hardware components, and the inference graph reflects cross-layer components including the services and the hardware components. In another example embodiment, a system includes a service dependency analyzer and an inference graph constructor. The service dependency analyzer is to determine dependencies among components of a network, the components including services and hardware components. The inference graph constructor is to construct an inference graph for the network responsive to the dependencies, the inference graph reflecting cross-layer components including the services and the hardware components.

    摘要翻译： 构造推理图与创建反映网络中依赖关系的图形有关。 在示例实施例中，一种方法包括确定网络的组件之间的依赖关系，并响应于依赖关系构建网络的推理图。 网络的组件包括服务和硬件组件，推理图反映了跨层组件，包括服务和硬件组件。 在另一示例实施例中，系统包括服务依赖性分析器和推理图构造器。 服务依赖性分析器是确定网络组件之间的依赖关系，包括服务和硬件组件在内的组件。 推理图构造函数是响应于依赖关系构建网络的推理图，反映包括服务和硬件组件在内的跨层组件的推理图。

    Media Access Control (MAC) Protocol for Cognitive Wireless Networks
    69.
    发明申请
    Media Access Control (MAC) Protocol for Cognitive Wireless Networks 有权
    用于认知无线网络的媒体访问控制（MAC）协议

    公开(公告)号：US20080130519A1

    公开(公告)日：2008-06-05

    申请号：US11847034

    申请日：2007-08-29

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

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

    IPC分类号： H04L12/24 ,  H04Q7/00

    CPC分类号： H04L12/2602 ,  H04L43/00 ,  H04L43/0882 ,  H04L43/16 ,  H04W16/14

    摘要： A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.

    摘要翻译： 描述了用于认知无线网络的新的媒体接入控制（MAC）协议。 新的MAC协议允许诸如蜂窝电话和具有无线的计算机的多个节点中的每一个确定诸如电视广播频带之类的通信频谱的利用。 节点协作实现其本地附近的频谱利用的组合视图，其中调度的用户和空时间段在广泛的频率范围内被映射。 节点相互协商以在协商的频率上保留用于分组交换的频谱的空闲段。 控制分组结构允许节点在握手期间变得预先考虑本地频谱利用。 在新MAC下操作的认知设备具有扫描频谱并监视控制信道的第一无线电; 以及用于分组传输的具有可调参数（包括频率和带宽）的第二可重新配置的无线电。