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公开(公告)号：US08214526B2
公开(公告)日：2012-07-03
申请号：US12696973
申请日：2010-01-29
申请人： Yunnan Wu , Saumitra M. Das , Ranveer Chandra , Dinei Florencio
发明人： Yunnan Wu , Saumitra M. Das , Ranveer Chandra , Dinei Florencio
IPC分类号： G06F15/173
CPC分类号： H04W40/16 , H04L45/123 , H04L45/124 , H04L45/125 , Y02D70/142 , Y02D70/146 , Y02D70/22 , Y02D70/34
摘要： Context-based routing in multi-hop networks involves using a context-based routing metric. In a described implementation, respective path values are calculated for respective ones of multiple paths using the context-based routing metric. A path is selected from the multiple paths responsive to the calculated path values. Data is transmitted over at least one link of the selected path. In an example embodiment, the context-based routing metric is ascertained responsive to an estimated service interval (ESI) of a bottleneck link of each path of the multiple paths. In another example embodiment, the context-based routing metric is ascertained responsive to an expected resource consumption (ERC) metric. In an example embodiment of path selection, the path is selected using a context-based path pruning (CPP) technique that involves maintaining multiple local contexts at each intermediate node, with each local context representing at least one partial path.
摘要翻译： 在多跳网络中基于背景的路由涉及使用基于上下文的路由度量。 在描述的实现中，使用基于上下文的路由度量针对相应的多个路径计算相应的路径值。 响应于所计算的路径值从多个路径中选择路径。 数据通过所选路径的至少一个链路传输。 在示例实施例中，响应于多个路径的每个路径的瓶颈链路的估计服务间隔（ESI）来确定基于上下文的路由度量。 在另一示例性实施例中，响应于预期资源消耗（ERC）度量来确定基于上下文的路由度量。 在路径选择的示例实施例中，使用基于上下文的路径修剪（CPP）技术来选择路径，其涉及在每个中间节点处维护多个本地上下文，其中每个本地上下文表示至少一个部分路径。
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公开(公告)号：US20120148068A1
公开(公告)日：2012-06-14
申请号：US12962676
申请日：2010-12-08
CPC分类号： H04W16/14 , H04R2410/00 , H04R2420/07 , H04W52/50
摘要： Architecture that enables wireless narrowband devices (e.g., wireless microphones) and white space devices to efficiently coexist on the same telecommunications channels, while not interfering with the usability of the wireless narrowband device. The architecture provides interference detection, strobe generation and detection and, power ramping and suppression (interference-free coexistence with spectrum efficiency). The architecture provides the ability of the white space device to learn about the presence of the microphone. This can be accomplished i using a geolocation database, reactively via a strober device, and/or proactively via the strober device. The strober device can be positioned close to the microphone receiver and signals the presence of a microphone to white space devices on demand. The strober device takes into consideration the microphone's characteristics as well as the relative signal strength from the microphone transmitter versus the white space device, in order to enable maximum use of the available white space spectrum.
摘要翻译： 能够使无线窄带设备（例如，无线麦克风）和空白设备在相同的电信信道上有效共存的架构，同时不干扰无线窄带设备的可用性。 该架构提供干扰检测，选通产生和检测以及功率斜坡抑制（与频谱效率无干扰共存）。 该架构提供了白空间设备了解麦克风的存在的能力。 这可以通过使用地理位置数据库，通过选通设备反应地和/或主动地通过选通设备来实现。 选通设备可以靠近麦克风接收器定位，并根据需要将麦克风存在于空白设备。 选通器件考虑到麦克风的特性以及麦克风发射器与白色空间器件的相对信号强度，以便最大限度地利用可用的空白光谱。
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公开(公告)号：US20110317632A1
公开(公告)日：2011-12-29
申请号：US12822209
申请日：2010-06-24
IPC分类号： H04W72/04
摘要： Described is incorporating white space networking components into a network stack. A user mode spectrum access control component determines which white space channels are currently allowed for use based upon policy, current operating status and availability information obtained from one or more sources. A white space service (e.g., in the WLAN service) receives the availability information. The white space service includes a discovery module that discovers other nodes, and a channel migration module that changes from the current channel to another channel if the current channel is no longer allowed for use. A kernel mode (NDIS layer) white space driver through a miniport driver controls the channel in use as the current channel. An automatic configuration module is provided that switches to Wi-Fi network communication when a Wi-Fi network is present, and switches back when a Wi-Fi network is not present.
摘要翻译： 描述将白色空间网络组件合并到网络堆栈中。 用户模式频谱访问控制组件基于从一个或多个源获得的策略，当前操作状态和可用性信息来确定当前允许使用哪个空白信道。 空白服务（例如，在WLAN服务中）接收可用性信息。 白色空间服务包括发现其他节点的发现模块，以及当前通道不再允许使用时，通道迁移模块从当前通道更改为另一个通道。 通过微型端口驱动程序的内核模式（NDIS层）空白驱动程序控制正在使用的通道作为当前通道。 提供自动配置模块，当Wi-Fi网络存在时切换到Wi-Fi网络通信，并且当Wi-Fi网络不存在时切换回。
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公开(公告)号：US08050212B2
公开(公告)日：2011-11-01
申请号：US11676207
申请日：2007-02-16
申请人： Ranveer Chandra , Paramvir Bahl , Jitendra D. Padhye , Yan Yu
发明人： Ranveer Chandra , Paramvir Bahl , Jitendra D. Padhye , Yan Yu
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。
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公开(公告)号：US08040836B2
公开(公告)日：2011-10-18
申请号：US11420616
申请日：2006-05-26
申请人： Yunnan Wu , Jitendra D. Padhye , Ranveer Chandra , Venkata N. Padmanabhan , Philip A. Chou , Mohamed Jawad Khaki
发明人： Yunnan Wu , Jitendra D. Padhye , Ranveer Chandra , Venkata N. Padmanabhan , Philip A. Chou , Mohamed Jawad Khaki
IPC分类号： H04B7/212
CPC分类号： H04L1/1874 , H04L1/0076 , H04L67/327 , H04W28/06 , H04W48/08 , H04W84/12
摘要： A local network coding framework and method including techniques to improve efficiency in a wireless network by reducing overhead. The local network coding method includes exchanging data availability between nodes on the wireless network by sending Bloom filters of lists of packets to neighboring nodes. Based on data availability, optimized mixing of pure packets is performed to form mixture packets for output. A separate acknowledgement buffer keeps track of the pure packets transmitted but not acknowledged. If an acknowledgement does not arrive after a certain time period, the packet is assumed to be lost and is retransmitted. An optimized packet mixing process generates mixture packets and decides which nodes to send the mixture packets. The local network coding framework and method also includes methods for representing the composition of a mixture packet and using mixing at a wireless access point to improve the performance of the wireless local area network.
摘要翻译： 本地网络编码框架和方法包括通过减少开销来提高无线网络的效率的技术。 本地网络编码方法包括通过向相邻节点发送分组列表的Bloom过滤器来在无线网络上的节点之间交换数据可用性。 基于数据可用性，执行纯数据包的优化混合，形成混合数据包进行输出。 单独的确认缓冲区跟踪发送但未确认的纯数据包。 如果确认在某个时间段之后未到达，则假定该分组丢失并被重发。 优化的分组混合过程产生混合分组，并决定哪些节点发送混合分组。 本地网络编码框架和方法还包括用于表示混合分组的组合并在无线接入点使用混合来改善无线局域网的性能的方法。
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36.发明申请Channel Discovery and Disconnection in Networks Over White Spaces and Other Portions of the Spectrum 有权频道发现和断开在白色空间和频谱的其他部分的网络公开(公告)号：US20100301992A1
公开(公告)日：2010-12-02
申请号：US12473951
申请日：2009-05-28
IPC分类号： G05B19/00
CPC分类号： H04W16/14 , H04L27/0006 , H04W72/0453
摘要： Functionality is described for discovering a channel within an environment in which non-privileged entities have subordinate access rights to spectrum compared to privileged entities. The functionality operates by investigating spectrum units within the spectrum for the presence of the channel. In one case, the functionality operates by investigating the spectrum units in linear succession; in another case, the functionality advances in a staggered fashion over the available spectrum. Functionality is also described for handling disconnection by a node from a channel. The functionality allows the node to convey its disconnection status to other communication participants. In one case, various aspects of the functionality are implemented by performing analysis in the time domain.
摘要翻译： 描述了用于发现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的信道的功能。 该功能通过调查频谱内的频谱单元来进行信道的存在。 在一种情况下，通过以线性相继调查频谱单位来操作该功能; 在另一种情况下，功能在可用频谱上以交错方式前进。 还描述了用于处理节点与信道的断开连接的功能。 该功能允许节点将其断开状态传达给其他通信参与者。 在一种情况下，通过在时域中执行分析来实现功能的各个方面。
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公开(公告)号：US20100257281A1
公开(公告)日：2010-10-07
申请号：US12417745
申请日：2009-04-03
IPC分类号： G06F15/173
CPC分类号： G06F15/173 , H04L12/2858 , H04L12/4625
摘要： Alternate communication paths may be analyzed and selected for ongoing communications between two devices. One or both of the communicating devices may identify available communication paths and various identifiers on those paths. The identifiers may be, for example, base stations for a wireless connection, beacon signals, or other information that may be received by the device. After comparing the available communication paths to identify one or more alternative paths, the ongoing communications may be transferred to the alternative path. The initial communication path may be used to pass authentication and encryption information that may be used to establish the alternative path between the devices. The redirection of a communication stream may be performed by an interceptor inserted between the application layer and transport layer in a network stack of the communicating devices.
摘要翻译： 可以分析和选择替代通信路径用于两个设备之间的正在进行的通信。 一个或两个通信设备可以在这些路径上标识可用的通信路径和各种标识符。 标识符可以是例如用于无线连接的基站，信标信号或可由设备接收的其他信息。 在比较可用通信路径以识别一个或多个备选路径之后，正在进行的通信可以被传送到备选路径。 初始通信路径可以用于传递可用于建立设备之间的替代路径的认证和加密信息。 通信流的重定向可以由插入在通信设备的网络堆栈中的应用层和传输层之间的拦截器来执行。
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公开(公告)号：US20100105409A1
公开(公告)日：2010-04-29
申请号：US12395386
申请日：2009-02-27
IPC分类号： H04W64/00
CPC分类号： H04W64/00 , G01S5/0263 , G01S5/0289 , G01S19/48
摘要： A system and method for peer based localization system using radio technology, such as Bluetooth or Wi-Fi ad-hoc technology that enables mobile devices such as cell phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, etc. to discover their physical location relative to one another. In addition, the peer based localization can use a plurality of radio technologies to increase the accuracy of the physical location estimates. Additionally or alternatively, the peer based localization technique can be combined with infrastructure based location techniques, such as triangulation, GPS, or infrastructure based Wi-Fi localization in order to transpose virtual coordinates into physical coordinates.
摘要翻译： 一种使用无线电技术的基于对等的定位系统的系统和方法，例如蓝牙或Wi-Fi专用技术，其使移动设备例如蜂窝电话，智能电话，膝上型计算机，手持通信设备，手持计算设备，卫星无线电，全球 定位系统，PDA等，以发现它们相对于彼此的物理位置。 此外，基于对等的定位可以使用多个无线电技术来增加物理位置估计的准确性。 另外或替代地，基于对等的定位技术可以与基于基础设施的定位技术组合，例如三角测量，GPS或基于Wi-Fi的基础设施定位，以便将虚拟坐标转换成物理坐标。
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公开(公告)号：US07668513B2
公开(公告)日：2010-02-23
申请号：US11474652
申请日：2006-06-26
IPC分类号： H04B17/00
CPC分类号： H04L43/12 , H04L41/0213
摘要： A framework for wireless network management applications in an enterprise environment using existing general purpose computing devices is presented. At least one of the devices is configured with a wireless adapter and is used as an AirMonitor to monitor one or more wireless networks. Other devices are configured as LandMonitors to monitor traffic on a wired network in the enterprise environment. At least one inference engine uses the LandMonitors and AirMonitors by assigning them monitoring tasks. Data from the monitoring tasks are stored in a database. Analysis of the data that is computationally intensive is generally performed by the inference engines. Wireless network management applications use the framework by installing and running application-specific components (e.g., filters) on the AirMonitors, LandMonitors, and/or inference engines.
摘要翻译： 介绍了使用现有通用计算设备的企业环境中无线网络管理应用的框架。 至少一个设备配置有无线适配器，并用作AirMonitor来监视一个或多个无线网络。 其他设备被配置为LandMonitor以监视企业环境中有线网络上的流量。 至少一个推理机通过分配监控任务来使用LandMonitor和AirMonitor。 来自监控任务的数据存储在数据库中。 计算密集的数据的分析通常由推理引擎执行。 无线网络管理应用程序通过在AirMonitor，LandMonitor和/或推理引擎上安装和运行特定于应用程序的组件（例如，过滤器）来使用该框架。
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40.发明授权Detecting and diagnosing performance problems in a wireless network through neighbor collaboration 有权通过邻居协作检测和诊断无线网络中的性能问题公开(公告)号：US07603460B2
公开(公告)日：2009-10-13
申请号：US11047189
申请日：2005-01-31
申请人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
发明人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
IPC分类号： G06F15/173
摘要： Systems and methods are described for detecting and diagnosing performance problems in wireless communications networks. Diagnostic programs execute on a wireless device, neighboring devices, and a wireless access point to collaborate in diagnosing network problems. The neighboring devices eavesdrop on a diagnostic session between the device and the access point to determine problems at the device, the access point, and in the wireless medium. Data from the eavesdropping devices can be summarized and sent to a network administrator for further action. The diagnostic programs are described to contain a passive component for detecting problems, and an active component for running the diagnostic techniques.
摘要翻译： 描述了用于检测和诊断无线通信网络中的性能问题的系统和方法。 诊断程序在无线设备，相邻设备和无线接入点上执行以协作诊断网络问题。 相邻设备窃听设备和接入点之间的诊断会话，以确定设备，接入点和无线介质中的问题。 来自窃听设备的数据可以被汇总并发送给网络管理员进行进一步的操作。 诊断程序被描述为包含用于检测问题的被动组件，以及用于运行诊断技术的活动组件。
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