公开(公告)号：US07907562B2

公开(公告)日：2011-03-15

申请号：US11766013

申请日：2007-06-20

申请人： Rohan N Murty ,  Ranveer Chandra ,  Jitendra D. Padhye ,  Alastair Wolman ,  Brian D. Zill

发明人： Rohan N Murty ,  Ranveer Chandra ,  Jitendra D. Padhye ,  Alastair Wolman ,  Brian D. Zill

IPC分类号： H04M1/00

CPC分类号： H04W48/02 ,  H04W48/10 ,  H04W48/20

摘要： Techniques for enhancing the throughput capacity available to client devices connected to a wireless local area network (WLAN) are described. Specifically, existing WLAN resources are converted into wireless access points (APs) to create a dense infrastructure of wireless APs. To leverage this dense AP infrastructure, central management techniques are employed. With client-to-AP mapping, these techniques are used to prevent the discovery of multiple APs in a WLAN by a client device and to select a single AP (using certain policies) to associate with the client device and provide it with an enhanced wireless connection to the WLAN. Additionally, techniques are employed to centrally determine, using central policies, when the AP should disassociate from the client device and when another centrally selected AP should respond to, and associate with, the client device to provide it with an enhanced wireless connection to the WLAN—without interrupting/disrupting the client device's access.

摘要翻译： 描述了用于增强连接到无线局域网（WLAN）的客户端设备的可用吞吐量的技术。 具体来说，将现有的WLAN资源转换成无线接入点（AP）以创建无线AP的密集基础设施。 为了利用这一密集的AP基础设施，采用中央管理技术。 使用客户端到AP映射，这些技术用于防止客户端设备在WLAN中发现多个AP，并选择单个AP（使用特定策略）与客户端设备关联并向其提供增强型无线 连接到WLAN。 另外，采用技术来集中确定使用中央策略时，AP应该与客户端设备脱离关系，以及当另一个集中选择的AP应该响应客户端设备并与客户端设备关联以向WLAN提供增强的无线连接时 - 不中断/中断客户端设备的访问。

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。

公开(公告)号：US20100128628A1

公开(公告)日：2010-05-27

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： H04L12/26

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。

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。

公开(公告)号：US20100074125A1

公开(公告)日：2010-03-25

申请号：US12238233

申请日：2008-09-25

申请人： Ranveer Chandra ,  Srikanth Kandula

发明人： Ranveer Chandra ,  Srikanth Kandula

IPC分类号： G06F11/30

CPC分类号： H04L63/145 ,  H04L41/0631 ,  H04L41/0846 ,  H04L41/085 ,  H04L41/0873 ,  H04L41/16 ,  H04L43/00

摘要： The claimed subject matter provides a system and/or a method that facilitates managing a network by mining a communication rule. An analysis engine can employ a packet trace within a network in order to provide timing information, wherein the network includes at least one of a host, a protocol, or an application. A traffic evaluator can extract a communication rule for the network based upon an activity matrix generated from the timing information in which the activity matrix includes at least one of a row of a time window for the packet trace and a column for a flow in the packet trace.

摘要翻译： 所要求保护的主题提供通过挖掘通信规则来便于管理网络的系统和/或方法。 分析引擎可以在网络内采用分组跟踪，以提供定时信息，其中网络包括主机，协议或应用中的至少一个。 流量评估器可以基于从定时信息生成的活动矩阵来提取网络的通信规则，其中活动矩阵包括用于分组跟踪的时间窗的一行和分组中的流的列中的至少一个 跟踪。

公开(公告)号：US20090088089A1

公开(公告)日：2009-04-02

申请号：US11866092

申请日：2007-10-02

申请人： Ranveer Chandra ,  Christos Gkantsidis ,  Ratul Mahajan ,  Antony Ian Taylor Rowstron ,  Alastair Wolman ,  Yongqiang Xiong

发明人： Ranveer Chandra ,  Christos Gkantsidis ,  Ratul Mahajan ,  Antony Ian Taylor Rowstron ,  Alastair Wolman ,  Yongqiang Xiong

IPC分类号： H04B7/02

CPC分类号： H04B7/02 ,  H04B7/04 ,  H04B7/12 ,  H04W28/18 ,  H04W64/006

摘要： A dual mode communication device utilizes a control channel to exploit diversity, history, and context in advance of establishing a broadband data exchange session on a broadband but shorter range wireless data channel, maximizing productive use of such a session. Appropriate diversity for the negotiated session further enhance data transfer, including path diversity, radio technology diversity (e.g., WiMax, Wi-Fi, ultra wideband, Bluetooth), antenna diversity (e.g., MIMO), modulation diversity (e.g., rate selection for 802.11, or symbol length selection to combat multi-path fading), and frequency diversity (e.g., 2.4 GHz versus 5 GHz). Historical information about channel characteristics optimize the selection of channel parameters with respect to the diversity choices. In addition, context information such as location and speed can be used to categorize the historical information that is collected to further optimize channel parameters.

摘要翻译： 提前在宽带但较短范围的无线数据信道上建立宽带数据交换会话，双模式通信设备利用控制信道来利用分集，历史和上下文，从而最大化这种会话的生产性使用。 协商会话的适当分集进一步增强数据传输，包括路径分集，无线电技术分集（例如WiMax，Wi-Fi，超宽带，蓝牙），天线分集（例如，MIMO），调制分集（例如，802.11的速率选择 ，或符号长度选择以对抗多径衰落）和频率分集（例如，2.4GHz与5GHz）。 关于信道特征的历史信息优化了对于多样性选择的信道参数的选择。 此外，可以使用位置和速度等上下文信息对收集的历史信息进行分类，以进一步优化信道参数。

公开(公告)号：US20080320108A1

公开(公告)日：2008-12-25

申请号：US11766045

申请日：2007-06-20

申请人： Rohan N. Murty ,  Ranveer Chandra ,  Jitendra D. Padhye ,  Alastair Wolman ,  Brian D. Zill

发明人： Rohan N. Murty ,  Ranveer Chandra ,  Jitendra D. Padhye ,  Alastair Wolman ,  Brian D. Zill

IPC分类号： G06F15/177

CPC分类号： H04W48/20 ,  H04W84/12

摘要： Techniques for enhancing the throughput capacity available to client devices connected to a wireless local area network (WLAN) are described. Specifically, existing WLAN resources are converted into wireless access points (APs) to create a dense infrastructure of wireless APs. To leverage this dense AP infrastructure, central management techniques are employed. With client-to-AP mapping, these techniques are used to prevent the discovery of multiple APs in a WLAN by a client device and to select a single AP (using certain policies) to associate with the client device and provide it with an enhanced wireless connection to the WLAN. Additionally, techniques are employed to centrally determine, using certain policies, when the AP should disassociate from the client device and when another centrally selected AP should respond to, and associate with, the client device to provide it with an enhanced wireless connection to the WLAN—without interrupting/disrupting the client device's access.

摘要翻译： 描述了用于增强连接到无线局域网（WLAN）的客户端设备的可用吞吐量的技术。 具体来说，将现有的WLAN资源转换成无线接入点（AP）以创建无线AP的密集基础设施。 为了利用这一密集的AP基础设施，采用中央管理技术。 使用客户端到AP映射，这些技术用于防止客户端设备在WLAN中发现多个AP，并选择单个AP（使用特定策略）与客户端设备关联并向其提供增强型无线 连接到WLAN。 另外，采用技术来集中地确定使用某些策略时AP何时与客户端设备分离，以及当另一个集中选择的AP应该响应客户端设备并与客户端设备关联以向WLAN提供增强的无线连接时 - 不中断/中断客户端设备的访问。

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。

公开(公告)号：US20080200181A1

公开(公告)日：2008-08-21

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： H04Q7/20

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。

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。