公开(公告)号：USD283890S

公开(公告)日：1986-05-20

申请号：US728380

申请日：1985-04-29

申请人： David M. Britz ,  Donald M. Genaro ,  John N. McGarvey ,  Michael P. Zambelli

设计人： David M. Britz ,  Donald M. Genaro ,  John N. McGarvey ,  Michael P. Zambelli

公开(公告)号：US08385345B2

公开(公告)日：2013-02-26

申请号：US11901766

申请日：2007-09-19

申请人： Lusheng Ji ,  David M. Britz

发明人： Lusheng Ji ,  David M. Britz

IPC分类号： H04L12/56

CPC分类号： H04W40/12 ,  H04H60/56 ,  H04L1/004 ,  H04L29/08459 ,  H04L45/00 ,  H04L45/128 ,  H04L45/20 ,  H04L45/24 ,  H04L45/26 ,  H04L45/42 ,  H04L45/64 ,  H04L45/74 ,  H04L47/286 ,  H04L47/801 ,  H04L49/208 ,  H04L51/12 ,  H04W8/005 ,  H04W28/04 ,  H04W28/065 ,  H04W40/02 ,  H04W40/04 ,  H04W84/18

摘要： A system and method are disclosed for forwarding data in hybrid wireless mesh networks. The method includes configuring a number of mesh network nodes as Potential Relay Nodes (PRNs) in an overlay network associated with a hybrid wireless mesh network, streaming data packets from a source node to a destination node using a native data forwarding algorithm of the hybrid wireless mesh network, dynamically identifying Relay Nodes (RNs) among PRNs in the overlay network, creating secondary paths for sending data packets towards selected RNs in the overlay network, and relaying data packets from RNs to the destination node using the overlay network.

公开(公告)号：US20110148647A1

公开(公告)日：2011-06-23

申请号：US12645023

申请日：2009-12-22

申请人： Robert R. Miller, II ,  Edward G. Amoroso ,  Susan R. Bailey ,  Lusheng Ji ,  Harry R. Worstell ,  David M. Britz

发明人： Robert R. Miller, II ,  Edward G. Amoroso ,  Susan R. Bailey ,  Lusheng Ji ,  Harry R. Worstell ,  David M. Britz

IPC分类号： G08B21/00 ,  E02D29/14 ,  H04N7/18

CPC分类号： G08B13/1672 ,  E02D29/14 ,  E02D29/1481 ,  G08B13/19697

摘要： A security device for detecting the position of a manhole cover includes a pinger device, such as an acoustic pinger, that transmits a signal in the direction of the expected position of the manhole cover. The device takes energy samples to determine if the signal has been reflected back by the manhole cover. If the device determines the signal has not been reflected, it determines that the manhole cover has been moved from the expected position. In response, the device captures an image of an area around the expected position of the manhole cover. In addition, the device can notify a remote security station via a network that the manhole cover has been moved.

摘要翻译： 用于检测人孔盖的位置的安全装置包括在井眼盖的预期位置的方向上发送信号的呼吸器装置，例如声孔。 该装置采用能量样本来确定信号是否已被人孔盖反射回来。 如果设备确定信号未被反映，则确定人孔盖已从预期位置移动。 作为响应，设备捕获围绕人孔盖的预期位置的区域的图像。 此外，设备可以经由网络通知远程安全站人造井盖被移动。

公开(公告)号：US20090073921A1

公开(公告)日：2009-03-19

申请号：US11901766

申请日：2007-09-19

申请人： Lusheng Ji ,  David M. Britz

发明人： Lusheng Ji ,  David M. Britz

IPC分类号： H04Q7/00

CPC分类号： H04W40/12 ,  H04H60/56 ,  H04L1/004 ,  H04L29/08459 ,  H04L45/00 ,  H04L45/128 ,  H04L45/20 ,  H04L45/24 ,  H04L45/26 ,  H04L45/42 ,  H04L45/64 ,  H04L45/74 ,  H04L47/286 ,  H04L47/801 ,  H04L49/208 ,  H04L51/12 ,  H04W8/005 ,  H04W28/04 ,  H04W28/065 ,  H04W40/02 ,  H04W40/04 ,  H04W84/18

摘要： A system and method are disclosed for forwarding data in hybrid wireless mesh networks. The method includes configuring a number of mesh network nodes as Potential Relay Nodes (PRNs) in an overlay network associated with a hybrid wireless mesh network, streaming data packets from a source node to a destination node using a native data forwarding algorithm of the hybrid wireless mesh network, dynamically identifying Relay Nodes (RNs) among PRNs in the overlay network, creating secondary paths for sending data packets towards selected RNs in the overlay network, and relaying data packets from RNs to the destination node using the overlay network.

摘要翻译： 公开了用于在混合无线网状网络中转发数据的系统和方法。 该方法包括将多个网状网络节点配置为与混合无线网状网络相关联的覆盖网络中的潜在中继节点（PRN），使用混合无线网络的本机数据转发算法将数据分组从源节点传输到目的地节点 网络网络，动态地识别覆盖网络中的PRN之间的中继节点（RN），创建用于向覆盖网络中的所选RN发送数据分组的辅助路径，以及使用覆盖网络将数据分组从RN中继到目的地节点。

公开(公告)号：US07010227B1

公开(公告)日：2006-03-07

申请号：US10691949

申请日：2003-10-23

申请人： David M. Britz ,  Jeevan Prakash Dodley ,  Lih-Yuan Lin ,  Robert R. Miller

发明人： David M. Britz ,  Jeevan Prakash Dodley ,  Lih-Yuan Lin ,  Robert R. Miller

IPC分类号： H04J14/00

CPC分类号： H04B10/1125

摘要： A communication system includes a plurality of nodes and a plurality of point-to-point links that interconnect the plurality of nodes into a network. Each node includes an optical switch to controllably route a plurality of in-ports of the optical switch into a plurality of out-ports of the optical switch. Each point-to-point link includes a free space optical channel. A first free space optical channel couples to a first node through a receive path and through a transmit path. The receive path couples to a respective in-port of the optical switch of the first node, and the transmit path couples to a respective out-port of the optical switch of the first node. In an alternative embodiment, a communication hub includes a plurality of neighborhood links to corresponding users, an optical switch coupled to the plurality of neighborhood links, and a trunk coupled between the optical switch and a free space optical channel link to the network. A method of communicating in a network having plural links includes sensing the presence of a received signal failure by monitoring channel losses in a first link the received signal failure resulting from at least one of rain and fog. The method further includes sending data in a free space optical channel of the first link when the received signal failure sensed is due to rain and sending the data in an RF channel of the first link when the received signal failure sensed is due to fog.

摘要翻译： 通信系统包括将多个节点互连到网络中的多个节点和多个点对点链路。 每个节点包括光开关，用于将光开关的多个入口可控地路由到光开关的多个输出端口中。 每个点对点链路包括自由空间光通道。 第一自由空间光信道通过接收路径并通过发送路径耦合到第一节点。 接收路径耦合到第一节点的光交换机的相应入口，并且发送路径耦合到第一节点的光开关的相应输出端口。 在替代实施例中，通信集线器包括到相应用户的多个邻居链路，耦合到多个邻居链路的光学交换机以及耦合在光学交换机和到网络的自由空间光信道链路之间的中继。 在具有多个链路的网络中进行通信的方法包括通过监视第一链路中的信道损失来检测接收到的信号故障的存在，所述信号损失是由雨和雾中的至少一个导致的。 所述方法还包括当所感测到的接收到的信号故障是由于雨而在第一链路的RF信道中发送数据时发送数据在第一链路的自由空间光信道中，并且当所感测的接收信号故障是由于雾而发送的。

公开(公告)号：USD327479S

公开(公告)日：1992-06-30

申请号：US593940

申请日：1990-10-01

申请人： David M. Britz

设计人： David M. Britz

公开(公告)号：US08767958B2

公开(公告)日：2014-07-01

申请号：US13602218

申请日：2012-09-03

申请人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

发明人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

IPC分类号： H04K1/10

CPC分类号： H04B10/85 ,  H04B10/11 ,  H04K1/003 ,  H04K1/02 ,  H04K1/10 ,  H04L63/0428 ,  H04L2209/80 ,  H04Q11/0003

摘要： A secure, open-air communication system utilizes a plurality of “decoy” data signals to hide one or more true data signals. The true data signal(s) are channel hopped with the plurality of decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted in an open-air communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting both the true and decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).

摘要翻译： 安全的露天通信系统利用多个“诱饵”数据信号来隐藏一个或多个真实数据信号。 真数据信号与多个诱饵数据信号进行信道跳频，以形成随后在露天通信系统中发送的多信道“加扰”输出信号。 诱饵信号的数量越多，对露天系统的安全性就越大。 可以通过在加扰之前加密真实信号和诱饵信号和/或通过利用空间不同的发射器和接收器组来提供进一步的安全性。 窃听者无需知道真实信号的信道分配，就可以拦截（并且随着时间的推移，或许解扰）露天传输的信号，将无法区分真实数据 从诱饵而不知道频道分配。

公开(公告)号：US08682171B1

公开(公告)日：2014-03-25

申请号：US12485440

申请日：2009-06-16

申请人： David M. Britz ,  Jeevan Prakash Dodley ,  Lih-Yuan Lin ,  Robert R. Miller

发明人： David M. Britz ,  Jeevan Prakash Dodley ,  Lih-Yuan Lin ,  Robert R. Miller

IPC分类号： H04B10/11

CPC分类号： H04B10/11 ,  H04B10/0795 ,  H04B10/1123 ,  H04B10/1125 ,  H04J14/02 ,  H04Q11/0067 ,  H04Q2011/0026 ,  H04Q2011/0081

摘要： A communication system includes a plurality of nodes and a plurality of point-to-point links that interconnect the plurality of nodes into a network. Each node includes an optical switch to controllably route a plurality of in-ports of the optical switch into a plurality of out-ports of the optical switch. Each point-to-point link includes a free space optical channel. A first free space optical channel couples to a first node through a receive path and through a transmit path. The receive path couples to a respective in-port of the optical switch of the first node, and the transmit path coupled to a respective out-port of the optical switch of the first node. In an alternative embodiment, a communication hub includes a plurality of neighborhood links, and a trunk coupled between the optical switch and a free space optical channel link to the network. A method of communicating in a network having plural links includes sensing the presence of a received signal failure resulting from at least one of rain and fog. The method further includes sending data in a free space optical channel of the first link when the received signal failure sensed is due to rain and sending the data in an RF channel of the first link when the received signal failure is due to fog.

摘要翻译： 通信系统包括将多个节点互连到网络中的多个节点和多个点对点链路。 每个节点包括光开关，用于将光开关的多个入口可控地路由到光开关的多个输出端口中。 每个点对点链路包括自由空间光通道。 第一自由空间光信道通过接收路径并通过发送路径耦合到第一节点。 接收路径耦合到第一节点的光交换机的相应入口，并且发送路径耦合到第一节点的光开关的相应输出端口。 在替代实施例中，通信集线器包括多个邻域链路，以及耦合在光学交换机和到网络的自由空间光信道链路之间的中继。 在具有多个链路的网络中进行通信的方法包括：检测由雨和雾中的至少一个导致的接收信号故障的存在。 该方法进一步包括当接收到的信号故障由于下雨而在第一链路的RF信道中发送数据时，在接收到的信号失效是由于雾时，在第一链路的自由空间光信道中发送数据。

公开(公告)号：US20110033044A1

公开(公告)日：2011-02-10

申请号：US12907417

申请日：2010-10-19

申请人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

发明人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

IPC分类号： H04K1/10

CPC分类号： H04B10/85 ,  H04B10/11 ,  H04K1/003 ,  H04K1/02 ,  H04K1/10 ,  H04L63/0428 ,  H04L2209/80 ,  H04Q11/0003

摘要： A secure, open-air communication system utilizes a plurality of “decoy” data signals to hide one or more true data signals. The true data signal(s) are channel hopped with the plurality of decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted in an open-air communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting both the true and decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).

摘要翻译： 安全的露天通信系统利用多个“诱饵”数据信号来隐藏一个或多个真实数据信号。 真数据信号与多个诱饵数据信号进行信道跳频，以形成随后在露天通信系统中发送的多信道“加扰”输出信号。 诱饵信号的数量越多，对露天系统的安全性就越大。 可以通过在加扰之前加密真实信号和诱饵信号和/或通过利用空间不同的发射器和接收器组来提供进一步的安全性。 窃听者无需知道真实信号的信道分配，就可以拦截（并且随着时间的推移，或许解扰）露天传输的信号，将无法区分真实数据 从诱饵而不知道频道分配。

公开(公告)号：US20130010951A1

公开(公告)日：2013-01-10

申请号：US13602218

申请日：2012-09-03

申请人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

发明人： David M. Britz ,  Robert Raymond Miller, II ,  Nemmara K. Shankaranarayanan

IPC分类号： H04K1/10

CPC分类号： H04B10/85 ,  H04B10/11 ,  H04K1/003 ,  H04K1/02 ,  H04K1/10 ,  H04L63/0428 ,  H04L2209/80 ,  H04Q11/0003

摘要： A secure, open-air communication system utilizes a plurality of “decoy” data signals to hide one or more true data signals. The true data signal(s) are channel hopped with the plurality of decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted in an open-air communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting both the true and decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).

摘要翻译： 安全的露天通信系统利用多个诱饵数据信号来隐藏一个或多个真实数据信号。 真数据信号与多个诱饵数据信号进行信道跳频，以形成多路加扰输出信号，此后在露天通信系统中传输。 诱饵信号的数量越多，对露天系统的安全性就越大。 可以通过在加扰之前加密真实信号和诱饵信号和/或通过利用空间不同的发射器和接收器组来提供进一步的安全性。 窃听者无需知道真实信号的信道分配，就可以拦截（并且随着时间的推移，或许解扰）露天传输的信号，将无法区分真实数据 从诱饵而不知道频道分配。