Bbnt Solutions LLC.

Other

Verizon Corporate Services Group Inc.

Bbn Technologies Corporation

William Scott Passman

Brig Barnum Elliott

Joseph Jacob Weinstein

John R Zavgren

Keith William Manning

Subramanian Ramanathan

Isidro Marcos Castineyra

John Richard Zavgren, Jr

Joanna L Kulik

Norman Rehn

Susan L Wood

Timothy W Corbitt

In an apparatus for varying the rate at which the broadcast beacons are transmitted, there is at least one router (). The router transmits beacons which contain various types of data, controls the rate at which the beacons are transmitted, and adaptively varies the rate at which the beacons are transmitted, in response to a variety of network conditions.

Method and apparatus for varying the rate at which broadcast beacons are transmitted

In a radio network having plural routers (), each router includes a routing table (). Link state information of the network that has been forwarded to the router is received and used to determine the connections in the network. The determined network connections are collected to generate network topology information which is placed in the routing table (). The network topology information is retrievable for inclusion in messages forwarded by the receiving router.

Radio network routing apparatus

A communications system has stations arranged in clusters (and) of communication member stations (CM, CM, CMand CM), with one member station (CH, CHor CH) in each cluster being a head station for the cluster. Each member station (CM, CM, CMand CM) communicates with the network through a cluster head station (CH, CHor CH). The cluster head stations (CH, CHand CH) communicate among other cluster head stations (CH, CHand CH). A mobile communications station (e.g., CM) evaluates a beacon message received from a first member station (e.g., CM) of the plurality of mobile stations through a transceiver. The station CMalso determines whether to communicate with the first member station CMdirectly or to communicate with the first member station CMby forwarding messages through a cluster head station CHthat is affiliated to the mobile communications station CM

Using direct cluster member to cluster member links to improve performance in mobile communication systems

A system tests the protocols for a network containing a group of network devices. The system includes a simulation controller () that transmits network configuration information during the protocol testing and one or more nodes (-to-N) that emulate a network device, receive the network configuration information from the simulation controller (), and perform one or more operations in response thereto. The system also includes an analysis device () that monitors and analyzes the nodes (-to-N) during the protocol testing.

System and method for testing protocols for ad hoc networks

A communication system has stations arranged in clusters of member stations, each of which communicates with the other member stations. One member station is a head station of the cluster that communicates with head stations of other clusters. The stations are configured by determining the communication state between a station and one or more cluster head stations. The station is assigned to at least one cluster when a prescribed communication state has been determined between the station and the cluster head station. The station is set to be in independent communication with the one or more cluster head stations which have the prescribed communication state with the station.

Node belonging to multiple clusters in an ad hoc wireless network

A network for routing packets includes multiple nodes. A first node has a direct link to a second node. The first node receives a packet and identifies a primary next hop to which to transmit the packet ( ). The primary next hop identifies at least the second node. The first node transmits the packet to the second node ( ), determines whether the transmission was successful ( ), and identifies at least a third node when the transmission to the second node was unsuccessful. The first node identifies the third node by: finding a node in the network that has a direct link to both the first and second nodes ( ); identifying at least one alternate next hop, assuming that the link between the first and second nodes is unavailable, determining the cost associated with each of the alternate next hops, and selecting one of the alternate next hops based on the determined cost ( ); or retrieving a predetermined alternate next hop from a forwarding table stored by the first node ( ). The first node then transmits the packet to the third node for forwarding to the second node ( ).

System and methods routing packets on alterate paths

A communications system for communication among plural stations in a network has stations (CH CM CM CH CH CM CM ) arranged in clusters ( ) of communication member stations, each communicating with each other. One of the member stations (CH CH CH ) is a head station of the cluster. The cluster head stations (CH CH CH ) communicate with other cluster head stations (CH CH CH ). A method for configuring the network of stations includes a step of operating at least a first (CH ) and a second (CH ) station of the plural stations as cluster head stations, the first (CH ) and second (CH ) stations forming a communications link. The method also includes a step to resign the first (CH ) station from operating as a cluster head station when a predetermined resignation condition is met. The method also includes a step of maintaining the communication link between the first (CH ) and second (CH ) station as the first station (CH ) transitions from operating as a cluster head station (CH ) to operating as a cluster member station (CM ) of a cluster headed by the second cluster head station (CH ).

Cluster head resignation to improve routing in mobile communication systems

A system includes at least one input monitoring unit that monitors an environment and produces a video and an audio signal corresponding to the environment; a Central Monitoring Office that displays image and sound information corresponding to the video and audio signals; and a self-organized mobile wireless communications network. The at least one input monitoring unit is remote from the Central Monitoring Office and transmits the video and audio signals to the Central Monitoring Office over the wireless communication network.

Video communication system

A communications system for communication among plural stations in a network has stations (CH , CM , CM , CH , CH , CM , CM ) arranged in clusters ( ) of communication member stations, each communicating with each other. One of the member stations (CH , CH , CH ) is a head station of the cluster. The cluster head stations (CH , CH , CH ) communicate with other cluster head stations (CH , CH , CH ). A method for configuring the network of stations includes a step of operating at least a first (CH ) and a second (CH ) station of the plural stations as cluster head stations, the first (CH ) and second (CH ) stations forming a communications link. The method also includes a step to resign the first (CH ) station from operating as a cluster head station when a predetermined resignation condition is met. The method also includes a step of maintaining the communication link between the first (CH ) and second (CH ) station as the first station (CH ) transitions from operating as a cluster head station (CH ) to operating as a cluster member station (CM ) of a cluster headed by the second cluster head station (CH ).

A method for providing a communication link from an aircraft ( ) to a target ( ) is provided. The method includes releasing a first end of a fiber optic cable ( ) from an aircraft ( ) and then lowering the first end of the fiber optic cable ( ) to the target ( ). The method also includes connecting the first end of the fiber optic cable ( ) to a device at the target ( ). The device at the target ( ) may then communicate with devices on the aircraft ( ).

Systems and methods for using airborne communication nodes

A system facilitates visual monitoring of a dangerous location. The system includes a stationary camera device ( ) and at least one mobile display device ( ) corresponding to at least one vehicle. The camera device ( ) captures a video image of the dangerous location and transmits video signals representative of the captured video image. The display device ( ) receives the video signals from the camera device ( ) when the corresponding vehicle is in proximity to the camera device ( ) and presents the video signals as a video image of the dangerous location to a driver of the vehicle.

Video-monitoring safety systems and methods

A device ( ) for coupling a first and a second fiber optic cable ( ) is provided. The device ( ) includes a first member ( ) having an opening to receive the first fiber optic cable ( ). The device ( ) also includes a mechanism ( ) to secure the first fiber optic cable ( ) to the first member ( ) and to constrain rotation of the first fiber optic cable ( ) relative to the first member ( ). The device ( ) also includes a second member ( ) having an opening to receive the second fiber optic cable ( ). The first and second members ( ) are coupled together to align the first and second fiber optic cables ( ) and to allow the first member ( ) to rotate with respect to the second member ( ).

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Lexington, MA, United States of America

William Scott Passman