Patents Assigned to BBN Technologies
  • Systems and methods for implementing contention-based optical channel access
    Patent number: 7424225
    Abstract: A first node (205) in a network includes a non-optical transceiver (415) and an optical subsystem (410). The non-optical transceiver (415) sends a request message to establish an optical link from the first node (205) to a second node via electrical signals over an electrically transmissive medium. The optical subsystem (410) establishes an optical link between the first node and the second node based on the receipt of the request granted message and transmits data between the first node and the second node via optical signals over the optical link.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: September 9, 2008
    Assignee: BBN Technologies Corp.
    Inventor: Brig Barnum Elliott
  • Criteria for tearing down network links
    Patent number: 7423995
    Abstract: The present invention, which may be embodied in or carried out by various components of a data communications network, provides an improved criterion for tearing down network links. The invention allows network components to take into account the quality, status and performance of other network links, as well as the overall performance of the network, when deciding whether to remove a failing network from service.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: September 9, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Brig Barnum Elliott, Joseph Jacob Weinstein
  • Extraction-Empowered machine translation
    Publication number: 20080215309
    Abstract: The invention relates to systems and methods for automatically translating documents from a first language to a second language. To carry out the translation of a document, elements of information are extracted from the document and are translated using one or more specialized translation processes. The remainder of the document is separately translated by a statistical translation process. The translated elements of information and the translated remainder are then merged into a final translated document.
    Type: Application
    Filed: November 30, 2007
    Publication date: September 4, 2008
    Applicant: BBN Technologies Corp.
    Inventors: Ralph M. Weischedel, Jinxi Xu, Michael R. Kayser
  • Systems and methods for high speed packet classification
    Patent number: 7415012
    Abstract: Systems and methods are disclosed for classifying packets with a rule. In one exemplary embodiment, the method includes receiving a packet; determining a key value for the received packet; identifying a rule corresponding to the determined key value by searching a set of rules, the set of rules being decorrelated such that there is no overlap in any key values corresponding to the decorrelated set of rules.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: August 19, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventor: David P. Mankins
  • System and method for disambiguating shooter locations
    Patent number: 7408840
    Abstract: Systems and methods for determining and disambiguating the location of the shooter of supersonic projectiles based on shockwave-only signals are described. Using several spaced sensors, an initial portion of the shockwave-only signals is sensed to determine Time-Differences-Of-Arrival (TDOA) for the sensor pairs. The resulting TDOAs are used to determine the gradient of curvature of the shockwave wavefront on the sensors. The gradient of curvature is then used to determine the disambiguated projectile trajectory.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: August 5, 2008
    Assignee: BBN Technologies Corp.
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Systems and methods for providing automated directory assistance using transcripts
    Patent number: 7401023
    Abstract: An automated directory assistance (130) includes a training system (210) and a directory assistance system (220). The training system (210) trains and maintains the directory assistance system (220). The training system (210) includes a transcription module (310), a speech grammar estimation module (330), a listings statistics estimation module (340), and a required words determination module (350). The transcription module (310) obtains transcripts relating to directory service requests. The speech grammar estimation module (330) creates an n-gram grammar for multiple telephone numbers from the transcripts. The listings statistics estimation module (340) identifies words used to refer to each of the telephone numbers from the transcripts. The required words determination module (350) identifies at least one word that is required to request each of the telephone numbers from the transcripts.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: July 15, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventors: Richard Mark Schwartz, Han Shu, John Makhoul, Long Nguyen
  • Systems and methods for determining shooter locations with weak muzzle detection
    Publication number: 20080159078
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Application
    Filed: March 7, 2008
    Publication date: July 3, 2008
    Applicant: BBN Technologies Corp
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Systems and methods for determining shooter locations with weak muzzle detection
    Publication number: 20080162089
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Application
    Filed: March 7, 2008
    Publication date: July 3, 2008
    Applicant: BBN Technologies Corp
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Method and apparatus for routing data traffic in a cryptographically-protected network
    Patent number: 7392378
    Abstract: The present invention is useful for routing data traffic in data communications networks where some or all of the network interface links are protected by cryptographic techniques, e.g., encryption. The invention routes datagram traffic in such networks toward interface links perceived to have strong encryption protection and away from interface links perceived to have weak or weakening encryption protection, based on the remaining encryption capacity for such links.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: June 24, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventor: Brig Barnum Elliott
  • Unified clustering tree
    Patent number: 7389229
    Abstract: A unified clustering tree (500) generates phoneme clusters based on an input sequence of phonemes. The number of possible clusters is significantly less than the number of possible combinations of input phonemes. Nodes (510, 511) in the unified clustering tree are arranged into levels such that the clustering tree generates clusters for multiple speech recognition models. Models that correspond to higher levels in the unified clustering tree are coarse models relative to more fine-grain models at lower levels of the clustering tree.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: June 17, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Jayadev Billa, Daniel Kiecza, Francis G. Kubala
  • Self-organizing speech recognition for information extraction
    Patent number: 7389233
    Abstract: A system is provided that trains a speech processing device to recognize any spoken language. The speech processing device is trained by receiving a group of speech frames (302). The group of speech frames is grouped into a group of segments (304). A model of each of the segments is created (306) and the segments are compared (308). The segments are grouped into clusters based on comparisons of the segments (310). A model for each of the clusters is built (312). The built cluster models enable the labeling of segments from speech in the language. Labeled segments (i.e., recognizer output) may be used to train topic classifiers. Speech topics may be classified on the basis of the generated labeled segments.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: June 17, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventors: Herbert Gish, William R. Belfield
  • Systems and methods for communicating in a personal area network
    Patent number: 7386003
    Abstract: A network (100) connects a hub device (110) to several peripheral devices (120). The hub device (110) generates a token and broadcasts the token on the network (100). Each of the peripheral devices (120) receives the token broadcast by the hub device (110), determines whether the token identifies the peripheral device (120), analyzes the token to determine a size and direction of a current data transfer when the token identifies the peripheral device (120), and transfers data to or receives data from the hub device (110) according to the determined size and direction of the current data transfer.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: June 10, 2008
    Assignee: BBN Technologies Corp.
    Inventor: Robert J. Donaghey
  • Computer virus detection and prevention
    Patent number: 7383580
    Abstract: A system (140) prevents the spread of viruses in a network (100). The system (140) receives a hash value from a remote device (130), compares the hash value to a group of hash values associated with data messages including viruses, and generates a first message when the hash value matches one of the group of hash values. The first message instructs the remote device (130) to discard a received data message. The system (140) also generates a second message when the hash value does not match one of the group of hash values. The second message instructs the remote device (130) to forward the received data message to a user of the remote device (130).
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: June 3, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventor: Michael Joseph Frentz
  • Systems and method for compensation of sensor degradation in shooter detection systems
    Patent number: 7372772
    Abstract: Systems and methods for compensation of sensor degradation in multi-shooter detection systems are described. In such systems, shooter position and trajectory can be estimated precisely from the shockwaves produced at the plurality of sensors by the incoming shots. However, sensor positions can shift and the performance of some sensors may degrade for various reasons. To compensate for sensor degradation that may occur over the life of a long-deployed system, the shooter estimation algorithms are dynamically adapted by performing a least-squares regression analysis of the shockwave arrival times to obtain a time residual for each shot, observing multiple shots, and weighting the individual contributions of the sensors as a function of the time residuals for the multiple shots.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: May 13, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Marshall Seth Brinn, James E. Barger, Stephen D. Milligan
  • Systems and methods for efficient packet distribution in an ad hoc network
    Patent number: 7369512
    Abstract: A system provides packet flooding in a network (200) that includes multiple nodes (210). The system may receive a flood packet, select one or more of the nodes (210) as a like number of one or more relays (210), and attach a header to the flood packet. The header may instruct the one or more relays (210) to which of the nodes (210) to send the flood packet. The system may send the flood packet with the attached header to the one or more relays (210). The one or more relays (210) may retransmit the packet such that each of the nodes (210) in the network (200) receives a single copy of the flood packet.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: May 6, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Vladimir Alexandrov Shurbanov, Jason Keith Redi
  • System and method for imaging and tracking contacts within a medium
    Patent number: 7366053
    Abstract: A system for processing one or more detection signals from an acoustic signal detection system to image and track one or more contacts within a medium including a computer configured to receive the detection signal and a computer readable medium operatively coupled to the computer, that is capable of applying an image processing method to one or more images derived from the received one or more detection signals to estimate the kinematic characteristics of the one or more contacts.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: April 29, 2008
    Assignee: BBN Technologies, Corp.
    Inventors: Paul Patrick Audi, Matthew Patrick Daily, Lynne Maria Dillman, Christopher Burbank Lirakis
  • Method and system for mobile location detection using handoff information
    Patent number: 7366492
    Abstract: Methods and systems for mobile station location detection. A mobile station measures signal strength of each of a set of signals associated with the mobile station, then determines whether a number of signals in the set is less than a predetermined threshold. Based on the determination, the mobile station calculates a difference in power between a first and second signal associated with the mobile station. Thereafter, power on a channel corresponding to the mobile station is increased for a predetermined number of frames based on the calculation. The location of the mobile station is determined during the power increase.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: April 29, 2008
    Assignees: Verizon Corporate Services Group Inc., BBN Technologies Corp.
    Inventor: Rajamani Ganesh
  • Extensible satellite communication system
    Patent number: 7366125
    Abstract: A satellite network [100] includes backbone satellites [110]. The backbone satellites [110] act as routers for data units transmitted through network [100]. The backbone satellites [110] communicate with one another through inter-satellite links [111]. The satellite network [100] may further include user satellites [120] and ground stations [140]. The user satellites [120] may communicate with the backbone satellites [110] through omni-directional links [112].
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: April 29, 2008
    Assignee: BBN Technologies Corp.
    Inventor: Brig Barnum Elliott
  • Method and apparatus for eliminating unwanted telephone calls
    Patent number: 7359499
    Abstract: In accordance with the principles of the present invention, unwanted calls may be prevented. In particular, information about a particular destination is stored in a registry at a clearinghouse server located within a network, e.g., the public telephone network. When a call is being made to the destination, it is routed to the clearinghouse server. Identifying information such as caller-id data is retrieved and the registry is searched. If the caller is registered as being approved, the call is forwarded with information indicating that the call is “approved”. If the caller is not registered or is unknown, the call is forwarded with information indicating that call is “unregistered” or “unavailable”. A user at the destination is then able to quickly determine if the call is unwanted.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: April 15, 2008
    Assignees: Verizon Corporate Services Group Inc., Level 3 Communications LLC, BBN Technologies Corp.
    Inventors: Michael Joseph Frentz, Theodore Reed Farrell
  • Methods and systems for passive information discovery using Lomb periodogram processing
    Patent number: 7359966
    Abstract: A system processes communication signals in a network [100, 200]. The system may obtain time of arrival information for chunks of data in the network and construct a signal [410, 420] to represent the time of arrival information. The signal may consist of data that is non-uniformly spaced. The system may process the signal using a Lomb technique to obtain periodicity information [600, 800] about the signal.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 15, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Tushar Saxena, David B. Cousins, Craig Partridge, W. Timothy Strayer