Patents by Inventor Leif Axelsson

Leif Axelsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8553560
    Abstract: A system for efficient routing in a multiple hop wireless communication network comprising a plurality of network nodes is presented. The system acquires quality information indicating link status between the infrastructure nodes. The link quality information is used in a route determination process in the infrastructure nodes using a predictive procedure. The link quality information includes information about a time varying information of the link status. The predictive procedure uses the time varying information of link status, and a router data packets according to the determined route.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: October 8, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
  • Patent number: 8218550
    Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The routing method comprise the steps of providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining an appropriate route according to said link status information with respect to traffic content, and routing traffic according to said determined appropriate route.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: July 10, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
  • Patent number: 8036224
    Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The invention is characterized in that data packets are routed over transmission paths using the following steps providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining possible routes with essentially similar link quality status for said data packet, and routing said data packet via the determined routes.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: October 11, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
  • Patent number: 7660287
    Abstract: A method is presented for address resolution mapping in a wireless multihop communication network wherein the network is built up by client devices and/or infrastructure devices, network traffic is based on using ARP forwarding and rebroadcasting to locate devices in such a network architecture. The invention also includes devices for such a network and the complete communication system is described.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: February 9, 2010
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Axelsson, Anders Lundström, Magnus Westbergh
  • Patent number: 7394046
    Abstract: A system for determination of kinematics of a moving object comprising: a sensor producing angular data for the object at a number of observation times, a state initialization unit, receiving angular data from the sensor and on basis thereof determining a first kinematic state of the object, and a tracking filter having a prediction unit, arranged to determine a predicted kinematics state of the object on bases of a kinematic model of the object, wherein the kinematic model comprises a guidance law locked on a known position, and at least one previously determined kinematic state of the object, and a state updating unit, receiving angular data from the sensor and the predicted kinematic state of the object, and on basis thereof determining an updated kinematic state of the object.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: July 1, 2008
    Assignee: SAAB AB
    Inventors: Hakan Olsson, Jan Wallenberg, Leif Axelsson
  • Publication number: 20080137580
    Abstract: A method is presented for address resolution mapping in a wireless multihop communication network wherein the network is built up by client devices and/or infrastructure devices, network traffic is based on using ARP forwarding and rebroadcasting to locate devices in such a network architecture. The invention also includes devices for such a network and the complete communication system is described.
    Type: Application
    Filed: April 5, 2004
    Publication date: June 12, 2008
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Axelsson, Anders Lundstrom, Magnus Westbergh
  • Publication number: 20080128546
    Abstract: A system for determination of kinematics of a moving object comprising: a sensor producing angular data for the object at a number of observation times, a state initialization unit, receiving angular data from the sensor and on basis thereof determining a first kinematic state of the object, and a tracking filter having a prediction unit, arranged to determine a predicted kinematics state of the object on bases of a kinematic model of the object, wherein the kinematic model comprises a guidance law locked on a known position, and at least one previously determined kinematic state of the object, and a state updating unit, receiving angular data from the sensor and the predicted kinematic state of the object, and on basis thereof determining an updated kinematic state of the object.
    Type: Application
    Filed: May 20, 2005
    Publication date: June 5, 2008
    Inventors: Hakan Olsson, Jan Wallenberg, Leif Axelsson
  • Publication number: 20080104274
    Abstract: A naming service in a multihop wireless ad hoc network having a plurality of network nodes. A database in each node stores information associating user information with network information. The stored user information may include user identifications, available services, authority levels of users, and network addresses. When changes occur to user information, network topology information, or network infrastructure information in a given node's database, the naming service automatically updates the databases in other nodes.
    Type: Application
    Filed: December 29, 2004
    Publication date: May 1, 2008
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Axelsson, Henrik Riomar
  • Publication number: 20080037477
    Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The routing method comprise the steps of providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining an appropriate route according to said link status information with respect to traffic content, and routing traffic according to said determined appropriate route.
    Type: Application
    Filed: December 23, 2003
    Publication date: February 14, 2008
    Inventors: Leif Axelsson, Yoshib Honda, Renzo Urabe, Toshikane Oda
  • Publication number: 20070274268
    Abstract: The present invention relates to a system for efficient routing in a multiple hop wireless communication network comprising a plurality of network nodes is presented. The system comprises means (3001) for acquiring quality information indicating link status between said infrastructure nodes, means (3002) for using said link quality information in a route determination process in the infrastructure nodes using a predictive procedure, said link quality information containing information about a time varying information of said link status; and said predictive procedure uses said time varying information of link status in the predictive procedure; and routing means (101) for routing data packets according to a determined route.
    Type: Application
    Filed: December 23, 2003
    Publication date: November 29, 2007
    Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
  • Publication number: 20070274232
    Abstract: A method is presented for neighbor discovery in a wireless multihop packet based communication network using Internet Protocol version 6 (IPv6) wherein the network is built up by client and/or server devices and/or infrastructure devices, network traffic is based on using NDP forwarding and rebroadcasting to locate devices in such a network architecture. The invention also includes devices for such a network and the complete communication system is described.
    Type: Application
    Filed: June 14, 2004
    Publication date: November 29, 2007
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (pub)
    Inventors: Leif Axelsson, Henrik Riomar
  • Publication number: 20070263628
    Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The invention is characterized in that data packets are routed over transmission paths using the following steps providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining possible routes with essentially similar link quality status for said data packet, and routing said data packet via the determined routes.
    Type: Application
    Filed: December 23, 2003
    Publication date: November 15, 2007
    Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
  • Publication number: 20070226247
    Abstract: The present invention relates to a method suitable for, within a platform, merging data from different sensors of different platforms, comprising the steps of: generating a first information entity; receiving a second information entity; processing the first and second information entities. The invention is characterized by the steps of analysing said processed first and second information entities; and performing an action event in response to the analysis.
    Type: Application
    Filed: October 4, 2006
    Publication date: September 27, 2007
    Applicant: SAAB AB
    Inventors: Niklas Ferm, Par Norberg, Leif Axelsson
  • Publication number: 20070162261
    Abstract: Present invention relates to an arrangement, suitable for increasing data association accuracy, comprising means for generating a first data entity comprising a first information set and a second information set about at least one object; and means for generating a second data entity comprising a first information set and second information set about at least one object. The invention is characterized by means for generating at least one distance matrix depending upon the first information sets or the second information sets; means for gating said at least one generated distance matrix, and means for performing an association process depending upon the gated distance matrix.
    Type: Application
    Filed: October 2, 2006
    Publication date: July 12, 2007
    Applicant: SAAB AB
    Inventors: Joakim Notstrand, Ulf Samuelsson, Leif Axelsson
  • Publication number: 20070146195
    Abstract: An avionics system including a radar system being capable of automatically tracking a radar target, an optical image producing system, a radar monitor, an optical image monitor, a decision support unit having a connection to the radar system and to the optical image producing system, and an input/output unit for entering one or more decision parameters. The decision support unit is connected to the input/output unit. During a flight mission the decision support unit receives one or more automatic radar tracking parameters from the radar system, uses the decision parameters on the radar tracking parameters to decide upon which radar target(s) to be subjected to observation by the optical image producing system.
    Type: Application
    Filed: November 9, 2006
    Publication date: June 28, 2007
    Applicant: SAAB AB
    Inventors: Jan Wallenberg, Johan Ivansson, Leif Axelsson