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).
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Patent number: 8553560Abstract: 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: GrantFiled: December 23, 2003Date of Patent: October 8, 2013Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
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Patent number: 8218550Abstract: 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: GrantFiled: December 23, 2003Date of Patent: July 10, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
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Patent number: 8036224Abstract: 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: GrantFiled: December 23, 2003Date of Patent: October 11, 2011Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
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Patent number: 7660287Abstract: 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: GrantFiled: April 5, 2004Date of Patent: February 9, 2010Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Axelsson, Anders Lundström, Magnus Westbergh
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Patent number: 7394046Abstract: 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: GrantFiled: May 20, 2005Date of Patent: July 1, 2008Assignee: SAAB ABInventors: Hakan Olsson, Jan Wallenberg, Leif Axelsson
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Publication number: 20080137580Abstract: 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: ApplicationFiled: April 5, 2004Publication date: June 12, 2008Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Leif Axelsson, Anders Lundstrom, Magnus Westbergh
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Publication number: 20080128546Abstract: 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: ApplicationFiled: May 20, 2005Publication date: June 5, 2008Inventors: Hakan Olsson, Jan Wallenberg, Leif Axelsson
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Publication number: 20080104274Abstract: 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: ApplicationFiled: December 29, 2004Publication date: May 1, 2008Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Leif Axelsson, Henrik Riomar
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Publication number: 20080037477Abstract: 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: ApplicationFiled: December 23, 2003Publication date: February 14, 2008Inventors: Leif Axelsson, Yoshib Honda, Renzo Urabe, Toshikane Oda
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Publication number: 20070274268Abstract: 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: ApplicationFiled: December 23, 2003Publication date: November 29, 2007Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
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Publication number: 20070274232Abstract: 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: ApplicationFiled: June 14, 2004Publication date: November 29, 2007Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (pub)Inventors: Leif Axelsson, Henrik Riomar
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Publication number: 20070263628Abstract: 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: ApplicationFiled: December 23, 2003Publication date: November 15, 2007Inventors: Leif Axelsson, Yoshio Honda, Kenzo Urabe, Toshikane Oda
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Publication number: 20070226247Abstract: 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: ApplicationFiled: October 4, 2006Publication date: September 27, 2007Applicant: SAAB ABInventors: Niklas Ferm, Par Norberg, Leif Axelsson
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Publication number: 20070162261Abstract: 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: ApplicationFiled: October 2, 2006Publication date: July 12, 2007Applicant: SAAB ABInventors: Joakim Notstrand, Ulf Samuelsson, Leif Axelsson
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Publication number: 20070146195Abstract: 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: ApplicationFiled: November 9, 2006Publication date: June 28, 2007Applicant: SAAB ABInventors: Jan Wallenberg, Johan Ivansson, Leif Axelsson