Patents by Inventor Tobias Ahlström

Tobias Ahlström 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: 10820217
    Abstract: The invention describes a method for handling of cell identities, performed by a first radio node of a wireless communication network providing radio coverage to a first cell. The first radio node is connected to at least one second radio node providing radio coverage to a second cell. The first cell has been assigned a first cell identity, and each of the second cells has been assigned an individual cell identity. The method comprises: determining that the first cell identity is the same as the cell identity assigned to one of the second cells; triggering change of cell identity for the first cell from the first cell identity to a second cell identity that is not used for any of the second cells, and sending, to the at least one second radio node, information on the change of cell identity from the first cell identity to the second cell identity.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: October 27, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Daniel Henriksson, Tobias Ahlström, Stefan Engström
  • Publication number: 20200092738
    Abstract: A wireless device (111) is configured to receive, from a network node (101), in a measurement reporting configuration information element (127) of a measurement configuration or a measurement identity information element (129) of a measurement configuration, an indication (128) of for which cell the wireless device (111) (111) is to report a cell global identifier, CGI. In embodiments in which the indication (128) is received in the measurement reporting configuration information element (127), for instance, the wireless device (111) may add a reporting configuration indicated by that information element to a list of reporting configurations at the wireless device (111), e.g., as opposed to updating an existing reporting configuration. Regardless, the wireless device (111) may also be configured to report a CGI for the cell indicated by the received indication (128).
    Type: Application
    Filed: November 16, 2018
    Publication date: March 19, 2020
    Inventors: Tobias Ahlström, Icaro L. J. da Silva, Helka-Liina Määttanen, Parisa Pakniat, Kristina Zetterberg
  • Publication number: 20190230530
    Abstract: Disclosed is a method for handling of cell identities, performed by a first radio node of a wireless communication network providing radio coverage to a first cell. The first radio node is connected to at least one second radio node providing radio coverage to a second cell. The first cell has been assigned a first cell identity, and each of the second cells has been assigned an individual cell identity. The method comprises: determining, based on information on the first cell identity and on the cell identities assigned to the second cells, that the first cell identity is the same as the cell identity assigned to one of the second cells; triggering change of cell identity for the first cell, based on the result of the determining, from the first cell identity to a second cell identity that is not used for any of the second cells, and sending, to the at least one second radio node, information on the change of cell identity from the first cell identity to the second cell identity.
    Type: Application
    Filed: October 28, 2016
    Publication date: July 25, 2019
    Inventors: Daniel HENRIKSSON, Tobias AHLSTRÖM, Stefan ENGSTRÖM
  • Patent number: 10222451
    Abstract: Disclosed is a method performed by a position calculation node (160) in a wireless communication network (100). The node (160) is arranged for improving accuracy when determining positions in the wireless communication network. The method comprises obtaining a signal transport time value for each of a plurality of different geographical UE positions (UE1, UE2, UE3), wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions. The method further comprises obtaining a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values, and determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: March 5, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Daniel Henriksson, Tobias Ahlström, Kenneth Balck, Markus Drevö
  • Patent number: 10097401
    Abstract: A technique of providing performance management (PM) data by a network element of a wireless network to an Operations and Maintenance, OAM, system to which the network element is connected. A method embodiment of the providing PM data to the OAM system to which the network element is connected, the PM data being related to one or more objects associated with the network element, includes determining, by the network element, whether at least one of the one or more objects is an unmirrored object, the unmirrored object being invisible to the OAM system. If at least one of the one or more objects is an unmirrored object, the method accumulates, by the network element, PM data of the at least one unmirrored object with PM data of further objects associated with the network element; and provides, by the network element, the accumulated PM data to the OAM system.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: October 9, 2018
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Engström, Tobias Ahlström
  • Patent number: 9900836
    Abstract: A method in a radio network node for selecting a second SCell of a wireless device. The radio network node sends (201) data to a network node, upon a request to release the wireless device from a first connected state, in which the wireless device is connected to a first PCell and configured with a first SCell. The data indicates the first PCell and the first SCell. The radio network node retrieves (202) the sent data when the wireless device enters a second connected state. Then, the wireless device is connected to a second PCell. The radio network node compares (203) the second PCell with the first PCell and the first SCell. When the second PCell is the same as one of the first PCell and the first SCell, the radio network node selects (204) as the second SCell the other of the first SCell and the first PCell.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: February 20, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rasmus Axén, Tobias Ahlström, Tobias Ljungström
  • Publication number: 20170269190
    Abstract: Disclosed is a method performed by a position calculation node (160) in a wireless communication network (100). The node (160) is arranged for improving accuracy when determining positions in the wireless communication network. The method comprises obtaining a signal transport time value for each of a plurality of different geographical UE positions (UE1, UE2, UE3), wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions. The method further comprises obtaining a geographical position value for each of the plurality of different geo-graphical UE positions, the position values being independent of the signal transport time values, and determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station.
    Type: Application
    Filed: December 4, 2014
    Publication date: September 21, 2017
    Inventors: Daniel Henriksson, Tobias Ahlström, Kenneth Balck, Markus Drevö
  • Publication number: 20170127299
    Abstract: A method in a first radio network node for updating external cell information is provided. The external cell information relates to a first cell served by a second radio network node. The first radio network node determines that there is a need to update the external cell information. The first radio network node sends a first message to the second radio network node. The first message comprises a request for data representing information relating to the first cell. The first radio network node receives a second message from the second radio network node. The second message comprises the requested data. The first radio network node updates the external cell information based on the received data.
    Type: Application
    Filed: June 17, 2014
    Publication date: May 4, 2017
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan ENGSTRÖM, Tobias AHLSTRÖM
  • Publication number: 20170099633
    Abstract: A method in a radio network node for selecting a second SCell of a wireless device. The radio network node sends (201) data to a network node, upon a request to release the wireless device from a first connected state, in which the wireless device is connected to a first PCell and configured with a first SCell. The data indicates the first PCell and the first SCell. The radio network node retrieves (202) the sent data when the wireless device enters a second connected state. Then, the wireless device is connected to a second PCell. The radio network node compares (203) the second PCell with the first PCell and the first SCell. When the second PCell is the same as one of the first PCell and the first SCell, the radio network node selects (204) as the second SCell the other of the first SCell and the first PCell.
    Type: Application
    Filed: March 14, 2014
    Publication date: April 6, 2017
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Rasmus AXÉN, Tobias AHLSTRÖM, Tobias LJUNGSTRÖM
  • Publication number: 20160269947
    Abstract: A wireless device for a cellular network comprises a receiver arranged to receive a request to report at least one second network cell suitable for handover, a processor arranged to determine the at least one second network cell suitable for handover among a set of available network cells and to form a response comprising a respective local cell identity associated with the at least one suitable second network cell, and a transmitter arranged to transmit the formed response. The processor is further arranged to determine a cell identity confusion risk involved for the set of available network cells based on information in the request and based on local cell identities associated with the set of available network cells, and measure a global cell identity for each at least one second network cell determined to be involved in a cell identity confusion risk.
    Type: Application
    Filed: November 1, 2013
    Publication date: September 15, 2016
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Elisabeth HANSSON, Tobias AHLSTRÖM, Stefan ENGSTRÖM
  • Patent number: 9398478
    Abstract: Embodiments herein relate to a method in a first radio base station (12) for enabling detection of a faulty antenna in a radio communications network. The radio communication network comprises the first radio base station (12) providing radio coverage in a first cell (14), and a second radio base station (13) providing radio coverage in a second cell (15). The first radio base station (12) receives, from at least one user equipment in the first cell (14), a first set of measurement reports over a first period of time. At least some measurement reports are indicating a cell relation between the first cell (14) and the second cell (15). The first radio base station (12) further forms reference statistics of the cell relation between the first cell (14) and the second cell (15) based on the first set of measurement reports. Furthermore, the first radio base station (12) receives, from at least one user equipment in the first cell (14), a second set of measurement reports over a second period of time.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: July 19, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Tobias Ahlström, Petter Bergman
  • Publication number: 20160156500
    Abstract: A technique of providing performance management (PM) data by a network element of a wireless network to an Operations and Maintenance, OAM, system to which the network element is connected. A method embodiment of the providing PM data to the OAM system to which the network element is connected, the PM data being related to one or more objects associated with the network element, includes determining, by the network element, whether at least one of the one or more objects is an unmirrored object, the unmirrored object being invisible to the OAM system. If at least one of the one or more objects is an unmirrored object, the method accumulates, by the network element, PM data of the at least one unmirrored object with PM data of further objects associated with the network element; and provides, by the network element, the accumulated PM data to the OAM system.
    Type: Application
    Filed: July 1, 2014
    Publication date: June 2, 2016
    Inventors: Stefan ENGSTRÖM, Tobias AHLSTRÖM
  • Patent number: 9357454
    Abstract: Methods, user equipment (120) and target base station (130) for supporting update of neighbor cell relations in a cellular communications network (100). The user equipment (120) switches from being served in the source cell (115) by the source base station (110) to instead being served in the target cell (135) by the target base station. The user equipment sends (304, 403), to the target base station (130), in association with the switching, an identifier of the source cell (115) in the cellular communications network (100) and a request for mobility report. The request for mobility report requests the target base station (130) to send a mobility report to the source base station (110) or a management entity (140) thereof. The mobility report reporting that a successful switch has taken place between the source cell (115) and the target cell (135), thereby enabling updating of the neighbor cell relations based on the mobility report.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: May 31, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Elisabeth Hansson, Tobias Ahlström, Stefan Engström, Johan Moe
  • Publication number: 20150172975
    Abstract: A controlling node (225) for a first cell (227) in a cellular network (200), arranged to receive measurement reports from User Equipments, UEs (230, 255), in the first cell (227) on the signal strength and/or signal quality of transmissions from the controlling nodes of neighboring cells (217), and to maintain a list of neighboring cells based on such measurement reports. The list shows how many of the UEs (230, 255) in the first cell (227) that each of said neighboring cell's (217) controlling node “covers”, i.e. reaches with a signal strength and/or signal quality above a certain level. The controlling node is also arranged to decide to perform blind handover or release with redirect on one of the UEs in the first cell, and to choose one or more of the cells in the list as the target cell or cells for blind handover or release with redirect.
    Type: Application
    Filed: June 7, 2012
    Publication date: June 18, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Elisabeth Hansson, Tobias Ahlström, Stefan Engström, Johan Moe
  • Publication number: 20150148042
    Abstract: Methods, user equipment (120) and target base station (130) for supporting update of neighbour cell relations in a cellular communications network (100). The user equipment (120) switches from being served in the source cell (115) by the source base station (110) to instead being served in the target cell (135) by the target base station. The user equipment sends (304, 403), to the target base station (130), in association with the switching, an identifier of the source cell (115) in the cellular communications network (100) and a request for mobility report. The request for mobility report requests the target base station (130) to send a mobility report to the source base station (110) or a management entity (140) thereof. The mobility report reporting that a successful switch has taken place between the source cell (115) and the target cell (135), thereby enabling updating of the neighbour cell relations based on the mobility report.
    Type: Application
    Filed: July 10, 2012
    Publication date: May 28, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Elisabeth Hansson, Tobias Ahlström, Stefan Engström, Johan Moe
  • Publication number: 20140194113
    Abstract: Embodiments herein relate to a method in a first radio base station (12) for enabling detection of a faulty antenna in a radio communications network. The radio communication network comprises the first radio base station (12) providing radio coverage in a first cell (14), and a second radio base station (13) providing radio coverage in a second cell (15). The first radio base station (12) receives, from at least one user equipment in the first cell (14), a first set of measurement reports over a first period of time. At least some measurement reports are indicating a cell relation between the first cell (14) and the second cell (15). The first radio base station (12) further forms reference statistics of the cell relation between the first cell (14) and the second cell (15) based on the first set of measurement reports. Furthermore, the first radio base station (12) receives, from at least one user equipment in the first cell (14), a second set of measurement reports over a second period of time.
    Type: Application
    Filed: July 22, 2011
    Publication date: July 10, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Tobias Ahlström, Petter Bergman