Patents by Inventor Mats Fredrik Sågfors

Mats Fredrik Sågfors 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: 10595290
    Abstract: A procedure for synchronization of re-configuration of RRC procedures between the radio base station and the UE is achieved by associating a new configuration to be used by a UE with an additional UE identity. The UE is normally identified by a first UE identity, but is informed in a re-configuration message that the UE also has the additional UE identity. The UE is identified by the additional UE identity when the new configuration is to be activated. Hence, when the radio base station detects that the UE responds to requests, which included the additional UE identity, the radio base station can conclude that the UE has activated the new configuration.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: March 17, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mats Fredrik Sågfors, Magnus Johansson, George Jöngren, Magnus Stattin, Per Johan Torsner
  • Patent number: 10187837
    Abstract: A mobile station is configured to support handover from a source base station to a target base station. The mobile station receives signaling from the target base station that indicates Packet Data Convergence Protocol (PDCP) protocol data units which have been successfully received at the target base station. In response, the mobile station generates further PDCP protocol data units for missing PDCP service data units from corresponding PDCP service data units buffered at the mobile station. The generating comprises using a different header compression state from that which was used for the missing PDCP service data units and ciphering specific to a connection with the target base station. The mobile station transmits the further PDCP protocol data units to the target base station.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: January 22, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Publication number: 20180263005
    Abstract: A procedure for synchronization of re-configuration of RRC procedures between the radio base station and the UE is achieved by associating a new configuration to be used by a UE with an additional UE identity. The UE is normally identified by a first UE identity, but is informed in a re-configuration message that the UE also has the additional UE identity. The UE is identified by the additional UE identity when the new configuration is to be activated. Hence, when the radio base station detects that the UE responds to requests, which included the additional UE identity, the radio base station can conclude that the UE has activated the new configuration.
    Type: Application
    Filed: May 14, 2018
    Publication date: September 13, 2018
    Inventors: Mats Fredrik Sågfors, Magnus Johansson, George Jöngren, Magnus Stattin, Per Johan Torsner
  • Patent number: 9974034
    Abstract: A procedure for synchronization of re-configuration of RRC procedures between the radio base station and the UE is achieved by associating a new configuration to be used by a UE with an additional UE identity. The UE is normally identified by a first UE identity, but is informed in a re-configuration message that the UE also has the additional UE identity. The UE is identified by the additional UE identity when the new configuration is to be activated. Hence, when the radio base station detects that the UE responds to requests, which included the additional UE identity, the radio base station can conclude that the UE has activated the new configuration.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: May 15, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mats Fredrik Sågfors, Magnus Johansson, George Jöngren, Magnus Stattin, Per Johan Torsner
  • Publication number: 20180123740
    Abstract: A user equipment unit (30) and a base station node (28) which is configured for operation with a synchronous HARQ protocol and with capability of sending data on an E-DCH channel either (1) in a nominal mode in single transmission time intervals of a predetermined length, or (2) in an extended mode in a pseudo transmission time interval. The pseudo transmission time interval comprises a first transmission time interval in which the data is transmitted and a second transmission time interval in which the data is re-transmitted. The second transmission time interval is consecutive to the first transmission time interval, and the first transmission time interval and the second transmission time interval are each of the (same) predetermined length.
    Type: Application
    Filed: December 19, 2017
    Publication date: May 3, 2018
    Inventors: Per Johan TORSNER, Eva ENGLUND, Stefan PARKVALL, Mats Fredrik SÅGFORS
  • Publication number: 20180098257
    Abstract: A mobile station is configured to support handover from a source base station to a target base station. The mobile station receives signaling from the target base station that indicates Packet Data Convergence Protocol (PDCP) protocol data units which have been successfully received at the target base station. In response, the mobile station generates further PDCP protocol data units for missing PDCP service data units from corresponding PDCP service data units buffered at the mobile station. The generating comprises using a different header compression state from that which was used for the missing PDCP service data units and ciphering specific to a connection with the target base station. The mobile station transmits the further PDCP protocol data units to the target base station.
    Type: Application
    Filed: December 5, 2017
    Publication date: April 5, 2018
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Patent number: 9918307
    Abstract: UTRAN MAC-d multiplexing of data from multiple logical channels to a single MAC-d flow is supported while reducing overhead and achieving octet alignment in MAC-d PDU length. In one embodiment, the C/T field of a multiplexed MAC-d PDU is eliminated, and the logical channels multiplexed into the MAC-d flow are mapped to a MAC-hs PQ in at least the NodeB (and preferably in the UE as well). In other embodiments, the C/T field is retained, and an octet-aligned length indicator is transmitted from the RNC to the UE. In one embodiment, the length indicator is octet-aligned by padding the MAC-d PDUs. In another embodiment, transmitters and receivers in the path from RNC to UE are configured with an offset to add to the length indicator to achieve octet alignment. The padding or offset is (8?n) bits, where n=the number of bits in C/T field.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: March 13, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Anna Larmo, Stefan Henrik Wager, Janne Peisa, Per Johan Torsner, Mats Fredrik Sågfors
  • Patent number: 9877252
    Abstract: A mobile station in a Long Term Evolution (LTE) communication network transmits Packet Data Convergence Protocol (PDCP) protocol data units to a base station and the base station transfers corresponding PDCP service data units to a core network. The mobile station is configured to support handover from a source base station to a target base station. The mobile station generates new PDCP protocol data units for missing PDCP service data units, and transmits the new PDCP protocol data units to the target base station, responsive to signaling from the target base station that indicates which PDCP service data units have been successfully received at the target base station. The new PDCP protocol data units are generated using ciphering specific to the connection with the target base station, from corresponding PDCP service data units buffered at the mobile station.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: January 23, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Publication number: 20160360459
    Abstract: A mobile station in a Long Term Evolution (LTE) communication network transmits Packet Data Convergence Protocol (PDCP) protocol data units to a base station and the base station transfers corresponding PDCP service data units to a core network. The mobile station is configured to support handover from a source base station to a target base station. The mobile station generates new PDCP protocol data units for missing PDCP service data units, and transmits the new PDCP protocol data units to the target base station, responsive to signaling from the target base station that indicates which PDCP service data units have been successfully received at the target base station. The new PDCP protocol data units are generated using ciphering specific to the connection with the target base station, from corresponding PDCP service data units buffered at the mobile station.
    Type: Application
    Filed: August 5, 2016
    Publication date: December 8, 2016
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Patent number: 9426710
    Abstract: In a wireless communication network where base stations receive protocol data units (PDUs) from mobile stations for decompression and deciphering for ordered, sequential transfer as service data units (SDUs) to an associated core network, the teachings presented herein provide a method of supporting seamless handover of a mobile station from a source base station to a target base station. By way of example, the teachings herein apply to a network based on the E-UTRA specifications, as promulgated by the 3GPP. However, that example is non-limiting, as the teachings herein apply to any network that employs in-sequence data delivery and duplicate data detection at handover. Broadly, the source base station forwards out-of-sequence SDUs and corresponding sequence number information to the target base station in support of seamless handover, and the target base station uses that information to request retransmissions as needed for packet reordering.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: August 23, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Publication number: 20160234814
    Abstract: UTRAN MAC-d multiplexing of data from multiple logical channels to a single MAC-d flow is supported while reducing overhead and achieving octet alignment in MAC-d PDU length. In one embodiment, the C/T field of a multiplexed MAC-d PDU is eliminated, and the logical channels multiplexed into the MAC-d flow are mapped to a MAC-hs PQ in at least the NodeB (and preferably in the UE as well). In other embodiments, the C/T field is retained, and an octet-aligned length indicator is transmitted from the RNC to the UE. In one embodiment, the length indicator is octet-aligned by padding the MAC-d PDUs. In another embodiment, transmitters and receivers in the path from RNC to UE are configured with an offset to add to the length indicator to achieve octet alignment. The padding or offset is (8?n) bits, where n=the number of bits in C/T field.
    Type: Application
    Filed: April 15, 2016
    Publication date: August 11, 2016
    Inventors: Anna Larmo, Stefan Henrik Wager, Janne Peisa, Per Johan Torsner, Mats Fredrik Sågfors
  • Patent number: 9386596
    Abstract: A packet service enhancement mode (60) and packet service enhancer (35) is provided for operating a packet channel (25) existing over an air interface (27) between a base station node and a user equipment unit of a telecommunications network. As one aspect of the technology, a packet service enhancement method comprises performing a monitoring of a radio link connection carried by the packet channel and, in accordance with the monitoring, both modifying an operational parameter for the packet channel and dropping non-consecutive packets from the packet channel.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: July 5, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Janne Peisa, Håkan Olofsson, Mats Fredrik Sågfors, Per Synnergren
  • Patent number: 9100161
    Abstract: A method is described for data transmission by user equipments adapted to transmit data using resource blocks allocated by a radio network. The radio network is adapted to allocate resource blocks to a dedicated one of the user equipments or to a plurality of the user equipments. The method comprises the step of allocating at least one of the resource blocks that is not allocated to any dedicated user equipment to a first plurality of the user equipments. The allocation is signaled to the user equipments. A first user equipment of said first plurality obtains data for transmission. At least a first part of the data is transmitted by the first user equipment using said at least one resource block. Devices embodying the invention and methods of operating the devices are also described.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 4, 2015
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Wager, Michael Meyer, Mats Fredrik Sågfors, Henning Wiemann
  • Patent number: 8989087
    Abstract: A method for managing radio access comprises sending of a radio access technology (RAT) resource aggregation request from a first radio access network (RAN) to a second RAN concerning communication with a user equipment connected to a source RAN, and returning a response to the first RAN. The source RAN is the first or second RAN. The first and second RANs use different radio access technologies. Radio resources of a base station in a target RAN, the RAN to which the user equipment is not connected, are reserved. A report of the reserved radio resources is sent to the source RAN. A RAT resource aggregation command is transmitted to the user equipment. The RAT resource aggregation command comprises that a RAT resource aggregation shall be used and the reserved radio resources. The base stations have at least partly overlapping coverage areas.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: March 24, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Bengt Lindoff, Gunnar Mildh, Stefan Parkvall, Mats Fredrik Sågfors
  • Publication number: 20150016402
    Abstract: A method is described for data transmission by user equipments adapted to transmit data using resource blocks allocated by a radio network. The radio network is adapted to allocate resource blocks to a dedicated one of the user equipments or to a plurality of the user equipments. The method comprises the step of allocating at least one of the resource blocks that is not allocated to any dedicated user equipment to a first plurality of the user equipments. The allocation is signaled to the user equipments. A first user equipment of said first plurality obtains data for transmission. At least a first part of the data is transmitted by the first user equipment using said at least one resource block. Devices embodying the invention and methods of operating the devices are also described.
    Type: Application
    Filed: September 30, 2014
    Publication date: January 15, 2015
    Inventors: Stefan Wager, Michael Meyer, Mats Fredrik Sågfors, Henning Wiemann
  • Publication number: 20140369314
    Abstract: In a wireless communication network where base stations receive protocol data units (PDUs) from mobile stations for decompression and deciphering for ordered, sequential transfer as service data units (SDUs) to an associated core network, the teachings presented herein provide a method of supporting seamless handover of a mobile station from a source base station to a target base station. By way of example, the teachings herein apply to a network based on the E-UTRA specifications, as promulgated by the 3GPP. However, that example is non-limiting, as the teachings herein apply to any network that employs in-sequence data delivery and duplicate data detection at handover. Broadly, the source base station forwards out-of-sequence SDUs and corresponding sequence number information to the target base station in support of seamless handover, and the target base station uses that information to request retransmissions as needed for packet reordering.
    Type: Application
    Filed: July 25, 2014
    Publication date: December 18, 2014
    Inventors: Magnus Stattin, Michael Meyer, Janne Peisa, Ghyslain Pelletier, Mats Fredrik Sågfors, Per Johan Torsner, Henning Wiemann
  • Patent number: 8861449
    Abstract: A method is described for data transmission by user equipments adapted to transmit data using resource blocks allocated by a radio network. The radio network is adapted to allocate resource blocks to a dedicated one of the user equipments or to a plurality of the user equipments. The method comprises the step of allocating at least one of the resource blocks that is not allocated to any dedicated user equipment to a first plurality of the user equipments. The allocation is signaled to the user equipments. A first user equipment of said first plurality obtains data for transmission. At least a first part of the data is transmitted by the first user equipment using said at least one resource block. Devices embodying the invention and methods of operating the devices are also described. Contention based data transmission in uplink is enabled without previous scheduling request and scheduling grant.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: October 14, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Stefan Wager, Michael Meyer, Mats Fredrik Sågfors, Henning Wiemann
  • Patent number: 8812006
    Abstract: The present invention relates to methods and arrangements in a wireless communication system supporting carrier aggregation and comprising a radio base station configured to broadcast system information in at least two cells. The method for the user equipment comprises receiving configuration information for an aggregation of the at least two cells from the radio base station, identifying a first of the at least two cells based on a configuration rule stating that the first of the at least two cells has a status that is different from the status of the remaining cells, and reading the broadcasted system information only in the identified cell. The method may also comprise obeying one or more parameters obtained from the read system information.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: August 19, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Mats Fredrik Sågfors, Robert Baldemair, Magnus Lindström
  • Patent number: 8804616
    Abstract: A signaling mechanism informs a Radio Network Controller of the radio access technology associated with data packets forwarded to the Radio Network Controller from base stations supporting multiple radio access technologies. With this information, the Radio Network Controller can associate received data with the corresponding radio access technologies, and thus manage differing physical layer procedures, such as outer-loop power control, for the radio access technologies. In an example method, first and second data units transmitted by a mobile station over first and second radio access technologies, respectively, are forwarded from one or more base stations to a network control node for further processing. A control message associated with at least some of the data units is also sent to the network control node, the control message indicating the radio access technology over which the associated data units were transmitted.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: August 12, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stephen J. Grant, Stefan Parkvall, Mats Fredrik Sågfors
  • Publication number: 20140044079
    Abstract: A procedure for synchronization of re-configuration of RRC procedures between the radio base station and the UE is achieved by associating a new configuration to be used by a UE with an additional UE identity. The UE is normally identified by a first UE identity, but is informed in a re-configuration message that the UE also has the additional UE identity. The UE is identified by the additional UE identity when the new configuration is to be activated. Hence, when the radio base station detects that the UE responds to requests, which included the additional UE identity, the radio base station can conclude that the UE has activated the new configuration.
    Type: Application
    Filed: October 16, 2013
    Publication date: February 13, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Mats Fredrik Sågfors, Magnus Johansson, George Jöngren, Magnus Stattin, Per Johan Torsner