Patents by Inventor Tomas Lagerqvist

Tomas Lagerqvist 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).

  • Publication number: 20190158237
    Abstract: A method performed by a network node for managing transmission of Cell Reference Symbols, CRS, wherein the network node 110 operates one or more cells and the network node 110 is configured to transmit the CRS in a first bandwidth mode. When the network node 110 has identified a cell 130 which is not actively serving any UEs 120, also referred to as an empty cell, the network node 110 applies (302) a reduced CRS bandwidth mode in the first cell 130 in relation to the first bandwidth mode. By applying (302) a reduced CRS bandwidth mode in the empty cell 130, the overall interference of the CRS from the empty cell 130 is reduced, thereby enhancing the performance in cells actively serving UEs 120.
    Type: Application
    Filed: January 22, 2019
    Publication date: May 23, 2019
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Tomas LAGERQVIST, Walter MÜLLER, Christian SKÄRBY
  • Patent number: 10218482
    Abstract: A method performed by a network node for managing transmission of Cell Reference Symbols, CRS, wherein the network node 110 operates one or more cells and the network node 110 is configured to transmit the CRS in a first bandwidthmode. When the network node 110 has identified a cell 130 which is not actively serving any UEs 120, also referred to as an empty cell, the network node 110 applies(302) a reduced CRS bandwidth mode in the first cell 130 in relation to the first bandwidthmode. By applying (302) a reduced CRS bandwidth mode in the empty cell 130, the overall interference of the CRS from the empty cell 130 is reduced, thereby enhancing the performance in cells actively serving UEs 120.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: February 26, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Tomas Lagerqvist, Walter Müller, Christian Skärby
  • Patent number: 10103821
    Abstract: A method performed in a cellular communication network for establishing that a first cell of said network is unable to receive uplink radio signals. The method comprises determining that no indicative radio message has been received from any radio device during a predetermined time period. In view of said determining, requesting a second cell, neighboring the first cell, to instruct at least one radio device, connected to said second cell and able to detect said first cell, to transmit a radio signal. The method may also comprise obtaining information about how to receive the radio signal. The method may also comprise determining that the radio signal was not successfully received by the first cell in accordance with the obtained information.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: October 16, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Magnus Westerberg, Tomas Lagerqvist, Malin Ljungberg
  • Publication number: 20180288711
    Abstract: Method performed by a network node for reducing interference in neighboring cells. The network node operates in a communication network, which is adapted to wirelessly serve a UE via a serving Radio Access, RA, node. The network node obtains a determination of at least one of Reference Signal Received Power, RSRP, and Reference Signal Received Quality, RSRQ, from the serving RA node as received by the UE and a determination of at least one of RSRP and RSRQ from a neighboring RA node as received by the UE, when the UE is connected to the serving RA node. The network node further decides to reduce a transmit power of the serving RA node serving the connected UE, when the determined RSRP and/or RSRQ of the serving RA node is higher than the RSRP and/or RSRQ of the neighboring RA node, in order to reduce the interference in neighboring cells caused by the serving RA node.
    Type: Application
    Filed: October 15, 2015
    Publication date: October 4, 2018
    Inventors: Tomas LAGERQVIST, David BETTER, Peter NORDLUND, Anthony PARAVATI
  • Publication number: 20170331565
    Abstract: A method performed in a cellular communication network for establishing that a first cell of said network is unable to receive uplink radio signals. The method comprises determining that no indicative radio message has been received from any radio device during a predetermined time period. In view of said determining, requesting a second cell, neighbouring the first cell, to instruct at least one radio device, connected to said second cell and able to detect said first cell, to transmit a radio signal. The method may also comprise obtaining information about how to receive the radio signal. The method may also comprise determining that the radio signal was not successfully received by the first cell in accordance with the obtained information.
    Type: Application
    Filed: December 2, 2014
    Publication date: November 16, 2017
    Inventors: Magnus WESTERBERG, Tomas LAGERQVIST, Malin LJUNGBERG
  • Publication number: 20170289925
    Abstract: A method performed by a network node for managing power of Cell Reference Symbols, CRS, wherein the network node operates one or more cells and the network node is configured to transmit the CRS in a first power mode. When the network node identifies a first cell which is not actively serving any UEs, which cell is also referred to as an empty cell, the network node reduces the power of the CRS in the first cell in relation to the first power mode. By reducing the power of the CRS, the overall interference of the CRS from the empty cell is reduced, thereby enhancing the performance in cells actively serving UEs.
    Type: Application
    Filed: August 28, 2014
    Publication date: October 5, 2017
    Inventors: Tomas LAGERQVIST, Christian SKÄRBY, Walter MÜLLER
  • Publication number: 20170288822
    Abstract: A method performed by a network node for managing transmission of Cell Reference Symbols, CRS, wherein the network node 110 operates one or more cells and the network node 110is configured to transmit the CRS in a first bandwidthmode. When the network node 110 has identified a cell 130 which is not actively serving any UEs 120, also referred to as an empty cell, the network node 110 applies(302) a reduced CRS bandwidth mode in the first cell 130 in relation to the first bandwidthmode. By applying (302) a reduced CRS bandwidth mode in the empty cell 130, the overall interference of the CRS from the empty cell 130 is reduced, thereby enhancing the performance in cells actively serving UEs 120.
    Type: Application
    Filed: August 28, 2014
    Publication date: October 5, 2017
    Inventors: Tomas LAGERQVIST, Walter Muller, Christian Skarby
  • Publication number: 20170250786
    Abstract: A method performed by a network node for managing transmission of one or more CRS subframes. The network node identifies if a cell is actively serving a set of UEs. When the cell is actively serving a set of UEs, which set of UEs is configured for DRX the network node sends CRS over the first bandwidth in one or more CRS subframes which are transmitted in the cell during an onDuration interval of the DRX pattern and/or in one or more CRS subframes where system information is sent and/or in one or more CRS subframes where downlink, DL, data is sent. The network node sends CRS over a second bandwidth, in CRS subframes which are not transmitted in the cell during the onDuration interval of the DRX and/or in the one or more CRS subframes except CRS subframes where system information is sent and/or in the one or more CRS subframes except CRS subframes where DL data is sent, which second bandwidth is reduced in relation to the first bandwidth.
    Type: Application
    Filed: July 7, 2015
    Publication date: August 31, 2017
    Inventors: David Better, Tomas Lagerqvist, Peter Nordlund, Anthony Paravati
  • Patent number: 9497760
    Abstract: Methods by a radio unit and related radio units are disclosed which control capacity of baseband processing resources allocated to a radio communication cell. The method includes determining a deadline margin for a prior transmission time interval (TTI) based on a difference between a time when baseband processing of data for transmission completed and a defined deadline time for completion of the baseband processing. The method further includes determining a desired capacity of baseband processing resources to allocate to the radio communication cell for a present TTI, and controlling capacity of baseband processing resources allocated to the radio communication cell for the present TTI based on the deadline margin and the desired capacity.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: November 15, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Peter Johansson, Mats Johansson, Tomas Lagerqvist
  • Publication number: 20160150531
    Abstract: Methods by a radio unit and related radio units are disclosed which control capacity of baseband processing resources allocated to a radio communication cell. The method includes determining a deadline margin for a prior transmission time interval (TTI) based on a difference between a time when baseband processing of data for transmission completed and a defined deadline time for completion of the baseband processing. The method further includes determining a desired capacity of baseband processing resources to allocate to the radio communication cell for a present TTI, and controlling capacity of baseband processing resources allocated to the radio communication cell for the present TTI based on the deadline margin and the desired capacity.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 26, 2016
    Inventors: Peter JOHANSSON, Mats JOHANSSON, Tomas LAGERQVIST
  • Patent number: 8595713
    Abstract: The present invention relates to the operation and maintenance of radio base stations in mobile communication systems. An inventive radio base station, which can be upgraded remotely in a safe way. In one embodiment of the invention, the radio base station comprises a file system comprising different versions of files, so that an old version of a file can be reverted to should problems in the operation of the radio base station occur. In another embodiment of the invention, the radio base station comprises a back-up area in which a copy of the files of the file system are stored. The back-up area is independent of the file system, so that if problems with the files in the file system are detected, the contents of the back-up area can be stored in the file system.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: November 26, 2013
    Assignee: Andrew LLC
    Inventors: Peter Wahlström, Per-Erik Sundvisson, Tomas Lagerqvist
  • Publication number: 20080320464
    Abstract: The present invention relates to the operation and maintenance of radio base stations in mobile communication systems. An inventive radio base station, which can be upgraded remotely in a safe way. In one embodiment of the invention, the radio base station comprises a file system comprising different versions of files, so that an old version of a file can be reverted to should problems in the operation of the radio base station occur In another embodiment of the invention, the radio base station comprises a back-up area in which a copy of the files of the file system are stored. The back-up area is independent of the file system, so that if problems with the files in the file system are detected, the contents of the back-up area can be stored in the file system.
    Type: Application
    Filed: June 21, 2005
    Publication date: December 25, 2008
    Applicant: ANDREW CORPORATION
    Inventors: Peter Wahlstrom, Per-Erik Sundvisson, Tomas Lagerqvist
  • Patent number: 5737695
    Abstract: A method and apparatus for controlling the use of discontinuous transmission in a cellular telephone. The preferred embodiment of the present invention includes a voice activity detector for detecting the presence or absence of speech and an energy detector for measuring the energy level of sound input to a microphone of a cellular telephone during the absence of speech. The present invention also includes a comparator for comparing the measured noise energy level against a threshold value. The determination as to the presence or absence of speech and the output of the comparator are provided to a controller. The controller enables discontinuous transmission when the energy level detected during the absence of speech is less than or equal to the threshold value and disables discontinuous transmission when the measured energy level exceeds the threshold value.
    Type: Grant
    Filed: December 21, 1996
    Date of Patent: April 7, 1998
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Tomas Lagerqvist, Peter Wahlstrom
  • Patent number: 5502713
    Abstract: In a TDMA cellular telephone system, an error concealment method provides parameter interpolation based on soft quality measures that will enhance the speech quality under bad channel conditions compared to prior methods of repeating previous voice data frames. Specifically, the soft technique of the present invention uses a weighted combination of previous and present frame parameters, where the weighting reflects the probability of error. The present invention will improve the masking of errors compared to hard actions based on a binary detection, especially when the binary detection fails or when the received frame is declared as being "good". The method can also utilize parameter based soft information without increasing the bitrate.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: March 26, 1996
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Tomas Lagerqvist, Tor B. Minde, Peter Mustel, Hans Nilsson