Patents by Inventor Klas Johansson

Klas Johansson 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: 20220018065
    Abstract: The present invention relates to a method of producing holocellulose fibres by treating a wood-based raw material with an organic peroxide, wherein the method comprises charging the organic peroxide continuously to the wood-based raw material during the treatment and/or charging the organic peroxide to the wood-based raw material in at least two separate steps with an intermediate alkaline treatment step. Additionally, a process for the production of paper comprising the steps of preparing a papermaking stock comprising an aqueous pulp slurry comprising cellulosic fibres and having a fibre consistency of from 0.1 to 40% by weight, wherein the cellulosic fibres comprise or consist of holocellulose fibres, and wherein the amount of the wood-based holocellulose fibres is from 0.5 to 100% by weight, based on the total weight of the stock; providing the stock to a wire and form a web; dewatering the web; and drying the web is claimed.
    Type: Application
    Filed: November 15, 2019
    Publication date: January 20, 2022
    Inventors: Paul KROCHAK, Klas JOHANSSON, Fredrik BERTHOLD, Eric JOHANSSON SALAZAR-SANDOVAL, Erika TÖNNERFORS, Frédéric POUYET
  • Patent number: 9894664
    Abstract: A radio base station and a method therein for scheduling an uplink radio resource to a first user equipment in a wireless communication system which employs CDMA are provided. The method includes measuring an Interference Suppression (IS) gain for each user equipment in a set of user equipments currently being served by the radio base station. The method further includes determining a user constellation pertaining to information regarding the different user equipments in the set of user equipments and their respective bitrates, and updating a table of IS gains with the measured IS gain in bins corresponding to the determined user constellation. The method further includes predicting a load based on at least the updated table, and scheduling the uplink radio resource to the first user equipment at least partly based on the predicted load.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: February 13, 2018
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Torbjörn Wigren, Klas Johansson, Erik Geijer Lundin, Anders Lamm
  • Patent number: 9801091
    Abstract: The present invention discloses schemes to perform load control taking uplink BLER statistics into account. An uplink load control method and apparatus are provided in a wireless communication system. The uplink load control method comprises estimating uplink load budget in a cell of the wireless communication system; determining whether the cell is over-loaded based on Block Error Rate (BLER) statistics of non-Guarded Bit Rate (non-GBR) users in the cell and/or Fast Congestion Control (FCC) action statistics in the cell; decreasing the uplink load budget if it is determined that the cell is over-loaded; and increasing the uplink load budget if it is determined that the cell is not over-loaded. Preferably, increasing or decreasing of the uplink load budget is based on the BLER stastics BLERstatistic of targeted users by FCC.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: October 24, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jinhua Liu, Zhang Zhang, Mats Blomgren, Klas Johansson
  • Publication number: 20170280466
    Abstract: A radio base station and a method therein for scheduling an uplink radio resource to a first user equipment in a wireless communication system which employs CDMA are provided. The method includes measuring an Interference Suppression (IS) gain for each user equipment in a set of user equipments currently being served by the radio base station. The method further includes determining a user constellation pertaining to information regarding the different user equipments in the set of user equipments and their respective bitrates, and updating a table of IS gains with the measured IS gain in bins corresponding to the determined user constellation. The method further includes predicting a load based on at least the updated table, and scheduling the uplink radio resource to the first user equipment at least partly based on the predicted load.
    Type: Application
    Filed: November 30, 2011
    Publication date: September 28, 2017
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Torbjörn Wigren, Klas Johansson, Erik Geijer Lundin, Anders Lamm
  • Patent number: 9544834
    Abstract: A method in a first radio network controller, RNC, (105, 405) for handling a reuse of a scrambling code in a cellular network (100) is provided. The first RNC (105, 405) defines a set of scrambling codes. Each scrambling code in the defined set is locally reused by at least two cells in the cellular network (100). The first RNC (105, 405) receives a measurement report from a user equipment (180). The measurement report is related to a scrambling code that is comprised in the defined set of scrambling codes. The first RNC (105, 405) determines that the reported scrambling code is comprised in the defined set of scrambling codes. The first RNC (105, 405) initiates, based on the determination, a process for identifying, among the at least two cells in which the reported scrambling code is locally reused, an originating cell from which the reported scrambling code originates.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: January 10, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Fredrik Gunnarsson, Klas Johansson
  • Patent number: 9398595
    Abstract: A method in at least one radio network node for handling earner selection comprises measuring at least one of interference or load levels on at least two uplink carriers, said measurement being performed in at least one sector of each carrier, calculating an offset based on said measured Interference or said measured load levels on the at least two uplink carriers, said offset reflecting the interference or load difference between the uplink carriers, and signaling said offset to a communication device, thereby allowing said communication device to base its carrier selection for random access at least on said measured interference or load levels on said at least two uplink carriers.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: July 19, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Fredrik Gunnarsson, Klas Johansson, Torbjörn Wigren
  • Patent number: 9220071
    Abstract: A method for power control stabilization in the uplink of a cellular CDMA communication system applying a fast inner loop power control comprises determining (210) of a radio frame based RoT value for a cell. A radio frame based SINR is determined (212) for individual UEs in the cell. The RoT value is compared (214) with a first threshold. Each frame based SINRs is compared (218) with a second threshold. The fast inner loop power control for a UE is broken (220) in dependence of the comparisons. The breaking comprises commanding (222) of a first number of consecutive power down commands to UEs having the frame based SINR above the second threshold for a RoT value above the first threshold and toggling (224) of power control commands for the subset of UEs during a second number of radio frames for a RoT value above the first threshold.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: December 22, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Torbjörn Wigren, Klas Johansson, Anders Lamm, Magnus Persson, Liina Savolainen
  • Publication number: 20150156707
    Abstract: A method in a first radio network controller, RNC, (105, 405) for handling a reuse of a scrambling code in a cellular network (100) is provided. The first RNC (105, 405) defines a set of scrambling codes. Each scrambling code in the defined set is locally reused by at least two cells in the cellular network (100). The first RNC (105, 405) receives a measurement report from a user equipment (180). The measurement report is related to a scrambling code that is comprised in the defined set of scrambling codes. The first RNC (105, 405) determines that the reported scrambling code is comprised in the defined set of scrambling codes. The first RNC (105, 405) initiates, based on the determination, a process for identifying, among the at least two cells in which the reported scrambling code is locally reused, an originating cell from which the reported scrambling code originates.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 4, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Fredrik Gunnarsson, Klas Johansson
  • Publication number: 20140334455
    Abstract: A radio base station and a method therein for scheduling an uplink radio resource to a first user equipment in a wireless communication system which employs CDMA are provided. The method includes measuring an Interference Suppression (IS) gain for each user equipment in a set of user equipments currently being served by the radio base station. The method further includes determining a user constellation pertaining to information regarding the different user equipments in the set of user equipments and their respective bitrates, and updating a table of IS gains with the measured IS gain in bins corresponding to the determined user constellation. The method further includes predicting a load based on at least the updated table, and scheduling the uplink radio resource to the first user equipment at least partly based on the predicted load.
    Type: Application
    Filed: November 30, 2011
    Publication date: November 13, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Torbjörn Wigren, Klas Johansson, Erik Geijer Lundin, Anders Lamm
  • Publication number: 20140329533
    Abstract: A radio access network (20) comprises a serving base station (28S) configured to control a serving cell (34S) in an active set of a wireless terminal (30) as well as a non-serving base station (28N) configured to control a non-serving cell (34N) in the active set of the wireless terminal (30). Methods and apparatus are provided for signaling, to the non-serving base station (28N), information indicating a subset of active carriers in the set of at least two carriers.
    Type: Application
    Filed: July 18, 2014
    Publication date: November 6, 2014
    Inventors: Johan BERGMAN, Klas JOHANSSON
  • Publication number: 20140301193
    Abstract: The present invention discloses schemes to perform load control taking uplink BLER statistics into account. An uplink load control method and apparatus are provided in a wireless communication system. The uplink load control method comprises estimating uplink load budget in a cell of the wireless communication system; determining whether the cell is over-loaded based on Block Error Rate (BLER) statistics of non-Guarded Bit Rate (non-GBR) users in the cell and/or Fast Congestion Control (FCC) action statistics in the cell; decreasing the uplink load budget if it is determined that the cell is over-loaded; and increasing the uplink load budget if it is determined that the cell is not over-loaded. Preferably, increasing or decreasing of the uplink load budget is based on the BLER stastics BLERstatistic of targeted users by FCC.
    Type: Application
    Filed: November 11, 2011
    Publication date: October 9, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jinhua Liu, Zhang Zhang, Mats Blomgren, Klas Johansson
  • Patent number: 8855700
    Abstract: A power control applied to a radio network controller (40) when a user equipment (300) is in communication with a serving radio base station (10) and at least one other radio base station (20) involves the radio network controller (40) providing a quality representation of an uplink control channel (12) from the user equipment (300) to the serving radio base station (10). The radio network controller (40) generates an updated power quality target for a reference control channel based on the quality representation and transmits the updated power quality target to at least one of the serving radio base station (10) and the at least one other radio base station (20). Alternatively, the radio network controller (40) generates an updated power offset for the uplink control channel (12) relative a reference control channel based on the quality representation and transmits the updated power offset to the user equipment (300).
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: October 7, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mats Blomgren, Johan Hultell, Klas Johansson
  • Patent number: 8854978
    Abstract: A radio access network (20) comprises a serving base station (28S) configured to control a serving cell (34S) in an active set of a wireless terminal (30) as well as a non-serving base station (28N) configured to control a non-serving cell (34N) in the active set of the wireless terminal (30). Methods and apparatus are provided for signaling, to the non-serving base station (28N), information indicating a subset of active carriers in the set of at least two carriers.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: October 7, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Bergman, Klas Johansson
  • Publication number: 20140256337
    Abstract: A method for power control stabilization in the uplink of a cellular CDMA communication system applying a fast inner loop power control comprises determining (210) of a radio frame based RoT value for a cell. A radio frame based SINR is determined (212) for individual UEs in the cell. The RoT value is compared (214) with a first threshold. Each frame based SINRs is compared (218) with a second threshold. The fast inner loop power control for a UE is broken (220) in dependence of the comparisons. The breaking comprises commanding (222) of a first number of consecutive power down commands to UEs having the frame based SINR above the second threshold for a RoT value above the first threshold and toggling (224) of power control commands for the subset of UEs during a second number of radio frames for a RoT value above the first threshold.
    Type: Application
    Filed: March 12, 2012
    Publication date: September 11, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Torbjorn Wigren, Klas Johansson, Anders Lamm, Magnus Persson, Liina Savolainen
  • Patent number: 8804676
    Abstract: In a cellular radio system, the number of TDM users per cell is limited. The cellular radio system can be a WCDMA system and in particular a WCDMA system employing an Enhanced Uplink (EUL). Other users in the cell are scheduled using CDM scheduling.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: August 12, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Marten Ericson, Rutger Andersson, Mats Blomgren, Klas Johansson, Patrik Karlsson
  • Patent number: 8797942
    Abstract: Random access coverage is assured while at the same time supporting high uplink data rates in a same service area served by a base station. A set of radio resources are shared by multiple mobile terminals for transmitting uplink to the base station including requests for access to service from the base station and transmissions for active connections with the base station. A first repeating time period and a second different repeating time period are defined. Uplink transmission grants are scheduled for active connections that permit use of a greater amount of the radio resources during the first repeating time period. Uplink transmission grants are also scheduled for active connections that permit use of a smaller amount of those resources during the second repeating time period. At least some random access requests to the base station are controlled to occur only during the second repeating time period.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mats Blomgren, Fredrik Gunnarsson, Bo Hagerman, Klas Johansson
  • Patent number: 8780754
    Abstract: Method and controlling network node (140) for transmitting data to a user equipment (130) over a set of radio links (115, 125), when a radio link (115, 125) is added, or removed. The controlling network node (140) is configured to communicate data to the respective radio network node (110, 120) over a respective backhaul link (118, 128), of which at least one backhaul link (118) is connected over an Internet Protocol, IP, network (150). The method (500) comprises measuring (501) the time delay over the corresponding backhaul link (118, 128) for each radio link (115, 125), determining (502) time difference between them, calculating (503) a buffer time for each radio link (115, 125), and buffering (507) data in a buffer (625) for the calculated period of time before forwarding the data to the radio network node (110, 120), for transmission to the user equipment (130).
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: July 15, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Klas Johansson, Stephen Craig
  • Patent number: 8743786
    Abstract: Teachings presented herein provide reduced computational complexity and/or memory requirements for a mobile terminal to determine the power backoff required for a multi-carrier uplink signal. In particular, the mobile terminal determines whether its power headroom falls below a pre-defined power headroom threshold, indicating that it is headroom limited. If so, it quantizes power allocated to each carrier of the multi-carrier uplink signal according to a pre-defined quantization policy. In doing so, the mobile terminal thereby reduces the possible configurations that may be selected for the multi-carrier uplink signal. Thus, in one embodiment, the mobile terminal stores the required backoff in a look-up table for only the configurations that may be selected when the mobile terminal is headroom limited. This relieves the memory requirements of the mobile terminal as compared to storing the required backoff for all possible configurations of the multi-carrier uplink signal.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: June 3, 2014
    Assignee: Unwired Planet, LLC
    Inventors: Klas Johansson, Torgny Palenius, Kai-Erik Sunell, Anders Wallen
  • Patent number: 8594000
    Abstract: The invention relates to a radio base station (102) and method in a radio base station of a cellular communications system (100) for controlling self-interference. The radio base station (102) supports communication with a user equipment (101) using multiple uplink and multiple downlink carriers (104a, 104b, 105a, 105b). The method comprises detecting a degraded downlink performance on a downlink carrier (105a) due to self-interference by determining that a set of predefined conditions applies. The method further comprises executing, in response to detection of the degraded downlink performance, an action to reduce self-interference between the uplink and downlink carriers (104a, 104b, 105a, 105b). The action is one of: uplink scheduling to reduce self-interference, deactivation of a secondary uplink carrier (14a, 104b), deactivation of a secondary downlink carrier (105a, 105b), and initiation of carrier reconfiguration to reduce self-interference.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: November 26, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Klas Johansson, Niilo Musikka, Henrik Nyberg, Anders Wallén
  • Publication number: 20130286865
    Abstract: Method and controlling network node (140) for transmitting data to a user equipment (130) over a set of radio links (115, 125), when a radio link (115, 125) is added, or removed. The controlling network node (140) is configured to communicate data to the respective radio network node (110, 120) over a respective backhaul link (118, 128), of which at least one backhaul link (118) is connected over an Internet Protocol, IP, network (150). The method (500) comprises measuring (501) the time delay over the corresponding backhaul link (118, 128) for each radio link (115, 125), determining (502) time difference between them, calculating (503) a buffer time for each radio link (115, 125), and buffering (507) data in a buffer (625) for the calculated period of time before forwarding the data to the radio network node (110, 120), for transmission to the user equipment (130).
    Type: Application
    Filed: April 26, 2012
    Publication date: October 31, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Klas Johansson, Stephen Craig