Patents by Inventor Christian Bergljung

Christian Bergljung 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: 8331254
    Abstract: Methods and apparatus in a frequency division duplex, orthogonal frequency division multiplex communication system assign resources, including the number, frequency position, and coding, in a subframe of a downlink to a user equipment (UE) based on parameters that influence the robustness against UE self-induced interference when the UE is scheduled for uplink transmission in that subframe.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 11, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Matthias Kamuf, Christian Bergljung, Fredrik Nordström
  • Publication number: 20120281775
    Abstract: A method of controlling transmission output power in a cellular telecommunications network includes setting. a pre-defined power mask for at least one of a sub-frame and an Orthogonal Frequency-Division Multiplexing (OFDM) symbol of a signal transmission. The power mask is defined by at least one parameter. The method further includes adapting at least one of the at least one power mask parameter of the power mask to a signal transmission characteristic of the signal transmission and applying the adapted power mask to at least one of the sub-frame and the OFDM symbol.
    Type: Application
    Filed: July 13, 2012
    Publication date: November 8, 2012
    Inventors: Muhammad Kazmi, Olav Queseth, Christian Bergljung, Ming Chen
  • Patent number: 8223863
    Abstract: The present invention relates to the area of wireless communication, and especially to a method and an arrangement for transmission output power control in a cellular telecommunications network. An improved transmission output power control is achieved by adapting a pre-defined power mask to a signal transmission characteristic of the signal transmission and applying the adapted power mask to a sub-frame or an OFDM symbol. The present invention could be implemented in a network node such as an eNodeB or in a user equipment.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 17, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Christian Bergljung, Ming Chen, Muhammad Kazmi, Olav Queseth
  • Patent number: 8213873
    Abstract: According to one aspect, the present invention advantageously provides a method and apparatus that increase communications throughput by manipulating the order or manner in which CQI values are reported in a multi-rank CQI report that constrains one or more such values according to reporting order. As a non-limiting example, the present invention provides that the reporting order used for reporting multiple CQI values is chosen to eliminate or at least reduce under-reporting and over-reporting errors arising from the use of differential reporting formats for one or more of the reported CQI values. Additionally, the present invention provides for selection between single-rank or multi-rank CQI reporting, based on determining which one corresponds to the highest channel capacity, in view of the differential reporting constraints.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: July 3, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Christian Bergljung, Fredrik Nordström
  • Publication number: 20120096168
    Abstract: A method for allocating orthogonal sequences to user equipment devices, UEs, of a group sharing a channel of a telecommunication system is disclosed. The method comprises determining which UE of the group having largest transmission resource assigned for a physical up-link shared channel, PUSCH; determining a first orthogonal sequence of the UE of the group having largest transmission resource assigned; determining a second sequence that equals a quadrature phase offset of the first orthogonal sequence; reserving said second sequence when allocating sequences to remaining UEs of the group by avoiding the second sequence as long as there are other orthogonal sequences available. A control circuitry for a network node is also disclosed.
    Type: Application
    Filed: May 6, 2010
    Publication date: April 19, 2012
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Matthias Kamuf, Christian Bergljung
  • Publication number: 20120088538
    Abstract: A mobile terminal transmits one or more first communication channels in a first frequency region and one or more second communication channels in a second frequency region. With the channels experiencing different fading conditions, the terminal receives separate transmit power control (TPC) commands. Instead of simply adjusting the transmit power of the channels as commanded, the terminal computes a power offset indicative of the difference between the commanded power of one or more of the first channels and the commanded power of one or more of the second channels. The terminal then selectively performs transmit power control of the first and second channels on either an independent basis, according to the respective TPC commands, or a joint basis, depending on whether the computed power offset falls outside of a pre-determined range of values. In doing so, the terminal allows independent control of channels, while also mitigating self-interference and/or spectral emissions.
    Type: Application
    Filed: June 10, 2010
    Publication date: April 12, 2012
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Anders Wallén, Bengt Lindoff, Christian Bergljung
  • Publication number: 20120076056
    Abstract: The present invention relates to scheduling of uplink and downlink resources between mobile terminals (110, 120) and a base station (130). To reduce the power leakage between the transmitter and the receiver of the mobile terminal (110), the scheduler allocates uplink frequency carriers and downlink frequency carriers with a large duplex distance to those mobile terminals (110, 120) that have to transmit with high power. This means that the requirements on the external SAW filter could be reduced.
    Type: Application
    Filed: April 8, 2010
    Publication date: March 29, 2012
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Tillman, Christian Bergljung, Bengt Lindoff
  • Publication number: 20120058772
    Abstract: The disclosure relates to methods and arrangements wherein a user equipment (UE) supporting a first frequency band HB is enabled to communicate with a network utilizing a second frequency band. The second frequency band is a sub-band of the first frequency band or overlaps with the first frequency band. The UE, which supports the first frequency band, implements 32 the channel numbering scheme of the second frequency band SB which overlaps with the first frequency band HB. This enables the UE supporting the first frequency band HB to recognize the second frequency band SB and communicate 33 with the network when the UE is camped or connected to a cell operating in the second frequency band SB.
    Type: Application
    Filed: July 5, 2011
    Publication date: March 8, 2012
    Inventors: Muhammad Kazmi, Christian Bergljung
  • Publication number: 20110274092
    Abstract: Method and arrangement in a base station for scheduling physical resources in a transmission bandwidth to a user equipment served by the base station. The physical resources may be physical channels or radio resource blocks. Some physical resources within the transmission bandwidth are subjected to a performance requirement power restriction value. The method comprises scheduling physical resources based on the performance requirement power restriction value of the physical resources to be scheduled. Also, a method and arrangement in a user equipment for assisting a base station in scheduling physical resources in a transmission bandwidth to the user equipment is described.
    Type: Application
    Filed: November 23, 2009
    Publication date: November 10, 2011
    Applicant: Telefonakiebolaget LM Ericsson (publ)
    Inventors: Yin Liu, Muhammad Kazmi, Rong Hu, Christian Bergljung
  • Publication number: 20110250848
    Abstract: According to one aspect, the present invention advantageously provides a method and apparatus that increase communications throughput by manipulating the order or manner in which CQI values are reported in a multi-rank CQI report that constrains one or more such values according to reporting order. As a non-limiting example, the present invention provides that the reporting order used for reporting multiple CQI values is chosen to eliminate or at least reduce under-reporting and over-reporting errors arising from the use of differential reporting formats for one or more of the reported CQI values. Additionally, the present invention provides for selection between single-rank or multi-rank CQI reporting, based on determining which one corresponds to the highest channel capacity, in view of the differential reporting constraints.
    Type: Application
    Filed: October 8, 2010
    Publication date: October 13, 2011
    Inventors: Christian Bergljung, Fredrik Nordstrom
  • Publication number: 20110250857
    Abstract: Mobile communication system equipment avoids interfering with another transmitter's operation. Sensing information indicating whether the other transmitter's signal has been detected is received from remote sensors, wherein each of the remote sensors is situated at a respective one of two or more sensor locations. The sensing information and information about the sensor locations is used to ascertain one or more exclusion boundaries needed to avoid interfering with the other transmitter's use of the spectral resource. Beamforming parameters are ascertained that will enable the main node to transmit within one or more predefined geographical areas except for any portion of a predefined area located on a far side of the one or more exclusion boundaries. Two or more adjusted signals are produced as a function of the beamforming parameters and one or more signals to be transmitted. The adjusted signals are transmitted from respective ones of two or more antennas.
    Type: Application
    Filed: April 12, 2010
    Publication date: October 13, 2011
    Inventors: Andres Reial, Christian Bergljung, Anders Rosenqvist
  • Publication number: 20110243111
    Abstract: A terminal with transmitter and receiver operates in a multi-carrier communication system and receives at least two downlink carriers. One or more timing advance commands are received, each associated with a group of one or more uplink carriers, each group being associated with one or more of the received downlink carriers. For each downlink carrier associated with one of the groups of uplink carriers, one is selected as a reference downlink carrier; the reference downlink carrier timing is ascertained; and a transmission time period is ascertained based on the timing of the downlink reference carrier and an offset specified by the timing advance command associated with the group of uplink carriers. The transmission time period comprises a start time and a stop time. Transmission is initiated at an earliest transmission start time of the ascertained transmission time periods and is ceased at a latest ascertained stop time.
    Type: Application
    Filed: August 26, 2010
    Publication date: October 6, 2011
    Inventors: Niklas Andgart, Christian Bergljung, Matthias Kamuf, Bengt Lindoff, Anders Wallén
  • Patent number: 8005039
    Abstract: A base station includes transmitter and associated processing circuits. The transmitter circuits are configured to transmit control information and data traffic to mobile terminals in repeating transmission intervals, each interval having defined control and data portions. The processing circuits are configured to dynamically determine that the control portion has insufficient resources for transmitting control information to one or more of the mobile terminals, and, in response, at least temporarily transmit control information in the data portion, rather than in the control portion, for a selected one or more of the mobile terminals. Correspondingly, a mobile terminal is configured to selectively search for and decode control information in the data portion of one or more transmission intervals, rather than in the control portion.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: August 23, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Matthias Kamuf, Christian Bergljung, Bo Lincoln
  • Publication number: 20110103243
    Abstract: Flexible carrier aggregation is provided for a radio communications system. A capability is determined to communicate over a radio interface using multiple radio frequency component carriers. Each of the multiple component carriers is configurable with one or more control channels in a first mode of operation and with no control channels in a second mode of operation. Configuration information for one of the multiple radio frequency component carriers is signaled to indicate at least one of the component carriers is configured to operate in a selected one of the first mode of operation and the second mode of operation so that a network radio node and a user equipment radio node can communicate using the selected mode of operation.
    Type: Application
    Filed: September 1, 2010
    Publication date: May 5, 2011
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Magnus LARSSON, Christian BERGLJUNG, Muhammad KAZMI
  • Publication number: 20110051829
    Abstract: The present invention relates to the area of wireless communication, and especially to a method and an arrangement for transmission output power control in a cellular telecommunications network. An improved transmission output power control is achieved by adapting a pre-defined power mask to a signal transmission characteristic of the signal transmission and applying the adapted power mask to a sub-frame or an OFDM symbol. The present invention could be implemented in a network node such as an eNodeB or in a user equipment.
    Type: Application
    Filed: December 18, 2008
    Publication date: March 3, 2011
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Christian Bergljung, Ming Chen, Muhammad Kazmi, Olav Queseth
  • Publication number: 20110026415
    Abstract: Methods and apparatus in a frequency division duplex, orthogonal frequency division multiplex communication system assign resources, including the number, frequency position, and coding, in a subframe of a downlink to a user equipment (UE) based on parameters that influence the robustness against UE self-induced interference when the UE is scheduled for uplink transmission in that subframe.
    Type: Application
    Filed: December 18, 2009
    Publication date: February 3, 2011
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUB)
    Inventors: Matthias Kamuf, Christian Bergljung, Fredrik Nordström
  • Publication number: 20100216473
    Abstract: The present invention relates to exchanging a cell-specific parameter such as the A-MPR, comprising information related to a required additional maximum power reduction of a UE transmitter between networks nodes. The networks nodes may be radio base stations or other network nodes such as radio network controllers or core network nodes exemplified by access gateways (aGWs). By exchanging this cell-specific parameter with information of the required additional maximum power reduction between the network nodes, the cell-specific parameter is provided to the radio base station of the serving cell which implies that the serving cell can send the cell-specific parameter of the target cell to the UE prior to the handover from the serving cell to the target cell. This result in that the UE can start transmission to the target cell with the correct cell-specific parameter and the out-of-band emission requirements can be fulfilled in the target cell.
    Type: Application
    Filed: April 29, 2008
    Publication date: August 26, 2010
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Muhammad Kazmi, Christian Bergljung
  • Publication number: 20100165847
    Abstract: A base station includes transmitter and associated processing circuits. The transmitter circuits are configured to transmit control information and data traffic to mobile terminals in repeating transmission intervals, each interval having defined control and data portions. The processing circuits are configured to dynamically determine that the control portion has insufficient resources for transmitting control information to one or more of the mobile terminals, and, in response, at least temporarily transmit control information in the data portion, rather than in the control portion, for a selected one or more of the mobile terminals. Correspondingly, a mobile terminal is configured to selectively search for and decode control information in the data portion of one or more transmission intervals, rather than in the control portion.
    Type: Application
    Filed: May 12, 2009
    Publication date: July 1, 2010
    Inventors: Matthias Kamuf, Christian Bergljung, Bo Lincoln
  • Publication number: 20090310492
    Abstract: The present invention relates to a method and apparatus for testing mobile terminals in an OFDMA system, in which all or part of available downlink radio resources in a cell are transmitted. A processing unit in a test apparatus splits the resources used for transmission into contiguous unities in the frequency domain such that one or more of said unities comprise resources allocated to one or more mobile terminals under test, and at least one of said unities comprise resources allocated to virtual users.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 17, 2009
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Muhammad Ali Kazmi, Joakim Axmon, Christian Bergljung, Farshid Ghasemzadeh, Walter Muller