Patents by Inventor Kristina Zetterberg

Kristina Zetterberg 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: 20140349695
    Abstract: The invention relates to a method for service aware scheduling of wireless resources in a wireless network. According to the inventive method, a service request for service delivery of a service type is received (51). A performance to value relationship for the service type is determined (52) and approximated (53) with a scheduling weight function associated with the service type. Previous performance for service delivery related to this service request is evaluated and approximated with a performance estimate (54). A scheduling weight is determined (55) by introducing the performance estimate in the scheduling weight function. Resource scheduling is performed (58) following a step of comparing (56) scheduling weights for on-going service requests. The invention also includes a network node and a system for service aware scheduling of wireless resources in a wireless network.
    Type: Application
    Filed: December 5, 2011
    Publication date: November 27, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Kristina Zetterberg, Mehdi Amirijoo, Fredrik Gunnarsson, Johan Moe, Birgitta Olin
  • Publication number: 20140248890
    Abstract: Methods, arrangement and network nodes for supporting inter-cell coordination of scheduling of radio resources subjected to inter cell interference. The methods involve identifying one or more radio resources which are subjected to inter-cell interference between a first cell and a second cell. The methods further involve deriving a respective service value related to service that could be provided in the respective first and second cell by use of the one or more radio resources. Further, transmissions in the one or more radio resources are controlled based on comparison of the service values, thus enabling inter-cell service value-based scheduling of the one or more radio resources, prioritizing services having the highest value per radio resource.
    Type: Application
    Filed: October 10, 2011
    Publication date: September 4, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mehdi Amirijoo, Fredrik Gunnarsson, Johan Moe, Ke Wang Helmersson, Kristina Zetterberg
  • Patent number: 8805362
    Abstract: A method and a communication network node for satisfying detection miss probability and false detection probability requirements in a random access channel used by mobile stations (MS) for accessing a communication network system comprising radio base stations (BS) each serving at least one cell (19). The method includes optimizing a random access channel, wherein the method performs estimating detection miss probability (P m) in said cell, tuning random access parameters such that said estimated detection miss probability satisfies predetermined requirements, estimating a false detection probability (P f) in said communication cell (19), tuning said random access parameters such that said estimated false detection probability satisfies predetermined requirements, and tuning said random access parameters such that an extensive interference caused by mobile stations attempting random access in said communication cell is avoided.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: August 12, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mehdi Amirijoo, Pål Frenger, Fredrik Gunnarsson, Johan Moe, Kristina Zetterberg
  • Publication number: 20140155065
    Abstract: Inter-radio access technology (IRAT) ping pong handover of a user equipment (UE) connection between a source radio access technology (RAT) communications network, e.g., LTE, and a different target RAT communications network, e.g., UTRAN, is detected. A control node determines IRAT ping pong handover information and evaluates an IRAT handover request message for the UE connection from the source RAT network with respect to the handover ping pong information. Based thereon, the node determines that the UE connection meets one or more ping pong conditions associated with the handover ping pong information and provides an indication of an IRAT ping pong handover condition to a base station in the source RAT network to allow the base station to make mobility adjustments.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 5, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Angelo Centonza, Fredrik Gunnarsson, Kristina Zetterberg
  • Patent number: 8738004
    Abstract: Handover (HO) statistics and handover issue events which are due to non-mobility causes are not included in the statistics fed into mobility robustness optimization (MRO). The non-mobility causes may include, e.g., load balancing, retracting users to prepare for cell maintenance or restart/reconfiguration and cell outage including compensation means. Radio link failure (RLF), handover failure (HOF), and handover oscillations (HOosc) that are due to non-mobility cause are excluded from the statistics upon which mobility robustness optimization is based. Non-mobility causes are also differentiated from mobility causes when reporting key performance indicators to an operator.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: May 27, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mehdi Amirijoo, Fredrik Gunnarsson, Birgitta Olin, Johan Moe, Kristina Zetterberg
  • Publication number: 20140106756
    Abstract: In one of its aspects the technology concerns a method of operating a telecommunications system comprising a serving radio base station and a candidate radio base station. The serving radio base station comprises a radio base station to which a wireless mobile station provides measurement reports. The serving radio base station and the candidate radio base station are different with respect to at least one of frequency and radio access technology. The method comprises the serving radio base station allowing the mobile station to obtain information broadcasted by the candidate radio base station. The information is either information for locating Cell Global Identity (CGI) of the candidate radio base station or the Cell Global Identity (CGI) itself of the radio base station. The mobile station obtains the information from the candidate radio base station during at least one reading gap.
    Type: Application
    Filed: October 10, 2013
    Publication date: April 17, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mehdi AMIRIJOO, Pal Frenger, Fredrik Gunnarsson, Harald Kallin, Johan Moe, Kristina Zetterberg
  • Publication number: 20130344889
    Abstract: A method in a first radio network node (105, 110, 120) for handling positioning of a first user equipment (110) is provided. The first radio network node (105, 110, 120) defines a criterion relating to at least one measurable radio quality of the first user equipment (110). The criterion is based on historical measurements of the at least one radio quality of at least one second user equipment having experienced a radio event. Fulfilment of the criterion is an indication that the radio event is upcoming for the first user equipment (110). The first radio network node (105, 110, 120) receives a current measurement of the at least one radio quality of the first user equipment (110), for which first user equipment (110) the radio event is currently upcoming. When the criterion is fulfilled, the first radio network node (105, 110, 120) triggers positioning of the first user equipment (110).
    Type: Application
    Filed: March 7, 2011
    Publication date: December 26, 2013
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mehdi Amirijoo, Fredrik Gunnarsson, Johan Moe, Kristina Zetterberg
  • Patent number: 8583104
    Abstract: A telecommunications system comprises a serving radio base station and a candidate radio base station which are different with respect to at least one of frequency and radio access technology. The serving radio base station comprises a radio base station to which a wireless mobile station provides measurement reports. A method comprises the serving radio base station allowing the mobile station to obtain information broadcasted by the candidate radio base station. The information is either information for locating Cell Global Identity (CGI) of the candidate radio base station or the Cell Global Identity (CGI) itself of the radio base station. The mobile station obtains the information from the candidate radio base station during at least one reading gap. The reading gap is a time period in which the mobile station does not receive information from the serving radio base station.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: November 12, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mehdi Amirijoo, Pål Frenger, Fredrik Gunnarsson, Harald Kallin, Johan Moe, Kristina Zetterberg
  • Publication number: 20130115959
    Abstract: Handover (HO) statistics and handover issue events which are due to non-mobility causes are not included in the statistics fed into mobility robustness optimization (MRO). The non-mobility causes may include, e.g., load balancing, retracting users to prepare for cell maintenance or restart/reconfiguration and cell outage including compensation means. Radio link failure (RLF), handover failure (HOF), and handover oscillations (HOosc) that are due to non-mobility cause are excluded from the statistics upon which mobility robustness optimization is based. Non-mobility causes are also differentiated from mobility causes when reporting key performance indicators to an operator.
    Type: Application
    Filed: March 22, 2012
    Publication date: May 9, 2013
    Inventors: Mehdi Amirijoo, Fredrik Gunnarsson, Birgitta Olin, Johan Moe, Kristina Zetterberg
  • Patent number: 8417244
    Abstract: A device detects poor coverage associated with a source radio access technology (RAT) with which the device is connected, and connects to a target RAT. The device also measures the source RAT for a time period after connecting to the target RAT, and sends, based on the measurements, one or more measurement reports to the target RAT, where the target RAT forwards the one or more measurement reports to the source RAT. Alternatively, or additionally, the target RAT may detect that the handover was triggered too early and may inform the source RAT or command the UE to return to the source RAT. The device further stops the measuring and the sending when the time period expires. In this way, IRAT handover parameters may be automatically or manually tuned to minimize the number of handovers triggered too early, which may result in a more efficient cell configuration.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: April 9, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jose Alonso-Rubio, Kristina Zetterberg
  • Patent number: 8295848
    Abstract: The present invention relates to a method and a communication network node for automatically tuning a PRACH configuration parameter in a communication network system comprising radio base stations each serving at least one cell and with which user equipments are communicating on uplink and downlink channels. The PRACH configuration parameter is used for defining the division of uplink resource blocks between PRACH and PUSCH. Load statistics on RACH and PUSCH are collected used for determining a number of RACH opportunities required per time unit. Then a new PRACH configuration parameter having said required number of RACH opportunities per time unit is selected which is replacing the old PRACH configuration parameter.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: October 23, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Pål Frenger, Mehdi Amirijoo, Fredrik Gunnarsson, Kristina Zetterberg, Johan Moe
  • Patent number: 8238920
    Abstract: Automatic setting and/or adjusting of the threshold(s) for triggering measurements of signal strength/quality of other RATs that are needed for IRAT mobility is described. The setting and/or adjusting of the threshold(s) triggering IRAT measurements is automatically optimized and preferably performed for each BS. Initially, constraints on the optimization of the IRAT measurement triggering threshold(s) are set, and a start value for the optimization of the IRAT measurement triggering threshold(s) is provided or determined. Input information needed for the optimization of the IRAT measurement triggering threshold(s) are then collected, and new IRAT measurement triggering threshold(s) are determined and set or existing IRAT measurement triggering threshold(s) are adjusted if appropriate.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: August 7, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Kristina Zetterberg, Jose Alonso-Rubio
  • Publication number: 20120163238
    Abstract: In a cellular radio system a message indicating a change of cell size can be transmitted to a number of affected cells, in particular, neighboring cells. The affected cells receiving such a message can be adapted to use the information in the message when determining self-optimization parameters used for control purposes. Hereby, better response times can be achieved without reducing noise sensitivity.
    Type: Application
    Filed: September 9, 2009
    Publication date: June 28, 2012
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Gunnarsson, Mehdi Amirijoo, Pal Frenger, Johan Moe, Kristina Zetterberg
  • Publication number: 20120164955
    Abstract: In a method and an apparatus for determining when a cell of a cellular radio system can enter a discontinuous transmission mode is provided. By evaluating qualities from both the cell and neighboring cells for a number of positions and calculating a statistically expected quality distribution of the evaluated qualities conditioned on that certain cells are in discontinuous transmission mode it is possible to generate a distribution which can be compared with at least one requirement thresholds. Based on the comparison it is possible to determine if first cell can use discontinuous transmission mode and still fulfill the requirements.
    Type: Application
    Filed: September 10, 2009
    Publication date: June 28, 2012
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Mehdi Amirijoo, Pål Frenger, Harald Kallin, Johan Moe, Kristina Zetterberg
  • Publication number: 20120064897
    Abstract: A telecommunications system comprises a serving radio base station and a candidate radio base station which are different with respect to at least one of frequency and radio access technology. The serving radio base station comprises a radio base station to which a wireless mobile station provides measurement reports. A method comprises the serving radio base station allowing the mobile station to obtain information broadcasted by the candidate radio base station. The information is either information for locating Cell Global Identity (CGI) of the candidate radio base station or the Cell Global Identity (CGI) itself of the radio base station. The mobile station obtains the information from the candidate radio base station during at least one reading gap. The reading gap is a time period in which the mobile station does not receive information from the serving radio base station.
    Type: Application
    Filed: October 26, 2011
    Publication date: March 15, 2012
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mehdi Amirijoo, Pål Frenger, Fredrik Gunnarsson, Harald Kallin, Johan Moe, Kristina Zetterberg
  • Patent number: 8107950
    Abstract: In one of its aspects the technology concerns a method of operating a telecommunications system comprising a serving radio base station and a candidate radio base station. The serving radio base station comprises a radio base station to which a wireless mobile station provides measurement reports. The serving radio base station and the candidate radio base station are different with respect to at least one of frequency and radio access technology. The method comprises the serving radio base station allowing the mobile station to obtain information broadcasted by the candidate radio base station. The information is either information for locating Cell Global Identity (CGI) of the candidate radio base station or the Cell Global Identity (CGI) itself of the radio base station. The mobile station obtains the information from the candidate radio base station during at least one reading gap.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: January 31, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Mehdi Amirijoo, Pål Frenger, Fredrik Gunnarsson, Harald Kallin, Johan Moe, Kristina Zetterberg
  • Patent number: 8095143
    Abstract: A device obtains a service change associated with a cell in a radio network, and identifies helper cells in the radio network that need new random access channel (RACH) parameters due to the service change. The device also determines a RACH parameters configuration for the helper cells, and configures the helper cells with the determined RACH parameters configuration.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: January 10, 2012
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventors: Mehdi Amirijoo, Pål Frenger, Fredrik Gunnarsson, Johan Moe, Kristina Zetterberg
  • Publication number: 20110263255
    Abstract: A device detects poor coverage associated with a source radio access technology (RAT) with which the device is connected, and connects to a target RAT. The device also measures the source RAT for a time period after connecting to the target RAT, and sends, based on the measurements, one or more measurement reports to the target RAT, where the target RAT forwards the one or more measurement reports to the source RAT. Alternatively, or additionally, the target RAT may detect that the handover was triggered too early and may inform the source RAT or command the UE to return to the source RAT. The device further stops the measuring and the sending when the time period expires. In this way, IRAT handover parameters may be automatically or manually tuned to minimize the number of handovers triggered too early, which may result in a more efficient cell configuration.
    Type: Application
    Filed: April 23, 2010
    Publication date: October 27, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON
    Inventors: Jose ALONSO-RUBIO, Kristina ZETTERBERG
  • Publication number: 20110235529
    Abstract: The present invention relates to a method and a communication network node for enabling automatic optimization of a random access preamble format usage in a communication network system. The network comprises the communication network node serving at least one cell to which user equipments are accessing. A random access preamble format is set for each cell and comprises a random access sequence length, TSEQ, and a random access preamble cyclic prefix length, TCP. First, the random access sequence length, TSEQ is selected and then the random access preamble cyclic prefix length, T CP is selected. Based on the selected random access sequence length, T SEQ and random access preamble cyclic prefix length, TCP, which random access preamble format to use in said cell is selected.
    Type: Application
    Filed: December 5, 2008
    Publication date: September 29, 2011
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Kristina Zetterberg, Mehdi Amirijoo, Pal Frenger, Fredrik Gunnarsson, Johan Moe
  • Publication number: 20110176430
    Abstract: Automatic setting and/or adjusting of the threshold(s) for triggering measurements of signal strength/quality of other RATs that are needed for IRAT mobility is described. The setting and/or adjusting of the threshold(s) triggering IRAT measurements is automatically optimized and preferably performed for each BS. Initially, constraints on the optimization of the IRAT measurement triggering threshold(s) are set, and a start value for the optimization of the IRAT measurement triggering threshold(s) is provided or determined. Input information needed for the optimization of the IRAT measurement triggering threshold(s) are then collected, and new IRAT measurement triggering threshold(s) are determined and set or existing IRAT measurement triggering threshold(s) are adjusted if appropriate.
    Type: Application
    Filed: January 20, 2010
    Publication date: July 21, 2011
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Kristina Zetterberg, Jose Alonso-Rubio