Patents by Inventor Ke Wang Helmersson

Ke Wang Helmersson 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: 10512093
    Abstract: Based on a service associated with data, a service-specific level of interference threshold (460) of the service is established and further a level of interference value (200) present on a radio interface of a cellular network is established. Based on the established level of interference threshold (460) and further based on the established level of interference value (200), it is selected between a predetermined first allocation scheme (491, 492) of radio resources on the radio interface and a predetermined second allocation scheme (491, 492) of radio resources on the radio interface.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: December 17, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ke Wang Helmersson, Nadia Brahmi
  • Patent number: 10034299
    Abstract: There are provided mechanisms for establishing a cooperating cluster (6a) in a cellular communications system (la-Id). According to one aspect a request for establishing a cooperating cluster (6a) to a second network node (2b) is transmitted from a first network node (2a). The cooperating cluster (6a) comprises at least one cell (3b, 3f) of the first network node (2a) and at least one cell (3g) of the second network node (2b). The request comprises a metric and identification of the cells to be clustered. An acceptance is by the first network node (2a) received (S104) from the second network node (2b) to implement operation of the cooperating cluster (6a).
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: July 24, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Martin Hessler, Ke Wang Helmersson
  • Patent number: 9866355
    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: Grant
    Filed: October 10, 2011
    Date of Patent: January 9, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mehdi Amirijoo, Fredrik Gunnarsson, Johan Moe, Ke Wang Helmersson, Kristina Zetterberg
  • Publication number: 20170230984
    Abstract: Based on a service associated with data, a service-specific level of interference threshold (460) of the service is established and further a level of interference value (200) present on a radio interface of a cellular network is established. Based on the established level of interference threshold (460) and further based on the established level of interference value (200), it is selected between a predetermined first allocation scheme (491, 492) of radio resources on the radio interface and a predetermined second allocation scheme (491, 492) of radio resources on the radio interface.
    Type: Application
    Filed: April 1, 2015
    Publication date: August 10, 2017
    Inventors: Ke Wang Helmersson, Nadia Brahmi
  • Publication number: 20160105903
    Abstract: There are provided mechanisms for establishing a cooperating cluster (6a) in a cellular communications system (1a-Id). According to one aspect a request for establishing a cooperating cluster (6a) to a second network node (2b) is transmitted from a first network node (2a). The cooperating cluster (6a) comprises at least one cell (3b, 3f) of the first network node (2a) and at least one cell (3g) of the second network node (2b). The request comprises a metric and identification of the cells to be clustered. An acceptance is by the first network node (2a) received (S104) from the second network node (2b) to implement operation of the cooperating cluster (6a).
    Type: Application
    Filed: May 28, 2013
    Publication date: April 14, 2016
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Martin HESSLER, Ke WANG HELMERSSON
  • Patent number: 9277510
    Abstract: The present invention relates to methods and arrangements of controlling an uplink data rate between a user equipment and a communication network node, which are communicating with each other on uplink and downlink data channels over a radio interface. A scheduler is arranged to distribute available scheduling headroom, provided by an uplink load control unit, between user equipments which are to be scheduled. A scheduling grant signalling is sent from the communication network node to the user equipment, based on which the user equipment is able to select a transport format combination (E-TFC).
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: March 1, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ke Wang Helmersson, Zhang Zhang
  • Patent number: 9203573
    Abstract: A method and a base station serving a first cell of a cellular network, for controlling interference coordination with at least one neighboring cell. The base station obtains transaction related information pertaining to a forthcoming data transaction involving at least one wireless terminal in the first cell, and estimates a transaction magnitude (TM) for said data transaction, based on the obtained transaction related information. The base station then controls employment of an Inter-Cell Interference Coordination scheme for the forthcoming data transaction, based on the estimated transaction magnitude.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: December 1, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Tomas Lundborg, Ke Wang Helmersson
  • Publication number: 20140370906
    Abstract: A method and a base station serving a first cell of a cellular network, for controlling interference coordination with at least one neighbouring cell. The base station obtains transaction related information pertaining to a forthcoming data transaction involving at least one wireless terminal in the first cell, and estimates a transaction magnitude (TM) for said data transaction, based on the obtained transaction related information. The base station then controls employment of an Inter-Cell Interference Coordination scheme for the forthcoming data transaction, based on the estimated transaction magnitude.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 18, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Tomas Lundborg, Ke Wang Helmersson
  • 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: 8725079
    Abstract: An interference analysis tool for identifying an interference problem area in a cellular radio network in which at least a first User Equipment (UE1) and a second UE (UE2) operate. The tool receives signal quality measurements and determines uplink or downlink interference severity. For UE2 uplink interference, the tool determines a first uplink Signal-to-Interference-and-Noise-Ratio (SINR) experienced by UE2, wherein the first SINR includes uplink interference from UE1. The tool also determines a second uplink SINR level (SINR0) experienced by UE2, wherein SINR0 does not include the uplink interference from UE1. The tool calculates a difference (?SINR) between SINR and SINR0 for UE2, and identifies the area where UE1 is operating as an interference-causing area when the ?SINR for UE2 is greater than a threshold value. The tool may present interference severity levels to an operator, and may initiate Radio Resource Management (RRM) procedures to mitigate interference problems in the network.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: May 13, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Ke Wang Helmersson, Martin Hessler
  • Patent number: 8483737
    Abstract: A method and arrangement in a node for allocating transmission resources is presented. The present method and arrangement for scheduling, allocates frequency resources based on the received signal power of user equipment. Thus in particular uplink power can be better utilized. According to the present method and arrangement the resource blocks are distributed so that the SINR of all scheduled user equipments reach a selected SINR target. The selection of SINR targets may be static or dynamic. Further, according to the present method and arrangement, optimization of system and user performance may be combined.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: July 9, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Eva Englund, Pål Frenger, Kristina Jersenius, Ke Wang Helmersson
  • Patent number: 8442548
    Abstract: A method may include determining whether a discrepancy exists between scheduling headroom computable by a first device and scheduling headroom computable by a second device, determining one or more load measurements that the second device bases its computation of the scheduling headroom if it is determined that the discrepancy exists, modifying the one or more load measurements, and calculating the scheduling headroom based on the modified one or more load measurements.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: May 14, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Eva Englund, Erik Geijer Lundin, Fredrik Gunnarsson, Ke Wang Helmersson
  • Patent number: 8385969
    Abstract: In a cellular radio system Transmission Power Control (TPC) power offset is set so that it is adjusted for each transmitting radio base station based on available relevant measurements that reflect the quality of the downlink channel carrying the uplink TPC command whereby an improved performance is obtained. The TPC power offset can for example be based on an estimated uplink Dedicated Physical Control CHannel (DPCCH) SINR, the number of TPC “up” and the number of TPC “down” sent by a radio base station and aggregated UE receiver power or UE transmit power over a number N slots. Also a mobile station used in a cellular radio system supporting soft handover may be adapted to apply TPC discarding thresholds based on the number and the quality of simultaneously received TPC commands.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: February 26, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Zhang Zhang, Ke Wang Helmersson, Rong Hu, Muhammad Kazmi, Bengt Lindoff
  • Patent number: 8385832
    Abstract: A multi-carrier cellular radio communication system includes a serving base station associate with a serving cell currently serving a mobile radio and a non-serving base station within range of the mobile radio and associated with a non-serving cell. The mobile radio can transmit to the serving base station at the same time over multiple radio frequency carriers. An estimate is made of inter-cell interference in the non-serving cell caused by uplink transmission by the mobile radio over one or more of the multiple radio frequency carriers over which the mobile radio is currently simultaneously transmitting. If the estimated inter-cell interference in the non-serving cell exceeds a predetermined threshold, then the inter-cell interference in the non-serving cell is reduced or limited by managing radio resources so that the estimated inter-cell interference in the non-serving cell is or becomes less than the predetermined threshold.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: February 26, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Klas Johansson, Ke Wang Helmersson
  • Publication number: 20120315935
    Abstract: An interference analysis tool for identifying an interference problem area in a cellular radio network in which at least a first User Equipment (UE1) and a second UE (UE2) operate. The tool receives signal quality measurements and determines uplink or downlink interference severity. For UE2 uplink interference, the tool determines a first uplink Signal-to-Interference-and-Noise-Ratio (SINR) experienced by UE2, wherein the first SINR includes uplink interference from UE1. The tool also determines a second uplink SINR level (SINR0) experienced by UE2, wherein SINR0 does not include the uplink interference from UE1. The tool calculates a difference (?SINR) between SINR and SINR0 for UE2, and identifies the area where UE1 is operating as an interference-causing area when the ?SINR for UE2 is greater than a threshold value. The tool may present interference severity levels to an operator, and may initiate Radio Resource Management (RRM) procedures to mitigate interference problems in the network.
    Type: Application
    Filed: September 13, 2011
    Publication date: December 13, 2012
    Inventors: Ke Wang Helmersson, Martin Hessler
  • Patent number: 8320266
    Abstract: A method and a device relating to a scheduling mechanism in a base station in a WCDMA system are disclosed. The mechanism enables the base station to rapidly adapt to users momentary traffic demands and to interference variations, a dynamical adjustable margin is proposed in this invention. The adjustment is based on the RoT measurement in a cell. To fully use the resource in a cell, the RoT can be targeted to be as closer to the RoTmax as possible however without exceed the limit. The scheduler is preferably set to schedule as high a rate or as many users as possible to fill up the available RoT. The margin which is reserved for the neighboring cell load and external interference is decreased step by step as long as the RoT measurement is below a threshold under RoTmax. Whenever the RoT measurement exceeds the threshold, the margin is increased by one step.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: November 27, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ke Wang Helmersson, Eva Englund, Patrik Karlsson
  • Publication number: 20120243423
    Abstract: A method may include determining whether a discrepancy exists between scheduling headroom computable by a first device and scheduling headroom computable by a second device, determining one or more load measurements that the second device bases its computation of the scheduling headroom if it is determined that the discrepancy exists, modifying the one or more load measurements, and calculating the scheduling headroom based on the modified one or more load measurements.
    Type: Application
    Filed: June 5, 2012
    Publication date: September 27, 2012
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Eva Englund, Fredrik Gunnarsson, Erik Geijer Lundin, Ke Wang Helmersson
  • Publication number: 20120201134
    Abstract: The present invention relates to methods and arrangements of controlling an uplink data rate between a user equipment and a communication network node, which are communicating with each other on uplink and downlink data channels over a radio interface. A scheduler is arranged to distribute available scheduling headroom, provided by an uplink load control unit, between user equipments which are to be scheduled. A scheduling grant signalling is sent from the communication network node to the user equipment, based on which the user equipment is able to select a transport format combination (E-TFC).
    Type: Application
    Filed: October 23, 2009
    Publication date: August 9, 2012
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ke Wang Helmersson, Zhang Zhang
  • Patent number: 8224345
    Abstract: A method may include determining whether a discrepancy exists between scheduling headroom computable by a first device and scheduling headroom computable by a second device, determining one or more load measurements that the second device bases its computation of the scheduling headroom if it is determined that the discrepancy exists, modifying the one or more load measurements, and calculating the scheduling headroom based on the modified one or more load measurements.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: July 17, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Eva Englund, Fredrik Gunnarsson, Erik Geijer Lundin, Ke Wang Helmersson
  • Patent number: 8208456
    Abstract: A method and an arrangement for obtaining efficient radio resource utilization in a communication network comprising a first communication network entity (10), a second communication network entity (15) connected to said first communication network over a communication interface and one or more user equipments (18) transmitting data to said second communication network entity (15) over a radio interface. The user equipments (18) perform the step of autonomously selecting a hybrid automatic retransmission request (HARQ) operating point in order to efficiently deliver transmitted data.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: June 26, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ke Wang Helmersson, Maria Samuelsson, Erik Dahlman, Maria Edvardsson, Eva Englund, Mats Fredrik Sagfors, Janne Peisa, Stefan Parkvall