Patents by Inventor Erik Dahlman

Erik Dahlman 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: 20170033900
    Abstract: A first User Equipment (UE), a second UE, a first Radio Network Node (RNN), and methods therein for controlling interference between transmissions in a first system and transmissions in a second system. The first system comprises the first UE and the first RNN serving the first UE. The second system comprises the second UE and a second RNN serving the second UE. The first system has a first priority in a first part of a shared spectrum and the second system has a second priority in the first part of the shared spectrum, wherein the first priority is higher than the second priority. The method in the first UE comprises transmitting a signal to a second RNN that is to perform a downlink transmission to the second UE, which signal is configured to control the transmission of the second RNN.
    Type: Application
    Filed: October 14, 2016
    Publication date: February 2, 2017
    Inventors: Erik DAHLMAN, Magnus FRODIGH, Anders FURUSKAR, Niklas JOHANSSON, Stefan PARKVALL
  • Patent number: 9537628
    Abstract: Methods and apparatus are disclosed for receiving user data in a wireless communication system that employs coordinated multi-point transmission of the user data from a first cell serving a wireless terminal and a second cell site neighboring the first cell site. In an exemplary system, the first cell site maps control signals and user data to a time-frequency resources according to a first mapping pattern, while the second cell site maps control data and traffic data to the time-frequency resources according to a second mapping pattern.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: January 3, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: George Jöngren, Erik Dahlman
  • Publication number: 20160380684
    Abstract: For future wireless systems, it is desired to keep network implementation aspects, such as transmission point selection, precoder selection, etc, transparent to the terminal. This means that terminals are envisaged to be unaware of e.g. from which specific network node a transmission is made. This may be referred to as the transparency principle. The proposed solution comprises enabling a receiver to determine a type of antenna association that may be assumed in regard of two blocks of information, based on the result of the decoding of e.g. the first data block. The determination is done in a way such that the principle of transparency is not broken.
    Type: Application
    Filed: June 25, 2015
    Publication date: December 29, 2016
    Inventors: Karl Werner, Robert Baldemair, Håkan Björkegren, Erik Dahlman, Stefan Parkvall
  • Patent number: 9532355
    Abstract: In one embodiment, a method of transmitting system information on a downlink shared channel structured as successive subframes includes transmitting (400-416) system information in regularly occurring time windows, each time window spanning some number of successive subframes. The method further includes indicating (406/408) to receiving user equipment (120) which subframes within a given time window carry system information. The method and variations of it are applied, for example, to the transmission of dynamic system information on the downlink shared channel or other downlink channel in a 3GPP E-UTRA wireless communication network (100).
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: December 27, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Dahlman, Vera Vukajlovic Kenehan
  • Patent number: 9532313
    Abstract: A transmit power control (TPC) method and a user equipment (UE) of a telecommunications network utilizing the TPC method. The UE receives TPC commands intended for traffic and control channels. The TPC commands are separately identified by logical or physical resources associated with the channels. When the traffic and control channel TPCs occupy the same resources, the UE applies common power control commands to the traffic and control channels. When the traffic and control channel TPCs occupy different resources, the UE applies separate power control commands to the traffic and control channels.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: December 27, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Dahlman, Anders Furuskär
  • Publication number: 20160373947
    Abstract: A method and a wireless device (110) for managing probe messages are disclosed. The probe messages are used for verifying a required level of a connectivity for a service of the wireless device (110) towards a wireless network (100). The required level of the connectivity relates to likelihood of maintaining the connectivity towards the wireless network (100). The wireless device (110) estimates an estimated level of the connectivity for the wireless device (110). The wireless device (110) further adjusts an amount of the probe messages based on the required level of the connectivity and the estimated level of the connectivity. Moreover, corresponding computer programs and computer program products are disclosed.
    Type: Application
    Filed: March 4, 2014
    Publication date: December 22, 2016
    Inventors: Erik Dahlman, Magnus Frodigh, Mikael Höök, Harald Kallin, Gunnar Mildh, Joachim Sachs
  • Publication number: 20160374101
    Abstract: Methods, a wireless device (110) and a network node (120) for managing connectivity are disclosed. The wireless device (110) and/or the network node (120) determines an estimated level of a connectivity for a service of the wireless device (110) towards a wireless network (100). The estimated level of the connectivity relates to likelihood of maintaining the connectivity towards the wireless network (100). The estimated level of the connectivity is determined based on conditions relating to at least one connection for the wireless device (110). The at least one connection is managed by the wireless network (100). Moreover, corresponding computer programs and computer program products are disclosed.
    Type: Application
    Filed: March 4, 2014
    Publication date: December 22, 2016
    Inventors: Erik Dahlman, Magnus Frodigh, Mikael Höök, Harald Kallin, Gunnar Mildh, Joachim Sachs
  • Patent number: 9503129
    Abstract: A first User Equipment (UE), a second UE, a first Radio Network Node (RNN), and methods therein for controlling interference between transmissions in a first system and transmissions in a second system. The first system comprises the first UE and the first RNN serving the first UE. The second system comprises the second UE and a second RNN serving the second UE. The first system has a first priority in a first part of a shared spectrum and the second system has a second priority in the first part of the shared spectrum, wherein the first priority is higher than the second priority. The method in the first UE comprises transmitting a signal to a second RNN that is to perform a downlink transmission to the second UE, which signal is configured to control the transmission of the second RNN.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: November 22, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Erik Dahlman, Carl Magnus Frodigh, Anders Furuskär, Niklas Johansson, Stefan Parkvall
  • Publication number: 20160337949
    Abstract: It is disclosed a wireless device (302, 90, 100), a radio network node (304, 70, 80) and methods therefore, for communicating in a network. The wireless device is configured to determine (52, 306) one or more possible first sequences of a discovery signal. The wireless device is configured to receive (54, 310) a second sequence of the discovery signal, and to determine (56, 312) if the one or more possible first sequences match the second sequence.
    Type: Application
    Filed: January 7, 2014
    Publication date: November 17, 2016
    Inventors: Stefan Parkvall, Erik Dahlman
  • Patent number: 9496918
    Abstract: Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different mobile terminals depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the mobile terminals in a scheduling grant.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: November 15, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Dahlman, Ylva Jading, Per Skillermark, Stefan Parkvall
  • Publication number: 20160294518
    Abstract: The available transmission resources on a downlink-shared channel are divided into resource blocks, each resource block comprising a predetermined number of sub-carriers during a predetermined time period. The resource blocks are subdivided into localized resource blocks and distributed resource blocks. A user requiring sufficient resources can be allocated a plurality of said localized resource blocks. A user who would require only a small number of said localized resource blocks can instead be allocated subunits of a plurality of said distributed resource blocks.
    Type: Application
    Filed: June 9, 2016
    Publication date: October 6, 2016
    Inventors: Stefan Parkvall, Lei Wan, Erik Dahlman
  • Publication number: 20160254839
    Abstract: Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different wireless communication devices depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the wireless communication devices in a scheduling grant.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 1, 2016
    Inventors: Erik Dahlman, Ylva Jading, Per Skillermark, Stefan Parkvall
  • Publication number: 20160234839
    Abstract: The technology disclosed provides the ability for a subframe to be configured as a “flexible” subframe. As a result, at least three different types of subframes in a TDD system may be configured: a downlink (“DL”) subframe, an uplink (“UL”) subframe, and a “flexible” subframe. While the DL and UL subframes are preconfigured for each frame instance, the flexible subframes are dynamically allocated to be an uplink subframe in one instance of a frame and a downlink subframe in another instance of the frame.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Inventors: Stefan PARKVALL, David ASTELY, Erik DAHLMAN, Johan NYSTRÖM, Imadur RAHMAN, Yngve SELÉN, Johan SKÖLD
  • Publication number: 20160219526
    Abstract: Transmit power control methods and apparatus are disclosed. In several embodiments, a mobile terminal is configured to effectively ignore “UP” transmit power control commands in the event that the mobile terminal is operating in a power-limited state. In an exemplary method for controlling transmit power at a mobile terminal, a plurality of transmit power control commands are received. An accumulated power control value is adjusted in response to each transmit power control command that directs a negative adjustment in transmit power. However, the accumulated power control value is adjusted in response to a transmit power control command that directs a positive adjustment in transmit power only if the mobile terminal is not in a power-limited state. Transmit power settings for each transmission are calculated based on the accumulated power control value and the one or more radio link parameters.
    Type: Application
    Filed: April 5, 2016
    Publication date: July 28, 2016
    Inventors: Eva Englund, Erik Dahlman, Anders Furuskär, Ylva Jading, Kristina Jersenius, Stefan Parkvall
  • Publication number: 20160211883
    Abstract: Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different mobile terminals depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the mobile terminals in a scheduling grant.
    Type: Application
    Filed: July 18, 2014
    Publication date: July 21, 2016
    Inventors: Erik Dahlman, Ylva Jading, Per Skillermark, Stefan Parkvall
  • Patent number: 9398543
    Abstract: A radio network controller, RNC, 614, and a method therein, for enhancing reception quality of transmissions on an uplink control channel from a user equipment, UE, 613 to a serving base station, BS, 610. The RNC, the UE and the serving BS are comprised in a communication system 600. The method comprises, when conditions for boosting the uplink control channel are fulfilled, determining a boosting factor based on a ratio of path gains of a channel from the UE to the serving BS and of a channel from the UE to a non-serving BS 611, respectively, which non-serving BS is comprised in the communications system. The method further comprises transmitting the determined boosting factor to the UE, whereby the reception quality of transmission on the uplink control channel from the UE to the serving BS is enhanced by the UE boosting the control channel by means of the boosting factor.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: July 19, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Stephen Grant, Erik Dahlman, Andreas Höglund, Stefan Parkvall, Edgar Ramos, Yi-Pin Eric Wang
  • Patent number: 9391683
    Abstract: The available transmission resources on a downlink-shared channel are divided into resource blocks, each resource block comprising a predetermined number of sub-carriers during a predetermined time period. The resource blocks are subdivided into localized resource blocks and distributed resource blocks. A user requiring sufficient resources can be allocated a plurality of said localized resource blocks. A user who would require only a small number of said localized resource blocks can instead be allocated summits of a plurality of said distributed resource blocks.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: July 12, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Stefan Parkvall, Erik Dahlman, Lei Wan
  • Publication number: 20160164708
    Abstract: More than one set of sounding signal configuration parameters are determined for the same mobile terminal. The mobile terminal uses the sets of configuration parameters to generate different sounding reference signals which can be used for different purposes such as estimating timing and channel quality. In one embodiment, a method of configuring uplink sounding transmissions by mobile terminals in a wireless communication network is characterized by determining different sets of configuration parameters for sounding signal transmissions for a given mobile terminal (200). The different sets of configuration parameters are transmitted to the mobile terminal, allowing the mobile terminal to generate different sounding signals for different uses by the wireless communication network (202).
    Type: Application
    Filed: February 18, 2016
    Publication date: June 9, 2016
    Inventors: Erik Dahlman, Ylva Jading, Stefan Parkvall
  • Patent number: 9363778
    Abstract: The present invention relates to a random access process in a cellular communications system and to a user equipment (UE) and a NodeB adapted for performing the process. A problem with the random access is that the time slot for receiving a random access request (RA-request) has a long unused guard portion. When the UE transmits the RA-request, the distance to the receiving NodeB is unknown, and the purpose of the guard portion is to accommodate for propagation delay. The disadvantage is the inefficient use of the random access channel which results in long delays for UEs to access the network. The present invention solves the problem with a method in which the UE position is determined and the distance and propagation delay between the UE and NodeB is calculated before the transmission of the RA-request, and the timing of the transmission is advanced by the propagation delay.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: June 7, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jacobus Haartsen, Erik Dahlman
  • Publication number: 20160157247
    Abstract: It is provided a method for assisting downlink interference estimation in a cellular network. The method is performed in a network node of the cellular network and comprises the steps of: estimating an average transmit power of the network node in a future time period, resulting in a scaling factor indicating the average transmit power of the network node in relation to a reference transmit power of the network node; transmitting, in a resource element allocated to interference estimation, a reference signal for downlink interference estimation with a transmission power which is based on the scaling factor; and refraining from transmitting in a resource element in at least one instance where another network node transmits a reference signal for downlink interference estimation. A corresponding network node, computer program and computer program product for assisting downlink interference estimation are also presented.
    Type: Application
    Filed: July 12, 2013
    Publication date: June 2, 2016
    Inventors: Chrysostomos Koutsimanis, Erik Dahlman