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).

  • Network architecture, methods, and devices for a wireless communications network
    Patent number: 10938497
    Abstract: Methods and apparatus in a fifth-generation wireless communications, including an example method, in a wireless device, that includes receiving a downlink signal comprising an uplink access configuration index, using the uplink access configuration index to identify an uplink access configuration from among a predetermined plurality of uplink access configurations, and transmitting to the wireless communications network according to the identified uplink access configuration. The example method further includes, in the same wireless device, receiving, in a first subframe, a first Orthogonal Frequency-Division Multiplexing (OFDM) transmission formatted according to a first numerology and receiving, in a second subframe, a second OFDM transmission formatted according to a second numerology, the second numerology differing from the first numerology. Variants of this method, corresponding apparatuses, and corresponding network-side methods and apparatuses are also disclosed.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: March 2, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Parkvall, Janne Peisa, Gunnar Mildh, Robert Baldemair, Stefan Wager, Jonas Kronander, Karl Werner, Richard Abrahamsson, Ismet Aktas, Peter Alriksson, Junaid Ansari, Shehzad Ali Ashraf, Henrik Asplund, Fredrik Athley, Håkan Axelsson, Joakim Axmon, Johan Axnäs, Kumar Balachandran, Gunnar Bark, Jan-Erik Berg, Andreas Bergström, Håkan Björkegren, Nadia Brahmi, Cagatay Capar, Anders Carlsson, Andreas Cedergren, Mikael Coldrey, Icaro L. J. da Silva, Erik Dahlman, Ali el Essaili, Ulrika Engström, Mårten Ericson, Erik Eriksson, Mikael Fallgren, Rui Fan, Gabor Fodor, Pål Frenger, Jonas Fridén, Jonas Fröberg Olsson, Anders Furuskär, Johan Furuskog, Virgile Garcia, Ather Gattami, Fredrik Gunnarsson, Ulf Gustavsson, Bo Hagerman, Fredrik Harrysson, Ning He, Martin Hessler, Kimmo Hiltunen, Songnam Hong, Dennis Hui, Jörg Huschke, Tim Irnich, Sven Jacobsson, Niklas Jaldén, Simon Järmyr, Zhiyuan Jiang, Niklas Johansson, Martin Johansson, Du Ho Kang, Eleftherios Karipidis, Patrik Karlsson, Ali S. Khayrallah, Caner Kilinc, Göran N. Klang, Sara Landstrom, Christina Larsson, Gen Li, Lars Lindbom, Robert Lindgren, Bengt Lindoff, Fredrik Lindqvist, Jinhua Liu, Thorsten Lohmar, Qianxi Lu, Lars Manholm, Ivana Maric, Jonas Medbo, Qingyu Miao, Reza Moosavi, Walter Müller, Elena Myhre, Karl Norrman, Bengt-Erik Olsson, Torgny Palenius, Sven Petersson, Jose Luis Pradas, Mikael Prytz, Olav Queseth, Pradeepa Ramachandra, Edgar Ramos, Andres Reial, Thomas Rimhagen, Emil Ringh, Patrik Rugeland, Johan Rune, Joachim Sachs, Henrik Sahlin, Vidit Saxena, Nima Seifi, Yngve Selén, Eliane Semaan, Sachin Sharma, Cong Shi, Johan Sköld, Magnus Stattin, Anders Stjernman, Dennis Sundman, Lars Sundström, Miurel Isabel Tercero Vargas, Claes Tidestav, Sibel Tombaz, Johan Torsner, Hugo Tullberg, Jari Vikberg, Peter von Wrycza, Thomas Walldeen, Pontus Wallentin, Hai Wang, Ke Wang Helmersson, Jianfeng Wang, Yi-Pin Eric Wang, Niclas Wiberg, Emma Wittenmark, Osman Nuri Can Yilmaz, Ali Zaidi, Zhan Zhang, Zhang Zhang, Yanli Zheng
  • Code-Rate-Dependent Modulation Techniques
    Publication number: 20210036801
    Abstract: A modulation technique, such as for example either Pi/2 BPSK or QPSK, is selected for transmission, based on a characteristic of the data to be transmitted, or the physical channel over which it is to be transmitted. The data characteristic may be the coding rate, or characteristics indirectly related to the coding rate, such as the number of coded bits or number of uncoded bits (payload size). The physical channel characteristic may for example be the physical channel bandwidth, the physical channel length, a number of physical channel modulation symbols, a number of the physical channel resource elements used for the data to be transmitted, or a number of the physical channel modulation symbols carrying the data to be transmitted.
    Type: Application
    Filed: September 13, 2018
    Publication date: February 4, 2021
    Applicant: Telefonaktiebolaget LM Ericsson (PUBL)
    Inventors: Robert BALDEMAIR, Erik DAHLMAN, Sorour FALAHATI, Havish KOORAPATY, Stefan PARKVALL
  • Resource Mapping Based on Bandwidth Part
    Publication number: 20210036836
    Abstract: There is disclosed a method of operating a user equipment in a radio access network, the user equipment being configured with a set of bandwidth parts, the user equipment being operable for communicating utilising an activated bandwidth part of the set of bandwidth part. The set of bandwidth parts comprises a first bandwidth part and a second bandwidth part, the first bandwidth part of the set being associated to a first set of characteristics, the second bandwidth part of the set being associated to a second set of characteristics. Further, the first set of characteristics and the second set of characteristics comprise at least one characteristic different between the first set and the second set of characteristics. The user equipment (10) further operates with a common search space for control signaling, the common search space being included in the first bandwidth part and the second bandwidth part.
    Type: Application
    Filed: February 16, 2018
    Publication date: February 4, 2021
    Inventors: Erik Dahlman, Robert Baldemair, Daniel Chen Larsson, Sorour Falahati, Stefan Parkvall
  • PHYSICAL UPLINK SHARED CHANNEL (PUSCH) FREQUENCY HOPPING ALLOCATION
    Publication number: 20210028815
    Abstract: A method and apparatus are disclosed. A wireless device (WD) configured to communicate with a network node is provided. The WD includes a radio interface and processing circuitry configured to: if a configured frequency hopping distance results in a resource allocation at two edges of a slot, apply a modified resource allocation that avoids resource allocation at two bandwidth part, BWP, edges. The modified resource allocation corresponds to a frequency hopping distance different from the configured frequency hopping distance. The radio interface and/or processing circuitry is further configured to transmit using the modified resource allocation.
    Type: Application
    Filed: February 18, 2019
    Publication date: January 28, 2021
    Inventors: Robert BALDEMAIR, Daniel CHEN LARSSON, Erik DAHLMAN, Sorour FALAHATI, Stefan PARKVALL
  • Prefixing of OFDM Symbols to Support Variable Subframe Length
    Publication number: 20210014093
    Abstract: The present disclosure relates to a first radio node configured for orthogonal frequency division multiplexing (OFDM), comprising a receiver, a transmitter, a processor and a memory storing instructions executable by the processor for causing the transmitter in a first mode of operation with a first subcarrier spacing f1: to transmit a sequence of prefixed OFDM symbols, and in a second mode of operation with a second subcarrier spacing f2: to transmit a sequence of prefixed OFDM symbols, wherein the sequence of transmitted OFDM symbols is aligned with a predefined repeating radio frame, which is common to both the first and second modes of operation, or with an integer multiple of the predefined repeating radio frame; and the first and second subcarrier spacings are related by an integer factor, f1/f2=p or f1/f2=1/p, with p?1 integer.
    Type: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Inventors: Stefan Parkvall, Erik Dahlman, Asbjörn Grövlen
  • RESOURCE MAPPING BASED ON BANDWIDTH PART
    Publication number: 20200404686
    Abstract: There is disclosed a method of operating a user equipment in a radio access network, the method including communicating based on a control information message received while operating on a first bandwidth part; wherein the control information message represents a bit pattern; wherein the bit pattern is interpreted differently depending on whether the control information message indicates switch to operating on a second bandwidth part or not. The disclosure also pertains to related devices or methods.
    Type: Application
    Filed: February 17, 2018
    Publication date: December 24, 2020
    Inventors: Robert BALDEMAIR, Daniel CHEN LARSSON, Erik DAHLMAN, Sorour FALAHATI, Stefan PARKVALL
  • ACKNOWLEDGEMENT SIGNALING PROCESSES FOR RADIO ACCESS NETWORKS
    Publication number: 20200396029
    Abstract: A method of operating a target radio node in a radio access network is disclosed. The method includes receiving control information transmitted on a control channel, and transmitting acknowledgement feedback pertaining to the control information. The disclosure also pertains to related methods and devices.
    Type: Application
    Filed: November 14, 2017
    Publication date: December 17, 2020
    Inventors: Robert BALDEMAIR, Ali BEHRAVAN, Daniel CHEN LARSSON, Erik DAHLMAN, Sorour FALAHATI, Stefan PARKVALL
  • Methods and Arrangements in a Telecommunications Network
    Publication number: 20200389862
    Abstract: The present invention relates to methods and arrangements in a base station and a user equipment for determining an uplink transmission timing correction for communication in a telecommunication system in which aggregation of component carriers is applied. The base station receives a signal from the user equipment on an uplink (UL) component carrier and measures the arrival time of the signal. A timing correction of the UL transmission timing based on the arrival time of the signal is determined. Thereupon the base station determines for which of the uplink component carriers used by the user equipment the timing correction is valid. The timing correction and the validity information is sent to the user equipment. The user equipment adjusts the UL transmission timing for each UL component carrier the timing correction is valid for.
    Type: Application
    Filed: August 25, 2020
    Publication date: December 10, 2020
    Inventors: Robert Baldemair, David Astely, Erik Dahlman, Ylva Jading
  • HARQ CODEBOOK STRUCTURE
    Publication number: 20200374041
    Abstract: There is disclosed a method of operating a user equipment in a radio access network. The method includes transmitting acknowledgement information reporting on subject transmissions based on a HARQ codebook. The HARQ codebook indicates a bit pattern of the acknowledgement information. The bit pattern has a plurality of subpatterns, each subpattern being associated to a different subdivision of a reception time interval to which the acknowledgement information pertains. Each subpattern includes a predetermined number of bits of acknowledgement information associated to subject transmissions of the subdivision. There are also disclosed related methods and devices.
    Type: Application
    Filed: February 16, 2018
    Publication date: November 26, 2020
    Inventors: Sorour FALAHATI, Robert BALDEMAIR, Daniel CHEN LARSSON, Erik DAHLMAN, Stefan PARKVALL
  • Improvements Related to Random Access in Wireless Communications
    Publication number: 20200367288
    Abstract: There is provided a method, performed by a wireless device in a wireless communication system, for receiving a random access response, RAR, message from a network node. The method comprises transmitting (S11) a selected random access preamble to the network node, the selected preamble being linked to specific downlink, DL, resources to be used for communicating the RAR message from the network node to the wireless device, and receiving (S13) the RAR message from the network node on the specific DL resources. There is also provided a corresponding method performed by a network node, as well as wireless devices and network nodes and computer programs and corresponding carriers.
    Type: Application
    Filed: October 30, 2018
    Publication date: November 19, 2020
    Inventors: Erik DAHLMAN, Roert BALDEMAIR, Stefan PARKVALL
  • FLEXIBLE TRANSMISSION GRID
    Publication number: 20200359365
    Abstract: A system and method for scheduling a transmission of an uplink message in a communication system. An example method includes scheduling transmission of an uplink message having a duration less than a subframe length and receiving the uplink message. In certain embodiments, the uplink message may be scheduled to begin with a symbol that is between boundaries of a subframe, span a boundary between the subframe and a subsequent subframe, and end with another symbol that is between boundaries of the subsequent subframe.
    Type: Application
    Filed: July 24, 2020
    Publication date: November 12, 2020
    Inventors: Stefan Parkvall, Robert Baldemair, Erik Dahlman
  • FEEDBACK SIGNALING PROCESSES FOR RADIO ACCESS NETWORKS
    Publication number: 20200359391
    Abstract: There is disclosed a method of operating a user equipment in a radio access network, the user equipment being configured with a feedback configuration of transmission of feedback signaling by the user equipment. The feedback signaling pertains to subject transmission. The feedback configuration indicates transmission of feedback signaling on a first carrier with a first numerology and according to a configured transmission timing. The method includes transmitting the feedback signaling at an updated transmission timing which is later in time than the configured transmission timing if the configured transmission timing is within a signaling time interval of transmission, by the user equipment, of second signaling on the first carrier. The disclosure also pertains to related methods and devices.
    Type: Application
    Filed: November 16, 2017
    Publication date: November 12, 2020
    Inventors: Robert BALDEMAIR, Ali BEHRAVAN, Daniel CHEN LARSSON, Erik DAHLMAN, Sorour FALAHATI, Stefan PARKVALL
  • NUMEROLOGY INDICATION FOR RADIO ACCESS NETWORKS
    Publication number: 20200358584
    Abstract: There is disclosed a method of operating a network node in a radio access network. The method includes transmitting first numerology information indicating a first numerology for a carrier, the first numerology having a first subcarrier spacing and a first frequency reference. The method also includes transmitting a frequency shift indication indicating a second frequency reference for a second numerology for the same carrier, the frequency shift indication indicating the second frequency reference in relation to the first frequency reference. The disclosure also pertains to related methods and devices.
    Type: Application
    Filed: November 28, 2017
    Publication date: November 12, 2020
    Inventors: Robert BALDEMAIR, Erik DAHLMAN, Asbjörn GRÖVLEN, Stefan PARKVALL
  • Determining Starting Positions for Uplink Transmissions
    Publication number: 20200351914
    Abstract: The disclosure relates to a method (50), implemented at a radio network node, of determining a starting symbol for a scheduled uplink transmission by User Equipment, UE. The method comprises selecting (52) a starting symbol within an uplink slot for a scheduled uplink transmission by a UE; and identifying (54) the starting symbol to the UE.
    Type: Application
    Filed: March 26, 2018
    Publication date: November 5, 2020
    Inventors: Erik Dahlman, Robert Baldemair, Stefan Parkvall
  • Transmission holes in longer transmission intervals
    Patent number: 10820339
    Abstract: In an aspect, a transmitting node schedules a downlink transmission to a first UE over a first transmission interval having a predetermined length and starts the downlink transmission to the first UE in the first transmission interval. The transmitting node stops the downlink transmission to the first UE prior to an end of the first transmission interval to create a first end of a transmission hole in the downlink transmission to the first UE and resumes the downlink transmission to the first UE at a second end of the transmission hole. The transmitting node may receive an uplink transmission from a second UE or transmit a higher priority transmission, within the transmission hole.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: October 27, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Stefan Parkvall, Robert Baldemair, Håkan Björkegren, Erik Dahlman, Karl Werner
  • Resource allocation for data transmission in wireless systems
    Patent number: 10797918
    Abstract: Techniques are disclosed for allocating time-frequency resources in a system that uses multiple multicarrier modulation numerologies. According to one aspect, a method in a first wireless node comprises allocating (1310) time-frequency resources for use by a second wireless node, where said allocating comprises selecting, for use in multicarrier modulation in the allocated time-frequency resources, one of two or more subcarrier bandwidths that the second wireless node is adapted to use for modulating or demodulating of data. In some embodiments, the method further comprises sending (1320) resource allocation information to the second wireless node, the resource allocation information identifying the allocated time-frequency resources.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: October 6, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Robert Baldemair, Håkan Björkegren, Erik Dahlman, Stefan Parkvall, Karl Werner
  • Prefixing of OFDM symbols to support variable subframe length
    Patent number: 10797922
    Abstract: The present disclosure relates to a first radio node configured for orthogonal frequency division multiplexing (OFDM), comprising a receiver, a transmitter, a processor and a memory storing instructions executable by the processor for causing the transmitter in a first mode of operation with a first subcarrier spacing f1: to transmit a sequence of prefixed OFDM symbols, and in a second mode of operation with a second subcarrier spacing f2: to transmit a sequence of prefixed OFDM symbols, wherein the sequence of transmitted OFDM symbols is aligned with a predefined repeating radio frame, which is common to both the first and second modes of operation, or with an integer multiple of the predefined repeating radio frame; and the first and second subcarrier spacings are related by an integer factor, f1/f2=p or f1/f2=1/p, with p?1 integer.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: October 6, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Stefan Parkvall, Erik Dahlman, Asbjörn Grövlen
  • Methods and arrangements in a telecommunications network
    Patent number: 10791532
    Abstract: The present invention relates to methods and arrangements in a base station and a user equipment for determining an uplink transmission timing correction for communication in a telecommunication system in which aggregation of component carriers is applied. The base station receives a signal from the user equipment on an uplink (UL) component carrier and measures the arrival time of the signal. A timing correction of the UL transmission timing based on the arrival time of the signal is determined. Thereupon the base station determines for which of the uplink component carriers used by the user equipment the timing correction is valid. The timing correction and the validity information is sent to the user equipment. The user equipment adjusts the UL transmission timing for each UL component carrier the timing correction is valid for.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: September 29, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Robert Baldemair, David Astely, Erik Dahlman, Ylva Jading
  • ALLOCATION OF ACKNOWLEDGEMENT RESOURCES
    Publication number: 20200296721
    Abstract: Systems and methods are provided for allocation of acknowledgement resources. In an embodiment, a method of transmitting control information to a communication network may be implemented in a wireless device. The method may include being configured with at least two physical uplink control channel (PUCCH) opportunities, each of the at least two PUCCH opportunities identifying uplink resources to be used for transmitting control information to the communication network. The method may further include receiving an acknowledgement resource indication (ARI) indicating one of the configured at least two PUCCH opportunities to be used for transmitting control information associated with the DL transmission.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Inventors: Robert BALDEMAIR, Erik DAHLMAN, Sorour FALAHATI, Daniel LARSSON, Stefan PARKVALL
  • Methods and apparatuses for enabling a wireless device to communicate with a radio network node in an unlicensed spectrum
    Patent number: 10779228
    Abstract: A wireless device, a radio network node, and methods therefor, for communicating in a network. The wireless device is configured to determine one or more possible first sequences of a discovery signal. The wireless device is configured to receive a second sequence of the discovery signal, and to determine if the one or more possible first sequences match the second sequence.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: September 15, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Parkvall, Erik Dahlman