Patents by Inventor Torbjorn Elfstrom
Torbjorn Elfstrom 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).
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Publication number: 20230327784Abstract: There is provided mechanisms for OTA based estimation of phase accuracy of a first radio transceiver device. A method is performed by a controller. The method comprises obtaining, per each position in a sequence of positions of a second radio transceiver device relative the first radio transceiver device, a phase relation estimate between transceiver branches of the first radio transceiver device. Each phase relation estimate is obtained from measurements on a signal wirelessly transmitted between the first radio transceiver device and the second radio transceiver device. The method comprises estimating an average phase relation for at least one pair of the transceiver branches of the first radio transceiver device by averaging the obtained phase relation estimates over all the positions in the sequence of positions. The phase accuracy of the first radio transceiver device is represented by the average phase relation for the at least one pair of the transceiver branches.Type: ApplicationFiled: August 25, 2020Publication date: October 12, 2023Inventors: Lars Persson, Torbjörn Elfström, Christer Engdahl
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Publication number: 20230296715Abstract: There is provided mechanisms for determining direction of a second radio transceiver device with respect to a first radio transceiver device. The first radio transceiver device is configured to communicate with beams in a beam set. A method is performed by a processing unit. The method comprises obtaining a vector of radio parameter measurements from measurements performed on a radio link between the first radio transceiver device and the second radio transceiver device for one and the same location of the second radio transceiver device. The vector comprises a radio parameter measurement per each beam in the beam set. The method comprises determining the direction of the second radio transceiver device with respect to the first radio transceiver device by comparing the vector of radio parameter measurements to a set of candidate direction profiles.Type: ApplicationFiled: August 20, 2020Publication date: September 21, 2023Inventors: Sam Agneessens, Torbjörn Elfström, Jonas Fridén, Aidin Razavi
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Patent number: 11764843Abstract: There is provided mechanisms for adapting beamformed transmission from a base station. A method is performed by a control node. The control node is configured to control the beamformed transmission. The method comprises obtaining a first piece of information indicative of distance to, and direction towards, a radio communication site relative the base station. The method comprises obtaining a second piece of information indicative of operating radio frequency band of the radio communication site. The method comprises adapting the beamformed transmission so as to keep emission from the base station in the direction towards the radio communication site that contributes within the operating radio frequency band of the radio communication site within a prescribed limit.Type: GrantFiled: December 13, 2018Date of Patent: September 19, 2023Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Ralf Schuh, Jonas Fridén, Christian Bergljung, Torbjörn Elfström, Johan Thorebäck
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Publication number: 20230232258Abstract: There is provided mechanisms for enabling OTA estimation of a radio frequency parameter of a radio transmitter during a test time interval. The radio transmitter is configured for transmission in a set of beams. A method is performed by a controller of the radio transmitter. The method comprises identifying a subset of beams in the set of beams that, during the test time interval, are unused for transmission of scheduled signals. The method comprises instructing the radio transmitter to transmit, during the test time interval, an unscheduled signal in the subset of beams, whilst also transmitting the scheduled signals in those beams of the set of beams that are used for transmission of the scheduled signals, for enabling estimation of the radio frequency parameter of the radio transmitter.Type: ApplicationFiled: June 23, 2020Publication date: July 20, 2023Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn ELFSTRÖM, Jonas FRIDÉN, Aidin RAZAVI, Sam AGNEESSENS
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Patent number: 11659498Abstract: A method of declaring Equivalent Isotropically Radiated Power (EIRP) for an operating frequency band of a base station. The method includes: declaring a first EIRP for a first frequency of the operating frequency band, declaring a second EIRP for a second frequency of the operating frequency band, and declaring a third EIRP for a third frequency of the operating frequency band, wherein the third frequency is between the first frequency and the second frequency, and wherein the second frequency is higher than the first frequency.Type: GrantFiled: October 24, 2019Date of Patent: May 23, 2023Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Farshid Ghasemzadeh
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Publication number: 20230051120Abstract: There is provided mechanisms for performance degradation handling between a first radio access network node that operates in a first frequency band and provides network access for subscribers of a first mobile network operator and a second radio access network node that operates in a second frequency band and provides network access for subscribers of a second mobile network operator. A method is performed by the first radio access network node. The method comprises identifying performance degradation impacting the network access for the subscribers of the first mobile network operator. The performance degradation is identified as originating from a particular direction relative the first radio access network node and as caused by the second radio access network node. The method comprises providing, towards the second radio access network node, an indication of the performance degradation.Type: ApplicationFiled: February 6, 2020Publication date: February 16, 2023Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ralf SCHUH, Torbjörn ELFSTRÖM, Johan THOREBÄCK, Christian BERGLJUNG
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Publication number: 20220330058Abstract: There is provided mechanisms for OTA estimation of an RF parameter of a radio transmitter. A method is performed by a measurement equipment. The method comprises obtaining information of spatial radiation pattern used by the radio transmitter and power allocation used by the radio transmitter for transmission of a signal using the spatial radiation pattern. The method comprises obtaining a measurement of at least one of signal power and signal frequency of the signal as transmitted from the radio transmitter by measuring on the signal. The measurement is made with respect to spatial orientations and distance between the radio transmitter and the measurement equipment. The method comprises estimating the RF parameter for the signal transmitted by the radio transmitter from the measurement and using the information of spatial radiation pattern, power allocation, and spatial orientations and distance.Type: ApplicationFiled: August 28, 2019Publication date: October 13, 2022Inventors: Lars Persson, Christer Engdahl, Torbjörn Elfström
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Patent number: 11337089Abstract: The embodiments herein relate to a method performed by a first node (101) for enabling testing of at least a part (105, 108) of the first node (101) in a deployed network. The first node (101) determines that at least a part (105, 108) of the first node (101) should be tested, and determines a direction in which to transmit or receive a test signal (200) to or from a second node (103). The first node (101) transmits the test signal (200) OTA in the determined direction to the second node (103) if a transmitter of the first node (101) should be tested. The first node (101) receives the test signal (200) OTA in the determined direction from the second node (103) if a receiver of the first node (101) should be tested.Type: GrantFiled: October 26, 2017Date of Patent: May 17, 2022Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Joakim Axmon, Thomas Chapman, Esther Sienkiewicz
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Publication number: 20220077939Abstract: The present disclosure relates to a system (1) for measurement of antenna alignment of an array antenna system (2) used for wireless communication. The array antenna system (2) has an antenna position (A) relative a first coordinate system (18) and comprises a control unit (3) and an array antenna (4) having an antenna aperture plane (19), a certain coverage (5) and an initial array antenna orientation (B). The array antenna (4) further comprises a plurality of antenna elements (6) and at least two antenna ports (7, 8, 9, 10), each antenna port (7, 8, 9, 10) being connected to a corresponding subarray (11, 12, 13, 14), each subarray (11, 12, 13, 14) comprising at least one antenna element (6). The system (1) comprises the array antenna system (2) and an unmanned aerial vehicle (15), UAV, arranged to be deployed in the coverage (5) and comprising a UAV antenna arrangement (16) and a positioning module (17) that is adapted to provide UAV position information (C) relative the first coordinate system (18).Type: ApplicationFiled: December 18, 2018Publication date: March 10, 2022Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn ELFSTRÖM, Lars PERSSON, Christer ENGDAHL
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Publication number: 20220069878Abstract: There is provided mechanisms for adapting beamformed transmission from a base station. A method is performed by a control node. The control node is configured to control the beamformed transmission. The method comprises obtaining a first piece of information indicative of distance to, and direction towards, a radio communication site relative the base station. The method comprises obtaining a second piece of information indicative of operating radio frequency band of the radio communication site. The method comprises adapting the beamformed transmission so as to keep emission from the base station in the direction towards the radio communication site that contributes within the operating radio frequency band of the radio communication site within a prescribed limit.Type: ApplicationFiled: December 13, 2018Publication date: March 3, 2022Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ralf SCHUH, Jonas FRIDÉN, Christian BERGLJUNG, Torbjörn ELFSTRÖM, Johan THOREBÄCK
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Patent number: 11223408Abstract: A method performed by a network node for determining a beam to be transmitted to at least a first User Equipment, UE is provided. The network node determines (903) a beam to be transmitted to at least a first UE based on an obtained average spatial profile of radiated power in each direction. The average spatial profile of radiated power is based on an spatial profile of radiated power averaged over any one or more out of a frequency interval and a time interval.Type: GrantFiled: September 23, 2016Date of Patent: January 11, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Thomas Chapman, Torbjörn Elfström, Farshid Ghasemzadeh, Esther Sienkiewicz
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Publication number: 20210385762Abstract: A method of declaring Equivalent Isotropically Radiated Power (EIRP) for an operating frequency band of a base station. The method includes: declaring a first EIRP for a first frequency of the operating frequency band, declaring a second EIRP for a second frequency of the operating frequency band, and declaring a third EIRP for a third frequency of the operating frequency band, wherein the third frequency is between the first frequency and the second frequency, and wherein the second frequency is higher than the first frequency.Type: ApplicationFiled: October 24, 2019Publication date: December 9, 2021Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn ELFSTRÖM, Farshid GHASEMZADEH
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Patent number: 11101899Abstract: The embodiments herein relate to a method performed by a communication node (103) for enabling OTA testing. The communication node (103) comprises at least one active antenna (310). The communication node (103) transmits a test signal OTA by emitting a radiation pattern from the active antenna (310). The active antenna (310) scans two or more directions when emitting the radiation pattern.Type: GrantFiled: March 22, 2018Date of Patent: August 24, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Aurelian Bria, Jonas Fridén, Elena Pucci, Aidin Razavi, Anders Stjernman
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Patent number: 11063676Abstract: The embodiments herein relate to a method performed by a testing device for enabling testing of a communication node. The testing device measures a test parameter associated with RF characteristics of the communication node when it is located at a test location during a first condition. The communication node is configured with a node setting during the measurement in the first condition. The testing device measures the test parameter associated with the RF characteristics of the communication node when it is located at the test location during a second condition. The communication node is configured with the same node setting in the second condition as in the first condition. The testing device checks whether a result parameter associated with the test parameter measured during the first and second condition fulfills a requirement.Type: GrantFiled: April 8, 2020Date of Patent: July 13, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Ove Nilsson, Lars Persson, Moritz Saarman
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Patent number: 10784972Abstract: A method and apparatus for performing TRP measurements of an antenna system uses a sampling grid that takes into account the spherical geometry and the directivity of the antenna under test, while considering test time. The optimization of the sampling grid balances the trade-off between reducing the number of samples to reduce test time, and ensuring accuracy of the TRP estimates.Type: GrantFiled: August 16, 2017Date of Patent: September 22, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Joakim Axmon, Thomas Chapman, Torbjörn Elfström, Esther Sienkiewicz
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Publication number: 20200235826Abstract: The embodiments herein relate to a method performed by a testing device for enabling testing of a communication node. The testing device measures a test parameter associated with RF characteristics of the communication node when it is located at a test location during a first condition. The communication node is configured with a node setting during the measurement in the first condition. The testing device measures the test parameter associated with the RF characteristics of the communication node when it is located at the test location during a second condition. The communication node is configured with the same node setting in the second condition as in the first condition. The testing device checks whether a result parameter associated with the test parameter measured during the first and second condition fulfills a requirement.Type: ApplicationFiled: April 8, 2020Publication date: July 23, 2020Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn Elfström, Ove Nilsson, Lars Persson, Moritz Saarman
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Patent number: 10659174Abstract: The embodiments herein relate to a method performed by a testing device for enabling testing of a communication node. The testing device measures a test parameter associated with RF characteristics of the communication node when it is located at a test location during a first condition. The communication node is configured with a node setting during the measurement in the first condition. The testing device measures the test parameter associated with the RF characteristics of the communication node when it is located at the test location during a second condition. The communication node is configured with the same node setting in the second condition as in the first condition. The testing device checks whether a result parameter associated with the test parameter measured during the first and second condition fulfills a requirement.Type: GrantFiled: July 17, 2019Date of Patent: May 19, 2020Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn Elfström, Ove Nilsson, Lars Persson, Moritz Saarman
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Publication number: 20200021349Abstract: A method performed by a network node for determining a beam to be transmitted to at least a first User Equipment, UE is provided. The network node determines (903) a beam to be transmitted to at least a first UE based on an obtained average spatial profile of radiated power in each direction. The average spatial profile of radiated power is based on an spatial profile of radiated power averaged over any one or more out of a frequency interval and a time interval.Type: ApplicationFiled: September 23, 2016Publication date: January 16, 2020Inventors: Thomas Chapman, Torbjörn Elfström, Farshid Ghasemzadeh, Esther Sienkiewicz
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Publication number: 20190342015Abstract: The embodiments herein relate to a method performed by a testing device for enabling testing of a communication node. The testing device measures a test parameter associated with RF characteristics of the communication node when it is located at a test location during a first condition. The communication node is configured with a node setting during the measurement in the first condition. The testing device measures the test parameter associated with the RF characteristics of the communication node when it is located at the test location during a second condition. The communication node is configured with the same node setting in the second condition as in the first condition. The testing device checks whether a result parameter associated with the test parameter measured during the first and second condition fulfills a requirement.Type: ApplicationFiled: July 17, 2019Publication date: November 7, 2019Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Ove NILSSON, Lars PERSSON, Moritz SAARMAN
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Patent number: 10389455Abstract: The embodiments herein relate to a method performed by a testing device (101) for enabling testing of a communication node (103). The testing device (101) measures a test parameter associated with RF characteristics of the communication node (103) when it is located at a test location (105) during a first condition. The communication node (103) is configured with a node setting during the measurement in the first condition. The testing device (101) measures the test parameter associated with the RF characteristics of the communication node (103) when it is located at the test location (105) during a second condition. The communication node (103) is configured with the same node setting in the second condition as in the first condition. The testing device (101) checks whether a result parameter associated with the test parameter measured during the first and second condition fulfills a requirement.Type: GrantFiled: July 11, 2016Date of Patent: August 20, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Elfström, Ove Nilsson, Lars Persson, Moritz Saarman