Patents by Inventor David Astely
David Astely 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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Patent number: 11153003Abstract: There is provided mechanisms for generating cell-specific signals using an antenna array with dual-polarized antenna elements. A method is performed by a network device. The method comprises obtaining antenna weights for two sector-specific signals, each sector-specific signal giving rise to a respective sector-specific radiation pattern. The method comprises generating a first cell-specific signal, the first cell-specific signal giving rise to a first cell-specific radiation pattern, wherein antenna weights for the first cell-specific signal are determined such that the radiation pattern matches both sector-specific radiation patterns.Type: GrantFiled: January 21, 2016Date of Patent: October 19, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Andreas Nilsson, David Astely, Niklas Jaldén
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Publication number: 20210306127Abstract: Methods and apparatuses are disclosed for minimization of network node to network node interference in Time Division Duplex (TDD) network. According to one embodiment, a method in a network node for re-mote interference management includes receiving information indicating a position for a reference signal within a communication signal slot, the position being indicated being indicated relative to a reference point associated with a downlink-to-uplink switch; at least one of transmitting the reference signal and receiving the reference signal based at least in part on the received information; and determining whether remote interference is present based at least in part on at least one of the received reference signal and the received information indicating the position of the reference signal.Type: ApplicationFiled: August 7, 2019Publication date: September 30, 2021Inventors: Mårten SUNDBERG, Sebastian FAXÉR, David ASTELY
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Patent number: 11128507Abstract: A method for signal distortion mitigation in a communication device with at least one transmitter in a communication system, generating a signal for transmission for each of the at least one transmitter; performing Peak-to-Average Power Ratio (PAPR) reduction and spectrum shaping of each of the generated signal to provide a distorted signal for transmission; determining signal distortions of the distorted signals, and precoding the determined signal distortions. The method further generating a composite signal for transmission based on the precoded determined signal distortions and the generated signal for transmission, to provide a composite signal, and transmitting the composite signal to at least one receiving communication device, wherein the precoding enables mitigating the signal distortion impact on the at least one receiver.Type: GrantFiled: June 14, 2017Date of Patent: September 21, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Shashi Kant, Eric Nordström, David Astely
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Publication number: 20210282046Abstract: A unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.Type: ApplicationFiled: May 21, 2021Publication date: September 9, 2021Inventors: Yang Hu, David Astely, David Hammarwall, George Jöngren, Xinghua Song, Jianfeng Wang
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Patent number: 11115934Abstract: Some embodiments herein relate to method in a user equipment for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, which user equipment is served by a radio network node in the radio communications network. The user equipment receives, from the radio network node, an indication indicating a set of power control parameters out of multiple sets of power control parameters, which multiple sets of power control parameters are stored at the user equipment. The user equipment determines a transmit power based on the indicated set of power control parameters.Type: GrantFiled: November 11, 2019Date of Patent: September 7, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Erik Eriksson, David Astely
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Patent number: 11108527Abstract: According to an aspect, a wireless device is configured to report, to a base station, channel quality information (CQI) using a predetermined set of CQI index values, where each CQI index value is interpreted by the wireless device and the base station as corresponding to a combination of modulation and coding rate. The wireless device determines, based on a downlink signal configuration, that a first one of the CQI index values corresponds to no modulation and coding rate that can be used for transmissions to the wireless device from the base station. The wireless device transmits the first CQI index value to the base station to signal information other than a combination of modulation and coding rate. The base station receives the first CQI index value and interprets it to signal information other than a combination of modulating and coding rate.Type: GrantFiled: April 19, 2019Date of Patent: August 31, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Sebastian Faxér, Mattias Andersson, Oskar Nordmark, David Astely
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Publication number: 20210266057Abstract: The present disclosure relates to a method performed by a network node for beamforming, to a network node and to a system including a network node. One aspect of the disclosure provides a method (900) comprising: obtaining (910), at the network node (800), information relating to a plurality of signals received or transmitted using a set of receiving beams or a set of transmitting beams of the network node (800), each individual beam of the set having a unique beam direction; determining a set of candidate beams for use by the network node (800) for synchronisation signal, SS, transmission or random access channel, RACH, detection; based on the obtained information, selecting one or more of the determined candidate beams; and using the selected one or more of the determined candidate beams for SS transmission or RACH detection by the network node (800).Type: ApplicationFiled: August 10, 2018Publication date: August 26, 2021Inventors: Henrik Asplund, Arne SIMONSSON, David ASTELY
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Publication number: 20210167841Abstract: There is provided mechanisms for generating cell-specific signals using an antenna array with dual-polarized antenna elements. A method is performed by a network device. The method comprises obtaining antenna weights for two sector-specific signals, each sector-specific signal giving rise to a respective sector-specific radiation pattern. The method comprises generating a first cell-specific signal, the first cell-specific signal giving rise to a first cell-specific radiation pattern, wherein antenna weights for the first cell-specific signal are determined such that the radiation pattern matches both sector-specific radiation patterns.Type: ApplicationFiled: January 21, 2016Publication date: June 3, 2021Applicant: Telefonaktiebolaget LM Ericsson (pubs)Inventors: Andreas NILSSON, David ASTELY, Niklas JALDÉN
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Patent number: 11019526Abstract: A unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.Type: GrantFiled: June 18, 2020Date of Patent: May 25, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICCSON (PUBL)Inventors: Yang Hu, David Astely, David Hammarwall, George Jöngren, Xinghua Song, Jianfeng Wang
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Publication number: 20200389862Abstract: 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: ApplicationFiled: August 25, 2020Publication date: December 10, 2020Inventors: Robert Baldemair, David Astely, Erik Dahlman, Ylva Jading
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Publication number: 20200382261Abstract: According to an aspect, a wireless device is configured to report, to a base station, channel quality information (CQI) using a predetermined set of CQI index values, where each CQI index value is interpreted by the wireless device and the base station as corresponding to a combination of modulation and coding rate. The wireless device determines, based on a downlink signal configuration, that a first one of the CQI index values corresponds to no modulation and coding rate that can be used for transmissions to the wireless device from the base station. The wireless device transmits the first CQI index value to the base station to signal information other than a combination of modulation and coding rate. The base station receives the first CQI index value and interprets it to signal information other than a combination of modulating and coding rate.Type: ApplicationFiled: April 19, 2019Publication date: December 3, 2020Inventors: Sebastian Faxér, Mattias Andersson, Oskar Nordmark, David Astely
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Patent number: 10813120Abstract: A base station in a communications network broadcasts a cell-specific instruction to a plurality of mobile terminals in a cell served by the base station. The cell-specific instruction indicates that an uplink symbol in each of multiple subsequent subframes has been semi-statically configured for sounding reference signal (SRS) transmission. The base station determines that a first mobile terminal of the plurality of mobile terminals is to use the uplink symbol in a given one of the multiple subsequent subframes for aperiodic SRS transmission, and in response, signals a terminal-specific instruction to the first mobile terminal. The terminal-specific instruction is distinct from the cell-specific instruction and indicates that the first mobile terminal is to use the uplink symbol in the given subframe for aperiodic SRS transmission and not for data transmission.Type: GrantFiled: June 28, 2018Date of Patent: October 20, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Ali Behravan, David Astely, George Jöngren
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Publication number: 20200322833Abstract: A unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Inventors: Yang Hu, David Astely, David Hammarwall, George Jöngren, Xinghua Song, Jianfeng Wang
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Patent number: 10791532Abstract: 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: GrantFiled: March 19, 2019Date of Patent: September 29, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Robert Baldemair, David Astely, Erik Dahlman, Ylva Jading
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Patent number: 10734722Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.Type: GrantFiled: June 19, 2017Date of Patent: August 4, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Yang Hu, David Astely, Zhiheng Guo, Imadur Rahman, Hai Wang, Ruiqi Zhang
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Patent number: 10694419Abstract: A unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.Type: GrantFiled: February 20, 2019Date of Patent: June 23, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Yang Hu, David Astely, David Hammarwall, George Jöngren, Xinghua Song, Jianfeng Wang
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Patent number: 10681557Abstract: Operations by a wireless communication network include obtaining information of available cell resources of cells in at least a segment of the wireless communications network, and the current operation state of each cell in the segment. The operations further include obtaining a current traffic demand in the segment, and obtaining previously stored spatial channel characteristics for wireless devices being associated with the cells in the segment. The spatial channel characteristics for at least one wireless device of the wireless device is given between the at least one wireless device and at least two cells in the segment. A determination is then made whether to affect the operation state of at least one of the cells or not according to the information of available cell resources, the current traffic demand, and the previously stored spatial channel characteristics.Type: GrantFiled: October 23, 2015Date of Patent: June 9, 2020Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: David Astely, Henrik Asplund, Niklas Jaldén
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Patent number: 10659205Abstract: According to one aspect of the teachings herein, a base station (20) schedules the transmission of uplink reference signals by a wireless device (16) separately from scheduling uplink data transmissions by the device (16). The separate scheduling may be done at specific times, under specific conditions, and with respect to specific devices (16) or groups of devices (16). Separate scheduling allows, for example, the base station (20) to use smaller scheduling intervals that are possible when uplink reference signals are integrally included in any scheduled uplink data transmission. As a further advantage, the density or number of uplink reference signal transmissions by a given device (16) can be adapted, e.g., based on channel conditions, data transmission formats, etc.Type: GrantFiled: August 10, 2016Date of Patent: May 19, 2020Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Mattias Andersson, Niklas Andgart, David Astely, Helka-Liina Määttanen, Henrik Sahlin
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Patent number: 10631270Abstract: Method in a user equipment, a user equipment, a method in a base station and a base station for setting values of system parameters used within a wireless communication system. A first set of parameter values and an associated first tag is sent from the base station to be received and stored by the user equipment. Further, a second set of parameter values and an associated second tag is sent from the base station to be received and stored by the user equipment. When the base station determines to change system information parameters, a command tag is sent, to be received by the user equipment, which apply the set of parameter values associated with the tag corresponding to the received command tag.Type: GrantFiled: May 4, 2017Date of Patent: April 21, 2020Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Mats Sågfors, David Astely, Stefan Parkvall, Riikka Susitaival
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Publication number: 20200120666Abstract: Embodiments herein include a method in a user equipment (UE) for transmitting uplink control information in time slots of a subframe over a radio channel to a radio base station. The uplink control information is comprised in a block of bits. The UE maps the block of bits to a sequence of complex valued modulation symbols. The UE block spreads the sequence across Discrete Fourier Transform Spread-Orthogonal Frequency Division Multiplexing (DFTS-OFDM) symbols. This is performed by applying a spreading sequence to the sequence of complex valued modulation symbols, to achieve a block spread sequence of complex valued modulation symbols. The UE further transforms the block-spread sequence, per DFTS-OFDM symbol. This is performed by applying a matrix that depends on a DFTS-OFDM symbol index and/or slot index to the block-spread sequence. The UE also transmits the block spread sequence, as transformed, over the radio channel to the radio base station.Type: ApplicationFiled: December 16, 2019Publication date: April 16, 2020Inventors: Robert Baldemair, David Astely, Dirk Gerstenberger, Daniel Larsson, Stefan Parkvall