Patents by Inventor Ari Kangas
Ari Kangas 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: 11985087Abstract: Disclosed is a method for synchronizing transmission of signals from antenna reference points, ARP, (121, 122) of a wireless communication network (100). The method comprises initiating transmission of a first synchronization reference signal from a first ARP (121) at a first time point, instructing a second ARP (122) to determine a second time point for reception of the first synchronization reference signal, initiating transmission of a second synchronization reference signal from the second ARP (122) at a third time point, and instructing the first ARP to determine a fourth time point for reception of the second synchronization reference signal. The first and the second synchronization references signals are either transmitted in uplink communication resources available or they are transmitted in downlink communication resources.Type: GrantFiled: April 15, 2019Date of Patent: May 14, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Alexandra Mikaelsson, Ari Kangas, Avneesh Vyas, Obada Alhaj Moussa
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Patent number: 11848732Abstract: A method for wireless backhaul inter-node communication between a first backhaul node and a second backhaul node is provided. The method includes computing a beamforming weight matrix W; and the first backhaul node using the beamforming weight matrix W to transmit and/or receive data to and/or from the second backhaul node. The beamforming matrix W is computed as the inverse of a weighted channel estimate matrix (Formula I), such that W=(Formula II), where ? is a channel estimate matrix and ? is a weighting factor matrix such that (Formula III) where ? has dimension Nrx by Ntx, where Nrx is the number of receive antennas and Ntx is the number of transmit antennas, where Ntx,=Nrx, and ? is a scalar between 0 and 1, and where ? denotes a Hadamard matrix product.Type: GrantFiled: September 27, 2018Date of Patent: December 19, 2023Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Wigren, Ari Kangas
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Publication number: 20220190976Abstract: Disclosed is a method for synchronizing transmission of signals from antenna reference points, ARP, (121, 122) of a wireless communication network (100). The method comprises initiating transmission of a first synchronization reference signal from a first ARP (121) at a first time point, instructing a second ARP (122) to determine a second time point for reception of the first synchronization reference signal, initiating transmission of a second synchronization reference signal from the second ARP (122) at a third time point, and instructing the first ARP to determine a fourth time point for reception of the second synchronization reference signal. The first and the second synchronization references signals are either transmitted in uplink communication resources available or they are transmitted in downlink communication resources.Type: ApplicationFiled: April 15, 2019Publication date: June 16, 2022Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Alexandra MIKAELSSON, Ari KANGAS, Avneesh VYAS, Obada ALHAJ MOUSSA
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Patent number: 11283536Abstract: A method and a network node (700) serving a first cell in a wireless network, for reducing interference in a second cell caused by transmission of reference signals in the first cell. The network node (700) transmits (7:2) in the first cell a scheduling block where a number of said reference signals are located in predefined resource element positions in the scheduling block, using a time offset relative transmission of a scheduling block in the second cell. Thereby, the impact of interference from a reference signal from one network node will be distributed over several resource elements in the other network node so that the impact in each resource element is reduced, as compared to when all interference from the reference signal hits one single resource element when no time offset is used.Type: GrantFiled: September 15, 2016Date of Patent: March 22, 2022Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: David Sandberg, Mats Åhlander, Ari Kangas
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Patent number: 11272403Abstract: The present disclosure relates to methods and nodes configured for control link definition in a networked control system, wherein the networked control system comprises a controlling node, a controlled process node and a Machine Type Communication, MTC, wireless communication link between the controlling node and the controlled process node. The method comprises to obtain process characteristics for a process performed in the controlled process node and NCS requirements for an automatic control process to be performed in the NCS. The controlling node also determines link capability requirements for the MTC wireless communication link based on the process characteristics and the NCS requirements. One or more quality of service, QoS, parameters of the MTC wireless communication link are customized based on the determined link capability requirements.Type: GrantFiled: March 30, 2016Date of Patent: March 8, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn Wigren, Johan Bergman, Ari Kangas
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Publication number: 20220038149Abstract: A method for wireless backhaul inter-node communication between a first backhaul node and a second backhaul node is provided. The method includes computing a beamforming weight matrix W; and the first backhaul node using the beamforming weight matrix W to transmit and/or receive data to and/or from the second backhaul node. The beamforming matrix W is computed as the inverse of a weighted channel estimate matrix (Formula I), such that W=(Formula II), where ? is a channel estimate matrix and ? is a weighting factor matrix such that (Formula III) where ? has dimension Nrx by Ntx, where Nrx is the number of receive antennas and Ntx is the number of transmit antennas, where Ntx,=Nrx, and ? is a scalar between 0 and 1, and where ? denotes a Hadamard matrix product.Type: ApplicationFiled: September 27, 2018Publication date: February 3, 2022Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn WIGREN, Ari KANGAS
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Patent number: 11050467Abstract: Ways to mitigate problems caused by too narrow transmission zero (nulls) without significantly increasing computational complexity. For example, the problem can be mitigated by modifying MU-MIMO transmission schemes so that the nulls are widened. This way, the UEs that are to be protected from transmission interference stay within the nulls, despite the angular disturbances.Type: GrantFiled: March 21, 2018Date of Patent: June 29, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ari Kangas, Henrik Egnell, Torbjörn Wigren
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Patent number: 11044001Abstract: A method is provided. The method includes computing a beamforming weight matrix W; and using the beamforming weight matrix W to transmit and/or receive data. The beamforming matrix W is computed from a weighted channel estimate matrix Formulae (A): and a channel estimation error matrix Formulae (B): the weighted channel estimate matrix Formulae (C): satisfying a condition, and where ? is a channel estimate matrix and ? is a weighting factor matrix and ? denotes a matrix operation. The weighting factor matrix ? is such that zeroes of the rows or columns of the weighted channel estimate matrix Formulae (C): are moved as compared to zeroes of the rows or columns of the channel estimate matrix ?.Type: GrantFiled: December 19, 2017Date of Patent: June 22, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Torbjörn Wigren, Ari Kangas
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Patent number: 10931520Abstract: A network node (200) a wireless device (202) and methods therein, for configuring a wireless link (204) to be used for controlling a process at a wireless device (202) involving communication of control signals and feedback signals over the wireless link (204). The network node (200) sends a request message (2:2) to the wireless device (202) comprising a request for performance requirements of the wireless link (204) needed for the communication of control signals and feedback signals. The wireless device (202) determines (2:3) the performance requirements based on at least one of: 1) characteristics of the process, and 2) requirements for how the process is controlled. The wireless device (202) then sends (2:4) a response message comprising the performance requirements to the network node (200) which configures (2:5) the wireless link (204) so that the performance requirements of the wireless link are fulfilled.Type: GrantFiled: November 11, 2015Date of Patent: February 23, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torbjörn Wigren, Johan Bergman, Ari Kangas
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Patent number: 10931351Abstract: Disclosed is a method and corresponding devices and computer programs for determining antenna weights for transmissions with punctured signals. The method comprises extracting, from a signal reception model for signals transmitted by at least two communication units, at least one of the communication units transmitting with punctured signals, a signal orthogonality loss quantity introduced by the punctured signals. The method also comprises calculating, based on the extracted signal orthogonality loss quantity, a covariance matrix quantifying the signal orthogonality loss between signals transmitted by the at least two communication units. The method also comprises determining, based on the covariance matrix, antenna weights for data symbols in the signals.Type: GrantFiled: July 26, 2017Date of Patent: February 23, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ari Kangas, Björn Nordström, Torbjörn Wigren
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Publication number: 20200412419Abstract: Ways to mitigate problems caused by too narrow transmission zero (nulls) without significantly increasing computational complexity. For example, the problem can be mitigated by modifying MU-MIMO transmission schemes so that the nulls are widened. This way, the UEs that are to be protected from transmission interference stay within the nulls, despite the angular disturbances.Type: ApplicationFiled: March 21, 2018Publication date: December 31, 2020Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ari KANGAS, Henrik EGNELL, Torbjörn WIGREN
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Publication number: 20200336191Abstract: A method is provided. The method includes computing a beamforming weight matrix W; and using the beamforming weight matrix W to transmit and/or receive data. The beamforming matrix W is computed from a weighted channel estimate matrix Formulae (A): and a channel estimation error matrix Formulae (B): the weighted channel estimate matrix Formulae (C): satisfying a condition, and where ? is a channel estimate matrix and ? is a weighting factor matrix and ? denotes a matrix operation. The weighting factor matrix ? is such that zeroes of the rows or columns of the weighted channel estimate matrix Formulae (C): are moved as compared to zeroes of the rows or columns of the channel estimate matrix ?.Type: ApplicationFiled: December 19, 2017Publication date: October 22, 2020Inventors: Torbjörn Wigren, Ari Kangas
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Publication number: 20200305029Abstract: The present disclosure relates to methods and nodes configured for control link definition in a networked control system, wherein the networked control system comprises a controlling node, a controlled process node and a Machine Type Communication, MTC, wireless communication link between the controlling node and the controlled process node. The method comprises to obtain process characteristics for a process performed in the controlled process node and NCS requirements for an automatic control process to be performed in the NCS. The controlling node also determines link capability requirements for the MTC wireless communication link based on the process characteristics and the NCS requirements. One or more quality of service, QoS, parameters of the MTC wireless communication link are customized based on the determined link capability requirements.Type: ApplicationFiled: March 30, 2016Publication date: September 24, 2020Inventors: Torbjörn WIGREN, Johan BERGMAN, Ari KANGAS
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Publication number: 20200119791Abstract: Disclosed is a method and corresponding devices and computer programs for determining antenna weights for transmissions with punctured signals. The method comprises extracting, from a signal reception model for signals transmitted by at least two communication units, at least one of the communication units transmitting with punctured signals, a signal orthogonality loss quantity introduced by the punctured signals. The method also comprises calculating, based on the extracted signal orthogonality loss quantity, a covariance matrix quantifying the signal orthogonality loss between signals transmitted by the at least two communication units. The method also comprises determining, based on the covariance matrix, antenna weights for data symbols in the signals.Type: ApplicationFiled: July 26, 2017Publication date: April 16, 2020Inventors: Ari Kangas, Björn Nordström, Torbjörn Wigren
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Publication number: 20180270007Abstract: A method and a network node (700) serving a first cell in a wireless network, for reducing interference in a second cell caused by transmission of reference signals in the first cell. The network node (700) transmits (7:2) in the first cell a scheduling block where a number of said reference signals are located in predefined resource element positions in the scheduling block, using a time offset relative transmission of a scheduling block in the second cell. Thereby, the impact of interference from a reference signal from one network node will be distributed over several resource elements in the other network node so that the impact in each resource element is reduced, as compared to when all interference from the reference signal hits one single resource element when no time offset is used.Type: ApplicationFiled: September 15, 2016Publication date: September 20, 2018Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: David SANDBERG, Mats ÅHLANDER, Ari KANGAS
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Publication number: 20180262390Abstract: A network node (200) a wireless device (202) and methods therein, for configuring a wireless link (204) to be used for controlling a process at a wireless device (202) involving communication of control signals and feedback signals over the wireless link (204). The network node (200) sends a request message (2:2) to the wireless device (202) comprising a request for performance requirements of the wireless link (204) needed for the communication of control signals and feedback signals. The wireless device (202) determines (2:3) the performance requirements based on at least one of: 1) characteristics of the process, and 2) requirements for how the process is controlled. The wireless device (202) then sends (2:4) a response message comprising the performance requirements to the network node (200) which configures (2:5) the wireless link (204) so that the performance requirements of the wireless link are fulfilled.Type: ApplicationFiled: November 11, 2015Publication date: September 13, 2018Inventors: Torbjörn Wigren, Johan Bergman, Ari Kangas
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Patent number: 9967063Abstract: In a transmitter or transceiver, codewords from HARQ processes can be mapped or assigned to various layers for transmission and/or retransmission of information on a radio channel. Exemplary embodiments provide for various mappings which facilitate, for example, HARQ processes. For example, a codeword can be mapped onto a plurality of layers which are equal in number to a channel rank of a radio channel to be used for the transmission.Type: GrantFiled: November 18, 2016Date of Patent: May 8, 2018Assignee: OPTIS WIRELESS TECHNOLOGY, LLCInventors: George Jöngren, Ari Kangas
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Patent number: 9756584Abstract: A method and system for setting an initial dedicated physical control channel (DPCCH) power of a secondary carrier after a transmission gap are disclosed. According to one aspect, a method includes determining a filtered DPCCH power of first carrier. The method further includes determining a power offset. The method also includes calculating the initial DPCCH power of the secondary carrier by adding the determined filtered DPCCH power of the first carrier to the determined power offset.Type: GrantFiled: November 23, 2016Date of Patent: September 5, 2017Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Cagatay Konuskan, Billy Hogan, Ari Kangas, Göran Kronquist, Waikwok Kwong, Gerardo Agni Medina Acosta, Hongxia Zhao
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Patent number: 9723585Abstract: A scaling apparatus and method scales uncertainty criteria (horizontal and vertical accuracy requirements) originally received from an end user before the uncertainty criteria is sent on to a wireless terminal (30) as requirements on the accuracy of location positioning performed by/for the wireless terminal. In an example embodiment the amount/degree of scaling is selected according to a configured best estimate of the confidence and uncertainty relation, and such best estimate can be based on the majority of the terminals of the network. For a WCDMA radio access network (RAN) case the scaling can be performed in a radio network controller (RNC). For a Long Term Evolution (LTE) radio access network (RAN) case the scaling can be performed in the evolved Serving Mobile Location Center (eSMLC) node. In another case the scaling can alternatively be performed in the wireless terminal itself.Type: GrantFiled: June 13, 2014Date of Patent: August 1, 2017Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Ari Kangas, Torbjorn Wigren
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Publication number: 20170078982Abstract: A method and system for setting an initial dedicated physical control channel (DPCCH) power of a secondary carrier after a transmission gap are disclosed. According to one aspect, a method includes determining a filtered DPCCH power of first carrier. The method further includes determining a power offset. The method also includes calculating the initial DPCCH power of the secondary carrier by adding the determined filtered DPCCH power of the first carrier to the determined power offset.Type: ApplicationFiled: November 23, 2016Publication date: March 16, 2017Inventors: Cagatay KONUSKAN, Billy HOGAN, Ari KANGAS, Göran KRONQUIST, Waikwok KWONG, Gerardo Agni MEDINA ACOSTA, Hongxia ZHAO