Patents by Inventor Panagiota LIOLIOU
Panagiota LIOLIOU 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: 10237028Abstract: Network nodes and methods therein for inter cell interference coordination. A method in a base station BS1 comprises receiving, from a neighboring base station BS2, an indicator A, related to estimated spatial properties of a radio channel over which the neighboring base station has received a radio signal from the base station BS1. The method further comprises receiving, from a UE served by the base station, an indicator B related to estimated spatial properties of a radio channel over which the UE has received a radio signal from the base station BS1. The method further comprises determining a correlation based on indicator A and indicator B; and adapting a transmission to the UE, based on properties of the correlation. By performing the method, the base station BS1 enables control of interference subjected towards the neighboring base station BS2 caused by downlink transmission to the UE.Type: GrantFiled: September 3, 2013Date of Patent: March 19, 2019Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Bo Göransson, Lars Lindbom, Panagiota Lioliou, Dirk Gerstenberger
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Patent number: 10165524Abstract: An apparatus and a method for uplink and/or downlink power control in a radio communication network are provided. The method comprises determining (120) a relationship between a load of a serving wireless access point and a load of at least one neighboring wireless access point; and determining (130) an uplink or downlink transmission power based on the determined load relationship.Type: GrantFiled: December 16, 2013Date of Patent: December 25, 2018Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Chrysostomos Koutsimanis, Panagiota Lioliou
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Patent number: 10141998Abstract: There is provided a method for utilizing antenna beam information. The method is performed by a network node. The method comprises acquiring antenna beam information indicative of a direction of a wireless device (WD) specific beam of the network node. The method comprises classifying the acquired antenna beam information into a cell specific beam category based on an angular difference between the direction and a direction of main lobe of a cell specific beam of the network node. The method comprises performing at least one of a load balancing action of the wireless device and a radiation beam pattern change related to the cell specific beam category.Type: GrantFiled: February 2, 2015Date of Patent: November 27, 2018Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Pradeepa Ramachandra, Harald Kallin, Panagiota Lioliou, Kristina Zetterberg
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Publication number: 20180332475Abstract: A method is provided which may be performed in a network node for traffic dependent cell shaping. The method includes: establishing at least one parameter indicative for a traffic distribution in a cell; selecting, based on the at least one parameter, a traffic situation type among at least a first and a second traffic situation types, wherein each traffic situation type has a respective process running a cell shaping algorithm, and applying, in the cell, the process corresponding to the selected traffic situation type. A corresponding network node, computer program and computer program products are also provided.Type: ApplicationFiled: November 24, 2015Publication date: November 15, 2018Inventors: Andreas NILSSON, Niklas JALDÉN, Panagiota LIOLIOU, Sven PETERSSON
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Publication number: 20180013476Abstract: There is provided a method for utilizing antenna beam information. The method is performed by a network node. The method comprises acquiring antenna beam information indicative of a direction of a wireless device (WD) specific beam of the network node. The method comprises classifying the acquired antenna beam information into a cell specific beam category based on an angular difference between the direction and a direction of main lobe of a cell specific beam of the network node. The method comprises performing at least one of a load balancing action of the wireless device and a radiation beam pattern change related to the cell specific beam category.Type: ApplicationFiled: February 2, 2015Publication date: January 11, 2018Inventors: Pradeepa Ramachandra, Harald Kallin, Panagiota Lioliou, Kristina Zetterberg
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Patent number: 9769761Abstract: An apparatus and a method performed by the apparatus for uplink power control of a wireless device in a radio communication network is provided. The method comprises obtaining (110) information pertaining to at least two of (a) radio resource utilisation of a serving wireless access point and at least one neighbouring wireless access point, (b) downlink geometry, and (c) uplink performance of the wireless device; and selecting (130) an uplink power control algorithm based on the obtained information.Type: GrantFiled: March 13, 2014Date of Patent: September 19, 2017Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Chrysostomos Koutsimanis, Panagiota Lioliou
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Publication number: 20170078974Abstract: An apparatus and a method performed by the apparatus for uplink power control of a wireless device in a radio communication network is provided. The method comprises obtaining (110) information pertaining to at least two of (a) radio resource utilisation of a serving wireless access point and at least one neighbouring wireless access point, (b) downlink geometry, and (c) uplink performance of the wireless device; and selecting (130) an uplink power control algorithm based on the obtained information.Type: ApplicationFiled: March 13, 2014Publication date: March 16, 2017Inventors: Chrysostomos Koutsimanis, Panagiota Lioliou
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Publication number: 20170013475Abstract: There is provided mechanisms for improving performance in a wireless communications network. A method is performed by a network node. The method comprises acquiring an identification of a set of cells for which adjustment is needed. The method comprises identifying a reason for the adjustment and improvement possibilities of the set of cells using at least one indicator. The reason and the improvement possibilities define a combination of which parameters and network nodes that could be adjusted. The method comprises determining an improvement action for the set of cells by jointly optimizing the combination of parameters and network nodes based on the reason and the improvement possibilities.Type: ApplicationFiled: July 8, 2015Publication date: January 12, 2017Inventors: Panagiota Lioliou, Harald Kallin, Birgitta Olin, Pradeepa Ramachandra, Kristina Zetterberg
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Patent number: 9531605Abstract: There is provided a method for determining a radiation beam pattern. The method is performed by a network node. The method comprises transmitting probe signals, the probe signals being orthogonal to cell-specific reference signals (CRS) transmitted by the network node. The method comprises receiving responses to the probe signals from wireless devices, wherein each response comprises a measurement report based on reception of the transmitted probe signals at each wireless device. The method comprises determining a radiation beam pattern based on the received measurement reports.Type: GrantFiled: February 2, 2015Date of Patent: December 27, 2016Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Pradeepa Ramachandra, Fredrik Athley, Harald Kallin, Panagiota Lioliou, Andreas Nilsson, Kristina Zetterberg
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Publication number: 20160374030Abstract: An apparatus and a method for uplink and/or downlink power control in a radio communication network are provided. The method comprises determining (120) a relationship between a load of a serving wireless access point and a load of at least one neighbouring wireless access point; and determining (130) an uplink or downlink transmission power based on the determined load relationship.Type: ApplicationFiled: December 16, 2013Publication date: December 22, 2016Inventors: Chrysostomos Koutsimanis, Panagiota Lioliou
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Publication number: 20160226729Abstract: There is provided a method for determining a radiation beam pattern. The method is performed by a network node. The method comprises transmitting probe signals, the probe signals being orthogonal to cell-specific reference signals (CRS) transmitted by the network node. The method comprises receiving responses to the probe signals from wireless devices, wherein each response comprises a measurement report based on reception of the transmitted probe signals at each wireless device. The method comprises determining a radiation beam pattern based on the received measurement reports.Type: ApplicationFiled: February 2, 2015Publication date: August 4, 2016Inventors: Pradeepa Ramachandra, Fredrik Athley, Harald Kallin, Panagiota Lioliou, Andreas Nilsson, Kristina Zetterberg
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Publication number: 20160211954Abstract: Network nodes and methods therein for inter cell interference coordination. A method in a base station BS1 comprises receiving, from a neighboring base station BS2, an indicator A, related to estimated spatial properties of a radio channel over which the neighboring base station has received a radio signal from the base station BS1. The method further comprises receiving, from a UE served by the base station, an indicator B related to estimated spatial properties of a radio channel over which the UE has received a radio signal from the base station BS1. The method further comprises determining a correlation based on indicator A and indicator B; and adapting a transmission to the UE, based on properties of the correlation. By performing the method, the base station BS1 enables control of interference subjected towards the neighboring base station BS2 caused by downlink transmission to the UE.Type: ApplicationFiled: September 3, 2013Publication date: July 21, 2016Applicant: Telefonaktiebolaget LM Ericsson (PUBL)Inventors: Bo GÖRANSSON, Lars LINDBOM, Panagiota LIOLIOU, Dirk GERSTENBERGER
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Patent number: 8570933Abstract: A method, and an apparatus, for self-interference suppression in a relay for wireless communication, wherein the relay is arranged for receiving a signal r(n) transmitted from a transmitter, and for transmitting a self-interference suppressed transmit signal xr(n) to a receiver. The self-interference suppressed transmit signal xr(n) is achieved by determining a receive suppression filter matrix Wr, determining a relay amplification matrix G, and determining a transmit suppression filter matrix Wt, and then applying the suppression filters and the amplification matrix to the received signal r(n).Type: GrantFiled: November 3, 2011Date of Patent: October 29, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Panagiota Lioliou, Mats Viberg, Mikael Coldrey
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Publication number: 20120106405Abstract: A method, and an apparatus, for self-interference suppression in a relay (300) for wireless communication, wherein the relay (300) is arranged for receiving a signal r(n) transmitted from a transmitter (301), and for transmitting a self-interference suppressed transmit signal xr(n) to a receiver (305). The self-interference suppressed transmit signal xr(n) is achieved by determining (402) a receive suppression filter matrix Wr (302), determining a relay amplification matrix G (303), and determining (403) a transmit suppression filter matrix Wt (304), and then applying the suppression filters and the amplification matrix to the received signal r(n).Type: ApplicationFiled: November 3, 2011Publication date: May 3, 2012Applicant: Telefonaktiebolaget L M Ericsson (pub)Inventors: Panagiota LIOLIOU, Mats Viberg, Mikael Coldrey