Patents by Inventor Christer Östberg
Christer Östberg 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: 20180249351Abstract: Network nodes (102, 104), control node (100) and methods therein, for enabling establishment of a neighbour relation between a first network node (102) and a second network node (104) in a wireless network. The control node (100) sends (1:1) or distributes, to network nodes in the network including the first network node (702), a set of reference signals reserved for neighbour relation establishment. The second network node (104) transmits (1:3) one of the reserved reference signals which is then detected by a wireless device (D1) being served by the first network node (102) which then receives (1:4), from the wireless device (D1), a measurement report indicating the detected reference signal that is recognized by the first network node (102) as belonging to the set of reserved reference signals.Type: ApplicationFiled: October 6, 2016Publication date: August 30, 2018Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Mehdi AMIRIJOO, Håkan AXELSSON, Rasmus AXÉN, Fredrik GUNNARSSON, Patrik KARLSSON, Walter MÜLLER, Christer ÖSTBERG, Pradeepa RAMACHANDRA, Henrik RONKAINEN, Thomas WALLDEEN
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Publication number: 20180241441Abstract: A receiver (10) featuring a distributed antenna combining system performs two stages of antenna combining. An antenna array (30) receives (102) L streams, or information flows, from UEs (20), and outputs antenna signals on N antenna ports. N parallel radio receivers (40) frequency convert (104) the N received signals to baseband. A first antenna combining circuit (50) applies (106) a relatively low-complexity form of antenna combining (e.g., MRC) to the N radio signals to generate K streams of virtual information. A second antenna combining circuit (60) applies (108) a relative high-complexity form of antenna combining (e.g., IRC) to the K virtual streams to generate L information streams. In one embodiment, antenna elements may have different polarization directions, and the first antenna combining circuit (50) generates two, differently-polarized virtual information streams for each UE (20) stream.Type: ApplicationFiled: August 20, 2015Publication date: August 23, 2018Inventors: Torsten Carlsson, Anders Carlsson, Christer Östberg, Andres Reial
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Publication number: 20180213598Abstract: A method is performed by a radio equipment (RE) of an access node. The RE has an interface to a radio equipment controller (REC) of the access node. The method comprises configuring the resources for at least one of uplink reception and downlink transmission selectively using beamforming weights determined either based on internal information obtained locally in the RE, or based on external information received from the REC over the interface.Type: ApplicationFiled: October 25, 2016Publication date: July 26, 2018Inventors: Jacob ÖSTERLING, Jonas KARLSSON, Oskar MAURITZ, Christer ÖSTBERG, Jan ROXBERGH
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Patent number: 9100888Abstract: A Multi Subscriber Identity Module (SIM) modem capable of receiving paging messages related to at least two subscriber identities comprises a paging configuration block configured to determine whether a collision between paging occasions related to the respective subscriber identities will be systematic or not, and to launch, when the collision has been determined to be systematic, a reselection of a new cell for at least one of the at least two subscriber identities.Type: GrantFiled: November 25, 2011Date of Patent: August 4, 2015Assignee: ST-Ericsson SAInventors: Sylviane Roullier, Christer Östberg, Samuel Lamazure
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Patent number: 9094809Abstract: A technique for managing activity states of at least two subscriptions in a terminal device is described. A method implementation of this technique performed in the terminal device comprises the steps of monitoring whether a first subscription is to transit or has transit from a first active state to a second active state while at least one second subscription is in a detached state, wherein the second active state is associated with a lower terminal activity than the first active state, if the result of the monitoring step is affirmative, waiting for a predetermined period of time, upon elapse of the predetermined period of time, if the first subscription is still in the second active state, triggering a transition of the first subscription from the second active state to an inactive state and initiating for the at least one second subscription a transition from a detached state to an inactive state.Type: GrantFiled: December 12, 2011Date of Patent: July 28, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Bengt Lindoff, Bo Lincoln, Johan Nilsson, Christer Östberg
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Patent number: 9002346Abstract: A technique for managing measurements for at least two subscriptions in a mobile terminal is described. A method implementation of this technique performed in the mobile terminal comprises the steps of determining a common carrier set being an intersection between the first carrier set associated with a first subscription and the second carrier set associated with at least one second subscription, performing a first measurement on the first carrier set, and the second measurement on the second carrier set excluding the common carrier set, and mapping results associated with the first measurement of the first subscription relating to the common carrier set to the at least one second subscription.Type: GrantFiled: September 20, 2011Date of Patent: April 7, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Bengt Lindoff, Bo Lincoln, Johan Nilsson, Christer Östberg
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Publication number: 20140106750Abstract: Multi SIM modem (10) capable of receiving paging messages related to at least two subscriber identities, characterized in that it comprises a paging configuration block (30) configured to determine whether a collision between paging occasions related to the respective subscriber identities will be systematic or not, and to launch, when collision has been determined to be systematic, a reselection of a new cell for at least one of the at least two subscriber identities.Type: ApplicationFiled: November 25, 2011Publication date: April 17, 2014Applicant: ST-ERICSSON SAInventors: Sylviane Roullier, Christer Östberg, Samuel Lamazure
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Publication number: 20140004842Abstract: A technique for managing activity states of at least two subscriptions in a terminal device is described. A method implementation of this technique performed in the terminal device comprises the steps of monitoring whether a first subscription is to transit or has transit from a first active state to a second active state while at least one second subscription is in a detached state, wherein the second active state is associated with a lower terminal activity than the first active state, if the result of the monitoring step is affirmative, waiting for a predetermined period of time, upon elapse of the predetermined period of time, if the first subscription is still in the second active state, triggering a transition of the first subscription from the second active state to an inactive state and initiating for the at least one second subscription a transition from a detached state to an inactive state.Type: ApplicationFiled: December 12, 2011Publication date: January 2, 2014Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Bengt Lindoff, Bo Lincoln, Johan Nilsson, Christer Östberg
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Publication number: 20130231104Abstract: A technique for managing measurements for at least two subscriptions in a mobile terminal is described. A method implementation of this technique performed in the mobile terminal comprises the steps of determining a common carrier set being an intersection between the first carrier set associated with a first subscription and the second carrier set associated with at least one second subscription, performing a first measurement on the first carrier set, and the second measurement on the second carrier set excluding the common carrier set, and mapping results associated with the first measurement of the first subscription relating to the common carrier set to the at least one second subscription.Type: ApplicationFiled: September 20, 2011Publication date: September 5, 2013Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Bengt Lindoff, Bo Lincoln, Johan Nilsson, Christer Östberg
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Patent number: 7917113Abstract: A method for synchronizing measurements in a mobile communication apparatus having a first active radio access means (100) adapted to communicate according to a first radio access technology (RAT) and at least a second passive radio access means (200) adapted to communicate according to a second RAT. A time reference common to the first and the second access means (100) is generated. At least one time schedule is obtained, said schedule indicating at least one time gap wherein the second access means (200) is allowed to be active. The activation time of the schedule is based on the common time reference. An arrangement adapted to generate the common time reference and the time schedule is also disclosed.Type: GrantFiled: April 5, 2004Date of Patent: March 29, 2011Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Torgny Palenius, Johan Hokfelt, Christer Östberg, Jan Wichert, Mikael Nilsson, Richard Ewald, Patrik Olofsson, H{dot over (a)}kan Palm
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Patent number: 7626956Abstract: A method and apparatus for measurement event synchronization of a portable radio communication apparatus providing multiple radio access technologies, wherein an idle gap is identified between transceiver activities of a first radio access technology device, and an execute signal is sent to a second radio access technology device for initiating inter radio access technology measurements of the second radio access technology device, to be performed during the gap.Type: GrantFiled: April 3, 2004Date of Patent: December 1, 2009Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Torgny Palenius, Johan Hokfelt, Christer Östberg, Jan Wichert, Mikael Nilsson, Richard Ewald, Patrik Olofsson, Hákan Palm
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Patent number: 7440489Abstract: A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.Type: GrantFiled: August 7, 2001Date of Patent: October 21, 2008Assignee: Ericsson Inc.Inventors: Erik Dahlman, Yi-Pin Eric Wang, Paul W. Dent, Gregory E. Bottomley, Ali Khayrallah, Christer Östberg
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Patent number: 7382821Abstract: A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver.Type: GrantFiled: January 24, 2007Date of Patent: June 3, 2008Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Roozbeh Atarius, Torsten J. Carlsson, Håkan B. Eriksson, Kjell B. Gustafsson, Torgny Palenius, Christer Östberg
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Patent number: 7379724Abstract: A mobile communications terminal for use in a cellular communications system such as a CDMA system. The terminal includes an electronic circuit for receiving a wire-less communications signal carrying signal channels having processing means for extracting the signal channels. The electronic circuit is adapted to classify a type of interference affecting the communications quality by evaluating signals selected in the electronic circuit that are selected as signals having information for classifying a type of interference in one of at least two predetermined classes of interference.Type: GrantFiled: December 18, 2001Date of Patent: May 27, 2008Assignee: Telefonkatiebolaget LM Ericsson (PUBL)Inventors: Johan Nilsson, Christer Östberg, Håkan Eriksson
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Patent number: 7269421Abstract: The uplink transmission timing from a mobile communications device is defined with reference to the downlink reception timing of signals from a particular reference cell. When that reference cell is removed from the active set, there is defined a virtual reference cell, the timing of which is defined with reference to one or more of the cells remaining in the active set, such that the timing of this new virtual reference cell corresponds to the timing of the previous reference cell. The timing of the uplink transmission from the user equipment are then defined with reference to the new virtual reference cell, in the conventional way. This has the advantage that, following a soft handover, it is not necessary to adjust the timing of uplink transmissions from the user equipment.Type: GrantFiled: March 24, 2003Date of Patent: September 11, 2007Assignee: Telefonktiebolaget LM Ericsson (publ)Inventors: Torgny Palenius, Christer Östberg
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Patent number: 7197063Abstract: Method and system are disclosed for providing advanced RAKE delay control in wireless communications systems. The RAKE delay control method and system of the invention is capable of tracking presently known paths over time and merging the tracking results with new path searcher results. The invention is particularly suitable for devices where the resources (e.g., computational load, power) available for detecting the multipath components are limited. The result is a resource efficient architecture for positioning the RAKE fingers to best extract the signal power available in the channel and to utilize the inherent diversity due to the multipath nature of the signal.Type: GrantFiled: February 7, 2003Date of Patent: March 27, 2007Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Andres Reial, Anders Ericsson, Christer Östberg, Robert Svensson, Johan Nilsson, Håkan Eriksson
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Patent number: 7184462Abstract: A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver.Type: GrantFiled: December 4, 1998Date of Patent: February 27, 2007Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Roozbeh Atarius, Torsten J. Carlsson, H{dot over (a)}kan B. Eriksson, Kjell B. Gustafsson, Torgny Palenius, Christer Östberg
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Patent number: 7065130Abstract: A method and system enables matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the location(s) of received signal path-rays. In a first stage, an oversampled digital signal is decimated, and the decimated signal is applied to a matched filter to eventually produce an approximate location. In a second stage, the oversampled signal is shifted based on the determined approximate location and then correlated to a generated code, and a more-exact location is selected from the outputs of the correlations. Alternatively, a shifted version of the generated code is correlated to the oversampled signal, and the more-exact location is selected from the outputs of those correlations.Type: GrantFiled: October 2, 2000Date of Patent: June 20, 2006Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Roozbeh Atarius, Håkan Eriksson, Torgny Palenius, Christer Östberg, Torsten Carlsson, Kjell Gustafsson
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Patent number: 7013140Abstract: A mobile terminal can identify cellular control channels that can be received by the mobile terminal from a cellular system, by identifying a cellular control channel that can be received from a history list of cellular control channels that were previously received by the mobile terminal. A next cellular control channel that can be received by the mobile terminal then is scanned for, by skipping at least one cellular control channel that is adjacent the cellular control channel that was identified, based on channel allocation rules in the cellular system.Type: GrantFiled: December 10, 2002Date of Patent: March 14, 2006Assignee: Telefonaktiebolaget L.M. EricssonInventors: Christer Östberg, Hans Stattin, Bengt Lindoff
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Patent number: 6850505Abstract: A channel estimate generator generates a plurality of channel estimates and a Doppler frequency estimator uses two or more channel estimates to generate a Doppler frequency estimate. The Doppler frequency estimator generates the Doppler frequency estimate by calculating the normalized distance between two consecutive channel estimates. A receiver uses the Doppler frequency estimate to either (1) adjust the receiver, (2) estimate the velocity of the receiver, (3) determine whether it is necessary to search for new paths, or (4) predict or track new paths. The receiver can use a moving average of Doppler frequency estimates or a weighted combination of Doppler frequency estimates from different paths of a received signal to calculate the Doppler frequency estimate.Type: GrantFiled: September 1, 1999Date of Patent: February 1, 2005Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventor: Christer Östberg