Patents by Inventor Oskar Drugge
Oskar Drugge 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: 20170245302Abstract: Method performed by a first communication device (101) operating in a wireless communications network (100). The first communication device (101) determines (1101) one or more parameters for transmitting on an uplink control channel in an unlicensed band to a second communication device (102). The second communication device (102) operates in the wireless communications network (100). The one or more parameters comprise an indication of a duration of a channel sensing period. The first communication device (101) then transmits (1102) on the uplink control channel to the second communication device (102), by applying the determined one or more parameters. According to a method performed by the second communication device (102) operating in the wireless communications network (100), the second communication device (102) determines (1301) the one or more parameters.Type: ApplicationFiled: February 15, 2017Publication date: August 24, 2017Inventors: Amitav Mukherjee, Oskar Drugge, Henrik Sahlin, Henning Wiemann, Emma Wittenmark
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Publication number: 20170215206Abstract: According to certain embodiments, a method implemented in a wireless device is provided that includes determining that a scheduling request (SR) cannot be transmitted on an uplink during a scheduled SR opportunity. The SR is transmitted in a first transmission opportunity following a partial downlink (DL) subframe from a network node (115).Type: ApplicationFiled: March 15, 2017Publication date: July 27, 2017Inventors: Jung-Fu Cheng, Oskar Drugge, Havish Koorapaty, Amitav Mukherjee, Henning Wiemann
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Publication number: 20170163388Abstract: Methods of operation of a wireless device are provided. In particular, Media Access Control (MAC) protocol aspects are disclosed relating to Licensed Assisted Access (LAA) cells and, more generally, to cells of a cellular communications network operating in an unlicensed frequency spectrum. According to one aspect, a method of operation of a wireless device comprises transmitting an Uplink (UL) transmission on a cell for a corresponding UL Hybrid Automatic Repeat Request (HARQ) process, the cell operating in an unlicensed frequency spectrum, and setting a locally maintained status for the UL HARQ process to Acknowledgement (ACK) based on an assumption that the UL transmission was successful.Type: ApplicationFiled: November 30, 2016Publication date: June 8, 2017Inventors: Henning Wiemann, Mattias Tan Bergström, Jung-Fu Cheng, Oskar Drugge, Havish Koorapaty, Henrik Sahlin, Yu Yang
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Publication number: 20160242039Abstract: A method of operating a network node arranged for cellular communication is disclosed. The network node is capable to operate according to a Radio Access Technology, RAT. The method comprises checking whether a channel in an unlicensed band is clear. If found that the channel is clear, the method proceeds with transmitting a reservation signal on the channel, transmitting data on the channel, and releasing the channel. The transmitting of the reservation signal further includes embedding information related to the transmitting entity and embedding information about scheduled recipient or recipients. The reservation signal may also include embedded information about a duration or end of the intended transmission. Methods for network nodes and communication devices, computer programs, network nodes and communication device are also disclosed.Type: ApplicationFiled: February 17, 2015Publication date: August 18, 2016Inventors: Oskar Drugge, Michael Breschel, Sorour Falahati, Daniel Larsson
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Patent number: 9407341Abstract: A user equipment transmits using at least two uplink transmit antennas and receives a set of control signals in the downlink direction from a cellular network. The user equipment estimates a received signal quality for each control signal in said set of control signals and determines, based on said received signal quality, which control signals have been reliably received. The user equipment derives one or more parameters related to the uplink transmit diversity operation using a subset of control signals from the set of control signals, said subset only including control signals determined as reliably received; and transmits in the uplink direction applying the derived one or more parameters to control the uplink transmit diversity operation. The accuracy of the transmit diversity parameter values derived/set by the UE can be improved. This will enhance the performance of the uplink transmit diversity and will also reduce interference to the neighbor cells.Type: GrantFiled: April 6, 2015Date of Patent: August 2, 2016Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Muhammad Kazmi, Johan Bergman, Oskar Drugge
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Publication number: 20160094282Abstract: A user equipment transmits using at least two uplink transmit antennas and receives a set of control signals in the downlink direction from a cellular network. The user equipment estimates a received signal quality for each control signal in said set of control signals and determines, based on said received signal quality, which control signals have been reliably received. The user equipment derives one or more parameters related to the uplink transmit diversity operation using a subset of control signals from the set of control signals, said subset only including control signals determined as reliably received; and transmits in the uplink direction applying the derived one or more parameters to control the uplink transmit diversity operation. The accuracy of the transmit diversity parameter values derived/set by the UE can be improved. This will enhance the performance of the uplink transmit diversity and will also reduce interference to the neighbor cells.Type: ApplicationFiled: April 6, 2015Publication date: March 31, 2016Inventors: Muhammad Kazmi, Johan Bergman, Oskar Drugge
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Patent number: 9247491Abstract: A receiver 10 and method in the receiver for cell search to find an actual base station having a carrier frequency in a radio communications network 1. The receiver detects a first signal representative of a base station 12, 14, 16, 18 by performing slot synchronisation, frame synchronization, cell identification, measurement of a signal quality of the first signal and comparison of the measured signal quality with a first threshold value. When a first signal having a signal quality that is greater than the first threshold value has been detected, the receiver searches for at least one second signal representative of a base station for at least one frequency offset comprised in a set of offsets S3. Further, when one or more second signals are detected, the receiver selects the signal with the highest signal quality, and detects a broadcast radio channel representative of a base station for the selected signal.Type: GrantFiled: March 12, 2013Date of Patent: January 26, 2016Assignee: ST-ERICSSON SAInventors: Oskar Drugge, Koichi Kojima, Max Larsson, Torgny Palenius, Benny Stenlund
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Patent number: 9198079Abstract: In one aspect of the teachings herein, a receiver generates an improved estimate of other-cell covariance for the data region of its own-cell signal, by supplementing its pilot-based estimations of the other-cell covariance with supplemental estimations of other-cell covariance that are determined from control symbols transmitted in the control region its own-cell signal and in one or more selected other-cell signals. While the supplemental estimations are derived from the control region, the receiver advantageously fits them against the pilot-based estimations or against received-signal correlations for the data region, and uses the fitted estimations to obtain an improved estimate of other-cell covariance, for use in generating combining weights for equalization processing of the own-cell signal.Type: GrantFiled: December 2, 2013Date of Patent: November 24, 2015Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Elias Jonsson, Oskar Drugge
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Publication number: 20150208328Abstract: A receiver 10 and method in the receiver for cell search to find an actual base station having a carrier frequency in a radio communications network 1. The receiver detects a first signal representative of a base station 12, 14, 16, 18 by performing slot synchronisation, frame synchronization, cell identification, measurement of a signal quality of the first signal and comparison of the measured signal quality with a first threshold value. When a first signal having a signal quality that is greater than the first threshold value has been detected, the receiver searches for at least one second signal representative of a base station for at least one frequency offset comprised in a set of offsets S3. Further, when one or more second signals are detected, the receiver selects the signal with the highest signal quality, and detects a broadcast radio channel representative of a base station for the selected signal.Type: ApplicationFiled: March 12, 2013Publication date: July 23, 2015Inventors: Oskar Drugge, Koichi Kojima, Max Larsson, Torgny Palenius, Benny Stenlund
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Publication number: 20150156670Abstract: In one aspect of the teachings herein, a receiver generates an improved estimate of other-cell covariance for the data region of its own-cell signal, by supplementing its pilot-based estimations of the other-cell covariance with supplemental estimations of other-cell covariance that are determined from control symbols transmitted in the control region its own-cell signal and in one or more selected other-cell signals. While the supplemental estimations are derived from the control region, the receiver advantageously fits them against the pilot-based estimations or against received-signal correlations for the data region, and uses the fitted estimations to obtain an improved estimate of other-cell covariance, for use in generating combining weights for equalization processing of the own-cell signal.Type: ApplicationFiled: December 2, 2013Publication date: June 4, 2015Inventors: Elias Jonsson, Oskar Drugge
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Patent number: 9025477Abstract: Methods and devices are provided wherein a user equipment transmits using at least two uplink transmit antennas and receives a set of control signals in the downlink direction from a cellular network. The user equipment estimates a received signal quality for each control signal in said set of control signals and determines, based on said received signal quality, which control signals that have been reliably received. The user equipment derives one or more parameters related to the uplink transmit diversity operation using a subset of control signals from the set of control signals, said subset only including control signals determined as reliably received; and transmits in the uplink direction applying the derived one or more parameters to control the uplink transmit diversity operation. The accuracy of the transmit diversity parameter values derived/set by the UE can be improved. This will enhance the performance of the uplink transmit diversity and will also reduce interference to the neighbor cells.Type: GrantFiled: October 4, 2010Date of Patent: May 5, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Muhammad Kazmi, Johan Bergman, Oskar Drugge
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Patent number: 8861623Abstract: A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a dispersion determined for each carrier. The receiver initially allocates a minimum number of processing delays sufficient for light dispersion to each carrier. For the dispersive carriers, the receiver allocates one or more additional processing delays. In one embodiment, the additional processing delays are allocated to the dispersive carriers based on SIR.Type: GrantFiled: May 27, 2009Date of Patent: October 14, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Elias Jonsson, Oskar Drugge, Douglas A. Cairns
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Patent number: 8811362Abstract: A radio receiver receives multiple radio frequency (RF) carriers where each RF carrier corresponds to a logical entity or object used in multi-carrier communications called a cell. A receiving radio node receives signals on serving cells, including a serving cell on a primary carrier and a serving cell on a secondary carrier, and on neighboring cells, including a neighboring cell on the primary carrier and a neighboring cell on the secondary carrier. Initially, a power delay profile is calculated for each of the serving cells and the neighboring cells. An association is determined between at least one cell on the primary carrier and at least one cell on the secondary carrier based on the calculated power delay profiles. The association is then later used in performing interference cancellation in the radio node.Type: GrantFiled: July 2, 2010Date of Patent: August 19, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Oskar Drugge, Muhammad Kazmi
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Patent number: 8675879Abstract: A method of operating a User Equipment (UE) for generating a second scrambling code group where the UE is configured for receiving downlink transmission from a Universal Mobile Telecommunications System Terrestrial Radio Access Network (UTRAN) on a set of at least two downlink carriers including an anchor carrier and at least a first secondary carrier includes: determining a first scrambling code group associated with a first cell on the anchor carrier and deriving the second scrambling code group associated with a second cell on said first secondary carrier using a predefined rule defining the relation between the second scrambling code group and the first scrambling code group.Type: GrantFiled: November 3, 2010Date of Patent: March 18, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Oskar Drugge, Douglas A. Cairns, Muhammad Kazmi, Andres Reial
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Patent number: 8599772Abstract: A radio receiver uses a first receiver type for receiving data and/or control information on one or more secondary carrier channel(s) if one or more common channels(s) are transmitted on the corresponding secondary carrier. Otherwise, the radio receiver uses a second receiver type for receiving data and/or control information on one or more secondary carrier channel(s).Type: GrantFiled: June 4, 2010Date of Patent: December 3, 2013Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Oskar Drugge, Muhammad Kazmi
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Patent number: 8442132Abstract: A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a comparison between the signal-to-interference ratios (SIRs) determined for each carrier. The receiver initially allocates a minimum number of processing delays to each carrier. In one embodiment, any remaining additional processing delays are distributed evenly between the carriers when a comparison between the largest and smallest SIR is less than or equal to a threshold. In another embodiment, the remaining additional processing delays are distributed to favor the carrier(s) with the strongest SIR(s) when the comparison between the largest and smallest SIR exceeds the threshold.Type: GrantFiled: June 3, 2009Date of Patent: May 14, 2013Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Elias Jonsson, Oskar Drugge
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Publication number: 20120219155Abstract: Methods and devices are provided whereby scrambling codes can be set in an improved way. In accordance with one embodiment a method is provided in a User Equipment for generating a second scrambling code or a second scrambling code group. The UE is configured for multi carrier operation receiving downlink transmission from a Universal Mobile Telecommunications System Terrestrial Radio Access Network on a set of at least two downlink carriers including an anchor carrier and at least a first secondary carrier. The method comprises determining a first scrambling code or a first scrambling code group associated with a first cell on the anchor carrier; and deriving a second scrambling code or a second scrambling code group associated with a second cell on said first secondary carrier using a predefined rule defining the relation between the second scrambling code or second scrambling code group and the first scrambling code or scrambling code group.Type: ApplicationFiled: November 3, 2010Publication date: August 30, 2012Applicant: Telefonaktiebolaget L M Ericsson (publ)Inventors: Oskar Drugge, Douglas A. Cairns, Muhammad Kazmi, Andres Reial
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Patent number: 8238472Abstract: One or more carrier signals in a multiple-carrier UE transmitter are frequency-adjusted to account for an estimated error in the separation frequency between the transmitted carrier signals. The adjustment is applied when generating the UL signals for the respective carrier frequencies in digital baseband of the UE. In one embodiment, one or more of the modulators that apply the carrier separation frequency additionally apply a frequency correction. In another embodiment, first mixers apply the carrier separation frequency to each different carrier signal. One or more carrier signal paths include a second mixer applying a frequency correction to the carrier signal. The RF modulation frequency may also be adjusted to partially compensate for the estimated carrier separation frequency error.Type: GrantFiled: April 7, 2009Date of Patent: August 7, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Oskar Drugge, Anders Wallén
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Publication number: 20120195224Abstract: Methods and devices are provided wherein a user equipment transmits using at least two uplink transmit antennas and receives a set of control signals in the downlink direction from a cellular network. The user equipment estimates a received signal quality for each control signal in said set of control signals and determines, based on said received signal quality, which control signals that have been reliably received. The user equipment derives one or more parameters related to the uplink transmit diversity operation using a subset of control signals from the set of control signals, said subset only including control signals determined as reliably received; and transmits in the uplink direction applying the derived one or more parameters to control the uplink transmit diversity operation. The accuracy of the transmit diversity parameter values derived/set by the UE can be improved. This will enhance the performance of the uplink transmit diversity and will also reduce interference to the neighbor cells.Type: ApplicationFiled: October 4, 2010Publication date: August 2, 2012Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Muhammad Kazmi, Johan Bergman, Oskar Drugge
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Publication number: 20120106530Abstract: A radio receiver receives multiple radio frequency (RF) carriers where each RF carrier corresponds to a logical entity or object used in multi-carrier communications called a cell. A receiving radio node receives signals on serving cells, including a serving cell on a primary carrier and a serving cell on a secondary carrier, and on neighboring cells, including a neighboring cell on the primary carrier and a neighboring cell on the secondary carrier. Initially, a power delay profile is calculated for each of the serving cells and the neighboring cells. An association is determined between at least one cell on the primary carrier and at least one cell on the secondary carrier based on the calculated power delay profiles. The association is then later used in performing interference cancellation in the radio node.Type: ApplicationFiled: July 2, 2010Publication date: May 3, 2012Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Oskar Drugge, Muhammad Kazmi