Patents by Inventor Olof Liberg
Olof Liberg 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: 20250056241Abstract: A method, system and apparatus for supporting coexistence in the presence of non-terrestrial networks are disclosed. According to one aspect, a method in a network node of a first radio network includes obtaining information of at least one measurement of a signal transmitted from a non-terrestrial network, NTN, node of a second radio network. The method also includes evaluating, based at least in part on the obtained information of the at least one measurement, whether criteria for coexistence of the first radio network with a second radio network are met.Type: ApplicationFiled: December 14, 2022Publication date: February 13, 2025Inventors: Olof LIBERG, Xingqin LIN, Jonas SEDIN, Emre YAVUZ
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Publication number: 20250024374Abstract: A first communication node (12) in a wireless communication network (10) monitors for a cell-specific wake-up signal (20). The first communication node (12) may monitor for the cell-specific wake-up signal (20) with a wake-up receiver (12W). The first communication node (12) in particular may monitor for a cell-specific wake-up signal (20) that is any of multiple cell-specific wake-up signals (20) in a set. In some embodiments, the set is re-used for different sets of cells. Alternatively or additionally, the set may include cell-specific wake-up signals (20) that are based on multiple respective binary sequences, based on different codewords of a binary error correcting code, based on different orthogonal sequences in a set, composed of different sets of Zadoff-Chu sequences with different roots, composed of the same set of Zadoff-Chu sequences with different cyclic shifts, or a function of different cyclic shifts of a root wake-up signal formed by multiple Zadoff-Chu sequences with different roots.Type: ApplicationFiled: November 23, 2022Publication date: January 16, 2025Inventors: Andreas Höglund, Talha Khan, Olof Liberg, Leif Wilhelmsson, Mohammad Mozaffari, Miguel Lopez
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Patent number: 12192837Abstract: Methods performed by base stations and wireless devices for reducing RSRP and/or RSRQ measurements are disclosed. A method performed by a base station comprises indicating to a wireless device whether or not to perform cell selection and/or reselection measurements based on certain criteria. A method performed by a wireless device comprises determining whether or not to perform cell selection and/or reselection measurements based on certain criteria. Also disclosed are base stations and wireless devices configured to perform the methods.Type: GrantFiled: November 27, 2019Date of Patent: January 7, 2025Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Jonas Sedin, Sebastian Euler, Xingqin Lin, Helka-Liina Määttänen, Olof Liberg, Henrik Rydén
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Publication number: 20250008452Abstract: A first communication node (12) monitors for a wake-up signal (20) during a wake-up signal occasion (20-O), and monitors for a synchronization signal (16) in a synchronization signal occasion (16-O). In one embodiment, the synchronization signal occasion (16-O) at least partially overlaps in time with the wake-up signal occasion (20-O). In another embodiments, the synchronization signal occasion (16-O) occurs in time before or after the wake-up signal occasion (20-O). In this latter case, the synchronization signal occasion (16-O) and the wake-up signal occasion (20-O) may be consecutive occasions in time or may have a gap in time between them. In case there is a gap in time between the occasions, the gap may be a function of a cell identifier, a carrier frequency, a numerology or subcarrier spacing, a periodicity of the wake-up signal occasion (20-O), and/or a discontinuous reception cycle length.Type: ApplicationFiled: November 23, 2022Publication date: January 2, 2025Inventors: Andreas Höglund, Olof Liberg, Talha Khan
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Patent number: 12176992Abstract: Embodiments include methods for operating a network node in a non-terrestrial network (NTN) that utilizes one or more polarization modes for serving one or more cells. Such methods include transmitting, to one or more user equipment (UEs), an indication of at least one polarization mode configured for use in a first cell of the first NTN. The at least one polarization mode can be indicated in various ways, both explicitly and implicitly. Such methods also include transmitting and/or receiving one or more signals or channels in the first cell according to one or more configured polarization modes including the at least one indicated polarization mode. Other embodiments include complementary methods for operating UEs, as well as network nodes and UEs configured to perform such methods.Type: GrantFiled: September 23, 2020Date of Patent: December 24, 2024Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Olof Liberg, Jonas Sedin, Xingqin Lin, Sebastian Euler
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Publication number: 20240348328Abstract: Systems and methods are disclosed herein for frequency adjustment in a wireless network, particularly a Non-Terrestrial Network (NTN). Embodiments of a method performed by a User Equipment (UE) are disclosed. In one embodiment, a method performed by a UE for compensating for a Doppler shift in a wireless network comprises obtaining, from a network node, a characterization of Doppler variations in a particular cell. The method further comprises tuning a local frequency reference, fRef, of the UE to a received downlink frequency for the particular cell and adjusting the local frequency reference, fRef, over time according to the pre-calculated characterization of Doppler variations in the particular cell. In this manner, the communication between the UE and the network node in the presence of large and varying Doppler shifts is enabled. Embodiments related to compensating for timing drift are also disclosed.Type: ApplicationFiled: March 12, 2024Publication date: October 17, 2024Inventors: Talha Khan, Olof Liberg, Stefan Eriksson Löwenmark, Xingqin Lin
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Patent number: 12120623Abstract: Embodiments of methods for providing timing advance change detection are disclosed. In some embodiments, a method performed by a wireless device for determining a validity of a timing advance configuration of the wireless device for an idle mode transmission includes obtaining, while the wireless device is operating in a connected mode, a timing advance value for the wireless device. The method further includes transitioning from the connected mode to an idle mode, and performing a measurement on one or more serving cells of the wireless device while the wireless device is in the idle mode. The method also includes determining whether the timing advance is valid for an idle mode transmission based on the measurement. In some embodiments, the measurement may be a signal strength measurement, such as a Reference Signal Received Power measurement and/or a signal quality measurement such as, a Reference Signal Received Quality measurement.Type: GrantFiled: July 30, 2019Date of Patent: October 15, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Olof Liberg, Andreas Höglund, Emre Yavuz
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Publication number: 20240340801Abstract: A wireless communication device (12) is configured for use in a wireless communication network (10). The wireless communication device (10) switches from a first state (S1), in which wireless communication equipment (16) of the wireless communication device (12) keeps track of time, to a second state (S2) in which the wireless communication equipment (16) does not keep track of time. Before or as part of switching from the first state (S1) to the second state (S2). the wireless communication device (12) obtains a time reference (22). While in the second state (S2), the wireless communication device (12) stores the time reference (22) in memory (24). After or as part of switching from the second state (S2) to the first state (S1), the wireless communication device (12) resumes track of time using the time reference (22).Type: ApplicationFiled: July 15, 2022Publication date: October 10, 2024Inventors: Olof Liberg, Tuomas Tirronen, Andreas Höglund
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Patent number: 12114362Abstract: A method is performed by a wireless device for performing a random access. In response to a received paging transmission, and when certain conditions are met, the wireless device randomly selects a random access resource from a plurality of available random access resources. The available random access resources may be spread in time, or in frequency, or in time and frequency. The wireless device then transmits a random access signal on the selected random access resource.Type: GrantFiled: February 6, 2020Date of Patent: October 8, 2024Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Olof Liberg, Andreas Höglund
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Patent number: 12107778Abstract: Disclosed is a method for scheduling transmissions of multiple carriers from a single transmitting network node (10; 100) for multiple Narrow Band Internet of Things (NB-IoT) cells, (50). The multiple carriers comprising a respective cell specific anchor carrier having NB-IoT sub-frames allocated for the transmission of mandatory information related to the functionality of the specific cell. The method comprises scheduling (S1) at least two cell specific anchor carriers using time interleaved transmissions that enables NB-IoT sub-frames belonging to different cell specific anchor carriers, and being allocated for the transmission of the mandatory information, to be transmitted at non-overlapping times.Type: GrantFiled: May 3, 2019Date of Patent: October 1, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Olof Liberg, Yi-Pin Eric Wang
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Patent number: 12096290Abstract: According to some embodiments, a method performed by a wireless device for handover in a non-terrestrial network (NTN) from a source cell to a target cell comprises receiving a conditional handover configuration for one or more potential target cells. The conditional handover configuration comprises a condition for handover comprising a timing advance threshold value for each of the one or more potential target cells. The method further comprises determining that a timing advance between the wireless device and one of the one or more potential target cells is less than or equal to the timing advance threshold and based on the determination, performing a handover to the target cell.Type: GrantFiled: July 10, 2020Date of Patent: September 17, 2024Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Jonas Sedin, Olof Liberg, Xingqin Lin, Helka-Liina Määttänen
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Publication number: 20240298164Abstract: A terminal device (110) in a wireless communication network connects (210) to a Visited Public Land Mobile Network. VPLMN (140) and, while connected to the VPLMN (140), searches (220) for a Home Public Land Mobile Network, HPLMN (130) each time any of a plurality of timers expires. The searching comprises searching (225) across a plurality of frequency bands supported by the terminal device (110) in response to a first timer expiring and searching (227) across a subset of the plurality of frequency bands supported by the terminal device (110) in response to a second timer expiring. The terminal device may be configured by a base station to perform the searching.Type: ApplicationFiled: June 22, 2022Publication date: September 5, 2024Inventors: Andreas Höglund, Olof Liberg
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Patent number: 12082148Abstract: A wireless communication device includes a receiver arranged to receive radio signals from a radio access network node of the cellular communication system, and a signal detector arranged to detect a first signal and a second signal among the signals received from the access network node. The first signal includes a network synchronisation signal having information about synchronisation and an identification of a cell associated with the access network node. The second signal includes a notification. A controller causes the signal detector to detect a notification of a first type when the received identification of the cell is equal to a previous reception of an identification of a cell at a last interaction between the wireless communication device and the cellular communication system or detect a notification of a second type when the received identification of the cell differs from the previous reception of the identification of the cell at the last interaction.Type: GrantFiled: February 14, 2020Date of Patent: September 3, 2024Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Magnus Åström, Andreas Höglund, Olof Liberg
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Patent number: 12082011Abstract: Embodiments include methods for radio link monitoring (RLM) by a user equipment (UE) in a combined terrestrial and satellite wireless communication network. Such methods include, during a discontinuity in a connection between a UE and a terrestrial network node (TNN), performing RLM of the connection based on a second configuration. Such methods also include, before and/or after the discontinuity, performing RLM of the connection based on a first configuration. The connection includes a first link between the UE and a satellite and a second link between the satellite and the TNN. The discontinuity includes a link switch in at least one of the first link and the second link. The RLM before, during, and after the discontinuity can include various first, second, and third operations, respectively. Embodiments also include complementary methods performed by a TNN, as well as UEs and TNNs configured to perform operations corresponding to such methods.Type: GrantFiled: November 1, 2019Date of Patent: September 3, 2024Assignee: Telefonaktiebolaget LM Ericsson (PubInventors: Helka-Liina Määttänen, Talha Khan, Xingqin Lin, Henrik Rydén, Sebastian Euler, Olof Liberg
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Patent number: 12082117Abstract: A network node is configured to monitor battery usage on behalf of the low power device and to predict the SOC and remaining life-time for the batteries in the low power devices. The network nodes are fully powered and have the computational capacity to use more complex and accurate models that are not feasible for implementation in resource-limited devices. The network node can calculate the SOC and remaining life-time for a low power device and may also change the transmission and reception patterns for the device to extend the life-time of the battery.Type: GrantFiled: May 21, 2019Date of Patent: September 3, 2024Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Talha Khan, Per Gunningberg, Olof Liberg, Yi-Pin Eric Wang
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Patent number: 12081472Abstract: A wireless device (12) is configured for use in a wireless communication system (10). The wireless device (12) is configured to receive signaling (16) from a network node (14). The signaling (16) in some embodiments indicates that a reference signal (20) is configured to be transmitted before and/or during every L occurrence of a physical downlink control channel search space (18), wherein L?2. In other embodiments, the signaling (16) indicates that a reference signal (20) is configured to be transmitted before and/or during every K discontinuous reception, DRX, cycle (22), wherein K?2.Type: GrantFiled: August 8, 2019Date of Patent: September 3, 2024Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Yi-Pin Eric Wang, Kazuyoshi Uesaka, Santhan Thangarasa, Ritesh Shreevastav, Yutao Sui, Olof Liberg
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Publication number: 20240284333Abstract: According to some embodiments, a method performed by a wireless device comprises adapting monitoring of a downlink control channel based on a gap in network coverage overlapping a paging occasion configured for the wireless device. Adapting monitoring of the downlink control channel comprises monitoring the downlink control channel during a replacement paging occasion.Type: ApplicationFiled: August 5, 2022Publication date: August 22, 2024Inventors: Emre Yavuz, Johan Rune, Xingqin Lin, Olof Liberg, Zhipeng Lin, Talha Khan, Robert Karlsson
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Patent number: 12066557Abstract: Methods performed by wireless devices and base stations for performing GNSS-assisted measurement reporting are disclosed. A method performed by a wireless device includes: determining that a measurement reporting triggering condition has been satisfied based on at least a location of the wireless device, the location of the wireless device being determined using GNSS location measurements; determining one or more measurement quantities relating to satellite(s) for each of the plurality of surrounding cells; and reporting at least a subset of the measurement quantities. A method performed by a base station includes: signalling to a wireless device a measurement report triggering condition, the measurement reporting triggering condition being based on at least a location of the wireless device, the location of the wireless device being determined using GNSS location measurements; and receiving a measurement report from the wireless device when the measurement reporting triggering condition is satisfied.Type: GrantFiled: January 29, 2020Date of Patent: August 20, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Olof Liberg, Helka-Liina Määttanen
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Patent number: 12069490Abstract: Wireless devices, base stations, and other network devices and method are described that improve link level performance in a non-terrestrial network (NTN). In an embodiment, a method includes one or more of: configuring an NB-IoT (narrowband-Internet of Things) NPSS (Narrowband Primary Synchronization Signal) transmissions in multiple spot beams overlapping in time and frequency, configuring LTE PSS (Primary Synchronization Signal) transmissions in multiple beams overlapping in time and frequency, configuring NR (New Radio) PSS transmissions (e.g., which support the same shift of a respective M-sequence that defines the NR PSS) in multiple beams overlapping in time and frequency, configuring NR PSS transmissions (e.g., which support the same shift of a respective M-sequence that defines the NR PSS) in multiple beams configured to share the same SS/PBCH block index overlapping in time and frequency.Type: GrantFiled: May 1, 2020Date of Patent: August 20, 2024Assignee: Telefonaktiebolagget LM Ericsson (Publ)Inventors: Olof Liberg, Xingqin Lin, Yi-Pin Eric Wang
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Publication number: 20240276376Abstract: A method, system and apparatus are disclosed. A network node is provided. The network node is configured to communicate with a wireless device where the network node is configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to receive a first indication indicating that the wireless device is an energy harvesting wireless device and to perform at least one action associated with energy harvesting at the wireless device based at least on the first indication.Type: ApplicationFiled: June 14, 2022Publication date: August 15, 2024Inventors: Sandeep Narayanan KADAN VEEDU, Saeedeh MOLOUDI, Kittipong KITTICHOKECHAI, Mohammad MOZAFFARI, Tuomas TIRRONEN, Olof LIBERG, Mattias BERGSTRÖM, Andreas HÖGLUND, Stefan WÄNSTEDT, Sina MALEKI, Yi-Ju CHEN, Yi-Pin Eric WANG, Johan BERGMAN