Patents by Inventor Leo Hedlund
Leo Hedlund 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: 20230055661Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: ApplicationFiled: August 29, 2022Publication date: February 23, 2023Inventors: Anders JOHANSSON, Leo HEDLUND
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Patent number: 11432281Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: GrantFiled: June 1, 2017Date of Patent: August 30, 2022Assignee: Optis Wireless sTechnolgy, LLCInventors: Anders Johansson, Leo Hedlund
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Patent number: 11290929Abstract: A method relating to handover in a communication system is disclosed. The method comprises establishing that a communication device is involved in a handover process from a first cell to a second cell, and increasing at least one of diversity and transmission power of a scheduling assignment transmitted on physical downlink control channel resources, wherein the physical downlink control channel resources are multiplexed with data resources in one or more orthogonal frequency division multiplexing, OFDM, symbols and wherein the scheduling assignment is specific for the communication device. A corresponding communication system, computer programs and computer program products are also disclosed.Type: GrantFiled: May 22, 2015Date of Patent: March 29, 2022Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Leo Hedlund, Anders Johansson, Mikael Jonsson
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Patent number: 10341902Abstract: The present disclosure relates to a method (30) relating to handover in a communication system (1). The method (30) comprises establishing (31) that a communication device (3) is involved in a handover process from a first cell (C1) to a second cell (C2); and increasing (33) transmission power of a scheduling assignment specific for the communication device (3). The disclosure also relates to a system, computer program and computer program products.Type: GrantFiled: January 15, 2015Date of Patent: July 2, 2019Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Walter Müller, Leo Hedlund, Mikael Jonsson
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Patent number: 10313080Abstract: A method performed by a network node 110, for improving the performance of a handover of a user equipment (UE) 120, wherein the network node 110 serves a first cell 130 comprising one or more UEs 120. When the network node 110 has detected that a Signaling Radio Bearer (SRB) is determined to be scheduled for a UE 120 in handover from the first cell 130 to a second cell 131, the network node 110 increases the Control Channel Element (CCE) aggregation level in an OFDM-subframe to be sent to the UE 120 in a TTI related to the handover. By increasing the CCE aggregation level during a handover procedure, the effective coding rate of the PDCCH is increased, which leads to a more robust coding and reliability. Thereby the number of unsuccessful handovers and lost service is effectively reduced.Type: GrantFiled: October 21, 2014Date of Patent: June 4, 2019Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Christian Skärby, Leo Hedlund, Mikael Jonsson
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Publication number: 20180124657Abstract: A method relating to handover in a communication system is disclosed. The method comprises establishing that a communication device is involved in a handover process from a first cell to a second cell, and increasing at least one of diversity and transmission power of a scheduling assignment transmitted on physical downlink control channel resources, wherein the physical downlink control channel resources are multiplexed with data resources in one or more orthogonal frequency division multiplexing, OFDM, symbols and wherein the scheduling assignment is specific for the communication device. A corresponding communication system, computer programs and computer program products are also disclosed.Type: ApplicationFiled: May 22, 2015Publication date: May 3, 2018Inventors: Leo Hedlund, Anders Johansson, Mikael Jonsson
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Publication number: 20170367012Abstract: The present disclosure relates to a method (30) relating to handover in a communication system (1). The method (30) comprises establishing (31) that a communication device (3) is involved in a handover process from a first cell(C1) to a second cell(C2); and increasing (33) transmission power of a scheduling assignment specific for the communication device (3). The disclosure also relates to a system, computer program and computer program products.Type: ApplicationFiled: January 15, 2015Publication date: December 21, 2017Inventors: Walter Müller, Leo Hedlund, Mikael Jonsson
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Publication number: 20170303171Abstract: A method performed by a network node, for handling handover of a user equipment (UE), wherein the network node serves a first cell comprising one or more UEs. When the network node has detected that a Signaling Radio Bearer (SRB) is determined to be scheduled for a UE in handover from the first cell to a second cell, the network node increases the number of OFDM-symbols included in a control region of a downlink OFDM-subframe sent in the first cell in a Transmission Time Interval (TTI) related to the handover. By increasing the number of OFDM-symbols of the control region only during the handover, the physical downlink control channel (PDCCH) is spread in time into symbols not polluted by CRS symbols from neighboring cells. Thereby the number of unsuccessful handovers and lost service is effectively reduced.Type: ApplicationFiled: November 11, 2014Publication date: October 19, 2017Inventors: Mikael JONSSON, Miroslav BUDIC, Leo HEDLUND, Karl MANN, Walter MÜLLER
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Publication number: 20170280449Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: ApplicationFiled: June 1, 2017Publication date: September 28, 2017Inventors: Anders Johansson, Leo Hedlund
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Patent number: 9755794Abstract: A method in a base station for handling a scheduling of a narrowband transmission from a user equipment in a cell served by the base station is provided. The base station and the user equipment are comprised in a cellular network. A time resource available for the scheduling is divided into available subframes. A frequency resource available for scheduling in each respective subframe is divided into available resource blocks. The base station selects a subframe among the subframes available for scheduling. Narrowband transmissions are to be prioritized for scheduling to the selected subframe. The base station schedules the transmission to a subset of the available resource blocks in the selected subframe when an indication that the transmission from the user equipment is a narrowband transmission is obtained.Type: GrantFiled: May 10, 2011Date of Patent: September 5, 2017Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Leo Hedlund, David Sandberg
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Publication number: 20170250788Abstract: A method performed by a network node 110, for improving the performance of a handover of a user equipment (UE) 120, wherein the network node 110 serves a first cell 130 comprising one or more UEs 120. When the network node 110 has detected that a Signaling Radio Bearer (SRB) is determined to be scheduled for a UE 120 in handover from the first cell 130 to a second cell 131, the network node 110 increases the Control Channel Element (CCE) aggregation level in an OFDM-subframe to be sent to the UE 120 in a TTI related to the handover. By increasing the CCE aggregation level during a handover procedure, the effective coding rate of the PDCCH is increased, which leads to a more robust coding and reliability. Thereby the number of unsuccessful handovers and lost service is effectively reduced.Type: ApplicationFiled: October 21, 2014Publication date: August 31, 2017Inventors: Christian Skärby, Leo Hedlund, Mikael Jonsson
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Patent number: 9705650Abstract: It is presented a method for determining an initial configuration of generation of uplink reference signals for a wireless terminal, the method being performed in a network node. The method comprises: obtaining at least one parameter used in a random access procedure associated with the wireless terminal, wherein each one of the at least one parameter is associated with the wireless terminal; and determining an initial configuration for the wireless terminal for generation of uplink reference signals, based on the at least one parameter. A corresponding network node is also presented.Type: GrantFiled: September 27, 2012Date of Patent: July 11, 2017Assignee: TELEFONAKTIEBOLAGET L M ERICSSONInventors: Leo Hedlund, Magnus Finne
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Patent number: 9699782Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: GrantFiled: September 12, 2014Date of Patent: July 4, 2017Assignee: OPTIS WIRELESS TECHNOLOGY, LLCInventors: Anders Johansson, Leo Hedlund
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Publication number: 20150288496Abstract: It is presented a method for determining an initial configuration of generation of uplink reference signals for a wireless terminal, the method being performed in a network node. The method comprises: obtaining at least one parameter used in a random access procedure associated with the wireless terminal, wherein each one of the at least one parameter is associated with the wireless terminal; and determining an initial configuration for the wireless terminal for generation of uplink reference signals, based on the at least one parameter. A corresponding network node is also presented.Type: ApplicationFiled: September 27, 2012Publication date: October 8, 2015Inventors: Leo Hedlund, Magnus Finne
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Patent number: 9154283Abstract: Automatically adjust the size of a Physical Uplink Control Channel, PUCCH, of an uplink communication subframe. In a particular embodiment, the size of a semi-static region of the PUCCH is adjusted. The adjustment is based on a utilization factor of the PUCCH over a time period. The adjustment can also be based on the connection factor (connections between the wireless terminals and the cell) and/or based on the utilization factor of a PUSCH (Physical Uplink Shared Channel). The result is an efficient resource utilization on the PUCCH, and a properly dimensioned PUCCH region.Type: GrantFiled: January 21, 2009Date of Patent: October 6, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Anders Johansson, Carola Faronius, Leo Hedlund, Jessica Östergaard, Peter Moberg
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Publication number: 20140376507Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: ApplicationFiled: September 12, 2014Publication date: December 25, 2014Inventors: Anders JOHANSSON, Leo HEDLUND
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Patent number: 8837379Abstract: The downlink control channels in a control region of each downlink subframe in a telecommunication system are divided into at least one common subset of the downlink control channels and a plurality of group subsets of the downlink control channels, such that the common subset or each common subset will be decoded by every user equipment, and each group subset will be decoded only by a limited group of user equipments. Resource assignment messages for a user equipment can then be transmitted on a downlink control channel of the relevant group subset, to avoid the need for messages to be decoded by a large number of UEs that will not act on them, while broadcast messages can be transmitted on a downlink control channel of the relevant common subset, to avoid the need for messages to be transmitted many times.Type: GrantFiled: December 18, 2008Date of Patent: September 16, 2014Assignee: Optis Wireless Technology, LLCInventors: Anders Johansson, Leo Hedlund
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Patent number: 8792434Abstract: A selector (40) and selection method performed at a base station (28) is configured to determine which control channel element(s) (CCE(s)) to use for a physical downlink control channel (PDCCH) comprising a subframe according to criteria that improves performance of a telecommunications system (20).Type: GrantFiled: October 8, 2008Date of Patent: July 29, 2014Assignee: Telefonaktiebolaget LM EricssonInventors: Leo Hedlund, Anders Johansson
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Publication number: 20140119333Abstract: A method in a base station for handling a scheduling of a narrowband transmission from a user equipment in a cell served by the base station is provided. The base station and the user equipment are comprised in a cellular network. A time resource available for the scheduling is divided into available subframes. A frequency resource available for scheduling in each respective subframe is divided into available resource blocks. The base station selects a subframe among the subframes available for scheduling. Narrowband transmissions are to be prioritized for scheduling to the selected subframe. The base station schedules the transmission to a subset of the available resource blocks in the selected subframe when an indication that the transmission from the user equipment is a narrowband transmission is obtained.Type: ApplicationFiled: May 10, 2011Publication date: May 1, 2014Applicant: Telefonaktiebolaget L M Ericsson (PUBL)Inventors: Leo Hedlund, David Sandberg
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Patent number: 8666393Abstract: A basic idea is to introduce an additional paging schedule for user equipment in connected mode that differs from the paging schedule used for user equipment in idle mode. Consequently, the inventive mechanism relies on distributing (S1) a notification of an upcoming change of system information in paging messages according to a first paging schedule for user equipment in idle mode, and distributing (S2) a notification of an upcoming change of system information in paging messages according to a second paging schedule for user equipment in connected mode. The second paging schedule for user equipment in connected mode is different from the first paging schedule for user equipment in idle mode. In this way, a satisfactory load distribution is achieved, at the same time as UEs in both connected and idle mode are able to receive important system information notifications.Type: GrantFiled: April 27, 2009Date of Patent: March 4, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Carola Faronius, Leo Hedlund, Walter Müller