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).

  • Publication number: 20120052860
    Abstract: 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: Application
    Filed: April 27, 2009
    Publication date: March 1, 2012
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Carola Faronius, Leo Hedlund, Walter Müller
  • Publication number: 20110294497
    Abstract: The invention discloses a method (400) for use in a controlling node (110) of a cell (105) in cellular communications system (100), and comprises the steps of: • Overhearing and recording (405), at a first predefined point (410) in the controlling node (110), traffic transmitted by the controlling node to one or more user terminals (115, 120, 125) in said cell (105), • Repeating or playing back (420) recorded traffic at a second predefined point (425) in the controlling node (110), so that said recorded traffic is mixed (445) with traffic, if any, which is actually transmitted to user terminals (115, 120, 125) in the cell (105).
    Type: Application
    Filed: February 11, 2009
    Publication date: December 1, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leo Hedlund, Torbjörn Keisu, Walter Müller
  • Publication number: 20110280206
    Abstract: 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: Application
    Filed: January 21, 2009
    Publication date: November 17, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Anders Johansson, Carola Faronius, Leo Hedlund, Jessica Östergaard, Peter Moberg
  • Patent number: 8031670
    Abstract: Disclosed herein are systems and methods for choosing the size of the control region of a downlink subframe. For example, an apparatus for selecting the size of the control region based on a set of one or more physical downlink control channels (PDCCHs) is disclosed. The apparatus, in some embodiments, includes: a module configured to determine, for each of at least two or more control region sizes included in a set of two or more control region sizes, a subset of PDCCHs from said set of PDCCHs that can be assigned to a control region having a size equal to the control region size; and control region size selector for selecting a control region size for the subframe, wherein the control region size selector is configured to make the selection based, at least in part, on information pertaining to the subset of PDCCHs that can be assigned to a control region having a size equal to the selected control region size.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: October 4, 2011
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Anders Johansson, Leo Hedlund
  • Publication number: 20110194524
    Abstract: 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: Application
    Filed: October 8, 2008
    Publication date: August 11, 2011
    Inventors: Leo Hedlund, Anders Johansson
  • Publication number: 20100120424
    Abstract: Disclosed herein are systems and methods for choosing the size of the control region of a downlink subframe. For example, an apparatus for selecting the size of the control region based on a set of one or more physical downlink control channels (PDCCHs) is disclosed. The apparatus, in some embodiments, includes: a module configured to determine, for each of at least two or more control region sizes included in a set of two or more control region sizes, a subset of PDCCHs from said set of PDCCHs that can be assigned to a control region having a size equal to the control region size; and control region size selector for selecting a control region size for the subframe, wherein the control region size selector is configured to make the selection based, at least in part, on information pertaining to the subset of PDCCHs that can be assigned to a control region having a size equal to the selected control region size.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 13, 2010
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Anders JOHANSSON, Leo HEDLUND
  • Publication number: 20090161618
    Abstract: 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: Application
    Filed: December 18, 2008
    Publication date: June 25, 2009
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Anders JOHANSSON, Leo Hedlund