Patents by Inventor Leif Wilhelmsson

Leif Wilhelmsson 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).

  • Patent number: 10420095
    Abstract: A method of controlling data transmission of a transceiver is disclosed. The method comprises determining that data is pending for transmission by the transceiver and receiving a signal. A current required transmission effort for transmission of the data is estimated based on the received signal and it is determined if data transmission is to be initiated based on the estimated current required transmission effort, required transmission effort statistics and a time criterion associated with the data. Transmission of the data is initiated if it is determined that so should be done and otherwise the decision of transmitting the data is postponed. Corresponding computer program product, processor, arrangement and wireless communication device are also disclosed.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: September 17, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Bengt Lindoff, Leif Wilhelmsson, Anders Wallen
  • Patent number: 10419093
    Abstract: There is provided a method and corresponding device for enabling channel state feedback for multi-user transmission in a wireless communication system. The method comprises performing (S1), for each of a number of users, a classification of the user into one of at least two groups based on a measure of the speed of the temporal channel variation for the user. The method also comprises selecting (S2), for each of the users, a channel state feedback mechanism based on the classification.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: September 17, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Wilhelmsson, Andreas Bergström, Yu Wang
  • Patent number: 10405345
    Abstract: There is provided configuration of a secondary cellular network node for a secondary serving cell associated with a primary serving cell in a carrier aggregation enabled communications network. The secondary cellular network node receives an indication from a primary cellular network node associated with the primary serving cell to start scanning an unlicensed frequency band for deployment of the secondary serving cell. The secondary cellular network node scans at least one unlicensed frequency band to determine whether or not interference from transmitting interferers is present in the at least one unlicensed frequency band. The secondary cellular network node determines, based on the scanning, at least one frequency interval of the at least one unlicensed frequency band substantially free from the transmitting interferers. The secondary cellular network node transmits first configuration information of the at least one frequency interval to the primary cellular network node.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: September 3, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bengt Lindoff, Leif Wilhelmsson
  • Publication number: 20190268849
    Abstract: In one aspect, a transmitting device forms an OFDM signal comprising a plurality of OFDM symbols and carrying user data targeted to a main transceiver of one or more receiving devices. The transmitting device modulates the OFDM signal with a wake-up signature (WUS) targeted to awake-up receiver (WUR) of a receiving device other than the one or more receiving devices. The modulating is performed so as to superimpose a modulation of signal power on the OFDM signal, the resulting variations in signal power conveying the wake-up signature. The modulated OFDM signal is transmitted, where a receiving device receives the OFDM at its WUR. The receiving device detect a WUS modulated in the OFDM signal that is targeted to a wake-up receiver of a receiving device other than the one or more receiving devices. The receiving device wakes up its main transceiver in response to the detecting.
    Type: Application
    Filed: May 5, 2017
    Publication date: August 29, 2019
    Inventors: Miguel Lopez, Dennis Sundman, Leif Wilhelmsson
  • Publication number: 20190268201
    Abstract: A link adaptation method is disclosed of a network node adapted to operate in concurrent association with one or more orthogonal frequency division multiple access (OFDMA) wireless communication devices using OFDMA signaling, and a non-OFDMA wireless communication device using non-OFDMA signaling. The non-OFDMA signaling has a bandwidth that is smaller than a maximum bandwidth of the OFDMA signaling. The method comprises excluding one or more sub-carriers from the OFDMA signaling to create a frequency gap and determining a center frequency of the non-OFDMA signaling such that the center frequency is within the frequency gap. The method also comprises selecting a modulation and coding scheme to be used for the OFDMA signaling based on a first signal-to-interference value. In the first signal-to-interference value, the non-OFDMA signaling acts as interference to the OFDMA signaling. Corresponding computer program product, arrangement and network node are also disclosed.
    Type: Application
    Filed: November 9, 2016
    Publication date: August 29, 2019
    Inventor: Leif Wilhelmsson
  • Publication number: 20190260497
    Abstract: Method performed by a first communication device (101) or transmitting data to a second communication device (102). The first communication device (101) transmits (603) the data in a set of time-frequency resources (800) scheduled for transmission by the first communication device (101). The set of time-frequency resources (800) has a fixed duration and comprises: a) a first part (801) comprising the data and b) a second part (802). The first part (801) has a shorter duration than the fixed duration. The transmitting (603) of the data in the first part (801) is performed with a first modulation and coding scheme (MCS). The second part (802) has a remaining duration of the fixed duration. The second part (802) comprises at least one of: a padding, and additional data. The transmitting (603) further comprises transmitting said at least one of: the padding and the additional data, with a second MCS.
    Type: Application
    Filed: September 23, 2016
    Publication date: August 22, 2019
    Inventors: Yu Wang, Guido Roland Hiertz, Filip Mestanov, Leif Wilhelmsson
  • Patent number: 10375756
    Abstract: A communication device is arranged for three main communication states: a detached state, an idle state, and an active state. The communication device connects to the cellular communication network such that a transition from the detached state to any of idle state or active state is made, performs scheduled operations in the active state or idle state, determines, when a transition from the active state to the idle state occurs, a time instant for a next operation in the active state, disconnects from the cellular communication network such that a transition to the detached state is made, and, when the time for next operation in the active state is approaching, connects to the cellular communication network again. A transceiver and a computer program are also disclosed.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 6, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bengt Lindoff, Anders Wallén, Leif Wilhelmsson
  • Patent number: 10368369
    Abstract: An access point (AP) uses a communication channel resource to communicate with first wireless communication devices using orthogonal frequency division multiple access (OFDMA) and with second wireless communication devices using carrier sense multiple access with collision avoidance (CSMA/CA). The AP alternates between OFDMA communication and CSMA/CA communication, and—during OFDMA communication—alternating between uplink and downlink communication. Each time period between an end of uplink communication and a start of downlink communication has a duration that is smaller than a time period threshold, and each time period between an end of downlink communication and a start of uplink communication has a duration that is smaller than the time period threshold. The time period threshold is smaller than or equal to a minimum time period required for any of the second wireless communication devices to acquire access to communication with the AP using CSMA/CA.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: July 30, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Leif Wilhelmsson, Thomas Nilsson
  • Publication number: 20190223105
    Abstract: A mobile device that comprises a main receiver and a wake-up receiver is operated by periodically attempting to receive a first signal that is configured for receipt by the wake-up receiver. For each attempt, a detection result is generated that indicates whether the first signal was received with a signal quality that satisfies a predetermined minimum quality criterion. One or more of the detection results are used as a basis for deciding whether or not the wake-up receiver is within range of an access point. An operation of the mobile device is adjusted in response to a decision that the wake-up receiver is not within range of the access point.
    Type: Application
    Filed: March 27, 2019
    Publication date: July 18, 2019
    Inventors: Leif Wilhelmsson, Parth Amin
  • Patent number: 10342041
    Abstract: There is provided access to a communications channel in a wireless communications network. Stations (STAs) associated with an access point (AP) are grouped in at least two groups of STAs, each group being associated with a minimum transmission power level needed by the AP to communicate with the STAs in that group. A first time interval is allocated for a first group of STAs associated with highest minimum transmission power to access the communications channel concurrently with a third time interval being allocated by another AP for a third group of STAs associated with lowest minimum transmission power level needed by said another AP to communicate with the third group of STAs to access the communications channel.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: July 2, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Leif Wilhelmsson, Guido Roland Hiertz, Dzevdan Kapetanovic, Christofer Lindheimer, Filip Mestanov, Thomas Nilsson, Eric Nordstrom, Hakan Persson, Johan Soder, Meng Wang
  • Patent number: 10326570
    Abstract: There is provided mechanisms for frequency selective scheduling of wireless devices in a communication network. A method is performed by a wireless network node. The method comprises transmitting a first packet to at least one wireless device over the entire available bandwidth of the communication network, wherein the first packet comprises information identifying which wireless devices are addressed by the packet, and which downlink sub-carriers are used for data transmission to the addressed wireless devices. The method comprises receiving a second packet on uplink sub-carriers allocated to at least the addressed wireless devices and therefrom determining channel quality indications for the uplink sub-carriers. The uplink sub-carriers are allocated to enable the channel quality indications to be determined over the entire bandwidth for at least each one of the addressed wireless devices.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: June 18, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Leif Wilhelmsson, Thomas Nilsson, Meng Wang
  • Patent number: 10326545
    Abstract: According to a disclosed example, an intention of a first wireless communication device to use a first power level and a first time-frequency resource for up-link transmission to a first cellular communication network is detected. At a second wireless communication device, a signal is received from the first device indicative of up-link transmission. The second device determines whether or not an interference (caused by the up-link transmission of the first device and affecting a down-link reception of the second device from a second cellular communication network at a second power level in a second time-frequency resource) has a third power level associated with the first power level that exceeds a power level threshold associated with the second power level.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: June 18, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Bengt Lindoff, Leif Wilhelmsson, Imadur Rahman
  • Patent number: 10320524
    Abstract: A Transmitting Node (TN) 102 and a method therein for providing enhanced channel coding of a packet transmitted in a communications network 100. The TN applies, to payload data, an outer channel encoder resulting in a plurality of outer code bits. Further the TN applies an inner channel encoder to the plurality of outer code bits. Furthermore, the TN divides resulting code bits of the inner channel encoder into a first group and one or more second groups. Yet further, the TN generates a first set of OFDM symbols carrying at least a part of the first group, and second sets of OFDM symbols carrying at least a part of the one or more second groups. The TN transmits a packet comprising the first set of OFDM symbols followed by the second sets of OFDM symbols, whereby an enhanced channel coding of the transmitted packet is provided.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: June 11, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Miguel Lopez, Dennis Sundman, Leif Wilhelmsson
  • Patent number: 10320597
    Abstract: There is provided a method and corresponding arrangements for scheduling users with different Guard Interval, GI, length for multi-user transmission in a wireless communication system, where each of the users is associated with a GI length. The proposed technology involves grouping at least a subset of the users into at least two groups according to GI length for transmission in allocated transmission opportunity, TXOP, resources. In this way, by dynamically scheduling at least part of the users for group-wise transmission according to GI length, the spectral efficiency can be improved. The proposed technology allows for higher scheduling flexibility when different users have different GI length requirements.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: June 11, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Meng Wang, Leif Wilhelmsson
  • Patent number: 10306556
    Abstract: An access point device comprising a transceiver configured to receive and send messages on a communication channel, and a controller configured to cause the transceiver to transmit beacon messages regularly on the communication channel is disclosed. The beacon messages include a first indication that data, for one or more stations arranged to communicate with the access point device over the communication channel, is buffered in a buffer associated with the access point device when data is buffered in the buffer. The transceiver is arranged to transmit at least one utility message, transmitted over the communication channel between transmissions of the beacon messages, wherein the at least one utility message comprises a second indication for at least one of the one or more stations as to whether an upcoming beacon message comprises the first indication that data for the at least one of the one or more stations is buffered in the buffer.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 28, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Naveed Butt, Bryan Smith, Leif Wilhelmsson
  • Patent number: 10305711
    Abstract: A method for modulating and coding a data packet comprising digitally encoded information. The method comprises selecting a hierarchy of modulation and coding schemes to use for modulation and coding of the digitally encoded information. The method also comprises identifying, among the bits in the digitally encoded information and based on the selected hierarchy of modulation and coding schemes, two sets of data, a first set of data and a second set of data, the second set of data being a sub-set of the first set of data and comprising bits different from the most robust bits of the first set of data. The method further comprises performing modulation and coding of the first set of data using a modulation and coding scheme with high order modulation in order to create a first layer of the data packet.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: May 28, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Wilhelmsson, Miguel Lopez, Nafiseh Shariati, Dennis Sundman
  • Patent number: 10299254
    Abstract: The present disclosure proposes a general method for accessing a network when a wireless device, e.g., a user equipment, knows about a wireless network because it can e.g. measure on a cell and read its system information, but is unable to access it. The disclosure relates to transmitting uplink control messages relating to data received in a wireless device and in particular it relates a method, performed in a wireless device supporting a first radio access technology and a second radio access technology, of transmitting uplink control messages relating to data received in the wireless device. The method comprises receiving a configuration message defining in the first radio access technology, a Physical Fast Control Channel for transmission of uplink control messages relating to data received in the wireless device using the second radio access technology and transmitting uplink control messages relating to data received using the second radio access technology on the Physical Fast Control Channel.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: May 21, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Bengt Lindoff, Robert Baldemair, Yngve Selen, Anders Wallen, Leif Wilhelmsson
  • Publication number: 20190132844
    Abstract: Disclosed is a network node (110) and a method performed by a network node (110) of a wireless communication network (100) for wireless transmission of signals to wireless communication devices (120, 130). The method comprises selecting an adapted modulation and coding scheme, MCS, for a first signal to be transmitted to a first wireless communication device (120) at a first frequency bandwidth, the MCS being adapted to that a second signal is to be transmitted to a second wireless communication device (130) concurrently with the first signal, the second signal being transmitted at a second frequency bandwidth that is a subset of the first frequency bandwidth, the second frequency bandwidth being narrower than the first frequency bandwidth.
    Type: Application
    Filed: June 3, 2016
    Publication date: May 2, 2019
    Inventors: Miguel Lopez, Naveed Butt, Leif Wilhelmsson
  • Publication number: 20190124658
    Abstract: An UL carrier frequency or a downlink carrier frequency is adapted as a consequence of a determination that there is a difference in link budgets between uplink and downlink. Since a downlink provides a geographical coverage that is of a certain size, a lesser reliability of the uplink has a consequence that a mobile terminal may not be able to communicate when located far from a network node that transmits the downlink but still within the geographical coverage area of the downlink. Such drawbacks of present day wireless communication systems can be at least mitigated by embodiments of the present disclosure.
    Type: Application
    Filed: September 7, 2015
    Publication date: April 25, 2019
    Inventors: Leif WILHELMSSON, Dzevdan KAPETANOVIC, Bengt LINDOFF, Thomas NILSSON
  • Patent number: 10271282
    Abstract: A mobile device that comprises a main receiver and a wake-up receiver is operated by periodically attempting to receive a first signal that is configured for receipt by the wake-up receiver. For each attempt, a detection result is generated that indicates whether the first signal was received with a signal quality that satisfies a predetermined minimum quality criterion. One or more of the detection results are used as a basis for deciding whether or not the wake-up receiver is within range of an access point. An operation of the mobile device is adjusted in response to a decision that the wake-up receiver is not within range of the access point.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: April 23, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Leif Wilhelmsson, Parth Amin