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: 12034669
    Abstract: A transceiver device includes a controller arranged to identify a first set of control information within the data packet, and to re-map the data packet such that the first set of control information is mapped on bits known to be more robust. The transceiver device further includes a transmitter arranged to transmit the re-mapped data packet. The first set of control information holds information which enables for identification to combine soft bits from repeated transmissions at a receiver of the packet. The bits known to be more robust have more distinct value distribution in signal space of a used modulation and coding scheme than other bits. The transceiver device is arranged to transmit a data packet. A corresponding method, computer program, access point and station are also disclosed.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: July 9, 2024
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Miguel Lopez, Leif Wilhelmsson, Dennis Sundman
  • Publication number: 20240214914
    Abstract: A wireless station (11) associates to an access point (10) of a wireless communication system. The access point (10) operates on a first wireless channel. While the wireless station (11) is associated to the access point (10), the wireless station (11) receives periodically transmitted beacons on one or more second wireless channels, which are different from the first wireless channel, e.g., beacons from other access points (10). Based on the received beacons, the wireless station (11) performs measurements for sensing one or more objects in an environment of the wireless station (11).
    Type: Application
    Filed: April 26, 2021
    Publication date: June 27, 2024
    Inventors: Sebastian Max, Leif Wilhelmsson, Miguel Lopez
  • Publication number: 20240196331
    Abstract: A method for a radio access node configured for transmission to a user device over multiple links. The method includes, responsive to data being available for transmission to the user device, determining which of the multiple links are possible links for transmission of the data, selecting one or more links of the possible links, and transmitting a wake-up signal to the user device, wherein the wake-up signal is indicative of the selected one or more links. A method is also disclosed for a user device configured for reception from a radio access node over multiple links. The method includes receiving a wake-up signal from the radio access node, wherein the wake-up signal is indicative of one or more of the multiple links, and waking up one or more of the multiple receivers, corresponding to the indicated one or more links.
    Type: Application
    Filed: April 7, 2021
    Publication date: June 13, 2024
    Inventors: Miguel LOPEZ, Abhishek AMBEDE, Sebastian MAX, Leif WILHELMSSON, Jonas SEDIN, Rocco DI TARANTO
  • Patent number: 11996909
    Abstract: A method is performed by a network node of a communication network. The communication network comprises a plurality of coordinated radio access network nodes for transmitting multiple streams of data to a wireless device in a given time resource. The method comprises: causing transmission, to the wireless device, of an indication that the wireless device should perform multiple separate phase-tracking processes on the signals received from the plurality of coordinated radio access network nodes in the given time resource.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: May 28, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Miguel Lopez, Leif Wilhelmsson, Dennis Sundman
  • Publication number: 20240154739
    Abstract: A method and devices for allocating frequency domain resources for wireless sensing of a radio channel associated with a sensing device. The method includes determining a sensing frequency range for the sensing device based on a frequency selectivity of the radio channel, and allocating frequency domain resources for the sensing device at least in part based on the determined sensing frequency range. The frequency selectivity may be parameterized based on one or more of: a number of propagation paths of the radio channel, a time dispersiveness of the channel, an impulse response of the channel, a power delay profile of the channel, a delay spread of the channel, a root mean square delay spread of the channel, a frequency response of the channel, and a coherence bandwidth of the channel. The sensing frequency range may includes a sensing bandwidth and/or a sensing frequency spread.
    Type: Application
    Filed: February 19, 2021
    Publication date: May 9, 2024
    Inventors: Miguel LOPEZ, Leif WILHELMSSON
  • Patent number: 11979199
    Abstract: A method is disclosed for a wireless transceiver comprising a plurality of transceiver antenna elements and configured to operate in a communication network. The method comprises dynamically assigning (from the plurality of transceiver antenna elements) a first set of transceiver antenna elements allocated for channel sensing and a second set of transceiver antenna elements allocated for communication, performing channel sensing using the first set of transceiver antenna elements, and operating the wireless transceiver based on a result of the performed channel sensing.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: May 7, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Joao Vieira, Narendar Madhavan, Leif Wilhelmsson, Tai Do
  • Publication number: 20240147387
    Abstract: A wireless communication device is operated to transmit information on a random access channel of a network node. Operation involves determining a first transmit power level for a transmission of the information, and selecting a first transmission time for the transmission of the information, wherein the selected first transmission time is determined by a number drawn from a first contention window, and wherein the selected first transmission time corresponds to a first amount of time delay that must elapse before transmission of the information occurs. The information is transmitted at the selected first transmission time, at the first transmit power level. When the transmitted information was not successfully received by the network node, a size of a second contention window is determined based on a size of the first contention window and on the first transmit power level.
    Type: Application
    Filed: June 24, 2021
    Publication date: May 2, 2024
    Inventors: Leif Wilhelmsson, Jonas Sedin, Sebastian Max, Charlie Pettersson, Rocco Di Taranto
  • Patent number: 11968067
    Abstract: A method of signalling in a Wireless Local Area Network, WLAN, includes transmitting a signal having a physical layer data unit via a wireless channel of the WLAN using plural subcarriers spaced across plural symbols, the physical layer data unit having a data packet and a preamble, wherein the preamble has a synchronisation part having a channel estimation part. The channel estimation part has N training symbols, where N is an integer greater than 1, the N training symbols have synchronisation information for synchronising a second wireless device with the first wireless device, the synchronisation information having an offset value, and synchronisation information transmitted in second and subsequent training symbols is transmitted using offset subcarriers, the offset subcarriers being frequency offset with respect to reference subcarriers used to transmit synchronisation information in a first training symbol, the frequency offset being equal to the offset value.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: April 23, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Miguel Lopez, Leif Wilhelmsson
  • Publication number: 20240129949
    Abstract: A method is disclosed for a sensing coordination device associated with one or more wireless sensing devices comprising a first wireless sensing device. The method comprises determining a threshold value for the first wireless sensing device, wherein the threshold value is for comparison with a difference between channel estimates of wireless sensing measurements of the first wireless sensing device, and causing application of the threshold value in control of operation of the first wireless sensing device for performing wireless sensing measurements. A method for the first wireless sensing device is also disclosed.
    Type: Application
    Filed: February 12, 2021
    Publication date: April 18, 2024
    Inventors: Leif Wilhelmsson, Miguel Lopez, Hugo Tullberg
  • Publication number: 20240107345
    Abstract: A wireless communication device (11) maintains, on a first channel, a radio link to a further wireless communication device (10). The wireless communication device (11) sends, to the further wireless communication device (11), an indication that the wireless communication device supports multi-link operation. Further, the wireless communication device (11) receives a request from the further wireless communication device (10). In response to the request, the wireless communication device (11) utilizes the multi-link operation to perform at least one measurement on a second channel while maintaining the radio link to the further wireless communication device (10). Further, the wireless communication device (11) sends, to the further wireless communication device, one or more measurement reports representing the at least one measurement.
    Type: Application
    Filed: December 23, 2020
    Publication date: March 28, 2024
    Inventors: Miguel Lopez, Jonas Sedin, Abhishek Ambede, Leif Wilhelmsson
  • Patent number: 11943713
    Abstract: A wireless device features a low-power, limited-functionality, narrowband, homodyne wakeup receiver with a free running local oscillator. This enables a very attractive combination of low power consumption and high selectivity. The network supports these receivers by adopting a wakeup message structure that supports oscillator frequency calibration, and that tolerates loss of parts of the signal spectrum. Wakeup signals are transmitted frequently to allow the wakeup receivers (whether targeted by a wakeup signal or not) to calibrate their LO frequencies. The frequencies of the wakeup signals can be constant, or follow a hopping pattern for increased immunity to interference. The wakeup signals can use multiple carriers to increase robustness to loss of parts of the signal spectrum, particularly near the LO frequency in a homodyne receiver. The carriers use amplitude modulation (OOK), with either different or equal sequences.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: March 26, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Henrik Sjöland, Leif Wilhelmsson
  • Patent number: 11936509
    Abstract: A transmitter and method therein for transmitting a signal to a receiver in a wireless communication system are disclosed. The transmitter is configured to modulate a signal using two different modulations, a combination of binary amplitude shift keying, ASK, and binary frequency shift keying, FSK, and transmit the modulated signal.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: March 19, 2024
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Leif Wilhelmsson, Henrik Sjöland, Miguel Lopez
  • Patent number: 11929780
    Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless communication in communication networks comprising a wireless device, a radio access network node and a wireless light communication network node. In one embodiment, a method is performed by a node (102, 104, 120) of a wireless communication network (100), the wireless communication network comprising a wireless device (104), a radio access network node (102) and one or more wireless light communication (LC) network nodes (106). At least one of the wireless device and the radio access network node comprise a plurality of antenna elements configurable to provide a transmit or receive beam (110, 112) for communication with the other of the wireless device and the radio access network node.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: March 12, 2024
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Athanasios Stavridis, Miguel Lopez, Leif Wilhelmsson
  • Publication number: 20240080892
    Abstract: A method is disclosed for a sensing correction device. The sensing coordination device is associated with one or more sensing receiver devices and a radio access node configured for communication with one or more wireless communication devices. The method comprises selecting at least one of the sensing receiver devices in association with a time interval, instructing the selected sensing receiver devices to perform sensing measurements during the time interval, and causing transmission (during the time interval) of a communication packet between the radio access node and at least one of the wireless communication devices which differs from the selected at least one sensing receiver device. A method is also disclosed for a sensing receiver device.
    Type: Application
    Filed: January 25, 2021
    Publication date: March 7, 2024
    Inventors: Leif Wilhelmsson, Miguel Lopez
  • Patent number: 11910322
    Abstract: A limited-function, low-power wakeup receiver is based on frequency shift keying (FSK), avoiding the inherent problems of AM demodulation such as non-linearity of the amplitude detector. The FSK detector is easily realized in the digital domain. Due to the time discrete nature of FSK signals, the detector has a periodic response in frequency, allowing the signal to be demodulated at different offsets from the center frequency. The relaxed accuracy demands on the local oscillator frequency avoid the need for a power-hungry phase locked loop (PLL) circuit. To avoid potential loss if a signal coincides with one of the regular sensitivity nulls, the network at least occasionally transmits an FSK wakeup signal at a slightly shifted frequency, so at least one of the FSK wakeup signals will be received. Transmitting multiple frequency-shifted signals improves the likelihood of reception.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 20, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Henrik Sjöland, Leif Wilhelmsson
  • Publication number: 20240056282
    Abstract: Embodiments described herein relate to methods and apparatuses for optimizing interframe space in time division duplexing communication between a first wireless device and a second wireless device. A method in the first wireless device comprises receiving a first packet from the second wireless device; selecting an interframe space, IFS, duration from a plurality of possible IFS durations; and transmitting a second packet to the second wireless device when the selected IFS duration has elapsed after receipt of the first packet.
    Type: Application
    Filed: February 25, 2022
    Publication date: February 15, 2024
    Inventors: Leif Wilhelmsson, Per Skillermark
  • Publication number: 20240048424
    Abstract: A method is disclosed for transferring data symbols between a transmitter and a receiver. The method comprises specifying communication symbols through application of a transform to a representation of the data symbols, and conveying a signal indicative of the communication symbols from the transmitter to the receiver. When expressed as a transform matrix, the transform has at least the following properties: that a ratio (between number of zero-valued elements of the transform matrix and number of non-zero-valued elements of the transform matrix) equals or exceeds a sparsity threshold, and that a number of columns of the transform matrix that has a zero-valued element sum equals or exceeds an angle distortion mitigation threshold.
    Type: Application
    Filed: December 14, 2020
    Publication date: February 8, 2024
    Inventors: Miguel LOPEZ, Leif WILHELMSSON
  • Publication number: 20240040516
    Abstract: Apparatuses and methods are disclosed for joint downlink/uplink (DL/UL) scheduling and parameter selection for constrained simultaneous transmit and receive (STR) access point (AP) multi-link devices (MLDs). In one embodiment, a STR capable MLD includes an AP STA. The MLD is configured to jointly schedule an uplink communication on a first link and a simultaneous downlink communication on a second link by selecting a first non-access point (non-AP) station (STA) for the uplink communication and a second non-AP STA for the simultaneous downlink communication out of a plurality of non-AP STAs, the first and second links being a STR constrained pair of links, the first link being associated with the first non-AP STA, the second link being associated with the second non-AP STA, and the first and second non-AP STAs not being affiliated with a same MLD.
    Type: Application
    Filed: December 16, 2020
    Publication date: February 1, 2024
    Inventors: Rocco DI TARANTO, Leif WILHELMSSON, Abhishek AMBEDE, Miguel LOPEZ
  • Publication number: 20240031117
    Abstract: Apparatuses and methods for simultaneous transmit and receive (STR) multi-link operations (MLO) are disclosed. In one embodiment, a multi-link device (MLD) is configured to select at least one communication parameter value for a pair of radio links to enable STR on the pair of radio links between the MLD and a second MLD, the second MLD including a non-access point (non-AP) station (STA) and the selected at least one communication parameter value including a value of at least one of: at least one first communication parameter for a first link in the pair and at least one second communication parameter for a second link in the pair. In one embodiment, a MLD is configured to transmit information about a pair of radio links; and perform a multi-link operation (MLO) on the pair of radio links using at least one communication parameter value based at least in part on the transmitted information.
    Type: Application
    Filed: December 9, 2020
    Publication date: January 25, 2024
    Inventors: Abhishek AMBEDE, Leif WILHELMSSON, Miguel LOPEZ
  • Patent number: 11855785
    Abstract: A technique for performing a multi-layer transmission from a transmitting station to a receiving station on a radio frequency is described. The multi-layer transmission comprises multiple layers having different robustnesses (704, 706) on the radio frequency. As to a method aspect of the technique, first data of a first hybrid automatic repeat request, HARQ, process is transmitted on a first layer of the multi-layer transmission simultaneously with second data of a second HARQ process on a second layer of the multi-layer transmission.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 26, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Wilhelmsson, Rocco Di Taranto, Miguel Lopez, Jung-Fu Cheng