Patents by Inventor Claes Tidestav

Claes Tidestav 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: 10419987
    Abstract: A UE (22) in handover consideration transmits an uplink measurement signal comprising repetitions of a predetermined identity code. Network access nodes (18, 20) that are candidate handover target nodes receive the signal and use it for channel quality and timing offset measurements. To ensure that a predetermined minimum number of symbols are received without interference from user traffic, an uplink measurement signal reception window is defined for each candidate node (18, 20). The timing of the reception window is based on a total timing misalignment between the UE (22) and the candidate node. In some embodiments, the duration of the reception window is based on an uncertainty in the timing misalignment estimate. Reception of user data is precluded during the uplink measurement signal reception window (on the allocated subband, if the full uplink carrier is not used). The UE transmits the uplink measurement signal in an uplink measurement signal transmission window.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: September 17, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Andres Reial, Rui Fan, Johan Rune, Claes Tidestav
  • Publication number: 20190281509
    Abstract: The present disclosure relates to methods and arrangements for performing wireless device assisted handover form a source access node to a target access node. Performed in a wireless device, the method comprises performing (S31) one or more mobility measurements for corresponding candidate radio links and transmitting (S33) a first radio link measurement report, comprising the mobility measurements for a recommended target link, using a first radio link reporting mechanism to the source access node. When communication over a target link is not initiated under a predetermined condition, the method comprises transmitting a second radio link measurement report, for the one or more candidate radio links, on the recommended target link using a second radio link reporting mechanism different from the first radio link reporting mechanism.
    Type: Application
    Filed: September 30, 2016
    Publication date: September 12, 2019
    Inventors: Claes Tidestav, Icaro L. J. Da Silva, Qingyu Miao, Johan Rune, Zhang Zhang
  • Publication number: 20190280756
    Abstract: A method for random access for beam failure recovery. In the method, specific random access configuration for the beam failure recovery is received. In the event of a beam failure, a random access procedure is performed according to the specific random access configuration.
    Type: Application
    Filed: August 17, 2018
    Publication date: September 12, 2019
    Inventors: Rui FAN, Icaro L. J. DA SILVA, Helka-Liina MÄÄTTANEN, Claes TIDESTAV
  • Publication number: 20190261238
    Abstract: A wireless device in a wireless communication system is configured to perform measurements on a set of candidate links for supporting a network node in the system to make a decision as to which of the candidate links is to be a target link for a link switch. The wireless device reports (e.g., at the physical layer) measured candidate links one link subset at a time in order of the wireless device's preference for the target link, until the wireless device receives a target indication signal indicating which of the candidate links in the set is to be the target link. Any given link subset reports one or more candidate links which the wireless device has measured for the decision. Responsive to receiving the target indication signal, the wireless device performs the link switch to the indicated target link.
    Type: Application
    Filed: May 3, 2019
    Publication date: August 22, 2019
    Inventors: Andres Reial, Qingyu Miao, Edgar Ramos, Johan Rune, Claes Tidestav, Zhang Zhang
  • Publication number: 20190261344
    Abstract: Some embodiments of this disclosure provide a method performed by one or more transmission points, TRPs, for communicating with a user equipment, UE. In some embodiments, the method includes: using a first transmit, TX, beam to communicate with the UE; receiving, from the UE, information indicating that the UE has determined that the first TX beam has experienced a beam failure; and after the information is received, using a second TX beam to communicate with the UE.
    Type: Application
    Filed: April 30, 2019
    Publication date: August 22, 2019
    Applicant: Telefonaktiebolaget LM Ericsson ( publ)
    Inventors: Stephen GRANT, Mattias Frenne, Andreas Nilsson, Claes Tidestav
  • Publication number: 20190261230
    Abstract: The present disclosure relates to methods and arrangements for performing wireless device assisted handover form a source access node to a target access node. Performed in a wireless device, the disclosure presents a method for performing wireless device assisted handover from a source access node to a target access node in a wireless network. The methed comprises performing (S31) one or more mobility measurements for corresponding candidate radio links and selecting (S32), from the one or more candidate radio links, an initial target link based on the performed one or more mobility measurements. A first radio link measurement report, based on the one or more mobility measurements, identifying the initial target link, is transmitted (S33) to the source target node using a first radio link reporting mechanism whereupon communication over the initial target link is initiated (S34).
    Type: Application
    Filed: September 30, 2016
    Publication date: August 22, 2019
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Andres Reial, Rui Fan, Qingyu Miao, Edgar Ramos, Johan Rune, Claes Tidestav, Stefan Wager, Zhang Zhang
  • Patent number: 10390269
    Abstract: The embodiments disclose a method in an access node of a wireless network. The method comprises a step of performing a first uplink signal quality measurement, a step of receiving a first downlink signal quality, a step of determining a downlink signal quality mapping function based on a first uplink signal quality in the first uplink signal quality measurement and the first downlink signal quality, a step of performing a second uplink signal quality measurement and a step of deriving a second downlink signal quality based on the downlink signal quality mapping function and a second uplink signal quality in the second uplink signal quality measurement. According to one or more aspects of the disclosure, there are also provided corresponding access nodes.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: August 20, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rui Fan, Andres Reial, Claes Tidestav, Johan Rune
  • Patent number: 10374680
    Abstract: There is provided a method and a network node for allocating and transmitting Mobility Reference Signals, MRS, for a communication device to measure beam signal quality in a wireless communication network. The network node obtains information on one or more of a frequency diversity, a time diversity of a channel between the network node and the communication device, an antenna spatial diversity of the communication device. The network node selects an MRS pattern out of a set of candidate patterns based on the received information, signals the selected MRS pattern to the communication device and transmits the MRS according to the selected MRS pattern.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: August 6, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Andres Reial, Andreas Cedergren, Claes Tidestav
  • Publication number: 20190239129
    Abstract: The present invention relates to handling data transfer during handover, whereby a terminal device is initially connected to a serving access node and a handover is performed to connect the terminal device to a target access node. The improved handling of data transfer is achieved by upon making a handover decision, performing data rerouting to the target access node while continuing to exchange data between the terminal device and the serving access node, and stopping the data exchange between the terminal device and the serving access node in response to an indicator indicating that the target access node is ready to proceed with the handover.
    Type: Application
    Filed: October 11, 2016
    Publication date: August 1, 2019
    Inventors: Claes TIDESTAV, Edgar RAMOS, Andres REIAL, Johan RUNE, Zhang ZHANG
  • Publication number: 20190223185
    Abstract: Radio network nodes, wireless devices, and related methods are provided in which a pseudo-random sequence initialization value, which is used during the generation of pseudo-random and/or scrambling sequences, is based, at least in part, on a first identifier, wherein the first identifier is equal to a first parameter if the first parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Inventors: Stefan PARKVALL, Robert BALDEMAIR, Claes TIDESTAV, Mattias FRENNE
  • Publication number: 20190215737
    Abstract: The present disclosure relates to methods and arrangements for performing wireless device assisted handover form a source access node to a target access node. Performed in a wireless device, a method comprises performing (S31) one or more mobility measurements for corresponding candidate radio links and selecting (S32), from the one or more candidate radio links, an initial target link based on the performed one or more mobility measurements. A first radio link measurement report based on the one or more mobility measurements, identifying the initial target link is transmitted (S33) to a target node providing the initial target link, using a first radio link reporting mechanism. A second radio link measurement report for the one or more candidate radio links and based on the same one or more mobility measurements, is transmitted (S34) to the source access node using a second radio link measurement report different from the first radio link reporting mechanism.
    Type: Application
    Filed: September 30, 2016
    Publication date: July 11, 2019
    Inventors: Andres Reial, Rui Fan, Qingyu Miao, Edgar Ramos, Johan Rune, Claes Tidestav, Zhang Zhang
  • Patent number: 10334489
    Abstract: There is provided a method for handling mobility synchronization measurements. The method is performed by a wireless device. The method comprises receiving an indication to perform mobility measurements on a set of transmission beams associated with a unique identity. The method comprises checking if the unique identity has previously been stored by the wireless device. The method comprises, if the unique identity has not previously been stored by the wireless device, performing mobility measurements on the set of transmission beams to determine synchronization information of the set of transmission beams. The method comprises storing the unique identity and the synchronization information of the mobility measurements.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: June 25, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Andreas Cedergren, Andres Reial, Claes Tidestav
  • Patent number: 10334453
    Abstract: A method of neighbor cell detection performed in a communication device is disclosed. The method comprises selecting at least one subband-time interval resource for processing, wherein each subband is part of a system frequency bandwidth and each time interval is a part of a synchronization signal repetition time period, recording one or more radio samples associated with the at least one subband-time interval resource, executing cell detection on the recorded radio samples, and repeating the selecting, recording and executing until a stop criterion is fulfilled. A corresponding communication device computer program and computer program product are also provided.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: June 25, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Joakim Axmon, Bengt Lindoff, Reza Moosavi, Claes Tidestav, Edgar Ramos
  • Patent number: 10327183
    Abstract: A wireless device in a wireless communication system is configured to perform measurements on a set of candidate links for supporting a network node in the system to make a decision as to which of the candidate links is to be a target link for a link switch. The wireless device reports (e.g., at the physical layer) measured candidate links one link subset at a time in order of the wireless device's preference for the target link, until the wireless device receives a target indication signal indicating which of the candidate links in the set is to be the target link. Any given link subset reports one or more candidate links which the wireless device has measured for the decision. Responsive to receiving the target indication signal, the wireless device performs the link switch to the indicated target link.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 18, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Andres Reial, Qingyu Miao, Edgar Ramos, Johan Rune, Claes Tidestav, Zhang Zhang
  • Publication number: 20190181938
    Abstract: There is provided a method and a network node for allocating and transmitting Mobility Reference Signals, MRS, for a communication device to measure beam signal quality in a wireless communication network. The network node obtains information on one or more of a frequency diversity, a time diversity of a channel between the network node and the communication device, an antenna spatial diversity of the communication device. The network node selects an MRS pattern out of a set of candidate patterns based on the received information, signals the selected MRS pattern to the communication device and transmits the MRS according to the selected MRS pattern.
    Type: Application
    Filed: January 28, 2019
    Publication date: June 13, 2019
    Inventors: Andres Reial, Andreas Cedergren, Claes Tidestav
  • Patent number: 10306574
    Abstract: A synchronising assisting device (14) sends an adjustment value (AV) to a mobile station (12) for use when synchronising to a resource employed by the target cell (17), where the adjustment value (AV) is an estimate of the change in timing required to synchronise to a reference signal interval of the resource, and processes the adjustment value (AV) if an indication (IATC) of the actual change in timing required for synchronizing to the reference signal interval is received from the mobile station. The mobile station receives the adjustment value (AV), synchronises to the resource starting at a starting point set by the adjustment value (AV), detects a pilot signal in the reference signal interval, determines an actual change in timing required for synchronising to the reference signal interval, investigates the difference and sends an indication (IATC) of the required actual change in timing to the synchronising assisting device (14).
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: May 28, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Claes Tidestav, Andreas Cedergren, Andres Reial
  • Publication number: 20190158169
    Abstract: There is provided a method and a network node for allocating and transmitting Mobility Reference Signals, MRS, for a communication device to measure beam signal quality in a wireless communication network. The network node obtains information on one or more of a frequency diversity, a time diversity of a channel between the network node and the communication device, an antenna spatial diversity of the communication device. The network node selects an MRS pattern out of a set of candidate patterns based on the received information, signals the selected MRS pattern to the communication device and transmits the MRS according to the selected MRS pattern.
    Type: Application
    Filed: January 28, 2019
    Publication date: May 23, 2019
    Inventors: Andres Reial, Andreas Cedergren, Claes Tidestav
  • Publication number: 20190097697
    Abstract: A method of selecting a codebook is disclosed. The method is performed in a network node and includes: determining whether to use single-user multiple-input-multiple output, SU-MIMO, or multi-user multiple-input-multiple output, MU-MIMO, in a cell (C1) controlled by the network node, and selecting, based on the determining, a first codebook or a second codebook for use in communication with a communication device within the cell (C1). The first codebook is configured for SU-MIMO communication and the second codebook is configured for MU-MIMO communication. A network node, computer program and computer program product are also disclosed.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 28, 2019
    Inventors: Henrik ASPLUND, Martin JOHANSSON, Andreas NILSSON, Claes TIDESTAV
  • Patent number: 10244499
    Abstract: A method for operating a wireless communications device. The wireless communications device transmits a signal, to a target network node, with a timing that is based on a first timing indication, and a second timing indication associated with the target network node.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: March 26, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Johan Rune, Rui Fan, Andres Reial, Claes Tidestav
  • Publication number: 20190081684
    Abstract: An access node transmits, in a downlink signal having a series of subframes, a beam-formed reference signal in subframes, where the beam-formed reference signals are transmitted in fewer than all of the subframes of the downlink signal. A first subset includes beam-formed reference signals corresponding to a first frequency or first localized range of frequencies, and a second subset includes beam-formed reference signals corresponding to a second frequency or second localized range of frequencies. The second frequency or second localized range of frequencies is spaced apart from and differing from the first frequency or first localized range of frequencies. A user equipment, UE, receives, in the downlink signal, the beam-formed reference signal in each of a plurality of subframes. The UE performs mobility management measurements using at least the first subset of the received beam-formed reference signals and performs RLM using the second subset of the received beam-formed reference signals.
    Type: Application
    Filed: November 3, 2017
    Publication date: March 14, 2019
    Inventors: Icaro L. J. da Silva, Rui Fan, Pradeepa Ramachandra, Claes Tidestav, Umut Ugurlu