Patents by Inventor Field Liu

Field Liu 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: 9252905
    Abstract: A radio network node antenna management system dynamically manages a multi-antenna structure (200). The multi-antenna structure (200) includes a set of n antennas with beamforming capability. The antenna management system monitors a condition in a radio network cell served by the radio network node. If the monitored condition is less than or equal to a predetermined criteria, a beamforming operation is disabled and a subset, less than n, of the set of n antennas is managed according to a predetermined antenna hopping pattern.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: February 2, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Kathy Hu, Licong Huang, Mary Liang, Field Liu
  • Patent number: 9179388
    Abstract: The present invention discloses a method for handover of User Equipment (UE) a service connection being made via the UE, comprises: if fast cells are set up as base stations starts up, handover from a normal cell to a first fast cell with a radio bearer set up therein when the UE moving speed exceeds a threshold, set up a same radio bearer at a current fast cell as the radio bearer set up at the first fast cell when the UE is leaving the first fast cell for the current fast cell adjacent to the first fast cell, release the radio bearer at the first fast cell after the UE leaves the first fast cell, and re-registering into an adjacent normal cell when the service connection is terminated, or handover to the adjacent normal cell from the current fast cell when the measured moving speed of the UE is below the threshold.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: November 3, 2015
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Vincent Yu, Field Liu
  • Publication number: 20150010112
    Abstract: The invention relates to a method 10 performed in a user equipment 3, 4 of a communication system 1 for determining a beam-forming gain parameter, the communication system 1 comprising a base station 2 serving the user equipment 3, 4. The method 10 comprises: receiving 1 a cell-specific reference signal and a dedicated reference signal from the base station 2; measuring 12 a received power, PRSRP, of the cell-specific reference signal and a received power, PDRSRP, of the dedicated reference signal; and determining 13 a beam-forming gain parameter, GBF, based on the measured received power, PRSRP, of the cell-specific reference signal and on the measured received power, PDRSRP, of the dedicated reference signal. The invention also relates to user equipment, methods in base station, base station, computer programs and computer program products.
    Type: Application
    Filed: December 28, 2011
    Publication date: January 8, 2015
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Field Liu, Kathy Hu, Licong Huang
  • Publication number: 20140086071
    Abstract: A radio network node antenna management system dynamically manages a multi-antenna structure (200). The multi-antenna structure (200) includes a set of n antennas with beamforming capability. The antenna management system monitors a condition in a radio network cell served by the radio network node. If the monitored condition is less than or equal to a predetermined criteria, a beamforming operation is disabled and a subset, less than n, of the set of n antennas is managed according to a predetermined antenna hopping pattern.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 27, 2014
    Applicant: TELEFONAKTIEBOLAGETL M ERICSSON (PUBL)
    Inventors: Kathy HU, Licong HUANG, Mary LIANG, Field LIU
  • Publication number: 20130295931
    Abstract: The present invention discloses a method for handover of User Equipment (UE) a service connection being made via the UE, comprises: if fast cells are set up as base stations starts up, handover from a normal cell to a first fast cell with a radio bearer set up therein when the UE moving speed exceeds a threshold, set up a same radio bearer at a current fast cell as the radio bearer set up at the first fast cell when the UE is leaving the first fast cell for the current fast cell adjacent to the first fast cell, release the radio bearer at the first fast cell after the UE leaves the first fast cell, and re-registering into an adjacent normal cell when the service connection is terminated, or handover to the adjacent normal cell from the current fast cell when the measured moving speed of the UE is below the threshold.
    Type: Application
    Filed: January 25, 2011
    Publication date: November 7, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Vincent Yu, Field Liu