Patents by Inventor Aijun Cao

Aijun Cao 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: 9769690
    Abstract: A discovery signal measurement method, base station and terminal, wherein the method includes: a base station determining measurement patterns used by different terminals for measuring discovery signals according to transmission patterns of discovery signals; the base station configuring measurement patterns corresponding to the terminals for the terminals; the base station transmitting the discovery signals in cells corresponding to the transmission pattern according to the transmission patterns. The method, base station and terminal according to the embodiment of the present invention provide a definite solution for configuring measurement patterns of discovery signals.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: September 19, 2017
    Assignee: ZTE Corporation
    Inventors: Linmei Mo, Yajun Zhao, Hanqing Xu, Yonghong Gao, Aijun Cao
  • Patent number: 9743283
    Abstract: A new approach to deployment of a hybrid node in a cellular communication network is proposed, wherein the hybrid node includes a plurality of antennas that simultaneously serve a plurality of cells in the cellular communication network by transmitting or receiving signals to or from the cells at the same time. The cellular communication network further includes a partner cell among the plurality of cells served by the hybrid node, wherein the partner cell is a soft cell that maintains communication channels with antennas of more than one node at the same time. The cellular communication network further includes a hybrid cell among the plurality of cells also served by the hybrid node, wherein the hybrid cell is a hard cell that maintains communication channels with antennas of only one node at any one time.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: August 22, 2017
    Assignee: ZTE WISTRON TELECOM AB
    Inventors: Patrick Svedman, Aijun Cao, Yonghong Gao
  • Publication number: 20170181067
    Abstract: Provided is a method and wireless communication system that includes a HetNet, a serving cell with an associated coverage area and multiple additional low power nodes (LPNs) deployed in one or more clusters of cells in the coverage area. The LPNs transmit an associated discovery signal based on the timing of the associated small cell. The serving cell is configured to determine the timing of the cells and therefore the transmission pattern of the discovery signals and the serving cell configures measurement gaps such that the discovery signals are transmitted during the measurement gaps. The network is adapted to accomplish this for various degrees of granularity and timing measurement inaccuracies by placing the measurement gaps and/or adjusting the discovery signal (DS) transmission scheme accordingly.
    Type: Application
    Filed: March 16, 2015
    Publication date: June 22, 2017
    Inventors: Thorsten SCHIER, Patrick SVEDMAN, Aijun CAO, Jan JOHANSSON, Yonghong GAO, Bojidar HADJISKI
  • Publication number: 20170181065
    Abstract: A serving cell configures a search window within which a UE searches to find a discovery burst. The discovery burst may include PSS, SSS, DS, CSI-RS or other signals. The UE detects synchronization signals and determines if the synchronization signals are part of the discovery burst by detecting signal properties to distinguish them from legacy or other synchronization signals. One property is the time difference between a PSS and an SSS in a discovery burst. Other properties are the frequency difference between a PSS and an SSS, and the sequence of the synchronization signals. If the UE determines that the synchronization signals are part of the discovery burst, the UE performs RRM measurements on other signals in the discovery burst, and reports the measurements results to a serving cell. The serving cell decides if a UE should be handed over to the measured cell based on the measurement reports.
    Type: Application
    Filed: March 26, 2015
    Publication date: June 22, 2017
    Inventors: Patrick SVEDMAN, Yonghong GAO, Jan JOHANSSON, Thorsten SCHIER, Aijun CAO, Bojidar HADJISKI
  • Publication number: 20170026950
    Abstract: A mobile terminal, method and non-transitory computer-readable medium for simultaneously utilizing at least two different radio access technologies (RATs). In one embodiment, the mobile terminal includes: at least one processor configured to control and coordinate first and second radio resource control functions corresponding to first and second RATs, respectively; and map a logical channel to first and second transport channels corresponding to the first and second RATs.
    Type: Application
    Filed: July 15, 2016
    Publication date: January 26, 2017
    Inventors: Aijun CAO, Yonghong GAO, Jan JOHANSSON, Patrick SVEDMAN, Thorsten SCHIER, Bojidar HADJISKI
  • Publication number: 20170026880
    Abstract: A network node, method and non-transitory computer-readable medium for simultaneously utilizing at least two different radio access technologies (RATs). In one embodiment, the network node includes at least one processor configured to: activate a first radio resource control (RRC) component corresponding to a first RAT, wherein the first RAT is a default RAT of a mobile terminal configured to communicate with the network node; determine whether a second RAT is available to the mobile terminal based on at least one predetermined criterion; and if the second RAT is available, activate a second RRC component corresponding to the second RAT, wherein both the first RAT and the second RAT are active at the same time to communicate with the mobile terminal.
    Type: Application
    Filed: July 15, 2016
    Publication date: January 26, 2017
    Inventors: Aijun CAO, Yonghong GAO, Jan JOHANSSON, Patrick SVEDMAN, Thorsten SCHIER, Bojidar HADJISKI
  • Publication number: 20170010343
    Abstract: This invention provides a system and methods for tracking the positions and behaviors of moving objects such as animals. In one embodiment, the system comprises one or more tracking unit, one or more base nodes, one or more remote data hubs, and one or more remote processor with display. Each tracking unit (e.g. attached or inserted into the tracked animals) could transmit acoustic signal with a unique signature. The base nodes, after time stamping the received signals, relate the signals to the remote processors where the signals will be processed and the 3-dimensional spatial coordinates of the tracking units, and hence the animals, can be identified. Further processing of the positional information would reflect the activities and behaviors of each animal. Additional sensors included in the tracking unit provide further information about the states of the animals such as temperature, heart rate or blood pressure etc.
    Type: Application
    Filed: September 12, 2016
    Publication date: January 12, 2017
    Inventors: Chi Shing CHAN, Aijun CAO
  • Patent number: 9470776
    Abstract: This invention provides a system and methods for tracking the positions and behaviors of moving objects such as animals. In one embodiment, the system comprises one or more tracking unit, one or more base nodes, one or more remote data hubs, and one or more remote processor with display. Each tracking unit (e.g. attached or inserted into the tracked animals) could transmit acoustic signal with a unique signature. The base nodes, after time stamping the received signals, relate the signals to the remote processors where the signals will be processed and the 3-dimensional spatial coordinates of the tracking units, and hence the animals, can be identified. Further processing of the positional information would reflect the activities and behaviors of each animal. Additional sensors included in the tracking unit provide further information about the states of the animals such as temperature, heart rate or blood pressure etc.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: October 18, 2016
    Assignee: CASCUBE LTD
    Inventors: Chi Shing Chan, Aijun Cao
  • Publication number: 20160301493
    Abstract: A method of small cell discovery in a wireless network deployment using a Channel State Information Reference System (CSI-RS) is proposed. First, a wireless communication system allocates pairs of resource elements in each resource block of a subframe to a CSI-RS configuration. A first of two orthogonal cover codes is applied to the first CSI-RS. The CSI-RS is transmitted by a small cell to a user equipment (UE). The UE utilizes the CSI-RS to perform small cell discovery and measurement of the small cell.
    Type: Application
    Filed: December 11, 2014
    Publication date: October 13, 2016
    Inventors: Aijun CAO, Yonghong GAO, Thorsten SCHIER, Jan JOHANSSON, Patrick SVEDMAN, Bojidar HADJISKI
  • Patent number: 9451597
    Abstract: The present document discloses an apparatus for receiving Physical Uplink Control Channel (PUCCH) in Long Term Evolution (LTE) system, comprising: blocks of system FFT performing system FFT on data from a plurality of antennas, blocks of PUCCH RB processing units receiving the allocated logic resource index table and the local base sequence and output of the blocks of system FFT, and generating DMRS despread outputs and data values; a block of SR detection for receiving the data values and the DMRS despread outputs, and for generating SR detection results; blocks of user data extraction receiving data values and DMRS despread outputs, and performing user data extraction; blocks of PUCCH user processing units receiving an orthogonal sequence index, the data values and an output from blocks of user extraction, and generating a ACK/NAK/CQI signal for a concerned UE.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: September 20, 2016
    Assignee: ZTE Corporation
    Inventors: Aijun Cao, Jan Johansson, Xiaoming Su, Yujie Li
  • Publication number: 20160269990
    Abstract: A new approach to generating a probing signal by a cell in a heterogeneous network (HetNet) deployment is proposed. A small cell in the HetNet may be switched off by a base station when the small cell is not needed. The small cell is configured to alternate between an off-state and on-state. The small cell maintains the on-state for a predetermined probing period and maintains the off-state for a predetermined off period. The small cell may switch between the on-state and the off-state periodically. The small cell may be activated during a predetermined off period to transmit data to a user device.
    Type: Application
    Filed: October 31, 2014
    Publication date: September 15, 2016
    Inventors: Patrick SVEDMAN, Thorsten SCHIER, Yonghong GAO, Jan JOHANSSON, Aijun CAO, Bojidar HADJISKI
  • Publication number: 20160242105
    Abstract: The proposed approach comtemplates systems and methods configured to utilize a modified reference signal to facilitate efficient discovery of as many cells as possible within one channel state information reference signal (CSI-RS) sub-frame while maintaining certain detection and measurement performance. The proposed approach is configured to unambiguously discover at least the number of anticipated small cells within one cluster and to further identify all small cells within the coverage area of a base station/macro cell. In some embodiments, frequency multiplexing is utilized to allow different cells to transmit their discovery signals on different physical resource blocks (PRBs) rather than one cell using every PRB over the entire system bandwidth.
    Type: Application
    Filed: September 11, 2014
    Publication date: August 18, 2016
    Inventors: Thorsten SCHIER, Patrick SVEDMAN, Aijun CAO, Yonghong GAO, Jan JOHANSSON, Bojidar HADJISKI
  • Publication number: 20160234878
    Abstract: The proposed approach contemplates systems and methods configured to transmit signals irregularly (sparsely) over a mobile communication network (carrier) in which reception gaps apply while increasing the likelihood that receivers will receive a signal at least once during a certain time period, called irregular signal period. First, a set of transmission offsets is selected, the transmission offsets defining a relative transmission time in a burst, such that if a burst would be transmitted using the selected transmission offsets, a receiver with any valid reception gap configuration would receive at least one signal in its whole duration. Then, during an irregular signal period, signals are transmitted in a sequence of one or more consecutive bursts using each of the transmission offsets in the selected set at least once, wherein the sequence of bursts may be preceded and/or followed by a period of no signal transmission.
    Type: Application
    Filed: September 16, 2014
    Publication date: August 11, 2016
    Inventors: Patrick SVEDMAN, Yonghong GAO, Aijun CAO, Thorsten SCHIER, Bojidar HADJISKI, Jan JOHANSSON
  • Publication number: 20160218837
    Abstract: A method and system for transmitting data to user equipment (UE) is disclosed. In one embodiment, the system includes: a downlink transmitter configured to transmit a first data unit to the UE using a first transmission process assigned to the UE; an uplink receiver configured to receive a status signal indicating either a successful or unsuccessful reception of the first data unit by the UE; and a downlink scheduler, communicatively coupled to the downlink transmitter and uplink receiver, and configured to receive the status signal from the uplink receiver, wherein the downlink scheduler is further configured to schedule transmission of a second data unit to the UE and transmit a corresponding scheduling decision to the downlink transmitter prior to receiving the status signal, and wherein upon receiving the scheduling decision, the downlink transmitter transmits the second data unit to the UE using a second transmission process assigned to the UE.
    Type: Application
    Filed: March 14, 2014
    Publication date: July 28, 2016
    Inventors: Patrick SVEDMAN, Jan JOHANSSON, Thorsten SCHIER, Bojidar HADJISKI, Aijun CAO, Yonghong GAO
  • Publication number: 20160219425
    Abstract: In a heterogeneous network deployment that includes a macro base station and one or more low power nodes, a discovery signal is transmitted to facilitate the identification of low power nodes. The discovery signal is transmitted on a selected subset of resource elements, previously unused, to maintain backward compatibility with legacy user equipment. The transmission sequence and/or the locations of resource elements used for transmitting the discovery signal can identify the low power node to a user equipment.
    Type: Application
    Filed: September 25, 2014
    Publication date: July 28, 2016
    Inventors: Thorsten Schier, Patrick Svedman, Aijun Cao, Yonghong Gao, Jan Johansson, Bojidar Hadjiski
  • Publication number: 20160212647
    Abstract: A discovery signal measurement method, base station and terminal, wherein the method includes: a base station determining measurement patterns used by different terminals for measuring discovery signals according to transmission patterns of discovery signals; the base station configuring measurement patterns corresponding to the terminals for the terminals; the base station transmitting the discovery signals in cells corresponding to the transmission pattern according to the transmission patterns. The method, base station and terminal according to the embodiment of the present invention provide a definite solution for configuring measurement patterns of discovery signals.
    Type: Application
    Filed: June 19, 2014
    Publication date: July 21, 2016
    Inventors: Linmei MO, Yajun ZHAO, Hanqing XU, Yonghong GAO, Aijun CAO
  • Publication number: 20160192264
    Abstract: An auxiliary cell identity (ACI) is proposed besides the conventional physical cell identity carried on the synchronization channels. The ACI is designed and configured to be transmitted in one or more primary regions and one or more secondary regions and transmitted by a base station/cell to a plurality of user equipment (UEs) located within coverage of the cell in one or more transmissions. Each of the UEs is configured to detects the transmitted ACI and identifies the cell based on the detected ACI.
    Type: Application
    Filed: July 17, 2014
    Publication date: June 30, 2016
    Inventors: Aijun CAO, Thorsten SCHIER, Yonghong GAO, Jan JOHANSSON, Patrick SVEDMAN, Bojidar HADJISKI
  • Patent number: 9363063
    Abstract: In a heterogeneous wireless network that includes a macro base station and one or more micro base stations, a wireless device to wirelessly transmit, in a first time slot at a first position in a first transmission subframe, data over a first physical communication channel. An ACK/NACK control message is received over a backhaul network connection a first time period after the first time slot. A response message is transmitted to the wireless device such that when the control message is received prior to the second time slot, then the response message uses data reception information from the control message and when the control message is not received prior to the second time slot, then the response message indicates that the data was successfully received.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: June 7, 2016
    Assignees: ZTE Wistron Telecom AB, ZTE Corporation
    Inventors: Nan Li, Thorsten Schier, Patrick Svedman, Yonghong Gao, Aijun Cao, Jan Johansson, Bojidar Hadjiski
  • Publication number: 20160157194
    Abstract: Provided is a synchronization cell used in a wireless communication system. Also provided is an SCI, synchronization cell indicator. A mobile network includes a processor that identifies one or more suitable synchronization cells for a user equipment (UE) and sends the SCI to the UE so that the UE can at least partially synchronize with a synchronization cell. The SCI advantageously includes a cell-id and other synchronization parameters and characteristics in various embodiments. The SCI may include a cell-directed UE action for the UE to carry out with a target cell. The UE carries out cell-directed UE actions with the target cell either after having obtained synchronization with the synchronization cell or to continue the synchronization process.
    Type: Application
    Filed: July 21, 2014
    Publication date: June 2, 2016
    Inventors: Patrick SVEDMAN, Thorsten SCHIER, Yonghong GAO, Jan JOHANSSON, Aijun CAO, Bojidar HADJISKI
  • Patent number: 9357528
    Abstract: In a heterogeneous network deployment that includes one or more macro base stations and one or more low power nodes, a technique can be provided to encode network operational information using phase differences in synchronization signals transmitted by a network node. The synchronization signals may be one of the first signals that a user equipment (UE) attempts to locate when attempting to join a wireless network. The phase-encoded network operational information indicates to the UE where to locate a geometry indicator transmission from a low power node that is a part of the network, but is not the node that transmits the synchronization signals. The geometry indicator transmission may include identity information for the transmitting node and may be transmitted at a pre-determined nominal transmit power.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: May 31, 2016
    Assignee: ZTE Wistron Telecom AB
    Inventors: Yonghong Gao, Aijun Cao, Jan Johansson, Patrick Svedman, Thorsten Schier, Bojidar Hadjiski