Patents by Inventor Yuantao Zhang

Yuantao Zhang 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: 9369878
    Abstract: A method for solving the co-existence problem, a base station, user equipment, and system for performing the method. The method includes: pre-configuring the information for co-existence working mode by a base station of a first communication system for a user equipment, receiving, by the base station of the first communication system from the user equipment in the first communication system, a mode establishing request for indicating the co-existence problem experienced by the user equipment and providing the assistance information for co-existence working mode in which the user equipment performs a first communication with the base station and performs a second communication with an apparatus in a second communication system which is different from the first communication system.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: June 14, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Lei Zhang, Xin Wang, Yuantao Zhang
  • Publication number: 20160157116
    Abstract: A user equipment receives a first measurement setting for synchronization signal detection, and a second measurement setting for radio resource management measurement. The first measurement setting includes a first gap length and a first measurement gap repetition period, and the second measurement setting includes a second gap length and a second measurement gap repetition period. The user equipment uses the first measurement setting to perform synchronization detection. In response to a small cell being detected, the user equipment provides a feedback indication on an indication channel. The user equipment then performs radio resource management measurement according to the second measurement setting.
    Type: Application
    Filed: August 8, 2013
    Publication date: June 2, 2016
    Inventors: Yuantao ZHANG, Zhi ZHANG, Kodo SHU
  • Patent number: 9351287
    Abstract: A method includes receiving downlink data transmitted by a base station via a primary and secondary component carrier in a predetermined order; detecting the received downlink data to obtain indication information on correctly receiving and wrongly receiving the downlink data, or no control information received, allocating corresponding uplink resources according to the primary and secondary component carrier where the detected downlink data is present; arranging the indication information obtained through detecting according to the order of transmitting the downlink data by the base station to obtain an indication information sequence; generating an uplink response signal and determining the uplink resources used to feed back the uplink response signal; transmitting the uplink response signal to the base station using the determined uplink resources, so the base station determines the downlink data retransmitted according to the uplink response signal fed back in the uplink resources, enabling the BS avoid u
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: May 24, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yuanrong Lan, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 9344160
    Abstract: A data transmission method and system, transmitter and receiver. The method includes: mapping, by a transmitter, a plurality of data streams to a plurality of antennas of the transmitter by using precoding matrices and transmitting the plurality of data streams to a receiver via the plurality of antennas, wherein the transmitter selects the precoding matrices by taking a resource block as a granularity. With the embodiments of the present invention, the transmitter may transmit data streams to the receiver by using the precoding matrices W, and selects the precoding matrices W by taking a resource block (RB) as a granularity, so as to support DM-RS demodulation, and the receiver is not needed to perform PMI feedback, which is also applicable to a scenario where user feedback is not supported or PMI feedback is inaccurate, thereby achieving open-loop spatial multiplexing CoMP transmission.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: May 17, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Jian Zhang, Yuantao Zhang, Yi Zhang, Yi Wang, Hua Zhou
  • Patent number: 9344261
    Abstract: A carrier aggregation system, includes transmitting a first signaling to configure one additional carrier to a user equipment (UE) at which the additional carriers are deactivated, to configure a timer to each additional carrier for the UE by which the carrier is deactivated after the corresponding timer expiry; transmitting a second signaling that carries an activation indication to the UE to activate one deactivated additional carrier in the configured carriers for the UE; activating at least one deactivated additional carrier, starting the timer, controlling the UE to start Physical Downlink Control Channel (PDCCH) monitoring and Physical Downlink Shared Channel (PDSCH) receiving on the activated additional carrier; transmitting PDCCH on the activated additional carrier for the UE, by which the corresponding timer being restarted; deactivating the activated carrier after the corresponding timer expiry, controlling the UE to stop the PDCCH monitoring and the PDSCH receiving on the deactivated additional car
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: May 17, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Haibo Xu, Yuantao Zhang, Hua Zhou, Jianming Wu, Yoshiaki Ohta
  • Publication number: 20160134413
    Abstract: Configuration of various radio systems may have a number of possible benefits. For example, small cell configuration may be useful for interference mitigation. A method, in certain embodiments, can include determining a virtual subframe index for a cell. The method can also include communicating the virtual subframe index for the cell by communicating a time division duplex configuration and a relative subframe offset.
    Type: Application
    Filed: June 28, 2013
    Publication date: May 12, 2016
    Inventors: Yuantao ZHANG, Haipeng LEI, Kodo SHU, Cássio RIBEIRO, Xiaolong LIU
  • Patent number: 9338729
    Abstract: Detecting interference user and home base station including: pre-configuring the cell type information of a home base station as an open cell type, and broadcasting the cell type information by the home base station in the cell; determining whether user equipment is one belonging to the home base station by the home base station according to the related information transmitted by the user equipment via a random access procedure, wherein the related information includes user information or a random access preamble; and determining by the home base station that the user equipment is an interference user, if the user equipment is not one belonging to the home base station.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: May 10, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Hongchao Li, Yi Zhang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Publication number: 20160112880
    Abstract: The present invention discloses a user equipment and a communication system. The user equipment configured in a first communication system comprises: a receiver for receiving pre-configured information for co-existence working mode from a base station in the first communication system; a processor for generating a mode establishing request for indicating a co-existence problem experienced by the user equipment and providing assistance information for co-existence working mode in which the user equipment performs a first communication with the base station of the first communication system and performs a second communication with an apparatus in a second communication system which is different from the first communication system; and a transmitter for transmitting the mode establishing request to the base station in the first communication system.
    Type: Application
    Filed: December 28, 2015
    Publication date: April 21, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Lei ZHANG, Xin WANG, Yuantao ZHANG
  • Patent number: 9313785
    Abstract: A cell identifier allocation apparatus and method, a base station, a readable program and a medium including acquiring location information of a macro base station and location information of each of a plurality of remote transmitting apparatuses connected to the macro base station; determining relative distances between the plurality of remote transmitting apparatuses and relative distances between the macro base station and each of the plurality of remote transmitting apparatuses; classifying the macro base station and the plurality of remote transmitting apparatuses into a plurality of sets, according to the relative distances between the plurality of remote transmitting apparatuses and the relative distances between the macro base station and each of the plurality of remote transmitting apparatuses; allocating cell identifiers to the plurality of remote transmitting apparatuses; and generating information to be transmitted to corresponding remote transmitting apparatus according to the allocated cell iden
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: April 12, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yi Zhang, Hua Zhou, Yuantao Zhang, Jianming Wu
  • Publication number: 20160081066
    Abstract: A method for transmitting uplink response signals, base station, mobile station and communication system, includes judging whether to use a downlink secondary component carrier to transmit data to a mobile station; if the judging result is positive, allocating resources according to the number of transmission blocks for transmitting the downlink data in the secondary component carrier, accordingly the mobile station is able to use the resources corresponding to a preconfigured primary component carrier and the resources allocated to the secondary component carrier to select uplink resources for transmitting response signals.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 17, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Yuantao ZHANG, Yi ZHANG, Yuanrong LAN, Hua ZHOU, Jianming WU
  • Publication number: 20160037440
    Abstract: This disclosure generally relates to cell discovery. In one embodiment, an association between a cell and an indicator index corresponding to one of a set of scrambling sequence indicators may be predefined. A first base station may transmit the set of scrambling sequence indicators to a second base station. The second base station may select an indicator from the indicators according to the predefined association, for generating a reference signal to be transmitted to user equipment. The user equipment may determine identification information of the cell based on the received reference signal and the predefined association, and transmit the identification information to the first base station. In this way, the user equipment may determine the identification information of the cell based on the received reference signal, and then transmit the identification information to the base station, such that the load on the base station may be reduced in the procedure of cell discovery.
    Type: Application
    Filed: September 30, 2014
    Publication date: February 4, 2016
    Inventors: Yuantao Zhang, Haitao Li
  • Publication number: 20160037488
    Abstract: This disclosure generally relates to radio resource control for D2D communication. In one embodiment, a master UE of the D2D communication may obtain radio resource information of a slave UE before performing radio resource configuration for the D2D communication between the master UE and the slave UE. Based on the radio resource information, the master UE may configure radio resource for the D2D communication. In this way, radio resource configuration may be performed for both the D2D communication and cellular communication without violating the slave UE's radio capability.
    Type: Application
    Filed: September 30, 2014
    Publication date: February 4, 2016
    Inventors: Haitao Li, Yuantao Zhang
  • Publication number: 20160037513
    Abstract: This disclosure generally relates to a discovery reference signal occasion configuration. In one embodiment, a time period for transmission of a discovery reference signal may be obtained, which comprises a plurality of consecutive subframes. Furthermore, at least one first subframe of the time period may be configured for transmission of discovery reference signals from activated small cells, and at least one second subframe of the time period may be configured for transmission of discovery reference signals from deactivated small cells, wherein the at least one second subframe is different from the at least one first subframe. In this way, the activated small cells and the deactivated small cells may transmit discovery reference signals in different subframes within the discovery reference signal occasion such that the interferences of transmission of discovery reference signals may be significantly reduced.
    Type: Application
    Filed: September 30, 2014
    Publication date: February 4, 2016
    Inventors: Yuantao Zhang, Haitao Li
  • Patent number: 9246565
    Abstract: The present invention relates to a User Equipment (UE), a base station and a method for selecting a Remote Radio Head (RRH). A UE, including: a storage unit configured to store a code book including a plurality of precoding matrixes which contain a precoding matrix having an element zero corresponding to an antenna; a precoding matrix selection unit configured to select the precoding matrix to be used according to the code book stored in the storage unit; and a report unit configured to report an index of the precoding matrix selected by the precoding matrix selection unit. In the preferred embodiments, elements of a same precoding matrix for antennas of same RRH are all zero or non-zero.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: January 26, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou
  • Patent number: 9237454
    Abstract: A method for solving the co-existence problem, a base station, user equipment, and system for performing the method. The method includes: pre-configuring the information for co-existence working mode by a base station of a first communication system for a user equipment, receiving, by the base station of the first communication system from the user equipment in the first communication system, a mode establishing request for indicating the co-existence problem experienced by the user equipment and providing the assistance information for co-existence working mode in which the user equipment performs a first communication with the base station and performs a second communication with an apparatus in a second communication system which is different from the first communication system.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: January 12, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Lei Zhang, Xin Wang, Yuantao Zhang
  • Patent number: 9232508
    Abstract: A method for transmitting uplink response signals, base station, mobile station and communication system, includes judging whether to use a downlink secondary component carrier to transmit data to a mobile station; if the judging result is positive, allocating resources according to the number of transmission blocks for transmitting the downlink data in the secondary component carrier, accordingly the mobile station is able to use the resources corresponding to a preconfigured primary component carrier and the resources allocated to the secondary component carrier to select uplink resources for transmitting response signals.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: January 5, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yuantao Zhang, Yi Zhang, Yuanrong Lan, Hua Zhou, Jianming Wu
  • Publication number: 20150327245
    Abstract: Communication systems may benefit from a control channel for contention based transmission and collision avoidance. For example, communication systems of the third generation partnership project (3GPP) long term evolution (LTE) and LTE-Advanced may use such control channels for contention based transmission. In particular, such control channels may be valuable with respect to LTE-based local area network (LTE-LAN). A method, according to certain embodiments, may include preparing control information for a contention based physical uplink shared channel. The method may also include transmitting and/or receiving the control information on a physical uplink control channel and a control only physical uplink shared channel, or only on the control only physical uplink shared channel.
    Type: Application
    Filed: August 3, 2012
    Publication date: November 12, 2015
    Applicant: Nokia Corporation
    Inventors: Jianchi Zhu, Zhi Zhang, Haipeng Lei, Yuantao Zhang, Frank Frederiksen
  • Patent number: 9173214
    Abstract: A method, user equipment, base station and system for determining a component carrier scheduled in cross-carrier scheduling. The method for determining the scheduled component carrier includes: a user equipment (UE) detects scheduling information sent by a base station in a first dedicated searching space corresponding to a scheduling component carrier, the first dedicated searching space includes at least one candidate physical downlink control channel (PDCCH) (101); detecting at least one candidate physical downlink control channel (PDCCH) to obtain a current physical downlink control channel (PDCCH) which belongs to the user equipment (UE) (102); determining a scheduled component carrier corresponding to the current physical downlink control channel (PDCCH) according to the location of the current physical downlink control channel (PDCCH) and the carried carrier indicator field (CIF) value thereof (103).
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: October 27, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Jike Li, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Publication number: 20150237610
    Abstract: A method for neighbor cell assisted TDD configurations is described. The method includes receiving, from a serving cell, a first configuration. The first configuration is a cell specific configuration which indicates a first set of individual configurations for each of a plurality of SFs. A second configuration is received from the serving cell. The second configuration is a UE specific configuration which indicates a second set of individual configurations for each of the plurality of SFs. The method includes determining whether a given SF is configured differently in the first configuration than in the second configuration. In response to determining that the given SF is configured differently in the first configuration than in the second configuration, the method also includes communicating, with a neighbor cell, in the given SF as configured in the second configuration. Apparatus and computer readable media are also described.
    Type: Application
    Filed: November 6, 2012
    Publication date: August 20, 2015
    Inventors: Yuantao Zhang, Haipeng Lei, Jianchi Zhu, Zhi Zhang, Kodo Shu
  • Publication number: 20150230153
    Abstract: A macro eNB (MeNB) triggers a small cell (eLA eNB) to transmit a sequence on a second frequency band using a triggering command that indicates a time to transmit the sequence. On a first frequency band the MeNB triggers at least one user equipment UE to detect the sequence on the second band, and this trigger also has a first indication of when the sequence will be transmitted. From a second indication the MeNB receives on the first band from the at least one UE in response to the triggering of the UE the MeNB can determine whether the UE is located proximate to the small cell. The indication may be as little as a single bit indicating whether the UE detected or not the sequence. The first and second bands may be on first and second component carriers that may not be synchronized to one another, and the aperiodic nature of the triggered sequences and detection reports saves UE power.
    Type: Application
    Filed: September 3, 2012
    Publication date: August 13, 2015
    Applicant: NOKIA CORPORATION
    Inventors: Yuantao Zhang, Zhi Zhang, Jianchi Zhu, Haipeng Lei, Kodo Shu