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: 9825725
    Abstract: Code generating including generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: November 21, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 9788300
    Abstract: Systems, methods, apparatuses, and computer program products for narrow band internet of things (NB-IoT) paging optimization are provided. One method includes, when extended discontinuous reception (eDRX) is not configured for a user equipment (UE), applying a maximum repetition number of each coverage enhancement (CE) mode for paging transmission and associating a different repetition number with each paging occasion (PO). When extended discontinuous reception (eDRX) is configured for the user equipment, the method includes associating each paging occasion (PO) with a different repetition number.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: October 10, 2017
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Yanji Zhang, Jussi-Pekka Koskinen, Rapeepat Ratasuk, Haitao Li, Yuantao Zhang
  • Publication number: 20170201963
    Abstract: Systems, methods, apparatuses, and computer program products for narrow band internet of things (NB-IoT) paging optimization are provided. One method includes, when extended discontinuous reception (eDRX) is not configured for a user equipment (UE), applying a maximum repetition number of each coverage enhancement (CE) mode for paging transmission and associating a different repetition number with each paging occasion (PO). When extended discontinuous reception (eDRX) is configured for the user equipment, the method includes associating each paging occasion (PO) with a different repetition number.
    Type: Application
    Filed: January 6, 2017
    Publication date: July 13, 2017
    Inventors: Yanji ZHANG, Jussi-Pekka KOSKINEN, Rapeepat RATASUK, Haitao LI, Yuantao ZHANG
  • Publication number: 20170127437
    Abstract: The present invention discloses a user equipment that communicates with a base station in a first communication system, includes a transmitter configured to transmit to the base station an indication to report a co-existence problem experienced by the user equipment and assistance information for a 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; a receiver configured to receive from the base station configuration information that include information of a co-existence working mode allowed to be utilized by the user equipment and information that indicates whether the user equipment can deny an uplink transmission of the first communication system and a message; and a processor configured to configure the co-existence working mode according to the configuration information.
    Type: Application
    Filed: January 17, 2017
    Publication date: May 4, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Lei ZHANG, Xin WANG, Yuantao ZHANG
  • Publication number: 20170104558
    Abstract: A user equipment (UE), including: a receiver configured to receive downlink data transmitted by a base station via downlink component carriers including a secondary component carrier; and a circuit configured to select uplink resources from available resources for transmitting response signals obtained by decoding the received downlink data and select corresponding modulation symbols by using a mapping relation between a state of the response signals and the selected resources and the modulation symbols according to the state of the response signals; wherein the available resources include resources corresponding to a primary component carrier and resources allocated to the secondary component carrier by the base station; and, wherein the mapping relation includes cases in which the resource corresponding to the response signal that is NACK/DTX is not selected; where NACK represents Negative Acknowledgement, and DTX represents Discontinuous Transmission; and when the response signals are all DTX, no resource
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yuantao ZHANG, Yi ZHANG, Yuanrong LAN, Hua ZHOU, Jianming WU
  • Patent number: 9596644
    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: Grant
    Filed: September 3, 2012
    Date of Patent: March 14, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Yuantao Zhang, Zhi Zhang, Jianchi Zhu, Haipeng Lei, Kodo Shu
  • Patent number: 9591629
    Abstract: A power compensation method, base station and user equipment. The method includes: transmitting, by a base station, when an expanded UE-specific PDCCH is amplitude phase keying modulated, a first ratio of the EPRE of the expanded UE-specific downlink control channel to the EPRE of a DM-RS in a first time slot occupied by the expanded UE-specific PDCCH, so that the terminal equipment performs power compensation in decoding the received data transmitted by the base station according to the first ratio, thereby ensuring correct demodulation of the received data by the terminal equipment.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: March 7, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou
  • Patent number: 9572139
    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: Grant
    Filed: August 3, 2012
    Date of Patent: February 14, 2017
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Jianchi Zhu, Zhi Zhang, Haipeng Lei, Yuantao Zhang, Frank Frederiksen
  • Patent number: 9571261
    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: April 12, 2016
    Date of Patent: February 14, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Haibo Xu, Yuantao Zhang, Hua Zhou, Jianming Wu, Yoshiaki Ohta
  • Patent number: 9565569
    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: Grant
    Filed: December 28, 2015
    Date of Patent: February 7, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Lei Zhang, Xin Wang, Yuantao Zhang
  • Publication number: 20170033882
    Abstract: Code generating including generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
    Type: Application
    Filed: October 3, 2016
    Publication date: February 2, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yi WANG, Yuantao ZHANG, Hua ZHOU, Jianming WU
  • Patent number: 9538522
    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: November 16, 2015
    Date of Patent: January 3, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yuantao Zhang, Yi Zhang, Yuanrong Lan, Hua Zhou, Jianming Wu
  • Publication number: 20160345354
    Abstract: A method and apparatus for transmitting control signaling includes: transmitting indication information on a transmission location of control signaling by a base station to a mobile station configured as an open-loop MIMO transmission mode; transmitting the control signaling by the base station in a data region by using the open-loop MIMO transmission mode or a transmit diversity transmission mode if the location for transmitting the control signaling indicated by the information on a transmission location of control signaling is located at the data region. Whereby the number of mobile stations to be scheduled in a cell is increased and results in the scheduling information to be transmitted in a subframe increased, the control signaling of a mobile station configured as an open-loop MIMO transmission mode is placed in a data region for transmission, thereby increasing the number of UE scheduled, increasing the throughput of the system.
    Type: Application
    Filed: August 8, 2016
    Publication date: November 24, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Yuantao ZHANG, Yi WANG, Yi ZHANG, Hua ZHOU
  • Patent number: 9467981
    Abstract: A method and apparatus for transmitting control signaling includes: transmitting indication information on a transmission location of control signaling by a base station to a mobile station configured as an open-loop MIMO transmission mode; transmitting the control signaling by the base station in a data region by using the open-loop MIMO transmission mode or a transmit diversity transmission mode if the location for transmitting the control signaling indicated by the information on a transmission location of control signaling is located at the data region. Whereby the number of mobile stations to be scheduled in a cell is increased and results in the scheduling information to be transmitted in a subframe increased, the control signaling of a mobile station configured as an open-loop MIMO transmission mode is placed in a data region for transmission, thereby increasing the number of UE scheduled, increasing the throughput of the system.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: October 11, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yuantao Zhang, Yi Wang, Yi Zhang, Hua Zhou
  • Patent number: 9461767
    Abstract: A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: October 4, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 9456393
    Abstract: Embodiments of the present invention provide a method and apparatus for determining a starting symbol of a physical downlink shared channel; wherein, a Pico base station transmits information indicating a PDSCH starting symbol of the Pico base station to a Macro base station, the Macro base station transmits the information indicating a PDSCH starting symbol to a terminal, and the terminal determines the PDSCH starting symbol in accordance with the information indicating a PDSCH starting symbol. With the embodiments of the present invention, the terminal within a serving range of the Pico base station resulted from a high offset value will not incorrectly decode a PCFICH due to interference of the Macro base station, thereby making the terminal determine a demarcation symbol between a PDCCH and a PDSCH, further increasing the coverage of the Pico base station, and realizing load balancing of the Macro base station and Pico base station.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: September 27, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Haibo Xu, Yuantao Zhang, Yanling Lu, Weiwei Wang, Ningjuan Chang
  • Patent number: 9445398
    Abstract: A method for transmitting sounding reference symbol, a base station and user equipment. The method comprises: configuring, by a base station, user equipment of a CoMP transmission mode, with parameter configuration information for transmitting SRS, the parameter configuration information including a frequency comb of the SRS and one or more pieces of the following information: cyclic shift, root sequence information, power control information, and transmission duration information, of the SRS; and transmitting the parameter configuration information to the user equipment by the base station, such that the user equipment transmits the SRS to the base station according to the parameter configuration information. The method is simple and flexible, efficiently uses limited SRS resources, and solves the problem in the prior art.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: September 13, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou
  • Publication number: 20160248573
    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: Application
    Filed: April 12, 2016
    Publication date: August 25, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Haibo XU, Yuantao ZHANG, Hua ZHOU, Jianming WU, Yoshiaki OHTA
  • Publication number: 20160212731
    Abstract: This disclosure generally relates to mapping between uplink and downlink resources. The UE may obtain a resource index indicating a first time-frequency resource which is used for transmission of data. The UE may also obtain a first band index indicating a first frequency band at which the first time-frequency resource is located. Then, the UE may determine, based on the resource index and the first band index, a resource for transmission of an acknowledgement associated with the data. In this way, an effective and efficient mapping rule between the uplink and downlink resources may be achieved.
    Type: Application
    Filed: March 4, 2015
    Publication date: July 21, 2016
    Inventors: Yuantao Zhang, Haitao Li
  • Patent number: 9398589
    Abstract: A method for resource assignment, base station and terminal equipment. The method includes: determining resource block group sizes or numbers of resource block subsets to which a stand-alone carrier and a carrier segment correspond; and assigning a resource to terminal equipment according to the resource block group sizes or the numbers of the resource block subsets. With this method, waste of RBs in the resource assignment type 0 may be avoided on the one hand, and on the other hand, a solution for resource assignment of the resource assignment type 1 is provided.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: July 19, 2016
    Assignee: Fujitsu Limited
    Inventors: Haibo Xu, Yanling Lu, Yuantao Zhang, Yi Wang