Patents by Inventor Xudong Zhu

Xudong Zhu 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).

  • Publication number: 20140171143
    Abstract: In a heterogeneous network with a shared cell-ID, the current power control mechanism only configures common power control parameters for all UE in a macro cell, and this doesn't match the receiving power of a wireless access point associated actually, and may lead to serious interferences. The invention provides a method used for uplink power control in a UE of a heterogeneous network with a shared cell-ID, wherein, a wireless access point informs the UE of power control parameters which is related to an associated wireless access point of the UE in the heterogeneous networks, the UE determines a uplink power according to the power control parameters, and transmits uplink data based on the determined uplink power. The invention may configure uplink power for the UEs associated to different wireless access points in a heterogeneous network with a shared cell-ID, to make them have the power control parameters matching with their wireless access points.
    Type: Application
    Filed: July 23, 2012
    Publication date: June 19, 2014
    Applicant: ALCATEL LUCENT
    Inventors: Jin Liu, Xudong Zhu, Matthew Baker, Yubo Yang
  • Publication number: 20130148584
    Abstract: The present invention provides a method and apparatus for use in non-adaptive retransmission. The method comprises: configuring an uplink UL demodulation reference signal DM-RS for retransmission in response to a retransmission request. In one embodiment, the demodulation reference signal DM-RS is configured to be the same as a demodulation reference signal for an initial transmission. In another embodiment, the demodulation reference signal DM-RS is configured with respect to the number of layer(s) for retransmission according to predetermined rules for the initial transmission.
    Type: Application
    Filed: July 29, 2011
    Publication date: June 13, 2013
    Applicant: ALCATEL LUCENT
    Inventors: Xudong Zhu, Jin Liu
  • Publication number: 20130142163
    Abstract: Embodiments of the present invention disclose triggering methods and apparatuses of aperiodic channel state information CSI and an aperiodic sounding reference signal SRS for a carrier aggregation system. The method comprises: (1) pre-assigning a corresponding relationship between bits of the CSI request field in an uplink grant and multiple downlink component carriers DL CCs of user equipment, wherein the number of bits of the CSI request field is greater than 1 and less than the maximum allowed number of DL CCs in the system; (2) determining the DL CC for which aperiodic CSI reporting is to be triggered; and (3) mapping the CSI request field in the uplink grant according to the pre-assigned corresponding relationship to mark the value of the bit corresponding to the determined DL CC as “trigger”.
    Type: Application
    Filed: March 18, 2011
    Publication date: June 6, 2013
    Applicant: ALCATEL LUCENT
    Inventors: Jin Liu, Xudong Zhu
  • Patent number: 8332513
    Abstract: The present invention discloses a method and device for detecting connectivity termination in an IPv6 access network based on a DHCP service model. The method for detecting connectivity termination according to the invention comprises the steps of: creating an entry of the subscriber connectivity cache list corresponding to the subscriber terminal in the access node when the IPv6 connectivity between the subscriber terminal and the access node is established successfully; querying the entry of the neighbor cache list corresponding to the subscriber terminal based on the polling time set in the entry of the subscriber connectivity cache list; deciding whether the connectivity of the subscriber terminal is normal based on the entry information corresponding to the subscriber terminal of the subscriber connectivity cache list and neighbor cache list; and performing termination processing on the connectivity of the subscriber terminal logging off abnormally.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: December 11, 2012
    Assignee: Alcatel Lucent
    Inventors: HaiBo Wen, RenXiang Yan, YingLan Jiang, KeYao Zhu, XuDong Zhu, FanXiang Bin, Wei Jiang
  • Publication number: 20120300724
    Abstract: The invention relates to a method and apparatus for reducing an overhead of control signaling. The method of reducing an overhead of control signaling comprises the steps of: generating one of a plurality of downlink control information formats which is used for scheduling a physical uplink shared channel, and transmitting the generated one of the plurality of downlink control information formats which is used for scheduling the physical uplink shared channel, wherein each of the plurality of downlink control information formats includes a minimum payload required for a specific scenario. With the invention, the signaling overhead is minimized.
    Type: Application
    Filed: January 12, 2010
    Publication date: November 29, 2012
    Inventors: Jin Liu, Xudong Zhu, Mingli You, Fanglei Sun
  • Publication number: 20120014315
    Abstract: The invention provides methods for implementing synchronous uplink HARQ process in multiple BS coordinated receiving network. According to one embodiment, for synchronous uplink HARQ process with a relatively short response time limit, the service BS provides a receiving response in accordance with the response time limit, and formally instructs the terminal to retransmit or start a new transmission after the merging is completed. According to another embodiment, the synchronous uplink HARQ process has a response time limit matching the delay of multiple BS Coordinated network, and thus the service BS can transmit receiving response or control signaling on PDCCH after the mergence is completed. Thereby, the synchronous uplink HARQ process in multiple BS Coordinated networks of LTE and LTEA can be implemented.
    Type: Application
    Filed: March 15, 2010
    Publication date: January 19, 2012
    Applicant: AL CATEL LUCENT
    Inventors: Tao Yang, Mingli You, Xudong Zhu
  • Publication number: 20120002611
    Abstract: The present invention provides an uplink progressive multi-point coordinated MIMO processing scheme.
    Type: Application
    Filed: March 15, 2010
    Publication date: January 5, 2012
    Inventors: Mingli You, Xudong Zhu, Tao Yang
  • Publication number: 20110232247
    Abstract: The invention relates to a method for simplifying hybrid rice seed production procedure and improving the working efficiency of seed production. The method comprises the following steps: (1) breeding small grain CMS or GMS line and corresponding hybrid rice having characteristics of rice (Oryza sativa) ZH-sg (Zhonghua 11 small grain mutant) with the accession number of CGMCC No. 2741; (2) hybridizing the small grain CMS line with large grain or normal grain restorer line hybrid rice for seed producing; (3) carrying out mechanized seed production of mixing sowing and mixing harvesting by utilizing small grain CMS line hybrid rice; (4) seed cleaning and separation after mechanical harvest. The invention can save a large amount of seed production field, reduce the investment of labor force in seed production, simplify the operation procedure and reduce mechanical admixture, storage and transportation cost and buying cost of hybrid rice seeds for rice farmers.
    Type: Application
    Filed: June 18, 2009
    Publication date: September 29, 2011
    Applicant: CHINA NATIONAL RICE RESEARCH INSTITUTE
    Inventors: Xudong Zhu, Yuexing Wang, Shen Ni, Hongqi Chen
  • Publication number: 20110134853
    Abstract: Disclosed is a method for allocating mobile user resource, which comprises the steps of: randomly generating a resource allocation mapping sequence by a base station based on a hopping scheme, which has a variable hopping distance; and allocating communication resource by the base station to each UE within a cell, where the base station is present, based on the generated resource allocation mapping sequence. Since the hopping scheme is generated randomly, the resource allocation scheme according to the present invention may randomize a resource allocation procedure among different cells, thereby randomizing the inter-cell interference and decreasing dramatic changes of interference due to the user's movement.
    Type: Application
    Filed: August 10, 2007
    Publication date: June 9, 2011
    Inventors: Xudong Zhu, Mingli You
  • Publication number: 20110107174
    Abstract: The present invention provides a MIMO transmitter and a MIMO receiver, used in SC-FDMA system, which make interchanging for multiple paths of modulated symbol sequences in order to acquire diversity gain while ensure PAPR of single antenna. MIMO transmitter interchanges partial symbols of at least one error-correction codeword of at least one of the multipath modulated symbol sequences and partial symbols of at least one error-correction codeword of at least one of the other of the multipath modulated symbol sequences so as to obtain interchanged multipath modulated symbol sequences; MIMO receiver executes inverse-interchanging which is inverse to the interchanging in a MIMO transmitter for multipath interchanged signals received from multiple transmitting antennas. The present invention could reduce the BLER of the entire SC-FDMA system, and obtain diversity gain while ensure PAPR of single antenna.
    Type: Application
    Filed: July 18, 2008
    Publication date: May 5, 2011
    Inventors: Jin Liu, Mingli You, Xudong Zhu
  • Patent number: 7241139
    Abstract: This invention relates to a casting sand heating apparatus. The purpose of this invention is to provide a casting sand heating apparatus which can heat sand up to 300° C. or higher with high energy efficiency, lower capital investment and lower operating costs. This apparatus is comprised of a furnace body, sand inlet, smoke discharge and dust removing port, hearth and sand outlet. The sand inlet is arranged at the top of the furnace body, the combustion mouth is arranged in the lower part of the furnace body. Additionally, the heat exchange apparatus is arranged in the middle part of the furnace body. This invention can be used for the heating and baking of fresh and used casting sand.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: July 10, 2007
    Inventor: Xudong Zhu
  • Publication number: 20060099542
    Abstract: This invention relates to a casting sand heating apparatus. The purpose of this invention is to provide a casting sand heating apparatus which can heat sand up to 300° C. or higher with high energy efficiency, lower capital investment and lower operating costs. This apparatus is comprised of a furnace body, sand inlet, smoke discharge and dust removing port, hearth and sand outlet. The sand inlet is arranged at the top of the furnace body, the combustion mouth is arranged in the lower part of the furnace body. Additionally, the heat exchange apparatus is arranged in the middle part of the furnace body. This invention can be used for the heating and baking of fresh and used casting sand.
    Type: Application
    Filed: January 9, 2004
    Publication date: May 11, 2006
    Inventor: Xudong Zhu
  • Publication number: 20060080728
    Abstract: The present invention provides a method for network service selection and authentication in an IPv6 access network, a scheme for stateless auto-configuration and devices thereof. A NSP Information option containing the IPv6 address of a NSP edge router and a NSP name is defined in RA messages. A NSSA Information option is defined in RS option fields. The present invention enables IPv6 stateless auto-configuration in an access network. The new NSP Information option, the way of “one time authentication per subscriber network per NSP” and the use of IPv6 routing header promote the efficiency of IPv6 stateless auto-configuration and reduce the NSP selection and authentication traffic. The present invention provides an efficient solution for network service selection and authentication without introducing any other message exchange between terminals and access nodes.
    Type: Application
    Filed: September 15, 2005
    Publication date: April 13, 2006
    Inventors: HaiBo Wen, RenXiang Yan, KeYao Zhu, YingLan Jiang, XuDong Zhu, FanXiang Bin, QingShan Zhang
  • Publication number: 20060067332
    Abstract: The present invention discloses a method and device for detecting connectivity termination in an IPv6 access network based on a DHCP service model. The method for detecting connectivity termination according to the invention comprises the steps of: creating an entry of the subscriber connectivity cache list corresponding to the subscriber terminal in the access node when the IPv6 connectivity between the subscriber terminal and the access node is established successfully; querying the entry of the neighbor cache list corresponding to the subscriber terminal based on the polling time set in the entry of the subscriber connectivity cache list; deciding whether the connectivity of the subscriber terminal is normal based on the entry information corresponding to the subscriber terminal of the subscriber connectivity cache list and neighbor cache list; and performing termination processing on the connectivity of the subscriber terminal logging off abnormally.
    Type: Application
    Filed: September 12, 2005
    Publication date: March 30, 2006
    Inventors: HaiBo Wen, RenXiang Yan, YingLan Jiang, KeYao Zhu, XuDong Zhu, FanXiang Bin, Wei Jiang