Patents by Inventor Lei Wan

Lei Wan 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: 8279887
    Abstract: The present invention relates to a method and apparatus for selecting radio resources for transmission of data over a radio link to which at least two resource units have been allocated. At least one resource unit is selected out of the allocated resource units, wherein the selection is determined in dependence of the result of checking whether values of a quality measure of the allocated resource units fall within a certain range.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: October 2, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lei Wan, Magnus Almgren
  • Publication number: 20120224559
    Abstract: The present invention discloses a method and an apparatus for notification of emitted energy. The method includes: performing an emitted energy decrease on resource elements in a current cell that have a same time-frequency location as part or all of resource elements where a reference signal of a neighboring cell is located; obtaining an emitted energy parameter of an energy non-decreased resource element (NRE) in the current cell according to a decreased amount of emitted energy of an emitted energy decreased resource element (DRE); and notifying the emitted energy parameter of the NRE to a user equipment (UE). According to embodiments of the present invention, the waste of emitted energy may be avoided, the emitted energy of part of REs is increased, and further, the signal to interference plus noise ratio (SINR) and throughput of service data may be increased.
    Type: Application
    Filed: May 11, 2012
    Publication date: September 6, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xiaotao Ren, Lei Wan, Zhiyu Yan, Yajun Zhao, Xiaoan Fan
  • Patent number: 8260211
    Abstract: A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more Access Points (APs), where the relative frequency shift between reference signals sent by different APs is zero; and performing channel estimation according to the reference signals. Another method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more APs, where for a first AP and a second AP among the two or more APs, a specific time-frequency lattice in the downlink signals sent by the first AP includes no data signal, and the specific time-frequency lattice corresponds to a time-frequency lattice utilized by the second AP to send a reference signal; and performing channel estimation according to the reference signals.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: September 4, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Wan, Xingqing Cheng, Mingyu Zhou, Yajun Zhao
  • Publication number: 20120208577
    Abstract: A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving, by a User Equipment (UE), downlink signals sent by two or more Access Points (APs), wherein no common reference signal is comprised in any data channel symbol domain except a preset symbol domain in the downlink signals; and performing, by the UE, channel estimation according to the downlink signals. The technical solution disclosed herein eliminates the interference between the reference signal and the data signal, enables the UE to estimate the channel value between the UE and the cooperative APs accurately, and improves the UE performance.
    Type: Application
    Filed: April 24, 2012
    Publication date: August 16, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei WAN, Xingqing CHENG, Mingyu ZHOU, Yajun ZHAO
  • Publication number: 20120202017
    Abstract: Provided herein are block copolymer thin film structures and methods of fabrication. Aspects described herein include methods of directed self-assembly of block copolymers on patterns using solvent annealing, and the resulting thin films, structures, media or other compositions. According to various embodiments, solvent annealing is used direct the assembly of block copolymers on chemical patterns to achieve high degrees of pattern perfection, placement of features at the precision of the lithographic tool used to make the chemical pattern, improved dimensional control of features, improved line edge and line width roughness, and resolution enhancement by factors of two to four or greater.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 9, 2012
    Applicant: WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: Paul F. NEALEY, Lei WAN
  • Publication number: 20120188978
    Abstract: The present invention provides a method for sending and receiving control information, an apparatus and a communication system. The method for sending control information includes: setting respective control bits in a downlink control information (DCI) format to generate control information applied by a network side to a terminal, where the control bits include validity indication bits and transmission control bits, indication information indicating whether transmission control exercised by the network side on a transmission block is valid relative to the terminal is written into the validity indication bits, and the validity indication bits are located outside the transmission control bits; and sending the generated control information to the terminal. In the embodiments of the present invention improve efficiency of using an overhead required for transmitting the control information.
    Type: Application
    Filed: March 30, 2012
    Publication date: July 26, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Zhiyu Yan, Yang Li, Lei Wan, Sha Ma, Xiaotao Ren, Chaojun Li
  • Publication number: 20120190356
    Abstract: Embodiments of the present invention provide a method and an apparatus for performing channel measurement for a cell. The method includes: sending information about a location of a to-be-measured reference signal to a user equipment, where the location of the to-be-measured reference signal is a part of a location occupied by a reference signal of the cell; and receiving a channel measurement report of the cell. The channel measurement report is sent by the user equipment and is obtained after the user equipment performs channel measurement for the cell according to the information about the location of the to-be-measured reference signal.
    Type: Application
    Filed: March 29, 2012
    Publication date: July 26, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yajun Zhao, Qing Li, Xiaoan Fan, Lei Wan
  • Patent number: 8205127
    Abstract: The present invention relates to automatic repeat request (ARQ) in wireless communication systems wherein a coded message block is spread over a plurality of sub-carriers or components. According to the invention an equalizing HARQ method is introduced. The equalizing HARQ identifies (215) and retransmits (230) the most distorted parts of a received coded message block. In addition, the retransmitted parts can optionally be relocated (225) to components of higher quality, which ensures good retransmission quality for those badly distorted parts in the prior transmission. After a soft-bit combination in a receiving node, the final received codeword experience an equalized quality variation with low multi-state performance loss.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: June 19, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lei Wan, Jung-Fu Cheng
  • Publication number: 20120114761
    Abstract: A skincare stimulant having an effective dose of platelets and pharmaceutically acceptable solvents and/or excipients, wherein the effective dose refers to the presence of at least 1000 platelets in every milligram of skincare stimulant.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 10, 2012
    Applicant: Central Medical Technologies Inc.
    Inventors: Chih I LIN, Han-Lei Wan
  • Publication number: 20120107583
    Abstract: Patterned substrates templates are provided, as well as methods comprising a combination of lithography and self-assembly techniques. The patterned substrates may comprise first and second patterns.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Inventors: Shuaigang Xiao, XiaoMin Yang, Yuan Xu, Lei Wan
  • Publication number: 20120099547
    Abstract: Embodiments of the present invention disclose a method, an apparatus, and a system for processing a reference signal. The present invention relates to the field of radio communications technologies, and solves a technical problem that it is impossible to meet a requirement for measurement of downlink channels of multiple cells in a coordinated multipoint transmission/reception (CoMP) scenario in the prior art. According to the embodiments of the present invention, a reference signal is sent in a specified pilot position to a target user equipment (UE) where data puncturing is performed, in positions corresponding to the specified pilot position, with respect to data symbols simultaneously sent by an evolved NodeB (eNB) to which another cell in a CoMP set of the UE belongs, and the specified pilot position is orthogonally separated from a reference signal pilot position of the another cell in the CoMP set.
    Type: Application
    Filed: December 29, 2011
    Publication date: April 26, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Lei WAN, Qiang LI, Yajun ZHAO, Xingqing CHENG
  • Publication number: 20120087270
    Abstract: Embodiments of the present invention relates to an uplink synchronization method and apparatus, where the method includes: obtaining a timing advance of a second frequency point according to a timing advance of a first frequency point; and sending data at an uplink sending time corresponding to the timing advance of the second frequency point. According to embodiments of the present invention, the TA of the second frequency point can be obtained according to the TA of the first frequency point, and a RACH access process does not need to be performed at the second frequency point, which effectively reduces the network resources occupied by the RACH process, and shortens the produced delay, thereby improving the performance of the entire system.
    Type: Application
    Filed: October 24, 2011
    Publication date: April 12, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Lei Wan, Yongxia Lv, Yunzhe Hou
  • Publication number: 20120087903
    Abstract: A hair growth agent having an effective dose of a platelet dry powder and a pharmaceutically acceptable solvent and/or excipient, wherein the effective dose refers to the presence of at least 1,000 platelets in every milligram of the hair growth agent.
    Type: Application
    Filed: September 28, 2011
    Publication date: April 12, 2012
    Applicant: Central Medical Technologies Inc.
    Inventors: Chin I Lin, Han-Lei Wan
  • Patent number: 8134932
    Abstract: The present invention relates to methods and arrangements in a multi-antenna radio communication system, in particular to methods and arrangements for improved multiple HARQ transmission in such systems. While HARQ transmission schemes, as known in the art, only can consider the fact whether or not a transmission attempt has been successful the present invention provides a HARQ retransmission scheme that considers the reception quality for already performed transmissions of a same data packet when selecting a resource allocation for necessary re-transmissions. Resource allocation for retransmissions is based on a pre-defined metric indicating a quality of the reception of the previous transmission attempts. Such a metric can be derived from a quality measure derived in the receiver unit, e.g. a CQI or CSI-based value, or an appropriate measure of the mutual information, e.g. the accumulated conditional mutual information (ACMI).
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: March 13, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Skillermark, Lei Wan, Jingyi Liao
  • Publication number: 20120057484
    Abstract: The present invention provides a method includes: receiving a downlink channel quality indicator or an interference indicator, where the downlink channel quality indicator or the interference indicator is fed back by a UE; estimating a weak interference noise matrix of the UE according to the downlink channel quality indicator or the interference indicator, where the downlink channel quality indicator or the interference indicator is fed back by the UE; obtaining a time-frequency channel matrix of a serving cell and a time-frequency strong interference matrix of a strong interfering cell, and obtaining a time-frequency interference noise matrix of the UE according to the estimated weak interference noise matrix and the time-frequency strong interference matrix; and estimate downlink channel quality according to the time-frequency channel matrix and the time-frequency interference noise matrix.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 8, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Lei Wan, Qiang Li, Liang Xia, Jingyuan Sun, Jianguo Wang
  • Patent number: 8131228
    Abstract: In a radio network a determination is made whether to implement cyclical delay diversity (CDD) for a radio frequency connection involving a radio base station (26) and a wireless terminal (30). The determination whether to implement cyclical delay diversity (CDD) is made in accordance with interference distribution at the wireless terminal (30), as such interference distribution is measured or otherwise perceived. When a determination is made to implement the cyclical delay diversity for the connection, plural transmit antennas (38) of the radio base station (26) are employed to implement the cyclical delay diversity for the connection. One or more indications of the interference distribution may be received and used to make the determination. The indication(s) of interference distribution can take the form of information received from the wireless terminal, and/or the form of frequency reuse plan information for interfering cells.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: March 6, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Jingyi Liao, Lei Wan
  • Publication number: 20120044902
    Abstract: The present invention discloses a method and an apparatus for processing data sending and a method and an apparatus for processing data receiving, wherein, the method for processing data sending includes: allocating the number of spatial transmission layers and a pilot resource for transmission at each spatial transmission layer; generating pilot resource information according to the number of spatial transmission layers and the pilot resource for transmission at each spatial transmission layer; and sending the pilot resource information to user equipment (UE). According to the embodiments of the present invention, the UE is enabled to determine a specific pilot resource to be used so as to effectively distinguish between user channels, obtain a correct channel estimation value, improve channel estimation performance, and thus, obtain correct service data.
    Type: Application
    Filed: October 27, 2011
    Publication date: February 23, 2012
    Inventors: Weijun Sun, Yonxing Zhou, Yang Li, Bingyu Qu, Lei Wan, Qiang Wu
  • Publication number: 20120039297
    Abstract: A method and an apparatus for handling data sending and receiving are disclosed by the present invention, where the method for handling data sending includes: allocating the number of space transmission layers and pilot frequency resource for transmission at each transmission layer (101); generating pilot frequency resource information according to the number of space transmission layers and the pilot frequency resource for transmission at each transmission layer (102); and sending the pilot frequency resource information to a UE (103). The embodiments of the present invention can enable the UE to determine the specifically used pilot frequency resources to effectively distinguish the specific user channels, obtain correct channel estimation values, improve the channel estimation performance, and obtain correct service data.
    Type: Application
    Filed: October 28, 2011
    Publication date: February 16, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Weijun SUN, Bingyu QU, Yang LI, Lei WAN, Qiang WU
  • Publication number: 20120040622
    Abstract: A method for reporting channel state information includes: obtaining channel state information of a described object; and feeding back the obtained channel state information to a base station in a comb manner. A method for channel estimation includes: receiving channel state information that is reported by a terminal in a comb manner; and determining, according to the channel state information that is reported in the comb manner, channel state information corresponding to a described object that does not report channel state information.
    Type: Application
    Filed: October 28, 2011
    Publication date: February 16, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xiaotao Ren, Lei Wan, Zhiyu Yan
  • Publication number: 20120039260
    Abstract: A method, a system, and equipment for information processing are provided. The method includes receiving information sent by a source eNodeB of UE, where the information includes processing status information and data information which are obtained after the source eNodeB processes data transmitted by the UE, or data information in at least two user plane protocol stacks of the source eNodeB, or data information in user plane protocol stacks except PDCP in the source eNodeB; and correspondingly, transmitting data with the UE according to the processing status information and data information, or the data information in the at least two user plane protocol stacks, or the data information in user plane protocol stacks except PDCP.
    Type: Application
    Filed: October 27, 2011
    Publication date: February 16, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Weiwei SONG, Yinghui YU, Lei WAN, Xin XIONG, Yuan XIA, Xiaorui ZHENG, Xiaotao REN, Jingdong PENG