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).

  • 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
  • Publication number: 20120039182
    Abstract: A method for processing an uplink signal, a BS, and a UE are provided. The method includes: receiving an uplink signal that is generated according to CP configuration information and is sent by a UE, where the CP configuration information is used to identify a mapping relationship between a TTI and a CP type that is used by the uplink signal; and determining, according to the CP configuration information, a CP type corresponding to a TTI of receiving the uplink signal, and processing the uplink signal according to the determined CP type. The UE can use different CP types in the case of different TTIs. Therefore, the technical solutions provided in embodiments of the present invention provide support for solving the uplink delay without introducing too large overhead.
    Type: Application
    Filed: October 28, 2011
    Publication date: February 16, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mingyu ZHOU, Lei WAN, Weiwei SONG
  • Patent number: 8112105
    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 does not include 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: September 9, 2011
    Date of Patent: February 7, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Wan, Xingqin Cheng, Mingyu Zhou, Yajun Zhao
  • Publication number: 20120002660
    Abstract: A method for transmitting a signal and a communications apparatus are provided. The method includes: obtaining a signal transmission mode, where the signal transmission mode indicates that an uplink signal is transmitted in a multiplexing mode; and transmitting the uplink signal on an uplink band and a downlink band in the multiplexing mode according to the obtained signal transmission mode. The communications apparatus includes: a first obtaining unit, configured to obtain a signal transmission mode, where the signal transmission mode indicates that an uplink signals is transmitted in a multiplexing mode; and a transmitting unit, configured to transmit the uplink signal on an uplink band and a downlink band in the multiplexing mode according to the obtained signal transmission mode. The technical solutions of embodiments of the present invention can reduce signaling overheads of the system and improve spectrum efficiency of the system when obtaining channel state information (CSI).
    Type: Application
    Filed: September 16, 2011
    Publication date: January 5, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei WAN, Xiaotao Ren, Yongxia LV, Yunzhe Hou
  • Publication number: 20120004007
    Abstract: A method for power control includes: if a downlink serving Access Point (AP) of a User Equipment (UE) is different from an uplink serving AP of the UE, sending, by a base station, downlink signaling to the UE so that the UE adjusts uplink transmitting power according to the downlink signaling. In addition, the present invention discloses an apparatus and a network device for power control.
    Type: Application
    Filed: September 16, 2011
    Publication date: January 5, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mingyu Zhou, Lei Wan, Yajun Zhao, Xiaotao Ren
  • Publication number: 20120002662
    Abstract: The present invention discloses a method and an apparatus for coexistence of multiple operating entity systems, where the method includes: setting part or all of bandwidths of an operating entity in uplink timeslots of a downlink carrier frequency interference region to be in an idle state. By using the present invention, the uplink timeslots of the operating entity in the downlink carrier frequency interference region are set to be in an idle state and do not transmit an uplink transmit signal any longer, which prevents a downlink transmit signal of another operating entity from interfering with an uplink transmit signal of the operating entity.
    Type: Application
    Filed: March 11, 2009
    Publication date: January 5, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Lei Wan, Yunzhe Hou, Xiaotao Ren, Yongxia Lv, Yang Li
  • Publication number: 20110317597
    Abstract: Embodiments of the present invention disclose a method, an apparatus, and a system for identifying different frame structures to ensure backward compatibility of an LTE-advanced (LTE-A) network. The method for identifying different frame structures includes: receiving a radio frame on a frequency division duplex (FDD) downlink carrier, where the radio frame includes an identifier of a frame structure; and identifying the frame structure according to the identifier of the frame structure included in the radio frame. Embodiments of the present invention also disclose a user equipment (UE), an evolved NodeB (eNB), and a system for identifying different frame structures. Through the technical solutions provided by embodiments of the present invention, LTE-A users can identify the frame structure carried on the FDD downlink carrier when accessing the network initially, but LTE users are unaware of the change of the frame structure.
    Type: Application
    Filed: September 9, 2011
    Publication date: December 29, 2011
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei WAN, Yongxia LV
  • Publication number: 20110312356
    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 does not include 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: Application
    Filed: September 9, 2011
    Publication date: December 22, 2011
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei WAN, Xingqing CHENG, Mingyu ZHOU, Yajun ZHAO
  • Publication number: 20110292906
    Abstract: A method, an apparatus, and a system for Coordinated Multi-Point (CoMP) transmission are provided, which can effectively improve the transmission reliability over the control channel and flexibility of the application. The method includes: allocating different resources to a control channel carrying coordination information and a data channel, and performing CoMP transmission over the control channel and the data channel by using the allocated different resources. The technical solutions provided in the present invention are applicable to an Orthogonal Frequency Division Multiplexing (OFDM) system, a Code Division Multiple Access (CDMA) system, a Time Division Multiple Access (TDMA) system, or other mobile communication systems.
    Type: Application
    Filed: August 10, 2011
    Publication date: December 1, 2011
    Inventors: Xiaotao REN, Bingyu Qu, Lei Wan, Xingqing Cheng
  • Publication number: 20110268077
    Abstract: A downlink transmission method in a Coordinated Multi-Point (COMP) transmission system, a network device, and a wireless system are disclosed. The method includes: determining a downlink physical resource and a downlink mapping rule corresponding to a physical downlink channel and/or a reference signal negotiated by cooperating cells; and mapping the physical downlink channel and/or the reference signal to the downlink physical resource according to the downlink mapping rule, and sending the physical downlink channel and/or the reference signal to a User Equipment (UE). According to the method, effective coverage can be improved and the problem of mutual interference between cells can be prevented.
    Type: Application
    Filed: July 11, 2011
    Publication date: November 3, 2011
    Inventors: Lei WAN, Yajuii Zhao, Xingqing Cheng, Xiaotao Ren
  • Publication number: 20110246177
    Abstract: A syntactic analysis and hierarchical phrase model based machine translation system and method are provided. The machine translation system includes a word alignment module, a phrase extraction module, a gender syntactic annotation module, a syntactic based noncontiguous phrase abstract module, a noncontiguous phrase based translation module and an evaluation module. The machine translation system and method performs syntactic analysis based on a common contiguous phrase based machine translation model, and extracts a syntactic based noncontiguous phrase rule set from a bilingual aligned text, so as to address and issue of noncontiguous fixed custom in context of a whole sentence, and to comply with syntactic features of a language, translation is performed based on the noncontiguous phrase rule set and the phrase aligned table, and the translation results are evaluated based on the evaluation model, thereby improving the translation result.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 6, 2011
    Applicants: SAMSUNG ELECTRONICS CO. LTD., SAMSUNG ELECTRONICS (CHINA) R &D CENTER
    Inventors: Liang HE, Zhangliang XIONG, Lei WAN
  • Publication number: 20110235603
    Abstract: A method, a network device, and a system for determining resource mapping in CoMP transmission are disclosed. The method includes: the cooperative cells that perform CoMP transmission for a UE negotiate a mapping rule used by the cooperative cells when the status of the CoMP transmission of the UE changes, where the mapping rule includes the number of and position of OFDM symbols allocated to a PDCCH domain and/or a data channel domain; and the negotiated mapping rule is notified to the UE. In this embodiment, before the downlink signals are transmitted, the mapping rule used by each cooperative cell for CoMP transmission is negotiated between the cooperative cells, and therefore, the UE can accurately receive the signal sent by multiple cooperative cells and the performance of CoMP transmission in the system is improved.
    Type: Application
    Filed: May 20, 2011
    Publication date: September 29, 2011
    Inventors: Xingqing Cheng, Lei Wan, Mingyu Zhou, Yajun Zhao, Xiaotao Ren
  • Publication number: 20110212738
    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: Application
    Filed: May 12, 2011
    Publication date: September 1, 2011
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei WAN, Xingqing CHENG, Mingyu ZHOU, Yajun ZHAO
  • Publication number: 20110188549
    Abstract: In a network comprising a signal forwarding node, a pre-coding code book generating method, wherein the method comprises: generating a pre-coding code book, wherein the pre-coding code book comprises at least one pre-coding code word corresponding to the signal forwarding node, and the pre-coding code word comprises one or more antenna beamforming weights; and communicating the pre-coding code book to a user equipment.
    Type: Application
    Filed: October 1, 2008
    Publication date: August 4, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Lei Wan, Pål Frenger, Qingyu Miao
  • Publication number: 20110182200
    Abstract: A method, device and user equipment (UE) for transmitting multi-cell scheduling information is provided. When at least two cells are serving the UE, the method for transmitting multi-cell scheduling information includes the following steps: determining a main cell of the UE from the at least two cells; transmitting, in the main cell, the scheduling information of the main cell and an auxiliary cell which are serving the UE.
    Type: Application
    Filed: March 21, 2011
    Publication date: July 28, 2011
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei Wan, Sha Ma, Mingyu Zhou, Jingyuan Sun, Chengyu Wang, Di Zhu, Yuan Xia, Xiaotao Ren, Shujun Dang
  • Publication number: 20110177823
    Abstract: The present invention relates to methods and arrangements that enable easy integration of on/off repeaters in a radio access network and a minimized signaling for the UE repeater selection. This is achieved by a solution where the RBSs are working in a pre-coding mode and where the repeaters are measuring the downlink reference signals, selecting pre-coding matrices and feeding the index of selection back (i.e. the PMI) to the RBS, in analogy with what a UE does. This allows the RBS to distinguish the UE repeater selection, without introducing any extra uplink report or interaction between UEs and repeaters, by comparing the index from the UE with the indices from different repeaters.
    Type: Application
    Filed: September 5, 2008
    Publication date: July 21, 2011
    Inventors: Qingyu Miao, Lei Wan
  • Publication number: 20110170449
    Abstract: A method is performed by a device in a wireless network. The method includes receiving a transmission that includes a wideband channel quality indicator, determining a received signal power estimate for each frequency band of a frequency domain, and determining an average interference-plus-noise based on the wideband channel quality indicator and the received signal power estimate. The method further includes determining a signal-to-interference-plus-noise ratio estimate for each frequency band based on the average interference-plus-noise and the received signal power estimate, and performing a communicative operation based on the signal-to-interference-plus-noise ratio estimate.
    Type: Application
    Filed: September 2, 2008
    Publication date: July 14, 2011
    Applicant: Telefonaktiebolaget LM Ericsson
    Inventors: Yu Qian, David Astely, Yang Hu, Lei Wan
  • Patent number: 7961795
    Abstract: The channel estimation for a current data block is based on a previous data block, where the two data blocks are based on common information. Data symbol hypotheses of the previous data block can be forwarded to a channel estimator and used as known reference symbols when estimating the channel response for the current block. Alternatively, a combination of the data symbol hypotheses and preliminary data symbol estimates of the current block are used as reference symbols in a refined channel estimation for the current block. Data bit hypotheses of the previous block can also be input as a priori data in a preliminary demodulation of the current block. The demodulator output is used as reference data in a refined channel estimation for the current block. The technology is well-adapted for use in connection with Hybrid ARQ.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: June 14, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Zesong Fei, Lei Wan, Jingming Kuang
  • Publication number: 20110096693
    Abstract: A method in a terminal for providing an ACK/NAK message to a base station is provided. The terminal counts the number of assigned downlink subframes detected from the base station resulting in k. The terminal then establishes whether each of a number of transport blocks comprised in the counted k downlink subframes is correctly received or not. In the case when each one of the transport blocks, comprised in the k downlink subframes is estimated as correctly received the terminal provides to the base station an encoded ACK message for the k subframes, which comprises k, the number of subframes.
    Type: Application
    Filed: December 9, 2008
    Publication date: April 28, 2011
    Inventors: David Astely, Yang Hu, Daniel Larsson, Lei Wan
  • Patent number: 7933350
    Abstract: Methods and apparatus are disclosed for scheduling sub-carriers in an Orthogonal Frequency Division Multiplexing (OFDM) communication system. In an exemplary method, channel quality metric values for each of a plurality of sub-channels are determined, in view of a selected mobile terminal. For each of two or more threshold levels for the channel quality metric, sub-carrier groups composed of sub-carriers corresponding to sub-channels having channel quality metric values superior to the threshold level are identified, and an estimated data throughput is calculated for each of the identified sub-carrier groups. One or more of the identified sub-carrier groups is allocated to the selected mobile terminal according to the estimated data throughputs.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: April 26, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Yin Liu, Lei Wan