Patents by Inventor Kin Nang Lau

Kin Nang Lau 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: 10298305
    Abstract: Embodiments of the present invention provide a channel state information (CSI) feedback method and apparatus, user equipment, and a base station. The method, performed by a user equipment device, includes: pre-synchronizing, between the user equipment device and a base station, a basis matrix that includes sparsity of CSI in a frequency domain and a space domain; receiving pilot information from the base station; determining, according to the pilot information, a CSI information matrix that includes information about the frequency domain and the space domain of CSI; determining the data by using the CSI information matrix; and feeding back the data to the base station, so that the base station restores the corresponding CSI information from the data by using the basis matrix.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: May 21, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kin Nang Lau, Xiongbin Rao, Rongdao Yu
  • Patent number: 10164730
    Abstract: Embodiments of the present invention provide a signal processing method and a base station. By using respective sparse characteristics of a user signal and an interference signal, the user signal and the interference signal are iteratively recovered, that is, the interference signal is first fastened, and the user signal is recovered; and then the user signal is fastened, and the interference signal is recovered. In this way, an iteration cycle is repeated until the recovered user signal and the recovered interference signal meet a preset condition, thereby effectively improving interference cancellation performance, achieving relatively good interference suppression.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: December 25, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kin Nang Lau, An Liu, Xiangming Kong
  • Patent number: 10158405
    Abstract: Interference alignment for a multiple-input multiple-output communications network with partial connectivity is provided. A method is provided that includes determining assignments for data streams transmitted in the multiple-input multiple-output communications network. The method also includes suppressing inter-cell interference and suppressing intra-cell interference. Also provided is inter-cell/intra-cell decomposition and exploitation of partial connectivity in a multiple-input multiple-output communications network. The multiple-input multiple-output communications network can comprise three or more cells.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: December 18, 2018
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Liangzhong Ruan, Vincent Kin Nang Lau, Xiongbin Rao
  • Patent number: 10129356
    Abstract: Cooperative physical layer caching systems for base stations are described herein. Base stations include cache memories that store portions of content. Base stations receive requests for content files from mobile devices. Cooperative physical layer caching systems can determine contents of the cache memories and can coordinate physical transmissions of the content files based on the contents of the cache memories.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: November 13, 2018
    Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Vincent Kin Nang Lau, An Liu
  • Publication number: 20180278311
    Abstract: A communication beam determining method and a corresponding apparatus are disclosed. The method includes respectively sending, by a network side device, downlink sounding signals by using M beams with a first width, where main lobe directions of any two of the M beams are different; receiving, by the network side device, sounding results returned by user equipment (UE), and determining N beams with a second width based on the sounding results, where the second width is less than the first width, a coverage area of a set of the N beams is smaller than a coverage area of a set of the M beams, and M and N are integers and not less than 2; and respectively sending, by the network side device, downlink scanning signals by using the N beams, and determining, based on scanning results returned by the UE, a first beam for data transmission with the UE.
    Type: Application
    Filed: May 29, 2018
    Publication date: September 27, 2018
    Inventors: Jing QIU, Kin Nang LAU, Xiaona WANG
  • Patent number: 10057799
    Abstract: The present invention provides a channel measurement method, a channel measurement apparatus, user equipment. A wireless communications system includes a channel measurement apparatus and at least two user equipments. The method includes: sending, by the channel measurement apparatus, an antenna domain training sequence to the at least two user equipments; receiving, by the channel measurement apparatus, channel response measurement sequences sent by the at least two user equipments, where the channel response measurement sequences are sequences that are obtained after the antenna domain training sequence passes through channels and that are received by the at least two user equipments; and performing, by the channel measurement apparatus, joint processing on the received channel response measurement sequences of the at least two user equipments to obtain downlink channel state information CSIT.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: August 21, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiongbin Rao, Kin Nang Lau, Xiangming Kong
  • Patent number: 9882688
    Abstract: The present invention relates to the field of communications technologies, and discloses a method, an apparatus, and a system for suppressing interference in a massive multiple-input multiple-output system, which overcome a disadvantage of sensitivity to a backhaul delay during an inter-cell interference cancellation process in an existing massive multiple-input multiple-output system. A specific embodiment of the present invention includes: obtaining channel correlation matrixes of all links, and further calculating a combined outer precoder set according to the channel correlation matrixes, where each combined outer precoder includes at least one outer precoder, and the outer precoder is a semi-unitary matrix and is not sensitive to a backhaul delay. Technical solutions of the present invention are mainly applied to a process of processing interference in a massive multiple-input multiple-output system.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: January 30, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kin Nang Lau, An Liu, Rongdao Yu
  • Patent number: 9806774
    Abstract: Channel state information (CSI) is reduced for a multi input multi output (MIMO) channel, in which feeding back a part of the CSI matrix is sufficient to align interference in a MIMO network. A feedback dimension quantifies a cost of the CSI feedback of the interference in the MIMO network. A feedback profile is determined that achieves a tradeoff between degrees of freedom, antenna resources and the cost of the feedback. The feedback profile parameterizes a feedback function, which determines how the CSI matrices are fed back to the transmitter. The precoders of the network are adaptive to only the partial CSI knowledge at the transmitter.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: October 31, 2017
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Vincent Kin Nang Lau, Xiongbin Rao, Liangzhong Ruan
  • Patent number: 9793967
    Abstract: Signal interference associated with multi-user multiple-input multiple-output (MIMO) full-duplex wireless communication systems is reduced. In an example, first streams are received by a MIMO base station from uplink user devices based on a first availability of channel matrices and second streams are transmitted to downlink user devices based on a second availability of the channel matrices. A weighted sum of a first data rate for a first linear transceiver matrix and a second data rate of a second linear transceiver matrix is maximized based on the channel matrices, the first streams, and the second streams. The base station generates a first linear transceiver vector used in transmission of the first streams to the base station from the uplink user devices and a second linear transceiver vector used in transmission of the second streams from the base station to the downlink user devices.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: October 17, 2017
    Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Ross David Murch, Vincent Kin Nang Lau, Shenghong Li
  • Patent number: 9755711
    Abstract: A subset of mobile device candidates in a multi-input multi-output (MIMO) channel of network devices is selected for having a feedback priority among a set of mobile device candidates. The selection is based on a set of queue state information of a plurality of mobile device queues for transmitter and receiver devices of the MIMO channel in a multi-user MIMO network. A portion of the subset of mobile device candidates can be selected by a scheduling component of the system. Communications on the MIMO channels can be scheduled to the portion of the subset of mobile device candidates based on the feedback comprising channel state information and on the queue state information of the plurality of mobile device queues.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: September 5, 2017
    Inventors: Vincent Kin Nang Lau, Junting Chen
  • Patent number: 9668146
    Abstract: A wireless coverage characterization platform uses an autonomous vehicle or robot, such as an unmanned aerial vehicle or other small robot, to autonomously collect key wireless coverage parameters for an indoor environment. One or more vehicles or robots are equipped with integrated simultaneous localization and mapping sensors as well as wireless signal measurement sensors. As a vehicle traverses the indoor environment, on-board processing components process the sensor measurement data to simultaneously build an indoor map of the environment and to learn the wireless coverage characteristics of the environment incrementally. The vehicle's navigation system guides the vehicle through the environment based on the sensor measurements and the learned indoor map until a complete map of the wireless signal strength at all locations throughout the environment is obtained.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 30, 2017
    Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventor: Vincent Kin Nang Lau
  • Publication number: 20170048735
    Abstract: The present invention provides a channel measurement method, a channel measurement apparatus, user equipment. A wireless communications system includes a channel measurement apparatus and at least two user equipments. The method includes: sending, by the channel measurement apparatus, an antenna domain training sequence to the at least two user equipments; receiving, by the channel measurement apparatus, channel response measurement sequences sent by the at least two user equipments, where the channel response measurement sequences are sequences that are obtained after the antenna domain training sequence passes through channels and that are received by the at least two user equipments; and performing, by the channel measurement apparatus, joint processing on the received channel response measurement sequences of the at least two user equipments to obtain downlink channel state information CSIT.
    Type: Application
    Filed: October 28, 2016
    Publication date: February 16, 2017
    Inventors: Xiongbin Rao, Kin Nang Lau, Xiangming Kong
  • Patent number: 9560694
    Abstract: Cooperative caching systems incorporating Plug-and-Play base stations are described herein. Plug-and-Play base stations with large caching capacities are employed in a wireless network to perform cooperative transmission with macro base stations. Each Plug-and-Play base station can either have wireless backhaul or a low-cost wired backhaul connection to the macro base stations. Cooperative caching systems can direct traffic between the Plug-and-Play base stations and the macro base stations.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: January 31, 2017
    Assignee: The Hong Kong University of Science and Technology
    Inventor: Vincent Kin Nang Lau
  • Publication number: 20150312774
    Abstract: A wireless coverage characterization platform uses an autonomous vehicle or robot, such as an unmanned aerial vehicle or other small robot, to autonomously collect key wireless coverage parameters for an indoor environment. One or more vehicles or robots are equipped with integrated simultaneous localization and mapping sensors as well as wireless signal measurement sensors. As a vehicle traverses the indoor environment, on-board processing components process the sensor measurement data to simultaneously build an indoor map of the environment and to learn the wireless coverage characteristics of the environment incrementally. The vehicle's navigation system guides the vehicle through the environment based on the sensor measurements and the learned indoor map until a complete map of the wireless signal strength at all locations throughout the environment is obtained.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 29, 2015
    Inventor: Vincent Kin Nang Lau
  • Patent number: 9113371
    Abstract: Systems, methods, and apparatus are described that that increase throughput of a WiFi network. A first method is provided wherein access points monitor and keep track of their states on each resource block (frequency channel and antenna pattern) associated therewith and dynamically select the resource blocks that increase network throughput based on the instantaneous states of the access points. A second method is provided comprising employing Q-learning to determine one or more modifications of operating parameters of a network node based on observed throughput of the network and implementing the one or more modifications at the node. A third method is also provided which combines the first and second methods so as to increase network throughput at both the physical layer and the MAC layer.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 18, 2015
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Jiatong Sun, Vincent Kin Nang Lau
  • Patent number: 9055106
    Abstract: Functionality is shared among mobile devices in a peer to peer manner. A mobile device can include a plurality of functional components that can each perform respective functionality. Examples of the functionalities can include transceiver communications, processing, power, memory, input and output for the mobile device. Further, the mobile device can include a sharing component that enables sharing a particular third party functional component to replace or supplement operation of a corresponding functional component of the mobile device. The third party functional component, for instance, can be made available for sharing by at least one of a disparate mobile device or a stand alone functional component. Moreover, a host component can allow a disparate mobile device to use an available one or more of the plurality of functional components of the mobile device.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: June 9, 2015
    Assignee: TUEN SOLUTIONS LIMITED LIABILITY COMPANY
    Inventors: Chi Ying Tsui, Ross David Murch, Roger Shu Kwan Cheng, Wai Ho Mow, Vincent Kin Nang Lau
  • Publication number: 20150139347
    Abstract: Signal interference associated with multi-user multiple-input multiple-output (MIMO) full-duplex wireless communication systems is reduced. In an example, first streams are received by a MIMO base station from uplink user devices based on a first availability of channel matrices and second streams are transmitted to downlink user devices based on a second availability of the channel matrices. A weighted sum of a first data rate for a first linear transceiver matrix and a second data rate of a second linear transceiver matrix is maximized based on the channel matrices, the first streams, and the second streams. The base station generates a first linear transceiver vector used in transmission of the first streams to the base station from the uplink user devices and a second linear transceiver vector used in transmission of the second streams from the base station to the downlink user devices.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 21, 2015
    Inventors: Ross David Murch, Vincent Kin Nang LAU, Shenghong LI
  • Publication number: 20150142914
    Abstract: Cooperative physical layer caching systems for base stations are described herein. Base stations include cache memories that store portions of content. Base stations receive requests for content files from mobile devices. Cooperative physical layer caching systems can determine contents of the cache memories and can coordinate physical transmissions of the content files based on the contents of the cache memories.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Inventors: Vincent Kin Nang LAU, An LIU
  • Patent number: 9001914
    Abstract: Systems, methods, and apparatus are described that employ specially designed interference patterns to build an in-band side channel without degrading the effective throughput of the main channel. Transmitter and receiver pairs implement a two-stage dynamic interference mitigation scheme based on the partial connections in limited dimension MIMO interference channels. The first stage determines the stream assignments and the subspace constraints for beamforming vectors and zero-forcing vectors based on the partially connected topology such as the path loss, shadowing and spatial correlation. The second stage determines the beamforming vectors and the zero-forcing vectors based on the instantaneous channel state information over the subspaces obtained from the first stage. In an aspect, a controller device implements the first and second stage and assigns the transmitter and receiver pairs to perform interference alignment using the stream assignments and beamforming and zero-forcing vectors respectively.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 7, 2015
    Assignee: Dynamic Invention LLC
    Inventors: Liangzhong Ruan, Vincent Kin Nang Lau
  • Publication number: 20150071190
    Abstract: A subset of mobile device candidates in a multi-input multi-output (MIMO) channel of network devices is selected for having a feedback priority among a set of mobile device candidates. The selection is based on a set of queue state information of a plurality of mobile device queues for transmitter and receiver devices of the MIMO channel in a multi-user MIMO network. A portion of the subset of mobile device candidates can be selected by a scheduling component of the system. Communications on the MIMO channels can be scheduled to the portion of the subset of mobile device candidates based on the feedback comprising channel state information and on the queue state information of the plurality of mobile device queues.
    Type: Application
    Filed: April 15, 2014
    Publication date: March 12, 2015
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Vincent Kin Nang LAU, Junting CHEN