Patents by Inventor Guoqiang Lu

Guoqiang Lu 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: 20180160400
    Abstract: Systems and methods for improved Physical Downlink Control Channel (PDCCH) Link Adaptation (LA) in carrier aggregation are disclosed. A method of operation of a radio access node includes transmitting multiple control messages to the wireless device via PDCCHs associated with corresponding serving cells of the wireless device, informing the wireless device of data transmissions to be transmitted to the wireless device via Physical Downlink Shared Channels of the corresponding serving cells and concurrently operating multiple Physical Uplink Control Channel (PUCCH) receivers on one serving cell during a Transmit Time Interval during which feedback from the wireless device indicative of reception of the data transmissions is expected, where each PUCCH receiver is capable of receiving a different format PUCCH message if necessary. The method also includes updating an outer loop LA parameter for each of the PDCCHs based on the determined PDCCH transmission status.
    Type: Application
    Filed: April 21, 2015
    Publication date: June 7, 2018
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Qingchao Liu, Guoqiang Lu, Edward Mah
  • Patent number: 9949178
    Abstract: Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node obtains a list of potential sCells for a wireless device. The network node blindly selects an sCell for the wireless device from the list of potential sCells. The network node then configures the wireless device with the selected sCell. Blindly selecting the sCell for the wireless device makes it possible to avoid the use of measurement gaps and reduce throughput loss, according to some embodiments.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: April 17, 2018
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Guoqiang Lu, Lisa Boström, Richard Liu, Jamie Beuerman, Damitha Ranaweera, Edward Mah, Karl D. Mann, Eric W. Parsons, Iris Bujold, Qingchao Liu
  • Patent number: 9887827
    Abstract: In one embodiment, a method of operating a radio access node is provided. The method comprises determining whether support from a secondary cell is required for a wireless device to communicate with the radio access node, and, in response to determining that support from the secondary cell is required, calculating a modified channel condition outer-loop value for the secondary cell; and using the modified channel condition outer-loop value in an initial activation decision step for the secondary cell. The initial activation decision step may comprise activating the secondary cell in response to determining that the sum of a device reported channel condition value and the modified channel condition outer-loop value is above an activation threshold. Corresponding devices, computer programs and radio access nodes adapted to carry out the methods provided are also disclosed.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: February 6, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ping Yu, Peter Hazy, Xixian Chen, James Jianfeng Weng, Ying Shao, Patrick Lie Chin Cheong, Guoqiang Lu, Hong Yu
  • Publication number: 20180026688
    Abstract: Systems and methods for Multiple-Input and Multiple-Output (MIMO) rank reduction to improve downlink throughput are disclosed. A method of operation of a radio access node includes determining that an imbalance between parallel channels of a spatial multiplexing downlink transmission to a wireless device is greater than an imbalance threshold and/or that a Negative Acknowledgement (NACK) rate over time for the parallel channels of a spatial multiplexing downlink transmission reported by the wireless device is greater than a NACK rate threshold. The method also includes, in response to determining that the imbalance between the parallel channels is greater than the imbalance threshold and/or that the NACK rate is greater than the NACK rate threshold, performing a fast rank reduction for a next downlink transmission whereby a rank is reduced from a rank indicator reported by the wireless device to some lower rank. Reducing the rank may improve downlink throughput.
    Type: Application
    Filed: February 16, 2015
    Publication date: January 25, 2018
    Inventors: James Jianfeng Weng, Hua Xu, Xixian Chen, Jianguo Long, Guoqiang Lu, Michael Roger, Ying Shao, Michel Chauvin
  • Publication number: 20170339607
    Abstract: Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node obtains a list of potential sCells for a wireless device. The network node blindly selects an sCell for the wireless device from the list of potential sCells. The network node then configures the wireless device with the selected sCell. Blindly selecting the sCell for the wireless device makes it possible to avoid the use of measurement gaps and reduce throughput loss, according to some embodiments.
    Type: Application
    Filed: August 4, 2017
    Publication date: November 23, 2017
    Inventors: Guoqiang Lu, Lisa Boström, Richard Liu, Jamie Beuerman, Damitha Ranaweera, Edward Mah, Karl D. Mann, Eric W. Parsons, Iris Bujold, Qingchao Liu
  • Patent number: 9756532
    Abstract: Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node obtains a list of potential sCells for a wireless device. The network node blindly selects an sCell for the wireless device from the list of potential sCells. The network node then configures the wireless device with the selected sCell. Blindly selecting the sCell for the wireless device makes it possible to avoid the use of measurement gaps and reduce throughput loss, according to some embodiments.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: September 5, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Guoqiang Lu, Karl D. Mann, Lisa Boström, Eric W. Parsons, Richard Liu, Iris Bujold, Jamie Beuerman, Qingchao Liu, Damitha Ranaweera, Edward Mah
  • Patent number: 9713189
    Abstract: Systems and methods for subframe-based link adaptation for a radio signal in a cellular communications network are disclosed. In one embodiment, a base station obtains a hybrid automatic repeat request acknowledgement for data transmitted between the base station and a mobile terminal in a radio signal of the base station. The base station then updates a parameter (e.g., SINR offset) used to control a Modulation and Coding Scheme (MCS) for transmission of data between the base station and the mobile terminal in the radio signal for one or more subframes in a frame structure of the radio signal based on the hybrid automatic repeat request acknowledgement. The one or more subframes are a subset of all of the subframes in the frame structure of the radio signal.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: July 18, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Guoqiang Lu, Ping Yu, Fredrik Huss, Edward Mah
  • Patent number: 9609612
    Abstract: A method and apparatus for frequency offset estimation exploits the differences in reference symbol timing for different channels to resolve ambiguities in the frequency offset estimation. Based on the initial frequency offset estimates, a hypothesis table is constructed providing hypothesized frequency offsets for each channel for a plurality of possible offset regions. An error metric for each offset region is calculated based on the difference of the hypothesized frequency offsets. The set of hypothesized frequency offsets that minimize the error metric is selected as the final frequency offset estimates.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: March 28, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Guoqiang Lu, Oskar Mauritz, Fredrik Huss, Henrik Back
  • Patent number: 9540942
    Abstract: A shaft sealing system and method are disclosed for a high or intermediate pressure turbine section having a rotating member including a shaft and a stationary member surrounding the rotating member and defining a steam flow path. The shaft sealing system comprises at least one seal disposed about each of a first end and a second end of the shaft; and a connection line for conducting steam from the first turbine section to a downstream portion of the turbine. The downstream portion of the turbine is one of a low pressure section and a condenser, and has a lower pressure than both of the first turbine section and ambient pressure conditions.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: January 10, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Daniel Robert Coffey, Guoqiang Lu, John Richard Powers, Steven Paul Scarlata, Christopher David Suttles
  • Publication number: 20160277172
    Abstract: In one embodiment, a method of operating a radio access node is provided. The method comprises determining whether support from a secondary cell is required for a wireless device to communicate with the radio access node, and, in response to determining that support from the secondary cell is required, calculating a modified channel condition outer-loop value for the secondary cell; and using the modified channel condition outer-loop value in an initial activation decision step for the secondary cell, The initial activation decision step may comprise activating the secondary cell in response to determining that the sum of a device reported channel condition value and the modified channel condition outer-loop value is above an activation threshold. Corresponding devices, computer programs and radio access nodes adapted to carry out the methods provided are also disclosed.
    Type: Application
    Filed: March 16, 2015
    Publication date: September 22, 2016
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Ping YU, Peter HAZY, Xixian CHEN, James Jianfeng WENG, Ying SHAO, Patrick LIE CHIN CHEONG, Guoqiang LU, Hong YU
  • Patent number: 9379842
    Abstract: A method and base station for adjusting outer-loop adjustment values used for link adaptation in a wireless communication network is provided. A modulation of a user equipment is determined and a success or failure of a Transport Block (TB) based on a TB feedback message is determined. Based on the TB feedback, one of an acknowledgement counter and a non-acknowledgement counter is incremented corresponding to the determined modulation. An upward step size for the determined modulation is updated based on the respective acknowledgement counter and the non-acknowledgement counter to affect link adaption.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: June 28, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xixian Chen, Hong Ren, Edward Mah, Shiguang Guo, Ping Yu, Guoqiang Lu
  • Patent number: 9255486
    Abstract: A brush seal for use between a rotating component and a stationary component in a turbomachine is disclosed. The brush seal according to embodiments of this invention includes a set of bristles having a fixed end and a free end, wherein the fixed end is attached to the rotating component with a mechanical clamping element and the free end extends towards the stationary component, and wherein the set of bristles are angled axially at an axial angle with respect to the rotating component. In one embodiment, the fixed end of the set of bristles are wrapped at least partially around a core element and the clamping element partially surrounds the core element and the fixed end of the set of bristles, wherein the clamping element secures the fixed end of the set of bristles within a circumferential groove in the rotating component.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: February 9, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Guoqiang Lu, Mehmet Demiroglu, Binayak Roy, Deepak Trivedi, Xiaoqing Zheng
  • Patent number: 9246651
    Abstract: A method and base station for outerloop adjustment for link adaptation of a physical downlink control channel, PDCCH, in a communication network to determine a control channel element, CCE, aggregation level of a downlink assignment downlink control information, DCI, and a CCE aggregation level of an uplink grant DCI is provided. A downlink data packet feedback corresponding to the downlink assignment is received. A status of the downlink data packet feedback is determined. An uplink data packet corresponding to the uplink grant is received and a status thereof is determined. An outerloop downlink adjustment and outerloop uplink adjustment are updated based on at least one of the status of the downlink data packet feedback corresponding to the downlink assignment and status of the uplink data packet corresponding to the uplink grant. An outerloop uplink adjustment is determined as a sum of the outerloop downlink adjustment and an offset adjustment.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: January 26, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Shiguang Guo, Guoqiang Lu, Xixian Chen, Ping Yu, Hong Ren, Ahmed Nouah
  • Publication number: 20150230193
    Abstract: A method and apparatus for frequency offset estimation exploits the differences in reference symbol timing for different channels to resolve ambiguities in the frequency offset estimation. Based on the initial frequency offset estimates, a hypothesis table is constructed providing hypothesized frequency offsets for each channel for a plurality of possible offset regions. An error metric for each offset region is calculated based on the difference of the hypothesized frequency offsets. The set of hypothesized frequency offsets that minimize the error metric is selected as the final frequency offset estimates.
    Type: Application
    Filed: April 20, 2015
    Publication date: August 13, 2015
    Inventors: Guoqiang Lu, Oskar Mauritz, Fredrik Huss, Henrik Back
  • Publication number: 20150223125
    Abstract: Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node in the cellular communications network obtains geographic signatures for a number of candidate sCells. The geographic signatures include a geographic signature for each candidate sCell that approximates a coverage area of the candidate sCell. The network node obtains position information for a wireless device and then selects one or more sCells for the wireless device from the candidate sCells based on the geographic signatures for the candidate sCells and the position information for the wireless device. The network node then configures the selected sCell(s) for use by the wireless device according to a carrier aggregation scheme. Using this process, sCell selection is performed, in some examples, without measurement gaps and without disabling an s-Measure parameter.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 6, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Guoqiang Lu, Karl D. Mann, Lisa Boström, Eric W. Parsons, Richard Liu, Iris Bujold, Jamie Beuerman, Qinqchao Liu, Damitha Ranaweera, Edward Mah
  • Publication number: 20150172022
    Abstract: A method and base station for outerloop adjustment for link adaptation of a physical downlink control channel, PDCCH, in a communication network to determine a control channel element, CCE, aggregation level of a downlink assignment downlink control information, DCI, and a CCE aggregation level of an uplink grant DCI is provided. A downlink data packet feedback corresponding to the downlink assignment is received. A status of the downlink data packet feedback is determined. An uplink data packet corresponding to the uplink grant is received and a status thereof is determined. An outerloop downlink adjustment and outerloop uplink adjustment are updated based on at least one of the status of the downlink data packet feedback corresponding to the downlink assignment and status of the uplink data packet corresponding to the uplink grant. An outerloop uplink adjustment is determined as a sum of the outerloop downlink adjustment and an offset adjustment.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 18, 2015
    Inventors: Shiguang GUO, Guoqiang LU, Xixian CHEN, Ping YU, Hong REN, Ahmed NOUAH
  • Publication number: 20150117321
    Abstract: A method and base station for adjusting outer-loop adjustment values used for link adaptation in a wireless communication network is provided. A modulation of a user equipment is determined and a success or failure of a Transport Block (TB) based on a TB feedback message is determined. Based on the TB feedback, one of an acknowledgement counter and a non-acknowledgement counter is incremented corresponding to the determined modulation. An upward step size for the determined modulation is updated based on the respective acknowledgement counter and the non-acknowledgement counter to affect link adaption.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Inventors: Xixian CHEN, Hong REN, Edward MAH, Shiguang GUO, Ping YU, Guoqiang LU
  • Patent number: 9014314
    Abstract: A method and apparatus for frequency offset estimation exploits the differences in reference symbol timing for different channels to resolve ambiguities in the frequency offset estimation. Based on the initial frequency offset estimates, a hypothesis table is constructed providing hypothesized frequency offsets for each channel for a plurality of possible offset regions. An error metric for each offset region is calculated based on the difference of the hypothesized frequency offsets. The set of hypothesized frequency offsets that minimize the error metric is selected as the final frequency offset estimates.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: April 21, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Guoqiang Lu, Oskar Mauritz, Fredrik Huss, Henrik Back
  • Patent number: 8991432
    Abstract: A touch switch shower includes a shower body and a switch control device. The shower body is disposed with a root waterway, several diversion waterways and an outlet cover unit, each diversion waterway is disposed with an electromagnetic valve to control the on-off thereof. The front side of the outlet cover unit is divided into several touch areas with the same number of electromagnetic valves. The switch control device is disposed at least a processing unit, several touch modules with same number with the electromagnetic valves and a power device connected to the processing unit, the touch layer of the touch module is separately disposed in the corresponding touch area of the outlet cover unit, the processing unit is connected to the touch module in signal way, the processing unit is connected to the electromagnetic valve in signal way. The touch layer is separately disposed in the touch area.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 31, 2015
    Assignees: Xiamen Solex High-Tech Industries Co., Ltd.
    Inventors: Huasong Zhou, Guoqiang Lu, Xiaozhao Sun, Xianguo Zou
  • Publication number: 20150087315
    Abstract: Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node obtains a list of potential sCells for a wireless device. The network node blindly selects an sCell for the wireless device from the list of potential sCells. The network node then configures the wireless device with the selected sCell. Blindly selecting the sCell for the wireless device makes it possible to avoid the use of measurement gaps and reduce throughput loss, according to some embodiments.
    Type: Application
    Filed: April 11, 2014
    Publication date: March 26, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Guoqiang Lu, Karl D. Mann, Lisa Boström, Eric W. Parsons, Richard Liu, Iris Bujold, Jamie Beuerman, Qinqchao Liu, Damitha Ranaweera, Edward Mah