Patents by Inventor Xiangyang Zhuang

Xiangyang Zhuang 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: 20200259561
    Abstract: Methods and apparatus for communicating in a wireless network including apparatus comprising transceiver circuitry to send and receive data in a plurality of time periods, defined by a time division duplex (TDD) time grid, to another entity, the plurality of time periods corresponding to a plurality of orthogonal frequency division multiplexing (OFDM) symbols and the transceiver circuitry being operable to switch from receive mode to transmit mode and/or from transmit mode to receive mode according to a flexible uplink and downlink allocation of the plurality of time periods; and baseband circuitry coupled to the transceiver circuitry to control the transceiver circuitry to switch during a switching interval embedded within a time period corresponding to an OFDM symbol of the plurality of OFDM symbols.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 13, 2020
    Inventors: Sabine Roessel, Holger Neuhaus, Yeong-Sun Hwang, Bertram Gunzelmann, Andreas Menkhoff, Elmar Wagner, Jong-Kae Fwu, Xiangyang Zhuang
  • Patent number: 10728797
    Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: July 28, 2020
    Assignee: HFI Innovation INC.
    Inventors: Lung-Sheng Tsai, Xiangyang Zhuang
  • Publication number: 20200213173
    Abstract: Methods and apparatus are provided for narrowband UEs. In one novel aspect, frequency hopping is used. The UE stays on the first frequency band for consecutive number of subframes before hopping to another frequency band. In another embodiment, the first set of resource elements and the second set of resource elements are discontinued with a gap in the time domain. In another novel aspect, the UE obtains sub-band information and a resource index and generates a communication channel for data frame transmission and receiving. In one embodiment, the UE further acquires the sub-band set information through system information. In yet another embodiment, the resource index is acquired from DCI. In yet another novel aspect, resource blocks are selected for a PUCCH for a narrowband UE. The UE determines an operating sub-band information and selects one or more narrowband regions for the PUCCH.
    Type: Application
    Filed: March 11, 2020
    Publication date: July 2, 2020
    Inventors: Feifei SUN, Xiangyang ZHUANG
  • Patent number: 10567074
    Abstract: Methods and apparatus for communicating in a wireless network including apparatus comprising transceiver circuitry to send and receive data in a plurality of time periods, defined by a time division duplex (TDD) time grid, to another entity, the plurality of time periods corresponding to a plurality of orthogonal frequency division multiplexing (OFDM) symbols and the transceiver circuitry being operable to switch from receive mode to transmit mode and/or from transmit mode to receive mode according to a flexible uplink and downlink allocation of the plurality of time periods; and baseband circuitry coupled to the transceiver circuitry to control the transceiver circuitry to switch during a switching interval embedded within a time period corresponding to an OFDM symbol of the plurality of OFDM symbols.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: February 18, 2020
    Assignee: Apple Inc.
    Inventors: Sabine Roessel, Holger Neuhaus, Yeong-Sun Hwang, Bertram Gunzelmann, Andreas Menkhoff, Elmar Wagner, Jong-Kae Fwu, Xiangyang Zhuang
  • Publication number: 20200029328
    Abstract: Apparatus and method are provided to determine the starting subframe of a data channel. In one novel aspect, the UE monitors one or more control channel candidates, which at least one of the control channel candidate occupies a plurality of the subframes. The UE detects a control channel intended for the UE, decodes the control channel and determines the starting subframe of the data channel based on the control channel and a known gap. In another novel aspect, the UE further obtains a subframe indicator from the control channel. The subframe indicator signals either the number of subframes between the starting subframe of the data channel and the starting subframe of the control channel, or the number of subframes of the control channel, or the starting subframe of the data channel. In another embodiment, predefined rule can be applied to the subframe indicator to determining the starting subframe of the data channel.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Inventors: Xiangyang Zhuang, Feifei Sun
  • Patent number: 10491334
    Abstract: Technology for an eNodeB to communicate with a user equipment (UE) using a extended downlink (DL) self-contained frame within a wireless communication network is disclosed. The eNodeB can process data to form an extended downlink (DL) self-contained frame, comprising: a first self-contained subframe including a DL control data, DL data, uplink (UL) control data, and one or more reference symbols; an Mth subframe is located subsequent to the first self-contained subframe, the Mth subframe including one or more resource elements configured for DL data, wherein M is a positive integer greater that is greater than one; and an Nth subframe that is subsequent to the Mth subframe, the Nth subframe including one or more resource elements configured for UL control data. The eNodeB can process the extended DL self-contained frame for transmission to the UE.
    Type: Grant
    Filed: April 2, 2016
    Date of Patent: November 26, 2019
    Assignee: Intel IP Corporation
    Inventors: Sabine Roessel, Holger Neuhaus, Bertram Gunzelmann, Yeong-Sun Hwang, Jong-Kae Fwu, Xiangyang Zhuang
  • Patent number: 10470177
    Abstract: Apparatus and method are provided to determine the starting subframe of a data channel. In one novel aspect, the UE monitors one or more control channel candidates, which at least one of the control channel candidate occupies a plurality of the subframes. The UE detects a control channel intended for the UE, decodes the control channel and determines the starting subframe of the data channel based on the control channel and a known gap. The UE further obtains a subframe indicator from the control channel. The subframe indicator signals either the number of subframes between the starting subframe of the data channel and the starting subframe of the control channel, or the number of subframes of the control channel, or the starting subframe of the data channel. In one embodiment, predefined rule can be applied to the subframe indicator to determining the starting subframe of the data channel.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: November 5, 2019
    Assignee: HFI Innovation INC.
    Inventors: Xiangyang Zhuang, Feifei Sun
  • Patent number: 10411840
    Abstract: Apparatus and methods are provided to enhance HARQ mechanism. In one novel aspect, the UE decodes resource blocks in a HARQ indicator channel and detects a single-state HARQ indicator encoded with a UE ID of the UE. The UE determines a HARQ acknowledgment status for the data transmission based on the HARQ indicator. In one embodiment, the HARQ indicator channel is either a UE-specific channel, a group-specific channel or a cell-specific channel. In another novel aspect, the UE increases a HARQ count upon decoding the HARQ indicator channel. The UE retransmits the data transmission if the HARQ count is smaller than a predefined maximum HARQ count and the HARQ acknowledgement status is determined to be negative. Otherwise, the UE stops the data transmission. In another embodiment, the UE terminates the data transmission is the total repetition number is greater than a predefined maximum data transmission number.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: September 10, 2019
    Assignee: HFI Innovation INC.
    Inventors: Hua-Min Chen, Feifei Sun, Xiangyang Zhuang
  • Patent number: 10396934
    Abstract: Apparatus and methods are provided to report channel status with transmission repetition. In one novel aspect, the mobile station computes a transmission efficiency for a transport block, which is repeatedly transmitted such that the transport block is received with a predefined receiving quality; determines a channel quality indicator based on the transmission efficiency and transmits it to a base station. In one embodiment, the transport block is repeatedly transmitted over multiple subframes. In another novel aspect, the mobile station computes a plurality of transmission efficiencies corresponding to a plurality of transport blocks, wherein at least one transport block is repeatedly transmitted such that each transport block is received with a pre-defined receiving quality.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 27, 2019
    Assignee: HFI Innovation INC.
    Inventors: Feifei Sun, Xiangyang Zhuang, Hua-Min Chen
  • Patent number: 10348431
    Abstract: A method of small cell discovery and RSRP/RSRQ measurements in OFDM/OFDMA systems is proposed. A discovery reference signal (DRS) with low transmission frequency is introduced to support small cell detection within a short time, multiple small cell discovery, and accurate measurement of multiple small cells. The DRS consists of one or multiple reference signal types with the functionalities including timing and frequency synchronization, cell detection, RSRP/RSSI/RSRQ measurements, and interference mitigation. RE muting is configured for the DRS to reduce interference level from data to DRS for discovery and RSRP/RSRQ measurements for small cells.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: July 9, 2019
    Assignee: HFI Innovation INC.
    Inventors: Pei-Kai Liao, Hsiao-Lan Chiang, Chien-Chang Li, Xiangyang Zhuang
  • Patent number: 10284281
    Abstract: A wireless communication base station is disclosed. The base station includes a transceiver coupled to a controller configured to generate a sub-frame having first control region for a first set of users and a second control region for a second set of users that do not receive the first control region, the first control region has a fixed starting location within the sub-frame and the second control region has a starting location that is one of several possible starting locations within the sub-frame, wherein the controller is configured to cause the transceiver to transmit the sub-frame to the first and second sets of users without signaling the starting location of the second control region in the sub-frame.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: May 7, 2019
    Assignee: Google Technology Holdings LLC
    Inventors: Xiangyang Zhuang, Robert T. Love, Vijay Nangia, Ajit Nimbalker, Kenneth A. Stewart
  • Patent number: 10219255
    Abstract: Apparatus and methods are provided for TDM uplink transmission on multiple serving cells with single transmitter. In one novel aspect, the UE selects a serving cell for an UL transmission subframe based on a TDM selection rule. In one embodiment, the switching rule involves identifying one or more serving cells with a highest UL transmission priority and a serving-cell priority rule. In another novel aspect, the UE drops a selected part of the UL transmission within the overlap region based on one or more switching rules, which include dropping a last OFDM symbol, dropping a portion of a last OFDM symbol of the SRS with combing structure, dropping a partial CP of a first OFDM symbol of the second serving cell, and dropping a partial tail of a last OFDM symbol of the first serving cell and partial CP of a first OFDM symbol of the second serving cell.
    Type: Grant
    Filed: January 21, 2018
    Date of Patent: February 26, 2019
    Assignee: HFI Innovation Inc.
    Inventors: Min Wu, Xiangyang Zhuang, Chien-Hwa Hwang, Shiang-Jiun Lin
  • Publication number: 20190052354
    Abstract: Methods and apparatus for communicating in a wireless network including apparatus comprising transceiver circuitry to send and receive data in a plurality of time periods, defined by a time division duplex (TDD) time grid, to another entity, the plurality of time periods corresponding to a plurality of orthogonal frequency division multiplexing (OFDM) symbols and the transceiver circuitry being operable to switch from receive mode to transmit mode and/or from transmit mode to receive mode according to a flexible uplink and downlink allocation of the plurality of time periods; and baseband circuitry coupled to the transceiver circuitry to control the transceiver circuitry to switch during a switching interval embedded within a time period corresponding to an OFDM symbol of the plurality of OFDM symbols.
    Type: Application
    Filed: April 1, 2016
    Publication date: February 14, 2019
    Inventors: SABINE ROESSEL, HOLGER NEUHAUS, YEONG-SUN HWANG, BERTRAM GUNZELMANN, ANDREAS MENKHOFF, ELMAR WAGNER, JONG-KAE FWU, XIANGYANG ZHUANG
  • Publication number: 20190045392
    Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.
    Type: Application
    Filed: October 9, 2018
    Publication date: February 7, 2019
    Inventors: Lung-Sheng Tsai, Xiangyang Zhuang
  • Publication number: 20190013982
    Abstract: Methods for transmitting a waveform in the wireless communication networks are provided. A method for UE to transmit to an eNB an uplink channel carrying data or control information bits, comprising: receiving a downlink channel occupying a set of downlink resource elements, where each downlink resource element has a downlink subcarrier spacing in the frequency domain and a downlink symbol duration in the time domain; generating a SC-FDMA based uplink channel from the information bits, where the uplink channel occupies a set of uplink resource elements and each uplink resource element has a uplink subcarrier spacing in the frequency domain differing from the downlink subcarrier spacing, and a uplink symbol duration in the time domain differing from the downlink symbol duration; and transmitting the SC-FDMA based uplink channel. In one embodiment, the information bits are uplink data information bits. In another embodiment, the information bits are uplink control information bits.
    Type: Application
    Filed: July 10, 2015
    Publication date: January 10, 2019
    Inventors: Feifei SUN, Xiangyang ZHUANG
  • Patent number: 10117131
    Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 30, 2018
    Assignee: HFI Innovation Inc.
    Inventors: Lung-Sheng Tsai, Xiangyang Zhuang
  • Patent number: 10117130
    Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 30, 2018
    Assignee: HFI Innovation Inc.
    Inventors: Lung-Sheng Tsai, Xiangyang Zhuang
  • Patent number: 10111131
    Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 23, 2018
    Assignee: HFI Innovation Inc.
    Inventors: Lung-Sheng Tsai, Xiangyang Zhuang
  • Publication number: 20180254851
    Abstract: Technology for an eNodeB to communicate with a user equipment (UE) using a extended downlink (DL) self-contained frame within a wireless communication network is disclosed. The eNodeB can process data to form an extended downlink (DL) self-contained frame, comprising: a first self-contained subframe including a DL control data, DL data, uplink (UL) control data, and one or more reference symbols; an Mth subframe is located subsequent to the first self-contained subframe, the Mth subframe including one or more resource elements configured for DL data, wherein M is a positive integer greater that is greater than one; and an Nth subframe that is subsequent to the Mth subframe, the Nth subframe including one or more resource elements configured for UL control data. The eNodeB can process the extended DL self-contained frame for transmission to the UE.
    Type: Application
    Filed: April 2, 2016
    Publication date: September 6, 2018
    Inventors: SABINE ROESSEL, HOLGER NEUHAUS, BERTRAM GUNZELMANN, YEONG-SUN HWANG, JONG-KAE FWU, XIANGYANG ZHUANG
  • Patent number: 10057018
    Abstract: A method of DRX operation enhancement in adaptive TDD systems is proposed. A UE configures and enters DRX operation in an LTE/LTE-A mobile communication network. The UE obtains adaptive TDD configuration information from a base station. The adaptive TDD configuration information comprises an actual TDD configuration and a reference TDD configuration. The UE performs DRX timer counting and HARQ timer counting based on the reference TDD configuration. The UE also synchronizes DRX status with the base station. With the reference TDD configuration, it can avoid the potential misunderstanding between eNB and UE regarding DRX and HARQ RTT timing when TDD configuration changes.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: August 21, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shiang-Jiun Lin, Min Wu, Chien-Hwa Hwang, Xiangyang Zhuang