Patents by Inventor Jiann-Ching Guey

Jiann-Ching Guey 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).

  • Even-Length Sequence For Synchronization And Device Identification In Wireless Communication Systems
    Publication number: 20180248737
    Abstract: Techniques, schemes and examples pertaining to using even-length sequence for synchronization and device identification in wireless communications are described. A processor of an apparatus can generate a signal containing at least an even-length Zadoff-Chu (ZC) sequence and transmit the signal to a receiving device. The even-length ZC sequence identifies the apparatus, carries information for signaling, or functions in time-frequency synchronization. The processor can also receive a signal containing at least an even-length ZC sequence and detect the even-length ZC sequence in the received signal.
    Type: Application
    Filed: February 23, 2018
    Publication date: August 30, 2018
    Inventors: Jiann-Ching Guey, Chun-Hsuan Kuo, Chao-Cheng Su, Lung-Sheng Tsai
  • Mechanism for Beam Reciprocity Determination and Uplink Beam Management
    Publication number: 20180227786
    Abstract: A method of beam reciprocity state reporting and uplink beam management in wireless communication systems with beamforming is proposed. In one novel aspect, a BS configures one or more resource sets to a UE for uplink beam management. The one or more resource sets are allocated for UE to transmit UL reference signals using a number of UE beams. The number of UE beams to be trained is reported by the UE, e.g., via a “UE beam reciprocity state (update)” message. The BS also indicates whether a fixed UE TX beam or which UE TX beam is used for transmission, or indicates whether different UE TX beams are used for transmission of different resources in a resource set. The BS then feedback measurement results for UE to choose a proper TX beam.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 9, 2018
    Inventors: Chia-Hao Yu, Ming-Po Chang, Jiann-Ching Guey
  • Mechanism for Beam Reciprocity Determination and Uplink Beam Management
    Publication number: 20180227772
    Abstract: A method of beam reciprocity state reporting and uplink beam management in wireless communication systems with beamforming is proposed. In one novel aspect, a UE determines its UE beam reciprocity state and sends a “UE beam reciprocity state” message to a BS, which triggers proper uplink beam management accordingly. The UE beam reciprocity state message can take place when UE tries to register to the network. For example, according to factory setting, UE reports at least “Positive” or “Negative” in this message. Beam reciprocity state can be updated by a “UE beam reciprocity state update” message. An auxiliary information can be transmitted to the BS for UL beam management if UE reports “Negative” for beam reciprocity state. The auxiliary information indicates the uncertainty level of UE beams.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 9, 2018
    Inventors: Chia-Hao Yu, Ming-Po Chang, Jiann-Ching Guey
  • Beam Failure Recovery Mechanism for Multi-Beam Operation
    Publication number: 20180227899
    Abstract: A method of beam failure recovery for multi-beam operation in wireless communication systems with beamforming is proposed. Specifically, a four-step beam failure recovery procedure is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam pair link. In a second step of new candidate beam identification, UE performs measurements for candidate beam selection. In a third step of beam failure recovery request (BFRQ) transmission, UE transmits a BFRQ message to BS upon the triggering condition for BFRQ transmission is satisfied. In a fourth step of monitoring BS response, UE monitors BS response to decide the success or failure of the beam failure recovery.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 9, 2018
    Inventors: Chia-Hao Yu, Yuanyuan Zhang, Ming-Po Chang, Jiann-Ching Guey
  • Spatial diversity scheme in communication systems of beamforming
    Patent number: 10009072
    Abstract: A method of providing spatial diversity for critical data delivery in a beamformed mmWave smallcell is proposed. The proposed spatial diversity scheme offers duplicate or incremental data/signal transmission and reception by using multiple different beams for the same source and destination. The proposed spatial diversity scheme can be combined with other diversity schemes in time, frequency, and code, etc. for the same purpose. In addition, the proposed spatial diversity scheme combines the physical-layer resources associated with the beams with other resources of the same or different protocol layers. By spatial signaling repetition to avoid Radio Link Failure (RLF) and Handover Failure (HOF), mobility robustness can be enhanced. Mission-critical and/or time-critical data delivery can also be achieved without relying on retransmission.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: June 26, 2018
    Assignee: MEDIATEK INC.
    Inventors: Aimin Justin Sang, Chia-Hao Yu, Yuanyuan Zhang, Jiann-Ching Guey
  • Initial Access Procedure for Multi-Beam Operation
    Publication number: 20180123650
    Abstract: Apparatus and methods are provided for initial access in the multi-beam operation. In one novel aspect, the UE receives multiple response messages and selects one message as the response message. In one embodiment, the UE selects a subset of a configured UL resources, transmits a first message, wherein the first message is transmitted one or more times on each of the selected set of UL resources, receives one or more first-message-response messages from the BS, and selects one response message, wherein the selected response message indicates a corresponding BS RX resource, which is used by the UE for subsequent communication with the BS. In one embodiment, the selection of UL resources is at least based on transmitting spatial characteristics of the BS, the UE or both, which indicates whether the BS/UE is reciprocal, partial reciprocal or non-reciprocal.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 3, 2018
    Inventors: Chia-Hao Yu, Yuanyuan Zhang, Ming-Po Chang, Guo Hau Gau, Jiann-Ching Guey
  • Methods for efficient beam training and communications apparatus and network control device utilizing the same
    Patent number: 9954590
    Abstract: A network control device includes a wireless communications module and a controller. The wireless communications module uses a preferred transmitting beam to communicate with a communications apparatus in one or more downlink opportunities corresponding to the preferred transmitting beam. The controller schedules signal or data to be transmitted in at least one downlink opportunity corresponding to the preferred transmitting beam. When scheduling signal or data to be transmitted, the controller further provides at least one training gap, in which the controller does not schedule any dedicated data to the communications apparatus, in the downlink opportunity corresponding to the preferred transmitting beam.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: April 24, 2018
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Ming-Po Chang, Jiann-Ching Guey
  • METHOD AND APPARATUS FOR SYNCHRONIZATION
    Publication number: 20180097677
    Abstract: Aspects of the disclosure provide an apparatus that includes a baseband processing circuit and a transmitting circuit. The baseband processing circuit is configured to encode a reference signal based on a specific sequence to generate a digital stream. The specific sequence has non-zero values at selected positions, and the number of coincidences of non-zero value positions between the specific sequence and a shifted copy of the specific sequence is smaller than a threshold. The transmitting circuit is configured to transmit wireless signals in response to the digital stream.
    Type: Application
    Filed: June 7, 2017
    Publication date: April 5, 2018
    Applicant: MEDIATEK INC.
    Inventors: Jiann-Ching Guey, Chun-Hsuan Kuo, Chao-Cheng Su
  • Synchronization in a Beamforming System
    Publication number: 20180097554
    Abstract: A beamforming system synchronization architecture is proposed to allow a receiving device to synchronize to a transmitting device in time, frequency, and spatial domain in the most challenging situation with very high pathloss. A periodically configured time-frequency resource blocks in which the transmitting device uses the same beamforming weights for its control beam transmission to the receiving device. A pilot signal for each of the control beams is transmitted in each of the periodically configured time-frequency resource blocks. The same synchronization signal can be used for all stages of synchronization including initial coarse synchronization, device and beam identification, and channel estimation for data demodulation.
    Type: Application
    Filed: November 22, 2017
    Publication date: April 5, 2018
    Inventors: Jiann-Ching Guey, Chao-Cheng Su, Ju-Ya Chen
  • BEAM MANAGEMENT IN BEAMFORMING SYSTEMS
    Publication number: 20180049042
    Abstract: Aspects of the disclosure provide a method for beam management at a base station (BS) in a wireless communication system. The method can include transmitting a beam training reference signal (RS) resource configuration from a base station (BS) to a user equipment (UE) in a wireless communication system, transmitting an anchor association index indicating an association between a beam pair link and a set of second transmit beams of the BS, wherein the beam pair link is formed by a first transmit beam of the BS and a receive beam of the transmitting beam training RSs according to the beam training RS resource configuration on the set of second transmit beams, and receiving a measurement report including quality measurements of beamformed channels over the receive beam and a subset of the second transmit beams.
    Type: Application
    Filed: August 11, 2017
    Publication date: February 15, 2018
    Applicant: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Jiann-Ching Guey, Ming-Po Chang
  • Synchronization in a beamforming system
    Patent number: 9882620
    Abstract: A beamforming system synchronization architecture is proposed to allow a receiving device to synchronize to a transmitting device in time, frequency, and spatial domain in the most challenging situation with very high pathloss. A periodically configured time-frequency resource blocks in which the transmitting device uses the same beamforming weights for its control beam transmission to the receiving device. A pilot signal for each of the control beams is transmitted in each of the periodically configured time-frequency resource blocks. Pilot symbols are inserted into pilot structures and repeated for L times in each pilot structure. The L repetitions can be implemented by one or more Inverse Fast Fourier Transfers (IFFTs) with corresponding one or more cyclic prefix (CP) lengths.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: January 30, 2018
    Assignee: MEDIATEK INC.
    Inventors: Jiann-Ching Guey, Chao-Cheng Su, Ju-Ya Chen
  • Methods for efficient beam training and communications apparatus and network control device utilizing the same
    Patent number: 9876549
    Abstract: A communications apparatus includes a wireless communications module and a controller. The wireless communications module uses a preferred receiving beam determined in a beam training procedure to communicate with a network control device and further monitors one or more candidate receiving beam(s) by using the one or more candidate receiving beam(s) to receive signals from the network control device. The controller calculates a detection metric for the preferred receiving beam and the preferred control beam and a detection metric for each combination of the one or more candidate receiving beam(s) and the preferred control beam, and determines whether to change the preferred receiving beam according to the detection metrics for the preferred receiving beam and the preferred control beam and for each combination of the one or more candidate receiving beam(s) and the preferred control beam.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: January 23, 2018
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Ming-Po Chang, Jiann-Ching Guey
  • Energy efficient operation for wireless access nodes in a low-load service area within a dense deployment of wireless access nodes
    Patent number: 9872332
    Abstract: Systems and methods are disclosed for efficient operation of wireless access nodes in a dense deployment of wireless access nodes in a cellular communication network. In general, the dense deployment of wireless access nodes includes multiple wireless access nodes in a service area. The service area is preferably, but not necessarily, a low-load service area. As used herein, a low-load service area is an area within an overall service area of the dense deployment of wireless access nodes in which all wireless access nodes are not needed to provide a desired data capacity. Overlapping radio coverage areas of the wireless access nodes in, or serving, the service area are leveraged to enable efficient operation of the wireless access nodes in the service area.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: January 16, 2018
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jiann-Ching Guey, Kumar Balachandran, Dennis Hui
  • Synchronization in a beamforming system
    Patent number: 9866299
    Abstract: A beamforming system synchronization architecture is proposed to allow a receiving device to synchronize to a transmitting device in time, frequency, and spatial domain in the most challenging situation with very high pathloss. A periodically configured time-frequency resource blocks in which the transmitting device uses the same beamforming weights for its control beam transmission to the receiving device. A pilot signal for each of the control beams is transmitted in each of the periodically configured time-frequency resource blocks. The same synchronization signal can be used for all stages of synchronization including initial coarse synchronization, device and beam identification, and channel estimation for data demodulation.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: January 9, 2018
    Assignee: MEDIATEK INC.
    Inventors: Jiann-Ching Guey, Chao-Cheng Su, Ju-Ya Chen
  • Channel state information collection for wireless communication system with beamforming
    Patent number: 9853707
    Abstract: A method of providing channel station information in a beamforming system is proposed. Reference Signal (RS) is used for channel state estimation. For fine-resolution dedicated beam with smaller spatial coverage, additional channel monitoring of coarse-resolution beams for beam fallback is applied. The joint coverage of monitored fallback beams covers a desired service area. For beam administration, fallback beams need to be evaluated and the most preferable beam is selected for use in case the currently used dedicated beam is no longer suitable. For link adaptation, at least the channel state of the selected fallback beam is evaluated and provided to a scheduler (e.g., a BS) for adapting the transmission of the selected fallback beam.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: December 26, 2017
    Assignee: MEDIATEK INC
    Inventors: Chia-Hao Yu, Ming-Po Chang, Ju-ya Chen, Jiann-Ching Guey
  • Reference Signal Provisioning and Channel Information Reporting for Wireless Directional Transmission Systems
    Publication number: 20170347276
    Abstract: Mechanisms for wireless directional transmission systems are proposed. In a first novel aspect, a mechanism for reference signal provisioning and channel information reporting is proposed. Two sets of measurement pilots are introduced for initial access and control signaling. In a second novel aspect, a beamwidth adaptation mechanism is proposed to deal with occasional channel variation without requiring constantly high overhead due to measurement pilot transmission. In a third novel aspect, a mechanism for backhaul link to activate/deactivate efficiently is proposed. New states of activated state and deactivated state are introduced.
    Type: Application
    Filed: May 26, 2017
    Publication date: November 30, 2017
    Inventors: Chia-Hao Yu, Jiann-Ching Guey
  • Methods and Apparatus for Generating Beam Pattern with Wider Beam Width in Phased Antenna Array
    Publication number: 20170332249
    Abstract: A method of steering beam direction and shaping beamwidth of a directional beam using a phased antenna array in a beamforming cellular system is proposed. The N antenna elements of the phased antenna array are applied with a set of combined beam coefficients to steer the direction of the beam and to shape the beamwidth to a desired width. Specifically, in addition to the original constant phase shift values, additional phase modulations are applied to expand the beam to a desirable width. The phased antenna array applied with the combined beam coefficients involve only phase shift, no amplitude modulation is needed and thereby increasing beamforming gain and efficiency.
    Type: Application
    Filed: May 8, 2017
    Publication date: November 16, 2017
    Inventors: Jiann-Ching Guey, Ming-Po Chang, Ju-Ya Chen
  • Cyclic prefix for non-contiguous signal transmission
    Patent number: 9735993
    Abstract: Transmitted signals are modified to facilitate the emulation of circular convolution in non-contiguous transmission environments. These modified signals may be derived from well-known signature sequences. In an exemplary method, a tail portion of a final segment of a base signal is prefixed to an initial segment of the base signal, to form a first transmit segment. One or more additional transmit segments are formed by prefixing, to each of the one or more segments of the base signal other than the initial segment, a tail portion of the immediately preceding segment of the base signal. The transmit segments so formed are transmitted in respective ones of the plurality of non-contiguous transmit-time intervals. Corresponding methods for receiving the transmitted segments and reconstructing the base signal are also described, as are corresponding transmitting and receiving apparatuses.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: August 15, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jiann-Ching Guey, Havish Koorapaty
  • Synchronization in a beamforming system
    Patent number: 9705581
    Abstract: A beamforming system synchronization architecture is proposed to allow a receiving device to synchronize to a transmitting device in time, frequency, and spatial domain in the most challenging situation with very high pathloss. A detector at the receiving device detects the presence of control beams, synchronizes to the transmission and estimates the channel response by receiving pilot signals. The detector has low complexity when exploiting the structure of the pilot signals. The detector consists of three stages that break down the synchronization procedure into less complicated steps. The detector accurately estimates the parameters required for identifying the transmit device and performing subsequent data communication.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: July 11, 2017
    Assignee: MEDIATEK INC.
    Inventors: Jiann-Ching Guey, Chao-Cheng Su, Ju-Ya Chen
  • Control signaling in a beamforming system
    Patent number: 9698884
    Abstract: A method of control signaling in a beamforming system is proposed. A base station allocates a first sets of DL control resource blocks for DL transmission to a plurality of user equipments (UEs) in a beamforming network. Each set of DL control resource blocks is associated with a corresponding set of beamforming weights. The base station also allocates a second sets of UL control resource blocks for UL transmission from the UEs. Each set of UL control resource blocks is associated with the same corresponding set of beamforming weights. The base station transmits cell and beam identification information using a set of control beams. Each control beam comprises a set of DL control resource block, a set of UL control resource block, and the corresponding set of beamforming weights.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: July 4, 2017
    Assignee: MediaTek Inc.
    Inventors: Jiann-Ching Guey, Chia-Hao Yu, Ming-Po Chang