Patents by Inventor CHIAO YAO CHUANG

CHIAO YAO CHUANG 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: 10111066
    Abstract: Methods to support measurements for LTE user equipments are proposed. Due to reduced bandwidth design for cost reduction, resources for UEs are limited to contiguous six physical resource block (PRB) pairs (1.4 MHz). Six or less contiguous PRBs per narrow sub-band located in the whole channel bandwidth is allocated for transmission and reception for UEs. Novel control channel and data channel designs are proposed to make UEs be able to camp on LTE cells. Methods for intra-frequency measurement, for received signal time difference (RSTD) measurement, and for channel quality assessment for UEs are also provided. In one embodiment, UE is allocated with a measurement gap for intra-frequency measurements and RSTD measurements. In another embodiment, UE is configured with a frequency-hopping pattern and receives a PRB pair starting index per subframe for CSI measurement.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: October 23, 2018
    Assignee: HFI Innovation Inc.
    Inventors: Kuhn-Chang Lin, Tsang-Wei Yu, Chiao Yao Chuang
  • Publication number: 20180279352
    Abstract: A method of two-layer (Rank=2) demodulation reference signal (DMRS) based transmission scheme is proposed. The precoding matrix on a data RE can be represented as A×B. The precoding matrix on the UE-specific reference signal DMRS is A. Matrix B is the co-phasing cycling matrix. By applying the proposed co-phasing cycling matrix B for Rank=2 DMRS-based transmission scheme, the ratio of PDSCH EPRE to DMRS EPRE is equal to OdB, as required by the LTE specification. Further, when the DMRS power follows the precoding matrix A, UE channel estimation performance is improved.
    Type: Application
    Filed: March 21, 2018
    Publication date: September 27, 2018
    Inventors: Chiao Yao Chuang, Song Jheng Lin, Yih-Shen Chen
  • Publication number: 20160219601
    Abstract: Methods to support measurements for LTE user equipments are proposed. Due to reduced bandwidth design for cost reduction, resources for UEs are limited to contiguous six physical resource block (PRB) pairs (1.4 MHz). Six or less contiguous PRBs per narrow sub-band located in the whole channel bandwidth is allocated for transmission and reception for UEs. Novel control channel and data channel designs are proposed to make UEs be able to camp on LTE cells. Methods for intra-frequency measurement, for received signal time difference (RSTD) measurement, and for channel quality assessment for UEs are also provided. In one embodiment, UE is allocated with a measurement gap for intra-frequency measurements and RSTD measurements. In another embodiment, UE is configured with a frequency-hopping pattern and receives a PRB pair starting index per subframe for CSI measurement.
    Type: Application
    Filed: January 27, 2016
    Publication date: July 28, 2016
    Inventors: Kuhn-Chang Lin, Tsang-Wei Yu, Chiao Yao Chuang
  • Publication number: 20160219587
    Abstract: Control channel and data channel design for LTE user equipments are proposed. Due to reduced bandwidth design for cost reduction, resources for UEs are limited to contiguous six physical resource block (PRB) pairs (1.4 MHz). Six or less contiguous PRBs per narrow sub-band located in the whole channel bandwidth is allocated for transmission and reception for UEs. Novel control channel and data channel designs are proposed to make UEs be able to camp on LTE cells. In one embodiment, control channel configuration information is provided to UE. The control channel occupies one or more subframes within the allocated resources. The control channel configuration information comprises a number of aggregation level, a number of repetition, and a number of blind decoding trials.
    Type: Application
    Filed: January 27, 2016
    Publication date: July 28, 2016
    Inventors: KUHN-CHANG LIN, TSANG-WEI YU, CHIAO YAO CHUANG