Patents by Inventor Tze-Ping Low

Tze-Ping Low 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: 20160191174
    Abstract: A method is proposed to enable a UE performing codeword level interference cancellation (CW-IC) to know whether an interfering transport block (TB) is a new transmission or retransmission. With this knowledge, the UE knows whether the soft channel bits stored in a soft buffer are to be discarded or combined with the soft channel bits newly obtained.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 30, 2016
    Inventors: Chien-Hwa Hwang, Yi-Ju Liao, Tze-Ping Low, Lung-Sheng Tsai
  • Publication number: 20160191225
    Abstract: Methods for rate matching with soft buffer size setting at the transmitter and soft channel bits storage at the receiver for superposition coding are proposed. In the superposition coding scheme, a transport block intended to one UE needs to be decoded by another UE's receiver. However, the soft buffer sizes per code block of the two receivers may not be the same since the size depends on the UE category. The base station can signal the soft buffer size used at the transmitter for rate matching to the UEs for superposition decoding. A UE stores information bits associated with an interfering signal in its soft buffers in accordance with the soft buffer size used at the transmitter for rate matching. As a result, the UE can decode and subtract the interfering signal from the desired signal for superposition coding.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 30, 2016
    Inventors: Chien-Hwa Hwang, Lung-Sheng Tsai, Yi-Ju Liao, Tze-Ping Low
  • Publication number: 20160192383
    Abstract: When the codeword level interference cancellation (CW-IC) is used at the receiver in conjunction with the superposition coding scheme at the transmitter, it is helpful if the soft buffer at the receiver is reserved not only for the desired transport blocks (TBs) but also for the interfering TBs handled by the CW-IC. In so doing, the soft channel bits of interfering TBs at multiple (re)transmissions can be combined to enhance the success rate of data decoding. A soft buffer partition method for the soft channel bits of the desired and interfering TBs in the superposition coding scheme is proposed. The proposed method has a full flexibility in adjusting the soft buffer sizes for the desired and interfering TBs.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 30, 2016
    Inventors: Chien-Hwa Hwang, Yi-Ju Liao, Tze-Ping Low, Lung-Sheng Tsai
  • Publication number: 20160072533
    Abstract: A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 10, 2016
    Inventors: Jangwook Moon, Tze-Ping Low, Craig Burnet
  • Publication number: 20150245406
    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast NAS recovery process is applied to reduce the outage time in the target cell. In a second novel aspect, context fetching is used to reduce the outage time in the target cell. In a third novel aspect, a loss-less reestablishment procedure is proposed to reduce data loss during the connection recovery.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Inventors: Per Johan Mikael Johansson, Yih-Shen Chen, Tze-Ping Low, William Plumb
  • Publication number: 20150245407
    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.
    Type: Application
    Filed: May 8, 2015
    Publication date: August 27, 2015
    Inventors: Per Johan Mikael Johansson, Yih-Shen Chen, Tze-Ping Low, William Plumb
  • Publication number: 20150245405
    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast NAS recovery process is applied to reduce the outage time in the target cell. In a second novel aspect, context fetching is used to reduce the outage time in the target cell. In a third novel aspect, a loss-less reestablishment procedure is proposed to reduce data loss during the connection recovery.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Inventors: Per Johan Mikael Johansson, Yih-Shen Chen, Tze-Ping Low, William Plumb
  • Patent number: 9055560
    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast NAS recovery process is applied to reduce the outage time in the target cell. In a second novel aspect, context fetching is used to reduce the outage time in the target cell. In a third novel aspect, a loss-less reestablishment procedure is proposed to reduce data loss during the connection recovery.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: June 9, 2015
    Assignee: MEDIATEK INC.
    Inventors: Per Johan Mikael Johansson, Yih-Shen Chen, Tze-Ping Low, William Plumb
  • Patent number: 9049698
    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: June 2, 2015
    Assignee: MEDIATEK INC.
    Inventors: Per Johan Mikael Johansson, Yih-Shen Chen, Tze-Ping Low, William Plumb
  • Publication number: 20150049713
    Abstract: A Precoding-codebook-base Secure Uplink (PSU) scheme is proposed to utilize the channel reciprocity, uniqueness, and randomness in solving the secure initiation problem. A UE receives a first reference signal via first downlink channel in a mobile communication network. The UE performs channel estimation based on the first reference signal and thereby obtaining a first channel response matrix of the first downlink channel. The UE then encodes secrecy information onto a second reference signal. The UE transmits the second reference signal via a second uplink channel. The secrecy information is hidden in the uplink channel through a precoding operation such that the secrecy information can be extracted when the second uplink channel is reciprocal to the first downlink channel.
    Type: Application
    Filed: August 15, 2014
    Publication date: February 19, 2015
    Inventors: Pang-Chang Lan, Tze-Ping Low, Jangwook Moon
  • Publication number: 20130142128
    Abstract: A wireless communication system is provided that includes a base station receiving a plurality of input signals that are selectively provided to a plurality of precoders. The precoders perform precoding operations on the input signals and output a first signal. The base station includes an algorithm that minimizes total transmit power per antenna under signal to interference and noise ratio (SINR) target constraints or maximizes the SINR under a sum of power constraint so as to determine power allocation and obtain efficient precoders. A number of mobile receiver units receive the first signal and performs their respective operations to extrapolate the linear estimate of the input signals.
    Type: Application
    Filed: December 2, 2011
    Publication date: June 6, 2013
    Inventors: Yu-Han Yang, Yonggang Hao, William Plumb, Timothy Perrin Fisher-Jeffes, JANGWOOK MOON, Zoran Zvonar, Tze-Ping Low