Patents by Inventor Yong-Xing Zhou

Yong-Xing Zhou 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: 20070014236
    Abstract: A scheduling method includes classifying, by a PC, terminals into delay-sensitive terminals and delay-insensitive terminals according to their traffic types; setting an initial value and a maximum value of a poll failure counter of each of the delay-sensitive terminals; polling each of the delay-sensitive terminals; determining whether there exists a delay-sensitive terminal of which a current value of the poll failure counter is less than the maximum value; and if there exists no delay-sensitive terminal of which the present value of the poll failure counter is less than the maximum value, sequentially polling the delay-sensitive terminals and the delay-insensitive terminals. Accordingly, QoS of voice packet transmission in an IP network can be guaranteed by granting priority to terminals generating traffic in reality according to traffic patterns of the terminals requiring strict QoS, such as a voice call service, and polling the terminals in a round robin mechanism.
    Type: Application
    Filed: July 17, 2006
    Publication date: January 18, 2007
    Applicants: Samsung Electronics Co., Ltd., Tsinghua University
    Inventors: Kyung-Hun Jang, Pinyi Fan, Zhigang Cao, Shufu Mao, Yung-Soo Kim, Yong-Xing Zhou, Jianjun Li
  • Publication number: 20050084030
    Abstract: A method and apparatus for transmitting a preamble for frame synchronization and channel estimation in a MIMO-OFDM communication system are provided. An OFDM communication system using Q transmit antennas generates a base preamble sequence including a CP and an orthogonal sequence. If Q?a predetermined number M, a preamble sequence for a kth antenna is S(t?(k?1)T/Q). If Q>M and k?M, the preamble sequence transmitted for the kth antenna is S(t?(k?1)T/Q). If Q>M and k>M, the preamble sequence for the kth antenna is (?1)(ps?1)S(t?(k?1)T/Q). Here, S(t) is the orthogonal sequence, T is the period of the orthogonal sequence, and PS is an index indicating a transmission period of the preamble sequence. The preamble sequences are at least twice transmitted from the Q transmit antennas.
    Type: Application
    Filed: October 14, 2004
    Publication date: April 21, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yong-Xing Zhou, Jong-Han Kim