Patents by Inventor Yun Sang ON

Yun Sang ON 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).

  • Apparatus and method for selective power control for an OFDM mobile communication system
    Patent number: 7711386
    Abstract: Disclosed is a method for controlling downlink power transmitted from a base station to subscriber stations in a mobile communication system employing an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, in which data is carried from the base station to the subscriber stations by subchannels to each of which a plurality of subcarriers are assigned. The method includes the steps of receiving from the subscriber stations channel condition information of each of the subchannels together with information related to a subcarrier having a channel condition below a threshold from among at least one subcarrier included in each of the subchannels; calculating transmission power for each of the subchannels based on the received information; and transmitting each of the subchannels with the calculated transmission power, excluding the subcarrier having a channel condition below the threshold.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: May 4, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sang-Hoon Sung, Joong-Ho Jeong, Yun-Sang Park, Soon-Young Yoon, Jae-Hwan Chang
  • Data transmission method for wireless network
    Patent number: 7684343
    Abstract: Disclosed is a device and method that relates to radio engineering and especially to data transmission in a wireless local area network. The method improves the throughput of the wireless local area network, by selecting a transmission rate, data transmission mechanism and a fragment size which maximize the network throughput considering the receiving conditions on the receiver (bit error rate in the transmitted data units of the transmitter ) and taking into account the current network loading are selected for transmission of data units.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: March 23, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Garmonov Alexander Vasil'evich, Seok Ho Cheon, Do Hyon Yim, Ki Tae Han, Savinkov Andrei Yur'evich, Filin Stanislav Anatol'evich, Manelis Vladimir Borisovich, Moiseev Sergey Nikolayevich, Kondakov Mikhail Sergeevich, Yun Sang Park
  • Apparatus and method for transmitting data in a communication system
    Patent number: 7684439
    Abstract: An apparatus and method transmits data in a communication system. A buffer descriptor (BD) generator generates a BD making reference to constituent elements constituting a MAC protocol data unit (PDU), if there is a medium access control (MAC) service data unit (SDU) to be transmitted. A direct memory access (DMA) controller generates the MAC PDU from the MAC SDU according to the BD.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: March 23, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ki-Tae Han, Sun-Ny Chang, Yun-Sang Park
  • Multi-directional toothbrush for protective teeth
    Patent number: 7676875
    Abstract: Disclosed herein is a multi-directional toothbrush for protecting teeth. The multi-directional toothbrush includes a rotatable toothbrush part, a rotatable toothbrush part support frame, and a vertically moving toothbrush part. The rotatable toothbrush part is configured such that a cylindrical toothbrush part is provided on the outer surface of a cylindrical body. The rotatable toothbrush part support frame is configured such that the cam shafts of the rotatable toothbrush part are fitted into respective cam shaft holes. The vertically moving toothbrush part includes a vertically moving frame that is contained in the internal space of the rotatable toothbrush part support frame, and reciprocates up and down using a vertical moving means.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: March 16, 2010
    Inventor: Yun Sang Cho
  • CHEMICAL REACTION-TYPE METAHEURISTIC
    Publication number: 20100057650
    Abstract: Subject matter disclosed herein relates to various embodiments of a chemical reaction-type metaheuristic. According to an embodiment, solutions to an objective function can be determined by iteratively searching for a minimum energy state of one or more interactions of molecules in a chemical reaction. The molecules in the chemical reaction can be assigned to represent the possible outcomes of the objective function. In a specific embodiment, the interactions of the molecules can modeled as on-wall ineffective collisions, decompositions, inter-molecular ineffective collisions, and synthesis. The type of interaction can affect where the next molecular structure is searched.
    Type: Application
    Filed: July 6, 2009
    Publication date: March 4, 2010
    Inventors: VICTOR ON-KWOK LI, Albert Yun Sang Lam
  • Apparatus and method for using contents information in digital rights management
    Publication number: 20100049972
    Abstract: An apparatus and method for determining contents information corresponding to a Rights Object (RO) by transmitting information on contents together when the RO is moved from a mobile device to a memory card or a smart card or when the RO is moved from the memory card or the smart card to the mobile device are provided. The apparatus includes a meta information manager for determining information on contents corresponding to the RO when the RO is moved, and for generating meta information containing the determined contents information, and a controller for providing control to transmit the RO and the meta information generated by the meta information manager to a portable storage device. Accordingly, the conventional problem can be solved in which information on contents cannot be determined by using a Contents IDentifier (CID) if the RO does not exist together with the contents.
    Type: Application
    Filed: August 18, 2009
    Publication date: February 25, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seong Choi, Jung-Hun Park, Yun-Sang Oh
  • Apparatus and Method for Using Secure Removable Media (SRM) in Digital Rights Management
    Publication number: 20100049971
    Abstract: An apparatus and a method for using a Secure Removable Media (SRM) in Digital Rights Management (DRM) are provided. The method for using the SRM in Digital Rights Management (DRM) includes determining, at a plurality of content service providers, an SRM usage rule and providing the determination to a trust authority using an eXtensible Markup Language (XML); receiving messages comprising the SRM usage rule from the content service providers and sending the messages to an apparatus together with an electronic signature; and receiving the messages comprising the SRM usage rule and changing an operation of the apparatus according to requirements of at least one content service provider. Thus, various content business models can be realized.
    Type: Application
    Filed: August 18, 2009
    Publication date: February 25, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Yun-Sang Oh
  • Method for encrypting and decrypting metadata
    Patent number: 7668316
    Abstract: A method of encrypting metadata that can be represented by a tree structure. The method involves generating an encryption key for a predetermined node of the metadata using a function that takes as input parameters an encryption key for an upper node of the predetermined node and information specifying the predetermined node, and encrypting data of the predetermined node using the generated encryption key.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: February 23, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yang-Iim Choi, Yun-sang Kim, Yun-ho Choi, Hyo-seop Shin, Dong-ho Lee
  • Sense amplifier, semiconductor memory device including the same, and data sensing method
    Patent number: 7652942
    Abstract: A sense amplifier includes a reference signal providing unit and an internal sense amplification unit. The reference signal providing unit provides a reference bit line signal in response to a reference control signal. The internal sense amplification unit receives the reference bit line signal and data signals that correspond to the data. The received signals are provided through bit lines connected to the memory cell array. The internal sense amplification unit senses the received reference bit line signal and the data signals and amplifies the sensed signals. The sense amplifier senses data stored in memory cells connected to dummy bit lines of the outmost memory cell array of a semiconductor memory device such that the memory cells that are not used can be used. Accordingly, the design area and cost of the semiconductor memory device can be reduced.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: January 26, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myeong-o Kim, Yun-sang Lee
  • Focusing apparatus and lithography system using the same
    Patent number: 7646003
    Abstract: A focusing apparatus and a lithography system using the same capable of adjusting a uniformity of an electromagnetic field by moving a portion of a magnetic field generator. The focusing apparatus may control a path of an electron beam generated from an electron-beam emitter of the lithography system. In the focusing apparatus, a uniformity of the magnetic field in the vacuum chamber may be adjusted through movement of the portion of the magnetic field generator with respect to the vacuum chamber.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: January 12, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Wook Moon, Dong-Soo Kim, Myung-Gon Song, Seung-Woon Lee, Yun-Sang Oh
  • Adaptive pilot allocation method and apparatus for use in a communication system
    Patent number: 7634014
    Abstract: A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled. When the multipath delay is large, the pilot distribution density is relatively raised. However, when the multipath delay is small, the pilot distribution density is relatively lowered. The pilot distribution density is adaptively controlled according to the multipath delay, such that resources are effectively utilized and throughput is improved.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: December 15, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Min-Cheol Park, Yun-Sang Park, Bong-Gee Song, Tae-Gon Kim
  • Apparatus and method for estimating interference and noise in a communication system
    Patent number: 7623569
    Abstract: A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone (OFDM/OFDMA/DMT) system is disclosed. A correlator correlates a plurality of sub-carriers with a preset reference sequence on an element-by-element basis and outputs a result of the correlation. A signal noise producer calculates a difference between a correlation value associated with each of the plurality of sub-carriers output from the correlator and a correlation value produced from at least one adjacent sub-carrier and outputs a result of the calculation. An interference and noise power producer produce interference and noise power from the difference between the correlation values calculated by the signal noise producer.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: November 24, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Hwan Chang, Yun-Sang Park, Sang-Hoon Sung, Chan-Young Kim
  • Apparatus and method for estimating start of frame
    Patent number: 7623582
    Abstract: Disclosed is an apparatus and method for estimating a start point of a frame in a wireless communication system. The method includes the steps of receiving a frame and estimating the start of the frame by searching for an interval or point of time during or at which a correlation between preambles is at its maximum. At this time, to in order to estimate the start of the frame, a cyclic prefix is used. Thus, a correlation between a cyclic prefix and the last interval of a symbol, which is the same as the cyclic prefix, is calculated and an interval or point of time having the maximum correlation is estimated as the start point of the cyclic prefix. Therefore, the start point of the frame can be accurately estimated based on the start point of the cyclic prefix.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: November 24, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: In-Hyoung Kim, Tae-Gon Kim, Yun-Sang Park, Bong-Gee Song
  • System and method for performing ranging process in a communication system
    Patent number: 7620020
    Abstract: Provided is a system and method for performing a ranging process in a communication system. If a Subscriber Station (SS) detects the insufficiency of UpLink (UL) resources for transmission of a Ranging Request (RNG_REQ) message during the ranging process, it transmits a UL resource allocation request message requesting additional allocation of the UL resources to a Base Station (BS) for additional transmission of the RNG_REQ message to cause the BS to additionally allocate the UL resources for the additional transmission of the RNG_REQ message.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: November 17, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ae-Ri Lim, Yun-Sang Park, Kyeong-Tae Do
  • APPARATUS AND METHOD FOR ALLOCATING UPLINK RESOURCES IN A WIRELESS COMMUNICATION SYSTEM
    Publication number: 20090262671
    Abstract: An apparatus and a method for allocating an uplink resource in a wireless communication system that uses a Half duplex-Frequency Division Duplex (H-FDD) scheme. The apparatus includes a controller and a message generator. The controller determines a resource allocation scheme enabling an F-FDD mobile station to allocate uplink bursts to a first group and a second group using one MAP message. The message generator generates a MAP message indicating the resource allocation scheme determined by the controller.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 22, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-Yun SEOL, Yun-Sang Park, Young-Hak Kim, Chang-Yooo Oh
  • Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system
    Patent number: 7606299
    Abstract: In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics. Interference and noise levels and true received signal levels are computed on a block-by-block basis from the blocked received signals. CINRs are estimated on a block-by-block basis using ratios between the computed interference and noise levels and the computed true received signal levels. The apparatus can estimate a CINR for all channels even when the channel characteristics of the sub-carriers of the received signals are not similar to each other.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Hwan Chang, Yun-Sang Park, Sang-Hoon Sung
  • Apparatus and method for receiving signal in a communication system
    Patent number: 7594160
    Abstract: Provided is an apparatus and method for receiving a signal in communication system. The apparatus and method includes generating a particular log-likelihood ratio (LLR) value by demapping an input signal according to a particular demapping scheme among a plurality of demapping schemes; performing a control operation of buffering the particular LLR value in a particular LLR sub-buffer for buffering an LLR value generated according to the particular demapping scheme among the plurality of LLR sub-buffers for buffering an LLR value generated according to each of the plurality of demapping schemes; and performing a control operation of reading an LLR value buffered in an LLR buffer including the plurality of LLR sub-buffers.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: September 22, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hyung-Sang Cho, Yun-Sang Park, Bong-Gee Song
  • Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system
    Patent number: 7590171
    Abstract: An apparatus and method are provided for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA). In the communication system, all base stations boost a power level for a preamble or pilot by B dB. Accordingly, a received signal power level and a received interference level are boosted by B dB, but a noise level is not boosted. Transmission power for a preamble or pilot interval is boosted as compared with that for the data interval. After an interference and noise level is estimated from a preamble or pilot, the interference and noise level estimate of the preamble or pilot is corrected by taking into account a boosting level of the preamble or pilot.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: September 15, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Hwan Chang, In-Hyoung Kim, Yun-Sang Park, Bong-Gee Song
  • Method and apparatus for restriction use of storage medium using user key
    Patent number: 7590865
    Abstract: A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the disc. Thereafter, the user key undergoes authentication based on a user key received from a host. The authentication is performed by comparing a random number produced by a disc drive with a decrypted random number obtained by the disc drive decrypting a random number encrypted by the host. Accordingly, the use of the disc by an unauthorized third person is restricted, thus preventing a leakage of personal information and a protection of the copyrights of data.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: September 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-hyu Han, Yun-sang Kim, Yang-lim Choi, Yong-kuk You, Hoc-chul Han
  • Apparatus and method for estimating a carrier to interference and noise ratio in a communication system
    Patent number: 7580487
    Abstract: An apparatus and a method for estimating a carrier to interference and noise ratio (CINR) in a communication system. The CINR value is precisely estimated by removing the error floor value, which is caused by the inaccurate sliding average window SAW channel estimation value, from the CINR estimation value. Since the CINR value is precisely estimated, performance of the adaptive power control or the adaptive modulation and coding device is improved.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: August 25, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Hwan Chang, Yun-Sang Park, Bong-Gee Song