Patents Assigned to Research and Industrial Cooperation Group
  • Publication number: 20080106383
    Abstract: A query tree based tag identification method in RFID systems includes: (a) forming a temporary ID for each of the tags; (b) comparing an inquiry of the reader with a portion of the temporary ID in each tag when receiving the inquiry from the reader; (c) if the inquiry and the portion of the temporary ID are identical to each other, transmitting a remainder of the temporary ID in each tag to the reader; (d) if a collision occurs in the step (c), generating new inquiries for storing them in the reader; (e) if there is no collision in the step (c), transmitting an ACK signal to each tag whose temporary ID is identified to receive its real tag ID therefrom; and (f) repeating the steps (b) to (e) until there is no inquiry in the reader.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 8, 2008
    Applicant: RESEARCH AND INDUSTRIAL COOPERATION GROUP
    Inventors: Ji Hwan Choi, Hyuckjae Lee, Dongwook Lee, Hyunseok Lee, Youngwoo Youn, Jungeun Kim
  • Publication number: 20080106382
    Abstract: A bi-slot tree based tag identification method in RFID systems includes (a) transmitting an inquiry of (n?1) bits to each tag at the reader; (b) deciding whether the inquiry of (n?1) bits are identical with first (n?1) bits of each tag ID when receiving the inquiry of (n?1) bits at each tag within a readable range of the reader; (c) transmitting each tag ID by one bit from (n+1)th bit to last bit thereof to the reader through different time slots based on nth bit value of each tag ID at the tags whose first (n?1) bits are identical with the inquiry of (n?1) bits; and (d) at the reader, checking whether there is a collision among the tag IDs received from the tags and identifying each tag ID of the tags based on the check result.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 8, 2008
    Applicant: RESEARCH AND INDUSTRIAL COOPERATION GROUP
    Inventors: Ji Hwan Choi, Hyuckjae Lee, Dongwook Lee, Hyoungsuk Jeon, Hoiyoon Jung
  • Publication number: 20080089446
    Abstract: A method and apparatus for detecting a signal in a communication system using at least two transmit antennas are provided. The signal detection method and apparatus includes selecting a symbol corresponding to a lowest branch metric from among symbols, the number of which corresponds to a modulation scheme, determining a candidate symbol by extending a process of selecting a symbol corresponding to a lowest branch metric from among the selected symbols, to a number which is less by one than the number of the transmit antennas, setting an accumulated branch metric of the candidate symbol as a threshold, removing a symbol having an accumulated branch metric higher than the threshold, and selecting, as a last received symbol, a symbol corresponding to a path having the lowest accumulated branch metric among paths selected without being removed until a last stage.
    Type: Application
    Filed: October 12, 2007
    Publication date: April 17, 2008
    Applicants: SAMSUNG ELECTRONICS CO. LTD., Information and Communications University Research and Industrial Cooperation Group
    Inventors: Joo-Hyun LEE, Sang-Boh YUN, Young-Hoon KWON, Sung-Soo HWANG, Jong-In KIM, Hyun-Cheol PARK, Hyoun-Kuk KIM, Ki-Hwan JEON
  • Publication number: 20080049375
    Abstract: Provided are a tunable inter-digital capacitor (IDC) and a method of manufacturing the same. The tunable IDC includes: a first dielectric layer formed on a substrate and having electrode pattern grooves of an IDC including a ground line and a signal line formed therein; electrode metal patterns formed in the electrode pattern grooves of the IDC including the ground line and the signal line formed in the first dielectric layer; and a second dielectric layer formed on an upper surface of the first dielectric layer to cover all of the electrode metal patterns except for parts of the ground and signal lines. Therefore, it is possible to increase tunability of the IDC and reduce drive voltage.
    Type: Application
    Filed: April 24, 2007
    Publication date: February 28, 2008
    Applicant: Research and Industrial Cooperation Group
    Inventor: Young Chul Lee
  • Publication number: 20080024223
    Abstract: A circuit for improving amplification and noise characteristics of a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and a frequency mixer, an amplifier and an oscillator using the circuit are provided. A gate terminal of the MOSFET is connected to a body terminal of the MOSFET through a capacitor and the gate and body terminals of the MOSFET are connected to a current source to simultaneously provide a signal to both the gate terminal and the body terminal, in order to improve amplification and noise characteristics of the MOSFET. As a result, a higher level of amplification and a lower level of noise than the conventional art can be obtained.
    Type: Application
    Filed: January 10, 2007
    Publication date: January 31, 2008
    Applicant: Research and Industrial Cooperation Group
    Inventors: Chul Soon Park, Ho Suk Kang
  • Publication number: 20080018503
    Abstract: A method and an apparatus for encoding and playing multimedia contents are provided. The method includes: separating media data and metadata from the multimedia contents; creating multimedia application format (MAF) metadata by using the separated metadata, the format of the MAF metadata being predetermined; and encoding the media data and the MAF metadata to generate an MAF file including a header, the MAF metadata, and the media data, the header having information that provides a location of the media data. Accordingly, in a process of integrating digital photos and other multimedia content files into one file in the application file format MAF, visual feature information obtained from photo data and the contents of the photo images, and a variety of hint feature information for effective indexing of photos are included as metadata and content application method tools based on the metadata are included.
    Type: Application
    Filed: July 20, 2006
    Publication date: January 24, 2008
    Applicants: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & INDUSTRIAL COOPERATION GROUP
    Inventors: Sangkyun Kim, Jiyeun Kim, Yongman Ro, Seungji Yang
  • Patent number: 7319366
    Abstract: A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic signal having a frequency which is two-thirds of the local oscillation frequency, a poly-phase filter converting the differential second-harmonic signal input from the quadrature voltage controlled oscillator into I and Q signals, and a single side band (SSB) mixer receiving the I and Q signals having the frequency which is one-third of the local oscillation frequency from the quadrature voltage controlled oscillator as an input and receiving the I and Q signals having the frequency which is two-thirds of the local oscillation frequency from the poly-phase filter as an input, and outputting the I and Q signals having the local oscillation frequency.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: January 15, 2008
    Assignee: Research and Industrial Cooperation Group
    Inventors: Nam-Jin Oh, Sang-Gug Lee
  • Publication number: 20070291882
    Abstract: A signal detection apparatus and method using a modified stack algorithm in a Multi-Input Multi-Output (MIMO) system are provided. The signal detection method includes sorting signals received via antennas and channel coefficients for respective users in descending order, decomposing a channel matrix composed of the sorted channel coefficients into a unitary matrix and an upper-triangular matrix, determining the number of candidate symbol-sequences using the decomposed upper-triangular matrix, obtaining a signal vector for the antennas by using the sorted signals received via respective antennas and the unitary matrix, wherein the signal vector is proportional to the upper-triangular matrix, and detecting the determined number of candidate symbol-sequences by using a modified stack algorithm while expanding a stack structure for the obtained signal vector.
    Type: Application
    Filed: June 13, 2007
    Publication date: December 20, 2007
    Applicants: Samsung Electronics Co., LTD., Research and Industrial Cooperation Group
    Inventors: Sung-Woo Park, Joo-Hyun Lee, Kyung-Joo Suh, Young-Hoon Kwon, Sung-Soo Hwang, Jong-In Kim, Joon-Hyuk Kang, Jong-Sub Cha
  • Patent number: 7304548
    Abstract: A differential voltage controlled oscillator comprises first and second transistors having opposite magnitudes and directions of currents flowing to a third electrode from a second electrode corresponding to a voltage between first and second electrodes; and a resonance circuit coupled to the second electrodes of the first and second transistors and controlling a frequency of an oscillation signal corresponding to a control voltage. The second electrode of the first transistor is coupled to the first electrode of the second transistor to form a first output terminal, the first electrode of the first transistor is coupled to the second electrode of the second transistor to form a second output terminal, and the third electrodes of the first and second transistors are coupled to first and second powers.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: December 4, 2007
    Assignee: Information and Communications University Research and Industrial Cooperation Group
    Inventors: Sang Gug Lee, So Bong Shin, Seok Ju Yun
  • Publication number: 20070274339
    Abstract: A method for fairly allocating a differentiated bandwidth based on shared multicast traffic in transmission of downstream traffic in a Time Division Multiplexed-Passive Optical Network (TDM-PON) is provided.
    Type: Application
    Filed: January 10, 2007
    Publication date: November 29, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Nam-Uk Kim, Minho Kang
  • Publication number: 20070263569
    Abstract: An apparatus and method for lowering a tree searching complexity in a Spatial Multiplexing (SM) Multiple Input Multiple Output (MIMO) antenna system are provided. A transmitting apparatus includes a generator for generating a plurality of transmit streams by spatial-multiplexing a transmit data, a determiner for determining modulation schemes to be applied to the plurality of the transmit streams respectively and a modulator for modulating the plurality of the transmit streams using at least two modulation schemes under control of the determiner. The receiver detects the signals by allocating the modulation scheme of the lowest order to the upper tree level.
    Type: Application
    Filed: May 9, 2007
    Publication date: November 15, 2007
    Applicants: Samsung Electronics Co., LTD., Research and Industrial Cooperation Group
    Inventors: Soong-Yoon CHOI, Kyung-Joo Suh, Young-Hoon Kwon, Sung-Soo Hwang, Jong-In Kim, Yong-Seok Kim, Hyun-Cheol Park, Hyoun-Kuk Kim
  • Publication number: 20070247242
    Abstract: A quadrature voltage-controlled oscillator comprises a first delay cell outputting first and second phase signals having a different phase; and a second delay cell outputting third and fourth phase signals having a different phase, the third and fourth phase signals crossing the first and second phase signals, respectively. The first delay cell includes a first differential voltage-controlled oscillator connected to a power supply and outputting the first and second phase signals; and a first coupling section including first and second coupling transistors connected to the first differential voltage-controlled oscillator and first and second coupling capacitors connected in parallel to the first and second coupling transistors, respectively, so as to be grounded, the first coupling section coupling the output phase signals.
    Type: Application
    Filed: April 9, 2007
    Publication date: October 25, 2007
    Applicants: SAMSUNG ELECTRO-MECHANICS CO., LTD., RESEARCH AND INDUSTRIAL COOPERATION GROUP
    Inventors: Jeong Hoon KIM, Sang-Gug LEE, Nam-Jin OH, Seok-Ju YUN, Eung Ju KIM, Tah Joon PARK
  • Publication number: 20070242691
    Abstract: An apparatus and method for transferring optical data in an optical switching system are provided. When optical data input to a node are in contention, the optical data are converted from optical signals to electrical signals and temporarily stored. When an output resource is available, the stored optical data are converted to the available output resource and transmitted to a desired destination node. This overcomes the buffering depth limit that is observed when a conventional optical fiber delay line is used. Accordingly, an optical data loss rate can be reduced such that optical data can be efficiently transferred. Further, non-contending optical data are directly delivered to output resource by the switching unit, thereby reducing the cost of optical/electrical conversion and wavelength conversion and enabling the apparatus to be implemented at low cost.
    Type: Application
    Filed: January 9, 2007
    Publication date: October 18, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: June Koo Rhee, Jung Yul Choi, Ji Hwan Kim, Min Ho Kang
  • Publication number: 20070189285
    Abstract: An apparatus and method for transferring data bursts in an optical burst switching network are provided.
    Type: Application
    Filed: July 31, 2006
    Publication date: August 16, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Jung Yul Choi, Min Ho Kang
  • Publication number: 20070177588
    Abstract: Provided is a method for transmitting a burst in an optical burst switching system, in which when a burst is generated at an originating node, a burst control packet is transmitted to a destination node by way of a plurality of nodes and then a data burst is transmitted after a pre-allocated offset time. The method includes the steps of obtaining an arrival time of data bursts that survive competition to occupy an output channel among data bursts transmitted to the next node by way of the current node using offset time information in burst control packets for the survived data bursts, checking whether an empty void is present between the survived data bursts by using the obtained arrival time of the survived data bursts, and generating a new data burst originating from the current node, inserting the newly generated data burst into the checked empty void, and transmitting to the next node. This method can improve channel utilization and maximize performance of the optical burst switching system.
    Type: Application
    Filed: April 24, 2006
    Publication date: August 2, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Seoung Lee, In Hwang, Hong Park
  • Publication number: 20070177871
    Abstract: Provided is a method for transmitting a burst using wavelength separation in an optical burst switching system, in which a plurality of nodes form a mesh network. The method includes the steps of generating, at a current node, a several hop going (SHG) burst arriving at a destination node by way of a plurality of nodes, allocating the generated SHG burst to a dedicated wavelength group to prevent the generated SHG burst from colliding with SHG bursts generated from previous nodes, and delivering the SHG burst to a next node, checking offset times of the SHG bursts generated from the previous nodes and classifying the SHG bursts according to the offset times, and allocating the SHG bursts separated according to the offset times to different wavelength groups and transmitting the SHG bursts to the next node. Using this method, it is possible to solve a problem of unfair competition among bursts according to the number of nodes that the bursts should transit in the optical burst switching system.
    Type: Application
    Filed: April 24, 2006
    Publication date: August 2, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Seoung Lee, In Hwang, Hong Park
  • Publication number: 20070173218
    Abstract: A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic signal having a frequency which is two-thirds of the local oscillation frequency, a poly-phase filter converting the differential second-harmonic signal input from the quadrature voltage controlled oscillator into I and Q signals, and a single side band (SSB) mixer receiving the I and Q signals having the frequency which is one-third of the local oscillation frequency from the quadrature voltage controlled oscillator as an input and receiving the I and Q signals having the frequency which is two-thirds of the local oscillation frequency from the poly-phase filter as an input, and outputting the I and Q signals having the local oscillation frequency.
    Type: Application
    Filed: April 24, 2006
    Publication date: July 26, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Nam-Jin Oh, Sang-Gug Lee
  • Publication number: 20070116277
    Abstract: Disclosed is a system and method for encryption of a scalable video coding (SVC) bitstream, which is the next-generation coding technology. The encryption method encrypts Nation Adaptation Layer (NAL) data identified according to multidimensional scalability for space, time, and quality with respect to a bitstream created after an SVC encoding, thereby providing a multidimensional scalability function for space, time, and quality even after the encryption, so that the scalability is also maintained even in a bitstream extraction process after the encryption. According to such a scalable encryption method, a specific portion of an encrypted bitstream is removed in a bitstream extraction process, and user access to the bitstream is limited based on a combination of keys for accessing a specific scalability. Therefore, it is possible to protect scalable video content and to access the video content based on scalabilities.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 24, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Research and Industrial Cooperation Group
    Inventors: Yong-Man Ro, Yong-Geun Won, Tae-Meon Bae
  • Publication number: 20070086664
    Abstract: A method and an apparatus for encoding multimedia contents, and a method and a system for applying multimedia contents are provided. The method for applying multimedia contents includes: storing an MAF file in a database, the MAF file including a header with location information that provides the location of media data, at least one single track with media data and metadata compatible with a predetermined standard, utilization data representing information for media application method; and browsing or sharing the MAF file stored in the database. The media metadata compatible with the predetermined standard is at least one of media player metadata and a media album metadata. Accordingly, even when the user does not have a specific application or a function for applying metadata, general-purpose multimedia content files can be effectively used by effectively browsing or sharing the multimedia content files.
    Type: Application
    Filed: July 20, 2006
    Publication date: April 19, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & INDUSTRIAL COOPERATION GROUP
    Inventors: Sangkyun Kim, Jiyeun Kim, Youngsu Moon, Yongman Ro, Seungji Yang
  • Publication number: 20070086665
    Abstract: A method and an apparatus for encoding multimedia contents, and a method and a system for applying multimedia contents are provided. The method for applying multimedia contents includes: storing an MAF file in a database, the MAF file including a header with location information that provides the location of media data, at least one single track with media data and metadata compatible with a predetermined standard, utilization data representing information for media application method; and browsing or sharing the MAF file stored in the database. The media metadata compatible with the predetermined standard is at least one of media player metadata and a media album metadata. Accordingly, even when the user does not have a specific application or a function for applying metadata, general-purpose multimedia content files can be effectively used by effectively browsing or sharing the multimedia content files.
    Type: Application
    Filed: July 20, 2006
    Publication date: April 19, 2007
    Applicants: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & INDUSTRIAL COOPERATION GROUP
    Inventors: Sangkyun Kim, Jiyeun Kim, Youngsu Moon, Yongman Ro, Seungil Yang