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Hyuncheol
Hyuncheol Jeong, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20100154057 | SIP INTRUSION DETECTION AND RESPONSE ARCHITECTURE FOR PROTECTING SIP-BASED SERVICES - The present invention relates to a Session Initiation Protocol (SIP) intrusion detection and response architecture for protecting SIP-based services, and more specifically, to an SIP intrusion detection and response architecture for protecting SIP-based services, in which SIP-based attacks of a new type can be coped with by detecting the SIP-based attacks and SIP traffic anomalies and managing an SIP-aware security device without degrading quality of multimedia, and signal and media channels can be examined through an SIP-aware intrusion prevention system (IPS) for the purpose of preventing an attacker from hindering a call through manipulation of an SIP message and session-hijacking among legitimate users and attempting a toll fraud by detouring authentication. | 06-17-2010 |
Hyuncheol Jeong, Gamdang-Ri KR
| Patent application number | Description | Published |
|---|---|---|
| 20100140603 | BLUE LIGHT EMITTING COMPOUND AND ORGANIC LIGHT EMITTING DIODE DEVICE COMPRISING THE SAME - A blue light emitting compound is provided. The blue light emitting compound has a structure of the following Chemical Formula 1: | 06-10-2010 |
Hyuncheol Park, Daejeon KR
| Patent application number | Description | Published |
|---|---|---|
| 20080260381 | COMMUNICATION APPARATUS USING CHAOTIC SIGNAL AND METHOD THEREOF - A communication apparatus using a chaotic signal and a method thereof are provided. The communication apparatus includes a correlator which multiplies source data by one of an optical orthogonal code (OOC) and a prime sequence code (PSC), and outputs transmission data, a transmission signal generating unit which generates a chaotic transmission signal by masking the transmission data with respect to a chaotic signal, and an antenna which transmits the chaotic transmission signal. As a result, multiple accesses are enabled, and a wireless communication system for short-distance operation, which is economic and low power-consuming, is provided. | 10-23-2008 |
| 20090154458 | REPETITION APPARATUS AND METHOD FOR REPEATEDLY TRANSMITTING AND RECEIVING DATA PACKET USING DIFFERENT PUNCTURING PATTERNS - Provided are repetition apparatus and method for repeatedly transmitting and receiving a data packet using different puncturing patterns to overcome signal attenuation and fading in a high speed mobile environment by repeatedly transmitting the duplicated information bit sequences with parity bits having a different puncturing pattern after channel-encoding the duplicated information bit. The repetition apparatus for repeatedly transmitting a data packet, includes a dual data generator for generating duplicated information bit sequences identical to each of information bit sequences to transmit, a channel encoder for dividing each of the duplicated information bit sequences into a plurality of information bits, and generating coded data packets alternately having a plurality of parity bits according to different puncturing patterns for each of the divided information bits, and a transmitter for transmitting the generated coded data packets sequentially. | 06-18-2009 |
Hyuncheol Park, Yongin-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20080292030 | APPARATUS AND METHOD FOR DECODING SPACE-TIME BLOCK CODED (STBC) SIGNAL - Apparatus and method for decoding a Space-Time Block Coded (STBC) signal. The decoding apparatus includes a channel estimator for estimating a real equivalent channel based on a coded signal; a channel converter for decomposing the real equivalent channel to a unit matrix and a subchannel; a receive signal converter for converting the coded signal to a real equivalent receive signal and converting the real equivalent receive signal to a converted receive signal based on the unit matrix; and a detector for detecting an estimate of a transmit signal by performing a maximum likelihood decoding using the converted receive signal and the subchannel. Since the transmit signal candidates are independent of each other, the complexity of the maximum likelihood decoding can be decreased. With the lowered complexity of the receiver, the power consumption for the decoding can be reduced and the high-speed data can be transmitted more easily in the actual mobile communication environment. | 11-27-2008 |