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Ihm, KR
Bin Chnl Ihm, Anyang-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20110274205 | METHOD FOR TRANSMITTING REFERENCE SIGNAL IN DOWNLINK MULTI-INPUT MULTI-OUTPUT SYSTEM - Provided is a method for transmitting a reference signal (RS) in a downlink multi-input multi-output (MIMO) system which supports a first user equipment (UE) for supporting N transmission antennas from among a total of M transmitting antennas and a second UE for supporting M transmitting antennas (wherein, M>N). The method comprises the steps of: generating a subframe for simultaneously supporting the first UE and the second UE at a base station; transmitting the subframe; and mapping a common reference signal (CRS) for antenna port 0 to antenna port N−1, mapping a CRS for antenna port N to antenna port M−1, and controlling a power level of a CRS for antenna port 0 to antenna port N−1 and a power level of CRS for antenna port N to antenna port M−1, independently from one another, at the subframe. | 11-10-2011 |
Bin Chui Ihm, Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20120076102 | METHOD AND APPARATUS FOR ACQUIRING ANTENNA INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and apparatus for acquiring antenna information. According to the present invention, a method in which user equipment acquires information of a transmission antenna of an eNB comprises the steps of: receiving a physical broadcast channel (PBCH) including information which indicates whether or not the eNB supports an extended transmission antenna configuration; decoding the received physical broadcast channel, and checking the transmission modes of the physical broadcast channel; and acquiring information of the transmission antenna of the eNB from one or more of the transmission modes checked in the previous step and information which indicates whether or not the eNB supports an extended transmission antenna configuration. | 03-29-2012 |
Bin Chui Ihm, Anyang-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20090215480 | Method for reducing inter-cell interference - A method for reducing inter-cell interference and a method for transmitting a signal by a collaborative MIMO scheme, in a communication system having a multi-cell environment are disclosed. An example of a method for transmitting, by a mobile station, precoding information in a collaborative MIMO communication system includes determining a precoding matrix set including precoding matrices of one more base stations including a serving base station, based on signal strength of the serving base station, and transmitting information about the precoding matrix set to the serving base station. A mobile station in an edge of a cell performs a collaborative MIMO mode or inter-cell interference mitigation mode using the information about the precoding matrix set collaboratively with neighboring base stations. | 08-27-2009 |
Binchul Ihm, Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20120069887 | Method of Minimizing Feedback Overhead Using Spatial Channel Covariance in a Multi-Input Multi-Output System - Disclosed is a method for minimizing feedback overhead in a multi-input multi-output (MIMO) communication method using multiple transmission and reception antennas. In particular, a method for minimizing feedback overhead in a multi-input multi-output (MIMO) communication system by using spatial channel covariance, as explicit channel status information (CSI) feedback method is disclosed. | 03-22-2012 |
| 20120069926 | METHOD OF GENERATING CODEBOOK AND TRANSMITTING DATA IN A MULTI-INPUT MULTI-OUTPUT SYSTEM - A method for designing an optimized codebook in a multi-input multi-output communication method using various codebooks is disclosed. In particular, an optimized codebook with respect to eight transmission antennas is devised, and a method for effectively transmitting data by using the optimized codebook is disclosed. | 03-22-2012 |
Bin Chul Ihm, Anyang-Shi KR
| Patent application number | Description | Published |
|---|---|---|
| 20100149961 | METHOD OFTRANSMITTING AND PROCESSING DATA AND TRANSMITTER IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting/processing data in a wireless communication system, and a transmitter are disclosed. A method processing method for data transmission at a transmitting side of a wireless communication system employing multiple carriers comprises performing a symbol mapping process on a binary data sequence, and generating a symbol sequence, converting the symbol sequence into a time-domain symbol using a plurality of sub-carriers having a variable sub-carrier spacing therebetween, and adding a cyclic prefix to the time-domain symbol. | 06-17-2010 |
Bin Chul Ihm, Gyeonggni-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20080280619 | Method for Transmitting Information in a Multiple Antenna System - A method of transmitting and receiving information in a wireless mobile communication system where a mobile station (MS) has at least one antenna is disclosed. More specifically, the method discloses transmitting information to a base station (BS). Here, the information includes the number of antennas to be used for transmission by the MS and whether the MS supports a collaborative spatial multiplexing (SM) scheme. Furthermore, the method discloses receiving information from the BS. Here, the information includes the number of antennas that can be used by the MS for transmission and a multi-input multi-output (MIMO) matrix to be used by each antenna of the MS. | 11-13-2008 |
Bin Chul Ihm, Ansan-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100074309 | PHASE SHIFT BASED PRECODING METHOD AND TRANSCEIVER FOR SUPPORTING THE SAME - A method of transmitting data using a generalized phase shift based precoding or an extended phase shift precoding scheme in a multiple-antenna system using a plurality of subcarrier and a transceiver for supporting the same are disclosed. A phase shift based precoding matrix may be generalized and determined by a product of a diagonal matrix for phase shift and a unitary matrix for maintaining orthogonality in spatial domain. The diagonal matrix may be extended by a product of a precoding matrix for increasing channel power and the diagonal matrix for phase shift. The design of the transceiver can be simplified or communication efficiency can be improved by generalizing and extending the phase shift based precoding. | 03-25-2010 |
Bin Chul Ihm, Anyang-Si Gyeongki-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20110002309 | METHOD OF TRANSMITTING ACK/NACK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting an acknowledgement (ACK)/non-acknowledgement (NACK) signal in a wireless communication system is provided. The method includes: allocating a radio resource; and transmitting the ACK/NACK signal through an ACK channel in a location determined by an index for the radio resource, wherein the radio resource includes at least one resource unit which is a basic unit for resource allocation, the resource unit is at least one of a localized resource unit including subcarriers contiguous in a frequency domain and a distributed resource unit including subcarriers distributed in the frequency domain, an index of the localized resource unit is directly mapped to an index of the ACK channel, and an index of the distributed resource unit is mapped to an index of the ACK channel according to a permutation rule. | 01-06-2011 |
| 20110149942 | Method of Transmitting Data in Multiple Antenna System - A method of transmitting data in a multiple antenna system includes transmitting first data through a first pilot pattern zone in which pilots are arranged in a specific pilot pattern in a permutation zone having at least one tile comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols and a plurality of subcarriers, and transmitting second data through a second pilot pattern zone in which pilots are arranged in another pilot pattern different from the pilot pattern of the first pilot pattern zone in the permutation zone. Accordingly, a plurality of pilot patterns can be simultaneously used in one permutation zone, and thus waste of radio resources caused by the use of unnecessary pilots can be reduced by adaptively assigning pilots according to various channel environments and performances of user equipments. | 06-23-2011 |
Bin Chul Ihm, Anyang-Si Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20110019635 | METHOD FOR TRANSMITTING AND RECEIVING DATA USING PILOT STRUCTURE - A method for efficiently transmitting and receiving data in a wireless access system and a pilot allocation structure for the same are provided. In one aspect of the present invention, a method for transmitting and receiving data in a wireless access system, the method including transmitting data using a resource block constructed taking into consideration channel estimation capabilities and data transfer rate, and receiving data using the resource block. Here, the resource block may have a 6×6 structure constructed with 6 OFDM symbols and 6 subcarriers, and one or more first pilot symbols may be allocated to prescribed OFDM symbols of a first subcarrier and a fifth subcarrier of the resource block. Moreover, the first pilot symbols may be allocated to the resource block at a predetermined allocation rate taking into consideration a number of transmit antennas. | 01-27-2011 |
| 20110149897 | BANDWIDTH REQUEST METHOD AND BANDWIDTH ALLOCATION METHOD IN BROADBAND WIRELESS ACCESS SYSTEM - The present invention deals with a method for requesting and allocating an uplink resource efficiently in a broadband wireless access system. The method of the present invention wherein a terminal requests bandwidth in a broadband wireless access system may include a step in which a bandwidth request header (BR header), including a bandwidth request message and a high-speed access message, is transmitted to a base station; a step in which uplink grant (UL grant) information corresponding to the information included in said bandwidth request message and said high-speed access message is received from said base station; and a step in which the uplink resource indicated by said uplink grant information is used to transmit data to said base station. | 06-23-2011 |
Bin-Chul Ihm, Anyang KR
| Patent application number | Description | Published |
|---|---|---|
| 20080298315 | Method of Transmitting and Receiving Information of Allocating Uplink Region in Broadband Wireless Access - A method of receiving the uplink region allocation information is disclosed. In a broadband wireless access system, in which a mobile terminal receives uplink region allocation information, the present invention includes the steps of receiving an uplink map message from which an uplink map information element (UL-MAP IE) for a ranging region or an uplink bandwidth request region is omitted from a base station and receiving information for a region for a ranging region or uplink bandwidth request using a message periodically transmitted for a control information transmission for an uplink channel. By transmitting uplink region allocation information via a periodically transmitted message, the uplink region allocation information can be efficiently transmitted. | 12-04-2008 |
| 20090257395 | CQICH ALLOCATION REQUEST HEADER FOR COMMUNICATING FEEDBACK INFORMATION - A method of communicating feedback information between a mobile station and a base station comprises determining a need to request bandwidth allocation; providing information to a base station according to the determining, wherein the information indicates bandwidth allocation for a fast feedback channel; and performing communication with the base station upon bandwidth allocation according to the provided information. | 10-15-2009 |
| 20110122848 | METHOD OF TRANSMITTING AND RECEIVING INFORMATION OF ALLOCATING UPLINK REGION IN BROADBAND WIRELESS ACCESS SYSTEM - A method of receiving the uplink region avocation information is disclosed. In a broadband wireless access system, in which a mobile terminal receives uplink region allocation information, the present invention includes the steps of receiving an uplink map message from which an uplink map information element (UL-MAP IE) for a ranging region or an uplink bandwidth request region is omitted from a base station and receiving information for a region for a ranging region or uplink bandwidth request using a message periodically transmitted for a control information transmission for an uplink channel. By transmitting uplink region allocation information via a periodically transmitted message, the uplink region allocation information can be efficiently transmitted. | 05-26-2011 |
| 20120014340 | CQICH ALLOCATION REQUEST HEADER FOR COMMUNICATING FEEDBACK INFORMATION - A method of communicating feedback information between a mobile station and a base station comprises determining a need to request bandwidth allocation; providing information to a base station according to the determining, wherein the information indicates bandwidth allocation for a fast feedback channel; and performing communication with the base station upon bandwidth allocation according to the provided information. | 01-19-2012 |
Chul Bin Ihm, Gyeongki-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20090274235 | Data transmission method using dirty paper coding in mimo system - A data transmission method for multiple users having multiple receive antennas is provided. The method includes selecting a receive antenna among the multiple receive antennas for each user, performing DPC (Dirty Paper Coding) from the multiple transmit antennas to the receive antenna and transmitting a transmission signal on which the DPC is performed. Since DPC is implemented through a receive antenna selected among multiple receive antennas, complexity is not much increased although the DPC is applied to a MIMO system. | 11-05-2009 |
Jongtae Ihm, Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20080238764 | Method and System for Determining Position of Terminal by Using Gps Terminal and Location Detector in Gps Satellite-Invisible Area - The method for finding location of a GPS terminal in a GPS satellite-invisible area by using a mapping server including the mobile terminal, a location detector, a PDE, and a database, comprising: (a) obtaining a reference pilot signal of a base station or a repeater and a LD pilot signal from the location detector; (b) transmitting information on the reference pilot signal or the LD pilot signal to the PDE, if a strength of the reference pilot signal or the LD pilot signal is determined to be larger than a prescribed value; (c) calculating a pseudo noise code phase value per chip from the PSMM; (d) transmitting the pseudo noise code phase value to the LD mapping server, if the pseudo noise code phase value calculated at step (c) is determined to be a pseudo noise code phase value served for a location detection; and (c) obtaining a location information of the GPS terminal by using the pseudo noise code phase value transmitted at step (d). | 10-02-2008 |
| 20090023449 | METHOD AND SYSTEM FOR PERFORMING HANDOVER OF MULTIMODE-MULTIBAND TERMINAL BY USING MULTI TARGET CELL IN MOBILE COMMUNICATION ENVIRONMENT - Disclosed are a method and a system for performing handover of a multimode-multiband terminal by using multi-target cells in a mobile communication environment. The method for performing handover of a multimode-multiband terminal using multi-target cells in a mobile communication environment, which increases a probability of handover and improves communication quality by using the multi-target cells in a mobile communication system including a CDMA- | 01-22-2009 |
| 20090098891 | METHOD AND SYSTEM FOR RING BACK TONE ALTERNATIVE SERVICE BASED ON TERMINAL AND MOBILE COMMUNICATION TERMINAL THEREFOR - Disclosed is a method and a system for providing a terminal-based ringback tone substitute service, as well as a mobile communication terminal for the same. The method includes the steps of (a) receiving a request for an originating call for voice communication with a called terminal from a calling terminal; (b) transmitting a ringback tone start message to the calling terminal, the ringback tone start message being a control message informative of beginning of a ringback tone section; (c) paging the called terminal; (d) transmitting a ringback tone termination message to the calling terminal, the ringback tone termination message being a control message informative of ending of the ringback tone section, and connecting the voice communication between the calling terminal and the called terminal when a response to paging is received from the called terminal; and (e) transmitting the ringback tone termination message to the calling terminal and transmitting unanswered messages to the calling terminal when no response to the paging is received from the called terminal. The mobile communication terminal can play a high-quality ringback tone substitute without being affected by the voice channel environment. | 04-16-2009 |
| 20100062792 | METHOD AND SYSTEM FOR PROVIDING LOCATION MEASUREMENT OF NETWORK BASED TO MOBILE COMMUNICATION TERMINAL BY USING G-PCELL DATABASE - Disclosed are a method and a system for providing a mobile communication terminal with network-based location measurement by using a G-pCell database. The method and system are advantageous in that, when a mobile communication system employs a network-based location measurement scheme, the influence of repeaters is reduced to improve the positioning stability and measurement accuracy and provide more stable location-based services. | 03-11-2010 |
| 20100214975 | FAST DATA-LINK CONNECTION METHOD FOR SAVING CONNECTION TIME IN CDMA 2000 NETWORK - Disclosed herein is a fast data call connection method capable of reducing a connection time and increasing the probability of connection success in a CDMA 2000 network. | 08-26-2010 |
Jong-Tae Ihm, Seongnam-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100091736 | SYSTEM FOR PACKET DATA SERVICE IN THE MIXED NETWORK OF ASYNCHRONOUS COMMUNICATION NETWORK AND SYNCHRONOUS COMMUNICATION NETWORK AND HAND-OVER METHOD THEREOF - Disclosed herein is a mobile communication terminal and handover method therefor, which enable handover of a mobile communication terminal that is using a packet data service or is in a dormant state in a mobile communication network in which asynchronous and synchronous networks coexist. In the handover method, if a channel is assigned between a mobile communication terminal and a synchronous mobile communication system in response to a request from an asynchronous mobile communication system as a mobile communication terminal using packet data service in the asynchronous mobile communication system moves into an area of the synchronous mobile communication system, call setup is performed. A node B of the asynchronous communication releases a connection to the mobile communication system and assigns a new mobile IP to the mobile communication terminal, thus providing continuous packet data service to the mobile communication terminal. | 04-15-2010 |
Sam-Ho Ihm, Suwon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20090121995 | LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME - A liquid crystal display (LCD) and method for driving the LCD using one or more polarity inversion methods is provided. In one embodiment, the invention relates to a method of driving an LCD comprising a liquid crystal panel partitioned by a plurality of gate lines and data lines and including a plurality of liquid crystal cells arranged in a matrix and auxiliary lines adjacent to and parallel to the gate lines, the auxiliary lines coupled with the plurality of liquid crystal cells, the method including supplying an auxiliary voltage that increases from a low level to a high level on a first pair of auxiliary lines adjacent to each other for a jth frame period, supplying an auxiliary voltage that decreases from a high level to a low level on a second pair of auxiliary lines adjacent to each other for the jth frame period, supplying the auxiliary voltages at levels opposite to the levels of the jth frame period on the first and second pairs of auxiliary lines in a (j+1)th frame period. | 05-14-2009 |
Sam-Ho Ihm, Yongin-City KR
| Patent application number | Description | Published |
|---|---|---|
| 20110032459 | LIQUID CRYSTAL DISPLAY - A liquid crystal display is disclosed. In one embodiment, the display includes i) a lower substrate comprising a lower transmissive region and a lower reflective region, wherein a reflecting layer is formed in the lower reflective region, and wherein the reflective layer has a lens shape which comprises a first concave portion and a first convex portion, ii) an upper substrate comprising an upper transmissive region and an upper reflective region, wherein a first overcoat layer is formed in the upper reflective region, and wherein the first overcoat layer has a lens shape which comprises a second concave portion and a second convex portion and iii) a liquid crystal layer positioned between the lower substrate and the upper substrate. | 02-10-2011 |
| 20110063551 | LIQUID CRYSTAL DISPLAY DEVICE - In a transflective type fringe field switching liquid crystal display device, the display device may comprise wires including a plurality of gate wirings and a plurality of data wirings providing electric signals to a plurality of pixel regions, wherein each of the pixel regions is partitioned into a transmission region and a reflection region and at least one first transparent electrode having a flat shape and formed in each of the pixel regions. The device may further include a plurality of second transparent electrodes formed over the first transparent electrode, a reflection plate formed on the first transparent electrode located in the reflection region; and a plurality of embossings formed on the reflection plate, wherein the center of each embossing is formed only on the reflection plate. | 03-17-2011 |