Patent application number | Description | Published |
20090021434 | METHOD OF CONTROLLING ANTENNA OF MOVING OBJECT AND SYSTEM USING THE SAME - A system of controlling an antenna of a moving object is provided. The system includes: a plurality of communication antennas established in the moving object; an environmental information generation unit generating environmental information which includes strength information of a received signal and moving speed information of the moving object; an antenna use determination unit determining, with respect to the plurality of communication antennas, a number of antennas for each use based on the environmental information; and an antenna assigning unit assigning the plurality of communication antennas for each use according to the determined number of antennas. | 01-22-2009 |
20090052512 | LINK ADAPTATION SYSTEM USING DOPPLER FREQUENCY AND METHOD USING THE SAME - A link adaptation system using a Doppler frequency is provided. The link adaptation system includes: a Doppler frequency estimation unit to estimate a Doppler frequency of a signal transmitted via a wireless channel; a Signal to Noise Ratio (SNR) measurement interval determination unit to determine an SNR measurement interval of the signal transmitted via the wireless channel based on the estimated Doppler frequency; and an SNR measurement unit to measure an SNR of the signal based on the determined SNR measurement interval. | 02-26-2009 |
20090059805 | BASE STATION AND MOBILE STATION FOR PROCESSING WIRELESS COMMUNICATION WITH EACH OTHER, AND METHOD FOR CONTROLLING THE SAME - A base station and a mobile station for processing wireless communication with each other, and a method for controlling the same are provided. The method for controlling a base station which performs radio communication with a mobile station includes starting radio communication via at least one arbitrary mobile station and a predetermined cellular channel; receiving Channel Quality Indication (CQI) information from the mobile station; determining whether a radio communication anomaly occurs between a specific mobile station from among the at least one arbitrary mobile station and the base station by using the received CQI information; and when determining that the radio communication anomaly occurs with the specific mobile station, controlling to interrupt the radio communication via the predetermined cellular channel and perform radio communication via the specific mobile station and either a shared channel or an open channel. | 03-05-2009 |
20090061783 | ACCESS POINT, MOBILE STATION FOR WIRELESS COMMUNICATION SYSTEM, AND METHOD FOR CONTROLLING THE SAME - An access point (AP) and a mobile station in a wireless communication system and a method of controlling the same are provided. A method of controlling an AP in a wireless communication system includes: determining whether a transmission of a control message is needed; transmitting the control message via a first frequency band when the transmission of the control message is needed; determining whether a transmission of a data message is needed; and transmitting the data message via a second frequency band when the transmission of the data message is needed | 03-05-2009 |
20090077241 | METHOD OF FORWARDING/SHARING SERVICE AND DEVICE OF ENABLING THE METHOD - A terminal apparatus for forwarding/sharing a data service is provided. The terminal apparatus for forwarding/sharing the data service includes a service receiver to receive the data service from a service provision apparatus; a connector to perform a connection with a corresponding terminal; and a service forwarding unit to forward the data service to the corresponding terminal via the connection with the corresponding terminal | 03-19-2009 |
20090082057 | COGNITIVE RADIO TERMINAL DEVICE AND METHOD OF COMMUNICATING USING COGNITIVE RADIO - A cognitive radio terminal device. The cognitive radio terminal device comprises an available radio resource determination unit to determine an available radio resource from among up-link radio resources assigned to an up-link communication in a primary network, and an ad hoc communication performing unit to perform an ad hoc communication in a secondary network by using the available radio resource. | 03-26-2009 |
20090092185 | PORTABLE DEVICE FOR PROCESSING MULTIMEDIA SIGNAL AND METHOD USING THE SAME - A portable device for processing a multimedia signal is provided. The portable device includes: a signal receiver to receive a multimedia signal from a mobile terminal, the multimedia signal being received in the mobile terminal from a service providing server; a decoding-related information generation unit to generate decoding-related information which is related to at least one of a codec and a resolution; a decoder to decode the multimedia signal according to the decoding-related information, and to generate multimedia information; and a multimedia information transmitter to transmit the multimedia information to an external display device. | 04-09-2009 |
20100008381 | APPARATUS FOR REPORTING RECEPTION RESULT OF PACKETS IN MOBILE COMMUNICATION SYSTEM - Disclosed is a receiver for configuring a Block Acknowledgement (BA) frame in a wireless communication system for acknowledgement of a data transmission from a transmitter. The receiver receives a Block Acknowledgement Request (BAR) frame in the data transmission from the transmitter and determines an overall size of a bitmap for the BA frame from the BAR frame to acknowledge the data transmission. The receiver configures the BA frame of the response to include the bitmap having the determined overall size, and transmits the configured BA frame to the transmitter. The bitmap of the BA frame includes bits representing reception results of packets of the data transmission received from the transmitter. | 01-14-2010 |
20100179307 | BIOMAKER COMPOSITION FOR DETECTING DIABETIC RETINOPATHY AND DIAGNOSTIC KIT THEREFOR - The present invention provides a biomarker composition for detecting diabetic retinopathy comprising at least one protein selected from the group consisting of proteins as set forth in SEQ ID NOS: 1 to 169. And also, the present invention provides a kit for diagnosing diabetic retinopathy, comprising a molecule specifically binding to at least one protein selected from the group consisting of proteins as set forth in SEQ ID NOS: 1 to 169. It has been newly found that 105 proteins as set forth in SEQ ID NOS: 1 to 105 are significantly over-expressed in the vitreous humors obtained from PDR patients, while 64 proteins as set forth in SEQ ID NOS: 106 to 169 are significantly over-expressed in those obtained from normal people. Therefore, the proteins can be used for biomarker capable of detecting diabetic retinopathy. The biomarker can provide fundamental information in researching vitreoretinal disorders, such as diabetic retinopathy. Especially, the newly found proteins may be applied to a kit for diagnosing diabetic retinopathy with a molecule specifically binding thereto, e.g., a monoclonal antibody. And also, it has been newly found that the levels of thyroxine-binding globulin precursor (TBG) in both vitreous and plasma of PDR and NPDR states and in plasma of diabetes mellitus state, are outstandingly higher than in non-diabetic control (MH or normal control). Therefore, TBG may be applied to a diabetes mellitus biomarker, and a kit for diagnosing diabetes mellitus with a molecule specifically binding thereto. | 07-15-2010 |
20100249800 | BI-PLANAR FLUOROSCOPY GUIDED ROBOT SYSTEM FOR A MINIMALLY INVASIVE SURGICAL AND THE CONTROL METHOD - Disclosed is a computer-integrated surgery aid system for minimally invasive surgery and a method for controlling the same. The system includes a surgery planning system for creating three-dimensional information from two-dimensional images obtained by means of biplanar fluoroscopy so that spinal surgery can be planned according to the image information and a scalar-type 6 degree-of-freedom surgery aid robot adapted to be either driven automatically or operated manually. | 09-30-2010 |
20110032911 | COGNITIVE RADIO COMMUNICATION APPARATUS AND RADIO ACCESS TECHNOLOGY SELECTION METHOD OF COGNITIVE RADIO COMMUNICATION APPARATUS - A Cognitive Radio (CR) communication apparatus is provided. The CR communication apparatus may include a determination unit to determine any one of a plurality of Radio Access Technologies (RATs) as a temporary control RAT, an estimation unit to estimate an available resource and a channel state of each common RAT using the temporary control RAT, and a selection unit to calculate an available capacity of each of the common RATs using the available resource and the channel state, and to select an optimum RAT from the common RATs based on the available capacity of each of the common RATs. The common RATs may be used by the CR communication apparatus and a receiving CR communication apparatus from among the plurality of RATs. | 02-10-2011 |
20110100006 | INTEGRATED PROCESS FOR WATER-HYDROGEN-ELECTRICITY NUCLEAR GAS-COOLED REACTOR - Disclosed herein is an integrated process for production of electricity, hydrogen, and water using a high-temperature gas-cooled reactor as a single source, including: the high-temperature gas-cooled reactor, a power conversion unit connected directly or indirectly with the high-temperature gas-cooled reactor to receive heat produced by a reactor core of the high-temperature gas-cooled reactor and drive a gas turbine by the heat, thereby producing electricity through an electric generator, a hydrogen production unit that produces hydrogen by receiving the heat produced by the high-temperature gas-cooled reactor and/or the electricity produced by the electric generator, an electrical desalination unit that produces water by using the electricity produced by the electric generator, and a thermal desalination unit that produces water by distilling fresh water from salt water with waste heat recovered from a precooler and an intercooler of the power conversion unit. | 05-05-2011 |
20110110443 | DATA RECEIVING APPARATUS FOR RECEIVING DATA FRAME USING CONSTELLATION MAPPING SCHEME AND DATA TRANSMISSION APPARATUS FOR TRANSMITTING THE DATA FRAME - Disclosed are a data receiving apparatus that may discriminate a type of a received data frame, and a data transmission apparatus that may apply a constellation mapping scheme to a data frame so that a data receiving apparatus may discriminate the data frame in accordance with the constellation mapping scheme applied to the data frame. | 05-12-2011 |
20110135023 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 06-09-2011 |
20110153748 | REMOTE FORENSICS SYSTEM BASED ON NETWORK - A remote forensics system based on a network is provided to allow for accessing a forensics analysis center from a remote area to perform forensic analysis. The network-based remote forensic system includes: one or more remote terminals performing forensic analysis on an evidence device in a remote area, through a virtual forensic tool when the evidence device is connected thereto; and an investigation center system connected to the remote terminals via a wide area network to provide the virtual forensic tool, processing a requirement of the remote terminals, and providing requirement processing results to the remote terminals. | 06-23-2011 |
20110170627 | METHOD FOR GENERATING PREAMBLE IN MULTI-USER MULTI-INPUT MULTI-OUTPUT SYSTEM, AND DATA TRANSMISSION APPARATUS AND USER TERMINAL USING THE METHOD - Provided are a method for generating a preamble included in a frame of a Multi-User Multi-Input Multi-Output (MU-MIMO) system, and a data transmission apparatus and terminal in which the method is adopted. The data transmission apparatus may enable at least one Very High Throughput-Long Training Field (VHT-LTF) sequence to be included in at least one Space Time Stream (STS) transmitted to at least one terminal, and transmits the at least one VHT-LTF sequence. The at least one VHT-LTF sequence may have the same length as another VHT-LTF sequence simultaneously transmitted. | 07-14-2011 |
20110222453 | COMMUNICATION METHOD OF A TRANSMISSION APPARATUS AND A RECEPTION APPARATUS - Provided is a communication method of a reception apparatus and a transmission apparatus that may decrease consumption of power by changing an operation state of a corresponding reception apparatus from an awake state to a sleep state when a stream to be transmitted is absent during all or a portion of a transmission opportunity (TXOP). | 09-15-2011 |
20110225440 | COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR POWER SAVING - Provided is a communication technology of an access point and a terminal that may decrease power consumption by changing an operation state of the terminal from an awake state to a sleep state when a data stream to be transmitted to the terminal is absent or has completed in a transmission opportunity (TXOP) duration. | 09-15-2011 |
20110243275 | APPARATUSES AND METHODS FOR DATA TRANSMISSION AND RECEPTION - Provided is a data transmission system of providing preambles of different classes according to a characteristic of a terminal. A terminal having constraints on using a power with respect to a data reception may receive only a preamble of a particular class and thus decrease a power consumption. A generally terminal may receive preambles of plural classes and quickly receive data. | 10-06-2011 |
20110249605 | COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR POWER SAVING - Provided is a communication method of an access point and a terminal that may decrease power consumption by changing an operation state of a terminal from an awake state to a sleep state when there is no stream to be transmitted to the terminal during a transmission opportunity (TXOP). | 10-13-2011 |
20110267971 | APPARATUS AND METHOD FOR COMMUNICATING DATA USING SEQUENTIAL RESPONSE PROTOCOL - Provided is a data communication method and apparatus based on a sequential response protocol that is applicable to a multiple user multiple input and multiple output (MU-MIMO) system. The data communication apparatus may include response indexes (RIs) with respect to multiple terminals in at least one spatio-temporal stream to be transmitted to the multiple terminals, and the response indexes may be information associated with a transmission sequence of data to be transmitted by the multiple terminals. | 11-03-2011 |
20120012176 | SOLAR CELL AND METHOD OF MANUFACTURING THE SAME - A solar cell includes a substrate, a doped pattern, a contact layer, and an electrode. The substrate includes a first surface onto which sunlight is incident and a second surface facing the first surface. The doped pattern is formed on the second surface of the substrate and the contact layer is formed on the doped pattern. The electrode is formed on the contact layer and is electrically connected to the doped pattern. Accordingly, a contact resistance between the substrate and the electrode may be decreased, so that the doped pattern and the electrode may be uniformly formed and a power efficiency of the solar cell may be improved. | 01-19-2012 |
20120024164 | COOKING APPLIANCE - Provided is a cooking appliance. Steam generated in a steam generation part is selectively supplied into a cooktop part or a steam cooking part. The steam supplied into the cooktop part is used for cleaning a top plate. Also, the steam supplied into the steam cooking part is used for cooking a food. Thus, the steam may be used in a lot of uses, e.g., for cooking the food and cleaning the top plate. | 02-02-2012 |
20120045005 | COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR MULTI-USER TRANSMISSION OPPORTUNITY (TXOP) POWER SAVING - Provided is a terminal and an access point in an active mode for multi-user transmission opportunity (TXOP) power saving that may decrease power consumption by changing an operation state of the terminal from an awake state to a sleep state if there is no stream of data to be transmitted during a TXOP duration. | 02-23-2012 |
20120109969 | METHOD FOR DATA ANALYSIS AND DIGITAL FORENSICS AND SYSTEM USING THE SAME - A system and method for data analysis and digital forensics is provided. The system for data analysis and digital forensics may include: an online data forensic server for collecting and analyzing usage history information from an object device, which is subject to data collection, downloading and collecting data on the Internet based on the usage history information, requesting issuance of a timestamp token for the collected data, and receiving the issued timestamp token; a timestamp token issuing server for issuing the timestamp token for the collected data in response to the request for issuance of the timestamp token and proving the issued timestamp token to the online data forensic server; and a storage device for storing the collected data. | 05-03-2012 |
20120141985 | REAL-TIME MONITORING OF DEPLETION OF HIGH-ABUNDANCE BLOOD PROTEINS OR RECOVERY OF LOW-ABUNDANCE BLOOD PROTEINS BY UV SPECTROMETRY - Disclosed is a method for monitoring depletion of high-abundance and/or recovery of low-abundance proteins from blood in real time, comprising: (a) labeling high-abundance and/or low-abundance proteins of a blood specimen with a fluorescent or UV marker; and (b) passing blood samples containing the fluorescent or UV marker-labeled high-abundance and/or low-abundance proteins through a removal column. | 06-07-2012 |
20120142391 | ACCESS POINT FOR ASSIGNING GROUP ID AND METHOD OF ASSIGNING GROUP ID - Provided is an access point that may transmit information about a data receiving terminal that receives data from the access point, to a terminal, using a limited number of bits. Using an overloading scheme, information about multiple terminals may be expressed based on a limited number of bits. | 06-07-2012 |
20120164821 | METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE - A method of fabricating a semiconductor device may include: alternatively stacking dielectric layers and conductive layers on a substrate to form a stack structure, forming a first photoresist pattern on the stack structure, forming a second photoresist pattern whose thickness is reduced as the second photoresist pattern extends from the center of the stack structure towards a periphery of the stacked structure by performing a heat treatment on the first photoresist pattern, etching the stack structure through the second photoresist pattern to form a slope profile on the stack structure whose thickness is reduced as the slope profile extends from the center of the stack structure towards a periphery of the stacked structure, and forming a step-type profile on the end part of the stack structure by selectively etching the dielectric layer. | 06-28-2012 |
20120183973 | BIOMARKER COMPOSITION FOR DETECTING DIABETIC RETINOPATHY AND DIAGNOSTIC KIT THEREFOR - Provided is a biomarker composition for detecting diabetic retinopathy, comprising at least one protein selected from the group consisting of proteins as set forth in SEQ ID NOS: 1 to 169, a method and a kit for diagnosing diabetic retinopathy using the same. The biomarker can provide fundamental information in researching vitreoretinal disorders, such as, diabetic retinopathy and the protein may be used in a method and a kit for diagnosing diabetic retinopathy with a molecule specifically binding thereto. | 07-19-2012 |
20120188923 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, AND COMMUNICATION METHOD - Provided are a transmission apparatus, a reception apparatus, and a communication method thereof that may decrease power consumption of a terminal by reducing an amount of time used by the terminal to overhear a frame or a packet to be transmitted to another terminal, or an amount of time used to receive a frame or a packet to be transmitted to the terminal. | 07-26-2012 |
20120224519 | COMMUNICATION METHOD OF A TARGET TERMINAL AND AN ACCESS POINT FOR GROUP ID MANAGEMENT IN MU-MIMO TRANSMISSION - Provided is a communication method of a target terminal and an access point (AP) for a group identification (ID) management in a multi-user multiple-input multiple-output (MU-MIMO) transmission capable of managing a group ID of members of a group without influencing other terminals in the group by transmitting membership information and position information to each of a plurality of terminals. | 09-06-2012 |
20120224540 | COMMUNICATION METHOD OF TERMINALS AND ACCESS POINT FOR UPLINK MU-MIMO CHANNEL ACCESS - Provided is a communication method of an access point and a plurality of terminals that are capable of enhancing a throughput of an overall network in a random access environment by enabling the access point to wait for additional terminals to transmit data through uplink communication during a predetermined waiting window. | 09-06-2012 |
20130155927 | LOW POWER WIRELESS COMMUNICATION APPARATUSES AND METHOD THEREOF - Provided are low-power wireless communication apparatuses and a method thereof. A hub may receive a beacon signal from a neighboring hub that is within a predetermined area from the hub, and control an operation of a node served by the hub based on information received from the neighboring hub. | 06-20-2013 |
20130172042 | FIRST HUB AND SECOND HUB COMMUNICATING BY TEMPORAL CONNECTION BETWEEN DIFFERENT WIRELESS BODY AREA NETWORKS (WBANs) AND COMMUNICATION METHOD THEREOF - Provided are a first hub corresponding to a first WBAN and a second hub corresponding to a second WBAN which may communicate with each other through a temporal connection. The temporal connection may decrease the usage of additional data, complexity, and power consumption that typically occurs due to mutual communication between different WBANs. | 07-04-2013 |
20130173999 | HIERARCHICAL MODULATION AND DEMODULATION APPARATUS AND METHOD - An apparatus and method for hierarchical modulation and demodulation in a wireless communication network are provided. A hierarchical modulation apparatus may map information bits to a plurality of levels based on a predetermined level map, may generate an error verification code for each of the levels based on the information bits mapped to the levels, may generate coded information bits for each of the levels, and may map bits in a predetermined position among the coded information bits, to Pulse-Position Modulation (PPM) symbols in a sequence of the levels. | 07-04-2013 |
20130178150 | HUB, RELAY NODE, AND NODE FOR RECONFIGURING ACTIVE STATE POSITION IN WIRELESS BODY AREA NETWORK (WBAN), AND COMMUNICATION METHOD THEREOF - Provided are a hub, a relay node, and a node for reconfiguring an active time position of a node in a WBAN. An active time position of the node may be reconfigured based on information associated with an active time position of a candidate relay node that the node desires to use as a relay node. | 07-11-2013 |
20130188653 | METHOD AND NODE FOR PREVENTING COLLISION BETWEEN NETWORKS COMMUNICATING BASED ON CSMA/CA - A method and a target node for preventing collisions between networks communicating based on a carrier sense multiple access/collision avoidance (CSMA/CA) scheme, are provided. The method includes synchronizing an object network with a neighboring network. The method further includes allocating, to the object network, a slot index based on a number of the networks, and a contention window (CW) size. The method further includes setting, for the object network, a back-off counter value based on the CW size. The method further includes reducing the back-off counter value based on a channel state of the object network, and the slot index. The method further includes transmitting data related to the neighboring network based on the back-off counter value. | 07-25-2013 |
20130195083 | MAIN HUB, SUB HUB, AND SENSOR NODE COMMUNICATING IN WIRELESS BODY AREA NETWORK (WBAN) INCLUDING AT LEAST ONE SUB HUB, AND COMMUNICATION METHOD THEREOF - A main hub, a sub hub, and a sensor node communicating in a wireless body area network (WBAN) including at least one sub hub, and a communication method thereof, are provided. A communication method of the main hub, includes assigning a beacon slot to the sub hub. The method further includes receiving, from the sub hub, a beacon signal based on the beacon slot. The method further includes verifying whether the sub hub includes data to be transmitted to the main hub based on the beacon signal. The method further includes receiving, from the sub hub, the data based on a result of the verification. | 08-01-2013 |
20130287162 | INTEGRATED PROCESS FOR WATER-HYDROGEN-ELECTRICITY NUCLEAR GAS-COOLED REACTOR - Disclosed herein is an integrated process for production of electricity, hydrogen, and water using a high-temperature gas-cooled reactor as a single source, comprising: the high-temperature gas-cooled reactor, a power conversion unit connected directly or indirectly with the high-temperature gas-cooled reactor to receive heat produced by a reactor core of the high-temperature gas-cooled reactor and drive a gas turbine by the heat, thereby producing electricity through an electric generator, a hydrogen production unit that produces hydrogen by receiving the heat produced by the high-temperature gas-cooled reactor and/or the electricity produced by the electric generator, an electrical desalination unit that produces water by using the electricity produced by the electric generator, and a thermal desalination unit that produces water by distilling fresh water from salt water with waste heat recovered from a precooler and an intercooler of the power conversion unit. | 10-31-2013 |
20140185507 | COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR MULTI-USER TRANSMISSION OPPORTUNITY (TXOP) POWER SAVING - Provided is a terminal and an access point in an active mode for multi-user transmission opportunity (TXOP) power saving that may decrease power consumption by changing an operation state of the terminal from an awake state to a sleep state if there is no stream of data to be transmitted during a TXOP duration. | 07-03-2014 |
20140254713 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 09-11-2014 |
20140269569 | APPARATUSES AND METHODS FOR DATA TRANSMISSION AND RECEPTION - Provided is a data transmission system of providing preambles of different classes according to a characteristic of a terminal. A terminal having constraints on using a power with respect to a data reception may receive only a preamble of a particular class and thus decrease a power consumption. A general terminal may receive preambles of plural classes and quickly receive data. | 09-18-2014 |
20140273813 | HUB, RELAY NODE, AND NODE FOR RECONFIGURING ACTIVE STATE POSITION IN WIRELESS BODY AREA NETWORK (WBAN), AND COMMUNICATION METHOD THEREOF - Provided are a hub, a relay node, and a node for reconfiguring an active time position of a node in a WBAN. An active time position of the node may be reconfigured based on information associated with an active time position of a candidate relay node that the node desires to use as a relay node. | 09-18-2014 |
20150043402 | RECEPTION NODE AND TRANSMISSION NODE FOR SAVING ENERGY OF RECEPTION NODE, AND COMMUNICATION METHOD THEREOF - A communication method of a transmission node includes generating information of a transmission unavailable time period of the transmission node in a reception available time period of a reception node, and transmitting, to the reception node, the information of the transmission unavailable time period. The reception node operates in a sleep state based on the information of the transmission unavailable time period. | 02-12-2015 |
20150049660 | COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR POWER SAVING - Provided is a communication technology of an access point and a terminal that may decrease power consumption by changing an operation state of the terminal from an awake state to a sleep state when a data stream to be transmitted to the terminal is absent or has completed in a transmission opportunity (TXOP) duration. | 02-19-2015 |
20150085947 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 03-26-2015 |