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 |
20090111385 | APPARATUS FOR DETERMINING INTERFERENCE USING CYCLIC PREFIX AND METHOD THEREOF - An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix. | 04-30-2009 |
20090111525 | MINI BASE STATION CONNECTABLE WITH INTERNET AND TERMINAL - A mini base station connectable with the Internet including a frequency recognition unit to recognize a frequency band of an external signal transmitted from a cellular base station; and an operation frequency determination unit to determine an operation frequency band according to interference generated with the cellular base station based on the recognized frequency band of the external signal. | 04-30-2009 |
20090117914 | FREQUENCY SPECTRUM SENSING METHOD USING PILOT SIGNAL AND COGNITIVE RADIO SYSTEM USING THE SAME - An operation method of a radio communication station is provided. The operation method of a radio communication station, the operation method including: transmitting a basic pilot signal to at least one terminal located in a coverage of a preoccupied system; and transmitting a cognitive radio (CR) pilot signal. | 05-07-2009 |
20090124206 | PILOT SIGNAL POWER CONTROL APPARATUS AND OPERATION METHOD OF PILOT SIGNAL POWER CONTROL APPARATUS - A pilot signal power control apparatus to determine a power level of a pilot signal of a primary network to indicate an availability of a wireless resource of thereof to a secondary user of a secondary network according to a cognitive radio technology, the pilot signal power control apparatus and an operation method thereof, the pilot signal power control apparatus including: a prediction unit to predict a noise increase and/or a sensing probability, the noise increase occurring in a primary user of the primary network due to a channel estimation error, and the sensing probability being a probability that a secondary user senses the pilot signal of; a channel capacity calculation unit to calculate a channel capacity of the primary user based on the predicted noise increase and/or sensing probability; and a power level determination unit to determine the power level of the pilot signal using the calculated channel capacity. | 05-14-2009 |
20090186646 | COGNITIVE RADIO COMMUNICATION METHOD FOR CONTROLLING SENSING OPERATION AND COGNITIVE RADIO COMMUNICATION APPARATUS ENABLING THE METHOD - A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system. | 07-23-2009 |
20090190566 | METHOD AND APPARATUS OF CONTROLLING ACCESS MODE FOR COMMUNICATION SYSTEM USING SHARED OR UNLICENSED BAND - A technology that can adaptively control an access mode according to a shared band or an unlicensed band used by an adjacent communication system. An access mode controlling apparatus includes a band recognition unit to recognize a usage rate of an unlicensed band or a shared band that is used by an adjacent communication system of a target communication system; a mode determination unit to determine, as an access mode, any one of a contention access mode and a contention-free access mode, based on the usage rate of the unlicensed band or the shared band; and an information transmitter to transmit mode information associated with the determined access mode to member nodes or a base station of the target communication system. | 07-30-2009 |
20090191877 | METHOD AND DEVICE FOR ADAPTABLY CONTROLLING BANDWIDTH OF CHANNEL - Disclosed are a base station and mobile station to adaptively control a bandwidth of a channel. The base station includes a state information recognition unit to recognize neighboring-state information related with a traffic load of at least one neighboring network adjacent to a target network, a control state information transmitting unit to transmit control state information related with the controlled bandwidth of the target channel to mobile stations of the target network, and a bandwidth control unit to control a bandwidth of a target channel used in the target network according to a bandwidth of a channel used in the neighboring network based on the neighboring-state information. | 07-30-2009 |
20090209265 | MOBILE SYSTEM AND BASE STATION SYSTEM FOR EFFECTIVELY USING LICENSED SPECTRUM AND SHARED SPECTRUM - A mobile system and a base station system for effectively using a licensed spectrum and a shared spectrum are provided. The mobile system includes: an initialization unit to initialize transmitting and receiving of data using at least one of the licensed spectrum and the shared spectrum; a sensing unit to sense a spectrum for transmitting and receiving of the data via the at least one spectrum; and a transceiver to transmit and receive the data via the sensed spectrum. | 08-20-2009 |
20090274081 | DEVICE TO SENSE FREQUENCY BAND TO SHARE OPERATING FREQUENCY BANDS IN HETEROGENEOUS COMMUNICATION SYSTEMS AND METHOD THEREOF - A cognitive radio communication device and method are provided. The cognitive radio communication device includes a reception unit to receive reference signals from a first communication device, a frequency division unit to divide operating frequency bands of the first communication device into a plurality of sub frequency bands, a first sensing unit to sense each of the plurality of sub frequency bands using the reference signals to estimate whether the first communication device uses each of the plurality of sub frequency bands, and to determine an unused frequency band group including at least one sub frequency band not used by the first communication device based on the estimated result, and a transmission unit to transmit data to a second communication device using the sub frequency band included in the unused frequency band group. | 11-05-2009 |
20090310548 | APPARATUS AND METHOD FOR RADIO COMMUNICATION - An apparatus and a method of performing radio communication are provided. The radio communication apparatus may determine a channel capacity of a radio channel based on a sensing duration to sense the radio channel and a false alarm probability, determine a sensing duration value and a false alarm probability value that maximize the channel capacity, and sense the radio channel based on the determined sensing duration value and the false alarm probability value. | 12-17-2009 |
20100009695 | COMMUNICATION SYSTEM TO PERFORM LENDING AND/OR BORROWING OF A RADIO RESOURCE - A wireless communication system, and more particularly, a base station apparatus to lend an idle resource to another base station or to borrow an idle resource from another base station is provided. A borrowing base station apparatus includes a transmitter to transmit an idle resource borrowing message to a lending base station, and a receiver to receive, from the lending base station in response to the idle resource borrowing message, an idle resource lending message including information regarding whether to lend an idle resource of the lending base station, such that the transmitter transmits data to a terminal using the idle resource. The borrowing base station may borrow an idle resource from the lending base station to use the borrowed idle resource to perform data transmission. | 01-14-2010 |
20100086010 | COGNITIVE RADIO COMMUNICATION DEVICE FOR PERFORMING SPECTRUM SENSING AND DATA COMMUNICATION - A cognitive radio communication device including at least two radio frequency chains is provided. In order to perform a feature detection, the cognitive radio frequency device may reduce or eliminate a quiet time where a data communication is suspended using the at least two RF chains. While one RF chain performs the feature detection, another RF chain may perform the data communication. | 04-08-2010 |
20100091789 | COGNITIVE RADIO COMMUNICATION TERMINAL AND METHOD FOR DETECTING COLLISION USING FEATURE DETECTION - A cognitive radio communication terminal including a transmission processing unit to divide data by a quiet time slot that is allocated at a first point in time of a collision detection period, to transmit at least one portion of the divided data to a reception side, and a sensing unit to determine whether at least one of a feature information and an energy of another terminal is detected in a channel with the reception side during the quiet time slot of the first point in time. Where neither the feature information nor the energy of the other terminal is detected based on a determination of the sensing unit, the transmission processing unit transmits the remaining divided data. | 04-15-2010 |
20100150113 | COMMUNICATION SYSTEM USING MULTI-BAND SCHEDULING - A multi-band scheduling method determines frequency bands for each of a plurality of frames existing in a single session queue from among a plurality of frequency bands based on data characteristics of each of the plurality of frames. In particular, the multi-band scheduling method may assign a frame with a high significance to a frequency band having a superior channel state, thereby increasing communication reliability. Also, a broadcasting service system may use the multi-band scheduling method to effectively provide the broadcasting services. | 06-17-2010 |
20100208618 | METHOD FOR DETECTING HIDDEN STATION IN A WIRELESS COMMUNICATION NETWORK AND SYSTEM THEREFOR - Disclosed is a method for detecting a hidden station in a specific station constituting a wireless communication network that includes receiving a frame after a lapse of an idle state interval longer than a predetermined waiting time; determining that there is a hidden station, if a size of the received frame is equal to a size of an Acknowledge (ACK) frame; and determining that there is no hidden station, if the size of the received frame is not equal to the size of the ACK frame. | 08-19-2010 |
20100304682 | CLUSTERING METHOD AND COMMUNICATION DEVICE FOR COORDINATED MULTIPOINT TRANSMISSION - A communication system performing a coordinated multipoint transmission is provided. A mobile station may measure expected channel quality information when an interference of a serving base station does not exist. The serving base station may determine whether a neighbor base station and the serving base station are eligible to perform the coordinated multipoint transmission. The serving base station may determine whether the neighbor base station and the serving base station are eligible to perform the coordinated multipoint transmission using a criterion associated with an evaluation of an increase in a transmission rate of the mobile station. | 12-02-2010 |
20100330917 | COMMUNICATION SYSTEM FOR DISTRIBUTEDLY MANAGING INTERFERENCE USING FEEDBACK MESSAGE - A method of operating a target terminal being serviced by a serving base station is provided. In a downlink case, the target terminal being served by the serving base station may provide a feedback message to a neighboring base station. The feedback message may be used by the neighboring base station to verify channel information between the serving base station and the target terminal, and channel information between the neighboring base station and the target terminal. In an uplink case, the neighboring base station may provide the feedback message to the target terminal. The target terminal may transfer, to the serving base station, channel information between the neighboring base station and a particular terminal, and channel information between the neighboring base station and the target terminal that are verified based on the feedback message. The feedback message may be transferred using a common shared channel or a random access channel. | 12-30-2010 |
20110009140 | PRECODING METHOD FOR FEMTOCELL OR PICOCELL AND COMMUNICATION SYSTEM OF USING THE METHOD - A precoding method for a femtocell or a picocell and a communication system using the same is provided. The communication system may include a small base station that is able to implement a protection mode to protect a neighbor terminal from an interference regardless of whether a neighbor base station is performing a process to protect the neighbor terminal from the interference. Also, the small base station may use at least one process scheme appropriate for a current environment among various process schemes, thereby effectively protecting the neighbor terminal from the interference. | 01-13-2011 |
20110014924 | SYSTEM AND METHOD FOR COOPERATIVE INTER-CELL INTERFERENCE CONTROL - A system to cooperatively control inter-cell interference is provided. A first frequency allocated to a central area of a serving cell associated with a serving base station may be allocated to a central area of a neighboring cell associated with a neighboring base station. A second frequency allocated to an edge area of the serving cell may be allocated to an edge area of the neighboring cell. Where a terminal is located in the edge of the neighboring cell, scheduling information, channel information, and data may be exchanged between the terminal and the serving base station. | 01-20-2011 |
20110086655 | TUNNELING CONTROL METHOD AND APPARATUS FOR COORDINATED MULTI-POINT TRANSMISSION, AND METHOD FOR TRANSMITTING DATA - A tunneling control method and apparatus for a coordinated multi-point transmission, and a method of transmitting data, are provided. The tunneling control method and the data transmission method may minimize a time delay that occurs because of the coordinated multi-point transmission between base stations. | 04-14-2011 |
20110110285 | SYSTEM AND METHOD FOR TRANSMITTING DATA IN A MULTI-CELL NETWORK - A communication system and method that receives data from a terminal using a cooperative reception scheme, is provided. Each terminal may generate multi-cell transmission data used for overcoming transmission delay and transmit, to each base station, a data frame including the multi-cell transmission data. | 05-12-2011 |
20110128939 | HIERARCHICAL-CELL COMMUNICATION SYSTEM USING ASYMMETRIC FEEDBACK SCHEME BASED ON CLASS OF ACCESS NETWORK - A small cell communication system may reduce interference occurring in a macro terminal through beamforming, even when using the same frequency resources as used by a macro communication system. For example, the small cell communication system may use a larger amount of radio resources than the macro communication system for transmission of feedback information in an uplink. For example, the small cell communication system may use a codebook having a larger size than a size of a codebook used by the macro communication system. | 06-02-2011 |
20120114061 | COMMUNICATION SYSTEM FOR RECOGNIZING TYPE OF NOISE SOURCE - Provided is a communication system that includes setting a detection threshold according to a distribution of at least one logic value of a transmission signal corresponding to an on-off keying (OOK) scheme or a frequency shift keying (FSK) scheme, and determining a type of noise source influencing a reception signal using the detection threshold and the distribution of at least one logic value. | 05-10-2012 |
20120178496 | APPARATUS AND METHOD FOR ADAPTIVELY OPERATING AN APPLICATION PROGRAM - Provided is an apparatus for adaptively operating an application program that may control whether to activate the application program based on whether a status of at least one of a wireless channel and a battery satisfy requirements of the application program. | 07-12-2012 |
20120243454 | METHOD AND APPARATUS OF SENSOR NETWORK SUPPORTING BIDIRECTIONAL EVENT DETECTION - A communication method of a coordinator in a bidirectional event transmission sensor network comprising a sensor node and the coordinator is provided. The method includes sensing, in an uplink section, whether a signal having energy greater than or equal to a predetermined magnitude is received, the signal indicating occurrence of an uplink event detected by the sensor node, and transmitting, to the sensor node in a downlink section, a synchronization packet that is used for receiving the uplink event or for transmitting a downlink event in response to the coordinator detecting the downlink event or sensing the signal having energy greater than or equal to the predetermined magnitude in the uplink section. The bidirectional event transmission sensor network has a structure of a super frame that includes at least one standby slot (SS) including the uplink section and the | 09-27-2012 |
20130021967 | LOW POWER RADIO DEVICE AND RADIO RESOURCE SHARING METHOD FOR LOW POWER RADIO DEVICE - A low power radio device and a radio resource sharing method for the low power radio device are provided. In the low power radio device, a channel state (CS) is detected by carrier sensing before transmission of each frame to reduce interference and a need of retransmission of each frame, accordingly, reducing energy consumption. | 01-24-2013 |
20130077497 | COMMUNICATION DEVICE FOR DETECTING COLLISION IN OPERATING FREQUENCY BAND AND ANOTHER FREQUENCY BAND, AND COMMUNICATION METHOD THEREOF - A communication device for detecting a collision in an operating frequency band and another frequency band, and a communication method thereof. The communication method includes transmitting or receiving a packet using an operating frequency band. The communication method further includes detecting whether another communication device transmits another packet using another frequency band different from the operating frequency band while the transmitting or the receiving of the packet using the operating frequency band. The communication method further includes ceasing the transmitting or the receiving of the packet using the operating frequency band based on a result of the detection. | 03-28-2013 |
20130128934 | RECEIVER AND TRANSMITTER OF COPING WITH INTERFERENCE IN SUPER-REGENERATIVE COMMUNICATION SYSTEM, AND METHOD OF USING THE RECEIVER AND THE TRANSMITTER - A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency. | 05-23-2013 |
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 |
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 |
20140029652 | LOW POWER COMMUNICATION DEVICE FOR SCHEDULING DATA SEGMENTS USING HOLD TIME OR LOCK TIME OF PHASE LOCKED LOOP - A device communicating with a node, includes a communication unit configured to transmit a transmitting data segment to the node, and receive a receiving data segment from the node. The device further includes a phase locked loop (PLL) configured to generate an operating frequency for the communication unit. The device further includes a PLL controller configured to control a hold time and a lock time, of the PLL, that are shared between the node and the device. The device further includes a scheduler configured to schedule the transmitting data segment and the receiving data segment based on the controlled hold time and lock time. | 01-30-2014 |
20140077976 | MINIMUM ENERGY CODING METHOD AND APPARATUS FOR PERFORMING DIRECT CURRENT (DC) BALANCING IN BODY AREA NETWORK OR LOW POWER NETWORK - A minimum energy coding method and apparatus that includes obtaining groups of bits from a bitstream and finding a mapping rule between the groups of bits and codewords that is chosen to maintain a DC balance. For example, the bitstream may be a bitstream corresponding to a biosignal. | 03-20-2014 |
20140237495 | METHOD OF PROVIDING USER SPECIFIC INTERACTION USING DEVICE AND DIGITAL TELEVISION(DTV), THE DTV, AND THE USER DEVICE - An interactive method includes displaying image content received through a television (TV) network, identifying an object of interest of a user among a plurality of regions or a plurality of objects included in the image content, and providing additional information corresponding to the object of interest. | 08-21-2014 |
20140240277 | THREE-DIMENSIONAL (3D) DISPLAY DEVICE FOR PROVIDING INPUT-OUTPUT INTERFACE USING DYNAMIC MAGNETIC FIELD CONTROL AND METHOD THEREOF - A three-dimensional (3D) display device for providing an input-output interface using a dynamic magnetic field control is disclosed, the device including a display unit to display a 3D image, a magnetic field generation unit to generate a magnetic field, and a control unit to dynamically control the magnetic field generation unit to generate a 3D magnetic field associated with the 3D image. | 08-28-2014 |
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 |