Patent application number | Description | Published |
20090092182 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SPACE BLOCK CODING SIGNAL THROUGH ITERATIVE MULTI-USER DETECTION - A method and apparatus for transmitting and receiving a space block coding signal through Iterative Multi-user Detection is provided. The apparatus includes a multi-user interference cancellation unit which cancels multi-user interference in a received signal and outputs a first signal and a second signal that are sequentially transmitted from two transmitting antennas, a linear combiner which performs linear combination for the first signal and the second signal, and an equalizer which applies different equalization coefficients to the combined first signal and the second signal, respectively, to perform frequency-domain equalization. | 04-09-2009 |
20090103428 | SYSTEM FOR GENERATING SPACE FREQUENCY BLOCK CODE RELAY SIGNAL AND METHOD THEREOF - A method and system for generating a space frequency block code relay signal includes a signal detection unit which detects a received signal by receiving a first and second source signals transmitted from a first and second source nodes, a relay signal generation unit which generates a relay signal cooperating with the first and second source signals using a space frequency block code (SFBC) scheme based on the received signal, and a signal transmitter which transmits the relay signal to a destination node. | 04-23-2009 |
20090176492 | COMMUNICATION SYSTEM FOR TRANSMITTING DATA USING COOPERATIVE COMMUNICATION RELAY - A mobile station which connects to a base station having a plurality of relays belonging thereto is provided. The mobile station includes a receiving unit which receives a first preamble signal from a first relay and receives a second preamble signal from a second relay, the first relay belonging to a first cluster including an N1 number of relays and the second relay belonging to a second cluster including an N2 number of relays, a control unit which selects the first cluster as an access cluster to connect to the base station, based on the first preamble signal and the second preamble signal, and a transmission unit which transmits an access request message to the first relay, wherein the access request message is transmitted to the base station via the first relay. | 07-09-2009 |
20090252254 | TRANSMITTER AND RECEIVER FOR FREQUENCY DOMAIN EQUALIZATION - A transmitter and/or receiver for performing frequency domain equalization is provided. A transmitter includes a pilot position determination unit for determining positions for inserting pilots in a frequency domain based on frequency spectrums of data, and a pilot insertion unit for inserting the pilots between the frequency spectrums of the data according to the determined positions for inserting the pilots. | 10-08-2009 |
20100240725 | NOVEL 1,3-DIHYDRO-5-ISOBENZOFURANCARBONITRILE DERIVATIVES AND PHARMACEUTICAL COMPOSITION THEREOF FOR THE TREATMENT OF PREMATURE EJACULATION - Disclosed herein are novel 1,3-dihydro-5-isobenzofurancarbonitrile derivatives represented by Formula 1, or pharmaceutically acceptable salts thereof. Also disclosed is a pharmaceutical composition for treating or preventing premature ejaculation including the compound. The 1,3-dihydro-5-isobenzofurancarbonitrile derivatives have a short half-life and inhibit the ejaculation process by selectively inhibiting serotonin reuptake via a serotonin reuptake transporter present in a presynaptic neuron. Thus, the compounds are useful in the treatment and prevention of premature ejaculation. | 09-23-2010 |
20100261426 | COMMUNICATION DEVICE AND RELAY DEVICE - A communication device that may select a relay node from a plurality of relay nodes, and be used as a signal receiving node through the selected relay node is provided. Additionally, a relay device that may be used as a relay node to receive and broadcast signals is provided. | 10-14-2010 |
20110009125 | MOBILE STATION, BASE STATION, AND OPERATION METHOD OF MOBILE STATION - Provided are a mobile station that may determine a Precoding Matrix Index (PMI) of a serving channel, generate Channel State Information (CSI) based on only interference channels, and feed back the PMI and the CSI to a serving base station, a base station that may design a precoding vector based on the PMI and the CSI, and an operation of the mobile station. Also, provided are a mobile station that may determine a PMI based on only interference channels, generate CSI of a serving channel, and feed back the PMI and the CSI to a serving base station, a base station that may design a precoding vector based on the PMI and the CSI, and an operation method of the mobile station. | 01-13-2011 |
20110075580 | SYSTEM AND METHOD FOR DISTRIBUTED CONTROL OF SPECTRUM POWER IN A MULTI-CELL COMMUNICATION SYSTEM - A system and method for distributed control of spectrum power in a multi-cell communication system are provided. A plurality of cells included in a multi-cell communication system may be grouped into a plurality of groups. Cells included in a first group may iteratively calculate spectrum powers to perform dynamic spectrum management (DSM) scheme in calculation sub-frames. The cells included in the first group may also perform a user scheduling. Spectrum powers determined by cells included in a second group and user scheduling results of the cells in the second group may be held static. | 03-31-2011 |
20110077041 | METHOD AND DEVICE FOR USER SCHEDULING AND MANAGING TRANSMIT POWER IN A COMMUNICATION SYSTEM - A user scheduling and transmission power controlling method in a hierarchical-cell communication system or a multi-cell communication system, and a device to perform the methods, are provided. Interference may occur between various cells in the hierarchical-cell communication system or the multi-cell communication system, and the interference may be controlled by adjusting transmission power of various cells. The various cells may determine an optimal transmission power based on a cost of a corresponding transmission power. Also, the various cells may serve various users and may propose an optimal user scheduling method. | 03-31-2011 |
20110096736 | COMMUNICATION SYSTEM HAVING NETWORK ACCESS STRUCTURE - A communication system with an improved network access structure for inter-cell cooperation is provided. The communication system includes a central unit and at least one radio access unit. The at least one radio access unit may form at least one virtual cell by merging or separating cells of radio access units according to a distribution of terminals, statuses of channels, an amount of traffic, and the like. | 04-28-2011 |
20110098055 | COMMUNICATION SYSTEM FOR INTER-CELL COORDINATION - System and methods for intercell coordination are provided. The system includes a macro terminal and a macro base station that allocate a radio resource for a sounding signal and determine a pattern of a sounding signal, in advance. The macro base station provides a femto base station included in the system with information about the pattern of the sounding signal, and the information about the radio resource of the sounding signal. The femto base station may receive the sounding signal from the macro terminal based on the information, and thus, the femto base station may determine whether the macro terminal exists and may determine a channel between the macro terminal and the femto base station. | 04-28-2011 |
20110103503 | METHOD AND APPARATUS FOR CONTROLLING DYNAMIC CHANNEL FEEDBACK IN A MIMO NETWORK - A communication method and apparatus for coordinated multi-point (CoMP) transmission, is provided. Sizes of codebooks for a plurality of base stations may be adjusted based on a status of channels between a target terminal and a plurality of base stations. The terminal feeds back, to at least one of the plurality of base stations, channel direction information (CDI) including a number of bits of feedback. | 05-05-2011 |
20110124343 | COMMUNICATION SYSTEM OF DETECTING VICTIM TERMINAL AND PERFORMING INTERFERENCE COORDINATION IN MULTI-CELL ENVIRONMENTS - Provided is a method, and an apparatus and communication system to perform the method, of detecting a victim terminal and performing an interference coordination in a multi-cell environment. The multi-cell environment may include a heterogeneous cell environment including a small cell and a macro cell. The method includes determining whether a macro terminal is located within a cell coverage of a small base station, and adjusting the cell coverage according to the determination. | 05-26-2011 |
20110149921 | METHOD FOR ASSIGNING AND MANAGING REFERENCE SIGNALS IN A MULTI-CELL ENVIRONMENT, AND NETWORK DEVICE AND TERMINAL FOR APPLYING THE METHOD - A method of assigning and managing reference signals in a multi-cell environment, and a network device and a terminal for applying the method, are provided. Reference signal patterns may be assigned to multiple femtocells through a long term coordination of a central control unit that is used to control multiple cells. | 06-23-2011 |
20110159881 | Communication System Using Joint Leakage Suppression Scheme with Low Complexity - A communication method for at least one mobile station that includes a target mobile station that performs a Cooperative Multi-Point (CoMP) communication with at least two base stations, is provided. The communication method includes determining a beamforming vector used by the at least two base stations based on channel vectors and at least one channel matrix such that a signal-to-leakage-plus-noise-ratio (SLNR) for a target antenna from among antennas of a target mobile station is maximized. A Cholesky factorization may be used to determine an optimal beamforming vector with a low complexity. | 06-30-2011 |
20110159897 | SYSTEM AND METHOD USING RATE SPLIT SCHEME BASED ON COOPERATION BETWEEN RECEIVERS - Each of a first transmitter and a second transmitter uses a rate split scheme. Each of the first transmitter and the second transmitter may transmit at least four sub-messages, and different transmission powers may be allocated to the at least four sub-messages. Also, each of receivers may cooperate with each other, may share sub-messages that act as interferences, and may extract desired messages using the shared sub-messages. | 06-30-2011 |
20110177834 | COMMUNICATION APPARATUS AND PRECODING METHOD BASED ON MULTIPLE CELLS AND MULTIPLE USERS - Provided are a communication apparatus that may generate a precoding matrix including precoding vectors to cancel or align interference existing in a plurality of terminal devices based on location of the terminal devices, and a terminal device that may estimate a channel formed between the terminal device and the communication apparatus to cancel or align interference signals. | 07-21-2011 |
20110194594 | APPARATUS AND METHOD FOR DETERMINING MIMO/DSM OPERATING MODE - Provided is a data transmission system that may determine a multiple input multiple output dynamic spectrum management (MIMO-DSM) operation mode of a base station based on information associated with a data transmission route and a computational capability of each base station. A terminal may generate feedback information based on a cooperation level between base stations and may transmit the generated feedback information to a serving base station. The serving base station may select terminals that may receive data from among a plurality of terminals through a MIMO-DSM algorithm and a user scheduling based on the feedback information. | 08-11-2011 |
20110195704 | COMMUNICATION SYSTEM OF PERFORMING UPLINK COMMUNICATION AND DOWNLINK COMMUNICATION USING OVERLAPPING RADIO RESOURCE - A communication system performs an uplink communication and a downlink communication using respective radio resources that at least partially overlap each other in both time and frequency, which may cause interference to occur in at least one downlink terminal due to at least one uplink terminal. The at least one uplink terminal and the at least one downlink terminal may process the interference according to a rate split scheme, an interference control scheme, and the like. Interference occurring between at least one transmit antenna and at least one receive antenna of a base station may be processed according to an echo cancellation scheme and the like. | 08-11-2011 |
20110218000 | MULTI-CELL COMMUNICATION APPARATUS AND METHOD USING RATE-SPLITTING SCHEME AND TRANSMISSION FRAME - Provided is a multi-cell communication system using a rate-splitting scheme and a transmission frame for the multi-cell communication system. The multi-cell communication system may determine whether to perform a rate-splitting based on channel information of a macro base station and a femto base station in a multi-cell environment. The multi-cell communication system may allocate a power or a bandwidth to a message to be transmitted based on the channel information. In the multi-cell environment, a terminal may receive MAP information from a base station and may decode the received MAP information, determining a base station that performs the rate-splitting. | 09-08-2011 |
20110235750 | BEAMFORMING METHOD AND APPARATUS USING A RATE SPLITTING SCHEME IN A MULTI-CELL MULTI-ANTENNA INTERFERENCE CHANNEL - A beamforming method and apparatus for using a rate splitting scheme in a multi-cell multi-antenna system, are provided. The multi-cell multi-antenna system determines transmission and reception beamforming vectors, thereby being divided into a plurality of pairs of single input and single output (SISO) interference channels. A rate splitting scheme may be applied to each of the plurality of pairs. | 09-29-2011 |
20110244900 | DATA TRANSMISSION SYSTEM FOR DETERMINING DATA TRANSMISSION POWER USING A VIRTUAL CELL - A data transmission system that determines data transmission power using a virtual cell is provided. A base station may receive transmission data from a plurality of cooperative base stations positioned around the base station, and model terminals receiving an interference signal from the base station and the plurality of cooperative base stations into a virtual cell. The base station may calculate the influence of the interference signal transmitted to the terminal, using the virtual cell, and determine a transmission power for a plurality of frequency bands based on the interference signal. | 10-06-2011 |
20110275378 | MULTI-CELL COMMUNICATION METHOD AND SYSTEM OF A MOBILE TERMINAL, A MICRO BASE STATION, AND A MACRO BASE STATION - Communication methods of a macro base station which collects position information about a mobile micro base station and that is served by the macro base station, predicts a channel between the macro base station and the micro base station, and performs a handover between the macro base station and the micro base station based on a state of the predicted channel is provided. | 11-10-2011 |
20110305293 | COGNITIVE INTER-CELL INTERFERENCE CONTROL METHOD AND APPARATUS - Provided is a cognitive inter-cell interference control method and apparatus. Inter-cell interference may be measured based on various methods in order to recognize an interference channel, and an appropriate interference control algorithm may be applied to the interference channel by modeling based on overhead. Accordingly, interference may be controlled. | 12-15-2011 |
20110306762 | ACID ADDITION SALT OF UDENAFIL, PREPARATION METHOD THEREOF AND PHARMACEUTICAL COMPOSITION COMPRISING THE SAME - The present invention provides an acid addition salt of Udenafil, a preparation method thereof and a pharmaceutical composition comprising the same. The acid addition salt of Udenafil in which Udenafil is bonded to an organic acid selected from the group consisting of oxalic acid, benzenesulfonic acid, camphorsulfonic acid, cinnamic acid, adipic acid and cyclamic acid, has excellent solubility in an aqueous medium, water stability and crystallinity, thereby being suitably applied for a pharmaceutical composition. | 12-15-2011 |
20110319118 | METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN WIRELESS NETWORK - A method and apparatus for controlling transmission power in a wireless network area is provided. A target base station may control transmission power in cooperation with a neighboring base station and, thus, a satisfaction with a Quality of Service (QoS) of target terminals may be improved. Additionally, the target base station may determine whether to control the transmission power in cooperation with the neighboring base station, based on a possible improvement in satisfaction with the QoS of the target terminals. | 12-29-2011 |
20120034925 | COMMUNICATION METHOD OF MACRO BASE STATION AND MICRO BASE STATION FOR INTERFERENCE CONTROL - A communication method of a micro base station for interference control is provided. The communication method includes determining whether to perform a handover of macro user equipment from a macro base station to a micro base station based on interference from the macro user equipment served by the macro base station to micro user equipment served by the micro base station, searching for an index of a resource allocable to the macro user equipment, and transmitting, to the macro base station, a handover request message including the index of the resource allocable to the macro user equipment. | 02-09-2012 |
20120040706 | SYSTEM AND METHOD FOR ALIGNING INTERFERENCE IN UPLINK - Provided is a method of generating a transmit beamforming vector and a receive beamforming vector to substantially eliminate the effect of interference transmitted from macro terminals to a pico base station in a hierarchical cell environment. Also, provided is a method of selecting, from a plurality of macro terminals, a macro terminal for transmitting data to a macro base station. | 02-16-2012 |
20120077485 | METHOD AND APPARATUS FOR DETERMINING DOWNLINK BEAMFORMING VECTORS IN HIERARCHICAL CELL COMMUNICATION SYSTEM - Provided is a method and apparatus for determining a downlink beamforming vector in a hierarchical cell communication system. Small base stations may determine transmit beamforming vectors of the small base stations so that interference from the small base stations may be reduced in a macro terminal. A macro terminal and small terminals may determine receive beamforming vectors based on the transmit beamforming vectors of the small base stations. A macro base station may determine a transmit beamforming vector based on effective channels to terminals using the receive beamforming vectors of the terminals. | 03-29-2012 |
20120077511 | METHOD AND APPARATUS FOR ALIGNING INTERFERENCE USING A FEED FORWARD INDEX IN A HIERARCHICAL CELL COMMUNICATION SYSTEM - Provided is an interference aligning method and apparatus that does not perform full feed-forwarding in a hierarchical cell communication. A macro base station may generate respective transmission beamforming vectors of macro terminals to null interference channels to pico terminals and to remove interference among the macro terminals. The effective interference channels are based on reception beamforming vectors of the pico terminals. The macro base station may transmit, to a macro terminal, a feed-forward indicator (FFI) indicating a method of transmitting information associated with a reception beamforming vector of the macro terminal. The macro terminal may obtain information associated with the reception beamforming vector based on the FFI. | 03-29-2012 |
20120083282 | COMMUNICATION METHOD OF MACRO BASE STATION, MACRO TERMINAL, MICRO BASE STATION, AND MICRO TERMINAL FOR INTERFERENCE CONTROL IN HIERARCHICAL CELLULAR NETWORK - A communication method of a macro base station, a macro terminal, a micro base station, and a micro terminal determines an interference control scheme for each interference condition between a micro cell and a micro cell and between a macro cell and a micro cell in a hierarchical cellular network, and controls interference in the hierarchical cellular network where a detailed operation for each determined interference control scheme, a message associated with the detailed operation, and a resource management scheme are defined. | 04-05-2012 |
20120122502 | METHOD AND APPARATUS OF CONTROLLING INTER CELL INTERFERENCE BASED ON COOPERATION OF INTRA CELL TERMINALS - Provided is a method and apparatus for controlling inter cell interference based on cooperation between intra cell terminals. The intra cell terminals may exchange interference channel information, and may determine a receive beamforming vector based on the exchanged interference channel information. At least one intra cell terminal may feed back, to a neighboring cell base station, information associated with an effective interference channel using the receive beamforming vector. A base station may determine a transmit beamforming vector based on information associated with an effective interference channel using receive beamforming vectors of neighboring cell terminals that are received from at least one neighboring cell terminal. | 05-17-2012 |
20120149425 | METHOD AND APPARATUS FOR DISTRIBUTED TRANSMISSION POWER CONTROL IN WIRELESS NETWORKS - Provided is a method and apparatus for distributed transmission power control in a wireless network. The method and apparatus for distributed transmission power control may substantially maximize a minimum value of a transmission rate of each transmitter by controlling a transmission power of each transmitter. The transmission power may be controlled so that transmission rates of transmitters are substantially identical to each other. If the transmission rate is less than a requested transmission rate, the method and apparatus may change a resource of a transmitter that uses a substantially maximum power. | 06-14-2012 |
20120155300 | COMMUNICATION METHOD OF A BASE STATION AND A TERMINAL - Provided is a communication method of a base station and a terminal for enhancing a recovery performance of a signal using a feedback control message. The feedback control message may include information about a target received power at the base station with respect to feedback information of each of a plurality of terminals and information associated with a feedback mode of the feedback information. | 06-21-2012 |
20120157139 | COMMUNICATION METHOD OF NEIGHBORING TERMINAL AND TARGET TERMINAL - Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station. | 06-21-2012 |
20120214497 | APPARATUS AND METHOD FOR HIERARCHICAL RATE SPLITTING IN HIERARCHICAL CELL COMMUNICATION SYSTEM - Provided is a hierarchical rate splitting method and apparatus in a hierarchical cell communication system. An upper node or a macro base station may adaptively determine a hierarchical splitting mode based on a channel condition of a channel between the macro base station and a macro terminal and/or a performance of pico terminals in comparison to a performance of the macro terminal. | 08-23-2012 |
20130003638 | METHOD AND APPARATUS FOR COOPERATIVE SCHEDULING USING INTEREFERENCE BETWEEN MULTIPLE POINTS - A method and an apparatus are described for a cooperative scheduling using interference between multiple points. For each link, a cooperation set is set including cooperation links for a cooperative scheduling. A cooperation session map is generated that defines a cooperation link selected from the cooperation set for each link in each session of a network. A cooperation group is determined to be scheduled simultaneously using the cooperation session map. | 01-03-2013 |
20130039256 | RELAY AND METHOD FOR PERFORMING NETWORK CODING - Provided is a method and relay that performs network coding. The relay may determine transmission and/or receiving beamforming vectors for terminals so as to align effective channels of a plurality of transmit-and-receive pairs into different dimensions. | 02-14-2013 |
20130039265 | RELAY AND TERMINAL IN MULTI-PAIR TWO-WAY RELAY NETWORK AND COMMUNICATION METHOD THEREOF - A relay and a terminal in a multi-pair two-way network and a communication method thereof is provided. A communication method of a relay of a network including K transmit-and-receive pairs including a plurality of terminals, with the relay including M antennas and each of the terminals including N antennas, including accessing a codebook including codewords, the codebook being configured to enable effective channels from the K transmit-and-receive pairs to the relay to be aligned in independent dimensions, respectively, when the K transmit-and-receive pairs transmit signals simultaneously, each of the effective channels being aligned based on one of the codewords, selecting one or more of the codewords indicating the effective channels from the K transmit-and-receive pairs to the relay, respectively, and transmitting information associated with the selected codewords to corresponding ones of the K transmit-and-receive pairs. | 02-14-2013 |
20130089023 | RELAY NODE AND METHOD FOR MANAGING INTERFERENCE IN A MULTI-HOP NETWORK - A method and system of a relay node managing interference in a multi-hop network and a relay node that manages interference is provided. The relay node may determine whether an interference neutralization condition for neutralizing interference among pairs of transmitting nodes and receiving nodes is satisfied, select one of a full interference neutralization and a partial interference neutralization, based on a result of the determination and perform the selected interference neutralization with respect to the pairs of the transmitting nodes and the receiving nodes. | 04-11-2013 |
20130142105 | COMMUNICATION METHOD IN RELAY NODES AND DESTINATION NODES FOR ALIGNED INTERFERENCE NEUTRALIZATION IN INTERFERENCE CHANNEL - A communication method in relay nodes and destination nodes for neutralization of aligned interferences in an interference channel is provided. A communication method of a first relay node in a network including a first source node, the first relay node, a first destination node, a second source node, a second relay node, and a second destination node, includes receiving, from the first source node, streams X and Y. The communication method further includes receiving, from the second source node, a stream Z. The communication method further includes generating a signal in which the streams Y and Z are aligned in a space. The communication method further includes transmitting, to the first destination node and the second destination node, the stream X and the signal. | 06-06-2013 |
20130182689 | SYSTEM AND METHOD USING A RATE SPLIT SCHEME BASED ON COOPERATION BETWEEN RECEIVERS - Each of a first transmitter and a second transmitter uses a rate split scheme. Each of the first transmitter and the second transmitter may transmit at least four sub-messages, and different transmission powers may be allocated to the at least four sub-messages. Also, each of receivers may cooperate with each other, may share sub-messages that act as interferences, and may extract desired messages using the shared sub-messages. | 07-18-2013 |
20130208781 | TRANSMITTER AND RECEIVER FOR FREQUENCY DOMAIN EQUALIZATION - A transmitter and/or receiver for performing frequency domain equalization is provided. A transmitter includes a pilot position determination unit for determining positions for inserting pilots in a frequency domain based on frequency spectrums of data, and a pilot insertion unit for inserting the pilots between the frequency spectrums of the data according to the determined positions for inserting the pilots. | 08-15-2013 |
20130237274 | COMMUNICATION SYSTEM FOR INTER-CELL COORDINATION - System and methods for intercell coordination are provided. The system includes a macro terminal and a macro base station that allocate a radio resource for a sounding signal and determine a pattern of a sounding signal, in advance. The macro base station provides a femto base station included in the system with information about the pattern of the sounding signal, and the information about the radio resource of the sounding signal. The femto base station may receive the sounding signal from the macro terminal based on the information, and thus, the femto base station may determine whether the macro terminal exists and may determine a channel between the macro terminal and the femto base station. | 09-12-2013 |
20130265872 | SCHEDULING METHOD AND APPARATUS BASED ON PHYSICAL LAYER NETWORK CODING FOR BIDIRECTIONAL TRAFFIC - A scheduling method and a scheduling apparatus based on physical layer network coding for bidirectional traffic are provided. The method includes setting up paths passing through a node to perform the physical layer network coding of the bidirectional traffic of sessions that pass through the node. The method further includes requesting, from neighboring nodes of the node, information to be used to schedule the sessions for the physical layer network coding. The method further includes scheduling the sessions for the physical layer network coding based on a queue differential of each session that is calculated based on the information, and a rate of each link of each session. | 10-10-2013 |
20140073332 | MULTI-CELL COMMUNICATION METHOD AND SYSTEM OF A MOBILE TERMINAL, A MICRO BASE STATION, AND A MACRO BASE STATION - Communication methods of a macro base station which collects position information about a mobile micro base station and that is served by the macro base station, predicts a channel between the macro base station and the micro base station, and performs a handover between the macro base station and the micro base station based on a state of the predicted channel is provided. | 03-13-2014 |
20140112340 | SOURCE, RELAY, AND DESTINATION EXECUTING COOPERATION TRANSMISSION AND METHOD FOR CONTROLLING EACH THEREOF - A method for controlling a first node transmitting a transmission message to a plurality of second nodes may be provided. The method includes dividing the transmission message into at least one sub-message, encoding the at least one sub-message to a data stream, determining a first transmission direction of the data stream toward at least one of the plurality of second nodes, based on a polynomial of a channel gain between the first node and the at least one of the plurality of second nodes, and transmitting the data stream to the at least one of the plurality of second nodes, based on the determined first transmission direction. | 04-24-2014 |
20140146684 | METHOD AND SYSTEM FOR RELAYING DATA USING A PLURALITY OF RELAY NODES - Provided is a method and system for relaying data using a plurality of relay nodes. The method may include obtaining a first channel matrix related to a first-hop channel and a second channel matrix related to a second-hop channel, generating an effective interference channel matrix based on the first channel matrix and the second channel matrix, and calculating a null space vector of the effective interference channel matrix. | 05-29-2014 |
20140169262 | COMMUNICATION METHOD AND APPARATUS FOR MULTI-HOP MULTI-SESSION TRANSMISSION - A communication method for multi-hop multi-session transmission, includes forming groups of links operating in cooperation with one another to transmit data concurrently over sessions via relays, controlling interference between the groups, and scheduling the links for the sessions. | 06-19-2014 |
20140171094 | METHOD OF MULTI-HOP COOPERATIVE COMMUNICATION FROM TERMINAL AND BASE STATION AND NETWORK FOR MULTI-HOP COOPERATIVE COMMUNICATION - A method of multi-hop cooperative communication includes recognizing a plurality of relays capable of cooperating with one another to amplify or quantize and forward mixed signals received from a plurality of different nodes, selecting a transmission mode from a direct mode for transmission from a base station directly and a cooperation mode for transmission from the base station via the plurality of relays, transmitting data from the base station directly to a terminal through a first radio resource in the direct mode in response to the selected transmission mode being the direct mode, and transmitting data from the base station to the terminal via the plurality of relays through a second radio resource in the cooperation mode in response to the selected transmission mode being the cooperation mode. | 06-19-2014 |