Patent application number | Description | Published |
20110070884 | METHOD FOR MULTI-POINT COOPERATION CONSIDERING DELAY IN WIRELESS COMMUNICATION SYSTEM - Provided is a method of a multi-node cooperation considering a delay in a wireless communication system. A frame format may perform scheduling so that uplink cooperation terminals having a similar delay attribute may be classified into an uplink cooperation zone, to thereby prevent interference between the uplink cooperation zone and a non-cooperation zone. An extended cyclic prefix may be applied according to a delay attribute occurring due to an application of the multi-node cooperation. A cooperation base station of an uplink and a downlink may be determined based on the extended cyclic prefix. | 03-24-2011 |
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 |
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 |
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 |
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 |
20110306324 | COMMUNICATION METHOD OF A MOBILE TERMINAL AND METHOD OF ADVERTISING TO A MOBILE TERMINAL - A communication method of a macro base station including reporting information about a broadcast channel section in order to identify a femtocell in the macrocell, is provided. The macro base station receives position information of a mobile terminal and a request for information about neighboring femto base stations from the mobile terminal, when the mobile terminal identifies an accessible femto base station in the broadcast channel section. The macro base station generates a list of the neighboring femto base stations and information about the neighboring femto base stations based on the position information of the mobile terminal, and transmits the list and the information about the neighboring femto base stations to the mobile terminal. | 12-15-2011 |
20110319106 | METHOD FOR GROUPING ACCESS POINTS IN HIGH SPEED MOBILE ENVIRONMENT AND COMMUNICATION SYSTEM USING THE METHOD - Provided is an access point grouping method to be performed in a high speed mobile environment and a communication system using the access point grouping method. A system capacity may be improved by grouping users having different movement speeds with respect to various channel environments classified based on existence of an LOS channel, and by performing beamforming. Channel information with respect to a user moving at a high speed may not be required, and thus overhead may be reduced. | 12-29-2011 |
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 |
20120087303 | COMMUNICATION METHOD OF A VEHICULAR ACCESS POINT, A VEHICULAR USER EQUIPMENT, AND A MACRO BASE STATION - Provided is a communication method of a vehicular access point, a vehicular user equipment, and a macro base station for a user present in a vehicle capable of effectively forming an operational relationship between the vehicular access point and the macro base station using a plurality of operational modes. The plurality of operational modes may be differentiated based on an operation of the vehicular access point and the macro base station, and are capable of transitioning the vehicular access point from an active state to an idle state by a triggering with respect to the vehicular access point. | 04-12-2012 |
20120093043 | MULTI-CELL COMMUNICATION SYSTEM THAT PERFORMS INTERFERENCE CONTROL USING RELAY OF TERMINAL - A multi-cell communication system comprises at least a first base station and first terminal and a second base station and second terminal. When the first and second base stations need to perform interference control, the first terminal may relay a message related to the interference control between the first base station and the second base station. That is, the first terminal may transfer a message related to the interference control from the first base station to the second base station, and a message related to the interference control from the second base station to the first base station. As such, the first base station and the second base station can transmit/receive messages that are for performing interference control via the first terminal. | 04-19-2012 |
20120108257 | COMMUNICATION METHOD OF BASE STATION AND TARGET TERMINAL - Provided is a communication method of a base station and a target terminal. Resources used for a channel feedback may be reduced by determining a wireless resource based on information about a channel and information about a mobility of the target terminal in each of at least one route, and by feeding back channel state information. | 05-03-2012 |
20120113838 | COMMUNICATION METHOD OF A MACRO BASE STATION, A VEHICULAR MOVING RELAY, AND A VEHICULAR MOVING TERMINAL - Provided are examples of methods of a vehicular moving relay in a communication system including the vehicular moving relay, a moving terminal, and a macro base station. Also provided is an example of a terminal. The vehicular moving relay may repeatedly transmit data to a vehicular moving terminal without requesting a handover from a macro base station to the vehicular moving relay, using a unique code that is allocated to the vehicular moving terminal from the macro base station. | 05-10-2012 |
20120129532 | METHOD AND SYSTEM FOR SUPPORTING HANDOVER BETWEEN MACRO BASE STATION AND VEHICULAR BASE STATION - Provided are a method and system for handing over a mobile terminal between a macro base station and a vehicular base station to secure a communication service of a movable mobile terminal in a wireless communication system supporting a vehicular base station such as a vehicular relay station. The mobile terminal may be handed over by selecting a network or a vehicular base station suitable to a mobility and type of communication. | 05-24-2012 |
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 |
20130156191 | COMMUNICATION SECURITY METHOD AND APPARATUS OF FIRST NODE AND SECOND NODE COMMUNICATING BASED ON FULL DUPLEX COMMUNICATION SCHEME USING NEAR FIELD - A communication security method and apparatus of a first node and a second node are provided. The first node and the second node communicate with each other based on a full duplex communication scheme using a near field. In the communication security method and apparatus, information to be transmitted may be encrypted based on received information and the encrypted information may be transmitted, in a TX node and an RX node. The communication security method and apparatus prevent an additional node from decrypting the information, and ensure transmission and reception of reliable data. In addition, the communication security method and apparatus prevent information from being decrypted in a physical layer, by periodically or aperiodically exchanging a new encryption key. | 06-20-2013 |
20130225104 | METHOD OF MODULATION AND DEMODULATION FOR NANO COMMUNICATION, AND RECEIVER USING THE METHOD - A receiver for nano communication includes a power source including a cathode and an anode; a cathode unit connected to the cathode of the power source, the cathode unit including a nano device configured to receive a wireless signal modulated according to a predetermined modulation scheme, have at least two different resonant frequencies, and resonate based on a frequency of the wireless signal and the at least two different resonant frequencies; and an anode unit connected to the anode of the power source, the anode unit being configured to detect electrons emitted from the nano device, and demodulate a the wireless signal based on a pattern of the detected electrons. | 08-29-2013 |
20130343479 | METHOD OF TRANSMITTING SECRET INFORMATION AT TRANSMITTING END AND METHOD OF RECEIVING SECRET INFORMATION AT RECEIVING END, BASED ON MIMO MULTIPLEXING USING ANTENNAS - A method of transmitting secret information in a transmitting end and a method of receiving secret information at a receiving end, based on multi-input multi-output (MIMO) multiplexing using antennas, are provided. The method of transmitting includes selecting one or more indices of the secret information that correspond to at least one receiving antenna among receiving antennas, and mapping the one or more indices to an information vector. The method of transmitting further includes precoding the information vector based on channel information between transmitting antennas and the receiving antennas, and beamforming the precoded information vector, using the transmitting antennas. | 12-26-2013 |
20130343541 | METHOD AND APPARATUS FOR SECURE COMMUNICATION AND DETERMINING SECRET INFORMATION - A method of secure communication in a transmitter, includes determining a method of generating a training sequence that is shared with a receiver. The method further includes generating the training sequence based on the method of generating the training sequence, and secret information. The method further includes communicating with the receiver based on channel information derived from the training sequence. | 12-26-2013 |
20130346212 | COMMUNICATION METHOD OF A MOBILE TERMINAL AND METHOD OF ADVERTISING TO A MOBILE TERMINAL - A communication method of a macro base station including reporting information about a broadcast channel section in order to identify a femtocell in a macrocell of the macro base station set in a downlink broadcast channel of the macrocell, is provided. The macro base station receives position information of a mobile terminal and a request for information about neighboring femto base stations from the mobile terminal, when the mobile terminal identifies an accessible femto base station among the at least one femto base station in the broadcast channel section. The macro base station generates a list of the neighboring femto base stations of the mobile terminal and information about the neighboring femto base stations based on the position information of the mobile terminal, and transmits the list of the neighboring femto base stations and the information about the neighboring femto base stations to the mobile terminal. | 12-26-2013 |
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 |
20140133382 | BASE STATION AND A PLURALITY OF MEMBER NODES FOR TRANSMITTING AND RECEIVING NETWORK CODING BASED MULTICAST TRAFFIC - Provided are a base station and a plurality of member nodes for transmitting and receiving network coding based multicast traffic. The base station may transmit multicast traffic, and the member node may transmit an acknowledgement (ACK) signal based on received multicast traffic. A determination made be made as to whether the multicast traffic is to be retransmitted, based on a number of member nodes transmitting ACK signals. | 05-15-2014 |
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 |
20140254460 | APPARATUS AND METHOD FOR TRANSMITTING DATA BASED ON COOPERATION OF MEMBER NODES BELONGING TO MULTICAST GROUP - Methods and apparatuses for transmitting data based on cooperation of member nodes belonging to a multicast group is provided. The method may include transmitting multicast packets through a first communication network to member nodes belonging to a multicast group and the member nodes receiving the same multicast packets; and retransmitting the multicast packets upon determination that no member node has completed reception of the multicast packets. | 09-11-2014 |
20140256339 | APPARATUS AND METHOD FOR TRANSMITTING DATA BASED ON COOPERATION OF DEVICES FOR SINGLE USER - A method of transmitting data using devices for a single user, the devices including a master device being in a used state and at least one slave device being adjacent to the master device and in an idle state, includes identifying devices for a single user, the devices comprising a master device in a used state and at least one slave device in an idle state; calculating, at a base station, a data transmission rate based on information received from the devices; and transmitting data to the devices according to the data transmission rate. | 09-11-2014 |
20140269548 | METHOD TO MANAGE INTERFERENCE BETWEEN IDLE DEVICES - A method and apparatus to manage interference between idle devices is provided. The method may include determining a pair of a target transmission node and a target reception node among nodes included in a multi-hop network. The method includes determining idle devices cooperating to manage interference in the communication based on a transmission mode determined for communication. The method determines and transmitting coordination information for communication between the pair of the target transmission node and the target reception node, to nodes participating in the communication and the cooperating idle devices. | 09-18-2014 |
20140355513 | METHOD AND APPARATUS TO CONTROL INTERFERENCE IN MULTI-HOP NETWORK AND RELAY NODE AND NODE PAIR USING THE METHOD - A method and apparatus to control interference in a relay node are provided and include simultaneously receiving a symbol from source nodes, adjusting channel coefficients; and relaying the symbol to destination nodes with adjusted channel coefficients. The simultaneously receiving and the relaying are performed during a symbol transmission process between the source and destination nodes. | 12-04-2014 |
20140355514 | METHOD OF CONTROLLING INTERFERENCE IN MULTI-HOP NETWORK BASED ON MIMO SYSTEM AND RELAY NODE AND NODE PAIR USING THE METHOD - A method of controlling interference of relay nodes and node pairs in a multi-hop network, includes relaying signals received from source nodes among the node pairs to destination nodes pairing with the source nodes, and cancelling a part of interference signals between the node pairs by controlling channel coefficients of the relay nodes. The destination nodes are configured to cancel residual interference signals among the interference signals, using the signals received by the destination nodes. | 12-04-2014 |
20150043385 | COMMUNICATION METHOD AND APPARATUS FOR DEVICE-TO-DEVICE (D2D) - Provided are a communication method and apparatus for device-to-device (D2D). More particularly, the communication method for D2D includes configuring a network topology using at least one cooperating base station to communicate among devices included in multiple heterogeneous cells, creating an association between multiple device pairs and at least one base station based on configuring the network topology, and determining a cooperation context for communication among the multiple device pairs is provided. The communication apparatus carries out such a method. | 02-12-2015 |