Patent application number | Description | Published |
20090190560 | UPLINK SYNCHRONIZATION REQUEST METHOD IN MOBILE COMMUNICATION SYSTEM, CDMA ALLOCATION IE THEREOF, AND APPARATUS USING THE SAME - The present invention relates to an uplink synchronization request method in a mobile communication system, a CDMA allocation information element structure thereof, and an apparatus using the same. For this purpose the uplink synchronization request method includes: when up-link traffic is generated, determining whether an uplink synchronization error occurs; when the uplink synchronization error occurs, calculating a timing adjustment value; and transmitting a bandwidth request code including the calculated timing adjustment value to a base station and performing a band-width request. According to the present invention, the PSS compares a reference adjustment value and an arrival time of a downlink preamble to calculate uplink synchronization timing and synchronize an uplink of the PSS that requests bandwidth allocation through a bandwidth request ranging process to thereby maximize resource use efficiency in the uplink synchronization. | 07-30-2009 |
20100009688 | METHOD OF OPERATING RANDOM ACCESS CHANNEL IN MOBILE COMMUNICATION SYSTEM - A random access channel operating method in a mobile communication system is provided. The random access channel operating method includes: (a) selecting a transmission mode according to a load of random access channel and performing transmission to a mobile terminal; (b) receiving a message having a format corresponding to the selected transmission mode from the mobile terminal; (c) determining whether or not a preamble or data is included in the message received in (b) receiving of the message; and (d) if the data is determined to be included in the (c) determining, transmitting a response message for data reception to the mobile terminal. Accordingly, use efficiency of a random access channel can be increased by measuring a system load of the random access channel in a base station and changing a transmission format of a burst transmitted through the random access channel according to the measured load level. | 01-14-2010 |
20100020758 | RADIO RESOURCE REALLOCATING METHOD FOR CIRCUIT MODE - The present invention relates to a radio resource reallocation method based on the circuit mode. In order to efficiently use the radio resource in the packet-based data transmission system, a circuit mode radio resource is reallocated based on a rearrangement information element and a rearrangement counter information element by using the circuit mode. Accordingly, an unused region of the discontinuous radio resource that can be generated by resource de-allocation and resource change can be eliminated, and a resource allocation mismatch that can be generated by a MAP receiving error can be solved. | 01-28-2010 |
20100113049 | METHOD AND DEVICE FOR MANAGEMENT OF FEMTO BASE STATION - A method for management of a base station according to the present invention includes: entering a first interval when a terminal is not present in a region of a first cell managed by the base station; receiving an interval switching request when the terminal enters a second cell that is larger than the first cell while including the first cell; and switching into a second interval other than the first interval in accordance with the interval switching request. | 05-06-2010 |
20100144338 | POWER CONTROL AND RESOURCE MANAGEMENT METHOD OF FEMTOCELL BASE STATION IN WIDEBAND WIRELESS ACCESS SYSTEM - Provided is a power control method and resource management method of a femtocell base station in a wideband wireless access system. A macrocell base station receives received signal strength from a femtocell base station in a macrocell of the macrocell base station, compares it with received signal strength reported by a terminal in the macrocell, and when a difference between the two received signal strength is less than a threshold value, it receives received signal strength on a signal received by the terminals in the macrocell from the corresponding femtocell base station. Further, the macrocell base station determines whether the corresponding macrocell terminal is located in the coverage of the femtocell base station based on the reported received signal strength of the femtocell base station, and transmits information for controlling power of the femtocell base station or managing a radio resource to the femtocell base station according to the determination result. | 06-10-2010 |
20100220691 | METHOD AND APPARATUS FOR TRANSMITTING BROADCASTING INFORMATION - In a method of transmitting broadcasting information, the broadcasting information is classified into fixed broadcasting information for transmitting to a fixed position of a super-frame and variable broadcasting information to be variably transmitted in the form of a broadcasting message. The fixed broadcasting information may be classified into primary broadcasting information having a short cycle and secondary broadcasting information having a long cycle. | 09-02-2010 |
20100246531 | METHOD FOR TRANSMITTING SIGNALS - A signal receiving method includes allocating a communication resource corresponding to a mobile station over a plurality of frames, transmitting allocation information on the communication resource to the mobile station, and receiving a transmitted signal through the communication resource. Therefore, the resource allocated on the frequency axis is minimized by allocating the resource to the mobile station over a plurality of frames, and the resource is allocated within the limited power of the mobile station, thereby improving radio performance. | 09-30-2010 |
20100278063 | METHOD FOR CONTROLLING INTERFERENCE - A method for controlling interference between a plurality of neighboring base stations for a terminal by a serving base station of the terminal in a communication system is provided. The method includes receiving interference amount information on a first region of a downlink frame from the terminal, determining an interference amount estimate for the first region based on the received interference amount information, comparing the determined interference amount estimate with an interference amount tolerance for the first region; and transmitting an interference indicator requesting reduction in transmission power for the first region to the plurality of neighboring base stations when the interference amount estimate exceeds the interference amount tolerance. | 11-04-2010 |
20100279700 | RESOURCE ALLOCATION AND POWER CONTROL METHOD - A method for controlling transmission power in a mobile communication system is provided. According to the method, a serving base station arranges a plurality of terminals in ascending order according to Carrier-to-Interference-and-Noise-Ratios (CINRs) based on the CINR measured by the plurality of terminals, classifies the plurality of terminals in one of a first group and a second group according to the order, allocates a subchannel of a data region corresponding to the first group from among a plurality of data regions included in the uplink frame to a terminal classified as the first group, and allocates a subchannel of a data region corresponding to the second group from among the data regions to a terminal classified as the second group. | 11-04-2010 |
20110028175 | Device for managing of base station and method for managing thereof - A management device of a stopping or moving base station includes: an information acquisition unit that acquires first information about wireless environment from a neighboring base station and that acquires second information about the wireless environment by connecting to a backbone network; a position estimating unit that estimates a position of the neighboring base station based on the first information; and an operation condition selection unit that selects radio resources based on at least one of the first information and the second information. | 02-03-2011 |
20110044281 | METHOD OF TRANSMITING CONTROL INFORMATION AND TERMINAL THEREOF - A terminal transmits control information to a base station by using a periodically allocated dedicated channel. In further detail, the terminal checks control information that needs to be transmitted, detects a priority of the checked control information, and selects control information to be transmitted to the base station based on the detected priority. The terminal forms a PDU by multiplexing the selected control information, and transmits the PDU to the base station. | 02-24-2011 |
20110126069 | METHOD AND APPARATUS FOR CONTROLLING RETRANSMISSION - In a retransmission control method, a HARQ process is performed by transmitting a HARQ burst to a receiving side. When the HARQ process for the HARQ burst is terminated with unsuccessful transmission of the HARQ burst, transmission of an ARQ block corresponding to the HARQ burst is initiated. | 05-26-2011 |
20110141933 | METHOD AND APPARATUS FOR CONTROLLING POWER FOR UPLINK - A method and apparatus for controlling power for uplink are provided. When a base station is moving or unable to communicate with others, at least one interference amount is estimated for a neighboring base station based on a path gain between a terminal and the neighboring base station and a transmission power of each encoding packet size and transmission format included in a candidate group related to scheduling transmission power parameters. A target interference amount is determined based on an interference amount control value and an initial target interference amount according to a processing load of a serving base station, and one interference amount is selected from estimated interference amounts based on the target interference amount. The terminal determines the transmission power based on an encoding packet size and a transmission format corresponding to the selected interference amount. | 06-16-2011 |
20120087287 | METHOD FOR CONTROLLING POWER SAVING MODE IN GROUP COMMUNICATION - A method of controlling power saving modes of a plurality of terminals joining in a group communication by a base station is provided. The base station establishes a group call connection with the plurality of terminals, and establishes a same power saving mode pattern for the plurality of terminals. | 04-12-2012 |
20120106516 | METHOD AND APPARATUS FOR TRANSMITTING NEIGHBOR BASE STATION INFORMATION PERFORMED BY MACRO BASE STATION IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for requesting neighbor base station information by user equipment in a wireless communication system. The method includes: searching neighbor base stations targeted for a handover; transmitting a list request message including preamble information about a neighbor base station searched by the user equipment among the neighbor base stations and a neighbor base station list request indicator indicating a request for information about the neighbor base station to a serving base station; and receiving a list response message including an identification information and system information of the neighbor base station from the serving base station. | 05-03-2012 |
20120157131 | METHOD OF LOW-DUTY MODE OPERATION OF FEMTOCELL BASE STATION - A method of setting a cycle of a low-duty mode in a femto base station is provided. The cycle of the low-duty mode has a pattern in which an available interval and an unavailable interval repeatedly appear, and the available interval is set to include a paging listening interval of a paging cycle. A method of setting a cycle of a low-duty mode in a femto base station having a service area overlapping with that of a macrocell is provided. An unavailable interval is set by taking the overlapping degree of the service area of the femto base station with the macrocell into consideration. A method of setting a cycle of a low-duty mode in a plurality of femto base stations operated in the low-duty mode is provided. The same cycle can be set for a plurality of base stations. | 06-21-2012 |
20120163276 | METHOD AND APPARATUS FOR ALLOCATING MULTICAST RESOURCE AND METHOD AND APPARATUS FOR RECEIVING MULTICAST RESOURCE ALLOCATION INFORMATION - A method of allocating a multicast resource to a multicast group for a multicast communication in a base station is provided. The base station persistently allocates the multicast resource to the multicast group, generates a MAP IE including allocation information of the multicast resource, an allocation period indicating a period in which the multicast resource is allocated and a lifetime in which allocation of the multicast resource is maintained, and transmitting the MAP IE to the multicast group. | 06-28-2012 |
20120163277 | METHOD AND APPARATUS FOR ESTABLISHING MULICAST CONNECTION - A method of establishing a multicast connection is provided. A mobile station transmits a registration request message for a discovery of a multicast service to the base station, and receives a registration response message from the base station in response to the registration request message. The mobile station exchanges a DSA request message and a DSA response message to the DSA request message with the base station, for a multicast connection on the multicast service. The mobile station receives a downlink control channel including allocation information of multicast resource from the base station. | 06-28-2012 |
20120163278 | METHOD FOR PERFORMING DIRECT COMMUNICATION BETWEEN TERMINALS - A method for performing direct communication, by a first terminal, between terminals, includes transmitting a control message for a direct communication resource allocation to at least one second terminal through a first region included in a direct communication resource, transmitting synchronization information to at least one second terminal through a second region included in the direct communication resource, and transmitting a data packet to at least one second terminal through a third region included in the direct communication resource. | 06-28-2012 |
20120163283 | METHOD FOR RELAYING OF BASE STATION AND METHOD FOR RELAYING OF TERMINAL - A method of relaying in a base station that enable a first base station to operate as a relay station in order to communicate with a second base station that is connected to backhaul, the method includes: forming, by the first base station, a relay link with the second base station; and starting, by the first base station, a relay mode. | 06-28-2012 |
20120163600 | METHOD AND APPARATUS FOR SUPPORTING SECURITY IN MULITICAST COMMUNICATION - A method of supporting a security for a multicast communication is provided in a mobile station. The mobile station shares an MAK with a base station, derives a prekey based on a first parameter including the MAK, and derives a multicast security key including an MTEK based on a second parameter including the prekey, and decrypts a multicast traffic using the multicast security key. | 06-28-2012 |
20120172038 | METHOD FOR CONFIGURATION CELL BY MULTI MODE TERMINAL AND METHOD FOR OPTIMIZATION CELL BY MULTI MODE TERMINAL - A method of configuring a cell of a terminal includes: transmitting, by the terminal, when the terminal searches for an idle band, a downlink frame; performing a network entry procedure with other terminals at 1 hop from the terminal; and optimizing, by the terminal, transmission power. | 07-05-2012 |
20120188981 | SIGNALLING METHOD FOR DIRECT COMMUNICATION BETWEEN TERMINALS - A signaling method of a first terminal for direct communication between terminals includes transmitting a link establishment request message for establishing a direct communication link including flow information to a second terminal, receiving a link establishment response message for establishing a direct communication link including flow information from the second terminal, and establishing a direct communication link between the first terminal and the second terminal. | 07-26-2012 |
20120224472 | METHOD FOR RELAYING OF BASE STATION, METHOD FOR RELAYING OF TERMINAL AND METHOD FOR TRANSMITTING - A method of relaying in a base station (BS) includes: setting, when a backhaul link of a first BS is damaged, a relay link using a second BS, which is an adjacent BS of the first BS as a serving BS; and releasing the relay link after the backhaul link is recovered. | 09-06-2012 |
20120224522 | METHOD AND APPARATUS FOR MANAGING MULTICAST SERVICE - In a method of managing a multicast service, a mobile station receives a message including multicast service flow update information from a base station that belongs to a multicast group zone including a base station set having at least one base station. The mobile station updates a parameter associated with a multicast service flow of the multicast service based on the multicast service flow update information. The multicast service flow update information includes a new multicast group zone ID, current multicast service identification information, and new multicast service identification information mapped to the current multicast service identification information. | 09-06-2012 |
20120224546 | METHOD AND TERMINAL FOR PERFORMING DIRECT COMMUNICATION BETWEEN TERMINALS - A first terminal for performing direct communication between terminals includes: a radio frequency (RF) unit; and a processor, the processor being adapted to perform direct communication with at least one second terminal by using resources allocated for direct communication between terminals, wherein the resources are divided into a first slot region and a second slot region, the first slot region including a synchronization channel containing synchronization information for direct communication between terminals, a dedicated channel for transmitting direct communication data between terminals, and a supplementary channel one-to-one mapped with the dedicated channel, and the second slot region including the dedicated channel and the supplementary channel. | 09-06-2012 |
20120264430 | METHOD FOR COMMUNICATION OF BASE STATION, RELAY STATION AND TERMINAL - The present invention relates to a communication method of a base station, which includes the base station including an indication of whether the base station is a terminal acting as a base station or a base station acting as a relay station in an SCD message or DCD message, and transmitting the SCD message or the DCD message to a terminal. | 10-18-2012 |
20120281615 | METHOD FOR COMMUNICATION OF BASE STATION, TERMINAL AND RELAY STATION - A method for communication of a base station includes: receiving first data from a first terminal; transmitting the first data to a second terminal by local forwarding without passing through an access service network (ASN); receiving second data from the second terminal; and transmitting the second data to the first terminal without passing through the ASN. | 11-08-2012 |
20120294245 | METHOD AND TERMINAL FOR PERFORMING DIRECT COMMUNICATION BETWEEN TERMINALS - Disclosed is a method for a first terminal to perform direct communication between terminals, the method including performing direct communication with at least one second terminal by using resources allocated for direct communication between terminals, the resources including a synchronization channel used for frequency synchronization and time synchronization between terminals, and the synchronization channel including a synchronization channel preamble used for at least one of preamble detection, time offset estimation, frequency offset estimation, and channel estimation. | 11-22-2012 |
20130016646 | TERMINAL OF SUPPORTING DIRECT COMMUNICATION USING INFRA COMMUNICATION AND DIRECT COMMUNICATION METHOD OF THE SAMEAANM CHANG; Sung CheolAACI DaejeonAACO KRAAGP CHANG; Sung Cheol Daejeon KRAANM YUN; Mi YoungAACI DaejeonAACO KRAAGP YUN; Mi Young Daejeon KRAANM KIM; EunkyungAACI DaejeonAACO KRAAGP KIM; Eunkyung Daejeon KRAANM KIM; Sung KyungAACI DaejeonAACO KRAAGP KIM; Sung Kyung Daejeon KRAANM KIM; Won-IkAACI DaejeonAACO KRAAGP KIM; Won-Ik Daejeon KRAANM LEE; HyunAACI DaejeonAACO KRAAGP LEE; Hyun Daejeon KRAANM YOON; Chul SikAACI SeoulAACO KRAAGP YOON; Chul Sik Seoul KRAANM LIM; Kwang JaeAACI DaejeonAACO KRAAGP LIM; Kwang Jae Daejeon KRAANM KIM; SeokkiAACI Osan-siAACO KRAAGP KIM; Seokki Osan-si KR - A method in which a first terminal supports direct communication using infracommunication includes setting at least one direct communication link with at least one second terminal, setting at least one traffic connection with a base station, and forwarding data that is transmitted through the at least one direct communication link from the at least one second terminal to the at least one traffic connection or forwarding data that is transmitted through the at least one traffic connection from the base station to the at least one direct communication link. | 01-17-2013 |
20130017817 | METHOD FOR COMMUNICATION OF BASE STATION AND TERMINALAANM Kim; Won-IkAACI DaejeonAACO KRAAGP Kim; Won-Ik Daejeon KRAANM Kim; EunkyungAACI DaejeonAACO KRAAGP Kim; Eunkyung Daejeon KRAANM Kim; Sung KyungAACI DaejeonAACO KRAAGP Kim; Sung Kyung Daejeon KRAANM Chang; Sung CheolAACI DaejeonAACO KRAAGP Chang; Sung Cheol Daejeon KRAANM Cha; Jae SunAACI DaejeonAACO KRAAGP Cha; Jae Sun Daejeon KRAANM Yun; Mi YoungAACI DaejeonAACO KRAAGP Yun; Mi Young Daejeon KRAANM Lee; HyunAACI DaejeonAACO KRAAGP Lee; Hyun Daejeon KRAANM Yoon; Chul SikAACI SeoulAACO KRAAGP Yoon; Chul Sik Seoul KRAANM Lim; Kwang JaeAACI DaejeonAACO KRAAGP Lim; Kwang Jae Daejeon KR - A method of performing communication of a terminal includes the terminal transmitting state information thereof to a base station, and the terminal receiving a mode change request from the base station when the terminal is selected by the base station. | 01-17-2013 |
20130022199 | ENCRYPTION METHOD AND APPARATUS FOR DIRECT COMMUNICATION BETWEEN TERMINALS - A method for performing direct communication between terminals includes: a transmitting terminal's encrypting data using a direct communication transport encryption key (DTEK) for direct communication; and transmitting the encrypted data to a receiving terminal, wherein the DTEK is managed in an SA (security association) defined within the transmitting terminal or the receiving terminal. | 01-24-2013 |
20130064164 | METHOD AND APPARATUS FOR MANAGING MULTICAST SERVICE - A method of managing a multicast service is provided to a mobile station. The mobile station receives from a base station a message including information on a multicast indication cycle including a multicast available interval and a multicast unavailable interval. The mobile station receives a multicast indicator in the multicast available interval of the multicast indication cycle, and receives a multicast traffic at a transmission time indicated by the multicast indicator. | 03-14-2013 |
20130065634 | METHOD FOR COMMUNICATION OF TERMINAL AND METHOD FOR COMMUNICATION OF BASE STATION - A method for communication of a terminal and a method for communication of a base station are disclosed. Communication between a first base station with a problem in a backbone and a second base station located beyond the coverage of the degraded base station and neighboring the first base station is relayed by a terminal. Accordingly, the first base station is able to continuously provide service to subordinate stations. | 03-14-2013 |
20130077512 | METHOD AND TERMINAL FOR DIRECT COMMUNICATION BETWEEN TERMINALS - A direct communication method between terminals is provided. When a terminal receives a plurality of synchronization information parts, the terminal selects synchronization information to acquire a reference time among the plurality of synchronization information parts according to a priority. Here, the priority is an order of first synchronization information that is received from a base station, second synchronization information that is received from a global positioning system (GPS), and third synchronization information that is received from a terminal in which a hop count from the base station or the GPS is small. | 03-28-2013 |
20130107795 | COMMUNICATION METHOD OF RELAY, TERMINAL, AND COMMUNICATION METHOD OF THE TERMINAL | 05-02-2013 |
20130109298 | TERMINAL AND METHOD OF COMMUNICATING IN THE SAME | 05-02-2013 |
20130121236 | MULTICAST MANAGEMENT METHOD AND APPARATUS - A multicast management method of a base station is provided. The base station generates a CRC for a message including resource allocation information of a multicast group including a plurality of terminals, and masks the CRC by a CRC mask. The base station adds the masked CRC to the message, and then transmits the message to which the masked CRC is added to the multicast group. | 05-16-2013 |
20130130736 | GROUP COMMUNICATION METHOD AND APPARATUS - A group communication method of a terminal is provided. The terminal establishes a group call connection with a first base station belonging to a group call zone, and receives group call data from the first base station. When moving to the coverage area of a second base station belonging to the group call zone, the terminal receives group call data from the second base station. | 05-23-2013 |
20130176935 | TERMINAL AND COMMUNICATION METHOD THEREOF - A communication method of a terminal that can operate in a relay mode or a base station mode is provided. When the terminal, having received a service from a first base station, detects that a service connection to the first base station is unavailable, the terminal searches for a second base station, which is an available neighboring base station. The terminal transmits a ranging request message including a base station identifier of the first base station to the second base station. | 07-11-2013 |
20130177030 | METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION CHANNEL, AND METHOD AND APPARATUS FOR RECEIVING SYNCHRONIZATION CHANNEL - In a direct communication between terminals, a terminal transmits a synchronization channel preamble part after transmitting a synchronization channel message part including synchronization information. The terminal receives a dedicated channel including a direct communication packet after transmitting the synchronization channel preamble part. A transition time gap for switching from transmission to reception may be inserted to an end of the synchronization channel preamble part. | 07-11-2013 |
20130208584 | MOBILE STATION, BASE STATION, AND RELAY STATION FOR A WIRELESS ACCESS SYSTEM - Protocol structure of a mobile station, base station or relay station in a wireless access system is provided. The protocol structure includes a first function block configured to perform radio resource control and management as a MAC layer and to reside on a control plane, and a second function block configured to perform medium access control as the MAC layer and to reside on the control plane and a data plane. The first function block includes various function blocks for supporting high reliability. | 08-15-2013 |
20130235784 | METHOD AND APPARATUS FOR MANAGING MULTICAST RESOURCE - A method of managing a multicast resource is provided by a base station. The base station allocates a multicast resource to a multicast group. The base station generates a MAP IE including information of the multicast resource and a transmission indication for indicating whether the multicast resource is fragmented, and transmits the MAP IE to the multicast group. | 09-12-2013 |
20130286819 | MULTIMODE APPARATUS AND COMMUNICATON METHOD THEREOF - A multimode apparatus and a communication method thereof are disclosed. If the multimode apparatus is chosen to serve as a relay station due to a base station having a backhaul link problem, it sets up a first relay link with a first base station. Upon receiving a request for releasing the first relay link from the first base station even though the backhaul link is not restored, the multimode apparatus sets up a second relay link with a second base station, or configures and operates a standalone network or an independent network. | 10-31-2013 |
20130294233 | BASE STATION CONTROL METHOD FOR CONNECTION OF TERMINAL WITH HIGHER PRIORITY AND BASE STATION SUPPORTING THE SAME - A method of controlling a base station is disclosed that provides service to a first terminal and a second terminal having higher priority than the first terminal. The base station determines whether there is an influx of call connection attempts when the lower-priority terminal and the higher-priority terminal perform ranging. If it is determined that there is an influx of call connection attempts, the base station sets the initial ranging backoff window size included in an information element of S-SFH SP3 (Secondary-Superframe Header SubPacket3) to a first size. If it is determined that there is an influx of call connection attempts, the base station sets the initial ranging backoff window size for the second terminal in an AAI-SCD (Advanced Air Interface-System Configuration Descriptor) message to a second size. Accordingly, it is possible to achieve a high probability of success of initial ranging of a higher-priority terminal. | 11-07-2013 |
20130294330 | MOBILE RELAY STATION AND HANDOVER METHOD THEREOF - A mobile relay station (RS) and a handover method thereof are provided. When it is determined that a mobile RS performs handover from a superordinate base station (BS) to a target BS, information indicating admission of handover is received from the superordinate BS. The mobile RS transmits a service unavailability section to a subordinate terminal, whereby the subordinate terminal is prevented from performing handover to a different BS or a different RS. | 11-07-2013 |
20140016531 | METHOD OF DIRECT COMMUNICATION - Upon receiving a multicast packet from a base station, a forwarding terminal connected to the base station establishes a multicast connection with at least one direct communication terminal having a direct communication group identifier mapped to a multicast IP address of the multicast packet, and transmits the multicast packet to the at least one direct communication terminal, thereby providing multicast services to a direct communication terminal not connected to the base station. | 01-16-2014 |
20140016580 | METHOD AND APPARATUS FOR MANAGING RESOURCE - A method of managing a resource is provided by a base station. The base station allocates a resource to a terminal, and generates a downlink control channel including information of the allocated resource and a transmission time of a next downlink control channel. Further, the base station transmits the downlink control channel to the terminal. | 01-16-2014 |
20140016619 | METHOD AND APPARATUS FOR TRANSMITTING FRAMES IN TALK-AROUND DIRECT COMMUNICATION - A permutated channel structure based on a block structure in talk-around direct communication is provided. A dedicated subchannel interferes with only one adjacent dedicated subchannel, even with a large synchronization error, by permutating the dedicated subchannels by cyclic shifts, whereby diversity gain can be maintained and interference between adjacent channels can be minimized. | 01-16-2014 |
20140017991 | SIGNALLING METHOD FOR DIRECT COMMUNICATION BETWEEN TERMINALS - A signaling method for a terminal that performs direct communication between terminals terminal is disclosed. A transmitting terminal transmits a link establishment request message for establishing a link to a receiving terminal, and the receiving terminal transmits a link establishment response message responding to this message to the transmitting terminal. The link establishment request message includes a field indicating a flow to use if the receiving terminal acquires a token. | 01-16-2014 |
20140038580 | METHOD FOR COMMUNICATION OF BASE STATION AND TERMINAL - A method of performing communication of a terminal includes the terminal transmitting state information thereof to a base station, and the terminal receiving a mode change request from the base station when the terminal is selected by the base station. | 02-06-2014 |
20140071916 | APPARATUS AND METHOD FOR TRANSMITTING DISCOVERY SIGNAL - A device transmits a discovery signal including identification information of the device in an empty discovery slot among a plurality of discovery slots of a discovery interval. The discovery signal includes two orthogonal frequency division multiplexing (OFDM) symbols. One of the two orthogonal frequency division multiplexing (OFDM) symbols includes at least one tone. The identification information of the device is displayed by a position of a subcarrier corresponding to the at least one tone. | 03-13-2014 |
20140071917 | METHOD OF TRANSMITTING AND RECEIVING DATA IN TALK-AROUND DIRECT COMMUNICATION NETWORK - A method in which a transmitting terminal included in an talk-around direct communication (TDC) network transmits data includes: determining a data frame for transmitting the data; requesting to reserve a data transmission segment included in the data frame through a transmission request segment included in the data frame; receiving a response signal transmitted in a transmission response segment included in the data frame; and analyzing the response signal and transmitting the data through the data transmission segment. | 03-13-2014 |
20140112235 | DISCOVERY SIGNAL TRANSMITTED IN DIRECT COMMUNICATION SYSTEM, AND METHOD OF TRANSMITTING/RECEIVING THE DISCOVERY SIGNAL - A discovery signal that a first device joining in direct communication broadcasts through a radio channel is provided. The discovery signal includes a first field representing whether the discovery signal is a signal for discovering a device or a signal for discovering a service, and a second field including one of device identifier information of the first device and service information of a service that the first device provides according to a value of the first field. | 04-24-2014 |
20140211781 | SYNCHRONIZATION METHOD AND APPARATUS IN DEVICE-TO-DEVICE DIRECT COMMUNICATION - A synchronization method by a device is provided in a device-to-device direct communication. The device receives synchronization signals from a plurality of other devices at a current frame, and estimates a synchronization time at a next frame based on the synchronization signals received from the other devices. | 07-31-2014 |