Patent application number | Description | Published |
20090252333 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a group to which the first short sequence belongs, the wireless communication system using a plurality of short sequences and the plurality of short sequence being divided into a plurality of groups; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain. | 10-08-2009 |
20090252334 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain. | 10-08-2009 |
20090252335 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain. | 10-08-2009 |
20090252336 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by a short sequence group-a wireless communication system uses a plurality of short sequences and the plurality of short sequences are grouped into a plurality of short sequence group-to which the first short sequence is assigned; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain. | 10-08-2009 |
20100074199 | APPARATUS AND METHOD OF DISCOVERING NEIGHBOR CELL - A method of discovering a neighbor cell, the method including: determining whether a first Primary Synchronization Channel (PSCH) of a first cell in which a terminal is included is identical to a second PSCH of a second cell, and whether timings of the first cell and the second cell are synchronous; estimating third channel information of the second cell based on second channel information of the first cell from first channel information, when the first PSCH is identical to the second PSCH and the timings of the first cell and the second cell are synchronous, the second channel information being estimated using a first Secondary Synchronization Channel (SSCH) of the first cell, and the first channel information being estimated using the first PSCH and the second PSCH; and detecting a second SSCH of the second cell, and detecting a cell identifier (ID) of the second cell using the second SSCH. | 03-25-2010 |
20100075672 | MULTIPLE ANTENNA WIRELESS COMMUNICATION SYSTEM WHICH ADAPTIVELY DETERMINES DOWNLINK TRANSMISSION MODE - An operation method of a base station which adaptively determines a downlink transmission mode is provided. The operation method of the base station including: adaptively determining a downlink transmission mode based on at least one of a state of a channel between the base station and a terminal, and a number of receiving antennas, the number of receiving antennas being at least one and the receiving antennas being mounted on the terminal; selecting one of at least one type of feedback information which is fed back by the terminal based on the determined downlink transmission mode; and reporting type information associated with the selected type to the terminal. | 03-25-2010 |
20100150217 | CHANNEL ESTIMATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM HAVING DISPERSED PILOT - Provided are a channel estimation method and apparatus in mobile communication system having dispersed pilot. The channel estimation apparatus includes an entire band channel estimation unit and an edge channel estimation unit. The entire band channel estimation unit performs channel estimation on an entire frequency band. The edge channel estimation unit performs channel estimation on an edge region. By separately performing the gating operation of the entire band channel estimation unit and the gating operation of the edge channel estimation unit, a channel frequency response is more accurately calculated even in an edge region. | 06-17-2010 |
20110142142 | APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN CHANNEL DOMAIN - A method and apparatus for estimating a channel in a frequency domain are provided. The apparatus acquires frequency selectivity information using a cell-specific reference signal, selects a channel estimation scheme using a user specific reference signal according to the acquired frequency selectivity information, and estimates a frequency channel using the selected channel estimation scheme. Accordingly, more accurate channel estimation with respect to a region to which a physical downstream shared channel is allocated can be performed. | 06-16-2011 |
20110142157 | INTERLEAVING APPARATUS FOR IMPROVING TRANSMISSION PERFORMANCE AND INTERLEAVING METHOD USED BY THE INTERLEAVING APPARATUS - Provided are an interleaving apparatus for improving transmission performance and an interleaving method used by the interleaving apparatus. The interleaving apparatus determines the type of data at each element position of an interleaving matrix, reads encoded data, which corresponds to the determined type of data at each element position, from an encoder, rearranges the read data in an order determined by the interleaving matrix, and outputs the rearranged data. Since the interleaving apparatus does not include a memory, it can prevent delay in signal processing, thereby improving transmission performance. | 06-16-2011 |
20110143757 | APPARATUS AND METHOD FOR PROVIDING GROUP SERVICE IN WIRELESS COMMUNICATION SYSTEM - A group service providing method and apparatus suitable for use in a wireless communication system. A group registration method for providing a group service to a master terminal and a slave terminal, the group registration method may comprise receiving and storing subscriber profile information of the master terminal from an associated communication network server in response to a group service registration request from the master terminal; generating a group related to the group service registration request and a group key corresponding to the generated group and transmitting to the master terminal a group generation completion message including the group key; receiving and storing subscriber profile information of the slave terminal dependent on the master terminal from the communication network server; and transmitting the group key to the slave terminal with reference to the subscriber profile information of the slave terminal. | 06-16-2011 |
20110145311 | METHOD AND APPARATUS FOR MODULO N OPERATION - A method and apparatus for a modulo N operation are provided. The method for a modulo N operation on a positive integer X includes converting the positive integer X into a binary number, determining whether a modulo N is expressed by a product of 2 to the m | 06-16-2011 |
20120122453 | CELL SEARCHER OF MOBILE TERMINAL AND NEIGHBOR CELL SEARCHING METHOD THEREOF - Provided are a cell searcher for handover of a mobile terminal and a neighbor cell searching method thereof. The neighbor cell searching method includes: after searching a home cell, determining whether a Primary Synchronization Signal (PSS) code of the home cell is identical to that of a neighbor cell; when the PPS code of the home cell is identical to that of the neighbor cell, cancelling a PSS symbol of the home cell from a received signal in a time domain; and searching a neighbor cell from the received signal cancelled the PSS symbol of the home cell. | 05-17-2012 |
20130163557 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS - When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block. | 06-27-2013 |
20140269455 | METHOD FOR WIRELESS COMMUNICATION BASED ON RELAY AND APPARATUS FOR THE SAME - Methods for wireless communications based on relay and apparatuses for the same are disclosed. The method for a terminal to transmit signals comprises receiving scheduling information from a base station connected to the terminal; generating uplink data based on the scheduling information; performing punctuation on a data symbol positioned in a region through a downlink synchronization signal is transmitted in the generated uplink data; and transmitting the punctured uplink data. Therefore, the terminal may acquire synchronization signal easily, and perform neighbor cell search correctly based on the acquired synchronization signal. | 09-18-2014 |
Patent application number | Description | Published |
20130077584 | METHOD FOR GENERATING RANDOM ACCESS SIGNAL OF MACHINE TYPE COMMUNICATION DEVICE USING NARROW BANDWIDTH - Disclosed are a method for generating a random access signal of a machine type communication (MTC) device using a narrow bandwidth, and an MTC device. The method generates a random access signal by allocating a position in a frequency domain of a random access signal dedicated to the MTC device, that is, a position of a frequency for transmission of a random access preamble, to a center position of a base station system bandwidth, or by shifting a center frequency of the MTC device to a position of a random access frequency allocated for a legacy LTE terminal by a base station. | 03-28-2013 |
20130100899 | MACHINE TYPE COMMUNICATION DEVICE, APPARATUS AND METHOD FOR ALLOCATING RESOURCES TO THE SAME, AND DATA TRANSMISSION/RECEPTION METHOD OF THE SAME - Provided are a machine type communication (MTC) device, an apparatus and method for allocating resources to the MTC device, and a data transmission/reception method of the MTC device. The method of allocating resources to at least one user equipment (UE) and the MTC device includes determining whether there are resources allocated for an MTC device in a resource section, and when there are resources allocated for an MTC device, determining the class of the MTC device, determining the bandwidth of a resource region for the MTC device, and configuring a downlink frame according to the bandwidth of the resource region for the MTC device. | 04-25-2013 |
20130100900 | DATA TRANSCEIVING METHOD AND MACHINE TYPE COMMUNICATION DEVICE USING THE SAME - Disclosed are a data transmission and reception method and a machine type communication (MTC) device using the same. The data transmission and reception method according to the present invention may include: extracting MTC bandwidth information through a downlink channel or signaling; receiving the downlink channel or signaling including MTC downlink control format information; detecting resource region information occupied by the MTC downlink control channel; and receiving the MTC downlink control channel using the resource region information occupied by the MTC downlink control channel. | 04-25-2013 |
20130102244 | MACHINE TYPE COMMUNICATION GATEWAY USER EQUIPMENT AND MACHINE TYPE COMMUNICATION DATA RELAY METHOD OF THE SAME - Provided are machine type communication (MTC) gateway user equipment (MGUE) and an MTC data relay method of the same. The MGUE includes a first radio matching unit configured to process a signal having a first frequency band characteristic and provide radio access matching with a base station, a second radio matching unit configured to process a signal having a second frequency band characteristic and provide radio access matching with at least one MTC device, a radio access switching processor configured to convert data respectively output by the first radio matching unit and the second radio matching unit and provide the converted data, and a controller configured to find an identifier of at least one MTC device related to MTC control information received from the first radio matching unit and control the second radio matching unit to transmit the MTC control information to the MTC device. | 04-25-2013 |
20130121317 | MACHINE TYPE COMMUNICATION SUPPORT METHOD AND APPARATUS - Provided are a machine type communication (MTC) support method and apparatus capable of providing efficient MTC service. First, when a base station transmits a subframe to which an MTC-physical control format indicator channel (PCFICH) is allocated using an MTC-PCFICH code that is cyclic-shifted on the basis of a control format indicator (CFI) to MTC user equipment (UE), the MTC UE detects the MTC-PCFICH from the received subframe by performing blind decoding of a cyclic shift, and detects a region occupied by a legacy physical downlink control channel (PDCCH) on the basis of the detected MTC-PCFICH. Accordingly, it is possible to support efficient MTC service in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE)-based mobile communication system while maintaining compatibility with a legacy LTE station. | 05-16-2013 |
20130135984 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK DATA - Disclosed herein relates to a method of transmitting uplink data to increase multiplex capacity. The method includes allocating, by each of a plurality of machine type communication user equipment (MTC UE), position information within a single resource block (RB), which is used when transmitting uplink data, to the single RB, generating information about a demodulation reference signal (DMRS) used when demodulating the data received from the plurality of MTC UE, and transmitting the position information within the RB and the information about the DMRS to each of the plurality of MTC UE. | 05-30-2013 |
20130163556 | METHOD AND APPARATUS OF RESOURCE ALLOCATION FOR MACHINE TYPE COMMUNICATION DEVICE, METHOD AND APPARATUS FOR RECEIVING DATA FOR MACHINE TYPE COMMUNICATION - Disclosed herein relates to a resource allocation method for a machine type communication (MTC) device. The resource allocation method for the MTC device includes allocating a control channel with respect to a user terminal to a first time domain of a sub frame, and mixing at least one of a control channel with respect to the at least one MTC device, a data channel with respect to the user terminal, and a data channel with respect to the MTC device in a second time domain of the sub frame, and allocating the mixed channel to the second time domain of the sub frame. Accordingly, in a wireless communication system, control information and data may be transmitted and received to and from the MTC device while maintaining compatibility with the user terminal. | 06-27-2013 |
20130182680 | METHOD FOR MACHINE TYPE COMMUNICATION USER EQUIPMENT TO CONNECT TO EVOLVED NODE-B AND APPARATUS EMPLOYING THE SAME - Provided are a method for machine type communication (MTC) user equipment (UE) to connect to an evolved Node-B (eNB) in a random access procedure, and an apparatus employing the method. The method for MTC UE to connect to an eNB includes receiving, at the MTC UE, system information or a handover command from the eNB, transmitting, at the MTC UE, a random access preamble to the eNB, receiving, at the MTC UE, a random access response message from the eNB, and transmitting, at the MTC UE, a connection request message or a handover confirm message including information about a dedicated bandwidth of the MTC UE to the eNB such that the MTC UE can be allocated the dedicated bandwidth. Using this method, an eNB is notified of a dedicated bandwidth of MTC UE, and thus can effectively utilize radio resources. | 07-18-2013 |
20140010335 | METHOD OF RECEIVING DOWNLINK DATA, AND MACHINE TYPE COMMUNICATION DEVICE USING THE METHOD - Provided are a method of receiving downlink data and a machine type communication (MTC) device using the same. The MTC device according to the present invention which has a plurality of antennas includes a reception signal processing module that receives a downlink reference signal for each antenna from a base station, estimates reception signal quality with respect to the downlink reference signal for each antenna, and selects the antenna to receive a downlink signal in accordance with the reception signal quality with respect to each antenna. | 01-09-2014 |
Patent application number | Description | Published |
20090161652 | APPARATUS FOR GENERATING DOWN LINK SIGNAL, AND METHOD AND APPARATUS FOR CELL SEARCH IN CELLULAR SYSTEM - The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks. | 06-25-2009 |
20090232125 | CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE - In a cellular system in which OFDM is used, a forward link synchronization channel, a common pilot channel structure, an initial cell searching method of a mobile station, and an adjacent cell searching method for handover are required. | 09-17-2009 |
20090279513 | METHOD FOR TRANSMITTING SIGNAL AND METHOD FOR RECEIVING SIGNAL - A sector transmitter maps a synchronization channel and a broadcast channel to be on a time axis adjacent to each other, and applies the same bandwidth and the same transmission diversity to the synchronization channel and the broadcast channel. A mobile station estimates a plurality of channel statuses for a plurality of sectors from a synchronization channel signal, and acquires broadcast channel information from a broadcast channel signal using the plurality of estimated channel statuses. As a result, the mobile station can receive a broadcast channel with high reception quality while having low complexity. | 11-12-2009 |
20100074448 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL - A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code. | 03-25-2010 |
20100086129 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL - A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code. | 04-08-2010 |
20110044256 | METHOD FOR GENERATING DOWNLINK SIGNAL, AND METHOD FOR SEARCHING CELL - An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group. | 02-24-2011 |
20110149947 | CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE - A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group. | 06-23-2011 |
20130010770 | CELL SEARCH METHOD, FORWARD LINK FRAME TRANSMISSION METHOD, APPARATUS USING THE SAME AND FORWARD LINK FRAME STRUCTURE - A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group. | 01-10-2013 |
Patent application number | Description | Published |
20090252332 | METHOD FOR GENERATING DOWNLINK FRAME, AND METHOD FOR SEARCHING CELL - The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a first short sequence and a third scrambling sequence determined by a second short sequence; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; scrambling the second short sequence with the first scrambling sequence; scrambling the first short sequence with at least the third scrambling sequence; and mapping one second synchronization signal including the first short sequence scrambled with the first scrambling sequence and the second short sequence scrambled with at least the second scrambling sequence and another second synchronization signal including the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled with at least the third scrambling sequence in the frequency domain. | 10-08-2009 |
20100182976 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS - When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block. | 07-22-2010 |
20110085495 | METHOD AND APPARATUS FOR FORMING SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - Provided is method of forming a signal in a wireless communication system in which a plurality of terminals commonly use a resource in the time domain and the frequency domain. The method includes multiplying a signal to be transmitted by a frequency domain orthogonal code symbol corresponding to a first cyclic shift index in a first slot to be transmitted to a base station, wherein the multiplying is performed by a first terminal and a second terminal; and multiplying information to be transmitted by a frequency domain orthogonal code symbol corresponding to a second cyclic index that is different from the first cyclic index of the first slot to be transmitted to the base station, in a second slot, wherein the multiplying is performed by the first terminal and the second terminal. | 04-14-2011 |
20120307789 | METHOD AND APPARATUS FOR FORMING SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - Provided is method of forming a signal in a wireless communication system in which a plurality of terminals commonly use a resource in the time domain and the frequency domain. The method includes multiplying a signal to be transmitted by a frequency domain orthogonal code symbol corresponding to a first cyclic shift index in a first slot to be transmitted to a base station, wherein the multiplying is performed by a first terminal and a second terminal; and multiplying information to be transmitted by a frequency domain orthogonal code symbol corresponding to a second cyclic index that is different from the first cyclic index of the first slot to be transmitted to the base station, in a second slot, wherein the multiplying is performed by the first terminal and the second terminal. | 12-06-2012 |
20130064231 | GENERATING DOWNLINK FRAME AND SEARCHING FOR CELL - The present invention relates to a method for generating a downlink frame including generating a first short sequence and a second short sequence indicating cell group information, generating a first scrambling sequence determined by the first synchronization signal, generating a second scrambling sequence determined by the first short sequence, scrambling the first short sequence with the first scrambling sequence, scrambling the second short sequence with at least the second scrambling sequence, and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain. | 03-14-2013 |
20130100902 | GENERATING DOWNLINK FRAME AND SEARCHING FOR CELL - A method is provided for searching for a cell in a mobile station. The method includes receiving a downlink frame including a primary synchronization signal and a secondary synchronization signal. The secondary synchronization signal contains cell identity group information and the primary synchronization signal contains cell identity information within a cell identity group. The method also includes searching for a cell using the cell identity group information in the secondary synchronization signal and the cell identity information in the primary synchronization sign. | 04-25-2013 |
20130286966 | METHOD OF ALLOCATING RADIO RESOURCES FOR CONTROL CHANNEL AND METHOD FOR RECEIVING THE CONTROL CHANNEL - A method and apparatus for allocating radio resources for a control channel, and a method of receiving the control channel are disclosed. According to an aspect, the method of allocating radio resources includes: recognizing one or more reference signals included in an enhanced control channel positioned in a resource region for downlink data; dynamically setting a resource element group including one or more resource elements that are to be allocated to the enhanced control channel, according to the one or more reference signals; and determining one or more resource elements available for the enhanced control channel among the resource elements included in the set resource element group, and allocating the one or more resource elements to the enhanced control channel. | 10-31-2013 |
20140004895 | DATA TRANSMITTING METHOD FOR MACHINE TYPE COMMUNICATION (MTC) SERVICE AND COMMUNICATION APPARATUS USING THE SAME | 01-02-2014 |
20140073337 | COMMUNICATION DEVICE AND COMMUNICATION METHOD USING MILLIMETER-WAVE FREQUENCY BAND - There are provided a communication device using a millimeter-wave frequency band and a communication method using the millimeter-wave frequency band. The communication device includes a beam scheduling unit configured to schedule uplink and downlink beams corresponding to movement of a terminal, a core network interface unit configured to transmit data provided from the beam scheduling unit to a core network, and to provide data received from the core network to the beam scheduling unit, a mobility management unit configured to configure an uplink and downlink beam set based on inter-beam interference information provided from the beam scheduling unit, and an inter-base station interface unit configured to exchange a control message with another base station under control of the mobility management unit. Therefore, it is possible to efficiently build a cellular network using the millimeter-wave frequency band. | 03-13-2014 |
20140162655 | ANTENNA APPARATUS AND METHOD FOR HANDOVER USING THE SAME - There are provided an antenna apparatus and a method of handover using the antenna apparatus. The antenna apparatus may comprise a plurality of antenna elements forming a plurality of beams in a predetermined service area. The plurality of antenna elements are arranged in a plurality of rows, and a number of antenna elements included in an uppermost row of the plurality of rows is smaller than a number of antenna elements included in a downmost row of the plurality of rows, and differences between center angles of beams formed by the antenna elements included in the downmost row are larger than differences between center angles of beams formed by the antenna elements included in the uppermost row. | 06-12-2014 |
20140293853 | METHOD FOR TRANSMITTING MACHINE TYPE COMMUNICATION DATA AND APPARATUS FOR THE SAME - A method for transmitting machine type communication (MTC) data and an apparatus therefor are disclosed. A method for transmitting data in a MTC device located in a mobile communication system may comprise estimating an absolute position of the MTC device, receiving an awake message, extracting downlink synchronization information and absolute positional information of a base station included in the awake message, estimating a transmission delay time between the MTC device and the base station, and transmitting signal to the base station based on the transmission delay time and the downlink synchronization information. Therefore, a problem of uplink interferences between terminals and a base station due to a MTC device, which can be generated in supporting MTC services for a conventional cellular communication system, may be resolved. | 10-02-2014 |
20140295842 | METHOD FOR HANDOVER OF MOBILE APPARATUS AND COMMUNICATION DEVICE FOR THE SAME - Provided are a method for handover of mobile apparatus, a communication device for the same, and a mobile apparatus using the same. A communication device of a mobile apparatus may comprise a first antenna unit, a second antenna unit, a first signal processing part receiving a handover command indicating to handover from a first beam which maintains connection with the mobile apparatus through the first antenna unit to a second beam, and storing information about the first beam, and a second signal processing part performing handover from a third beam which maintains connection with the mobile apparatus through the second antenna unit to the first beam by using the information about the first beam. Therefore, a procedure for handover to a new beam area may be simplified. | 10-02-2014 |
20140376465 | TRANSMITTING AND RECEIVING APPARATUSES FOR FREQUENCY DIVISION MULTIPLE ACCESS - A transmitting apparatus may comprise a symbol mapper; a first DFT and a second DFT performing DFT spreading on symbols mapped in the symbol mapper; and a subcarrier mapper mapping symbols which are DFT-spread in the first DFT and the second DFT to subcarriers, wherein the first DFT performs DFT spreading on all resource blocks to be transmitted when a total size of the resource blocks to be transmitted is a size which can be processed by the first DFT, or the first DFT performs DFT spreading on as many resource blocks among the resource blocks to be transmitted as the first DFT can process and the second DFT performs DFT spreading on the rest of the resource blocks to be transmitted when a total size of the resource blocks to be transmitted is not a size which can be processed by the first DFT. | 12-25-2014 |
20150016337 | METHOD FOR CONFIGURING RADIO FRAMES AND APPARATUS USING THE METHOD - Disclosed are a method for configuring a radio frame, an apparatus for the same, a method for a mobile terminal to acquire synchronization with a base station, and a mobile terminal for the same. A method for configuring a radio frame, according to an example embodiment of the present invention, comprises generating a first synchronization signal and arranging the first synchronization signal in a slot for synchronization signal, generating a second synchronization signal and arranging the second synchronization signal in a predetermined position from the first synchronization signal, and constructing a radio frame including the first synchronization signal and the second synchronization signal. A plurality of secondary synchronization signals include difference sequences derived from a same sequence, and constitute hopping code with a predetermined hamming distance. | 01-15-2015 |
20150230219 | GENERATING DOWNLINK FRAME AND SEARCHING FOR CELL - The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain. | 08-13-2015 |
20150288428 | PROTOCOL FOR COOPERATION COMMUNICATION BETWEEN ACCESS POINTS IN OVERLAPPED BASIC SERVICE SET (OBSS) ENVIRONMENT - Disclosed is a protocol for transmitting data through cooperation between access points in an overlapped basic service set (OBSS) environment. A cooperative beamforming communication method may include negotiating, by a first access point, a cooperative transmit beamforming with a second access point having an OBSS area with the first access point; transmitting, by the first access point, a clear-to-send (CTS) to the second access point; and performing, by the first access point, the cooperative transmit beamforming with the second access point during a cooperative transmit beamforming duration determined through the negotiation after a predetermined time interval is elapsed, when transmission of the CTS is completed. | 10-08-2015 |
20150289172 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN HETEROGENEOUS NETWORK - For a transmitting terminal which is connected to a small base station of a small cell to transmit data to a receiving terminal belonging to another small cell, information of the receiving terminal to a target small base station to which the receiving terminal is connected is received from a small base station; when handover to the target small base station may be made, the handover to the target small base station is made depending on a handover instruction from the small base station and then data are transmitted to the receiving terminal through the target small base station. | 10-08-2015 |
20150358961 | COMMUNICATION APPARATUS AND DATA FRAME TRANSMISSION METHOD OF THE SAME - Provided is a data frame transmission method of a communication apparatus, the method including determining whether a transmission allowance condition of a data frame of the communication apparatus is satisfied when another communication apparatus occupies a channel, verifying an end time of another data frame transmitted by the other communication apparatus based on a result of the determining, and transmitting the data frame based on the verified end time. | 12-10-2015 |
20160044623 | METHOD AND APPARATUS FOR CONTROLLING BASE STATION - Provided are a method and apparatus for controlling a plurality of base stations disposed along the moving path of a moving group object, including determining a frame offset for the plurality of base stations based on a first delay time generated between the moving group object and the plurality of base stations and a second delay time generated between the plurality of base stations and the base station control device, and transferring data to be transmitted to the moving group object to the plurality of base stations based on the frame offset. | 02-11-2016 |
20160044676 | OPERATION METHOD OF STATION IN WIRELESS LOCAL AREA NETWORK - Provided is an operation method of a station (STA) in a wireless local area network (WLAN). The operation method includes generating a legacy preamble, generating a high efficiency (HE) preamble including scheduling information for a plurality of receiving STAs, and generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including the legacy preamble, the HE preamble, and a payload. | 02-11-2016 |
20160066260 | GENERATING DOWNLINK FRAME AND SEARCHING FOR CELL - The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain. | 03-03-2016 |