Patent application number | Description | Published |
20090175373 | SYMBOL MAPPING METHOD FOR REPETITION CHANNEL CODING - A symbol mapping method for repetition coding is disclosed. The symbol mapping method comprises performing repetition coding on codeword to output repeated codeword symbols, and mapping the repeated codeword symbols with subcarriers located in different localized resource blocks. According to the embodiments of the present invention, it is possible to obtain maximum reliability in a receiving side by mapping codeword bits with subcarriers to reduce the number of bits having low reliability when a transmitting side uses repetition coding. Also, it is possible to improve decoding throughput and obtain channel diversity. | 07-09-2009 |
20090249158 | METHOD FOR PACKET RETRANSMISSION EMPLOYING FEEDBACK INFORMATION - A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success/failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission. | 10-01-2009 |
20100002644 | METHOD OF RETRANSMITTING DATA IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR IMPLEMENTING THE SAME - A method of transmitting data in a wireless communication system is disclosed. More specifically, the method includes receiving a first group index and a second group index, wherein the first group index represents indices of a group having channel power below a specified threshold value and the second index group index represents indices of a group having channel power greater than or equal to the specified threshold value, and transmitting the data after swapping mapping locations of the first group index and the second group index. | 01-07-2010 |
20100061473 | METHOD AND APPARATUS FOR SELECTING MODULATION AND CODING SCHEME (MCS) INDEX BASED ON FREQUENCY SELECTIVITY - A method of selecting a modulation and coding scheme (MCS) index in a wireless communication system is disclosed. More specifically, the method includes measuring a frequency selectivity of a receiving channel, selecting a MCS index having a coding rate below a prescribed coding rate threshold value if the measured frequency selectivity is greater than or equal to a specified frequency selectivity threshold, and selecting the MCS index having the coding rate above or equal to the prescribed coding rate threshold value if the measured frequency selectivity is less than the specified frequency selectivity threshold. | 03-11-2010 |
20100067367 | METHOD OF SELECTING MODULATION AND CODING SCHEME (MCS) INDEX IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR IMPLEMENTING THE SAME - A method of selecting a modulation and coding scheme (MCS) in a wireless communication system is disclosed. More specifically, the method includes selecting a MCS index having a coding rate that is greater than a specified coding rate threshold if a resource allocation scheme of a transmitting end employs a localized resource allocation scheme, and selecting the MCS index having the coding rate that is less than the specified coding rate threshold if the resource allocation scheme of the transmitting end employs the distributed resource allocation scheme. | 03-18-2010 |
20100165952 | ORTHOGONAL FREQUENCY AND CODE HOPPING MULTIPLEXING COMMUNICATIONS METHOD - An Orthogonal Frequency and Code Hopping Multiplexing (OFCHM) communication method based Orthogonal Frequency Division Multiplexing (OFDM) in a wireless communication system in which a plurality of communication channels are synchronized through a single medium. Six types of spreading and hopping methods are included, a method of controlling spreading and hopping depending on channel states, and a method of determining whether radio resources, consisting of subcarriers and orthogonal codewords, are allocated in a hopping manner according to the quality of service in the OFCHM communication method based OFDM. Furthermore, an embodiment employing six multiple array antennas is included. For this purpose, a method of combining a collision comparator and controller for monitoring the operations of a subcarrier group hopping pattern generator and an orthogonal code hopping pattern generator, a multiplexer and data symbol mapper, and the collision of hopping patterns that are composed of subcarriers and orthogonal codewords, and comparing data symbols to be transmitted to second communication stations to determine whether the data symbols collide in a symbol interval, a beam-forming processor for managing the operation of multiple array antennas, and a weighting vector controller is proposed. | 07-01-2010 |
20100177717 | GROUPING BASED RESOURCE ALLOCATION METHOD, METHOD FOR TRANSMITTING SIGNAL USING THE SAME, AND GROUPING BASED RESOURCE ALLOCATION CONTROLLER - A grouping based resource allocation method, a method for transmitting a signal using the same, and a grouping based resource allocation controller are disclosed. That is, the method including grouping a plurality of user equipments (UEs) to a predetermined number of groups using feedback information received from the plurality of UEs and dynamically allocating communication resources to the UEs included in the groups according to the group based feedback information and the method for transmitting the signal using the same are disclosed. In addition, a grouping based resource allocation controller including a grouping module and control module for performing the above-described method in a base station is disclosed. | 07-15-2010 |
20100220645 | METHOD FOR COMMUNICATING WITH RELAY STATION - A method for communicating with a relay station is disclosed. The method for communicating with a relay station comprises transmitting resource allocation information of downlink traffic and uplink traffic from a base station to the relay; and transmitting the downlink traffic to the relay by encapsulating the downlink traffic in accordance with the resource allocation information and receiving encapsulated uplink traffic from the relay in accordance with the resource allocation information. It is possible to enable efficient communication through a relay using a minimum interface without deterioration of throughput even in the case that a base station does not know detailed attributes of a relay existing in a system. Also, it is possible to coordinate collision through a master relay in case of a system supporting multi-hop relays. | 09-02-2010 |
20100227636 | METHOD FOR RANDOM ACCESS BASED ON PRIORITY - A random access method based on priority is disclosed. A priority-based random access method for use in a random access method supporting emergency communication including selecting, by a user equipment (UE), a random access slot corresponding to priority of the UE, among several random access slots to which at least two priorities are allocated, selecting an arbitrary sequence by the UE, and transferring the selected sequence to a base station via the selected random access slot. The method minimizes a UE access delay time requesting emergency communication by assigning priority to resources, and is able to reduce an amount of wasted resources by effectively distributing resources to not only a high-priority UE but also a low-priority UE according to individual situations. | 09-09-2010 |
20100254288 | METHOD FOR TRANSCEIVING A SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a prescribed frame structure in a wireless communication system is disclosed. A mobile station can transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. Moreover, the mobile station can transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. | 10-07-2010 |
20100254289 | METHOD FOR TRANSCEIVING A SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a prescribed frame structure in a wireless communication system is disclosed. A mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. Moreover, the mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol, which is designed to mutually coexist without causing collision or interference with another frame structure with a different CP length. In this case, a channel bandwidth of the prescribed frame structure is 7 MHz. | 10-07-2010 |
20100254367 | METHOD FOR TRANSCEIVING A SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a prescribed frame structure in a wireless communication system is disclosed. A mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. Moreover, the mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol, which is designed to mutually coexist without causing collision or interference with another frame structure with a different CP length. In this case, a channel bandwidth of the prescribed frame structure is 8.75 MHz. | 10-07-2010 |
20100265897 | METHOD FOR RETRANSMITTING PACKETS ACCORDING TO DECODING FAILURES OR RELIABILITY - A method for retransmitting packets in accordance with decoding failure or reliability is disclosed. A method for retransmitting packets from a transmitting side in accordance with information of a receiving side comprises changing an order of packet symbols mapped with subcarriers, if retransmission information representing decoding success or reliability for a specific codeword is received from the receiving side! mapping the packet symbols with the subcarriers in accordance with the changed order; and transmitting a codeword generated in accordance with the mapped result to the receiving side. Thus, it is possible to improve packet decoding success probability of the receiving side during initial transmission or retransmission by controlling a type of transmission packets in accordance with feedback information of the receiving side. | 10-21-2010 |
20100272055 | METHOD OF MULTIPLEXING MULTIPLE ACCESS REGION - A method for multiplexing one or more multiple access regions is disclosed. The method for multiplexing one or more multiple access regions in a wireless access system comprises multiplexing the one or more multiple access regions so that a first base station and a second base station among a plurality of base stations which use one or more multiple access schemes together under a multi-cell environment use a single multiple access scheme in a predetermined resource region allocated to each of the first base station and the second base station; and transmitting multiplexing information obtained from the multiplexing the one or more multiple access regions to a mobile station included in a cell region of the plurality of base stations. As a user uses SC-FDMA scheme and OFDMA scheme together, it is possible to obtain a single carrier effect of the SC-FDMA system and flexibility of the OFDMA system on a time axis and a frequency axis. | 10-28-2010 |
20100278083 | METHOD FOR ESTABLISHING TIME DOMAIN STRUCTURE OF A FRAME IN A HETEROGENEOUS TDD SYSTEMS ENVIRONMENT - Disclosed in a method for establishing a time domain structure of a frame in a heterogeneous TDD systems environment. In other words, in a situation of coexisting heterogeneous systems comprising a first system corresponding to an existing TDD system and a second system corresponding to a new system, a method is provided for establishing a time domain structure of a second frame for the second TDD system mode to enable it to coexist with a first frame for the first TDD (Time Division Duplex) system mode, that comprises obtaining information for the first supported system type and a first ratio between the downlink region and the uplink region of the first frame structure, and then, according to the obtained information, establishing a second ratio between the downlink region and the uplink region of the second frame structure for the second system. Further, particular numerology is provided for said method. | 11-04-2010 |
20100284339 | METHOD OF TRANSMITTING CYCLIC PREFIX LENGTH INFORMATION - A method of transmitting cyclic prefix length information when wireless access systems having different cyclic prefix lengths coexist is disclosed. The method of transmitting cyclic prefix length information comprises including the cyclic prefix length information in a preamble; and transmitting the preamble to a receiving end, whereby a transmitter can notify the receiving end of a current cyclic prefix length. Also, in a specific interval where a super frame header is defined, a single cyclic prefix length is used in a legacy support mode and a legacy disable mode, and cyclic prefix length information of other data or control channel is included in the super frame header and then transmitted to the receiving end. If different CP lengths are used in a legacy support mode of an evolved system, it is possible to solve a problem in detecting a control channel or a data channel, which may occur as the CP lengths are not distinguished from each other after preamble detection. | 11-11-2010 |
20100284358 | Method for Transmitting Preamble for Legacy Support - A method for transmitting a preamble for legacy support is provided. In a communication system for supporting at least one of a first system corresponding to a legacy system and a second system which corresponds to an evolved system and supports two or more scalable bandwidths, a method for transmitting a preamble for the second system is provided. A preamble sequence is generated on the basis of a smallest bandwidth of the two or more scalable bandwidths, the generated preamble sequence is mapped to a resource zone to have a repetition factor which is relatively prime to a repetition factor of a repetition factor of a preamble for the first system, and the preamble sequence mapped to the resource zone is transmitted as the preamble for the second system. | 11-11-2010 |
20110007730 | METHOD OF GENERATING DATA AND TRANSMITTING SYNCHRONIZATION CHANNEL IN MOBILE COMMUNICATION SYSTEM - A method for a transmitting side to transmit a sync channel in a wireless communication system using a multicarrier is disclosed. The present invention includes the steps of generating one synchronization channel including a plurality of sub-synchronization channels and the generated multicarrier symbol to a receiving side via the synchronization channel. Accordingly, the present invention enables the transmitting side to efficiently use a radio resource, thereby raising data transmission efficiency of synchronization channel. | 01-13-2011 |
20110013543 | APPARATUS AND METHOD FOR PERFORMING COMMUNICATION USING FRAME STRUCTURE SUPPORTING H-FDD OPERATION - A method for performing communication using a frame structure that supports a half-frequency division duplex (H-FDD) operation and a device using the same are disclosed. A base station performs resource allocation scheduling to support H-FDD user equipment operation in a mobile communication system. For example, the base station allocates first, second and last uplink subframes for idle subframes within a specific frame or punctures them, so that the H-FDD user equipment does not use the uplink subframes. The base station transmits the scheduled resource allocation information to the user equipment through a superframe header, a preamble and a MAP. The user equipment which has received the scheduled resource allocation information (subframe index and location that can be used by the user equipment) transmits and receives a signal based on the resource allocation information. | 01-20-2011 |
20110019622 | RANGING STRUCTURE, MULTIPLEXING METHOD AND SIGNALING METHOD FOR LEGACY SUPPORT MODE - A method of performing communication in a wireless communication system is disclosed. In performing ranging, which is performed by a terminal in a wireless communication system supporting a normal scheme and a legacy scheme, the present invention includes selecting a specific ranging structure from a first ranging structure supporting the normal scheme and a second ranging structure supporting the legacy scheme, and transmitting a ranging signal using the specific ranging structure, wherein the first ranging structure and the second ranging structure are set to differ in at least one of a time resource, a frequency resource and a code resource. | 01-27-2011 |
20110098070 | METHOD FOR TRANSMITTING PHYSICAL LAYER ID INFORMATION - A method for transmitting IDs of cells of a specific type as physical cell ID information in addition to existing cell ID information is disclosed. For transmission of the physical cell ID information, the number of cell IDs used in transmitting the existing cell ID information on a synchronization channel is increased or a part of existing cell IDs are reserved for transmitting the additional specific-cell ID information. If the number of cell IDs is to be increased, the number of cell ID groups related to a secondary synchronization channel is increased in a manner that removes ambiguity and collision, a cell ID related to a primary synchronization channel is added, which satisfies conjugate symmetry, information is transmitted based on a transmission timing relationship between a primary synchronization code and a secondary synchronization code, or a scrambling scheme is modified. When a part of the existing cell IDs are reserved, conjugate symmetry is also considered in relation to a primary synchronization channel and ambiguity and collision are also considered in relation to a secondary synchronization channel. | 04-28-2011 |
20110126068 | SIGNAL TRANSMISSION METHOD USING MULTIPLE HARQ - A method is described for transmitting signals in a mobile communication system which splits an information block into a plurality of split-information blocks and performs a hybrid automatic repeat request (HARQ) process upon each of the split-information blocks. A method is also described for reducing control information overhead by transmitting control information only through one control channel when splitting an information block and transmitting split-information blocks through a plurality of subframes or a plurality of resource blocks. The segmentation of the information block is performed in a physical layer to reduce medium access control (MAC) overhead and to simplify implementation. | 05-26-2011 |
20110128916 | METHOD FOR SELF-CONFIGURING A CELLULAR INFRASTRUCTURE AS DESIRED, AND A DEVICE THEREFOR - The present invention relates to wireless communications system. More specifically, the present invention relates to a method in which a mobile station communicates with any desired node in a wireless communications system. This communications method comprises the steps of: transmitting upwards a first signal for searching for any desired node; receiving from the desired node a second signal indicating that a service can be provided to the mobile station, by way of response to the first signal; and carrying out a procedure for receiving the service from the desired node, wherein the desired node monitors the first signal in a sleep mode. | 06-02-2011 |
20110134747 | Method for Uplink Transmitting Control Information - A method for uplink transmitting control information from a user equipment in a wireless communication system comprises selecting a specific point among a plurality of points distributed into a symbol space, corresponding to control information, the symbol space including a modulation dimension and a sequence dimension; mapping a signal corresponding to the specific point with a control channel including single carrier-frequency division multiple access (SC-FDMA) symbols; and transmitting the control channel. Preferably, the specific point belongs to the sequence dimension. | 06-09-2011 |
20110195720 | METHOD FOR MANAGING IDENTIFICATION INFORMATION OF HETEROGENEOUS CELLS - Described is a method for managing the identification information of a relay station/femtocell/picocell. It is suggested that the identification information of the relay station/femtocell/picocell inherits either a first or second partial cell ID of the identification information allocated to a region that covers the relay station/femtocell/picocell if the identification information of the relay station/femtocell/picocell comprises the first and second partial cell IDs. At this time, the inherited ID may be a sector ID. The first and second partial cell IDs may or may not have a hierarchical structure. | 08-11-2011 |
20110199889 | SEQUENCE-GENERATING METHOD, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for enabling a transmitter to transmit a sequence in a wireless communication system, and to an apparatus for the same. A sequence-transmitting method comprises the steps of: performing at least one of a complex conjugate operation and a reverse operation on a first sequence to generate a second sequence; mapping the second sequence to a plurality of subcarriers in an Orthogonal Frequency Division Multiple Access (OFDMA) symbol; and transmitting the OFDMA symbol to a receiver. The invention also relates to an apparatus for the sequence-generating method. | 08-18-2011 |
20110211488 | TECHNIQUE FOR SIGNAL TRANSMISSION MODE DETERMINATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for determining the transmission mode in a wireless communication system. More specifically, the present invention relates to a method for transmission mode determination in a wireless communication system, comprising a step wherein feedback information regarding channel status is received, and a step wherein it is determined based on said feedback information whether a transmission signal will be transmitted via each of a fixed number of subcarriers, after applying a propagation sequence. | 09-01-2011 |
20110255451 | METHOD AND APPARATUS FOR DATA TRANSMISSION USING A DATA FRAME - A method and apparatus for transmitting data using a frame in a broadband wireless communication system are disclosed. The method for transmitting and receiving data in a broadband wireless communication system includes: setting a data frame for transmitting and receiving data through uplink and downlink; and transmitting and receiving data through the set data frame, wherein the data frame includes one or more first subframes and one or more second subframes including a different number of data symbols from that of data symbols of the first subframe. | 10-20-2011 |
20110268135 | METHOD OF CONSTRUCTING A FRAME BY MULTIPLEXING SUBFRAMES HAVING DIFFERENT CP LENGTH - The present invention relates to a broadband wireless access system, and more particularly, to a frame structure to which OFDM symbols having a cyclic prefix are transmitted. A method of constructing a frame in a broadband wireless access system according to one embodiment of the present invention comprises including one or more first subframes in the frame, the first subframes including a plurality of symbols having a cyclic prefix of a first length; and including one or more second subframes in the frame, the second subframes including a plurality of symbols having a cyclic prefix of a second length different from the first length, wherein the number of the first subframes and the number of the second subframes are determined considering an idle time for which effective symbols are not included in the frame. | 11-03-2011 |
20110280203 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for information transmission that is performed by a transmitter in a wireless communication system. The method comprises the steps of: acquiring a first resource index and a second resource index; generating information sequences based on the first resource index and the second resource index; and transmitting the information sequences via a first antenna and a second antenna, wherein the second resource index is acquired from the first resource index and the offset. | 11-17-2011 |
20110299440 | METHOD FOR TRANSMITTING AND RECEIVING RESOURCE ALLOCATION INFORMATION AND MOBILE STATION APPARATUS USING THE SAME - A method for receiving control information and a control information signaling receiving method are disclosed. If A-MAP information is allocated and transmitted, signaling overhead is greatly reduced, resulting in improved system performance. In addition, the method increases the number of data transmission areas in inverse proportion to control signaling overhead. In accordance with the method for receiving control information signaling, a mobile station correctly recognizes a location to which A-MAP information is allocated and transmitted, resulting in increased control information decoding efficiency. | 12-08-2011 |
20110299495 | METHOD FOR TRANSMITTING AND RECEIVING RESOURCE ALLOCATION INFORMATION AND MOBILE STATION APPARATUS USING THE SAME - A method for allocating the resources of a remaining region other than a region carrying a SuperFrame Header (SFH) and signaling the resource allocation is disclosed. A Mobile Station (MS) receives resource allocation information about a remaining region other than a region carrying an SFH in a predetermined channel bandwidth by the SFH from a Base Station (BS) and decodes the received resource allocation information. The MS decodes control information efficiently by receiving repetition number information about a sub_secondary SFH (sub_S-SFH) or sub_secondary Broadcast CHannel (sub_S-BCH) from the BS by a Primary SFH (P-SFH) or Primary BCH (P-BCH). | 12-08-2011 |
20120015645 | METHOD FOR TRANSMITTING A SYNCHRONOUS CHANNEL AND AN ESSENTIAL CONTROL INFORMATION CHANNEL, AND FEMTO BASE STATION THEREOF - The present invention provides a method for transmitting a synchronous channel and an essential control information channel in a femto base station. The method comprises the steps of: acquiring by the femto base station segment information from a macro base station which overlays the femto base station; discriminating by the femto base station the segment or subcarrier used by the macro base station; and transmitting by the femto base station a synchronous channel and essential control information thereof on the segment or subcarrier different from the segment or subcarrier discriminated in the previous step. | 01-19-2012 |
20120026934 | METHOD FOR ENABLING RELAY NODE TO TRANSMIT UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND THE RELAY NODE - Disclosed is a method for enabling a relay node to transmit uplink control information. The relay node can receive resource allocation information and sequence information according to the transmission format of a physical uplink control channel set from a base station in advance. Additionally, the relay node can transmit the uplink control information, to which a sequence corresponding to the received sequence information is applied, in at least one slot of a resource area, which is indicated by the received resource allocation information, through a fixed number of symbols. | 02-02-2012 |
20120026935 | METHOD FOR DETECTING HARQ/NACK FEEDBACK SIGNAL FROM REPEATER - Disclosed is a repeater apparatus for detecting a downlink HARQ ACK/NACK feedback signal from a base station. An RF (Radio Frequency) unit receives specific channel configuration information which includes offset information indicating the starting point of a specific channel to which said HARQ ACK/NACK feedback signal is transmitted from the base station and the position of the specific channel allocated for an exclusive use of said repeater apparatus within said specific channel from said start point, and receives the HARQ ACK/NACK feedback signal from said base station for an uplink transmission of said repeater. The processor detects said specific channel allocated for exclusive use of the repeater apparatus based on said received specific channel configuration information thereby decoding said received HARQ ACK/NACK feedback signal. | 02-02-2012 |
20120027123 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting and receiving data in a wireless communication system. The method for transmitting data in a wireless communication system, according to one aspect of the present invention, comprises a step in which a base station transmits downlink data to a first terminal which supports a first system via a first region of a frame, and transmits downlink data to a second terminal which supports a second system via a second region which follows the first region corresponding to a frame offset on a time axis, wherein said frame offset is an offset of the start point of the frame for said first system and the start point of the frame for said second system, and said first region includes 3+6 (said frame offset-1) OFDM symbols. | 02-02-2012 |
20120039239 | SIGNAL TRANSMITTING/RECEIVING METHOD FOR A RELAY NODE AND RELAY NODE USING THE METHOD - Disclosed is a method in which a relay node transmits/receives signals via a specific downlink subframe and a specific uplink subframe. The relay node may consider the propagation delay in accordance with the distance between a base station and the relay node to set a subframe timing for transmitting/receiving signals to/from the base station. The relay node may further consider the delay time of 0.5 symbol, 1 symbol or the like in addition to said propagation delay in the event of setting a downlink receiving timing. Setting an uplink subframe timing of the relay node can be divided into the event the timing is set on the basis of a backhaul link and the event the timing is set on the basis of an access link. In the event thee timing is set on the basis of the access link, the propagation delay can bee double that of the vent the timing is set on the basis of the backhaul link, which should be considered in setting the timing. | 02-16-2012 |
20120044833 | METHOD FOR TRANSMITTING RANGING INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND TERMINAL THEREOF - Disclosed is a method for configuring a ranging channel in various frame structures and using the same in a communication system. A ranging channel is effectively configured according to a data structure, namely, frame structure, transmitted and received between a mobile station (MS) and a base station (BS) in a wireless communication system, and ranging information is transmitted therethrough to thereby improve performance of a communication channel and resource efficiency. In the wireless communication system, a ranging channel is configured by using a time interval, such as an idle time, an idle symbol, an RTG, a TTG, and the like, not actually used for transmission of data or a signal in a data structure, namely, in a frame structure, transmitted and received between an MS and a BS, to transmit ranging information, so the channel performance and resource efficiency can be improved. | 02-23-2012 |
20120063374 | METHOD FOR CONDUCTING COMMUNICATION USING A FRAME STRUCTURE WHICH SUPPORTS TWO OR MORE WIRELESS COMMUNICATION SCHEMES - Disclosed is a method for conducting communication using a frame structure which supports two or more wireless communication schemes, and an apparatus using the method. A method for constructing an FDD frame according to the present invention efficiently supports a legacy system and an enhanced system using an H-FDD frame structure. Further, the method for constructing an FDD frame according to the present invention efficiently supports a terminal and an H-FDD terminal, which use different communication systems. | 03-15-2012 |
20120063403 | METHOD FOR TRANSMITTING A COMMON CONTROL CHANNEL, AND FEMTO BASE STATION FOR SAME - The present invention relates to a femto base station. More particularly, the present invention relates to a method for transmitting a common control channel and to a femto base station for the same. The present invention relates to a method for transmitting a common control channel, comprising a step in which the femto base station acquires segment information from a macro base station which overlays the femto base station; a step of identifying, using the segment information, a time segment used by the macro base station in transmitting the common control channel; and a step of transmitting a common control channel of the femto base station on a time segment other than the time-segment identified in the previous step. The present invention also relates to a femto base station for the method. | 03-15-2012 |
20120069790 | METHOD AND APPARATUS OF TRANSMITTING AND RECEIVING BACKHAUL DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus of transmitting and receiving backhaul downlink control information in a wireless communication system. In the method for transmitting backhaul downlink control information from a base station in a wireless communication system according to one aspect of the present invention, the base station transmits resource allocation information to at least one terminal and at least one relay node via a relay-physical downlink control channel (hereinafter referred to as “R-PDCCH”); transmits backhaul system information to the at least one relay node and the at least one terminal via a relay physical downlink shared channel (hereinafter referred to as “R-PDSCH”) which is determined according to the resource allocation information; and changes a backhaul downlink resource block according to the backhaul system information. | 03-22-2012 |
20120069793 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION FROM RELAY NODE ON BACKHAUL UPLINK - According to one embodiment of the present invention, the method for transmitting control information from a relay node to a base station on a backhaul link comprises the steps of: determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a first type slot having transmitted symbol with guard time set or a second type slot without guard time set; diffusing the control information in a time domain using a first length sequence for the first type slot or a second length sequence for the second type slot; mapping the diffused control information on at least one slot from the first type slot or the second type slot; and transmitting the backhaul uplink subframe having more than one slot from the first type slot or the second type slot wherein the control information is mapped. | 03-22-2012 |
20120069795 | METHOD IN WHICH A RELAY ALLOCATES CARRIERS ON A BACKHAUL LINK AND AN ACCESS LINK IN A MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, discloses a method and apparatus in which a relay allocates carriers on a backhaul link and an access link in a multi-carrier wireless communication system. The method in which the relay allocates resources in a multi-carrier wireless communication system in accordance with one embodiment of the present invention, comprises: determining a subframe pattern allocated on a first uplink component carrier to enable a backhaul uplink transmission from the relay to a base station; determining a subframe requiring reception of an access uplink from user equipment to the relay on the first uplink component carrier in accordance with a synchronous HARQ operation; and transmitting resource allocation control information containing carrier switching indicating information to the user equipment in the event the subframe requiring reception of an access uplink is determined to be the same as the subframe allocated for backhaul uplink transmission on the first uplink component carrier. | 03-22-2012 |
20120069812 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN RADIO COMMUNICATION SYSTEM - Disclosed is a method for transmitting a sounding reference signal from a terminal to a base station in a radio communication system. More specifically, the method comprises the steps of: receiving downlink control information from a base station; checking a flag bit included in said downlink control information; checking an interpretation bit is included in said downlink control information, when said flag bit indicates an uplink; and transmitting an additional sounding reference signal and/or an uplink common channel based on said interpretation bit. | 03-22-2012 |
20120071182 | INTER-CELL INTERFERENCE MITIGATING METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a serving base station in a wireless communication system to mitigate inter-cell interference. More specifically, the method comprises the steps of: allocating a first resource for a terminal existing in a first region in which the coverage of the serving base station and the coverage of a neighboring base station are overlapped with each other; and allocating a second resource with the first resource for a terminal existing in a second region of the coverage of the serving base station, which is outside of the coverage of the neighboring base station. Desirably, the first resource is for the serving base station only with reuse factor of ½, and the second resource is shared with the neighboring base station with reuse factor of 1. | 03-22-2012 |
20120076039 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL USING SPATIAL SILENCING - The present invention relates to a method for transmitting signals in a heterogeneous network, the method comprising: a step wherein a base station determines a value-added vector for forming a beam pattern to be applied to a subsidiary carrier; a step wherein carrier operation information including information related to the determined value-added vector is transmitted via a primary carrier; and a step wherein the subsidiary carrier is transmitted by applying the determined value-added vector. | 03-29-2012 |
20120082124 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL - The present invention relates to a method for transmitting a sounding reference signal from a terminal in a wireless communication system, the method comprising: receiving resource operation information, which includes resource allocation information for channel sounding, from a base station; and transmitting the sounding reference signal through the entire or part of a resource region that is allocated for transmission of a demodulation reference signal on a physical uplink shared channel (PUSCH) according to the resource operation information. | 04-05-2012 |
20120088515 | METHOD FOR TRANSMITTING A SIGNAL FOR A LOCATION-BASED SERVICE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. Particularly, in configuring a location estimation subframe for determining the location of a terminal in a wireless communication system, the present invention involves replacing a portion of repeating patterns of a channel estimation pilot in the location estimation subframe with a location estimation pilot. In this way, the present invention is capable of transmitting a location estimation reference signal for a location-based service to the terminal while minimizing influences on an existing wireless frame structure. | 04-12-2012 |
20120093021 | CELL SEARCHING METHOD AND APPARATUS IN MULTI-CARRIER SYSTEM - Provided are a cell searching method and an apparatus in a multi-carrier system. A terminal acquires a first physical cell identity (PCI) for a first downlink component carrier, and acquires an expanded PCI for a second downlink component carrier. A first downlink reference signal through the first downlink element carrier is transmitted on the basis of the PCI, and a second downlink reference signal through the second downlink component carrier is transmitted on the basis of the expanded PCI. | 04-19-2012 |
20120093173 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response. | 04-19-2012 |
20120099518 | APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION FOR REPEATER AND METHOD THEREOF - Disclosed are an apparatus for transmitting and receiving control information for a relay node and a method thereof. The relay node for receiving control information in a wireless communication system comprises: a receiving module for receiving through higher layer signaling from a base station the information on a resource block (RB) which the relay node should search to receive the control information; a processor for detecting the control information from the first RB by blind-decoding at least one received RB which should be searched; and a receiving module for receiving through the first RB from the base station the control information detected by the processor. | 04-26-2012 |
20120099520 | SIGNAL TRANSMITTING AND RECEIVING METHOD OF REPEATER AND REPEATER USING THE SAME - The present invention relates to a method for a repeater to transmit and receive a signal on a downlink sub frame in a wireless communication system, comprising the steps of: transmitting a first physical downlink control channel (PDCCH) to terminals positioned within a repeater cell on a downlink sub frame; and receiving a second PDCCH or a physical downlink shared channel (PDSCH) from a base station after a first guard time succeeding a first PDCCH section elapses, wherein a second guard time succeeding the PDSCH or the second PDCCH received from the base station is allocated to the downlink sub frame, and the repeater receives the second PDCCH through a certain range of symbols in accordance with information on the predetermined control channel section, which is received from the base station. | 04-26-2012 |
20120099565 | SYNCHRONIZATION ACQUISITION METHOD AND APPARATUS IN MULTI-CARRIER SYSTEM - Provided are a synchronization acquisition method and apparatus in a multi-carrier system. A terminal acquires the synchronization for a first downlink component carrier by detecting a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in the first downlink component carrier. The terminal acquires the synchronization for a second downlink component carrier by detecting a reference signal in the second downlink component carrier. | 04-26-2012 |
20120113884 | METHOD OF ALLOCATING RESOURCE FOR RELAY - A method for wireless backhaul communication between a base station and a relay is disclosed. The base station enables a physical control channel to be set up, separately from the terminal that is used to transmit control information to each relay and the physical downlink control channel that has been set up. The base station can transmit data to the relay based on this control information. In a special embodiment, physical downlink control channel transmissions can be minimized by prescribing in advance the transmission of control information between the base station and the relay. | 05-10-2012 |
20120113945 | METHOD AND APPARATUS FOR TRANSMITTING ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an acknowledgment through a base station in a multi-carrier system. The method for transmitting the acknowledgment through the base station in the multi-carrier system comprises the steps of receiving a plurality of uplink transmission blocks through at least one uplink carrier; determining a downlink channel for transmitting a plurality of ACK/NACK signals corresponding to the transmission blocks on the basis of the at least one uplink carrier; and transmitting the ACK/NACK signals on the determined downlink channel. | 05-10-2012 |
20120113948 | METHOD IN WHICH A RECEIVER TRANSMITS CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method in which a receiver transmits control information in a wireless communication system. The method comprises a step of receiving a plurality of data units from a transmitter, a step of determining acknowledgement/negative-acknowledgement (ACK/NACK) states for each of the data units; and a step of transmitting, to the transmitter, the ACK/NACK states in multiple ACK/NACK states or in a single ACK/NACK state in accordance with a predetermined condition. | 05-10-2012 |
20120120868 | APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND SYSTEM INFORMATION FOR REPEATERS AND METHOD THEREOF - A method of transmitting control information for a relay node (RN) from an eNode B in a wireless communication system includes transmitting information on a resource region of at least one relay-physical downlink control channel (R-PDCCH) including the control information for the RN and interleaving mode information on an interleaving mode applied to the at least one R-PDCCH to the RN, wherein the resource region of the at least one R-PDCCH is RN-specifically configured. | 05-17-2012 |
20120121028 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING A CONTROL FORMAT INDICATOR CHANNEL FOR A RELAY BACKHAUL LINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for transmitting/receiving a control format indicator channel for a relay backhaul link in a wireless communication system. According to one aspect of the present invention, a method for transmitting a control format indicator channel for a relay backhaul link in a wireless communication system is configured such that a base station generates a relay physical control format indicator channel (hereinafter, referred to as “R-PCFICH”) containing information on a relay physical downlink control channel (hereinafter, referred to as “R-PDCCH”) region, and transmits the R-PCFICH through a first OFDM symbol of the R-PDCCH region. | 05-17-2012 |
20120127898 | APPARATUS AND METHOD FOR PERFORMING COMMUNICATION USING H-FDD FRAME STRUCTURE IN MOBILE COMMUNICATION SYSTEM - Disclosed are an apparatus and a method for performing communication using a half-frequency division duplex (H-FDD) frame structure in a mobile communication system. A user equipment for performing communication using an H-FDD frame structure according to the present invention comprises an RF unit in which each user equipment group receives and transmits signals using the H-FDD frame structure wherein the order of the downlink zone and uplink zone are reversely allocated to each of the groups. The downlink zone and uplink zone, which are allocated to each of the user equipment groups in the H-FDD frame structure, include a sub-frame wherein one or more symbols are allocated to idle time slots or are punctured. Each of the user equipment groups can receive and transmit signals using symbols that are not allocated to the idle time slots or are not punctured in the sub-frame. | 05-24-2012 |
20130322381 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request transmitted and the sequence number information included in the received random access response. | 12-05-2013 |
20140286233 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION FROM RELAY NODE ON BACKHAUL UPLINK - According to one embodiment of the present invention, the method for transmitting control information from a relay node to a base station on a backhaul link comprises the steps of: determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a first type slot having transmitted symbol with guard time set or a second type slot without guard time set; diffusing the control information in a time domain using a first length sequence for the first type slot or a second length sequence for the second type slot; mapping the diffused control information on at least one slot from the first type slot or the second type slot; and transmitting the backhaul uplink subframe having more than one slot from the first type slot or the second type slot wherein the control information is mapped. | 09-25-2014 |
20140321356 | RELAY NODE DEVICE FOR RECEIVING CONTROL INFORMATION FROM A BASE STATION AND METHOD THEREFOR - The present invention relates to a relay node device for receiving control information from a base station and a method therefor. The relay node device according to the present invention comprises: a receiver, which receives information about an area where a relay-physical downlink control channel (R-PDCCH), the channel for transmitting control information for the relay node from a base station, is allocated; a processor, which searches for at least one R-PDCCH for the relay node based on the R-PDCCH allocation information received; and an R-PDCCH receiver, which receives the at least one R-PDCCH from the fourth symbol of the first slot in a downlink backhaul subframe of the area where the at least one R-PDCCH searched for by the processor has been allocated. | 10-30-2014 |