Patent application number | Description | Published |
20110110323 | METHOD OF TRANSMITTING OR RECEIVING UPLINK SIGNALS AND EQUIPMENT THEREFOR - A method of transmitting or receiving uplink signals in a wireless communication system and an apparatus therefor are provided. In one aspect of the method of transmitting the uplink signals, a base station determines whether each of user equipments uses an orthogonal frequency division multiple access (OFDMA) scheme or a single carrier-frequency division multiple access (SC-FDMA) scheme in uplink transmission. Further, the base station transmits scheduling information containing information regarding the determined multiple access scheme to the user equipments, and thus reports a multiplexing scheme to be used by each user equipment. In addition, each user equipment transmits the uplink data to the base station by multiplexing the uplink data by using the OFDMA scheme or the SC-FDMA scheme according to the scheduling information. | 05-12-2011 |
20110111784 | METHOD OF ALLOCATING UPLINK RESOURCES IN WIRELESS COMMUNICATION SYSTEM - A method of allocating uplink resources in a wireless communication system is provided. The method comprises generating a first message which has a preamble and adaptively further includes resource request information based on a communication state with a base station and transmitting the first message to the base station. | 05-12-2011 |
20110164572 | Method of Transmitting Control Signal in Multi-Cell Cooperative Wireless Communication System - A method and apparatus of transmitting a control signal in a multi-cell cooperative wireless communication system is provided. The method comprises transmitting to a first user equipment a first control signal for first downlink data by a serving base station and transmitting to the first user equipment a second control signal for second downlink data received from a neighboring base station by the serving base station, wherein the first downlink data is data for the first user equipment, and the second downlink data is data for a second user equipment in a neighbor cell and is restorable by the first user equipment. | 07-07-2011 |
20110170513 | SCHEDULING METHOD IN WIRELESS COMMUNICATION SYSTEM USING RELAY STATION - A scheduling method in a wireless communication system using a relay station is provided. The method includes receiving scheduling information from the relay station, and performing scheduling by using the scheduling information, wherein a scheduling metric is determined for each mobile station or each connection when the scheduling is performed. Accordingly, scheduling can be effectively performed since a base station can recognize a state of a relay station. | 07-14-2011 |
20110171992 | METHOD AND APPARATUS OF CONTROLLING UPLINK POWER FOR MULTI-CELL COOPERATIVE SYSTEM - A method and apparatus of controlling uplink transmit power is provided. An estimated path-loss value for each of downlink signals from a control base station and one or more neighboring base stations is calculated. A signal path-loss value by using the calculated plurality of estimated path-loss values is obtained. An open-loop power control parameter by using the signal path-loss value is obtained. Uplink power can be controlled by considering cooperative communication of a plurality of base stations in a multi-cell cooperative radio communication system. | 07-14-2011 |
20110176585 | METHOD FOR RELAYING OF RELAY HAVING MULTIPLE ANTENNA IN WIRELESS COMMUNICATION SYSTEM - A method for relaying performed by a relay station is provided. The method includes receiving a signal from a source station through at least one receive antenna, defining a connection structure between the at least one receive antenna and at least one transmit antenna, processing the signal by using a midcoding matrix, and transmitting the processed signal to a destination station through the at least one transmit antenna. Quality of signal transmission can be enhanced. | 07-21-2011 |
20110194495 | Method for Managing Radio Resources for Uplink and Downlink in Wireless Communication System - A method for managing radio resources for an uplink and a downlink in a wireless communication system is provided. The method for managing radio resources may be applied to a system based on a heterogeneous cell deployment scenario. The heterogeneous cell deployment scenario implies that a plurality of cells coexist in the wireless communication system, and transmit power, processing capacity, and/or cell coverage are different from one cell to another. In the method for managing radio resources, a mobile station included in the wireless communication system establishes an uplink and a downlink with the same base station. In addition, an asymmetric management scheme is used in which a radio resource management scheme used for the uplink is different from a radio resource management scheme used for the downlink. Accordingly, each mobile station can use a different optimal radio resource management scheme for the uplink and the downlink, each mobile station and link can be effectively controlled, and usage efficiency of radio resources can be improved. | 08-11-2011 |
20130208700 | Method for Quickly Searching for an Access Point - According to one embodiment of the present invention, a method for searching for an access point in a terminal supporting a multiple wireless access scheme is provided. The method may comprise the steps of; receiving, from a base station using a first wireless access scheme, information relating to an access point using a second wireless access scheme; determining whether one or more access points exist using the second wireless access scheme in the cell coverage of the base station on the basis of the information: searching for an access point accessible for a period that is shorter than a normal period when determining that the access point using the second wireless access scheme exists; and accessing the found access point using the second wireless access scheme. | 08-15-2013 |
Patent application number | Description | Published |
20110090890 | METHOD OF CHANNEL SCANNING IN WIRELESS LOCAL AREA NETWORK SYSTEM - A method and apparatus of scanning channels of a white space zone in a wireless local area network is provided. A response frame includes a white space map including information about whether each white space channel in the white space zone is occupied by an incumbent user. Channels of the white space zone are scanned based on the white space map. | 04-21-2011 |
20120120904 | Method and Apparatus of Scanning Channels in Wireless Local Area Network - A method and apparatus of scanning channels of a white space zone in a wireless local area network is provided. A beacon frame includes a white space map including information about whether each white space channel in the white space zone is occupied by an incumbent user. Channels of the white space zone are scanned based on the white space map. | 05-17-2012 |
20130303229 | Method and Apparatus of Transmit Power Control in Wireless Local Area Network - A method and apparatus of controlling a transmit power in a wireless local area network is provided. A wireless device operated in a TV White Space transmits a white space map indicating a list of available channels, and transmits an extended power constraint indicating a plurality of transmission channels and a plurality of maximum transmit powers, wherein the plurality of transmission channels are selected among the list of available channels and each of the plurality of maximum transmit powers corresponds to a maximum transmit power for each of the plurality of transmission channels. Interference can be mitigated between wireless devices operated in the TV White Space. | 11-14-2013 |
20130343341 | METHOD AND APPARATUS OF REQUESTING CHANNEL ACCESS IN WIRELESS LOCAL AREA NETWORK - A method and apparatus of requesting a channel access in a wireless local area network is provided. A transmitter transmits a plurality of Request To Send (RTS) frames over a plurality of requesting channels and receives at least one Clear To Send (CTS) frame over at least one responding channel as a response for the plurality of RTS frames. Each of the plurality of RTS frames indicates a bandwidth for the plurality of requesting channels, and the at least one CTS frame indicates a bandwidth for the at least one responding channel. | 12-26-2013 |
Patent application number | Description | Published |
20100103902 | METHOD OF TRANSMITTING SOUNDING REFERENCE SIGNAL - A method of transmitting a sounding reference signal (SRS) includes receiving SRS operation information including a sounding indicator, the sounding indicator indicating whether SRS transmission takes place at a subframe; generating the SRS according to the SRS operation information, and if the sounding indicator indicates occurrence of SRS transmission, transmitting the SRS at the subframe. Multiplexing can be achieved without collision between data and a sounding reference signal and single carrier characteristics required in uplink transmission can be preserved. | 04-29-2010 |
20100142475 | METHOD OF TRANSMITTINGG CONTROL INFORMATIOON WIRELESS - A method of transmitting control information includes generating a cyclically shifted sequence by cyclically shifting a base sequence by a cyclic shift amount, generating a modulated sequence based on a modulation symbol for control information and the cyclically shifted sequence, and transmitting the modulated sequence on a plurality of subcarriers, wherein available cyclic shifts of the base sequence are divided into a first part and a second part according to a type of the control information, and the first part and the second part are separated by at least one unallocated cyclic shift of the base sequence. | 06-10-2010 |
20110211510 | METHOD OF TRANSMITTING DATA IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a wireless communication system is provided. The method includes transmitting downlink scheduling information regarding downlink radio resource allocation and uplink scheduling information regarding uplink radio resource allocation on a downlink control channel, transmitting downlink data on a downlink data channel according to the downlink scheduling information, and detecting an acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the downlink data from a radio resource exclusively allocated to the ACK/NACK signal. According to the present invention, when an error occurs in a downlink control channel due to deterioration of a channel condition, the error can be promptly handled using an error detection protocol agreed between a user equipment and a base station. Therefore, data can be transmitted with higher reliability. | 09-01-2011 |
20110216713 | Method Of Transmitting Scheduling Request Signal - A method of transmitting a scheduling request signal, wherein the scheduling request signal is used to request a radio resource for uplink transmission in a wireless communication system is provided. The method includes configuring a physical uplink control channel (PUCCH) for transmission of a scheduling request signal in a subframe, the subframe comprising two consecutive slots, a slot comprising a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols, the scheduling request signal being carried by a presence or absence of transmission of the PUCCH, wherein at least one SC-FDMA symbol is assigned for transmission of a sounding reference signal, and transmitting the scheduling request signal and the sounding reference signal in the subframe. Scheduling request signal can be transmitted without interference with other control signals such as sounding reference signal that are transmitted on the same control channel with the scheduling request signal. | 09-08-2011 |
Patent application number | Description | Published |
20110038266 | METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of receiving control information in a wireless communication system includes receiving position information for searching at least one downlink control channel, a downlink control channel carrying control information of at least one user equipment, receiving multiplexed downlink control channel in which a plurality of downlink control channels are sequentially multiplexed and sequentially searching the downlink control channel on the multiplexed downlink control channel according to the position information. The number of detection attempts to detect its own control information can be reduced. | 02-17-2011 |
20110064042 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN MULTIPLE CARRIER SYSTEM - A method and apparatus for transmitting data in a multiple carrier system is provided. The method includes receiving an uplink resource assignment comprising a carrier indicator through one of a plurality of downlink carriers, and transmitting uplink data in a resource assigned by the uplink resource assignment through the uplink carrier indicated by the carrier indicator. | 03-17-2011 |
20110116572 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTIPLE ANTENNA SYSTEM - A method and an apparatus for transmitting a reference signal in a multiple antenna system are provided. The method includes transmitting a common reference signal through N antennas (N05-19-2011 | |
20110134849 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting data in a wireless communication system are provided. The method includes receiving cyclic shift information indicating a first cyclic shift value, obtaining a second cyclic shift value from the first cyclic shift value, transmitting a first signal based on the first cyclic shift value through a first antenna, and transmitting a second signal based on the second cyclic shift value through a second antenna, wherein the first signal and the second signal are transmitted on the same radio resource. | 06-09-2011 |
20110141941 | Method and Apparatus of Transmitting Control Information in Wireless Communication System - A method and an apparatus of transmitting control information in a wireless communication systema are provided. The method includes transmitting first control information and second control information through an uplink component carrier (UL CC), wherein the first control information is for a first downlink component carrier (DL CC), and the second control information is for a second DL CC. | 06-16-2011 |
20110143796 | METHOD AND APPARATUS OF MONITORING PDCCH IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of monitoring a physical downlink control channel (PDCCH) in a wireless communication system, carried in a user equipment (UE), are provided. The method includes receiving a PDCCH map, and monitoring a set of PDCCH candidates based on the PDCCH map. | 06-16-2011 |
20110194501 | COMMUNICATIONS METHOD AND DEVICE IN A MULTI-CARRIER SYSTEM - A communication method and apparatus using multiple carriers are provided. A primary carrier is configured, and multi-carrier control information for monitoring a control channel of a secondary carrier is transmitted through the primary carrier. A user equipment monitors a control channel of the secondary carrier on the basis of the multi-carrier control information. | 08-11-2011 |
20110194514 | METHOD AND APPARATUS OF RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of receiving data in a wireless communication system. The method includes receiving a downlink (DL) grant on a physical downlink control channel (PDCCH) through a first DL component carrier (CC), and receiving data based on the DL grant through a second DL CC. | 08-11-2011 |
20110194523 | METHOD AND DEVICE FOR WIRELESS SUBFRAME RESOURCE ALLOCATION - The method for wireless resource subframe allocation comprises the following steps: allocation of the control channel based on the first RAT (Radio Access Technology) of the first control domain, which includes the OFDM symbol of the first number from the sub-frame containing multiple OFDM symbols and multiple subcarriers in the frequency domain; allocation of the control channel based on the second RAT of the second control domain including the OFDM symbol of the second number which follows said first control domain; and the allocation of a data channel in the data domain which includes the OFDM symbols positioned outside said first control domain and second control domain. This invention provides a sub-frame structure which is compatible with existing wireless communication systems. This method allows the continued use of existing control channel systems or base signal structures. The method is also capable of supporting advanced features. | 08-11-2011 |
20110211489 | Communication Method and Apparatus in Multi-Carrier System - Disclosed is a communication method in a multi-carrier system, including: allocating radio resources for transmitting signals to a middle guard band; and transmitting the signals through the radio resources; wherein the middle guard band is a frequency band positioned between used bands of a plurality of carriers, respectively, within an aggregated carrier formed by aggregating the plurality of carriers and a unit allocating the radio resources of the middle guard band is different from a unit allocating the radio resources of the used bands. A multi-carrier system uses the guard bands between the carriers to improve channel estimation performance or increase efficiency of radio resources. | 09-01-2011 |
20110211522 | Method and Apparatus for Performing HARQ Process in Wireless Communication System - A method of performing hybrid automatic repeat request (HARQ) by a source station in a wireless communication system is provided. The method includes: transmitting data to a destination station at a transmission start time; receiving an acknowledgment (ACK) or negative-acknowledgement (NACK) signal for the data from the destination station after a first transmission time interval elapses from the transmission start time; and upon receiving the NACK signal, retransmitting the data after a second transmission time interval elapses from the transmission start time, wherein the second transmission time interval is one transmission time interval selected from a plurality of predetermined transmission time intervals. Accordingly, the wireless communication system can perform a heterogeneous HARQ process in which an HARQ period, an ACK/NACK transmission start time, and the like are different. | 09-01-2011 |
20110305134 | METHOD AND APPARATUS FOR PERFORMING A HARQ OPERATION IN A MULTI-CARRIER SYSTEM - A method of performing hybrid automatic repeat request (HARQ) of a user equipment (UE) in a multiple-carrier system is provided. The UE transmits uplink data on an uplink carrier. The UE receives acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier. Accordingly, HARQ can be supported in a multiple-carrier system. | 12-15-2011 |
20120033588 | METHOD FOR PERFORMING A HARQ OPERATION IN A RADIO COMMUNICATIONS SYSTEM, AND METHOD AND APPARATUS FOR ALLOCATION OF SUBFRAMES - There is provided a method for allocating subframes in a radio communications system that performs communication by using a radio frame including a plurality of subframes, the method including: selecting a backhaul downlink subframe in which a base station is to transmit a signal to a relay station; and allocating the backhaul downlink subframe to a substitution subframe which is not limitation subframes, when the selected backhaul downlink subframe corresponds to one of the limitation subframes, wherein the limitation subframes are subframes in which the relay station is to transmit essential information to a relay user equipment. Therefore, it is possible to overcome a limitation that is present in a link between the base station and the relay station, perform an HARQ operation, and improve the efficiency of radio resource allocation. | 02-09-2012 |