Patent application number | Description | Published |
20110096658 | PRECODING METHOD FOR REDUCING UPLINK PAPR AND APPARATUS THEREOF - A radio communication system is provided. An uplink transmission method of a user equipment in a radio communication system includes performing Fourier transform on one or more data sequences to generate one or more first frequency-domain sequences, applying precoding for multi-antenna transmission to the one or more first frequency-domain sequences to generate one or more second frequency-domain sequences; performing inverse Fourier transform on the one or more second frequency-domain sequences to generate one or more transmission symbols, and transmitting the one or more transmission symbols via multiple antennas. | 04-28-2011 |
20110243088 | UPLINK ACK/NACK SIGNALING IN CARRIER AGGREGATION ENVIRONMENT - An uplink ACK/NACK signaling method and apparatus in carrier aggregation environment are disclosed. The method for performing a HARQ procedure by a user equipment in a wireless communication system includes receiving one or more control channels carrying downlink scheduling information from a base station (BS), wherein each control channel carries information indicating a total number of control channels transmitted from the BS to the UE, and determining whether the total number of control channels transmitted to the UE is identical to the number of control channels received at the UE. | 10-06-2011 |
20110249601 | METHOD OF TRANSMITTING CONTROL INFORMATION FOR PERFORMING HARQ PROCESS IN WIRELESS COMMUNICATION SYSTEM SUPPORTING PLURALITY OF TRANSMISSION BANDS - A method of transmitting control information for performing a Hybrid Automatic Repeat Request (HARQ) process in a wireless communication system supporting a plurality of transmission bands is disclosed. The method includes generating the control information including HARQ Process Set (HPS) information indicating a specific HPS of a plurality of HPSs corresponding to the plurality of transmission bands, and transmitting the generated control information to a user equipment. A predetermined number of independent HARQ processes is performed according to the plurality of transmission bands. | 10-13-2011 |
20110280169 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - The present invention relates to a radio communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a radio communication system, said method comprising the steps of determining the transmission power for both a first channel and a second channel independently from one another; reducing at least the transmission power of the first channel or the transmission power of the second channel in consideration of a channel priority when the sum of the transmission power of the first channel and the transmission power of the second channel exceeds a maximum transmission power, and transmitting signals at the same time to a base station through the first channel and the second channel. | 11-17-2011 |
20110281601 | METHOD OF MEASUREMENT OVER MULTIPLE DOWNLINK CARRIERS AND APPARATUS THEREFOR - A wireless communication system is disclosed. A method for transmitting channel information by a user equipment (UE) in a wireless communication system, includes receiving a radio frequency (RF) signal from a plurality of downlink component carriers, and reporting a channel measurement result of at least one downlink component carrier from among the plurality of downlink component carriers via an uplink, wherein measurement duration for the reporting is lager a downlink component carrier in a first state than on a downlink component carrier in a second state. | 11-17-2011 |
20110287804 | METHOD FOR CONTROLLING SIGNAL TRANSMISSION POWER AND DEVICE FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a wireless communication system, said method comprising the steps of: checking the maximum transmission power (P_CC_MAX) for each component carrier of a plurality of component carriers, as well as the maximum transmission power (P_UE_MAX) of the terminal; calculating the transmission power for each channel to be simultaneously transmitted to a base station through one or more component carriers; independently adjusting the transmission power for each of the channels so as not to exceed the maximum transmission power (P_CC_MAX) and the maximum transmission power (P_UE_MAX); and transmitting a signal to the base station through the plurality of channels for which the transmission power is adjusted. | 11-24-2011 |
20110292826 | METHOD AND APPARATUS OF CONTROLLING TRANSMISSION POWER - A method of transmitting signals from a transmitter of a wireless communication system comprises determining each transmission power of a first signal and a second signal; if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and simultaneously transmitting the first signal and the second signal to a receiver using the adjusted transmission power. | 12-01-2011 |
20110292900 | METHOD AND APPARATUS OF TRANSMITTING ACK/NACK - The present invention is directed to a wireless communication system is disclosed. More specifically, the present invention is directed to a method of transmitting an ACK/NACK (Acknowledgement/Negative-ACK) signal a user equipment in the wireless communication system, the method includes receiving a first downlink control channel from a base station; receiving scheduling information through a second downlink control channel from the base station; deciding an uplink resource index for transmitting an ACK/NACK signal associated with the scheduling by considering the first control channel when the first control channel has a predetermined format; and transmitting the ACK/NACK signal to the base station by using an uplink resource indicated by the uplink resource index. | 12-01-2011 |
20110292902 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK - The present invention is directed to a wireless communication system. Particularly, the present invention is directed to a method and an apparatus of transmitting ACK/NACK (acknowledgement/negative-ACK) signal at a user equipment in a wireless communication system, the method comprising: receiving a plurality of data blocks from a transmitting end; reserving a plurality of PUCCH (physical uplink control channel) resources for transmission of the ACK/NACK signal; mapping ACK/NACK hypothesis for the plurality of the data blocks to a PUCCH resource group including at least two reserved PUCCH resources; and transmitting at least two modulation symbols corresponding to the ACK/NACK hypothesis to the transmitting end via the PUCCH resource group. | 12-01-2011 |
20110306335 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method of transmitting a sounding reference signal from a user equipment to a base station in a wireless communication system using a plurality of component carriers is disclosed. The present invention includes the steps of checking offset values of a plurality of the component carriers corresponding to a subframe having the sounding reference signal applied thereto from the base station and if the sounding reference signal is transmitted using a certain component carrier of a plurality of the component carriers, transmitting the sounding reference signal to the base station using the certain component carrier in a sub-frame corresponding to the offset value of the certain component carrier. Preferably, the present invention further includes the step of if the sounding reference signals are transmitted using at least two component carriers in the same subframe, transmitting the sounding reference signal having a longest transmission periodicity among the sounding reference signals only. | 12-15-2011 |
20120040607 | METHOD FOR RELAYING DATA IN MULTI-HOP CELLULAR SYSTEM - Disclosed is a method for relaying data in a multi-hop cellular system, the method including receiving by a terminal from a base station a notification as to whether the terminal is decided as a candidate for a relay, deciding by the terminal whether to be a representative candidate terminal for the relay according to a channel state with the other terminals within a coverage of the base station if the terminal is decided as the candidate for the relay, sending by the terminal to the base station a notification if the terminal is decided as the representative candidate terminal, and relaying data received from the other terminals to calculate relay probability terminals to the base station if the terminal is notified from the base station as to that the terminal is finally decided as the relay. | 02-16-2012 |
20120057487 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK - The present invention is directed to a wireless communication system. Particularly, the present invention is directed to a method and an apparatus of transmitting an ACK/NACK (acknowledgement/negative ACK) signal by a user equipment in a wireless communication system, which includes receiving a plurality of data units from a base station, bundling ACK/NACK results for a plurality of the data units per time or frequency interval to obtain at least one bundled ACK/NACK result, performing ACK/NACK multiplexing over the at least one ACK/NACK result to determine an uplink resource for ACK/NACK transmission and a bit sequence, and transmitting the bit sequence to the base station via the uplink resource for the ACK/NACK transmission. | 03-08-2012 |
20120057559 | METHOD FOR TRANSMITTING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention discloses a method in which a base station transmits a downlink signal in a wireless communication system. In detail, the method comprises the following steps: allocating a transmitting resource to data symbols for transmitting downlink signals, in the direction of increasing a frequency index; and transmitting the downlink signal to a terminal, using the allocated resource. The frequency band of preset orthogonal frequency division multiplexing (OFDM) symbols, from among the transmitting resource, contains a control domain and a segment band. The step of allocating the transmitting resource comprises the step of puncturing the data symbol using a control channel, to which the control domain contained in the preset OFDM symbols is allocated. | 03-08-2012 |
20120076105 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted. | 03-29-2012 |
20120093197 | METHOD AND APPARATUS FOR TRANSMITTING ENCODED SIGNALS WITH FREQUENCY HOPPING ENVIRONMENT - This document is related to a wireless communication system, and more particularly to a method and an apparatus for transmitting encoded signals with frequency hopping environment. A method of transmitting signals by a user equipment (UE) comprises: encoding an input signal having a length of (A) bits by using (A) basis sequences having a length of 20 bits to output an encoded signal having a length of 20 bits, wherein (A) is a natural number less than 14; mapping the encoded signal having the length of 20 bits to two different resource regions, wherein the first 10 bits of the encoded signal are mapped to a first resource region, and the second 10 bits of the encoded signal are mapped to a second resource region; and transmitting the resource-mapped signals to a Node B, wherein the encoded signal or the (A) basis sequences are cyclic shifted with a value of (x) before mapping the encoded signal to the two different resource regions, wherein (x) is a natural number less than 20. | 04-19-2012 |
20120106460 | CARRIER RECONFIGURATION IN MULTI-CARRIER AGGREGATION - The present invention relates to a wireless communication system which supports carrier aggregation. In detail, the present invention relates to a method and apparatus, wherein a mobile station changes a component carrier (CC) in a wireless communication system that supports carrier aggregation. The method comprises the steps of: receiving, from a base station, a CC reconfiguration command via one or more first preconfigured CCs; reconfiguring, in accordance with the CC reconfiguration command, CC-related information to change one or more first preconfigured CCs to a second CC; and transmitting a signal indicating the completion of CC reconfiguration to the base station after the reconfiguration of the CC-related information. | 05-03-2012 |
20120106491 | TIME-SLOT BASED MULTIPLE ACK/NACK TRANSMISSION - A method of transmitting ACK/NACK (Acknowledgement/Negative-ACK) signal by a user equipment in a wireless communication system comprises receiving a plurality of data unit from a base station; reserving a plurality of physical uplink control channel (PUCCH) resources corresponding to the plurality of data units within a subframe having a plurality of slots; and transmitting one or more ACK/NACK signals for the plurality of data units to the base station by using at least part of the plurality of PUCCH resources reserved within the subframe, wherein the PUCCH resources through which the one or more ACK/NACK signals are transmitted are selected independently per slot. | 05-03-2012 |
20120106495 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A method, related to the present invention, comprises: a step of receiving, from a base station, first component information for transmitting first channel information for a first frequency band; a step of receiving, from the base station, second component information for transmitting second channel information for a second frequency band added to the first frequency band; a step of transmitting the first channel information to the base station in accordance with the first component information; and a step of transmitting the second channel information to the base station in accordance with the second component information. When the point of time of the transmission of the first channel information and the point of time of the transmission of the second channel information coincide with each other, either the first channel information or the second channel information is transmitted in accordance with a predetermined drop rule. | 05-03-2012 |
20120122513 | METHOD FOR COOPERATIVE CONTROL OF POWER AMONG BASE STATIONS AND BASE STATION DEVICE USING SAME - A method for cooperative control of power among base stations and a base station device which performs the same are discussed. A first receiving unit is configured such that a specific base station in a cooperative unit receives, from a specific terminal located on a cell edge of the specific base station, token value information which indicates an average transmission rate of the specific terminal and the up-to-date level of satisfaction of the minimum average transmission rate of the specific terminal. A second receiving unit receives, from one or more other base stations in the cooperative unit, information containing an average transmission rate of terminals located on edges of each of the base stations, token values of terminals located on cell edges of each of the base stations, and the current power levels of each of one or more base stations. | 05-17-2012 |