Patent application number | Description | Published |
20110149942 | Method of Transmitting Data in Multiple Antenna System - A method of transmitting data in a multiple antenna system includes transmitting first data through a first pilot pattern zone in which pilots are arranged in a specific pilot pattern in a permutation zone having at least one tile comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols and a plurality of subcarriers, and transmitting second data through a second pilot pattern zone in which pilots are arranged in another pilot pattern different from the pilot pattern of the first pilot pattern zone in the permutation zone. Accordingly, a plurality of pilot patterns can be simultaneously used in one permutation zone, and thus waste of radio resources caused by the use of unnecessary pilots can be reduced by adaptively assigning pilots according to various channel environments and performances of user equipments. | 06-23-2011 |
20120106500 | METHOD AND APPARATUS FOR FEEDBACK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for feedback transmission in a wireless communication system are provided. A terminal selects at least one subband among plural subbands constituting a set of subbands and transmits information about feedback measured for the at least one subband. The feedback information contains an index of the at least one subband, and the at least one subband is selected in consideration of resource mapping of the plural subbands. | 05-03-2012 |
20120155374 | METHOD AND APPARATUS FOR SETTING A FRAME IN A WIRELESS COMMUNICATION SYSTEM COMPRISING A RELAY STATION - Provided are a method and apparatus for setting a frame of a relay station in a wireless communication system. A base station sets an access zone frame and a relay zone frame adjacent the access zone frame. The access zone frame comprises a downlink (DL) access zone in which the base station or the relay station transmits a signal to a terminal, and an uplink (UL) access zone in which the terminal transmits a signal to the base station or to the relay station. The relay zone frame comprises a DL relay zone in which the base station transmits a signal to the terminal or to the relay station, and a UL relay zone in which the terminal or the relay station transmits a signal to the base station. | 06-21-2012 |
20120250560 | METHOD AND APPARATUS FOR TRANSMITTING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM CONTAINING A RELAY STATION - Provided are a method and apparatus for transmitting feedback information in a wireless communication system containing a relay station. A subband is divided by a plurality of partitions, and the relay station measures feedback information for each of the partitions, and transmits feedback information measured for each of the partitions cyclically at a predetermined interval. Each partition can be a physical resource unit (PRU), and one PRU contains 18 subcarriers. Feedback information for each partition can be cyclically transmitted in the order fixed in the subband. | 10-04-2012 |
20120320857 | METHOD AND APPARATUS FOR FEEDBACK TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for feedback transmission in a wireless communication system. A terminal receives downlink control information from a base station and transmits to the base station event-driven feedback information over a first feedback channel. The downlink control information includes information about a short-term feedback period that corresponds to a short period of time for transmitting feedback information and information about a long-term feedback period that corresponds to a long period of time for transmitting feedback information, and the event-driven feedback information is transmitted on the basis of the long-term feedback period. | 12-20-2012 |
20120320860 | MULTICARRIER BASED COMMUNICATION METHOD AND DEVICE - Provided are a multicarrier based communication method and device. A mobile station activates a first carrier, and activates a second carrier adjacent to the first carrier. Defined within the first carrier there is a first frame comprising a legacy UL (uplink) region and an AAI (Advanced Air Interface) UL region; defined within the second carrier there is a second frame comprising an AAI UL region in the first frame occupy frequencies that differ from each other; and guard subcarriers between the AAI UL region of the first frame and the AAI UL region of the second frame are not used for data transmission. | 12-20-2012 |
20130070623 | METHOD AND APPARATUS FOR ALLOCATING A SOUNDING CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - There are provided a method and apparatus for allocating a sounding channel in a wireless communication system. A base station transmits a first sounding channel allocation data to allocate a first sounding channel for a first system to a first zone, and transmits a second sounding channel allocation data to allocate a second sounding channel for a second system other than the first system to a second zone. The first zone and the second zone are multiplexed by an FDM (Frequency Division Multiplexing) method, and the first sounding channel and the second sounding channel are allocated to a same OFDMA (Orthogonal Frequency Division Multiple Access) symbol. A channel response can be estimated accurately when a terminal for IEEE (Institute of Electrical and Electronics Engineers) 802.16m system and a terminal for IEEE 802.16e system coexist in a legacy support mode. | 03-21-2013 |
20160036575 | METHOD AND APPARATUS FOR COOPERATIVE TRANSMISSION IN MULTI-NODE SYSTEM - A method of performing cooperative transmission in a multi-node system including a Base Station (BS) and a plurality of nodes controlled by the BS is provided. The method comprises: transmitting a first signal generated using a first cell identifier (ID) from the plurality of nodes; and transmitting a second signal generated using a second cell ID from at least one of the plurality of nodes, wherein the first cell ID is identical with a cell ID used by the BS, and the second cell ID is different from the first cell ID. | 02-04-2016 |