Abstract:
A communication method in a wireless communication system, and a wireless device therefore are discussed. The method according to one embodiment includes receiving a first control channel including first scheduling information on a first physical downlink shared channel (PDSCH) to be received in a first subframe; receiving a second control channel including second scheduling information on a second PDSCH to be received in a second subframe; determining whether the first subframe in which the first PDSCH is to be received is overlapped with the second subframe in which the second PDSCH is to be received; and if the first subframe is determined as being overlapped with the second subframe, determining a valid subframe for receiving at least one of the first PDSCH and the second PDSCH.
Abstract:
A method and a wireless station are described for receiving signals. The wireless station receives from a base station configured to use at least one of a plurality of time division duplex (TDD) uplink-downlink (UL-DL) subframe configurations, each of which indicates locations of at least one DL subframe and at least one UL subframe in a radio frame, a signal including information indicating that at least one uplink subframe indicated by the at least one of the plurality of TDD UL-DL subframe configurations is reconfigured as a DL subframe. The wireless station receives, from the base station, DL data on the UL subframe according to the signal.
Abstract:
A method for transmitting a control signal, performed by a wireless device. The method according to one embodiment includes allocating resource elements (REs) for a control channel; and transmitting the control signal through the Res. Each RE in the REs for the control channel is associated with one out of two antenna ports. The two antenna ports are included in a plurality of antenna ports used for transmitting demodulation reference signals (DM RS).
Abstract:
A method of relaying data performed by a relay station in a wireless communication system based on time division duplex (TDD) is provided. The relay station receives downlink data from a base station and relays the downlink data to at least one mobile station in an uplink subframe which belongs to an unlinked subframe. Accordingly, uplink acknowledgement (ACK) collision can be avoided, and efficiency of resource allocation can be increased.
Abstract:
A method of decoding a backhaul downlink signal of a relay node (RN), the method includes receiving a higher layer signal indicating a maximum transmission rank from a base station (BS), receiving control information through a relay control channel from the BS, and demodulating the control information, wherein the control information is mapped to resource elements which do not overlap with user equipment-specific reference signal resource elements (URS REs) in a control region which is used for the relay control channel transmission of the BS, the URS REs being reserved resource elements for user equipment-specific reference signals (URSs) according to the maximum transmission rank, and wherein the control information is demodulated based on user equipment-specific reference signals transmitted by the BS on one fixed antenna port n, where n is a natural number.
Abstract:
A method for receiving a downlink signal at a downlink reception entity in a wireless communication system, the method includes: receiving downlink control information by demodulating an advanced Physical Downlink Control Channel (PDCCH) of a first resource block (RB) pair of a RB bundle based on a downlink channel estimated by a first Demodulation Reference Signal (DMRS) in the first RB pair; and receiving downlink data by demodulating a Physical Downlink Shared Channel (PDSCH) of a second RB pair of the RB bundle based on a downlink channel estimated by a second DMRS in the second RB pair, wherein the same DMRS pattern is used for the first and the second DMRSs, and wherein antenna ports for the first and the second DMRSs are different.
Abstract:
A method for feeding back channel information, the method including if one or more cells are configured, performing a first feedback process and a second feeding process. The first feedback process is configured to transmit channel information including rank information The second feedback process is configured to transmit channel information including rank information which is the same as the rank information of the first feedback process.
Abstract:
A method performed by a user equipment (UE) in a wireless communication system, includes receiving a sounding reference signal (SRS) configuration via a radio resource control (RRC) signaling, the SRS configuration indicating a subframe configured for SRS transmission, wherein the SRS configuration includes an indicator indicating whether an aperiodic SRS transmission or a periodic SRS transmission is performed in the subframe configured for SRS transmission; based on the indicator indicating that the aperiodic SRS transmission is performed, receiving request information for requesting a transmission of an SRS and aperiodically transmitting the SRS in the configured subframe; and based on the indicator indicating that the periodic SRS transmission is performed, periodically transmitting the SRS in the configured subframe.
Abstract:
A method is provided for monitoring a control channel in a wireless communication system. A wireless device receives information from a base station for a search space in which a downlink control channel is monitored. The received information further includes first information indicating either a localized transmission or distributed transmission. The wireless device monitors the downlink control channel in the search space of a subframe, in at least one enhanced control channel element (ECCE) including a plurality of enhanced resource element groups (EREGs). If the first information indicates the localized transmission, the plurality of EREGs in each of the at least one ECCE are mapped to one of a plurality of physical resource block (PRB) pairs. If the localized transmission is used, the plurality of EREGs are associated with a single antenna port selected based on an index of the at least one ECCE and the wireless device's specific information.
Abstract:
A method is provided for receiving a downlink signal at a downlink reception entity in a wireless communication system. Downlink control information is received by demodulating a Physical Downlink Control Channel (PDCCH) in a first resource block (RB) pair within an RB bundle by using a first Demodulation Reference Signal (DMRS) in the first RB pair. Further, downlink data is received by demodulating a Physical Downlink Shared Channel (PDSCH) in one or more second RB pairs within the RB bundle by using a second DMRS in the one or more second RB pairs. The second DMRS is used based on an assumption that a same precoder is applied to the one or more second RB pairs.