Abstract: A base station used in a radio communication system includes a precoding matrix calculating unit that calculates a precoding matrix based on a first precoding matrix reported from a first user equipment in a pair selected as a target of multiplexing in a power region and a second precoding matrix reported from a second user equipment in the pair and a precoding unit that applies a precoding to transmission signals to the first user equipment and the second user equipment using the precoding matrix calculated by the precoding matrix calculating unit.

Abstract: There are provided a base station, a mobile station and a method for downlink scheduling by the base station. The base station comprises a scheduling unit, configured to assign a downlink resource block and a number of streams, an antenna port, and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and a transmitting unit, configured to transmit downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity.

Abstract: Disclosed are a downlink precoding method and a base station. The method includes: configuring a first precoding mode for a first cell, wherein the first precoding mode includes information of a precoding matrix configured for each candidate user of the first cell on each resource; selecting a scheduling user on each resource from candidate users according to the first precoding mode; and performing precoding to a channel estimation signal and downlink data of the scheduling user according to a precoding matrix of the scheduling user, and transmitting precoded channel estimation signal and precoded downlink data to the scheduling user. Such method and base station of the present disclosure can reduce the feedback overhead of the user, effectively improve the accuracy of channel quality indicator (CQI) estimation, and improve the system throughput and user throughput.

Abstract: The embodiments of the present invention provide an uplink resource scheduling method, a wireless base station and a mobile station. The method comprises: generating group dedicated signaling respectively for mobile station groups managed by the wireless base station, wherein group dedicated signaling of each mobile station group indicates uplink resources allocated to the mobile station group; multiplexing the generated group dedicated signaling into different positions of a first channel and transmitting the multiplexed group dedicated signaling; generating mobile station dedicated signaling for each mobile station in each of the mobile station groups, wherein the mobile station dedicated signaling at least includes group information indicating the mobile station group to which the mobile station belongs; and multiplexing the generated mobile station dedicated signaling into a second channel and transmitting the multiplexed mobile station dedicated signaling.

Abstract: The embodiments of the present invention provide a mobile communication method, a wireless base station and a mobile station. The mobile communication method according to the embodiment of the present invention is applied to the wireless base station. The method comprises: determining resource group offset information used for a mobile station; offsetting an initial physical channel resource group allocated to the mobile station according to the resource group offset information; determining cyclic shift information of demodulation reference signal used for the mobile station according to unused physical channel resources in the offset physical channel resource group; and transmitting the resource group offset information and the cyclic shift information to the mobile station.

Abstract: The present disclosure provides a method for controlling a power, comprising: determining an average basic transmission power of all User Equipments (UEs) in a cell in each first resource; for each first resource, determining a UE group scheduled in the first resource and a first transmission power allocation factor corresponding to the UE group according to the average basic transmission power. The present disclosure also provides an apparatus for controlling a power. According to the present disclosure, a base station determines a UE group scheduled in each subband and a transmission power for each UE in the UE group.

Abstract: The present disclosure provides a method for re-transmitting data, wherein the method at a User Equipment (UE) side comprises: receiving, by a UE, a re-transmitted data packet from a base station, determining whether to perform data combination according to a Signal to Interference-Noise Ratio (SINR) of a first-transmitted data packet and a SINR of the re-transmitted data packet; when it is determined to perform data combination, performing, by the UE, data combination for the re-transmitted data packet according to information buffered by the UE and detecting the re-transmitted data packet according to a result of performed data combination; or when it is determined not to perform data combination, detecting, by the UE, the re-transmitted data packet. The present disclosure also provides a method for re-transmitting data at a base station side and a UE for implementing the above method.

Abstract: There are provided a base station, a mobile station and a method for downlink scheduling by the base station. The base station comprises a scheduling unit, configured to assign a downlink resource block and a number of streams, an antenna port, and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and a transmitting unit, configured to transmit downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity.

Abstract: Embodiments of the present disclosure provide a radio base station, a mobile station and a method for determining a transmitting power. A radio base station, according to an embodiment of the present disclosure, is connected with a plurality of mobile stations, wherein a first mobile station in the plurality of mobile stations can form at least one mobile station pair with other mobile stations. The radio base station comprises: a processing unit, configured to determine an initial value of a power factor of each mobile station pair according to state data of respective mobile stations in the mobile station pair, and determine an adjustment value of the power factor for the first mobile station according to state data of the first mobile station; and a transmitting unit, configured to transmit the initial value of the at least one mobile station pair and the adjustment value to the first mobile station.

Abstract: The present disclosure provides a method, User Equipment (UE) and base station for adjusting a Modulation and Coding Scheme (MCS). The method comprises: receiving, by a user equipment (UE), a first downlink data frame sent by a base station at a first moment, and estimating, by the UE, a first Signal to Interference and Noise Ratio (SINR) and a first Channel Quality Indicator (CQI) according to the first downlink data frame; estimating a second SINR and a second CQI according to a received second downlink data frame, wherein the second downlink data frame is sent by the base station at a second moment later than the first moment; calculating, by the UE, a MCS variation according to at least one of the first CQI, the second CQI, the first SINR or the second SINR; and feeding back, by the UE, the MCS variation to the base station.

Abstract: Embodiments of present invention provide a method for optimizing the rank of channel matrix, a wireless base and a mobile station. The method for optimizing the rank of channel matrix according to an embodiment of the present invention is applied to a wireless base to which multiple mobile stations are connected. The method includes: obtaining the historical state data of the multiple mobile stations; determining the optimal rank of channel matrix of a first mobile station of the multiple mobile stations according to the obtained historical state data of the multiple mobile stations; and transmitting to the first mobile station the optimal rank indicator indicating the optimal rank so as to cause the first mobile station to set its rank of channel matrix to be the optimal rank indicated by the optimal rank indicator.

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

Abstract: A method for transmitting control information in a wireless communication system includes: determining a link adaptation method of a user group according to quality of channels of each user in the user group; generating first control information according to common control information of all users in the user group and the link adaptation method corresponding to the user group, and transmitting the first control information to each user in the user group; obtaining contents of second control information according to particular control information of each user in the user group; performing link adaptation process for the contents of the second control information according to the link adaptation method corresponding to the user group, generating the second control information, and transmitting the second control information to each user in the user group.

Abstract: The embodiments of the present invention provide an uplink resource scheduling method, a wireless base station and a mobile station. The method comprises: generating group dedicated signaling respectively for mobile station groups managed by the wireless base station, wherein group dedicated signaling of each mobile station group indicates uplink resources allocated to the mobile station group; multiplexing the generated group dedicated signaling into different positions of a first channel and transmitting the multiplexed group dedicated signaling; generating mobile station dedicated signaling for each mobile station in each of the mobile station groups, wherein the mobile station dedicated signaling at least includes group information indicating the mobile station group to which the mobile station belongs; and multiplexing the generated mobile station dedicated signaling into a second channel and transmitting the multiplexed mobile station dedicated signaling.

Abstract: The present invention provides a search space configuration that is suitable for a communication system in which a plurality of fundamental frequency blocks are grouped together into a wide band. A base station apparatus (20) has a selection section (302) that selects a system band in fundamental frequency block units, a downlink control information generation section (306) that generates downlink control information for demodulating the data channels that are sent separately in the selected fundamental frequency blocks, and arranges, in the downlink control channel of a specific fundamental frequency block among a plurality of fundamental frequency blocks, a search space in which downlink control information for the plurality of fundamental frequency blocks is contained, and a transmission section (203) that transmits the downlink control channel in which the search space with the downlink control information is arranged.

Abstract: The embodiments of the present invention provide a mobile communication method, a wireless base station and a mobile station. The mobile communication method according to the embodiment of the present invention is applied to the wireless base station. The method comprises: determining resource group offset information used for a mobile station; offsetting an initial physical channel resource group allocated to the mobile station according to the resource group offset information; determining cyclic shift information of demodulation reference signal used for the mobile station according to unused physical channel resources in the offset physical channel resource group; and transmitting the resource group offset information and the cyclic shift information to the mobile station.

Abstract: A method for transmitting control information in a wireless communication system includes: determining a link adaptation method of a user group according to quality of channels of each user in the user group; generating first control information according to common control information of all users in the user group and the link adaptation method corresponding to the user group, and transmitting the first control information to each user in the user group; obtaining contents of second control information according to particular control information of each user in the user group; performing link adaptation process for the contents of the second control information according to the link adaptation method corresponding to the user group, generating the second control information, and transmitting the second control information to each user in the user group.

Abstract: To prevent throughput of a macro terminal connecting to a radio base station from deteriorating due to an interference signal from a relay station provided in a cell of the radio base station in a radio communication system using relay transmission techniques, a relay transmission method of the invention has a step in which a relay station receives data to a relay terminal from a radio base station via a backhaul link, a step in which the relay station allocates a radio resource to the relay terminal to a certain frequency region over a plurality of TTIs, and a step in which the relay station transmits the data to the relay terminal via an access link using the allocated radio resource.

Abstract: The present invention provides a radio base station apparatus and a resource allocation method that can improve the inequality of the amount of radio resources to allocate to UEs under relay nodes and improve the cell edge user throughput performance. The radio base station apparatus according to the present invention has a frequency bandwidth control section (113) that controls the frequency bandwidth for each radio relay station apparatus based on the quality of the backhaul links between the radio base station apparatus and a plurality of radio relay station apparatuses, and a transmission section that transmits downlink signals to the plurality of radio relay station apparatuses over the frequency bandwidth controlled by the frequency bandwidth control section (113).

Abstract: The present invention provides a search space configuration that is suitable for a communication system in which a plurality of fundamental frequency blocks are grouped together into a wide band. A base station apparatus (20) has a selection section (302) that selects a system band in fundamental frequency block units, a downlink control information generation section (306) that generates downlink control information for demodulating the data channels that are sent separately in the selected fundamental frequency blocks, and arranges, in the downlink control channel of a specific fundamental frequency block among a plurality of fundamental frequency blocks, a search space in which downlink control information for the plurality of fundamental frequency blocks is contained, and a transmission section (203) that transmits the downlink control channel in which the search space with the downlink control information is arranged.