Abstract: To provide a communication terminal capable of suppressing an increase in power consumption of a UE during multi-subframe scheduling, a communication terminal (10) includes a monitoring unit (11) that monitors control information containing allocation information of at least one subframe where downlink data is transmitted, and a control unit (12) that determines monitoring timing to monitor the control information in accordance with a decoding result of downlink data transmitted using the at least one subframe. The monitoring unit (11) monitors the control information at the determined monitoring timing.

Abstract: A system includes an eNB which is operable to communicate with one or UEs and a set of multiple transmit antennas associated with the eNB. The antennas are partitioned into multiple antenna subsets. In a first form of the method, one of the antennas is designated as a reference antenna and the reference antenna forms part of each antenna subset. In a second form of the method, one of the subsets is designated as a reference subset. The UE(s) are operable to compute multiple PMIs for the respective multiple subsets and to report the multiple PMIs to the eNB for the eNB to use in precoding. The first form involves computing a PMI for a given antenna subset independently of the PMIs of any of the other antenna subsets. The second form involves computing a PMI for a given subset based on or using the PMI for the reference subset.

Abstract: Provided is a wireless communication system that efficiently carries out communications between a wireless control device and a wireless device. A wireless control device (20) has a wireless resource allocation unit (22) and a wireless resource instruction unit (24). The wireless resource allocation unit (22) allocates wireless resources that are used by a wireless device (30) when wirelessly communicating with a wireless terminal (2). The wireless resource instruction unit (24) sends, to the wireless device (30), instructions for causing the allocated wireless resources to be used. The wireless device (30) has a wireless signal processing unit (32) and a wireless transmission unit (34). On the basis of the instructions from the wireless control device (20), the wireless signal processing unit (32) performs processing, for performing wireless communications using the allocated wireless resources, on data to be sent to the wireless terminal (2).

Abstract: A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

Abstract: A method and transmitting device are provided for coordinated multi-point transmission scheduling by a transmitting device over one or more heterogeneous wireless networks that include a set of clusters. Each of the clusters has a set of transmission points for serving a set of user equipment devices. The method includes determining constraints imposed on any of the user equipment devices. The method further includes receiving channel state information feedback from the user equipment devices. The method also includes obtaining user weights and buffer sizes. The method additionally includes iteratively determining a weighted sum of user rates based on the constraints, the channel state information feedback, the user weights, and the buffer sizes. The iteratively determining step determines the weighted sum of user rates based on an initial weighted sum of user rates determined for the user equipment devices without the constraints.

Abstract: A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

Abstract: There is provided generating precoders for joint transmission (JT) in a downlink coordinated multi-point transmission/reception (DL COMP) wireless communications system. The system includes a plurality of transmission points (TPs) operable to communicate with a plurality of user equipments (UEs). Each UE has one of the TPs as its serving TP. The method includes transmitting channel state information (CSI) from each UE to its serving TP, wherein the transmitted CSI includes precoder matrix indicators (PMI), and using the PMI to generate precoders for transmission of data from the plurality of TPs to the plurality of UEs.

Abstract: A MIMO system (100) and a method of generating a precoder for use in a MIMO system (100), when communicating with a UE (115), are provided. The method comprises receiving, from the UE (115), channel information relating to a channel on which data is transmitted; decomposing the channel information into components representing a transmission component and a signal strength component; and generating the precoder according to the transmission component and the signal strength component.

Abstract: A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

Abstract: Provided is a wireless communication system that efficiently carries out communications between a wireless control device and a wireless device. A wireless control device (20) has a wireless resource allocation unit (22) and a wireless resource instruction unit (24). The wireless resource allocation unit (22) allocates wireless resources that are used by a wireless device (30) when wirelessly communicating with a wireless terminal (2). The wireless resource instruction unit (24) sends, to the wireless device (30), instructions for causing the allocated wireless resources to be used. The wireless device (30) has a wireless signal processing unit (32) and a wireless transmission unit (34). On the basis of the instructions from the wireless control device (20), the wireless signal processing unit (32) performs processing, for performing wireless communications using the allocated wireless resources, on data to be sent to the wireless terminal (2).

Abstract: A method and system for data communication in a Multi-user Multiple-Input and Multiple-Output (MU-MIMO) system is provided. The method includes receiving, from a first UE of the plurality of UEs, first and second channel information relating to first and second subsets of antennae; generating first and second sub-precoders according to the first and second channel information; generating a precoder according at least in part to the first and second sub-precoders; and transmitting data to the first UE using the precoder.

Abstract: A relay communications system is described in which abase station is able to support both Frequency diversity R-PDCCH transmission and Frequency selective R-PDCCH transmission either within different cells, or within the same cell but not the same sub-frame or within the same cell and within the same sub-frame.

Abstract: A communication system in which a mobile communication device communicates with communication apparatus of the communication system uses radio frames that include a plurality of sub-frames. The mobile communication device receives information for use in identifying a first power ratio, said first power ratio representing a ratio of a power used by the communication apparatus for transmitting a reference signal to a first power used for transmitting data in a first sub-frame of a radio frame. The mobile communication device receives information for use in identifying and a second power ratio, the second power ratio representing a ratio of a power used by the communication apparatus for transmitting a reference signal to a second power used for transmitting data in a second sub-frame of said radio frame. The mobile communication device generates a measurement report including information calculated in dependence on at least one of the first and second power ratio.

Abstract: A system includes an eNB which is operable to communicate with one or UEs and a set of multiple transmit antennas associated with the eNB. The antennas are partitioned into multiple antenna subsets. In a first form of the method, one of the antennas is designated as a reference antenna and the reference antenna forms part of each antenna subset. In a second form of the method, one of the subsets is designated as a reference subset. The UE(s) are operable to compute multiple PMIs for the respective multiple subsets and to report the multiple PMIs to the eNB for the eNB to use in precoding. The first form involves computing a PMI for a given antenna subset independently of the PMIs of any of the other antenna subsets. The second form involves computing a PMI for a given subset based on or using the PMI for the reference subset.

Abstract: A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

Abstract: The present invention addresses the problem of providing technology which increases the accuracy for estimating quality of a communication channel even in a case in which transmission time limit frames have been set between neighboring cells.

Abstract: A relay communications system is described in which a base station is able to support both Frequency diversity R-PDCCH transmission and Frequency selective R-PDCCH transmission either within different cells, or within the same cell but not the same sub-frame or within the same cell and within the same sub-frame.

Abstract: The present approach is applied to a case where, in a radio communication system including a mobile station and a plurality of base stations that communicate with the mobile station in subframe units, each of the plural base stations makes the downlink transmission power to become lower by restricting downlink signals in particular subframes. Herein, the mobile station, if it is a mobile station that cannot designate two types of subframes for performing CQI measurement, calculates a single type of CQI in the cell formed by the base station without recognizing the particular subframes that the base station transmitted and transmits the calculated CQI value to the base station. Each of the plural base stations, when receiving a CQI value from the mobile station, corrects the CQI value into two types if the mobile station is a mobile station that cannot designate two types of subframes for performing CQI measurement.

Abstract: A method according to the present invention is for selecting User Equipment (UE) for scheduling/precoding within the coverage area of a communications node having a predefined codebook. The method includes: receiving at the communications node feedback information from each of the UEs within the coverage area of the communications node wherein the feedback information includes at least one precoder matrix indicator (PMI); generating at the communications node a precoder matrix based on the reported precoder matrix indicator from each UE; determining at the communications node correlation values for each UE in the coverage utilizing the precoder matrix; identifying a pair of UEs having minimum correlation values; and selecting the identified UEs for scheduling/precoding if the minimum correlation value is less than or equal to a threshold value.

Abstract: A method and transmitting device are provided for coordinated multi-point transmission scheduling by a transmitting device over one or more heterogeneous wireless networks that include a set of clusters. Each of the clusters has a set of transmission points for serving a set of user equipment devices. The method includes determining constraints imposed on any of the user equipment devices. The method further includes receiving channel state information feedback from the user equipment devices. The method also includes obtaining user weights and buffer sizes. The method additionally includes iteratively determining a weighted sum of user rates based on the constraints, the channel state information feedback, the user weights, and the buffer sizes. The iteratively determining step determines the weighted sum of user rates based on an initial weighted sum of user rates determined for the user equipment devices without the constraints.