Abstract: Methods and apparatuses for transmitting coding indication information and determining a precoding matrix, for use in resolving the problem that the resolution of code words in a codebook generated by using a combination of a beam vector subgroup and column selection cannot be flexibly adjusted.

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

Abstract: The present invention discloses a channel state information (CSI) feedback method and related device for an FD MIMO system, and is configured to support the scenario in which various CSI related information needs to be fed back after a CSI measurement in an FD MIMO system. The method comprises: a terminal receives a CSI feedback configuration group indicated by a base station and configuration information for performing a CSI feedback based on the CSI feedback configuration group; and the terminal performs a CSI measurement and feedback according to the CSI feedback configuration group and the configuration information, wherein the CSI feedback configuration group comprises at least one CSI feedback configuration, and the CSI feedback configuration is a downlink signal configuration for a downlink CSI measurement and feedback.

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

Abstract: The present application provides a channel state information (CSI) feedback and receiving method and device. The CSI feedback method by a UE comprises: determining, according to an indication of a base station, at least one CSI feedback configuration group configured by the base station, wherein each CSI feedback configuration group comprises at least one CSI feedback configuration; and upon determination of a need to report CSI, reporting, via a PUCCH or PUSCH, to the base station CSI acquired based on a first CSI feedback configuration, wherein the first CSI feedback configuration is a CSI feedback configuration determined, according to location information of a CSI feedback configuration in the most recent report or location information of a CSI feedback configuration indicated by the base station, from a corresponding CSI feedback configuration group by the UE.

Abstract: A reference signal mapping method and a reference signal mapping device are provided. The reference signal mapping method includes steps of: determining a position of a RE to which a CSI-RS has been mapped in accordance with an N-port reference signal pattern, N being equal to 12 or 16; and performing a resource mapping operation on the CSI-RS in accordance with the determined position of the RE. The position of the RE to which the CSI-RS has been mapped in the N-port reference signal pattern being determined in accordance with a position of the RE to which the CSI-RS has been mapped in one or more of a 2-port reference signal pattern, a 4-port reference signal pattern and an 8-port reference signal pattern. As a result, it is able to achieve the 12-port or 16-port CSI-RS mapping, thereby to achieve the 12-port or 16-port CSI-RS transmission.

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

Abstract: Disclosed are a channel status information (CSI) feedback and control method and device. The method comprises: a terminal receives trigger signaling sent by a base station, the trigger signaling being used for instructing the terminal to report CSI obtained within a specified measurement window; and the terminal reports the CSI that is measured by the terminal within the specified measurement window to the base station. Because a terminal reports only CSI that is measured by the terminal within a specified measurement window, the frequency of feeding back CSI by the terminal is reduced, and CSI feedback overheads are also reduced.

Abstract: Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale CSI feedback under an antenna system, wherein a UE may only need to feedback some pieces of PMI information, so that the complexity of the UE feeding back CSI is reduced, and the flexibility for a network side to control the UE to feed back the CSI is better. The channel state information (CSI) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (UE) to feed back CSI, the CSI at least comprising a first precoding matrix indicator (PMI) and a second PMI, the first PMI and the second PMI corresponding to the same precoding matrix; and the base station sending trigger signaling of CSI feedback to the UE, wherein indication information used for instructing whether the UE feeds back the first PMI and/or the second PMI is comprised.

Abstract: Disclosed are an interference information indicating method, and an interference cancelling method and device. The interference information indicating method comprises: network equipment determines interference information indicated to a user equipment (UE), the interference information being used for instructing the UE to perform all cancellation, partial cancellation, or no cancellation on interference in a received signal; and the network equipment indicates the interference information to the UE by signaling. By using the method and device provided by the embodiments of the present invention, network equipment can acquire interference information relevant to a UE, and can further transmit the interference information to the UE, thereby enabling the UE to perform, according to the interference information, interference cancellation on a received signal.

Abstract: Embodiments of the present application relate to the field of communications, and in particular, to a control information sending method and receiving method, a sender and a receiver, which are used for sending DCIs corresponding to DCI types to the receiver, thereby improving simplicity of interference suppression performed by the receiver. In the embodiments of the present application, a sender flexibly and optionally sends a first class of DCIs and/or a second class of DCIs.

Abstract: A method and apparatus of wireless communication between a base station and at least one user equipment. The method includes: transmitting an enhanced physical downlink control channel from the base station to the at least one user equipment using a demodulation reference signal antenna port; transmitting message from the base station to the at least one user equipment which is scheduled by the enhanced physical downlink control channel; receiving the message at the at least one user equipment; determining at the at least one user equipment whether the message was correctly received; and transmitting an ACK/NAK signal on an ACK/NAK resource determined from the enhanced physical downlink control channel from the at least one user equipment to the base station indicating whether the message was correctly received by the at least one user.

Abstract: The embodiments of the present disclosure provide a method and a device for constraining a codebook subset. The method includes steps of: determining codebook subset constraint parameters for all or parts of matrix sets for constructing a codebook respectively, each codebook subset constraint parameter indicating an available matrix in a corresponding matrix set; and transmitting the determined codebook subset constraint parameters to a UE. The number of the matrices in each matrix set for constructing the codebook is far less than the number of precoding matrices in the codebook.

Abstract: The present disclosure provides a CSI acquisition method. A network side device indicates a CSI feedback configuration group for aperiodic CSI feedback to a UE, and transmits DCI to the UE, the DCI configured to indicate the UE to perform the aperiodic feedback in accordance with an optimum CSI feedback configuration in the CSI feedback configuration group.

Abstract: A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.

Abstract: Disclosed are a channel state information feedback and acquisition method and device. The application comprises: acquiring, by a terminal, a first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources and a first corresponding relationship of the above configured by a network device; measuring, by the terminal and according to the first-dimension downlink reference signal resource, a first-dimension downlink reference signal, and selecting, by the terminal and according to the measured first-dimension PMI and the first corresponding relationship, a resource for measuring a second-dimension downlink reference signal, measuring, according to the resource, the second-dimension downlink reference signal, and feeding back channel state information, wherein the second-dimension reference signal is transmitted after forming a first-dimension beamforming weight.

Abstract: Within a wireless network, feedback information from user equipment (UE) to a control node (eNodeB) is necessary to support various functions. A UE receives an allocation from the eNodeB comprising a plurality of periodic transmission instances for a channel quality indicator (CQI) and a schedule comprising a plurality of periodic transmission instances for a rank indicator (RI), wherein the CQI comprises RI and other CQI fields. The UE then transmits an RI without transmitting the other CQI fields in a transmission instance allocated for both RI and other CQI fields.

Abstract: A method and apparatus of wireless communication between a base station and at least one user equipment. The method includes: transmitting an enhanced physical downlink control channel from the base station to the at least one user equipment using a demodulation reference signal antenna port; transmitting message from the base station to the at least one user equipment which is scheduled by the enhanced physical downlink control channel; receiving the message at the at least one user equipment; determining at the at least one user equipment whether the message was correctly received; and transmitting an ACK/NAK signal on an ACK/NAK resource determined from the enhanced physical downlink control channel from the at least one user equipment to the base station indicating whether the message was correctly received by the at least one user.

Abstract: Channel state information (CSI) feedback in a wireless communication system (100) is disclosed. User equipment (107) transmits a CSI feedback signal via a Physical Uplink Control CHannel (PUCCH) (108). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1) (203), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2)(204). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI (205), and a second report coding CQI, PMI1 and PMI2 (206). The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

Abstract: A system and method for providing both localized and distributed transmission modes for EPDCCH is disclosed, where one EPDCCH comprises of one or multiple CCEs. Localized versus distributed transmission may be defined in terms of the EPDCCH to CCE resource mapping. In a localized transmission CCEs are restricted to be contained within one PRB. In a distributed transmission a CCE spans over multiple PRBs. A UE can be configured to either receive the EPDCCH only in localized or only in distributed transmissions. A UE can also be configured to expect EPDCCH transmissions in both localized and distributed transmissions. In each PRB configured by the higher layer as an EPDCCH resource, 24 REs that may be used for any DMRS transmission are always reserved and not used for EPDCCH transmission.