The present disclosure relates to a 5G or pre-5G communication system for supporting a data rate higher than that of a 4G communication system such as an LTE system.

The present invention relates to a CSI reporting method and apparatus, and the method of a base station according to the present invention includes transmitting first reference signal information and second reference signal information, transmitting reference signals based on at least one of the first and second reference signal information, transmitting downlink control information (DCI) including information indicating whether the reference signals are transmitted based on the second reference signal information, and receiving Channel State Information (CSI) generated by measuring the reference signals.

Provided are a method and device for feeding back and receiving channel information. The method comprises: determining a candidate resource set, selecting M resources from the candidate resource set, and transmitting at least one of indication information or channel state information of the selected M resources to a first communication node, where M is a positive integer; a selection criterion for selecting the M resources from the candidate resource set is determined in at least one of following manners: a selection criterion or a selection criterion set is agreed with the first communication node, and a selection criterion or a selection criterion set is obtained according to received indication information transmitted by the first communication node, and the selection criterion set comprises at least one selection criterion.

Systems and methods for providing Channel State Information (CSI) feedback in a cellular communications network are disclosed. In some embodiments, a base station of a cellular communications network disables inter-subframe channel interpolation of CSI-RS estimates across subframes at the wireless device and receives one or more CSI reports from the wireless device that are generated by the wireless device with inter-subframe channel interpolation of C SI-RS estimates across subframes disabled in response to the base station disabling inter-subframe channel interpolation of CSI-RS estimates across subframes at the wireless device. In this manner, CSI feedback is improved particularly in embodiments in which the base station transmits a beamformed CSI-RS resource(s) and reuses the same CSI-RS resource(s) for different beams over time.

A method, by which a terminal transmits channel state information in a wireless communication system, comprises a step for performing one integrated CSI process, the step for performing one integrated CSI process comprising the steps of: receiving, from a base station, a first channel state information-reference signal related to a CSI-RS resource which is not pre-coded; reporting, to the base station, a first pre-coding matrix indicator derived on the basis of the first CSI-RS; receiving, from the base station, a second CSI-RS related to one CSI-RS resource of a beam-formed CSI-RS type; and reporting, to the base station, a second rank indicator/channel quality indicator/second PMI derived on the basis of the second CSI-RS.

Apparatuses and methods are disclosed for supporting a UE in reporting of a selection of an NZP CSI-RS resource to an eNB supporting FD-MIMO communication. Each NZP CSI-RS resource is associated with a unique NZP CRI (or Beam Index) on a given serving cell. The UE may select an NZP CSI-RS resource for CSI calculation and reporting to the eNB based on processed CSI-RS signals received at an antenna of the UE from the eNB of a serving cell of the UE based on a CSI-RS resource configuration for the UE signaled from the eNB. The UE may report a CRI and a CSI of the selected NZP CSI-RS resource to the eNB of the serving cell of the UE based on a CRI reporting configuration of the UE signaled from the eNB.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station (BS), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is received at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE. The UE may determine an uplink transmit beam for the scheduled uplink transmission based at least in part on receiving the transmission of the CSI-RS. Numerous other aspects are provided.

This specification provides a method for transmitting, by a user equipment (UE), a CSI (Channel State Information) report in a wireless communication system. More specifically, the method includes: receiving, from a base station, downlink control information (DCI) including information for triggering the CSI report; computing CSI based on the number of symbols related to a time for computing the CSI; and transmitting the CSI report to the base station, in which the number of symbols related to the time for computing the CSI is defined based on information for the number of antenna ports, information for a CSI-RS resource, information for a bandwidth granularity, and information for a CSI codebook type.

Systems and methods for providing Channel State Information (CSI) feedback in a cellular communications network are disclosed. In some embodiments, a base station of a cellular communications network disables inter-subframe channel interpolation of CSI-RS estimates across subframes at the wireless device and receives one or more CSI reports from the wireless device that are generated by the wireless device with inter-subframe channel interpolation of CSI-RS estimates across subframes disabled in response to the base station disabling inter-subframe channel interpolation of CSI-RS estimates across subframes at the wireless device. In this manner, CSI feedback is improved particularly in embodiments in which the base station transmits a beamformed CSI-RS resource(s) and reuses the same CSI-RS resource(s) for different beams over time.

Some demonstrative embodiments include devices, systems and/or methods of Time-Division Duplexing (TDD) Uplink-Downlink (UL-DL) configuration management. For example, a node may communicate a message including a cell identifier identifying a first cell controlled by the node, and a TDD configuration update to update at least one other node, which controls at least one second cell, with a TDD UL-DL configuration allocated by the node for communication within the first cell.

A method and apparatus for processing aperiodic channel state information (CSI) in a wireless communication system is provided. A user equipment (UE), receives a request for aperiodic CSI report, and assigns capability of the aperiodic CSI report for a master evolved NodeB (MeNB) and a secondary eNB (SeNB) in dual connectivity.