Abstract: An electronic device at a base station end includes a processing circuit, the processing circuit being configured to: configure, in response to request signalling from a user equipment, an aperiodic beam-forming reference signal relevant to a first beam group for the user equipment, wherein the first beam group is determined by a base station according to channel state information periodically fed back by the user equipment; generate downlink control information, so as to indicate that the user equipment feeds back beam selection information according to the aperiodic beam-forming reference signal; determine, according to the beam selection information, one or a plurality of candidate beams and one or a plurality of corresponding second pre-coding codebooks; and determine an effective pre-coding codebook based on the one or multiple second pre-coding codebooks.

Abstract: An electronic device on the user side comprising a processing circuitry configured to report to a network control device a first type of channel state information (CSI) by using a resource for the first type of channel state feedback allocated by the network control device; make a determination that a second type of channel state feedback is required; and notify the network control device of the determination.

Abstract: An electronic device at a base station end includes a processing circuit, the processing circuit being configured to: configure, in response to request signalling from a user equipment, an aperiodic beam-forming reference signal relevant to a first beam group for the user equipment, wherein the first beam group is determined by a base station according to channel state information periodically fed back by the user equipment; generate downlink control information, so as to indicate that the user equipment feeds back beam selection information according to the aperiodic beam-forming reference signal; determine, according to the beam selection information, one or a plurality of candidate beams and one or a plurality of corresponding second pre-coding codebooks; and determine an effective pre-coding codebook based on the one or multiple second pre-coding codebooks.

Abstract: Provided in the disclosure are an electronic device and method for a network control terminal, and an electronic device and method for a network node. The electronic device and method for a network control terminal comprise: a processing circuit configured to determine, based on first indication information from an adjacent network control terminal, that a network node served by the present network control terminal measures a channel state information reference signal (CSI RS) port of reference signal receiving power (RSRP) of same, wherein the first indication information indicates an interference state of the CSI RS port used by the corresponding adjacent network control terminal; and determine, based on a measurement result from the network node, the adjacent network control terminal interfering with the network node, and the CSI RS port thereof.