At a UE, a rank indication is determined for multi-rank CSI feedback for a subband. The UE selects one of multiple combinations of first and second offset levels for the subband to indicate the determined rank indication. Each offset level is for one of two different codewords and denotes an offset between an MCS class reported in a subband CQI and an MCS class in a wideband CQI. The UE transmits one or more indications of the first and second offset levels. A base station receives the one or more indications, and determines the rank indication based on the one or more indications of the first and second offset levels. The base station schedules, based on the determined rank indication, data for transmission to the user equipment using one or multiple ranks.

Provided is a method for generating inter-cell information for inter-cell interference removal in a wireless communication system. A method by which a terminal removes inter-cell interference comprises the steps of: receiving a signal from a serving cell and a neighboring cell adjacent to the serving cell; identifying the priority of the serving cell for feedback of channel information on the basis of an identifier of the cell and a resource block; identifying whether there is feedback of channel information on the signal received on the basis of the priority; and transmitting the channel information to a base station of the serving cell according to the identification of whether there is feedback.

The present disclosure relates to a network information analysis in a wireless communication system, and an analysis method comprises the steps of: receiving information on channel quality measured by a terminal; and outputting information on whether a carrier aggregation (CA) coverage mismatch occurs at a location where the channel quality has been measured, which is determined on the basis of the information on the channel quality. Further, the present disclosure comprises other embodiments as well as the above-descried embodiment.

Methods, systems, and devices for wireless communications are described. A set of uplink control channel resources that are configured for acknowledgment transmissions may be shared among user equipments (UEs) that are enabled to receive multicast communications. Each of the shared set of uplink control channel resources may be associated with set(s) of channel state information. UEs may measure a multicast channel to determine channel state information for the multicast channel. After failing to receive a multicast transmission, UEs may transmit an acknowledgment feedback message over one of the shared uplink control channel resources that is associated with the set of channel state information determined by the UE. A base station that receives the acknowledgment feedback message may transmit a multicast retransmission for the UEs using transmission parameters that are adapted for the set(s) of channel state information associated with the occupied uplink control channel resource.

A wireless communication device and a wireless communication method. The wireless communication device includes one or more processors. The processor is configured to estimate an equivalent channel from a base station to user equipment based on a user equipment specific reference signal from the base station, and generate, according to the estimated equivalent channel, a channel state indication used to be fed back to the base station.

Disclosed is a wireless communication base station apparatus whereby it is possible to prevent degradation of throughput of LTE terminals, even when LTE terminals and LTE+ terminals are present together. In this apparatus, a setting section (105) sets in each subframe a resource block in which is arranged a reference signal that is employed solely by LTE+ terminals, based on the pattern of arrangement of reference signals employed solely by LTE+ terminals. In the case of symbols that are mapped to antennas (110-1) to (110-4), an arrangement section (106) arranges the characteristic cell reference signals employed by both LTE terminals and LTE+ terminals in all of the resource blocks in a single frame. In contrast, in the case of the symbols that are mapped to the antennas (110-5) to (110-8), the arrangement section (106) arranges in some of the resource blocks, that are set in accordance with the setting results input from a setting section (105), the characteristic cell reference signals that are employed solely by the LTE+ terminals.

According to one or more embodiments, a network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to: receive a channel state information, CSI, report indicating a bias of the CSI report; determine the bias of the CSI report based at least on the indication; and set an initial outerloop link adaptation, OLLA, based at least on the determined bias of the CSI report.

A method, network node and antenna system providing multilayer digital sectors for advanced antenna systems are provided. According to one aspect, a first set of beams on a first frequency are steered to different directions such that only sidelobes of beams of the first set overlap in gaps between the main beams of the first set, while a second set of at least one beam on a second frequency are steered into at least one gap between the beams of the first set.

The present disclosure provides a method for transmitting uplink control information, a method for receiving uplink control information, a method for configuring a downlink HARQ feedback function, a terminal and a base station. The method for transmitting uplink control information comprises: transmitting uplink control information to a base station, wherein the uplink control information comprises at least one of decoding statistical information for downlink transmission, suggestion information for downlink scheduling, or channel quality related information.

A method of receiving multicast transmission from a base station includes receiving allocation information about a feedback channel including a plurality of resources shared by another terminal, determining feedback information based on an estimated channel with the base station, determining a plurality of transmission power levels respectively corresponding to the plurality of resources based on the feedback information, and transmitting channel feedback to the base station on the feedback channel based on the plurality of transmission power levels.