Various additional and alternative aspects are described herein. In some aspects, the present disclosure provides techniques for determining timing conditions for uplink control information (UCI) processing by a user equipment (UE).

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a priority of CSI reporting in a mobile communication system, and provides a method in which a UE performs CSI reporting with high priority according to the priority. The method includes receiving channel state information (CSI) feedback configuration information from a base station; identifying a CSI reporting to be performed based on the CSI feedback configuration information, as a result of two CSI reportings overlapping; and performing the identified CSI reporting to the base station. The CSI reporting is identified based on types of CSI reportings, and a CSI reporting associated with a reference signal received power (RSRP) is prioritized over a CSI reporting that is not associated with the RSRP.

A network node configured to communicate with a plurality of wireless devices is provided. The network node includes processing circuitry configured to: receive partial Channel State Information, CSI, from each of the plurality of wireless devices; determine a first plurality of precoders based at least in part on the partial CSI received from each of the plurality of wireless devices where each precoder of the first plurality of precoders is associated with a respective one of the plurality of wireless devices; determine a second plurality of precoders based at least in part on the first plurality of precoders; and optionally cause multiple-user multiple-input multiple-output, MU-MIMO, transmission to the plurality of wireless devices based at least in part on the plurality of second precoders.

A method of transmission over multiple wireless channels in a multiple antenna system includes storing channel modulation matrices at a transmitter; receiving quantized channel state information at the transmitter from plural receivers; selecting a transmission modulation matrix using the quantized channel state information from the stored channel modulation matrices; and transmitting over the multiple channels to the plural receivers using the selected transmission modulation matrix. In another embodiment, the method includes storing, at one or more receivers, indexes of modulation matrices generated by a capacity enhancing algorithm; upon a selected one of the one or more receivers receiving a transmission from the transmitter, the selected receiver selecting a modulation matrix from the stored modulation matrices that optimizes transmission between the transmitter and the selected receiver; the selected receiver sending an index representing the selected modulation matrix; and receiving the index at the transmitter from the selected receiver.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a message indicating, for each or multiple partial bands, a set of possible channel state information reference signal (CSI-RS) configurations. The UE may further receive downlink control information (DCI) from a base station, which may indicate a set of downlink resource associated with a first partial band. The UE may select a first CSI-RS configuration from the set of possible CSI-RS configurations for the first partial band based on the DCI, and when the base station transmits CSI-RS, the UE may obtain CSI-RS measurements over the first partial band during the set of downlink resources using the selected first CSI-RS configuration.

A base station that communicates with a plurality of user terminals in a mobile communication system in which a radio signal including a reference signal for estimating a channel characteristic is transmitted and received, comprises: a control unit that changes a reference signal density that is a density of the reference signal applied to communication with the plurality of user terminals. The control unit calculates a statistics amount of communication quality information acquired for all the plurality of user terminals, and changes the reference signal density on the basis of the statistics amount.

A method for wireless communication by a terminal, a method for wireless communication by a base station, the terminal, and the base station, are provided. The method for wireless communication by the terminal includes receiving first information comprising a muting subframe interval, a subframe offset, and a muting position of a resource element in a resource block, checking presence of a data in a subframe, determining the resource element to be muted in the subframe based on the muting subframe interval, the subframe offset, and the muting position, if the data is present, and receiving the data on a physical downlink shared channel (PDSCH) based on the result of the determining step.

The present invention relates to a method for allowing a terminal to transmit cone or more pieces of channel state information (CSI) in a wireless communication system, and the method for transmitting the CSI comprises the steps of: determining CSI reference resources from a subframe which is to transmit the one or more pieces of CSI; and transmitting the one or more pieces of CSI measured in the CSI reference resources wherein the determination of the CSI reference resources uses measurement sets which include one or more interference measurement sets and one or more signal measurement sets, and if the CSI reference resources are included in an overlapping manner in two or more of the one or more interference measurement sets and the one or more signal measurement sets, a resource for measuring interference or a signal is separated within the CSI reference resources.

This application relates to the communications field, and provides a transmission mode determining method and an apparatus, to better select a transmission mode and/or a transmission parameter of data autonomously. The transmission mode determining method includes: A first device measures a first resource set based on first information, to obtain a first measurement value, where the first information includes at least one of the following information: a subcarrier spacing of the first resource set, a quality of service parameter of first data, and feedback information between the first device and a second device, and the first resource set is to be used to transmit the first data. The first device determines a transmission mode of the first data based on the first measurement value, and/or determines a transmission parameter of the first data based on the first measurement value.

The present disclosure relates to methods for reporting channel state information. The present disclosure also provides mobile stations for performing these methods, and computer readable media the instructions of which cause the mobile station to perform the methods described herein. For this purpose, the mobile station receives a trigger message that triggers the reporting of channel state information for at least one of the plurality of downlink component carriers, the trigger message being received in a subframe n.sub.Trigger, and reports the triggered channel state information for the at least one of the plurality of downlink component carriers based on reference signals present on the at least one of the plurality of downlink component carriers, in a subframe n.sub.Report later than n.sub.Trigger. The received trigger message indicates that the reference signals are present in a subframe n.sub.RS on the at least one of the plurality of downlink component carriers, where n.sub.Trigger≦n.sub.RS<n.sub.Report.