Abstract: Disclose is inter alia a user equipment for a frequency division duplex, FDD, system, comprising means for: —receiving, from a network, an uplink reference signal configuration; —receiving, from the network, an indication on an uplink reference signal precoding method; —receiving, from the network, a downlink reference signal; —estimating uplink channel wideband information based on the received downlink reference signal; —transmitting, to the network, an uplink reference signal based on the received uplink reference signal configuration, the estimated uplink channel wideband information and the indicated uplink reference signal precoding method; —receiving, from the network, uplink frequency selective precoding information, the uplink frequency selective precoding information having been determined based on the uplink reference signal and the indicated uplink reference signal precoding method; and—constructing an uplink frequency selective precoder based on the estimated uplink channel wideband information a

Abstract: In a base station of a radio access network, a distribution unit is configured to receive, through a radio head apparatus of the base station, a channel information signal transmitted by a user equipment over a radio channel, obtain based on the channel information signal compression model information indicating a neural network to be used for compression by the radio head apparatus amongst a set of neural networks, and sending the compression model information to the radio head apparatus. The radio head apparatus is configured to receive the compression model information from the central processing apparatus, receive a data signal from a user equipment over a radio channel, pre-process the data signal, including compress the data signal by using a neural network, the neural network being selected based on the compression model information sent by the distribution unit, and transmit the pre-processed data signal to the central processing apparatus.

Abstract: A method for operating a first apparatus (102) and the first apparatus (102) comprising at least one processor, at least one receiver and at least one memory including program code that, when executed by the at least one processor, cause the first apparatus (102) at least to receive at least one RRC configuration comprising a configuration of a channel state information, CSI, wideband report setting and a configuration of a CSI, subband report setting, receive at least one message (302) to trigger CSI wideband reporting and CSI subband reporting, and transmit a CSI wideband report (304) in a first slot comprising information on CSI wideband reporting and transmit a CSI subband report (306) comprising information on CSI subband reporting in a second slot based on the message (302) to trigger CSI wideband reporting and CSI subband reporting.

Abstract: An apparatus comprising means for performing: receiving a channel state reporting configuration, the channel state reporting configuration comprising information to enable determination of one or more channel state quantities, wherein determination of at least one of the one or more channel state quantities is based, at least in part, on a plurality of interference measurements taken at a plurality of times; determining at least one channel state quantity using, at least, a plurality of interference measurements taken at a plurality of different times, wherein the plurality of interference measurements are enabled, at least in part, by information in the channel state reporting configuration; and transmitting the determined at least one channel state quantity.

Abstract: An apparatus includes circuitry configured to: receive a radio resource control configuration including at least one channel state information reporting configuration indicating at least one channel state information quantity for which prediction is configured or enabled; receive at least one of a downlink reference signal and/or a downlink channel for at least one of channel measurement and/or interference measurement; determine the at least one channel state information quantity or at least one channel state information prediction model, based on at least one of a downlink reference measurement, and/or a downlink channel decoding outcome, and/or the at least one channel state information reporting configuration, and/or at least one prediction window; and transmit a channel state information report in uplink control information, based on the determining.

Abstract: Example embodiments provide signaling and configuration for model-based channel state information reporting by an apparatus. Instead of reporting a table of indices or quantized values in case of a several hypotheses, coefficients of a model for requested channel state information may be reported. Apparatuses, methods, and computer programs are disclosed.

Abstract: There is provided a method at a network node of a communication network, comprising: receiving an uplink reference signal from a user equipment; estimating, based on the received uplink reference signal, delay information regarding a delay profile of a communication channel between the user equipment and the network node and spatial information regarding the communication channel; applying both the delay information and the spatial information in precoding of at least one downlink reference signal; transmitting the at least one precoded downlink reference signal to the user equipment; and receiving, from the user equipment as a response to the transmission of the at least one precoded downlink reference signal, channel information, the channel information indicating at least non-zero coefficients of at least one channel transmission layer.

Abstract: A method, apparatus, and a computer-readable storage medium are provided for partial reciprocity-based adaptive port selection codebook configuration. A method, apparatus, and a computer-readable storage medium are provided for partial reciprocity- based adaptive port selection codebook configuration. In an example implementation, the method may include a user equipment receiving at least one channel state information reporting configuration from a network node, the at least one channel state information reporting configuration including precoding matrix indicator as reporting quantity and an adaptive port selection codebook configuration for the precoding matrix indicator and determining whether partial reciprocity operations for adaptive port selection precoding matrix indicator are activated, the determining based at least on information in a sounding reference signal (SRS) request field of a downlink control information, an active semi- persistent SRS, or a periodic SRS configured by higher layers.

Abstract: Techniques of generating CSI reports include designating at least one of the reports as a reference and the other reports as dependent on the reference. For example, a dependent CSI report may have a differential value of a CSI quantity rather than a raw value of the CSI quantity. Because generally for parameters in a CSI report, the differential quantity has a smaller range of values than the raw values of the CSI quantity, a quantization of the differential value of the CSI quantity will have fewer bits than the raw value; for example, for L1-RSRP, the raw value has 7 bits while the differential value has 4 bits. In another example, a dependent value of a CSI quantity is a flag indicating that the CSI quantity value is located in a reference CSI report.

Abstract: An apparatus includes circuitry configured to: receive a radio resource control configuration including at least one channel state information reporting configuration indicating at least one channel state information quantity for which prediction is configured or enabled; receive at least one of a downlink reference signal and/or a downlink channel for at least one of channel measurement and/or interference measurement; determine the at least one channel state information quantity or at least one channel state information prediction model, based on at least one of a downlink reference measurement, and/or a downlink channel decoding outcome, and/or the at least one channel state information reporting configuration, and/or at least one prediction window; and transmit a channel state information report in uplink control information, based on the determining.

Abstract: In accordance with an example embodiment of the present invention, a method, apparatus and software program product for partitioning channel state information into groups of different priority levels, wherein said channel state information comprises non zero coefficients and said partitioning comprises using at least one permutation function to prioritize said non-zero coefficients substantially based on an amplitude distribution of said non zero coefficients to determine mapping of said non zero coefficients to said groups, and further for omitting zero or more non-zero coefficients in accordance with said amplitude distribution based prioritizing from said groups, and for transmitting remaining non zero coefficients in said groups.

Abstract: Techniques of performing CSI reporting include identifying a cluster of TRPs sharing common information in their CSI and transmitting a complete CSI report to a selected TRP of the cluster while transmitting partial CSIs reports to other TRPs of the cluster. Along these lines, in an example implementation, a UE receives a CSI-RS from a network, with the CSI-RS carrying a plurality of reference symbols from a plurality of TRPs. Based on the plurality of symbols, the UE generates TRP data representing CSI feedback for each of the TRPs. From the CSI feedback, the UE identifies, as a cluster, a subset of the TRPs that share common information within the CSI feedback. The UE then sends first identification data identifying the subset of the TRPs that make up the cluster to the network.

Abstract: A UE measures RSs from at least two different groups of RSs transmitted from at least two different TRPs from corresponding different base stations. The UE calculates CSI for the at least two TRPs based on RSs configured in the at least two different groups. The UE sends report(s) corresponding to the calculated CSI, the report(s) comprising information for at least the two TRPs of a number of reported hypotheses for a single-TRP measurement and a corresponding association to a number of configured hypotheses for a single-TRP measurement. A TRP, under control of the base station, sends the RSs and receives the report(s).

Abstract: An apparatus (101) comprising means for performing: grouping columns of a linear combination coefficient matrix into a predefined number of clusters; and sending at least one of the clusters in a second part of a uplink control signalling transmission of a channel to an access node, wherein the uplink control signalling transmission comprises a first part and the second part.

Abstract: There is provided an apparatus, said apparatus comprising means for receiving a multiple input multiple output signal from a network, determining a frequency domain basis subset for each layer of the multiple input multiple output signal, determining from the frequency domain basis subset a number, MC, of frequency domain components common to each layer, determining, from the frequency domain basis subset, a number of layer-specific frequency domain components and providing to the network, in uplink control information, an indication of the frequency domain components common to each layer and the layer-specific frequency domain components.

Abstract: Systems, methods, apparatuses, and computer program products for dynamic and partial sharing of the channel measurement downlink (DL)-reference signal (RS) resources are provided.

Abstract: In accordance with an example embodiment of the present invention, a method, apparatus and software program product for partitioning channel state information into groups of different priority levels, wherein said channel state information comprises non zero coefficients and said partitioning comprises using at least one permutation function to prioritize said non-zero coefficients substantially based on an amplitude distribution of said non zero coefficients to determine mapping of said non zero coefficients to said groups, and further for omitting zero or more non-zero coefficients in accordance with said amplitude distribution based prioritizing from said groups, and for transmitting remaining non zero coefficients in said groups.