Abstract: There is provided mechanisms for event-based triggering of second channel quality measures. A method is performed by a network node. The method comprises obtaining a first measure of channel quality of a radio propagation channel extending between the network node and a user equipment from measurements on an uplink signal received from the user equipment. The method comprises triggering, when determining that the first measure of channel quality causes an event-based triggering condition to be fulfilled, transmission of a further uplink signal from the user equipment for the network node to obtain a second measure of the quality of the radio propagation channel. Determining that the first measure of channel quality causes the event-based triggering condition to be fulfilled involves making a comparison between the first measure of channel quality and a reference channel quality.

Abstract: A computer implemented method performed by a first node in a communications network for setting a power control configuration parameter with which a user equipment, UE, should send further transmissions to a second node in the communications network. The method includes: obtaining the power control configuration parameter with which the UE should send the further transmissions to be received by the second node, the power control configuration parameter being based on an estimated received power of an initial transmission sent from the UE and received by the second node, as measured at the second node. the method further includes sending a second message to the UE indicating the obtained power control configuration parameter.

Abstract: There is disclosed a method of operating a measuring radio node in a wireless communication network, the method includes transmitting signaling based on delay spread information, the delay spread information being based on and/or representing delay spread associated to received reference signaling. There are also disclosed related devices and method.

Abstract: A network node signals to a wireless communication device which precoders in a codebook are restricted from being used. The network node in this regard generates codebook subset restriction signaling that, for each of one or more groups of precoders, jointly restricts the precoders in the group by restricting a certain component (e.g., a certain beam precoder) that the precoders in the group have in common. This signaling may be for instance rank-agnostic signaling that jointly restricts the precoders in a group without regard to the precoders' transmission rank. Regardless, the network node sends the generated signaling to the wireless communication device.

Abstract: The present disclosure relates to methods to transmit and/or receive data in a wireless communications network, and a device performing the methods. In an aspect, a method of fora device configured to transmit data in a wireless communications network is provided. The method comprises acquiring a current value of at least one property affecting performance of the data transmission and determining a level of the performance attained with the current value of said at least one property. The method further comprises selecting, based on the determined level of the performance, at least one device configuration of a plurality of different device configurations allowing successful data transmission for the determined level of the performance and performing the data transmission applying the selected at least one device configuration.

Abstract: A method performed by a Baseband Unit, BBU, for assisting a Radio Unit, RU, to perform beamforming for a communication between a User Equipment, UE, and a base station in a wireless communications network using a multiple antenna system for is provided. The BBU and the RU are associated with the base station. The BBU obtains (302) channel taps related to a number of subcarriers. The BBU selects (303) a subset of the channel taps. The BBU sends (304) to the RU, the selected subset of the channel taps and information identifying the selected subset of channel taps. The selected subset of channel taps and information identifying the selected subset of channel taps assists the RU to perform beamforming for the communication between the UE and the base station.

Abstract: According to one embodiment, a method at a transmitting device is provided. The method includes transmitting at least two groups of reference signals, wherein a first and a second group of the at least two groups each correspond to transmission on a plurality of antenna ports, the first group corresponds to a smaller number of antenna ports than the second group. The maximum combined power on the antenna ports may correspond to the first and second group is substantially the same. One or more of the antenna ports corresponding to the first group may be formed according to at least one of a first and a second mechanism. User equipment and base station comprising processing circuitry to perform steps of method according to the various embodiments are also provided.

Abstract: The disclosure includes a host operating in a communication system to provide an over-the-top (OTT) service. The host includes processing circuitry configured to initiate transmission of user data to a network node in a cellular network to a user equipment (UE). The network node is configured to receive a CSI report for a downlink channel from a wireless device and transmit the user data from the host to the UE to provide the OTT service based on the CSI report. The CSI report includes a set of reported coefficients; an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and an indication of a payload size of the set of the reported coefficients.

Abstract: A host configured to operate in a communication system to provide an over-the-top (OTT) service is described. The host initiates transmission of user data to a network node. In order to transmit the user data to a user equipment, the network node receives a channel state information (CSI) report for a downlink channel, the CSI report indicating a plurality of precoder vectors, wherein each of the precoder vectors corresponds to a frequency sub-band of a bandwidth of the downlink channel, each precoder vector being expressed as a linear combination of spatial-domain components and frequency-domain components. The network nodes determines precoding to use for transmitting data to the UE based at least in part on the CSI report. The network nodes transmits the user data from the host to the UE according to the determined precoding to provide the OTT service.

Abstract: A method performed by a wireless device (510, 800, 1200) for reporting channel state information (CSI) for a downlink channel is disclosed. The method comprises transmitting (601, 705) a CSI report for the downlink channel to a network node (560, 1100), the CSI report comprising: a set of reported coefficients; an indication of how the network node is to interpret the set of reported coefficients; and an indication of a payload size of the set of the reported coefficients.

Abstract: There is provided mechanisms for transmitting uplink reference signals. A method is performed by a terminal device. The method comprises obtaining, from a network node, a configuration of transmission of the uplink reference signals. The configuration comprises an indication of a first frequency interval in which the uplink reference signals are to be transmitted. The method comprises distributing transmission power available for transmitting the uplink reference signals over the first frequency interval based on channel information for the first frequency interval. The method comprises transmitting the uplink reference signals in accordance with the distributed transmission power.

Abstract: A method performed by a network node for handling channel feature estimates associated with a radio channel between a User Equipment, UE, and the network node in a wireless communications network is provided. The network node obtains a channel feature estimates associated to the radio channel estimated at a first point in time. Data representing the channel feature estimates has a first size. The network node compresses the channel feature estimates at the first point in time by replacing them with updated channel feature estimates that at the subsequent point in time fulfils a respective threshold condition. The data representing the updated channel feature estimates has a second size. The second size is smaller than the first size. The network node then adjusts parameters for a transmission at the radio channel based on the updated channel feature estimates.

Abstract: In certain embodiments, a method performed by a wireless device comprises estimating a channel state of a downlink channel and transmitting a CSI report for the downlink channel based on the channel state. The CSI report indicates a plurality of precoder vectors, each corresponding to a frequency sub-band of the bandwidth of the downlink channel, a precoder vector being expressed as a linear combination of spatial-domain components and frequency-domain component wherein each of the spatial-domain components is associated with a respective set of one or more frequency-domain components.

Abstract: A host configured to operate in a communication system to provide an over-the-top (OTT) service is described. The host initiates transmission of user data to a network node. In order to transmit the user data to a user equipment, the network node receives a channel state information (CSI) report for a downlink channel, the CSI report indicating a plurality of precoder vectors, wherein each of the precoder vectors corresponds to a frequency sub-band of a bandwidth of the downlink channel, each precoder vector being expressed as a linear combination of spatial-domain components and frequency-domain components. The network nodes determines precoding to use for transmitting data to the UE based at least in part on the CSI report. The network nodes transmits the user data from the host to the UE according to the determined precoding to provide the OTT service.

Abstract: A method performed by a radio unit for handling a number of received radio signals over an array of antennas comprised in the radio unit. The radio unit transforms the number of received radio signals into a number of sequences of complex symbols. The radio unit further filters the number of sequences of complex symbols by inputting the number of sequences of complex symbols into a trained computational model comprising an alternating sequence of linear and nonlinear functions and thereby obtaining a reduced number of sequences. The radio unit further transmits the reduced number of sequences to a baseband unit over a front-haul link.

Abstract: Systems and methods are disclosed herein for determining a power to be used for a set of antenna ports for a physical uplink shared channel transmission. In some embodiments, a User Equipment (UE) comprises processing circuitry configured to derive a power P to be used for uplink power control for a physical uplink shared channel transmission and determine a power to be used for a set of antenna ports based on the power P according to a rule that depends on whether the UE is utilizing codebook based transmission or non-codebook based transmission for the physical uplink shared channel transmission. The set of antenna ports is antenna ports on which the physical uplink shared channel transmission is transmitted with non-zero power.

Abstract: According to some embodiments, a method is performed by a user equipment for reporting channel state information. The user equipment is configured with two or more channel state information reference signal, CSI-RS, resources in a CSI-RS resource set. The method comprises: selecting at least two CSI-RS resources from the CSI-RS resource set, wherein each of the at least two selected CSI-RS resources are associated to a set of spatially multiplexed layers, wherein different sets comprise different layers; determining a preferred precoder matrix for the selected CSI-RS resources; and transmitting a CSI report indicating the selected CSI-RS resources and the preferred precoder matrices. The method may further comprise calculating a channel estimate for the selected CSI-RS resources, and determining a channel quality indicator, CQI, corresponding to a hypothetical transmission from a plurality of effective channels where layers transmitted through the effective channels mutually interfere.

Abstract: Abstract: A method performed by a wireless device (510, 700, 1100) is disclosed. The wireless device obtains (601) a configuration for a sub-band channel quality indicator (CQI) granularity and a sub-band precoding matrix indicator (PMI) granularity for the wireless device. The wireless device determines (602) channel state information (CSI) feedback according to the configured sub-band CQI granularity and the sub-band PMI granularity. The sub-band PMI granularity corresponds to a first sub-band size and the sub-band CQI granularity corresponds to a second sub-band size. The first sub-band size is smaller than the second sub-band size. The wireless device transmits (603), to a network node (560, 1000), the determined CSI feedback.

Abstract: A method performed by a wireless device for transmitting a channel state information (CSI) report for a downlink channel comprises obtaining a first set of candidate frequency-domain components and determining a set of spatial-domain components. The method comprises determining a second set of candidate frequency-domain components as a subset of the first set of candidate frequency-domain components. The method comprises determining, for each spatial-domain component of the set of spatial-domain components, a spatial-domain component-specific set of frequency-domain components as a subset of the second set of candidate frequency-domain components. The method comprises transmitting, to a network node, the CSI report.

Abstract: A network node determines parameters indicating a compression function for compressing downlink channel estimates, and a decompression function. The network node transmits the parameters, receives compressed downlink channel estimates, and decompresses the compressed downlink channel estimates using the decompression function. A terminal device receives the parameters, forms the compression function, compresses downlink channel estimates using the compression function, and transmits the compressed downlink channel estimates. The compression function comprises a first function formed based on at least some of the parameters, a second function which is non-linear, and a quantizer. The first function is configured to receive input data, and to reduce a dimension of the input data. The decompression function comprises a first function configured to receive input data and provide output data in a higher dimensional space than the input data, and a second function which is non-linear.