Abstract: A method, network node and wireless device for transmitting and decoding repeated physical downlink control channel (PDCCH) messages are disclosed. According to one embodiment a method implemented in a wireless device (WD) includes receiving multiple transmissions of a PDCCH message, each of the multiple transmissions of the PDDCH message being repeated in a repetition set. The method further includes monitoring the multiple received PDCCH transmissions to obtain scheduling information for a physical uplink shared channel (PUSCH) transmission or a physical downlink shared channel (PDSCH) reception.

Abstract: Devices, systems, and methods described herein may improve aperiodic CSI-RS handling in mixed numerology environments. An exemplary method includes operations of receiving a downlink control information (DCI) message carried by a Physical Downlink Control Channel (PDCCH) on a second carrier, wherein the second carrier uses a second OFDM numerology, obtaining an aperiodic CSI-RS slot offset from the DCI message, determining a reference slot in the first numerology, determining the slot of the aperiodic CSI-RS based on the reference slot and the aperiodic CSI-RS slot offset, and receiving or transmitting the aperiodic CSI-RS in the determined slot.

Abstract: Embodiments herein relate to e.g. a method performed by a first network node (12) for handling communication of data of a first user equipment, UE, (10) in a communication network. The first network node initiates a measurement of interference from a second network node (13) towards the first network node, and/or from a second UE (10) of the second network node (13) towards the first UE of the first network node (12), wherein the measurement is based on a knowledge of time division duplex, TDD, configuration of the second network node (13), and wherein the first network node is operated by a different operator than the second network node.

Abstract: There is provided mechanisms for configuring resources for downlink CSI measurements. A method is performed by a network node. The method comprises configuring, within a radio frame, the resources for downlink CSI measurements. The resources for downlink CSI measurements comprise at least two resources for interference measurements and at least one resource for channel measurements. Each resource for interference measurement is configured in its own slot within the radio frame. The method comprises transmitting configuration information. The configuration information specifies slot locations of the at least two resources for interference measurement and the at least one resource for channel measurement within the radio frame. The method comprises transmitting, within the radio frame, a reference signal in the at least one resource for channel measurements.

Abstract: When a TRP performs a TRP beam sweep for a WD with multiple antenna arrangements and the WD is expected to perform an UL transmission (e.g., the WD has at least a threshold amount of data in its transmit buffer) and UL beam selection is based on DL beam selection, in one embodiment the WD takes the available output power of the different antenna arrangements in to account during RSRP calculations for the different candidate TRP TX beams such that the RSRP from an antenna arrangement that has lower available output power is weighted less compared to the RSRP measured from an antenna arrangement that has higher available output power.

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 technique for transmitting reference signals (RS), from a first station using a transmit antenna (400) with a number of antenna ports to a second station for determining channel state information (CSI), of a radio channel between the first station and the second station is described. As to a method aspect of the technique, a first set of precoders (502) is defined for the number of antenna ports. Based on the first set, a second set of precoders (702) is derived for the number of antenna ports. A second rank of the second set of precoders (502) is different from a first rank of the first set of precoders (702). The second rank of the second set is less than the number of antenna ports (402). Each of the antenna ports is associated with non-zero energy by at least one of the precoders (702) of the second set. The RS are transmitted using each of the precoders (702) of the second set.

Abstract: A method is performed by a wireless device for transmitting a Sounding Reference Signal, SRS. The method comprises receiving downlink control information triggering an aperiodic SRS transmission, and identifying a slot indicated by the downlink control information. If the slot indicated by the downlink control information is a downlink slot, the wireless device transmits the SRS in a slot that is not a downlink slot.

Abstract: A user equipment, base station and methods are provided. The user equipment includes processing circuitry configured to obtain an indication of a resource mapping for a first radio access technology, RAT, that allows for co-existence with a second RAT within at least a portion of a transmission band, and determine communication resources based on the obtained resource mapping indication.

Abstract: Methods and apparatuses are disclosed for a closed-loop remote interference management framework. In one embodiment for a victim node, a method includes determining one of at least two messages corresponding to a closed-loop feedback for remote interference mitigation, the at least two messages comprising a first message and a second message, the first message providing a positive mitigation indication and the second message providing a negative mitigation indication, and transmitting the determined one of the at least two messages to another network node. In another embodiment for an aggressor node, a method includes receiving one of at least two messages corresponding to a closed-loop feedback for remote interference mitigation, and taking a remote interference mitigation action based on the received one of at least two messages.

Abstract: A method, system and apparatus are disclosed. In one or more embodiments, a network node for remote interference identification is provided. The network node includes processing circuitry configured to cause transmission of at least one reference signal, RS, based at least in part on at least one RS sequence and at least one time occasion. An identifier of the network node is mapped to the at least one RS sequence and the at least one time occasion.

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: Systems and methods for Channel State Information (CSI) feedback for multiple Transmission Points (TRPs) in a cellular communications network are disclosed. Embodiments of a method of operation of a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device for CSI feedback comprises receiving a configuration comprising N Non-Zero Power (NZP) CSI Reference Signal (CSI-RS) resources each associated with a different one of N TRPs or N sets of NZP CSI-RS resources each associated with a different one of the N TRPs. The method further comprises receiving a request for CSI feedback based on the configuration, selecting a preferred subset of the NZP CSI-RS resources comprised in the N NZP CSI-RS resources or the N sets of NZP CSI-RS resources, and reporting, to a base station, CSI based on the selected preferred subset of the NZP CSI-RS resources.

Abstract: A user equipment, base station and method for transmitting semi-persistent channel state information (SP-CSI) on a physical uplink shared channel (PUSCH) are provided. The user equipment includes processing circuitry configured to receive a control signaling message the control signaling message configuring the user equipment with at least one SP CSI report configuration on the PUSCH, and the message identifying a SP CSI reporting periodicity. The user equipment also receives physical layer control signaling identifying and activating the at least one SP CSI report configuration. Transmitter circuitry is configured to transmit a plurality of SP CSI reports, the reports being transmitted with the periodicity and according to the physical layer control signaling and the control signaling message.

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 base station of enabling a User Equipment (UE) to determine a precoder codebook in a wireless communication system is provided. The base station transmits, to the UE, information regarding precoder parameters enabling the UE to determine the precoder codebook. The precoder parameters are associated with a plurality of antenna ports of the base station. The precoder parameters relate to a first dimension and a second dimension of the precoder codebook. The plurality of antenna ports comprises a number of antenna ports that is a function of a number of antenna ports in the first dimension, and a number of antenna ports in the second dimension.

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: An exemplary method provides for a user equipment (UE) receiving a first reference signal (RS) that was transmitted by a base station using a first transmit beam. The UE performs a first RS measurement with respect to the received first RS, producing a first measurement result. The UE receives a second RS that was transmitted by the base station using the first transmit beam. The UE performs a second RS measurement with respect to the received second RS, producing a second measurement result. The UE determines that a condition is satisfied based on determining that the base station has transmitted to the UE a measurement result filtering indicator indicating that the UE may filter its first and second measurement results. The UE derives a filtered measurement result based on the first measurement result and the second measurement result, and selects a beam based on the filtered measurement result.

Abstract: A user equipment (UE) (200, 500, 1530) transmits data to a base station (100, 500, 1520) in a wireless communication network. The UE (200, 500, 1530) comprises multiple antenna ports, and selects a precoding matrix from a respective first, second, third, or fourth set of precoding matrices according to a number of spatial layers. The first, second, third, and fourth sets of precoding matrices are available for all coherence capabilities and are comprised within a larger set of precoding matrices. The larger set comprises precoding matrices that are not available for all coherence capabilities. The first, second, third, and fourth sets of precoding matrices correspond to one, two, three, or four spatial layers, respectively. The number of columns in the selected precoding matrix is equal to the number of spatial layers and each column comprises a single non-zero element and one or more zero elements.

Abstract: Embodiments of the disclosed techniques include methods for remote interference management (RIM) implemented in a network device in charge of management in a wireless network. In one embodiment, a method includes receiving messages from a set of base stations, wherein each message from abase station of the set of base stations indicates that the base station is interfered. The method further includes grouping the set of base stations into a set of reference signal groups based on the messages, each reference signal group being mapped to a reference signal group identifier; and the method continues with sending a respectively mapped reference signal group identifier to each of the set of base stations. Embodiments of the invention also include methods to group base stations causing the interference.