Abstract: There is provided mechanisms for transmission of single-port reference signal resources. A method is performed by a network node. The method comprises transmitting, as part of performing a beam selection procedure with a user equipment, two single-port reference signal resources. A first of the two single-port reference signal resources is transmitted over a first polarization. A second of the two single-port reference signal resources is transmitted over a second polarization. The two single-port reference signal resources are time-wise overlapping when transmitted.

Abstract: There is provided a method in a wireless device for uplink transmissions associated with a plurality of reference signal (RS) resources that belong to a plurality of resource sets. The method comprises: receiving downlink control information (DCI) indicating an uplink transmission, the DCI further comprising an indication of one or more RS resources from the plurality of RS resources, the one or more RS resources belonging to the plurality of resource sets; and performing the uplink transmission based on the indication of the one or RS resources in the DCI.

Abstract: A method, system and apparatus for separate implicit update of activated transmission configuration indicator (TCI) states for downlink (DL) and uplink (UL) are disclosed. According to one aspect, a method in a wireless device (WD) includes sending a measurement report for at least one reference signal to a network node, the at least one reference signal being related to at least one TCI state, the at least one TCI state being at least one of a DL TCI state and an UL TCI state. The method also includes activating at least one TCI state that is related to the at least one reference signal.

Abstract: A method performed by a wireless device. The wireless device obtains a first indication indicating that non-group based reporting is to be applied to any setting comprising the first indication. The setting indicates how to report, to a respective node, information on one or more respective reference signals to be received from the respective node. The reference signals use one or more respective beams. The wireless device performs measurements on the one or more respective signals. The wireless device then sends, based on the first indication, a non-group based report to a first node, comprising measurements on one or more first respective reference signals received from the first node, and based on the same first indication, another non-group based report to a second node comprising measurements on one or more second respective reference signals received from the second node.

Abstract: Systems and methods of the present disclosure are directed to a method performed by a wireless communication device (WCD). The method includes receiving, from a network node, downlink control information (DCI) that includes information that indicates Transmission Configuration Indicator (TCI) state(s) to be activated at the WCD. The TCI state(s) to be activated at the WCD include downlink TCI state(s), uplink TCI state(s), or both. The method includes updating a list of activated downlink TCI states at the WCD, a list of activated uplink TCI states at the WCD, or both the list of activated downlink TCI states and the list of activated uplink TCI states at the WCD based on the received DCI.

Abstract: The present invention relates to a first network device (20; 51) for transmission of reference signal resources comprising an antenna arrangement (61) having at least two panel (62, 63) configured to generate beams (53) in different directions. The first network device (20; 51) comprises a control circuitry (210) configured to transmit, as part of performing a beam selection procedure with a second network device (30a; 52), a first reference signal resource in one or more beams from a first of the at least two panel, and a second reference signal resource in one or more beams from a second of the at least two panel. The one or more beams from the first of the two panels is different from the one or more beams from the second of the two panels, and the first reference signal resource is time-wise overlapping with the second reference signal resource when transmitted.

Abstract: Embodiments include methods for a user equipment (UE) configured for beam reporting in a wireless network. Such methods include receiving a configuration of at least first and second resource sets. Each resource set includes multiple reference signals associated with corresponding multiple spatial filtering configurations. Such methods include performing measurements on the reference signals of the first and second resource sets and sending, to the wireless network, a beam report including the measurements arranged in at least first and second groups. Each group includes measurements performed on a first reference signal from the first resource set and on a second reference signal from the second resource set. The first and second reference signals are received concurrently by the UE. One measurement included in the first group is expressed as an absolute value, while others in the first group are expressed as differential values relative to the absolute value.

Abstract: The present disclosure relates to methods of controlling sending of reference signals from a wireless communication device to a radio base station, as well as a wireless communication device and a radio base station performing the methods. In an aspect, a method of a radio base station of controlling sending of reference signals from a wireless communication device is provided. The method includes determining, from an estimated characteristic of a communication channel established via each of a plurality of antennas of the wireless communication device, a measure of similarity in the estimated characteristics for at least two of the communication channels; and if the similarity exceeds a similarity threshold value instructing the wireless communication device to send further reference signals only on one of said at least two communication channels during a time period.

Abstract: Some embodiments of this disclosure provide a method performed by one or more transmission points, TRPs, for communicating with a user equipment, UE. In some embodiments, the method includes: using a first transmit, TX, beam to communicate with the UE; receiving, from the UE, information indicating that the UE has determined that the first TX beam has experienced a beam failure; and after the information is received, using a second TX beam to communicate with the UE.

Abstract: Systems and methods for implicitly activating one or more Transmission Configuration Indicator (TCI) states are provided. In some embodiments, a method performed by a wireless communication device for implicit TCI state activation includes sending a measurement report for one or more reference signals to a base station. The one or more reference signals are related to one or more TCI states, respectively. The method further includes activating at least one TCI state from among the one or more TCI states that are related to the one or more reference signals. In this way, the TCI state selection may be expedited and simplified because additional Medium Access Control (MAC) Control Element (CE) activation message may be avoided.

Abstract: There is provided mechanisms for transmission of reference signals. A method is performed by a terminal device. The terminal device comprises at least two physical antenna ports. The method comprises obtaining channel information. The method comprises determining, for at least one given precoder in a codebook, an uplink reference signal to physical antenna port mapping based on the channel information. The method comprises transmitting uplink reference signals in the physical antenna ports according to the determined mapping.

Abstract: There is provided mechanisms for signalling, towards user equipment, a spatial relation between component carriers on which SSBs are to be transmitted. A method is performed by a network node. The method comprises signalling, towards the user equipment is served by the network node, an indication of spatial QCL among the SSBs to be transmitted on different ones of the component carriers. The method comprises initiating transmission of the SSBs on the component carriers.

Abstract: There is provided mechanisms for performing a beam selection process. A method is performed by a network node. The method comprises transmitting reference signals during the beam selection process. The beam selection process involves two consecutive beam sweeps to be performed using a set of direction beams. During each of the two consecutive beam sweeps the reference signals are sequentially transmitted in the set of direction beams as the directional beams are swept. During the two consecutive beam sweeps, the reference signals are in a first subset of the directional beams transmitted with a first polarization, and the reference signals are in a second subset of the directional beams transmitted with a second polarization.

Abstract: A method (200) performed by a UE (102). The method includes receiving (s202) one or more messages for activating at least i) a first set of configured TCI states and ii) a second set of configured TCI states, wherein the first set of activated TCI states is associated with a first PCI and indicates a first set of reference signals, and the second set of activated TCI states is associated with a second PCI and indicates a second set of reference signals. The method also includes performing (s204) beam failure detection, BFD, monitoring. Performing the BFD monitoring comprises: determining (s206) whether a beam failure with respect to the first PCI has occurred based on the first set of reference signals; and determining (s208) whether a beam failure with respect to the second PCI has occurred based on the second set of reference signals.

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: There is provided mechanisms for communication in a wireless access network using a dual polarized antenna array. The antenna array comprises antenna elements of a first polarization and of a second polarization. A method comprises transmitting a first signal via a transmit antenna port in a transmit beam on a first link of the wireless access network. The transmit antenna port is connected to the antenna elements of both the first polarization and the second polarization. The method comprises receiving a second signal on a second link of the wireless access network via a first receive antenna port in a first receive beam and via a second receive antenna port in a second receive beam. The first receive antenna port is connected to antenna elements of the first polarization and the second receive antenna port is connected to antenna elements of the second polarization. The receive beams and the transmit beam fulfil an overlap criterion with respect to their total power patterns.

Abstract: A method, network node and wireless device (WD) for reference signal selection and use at power limitation are disclosed. According to one aspect, a method in a wireless device, WD, configured to communicate with a network node is provided. The method includes determining that a maximum permissible emission event has occurred for a current spatial domain transmission filter of the WD, selecting at least one candidate downlink reference signal and reporting the selected candidate downlink reference signal to the network node.

Abstract: Method and apparatus are disclosed herein for providing Downlink Control Information (DCI)-based Transmission Configuration Indicator (TCI) state update with flexible channel selection. In one embodiment, a method performed by a network node of a cellular communication system comprises transmitting, to a User Equipment (UE), a DCI having a DCI format comprising a TCI state update indication, and a TCI state update application indication indicating one or more channels or signals to which the TCI state update is to be applied by the UE. In another embodiment, a method performed by a UE comprises receiving a DCI having a DCI format comprising a TCI state update indication and a TCI state update application indication indicating one or more channels or signals to which the TCI state update is to be applied by the UE, and applying the TCI state update as indicated by the TCI state update application indication.

Abstract: According to certain embodiments, a method performed by a wireless device comprises determining a configuration for sounding reference signal (SRS) transmission. The configuration is determined at least in part based on information received from a network node. The method further comprises performing the SRS transmission according to the configuration.

Abstract: A method performed by a wireless device of configuring uplink sounding transmissions is provided. The method includes receiving, from a network node, receiving, from a network node, different sets of configuration parameters for sounding signal transmissions for the wireless device. Each of the different sets of configuration parameters includes a time-domain parameter and different frequency allocations. The method further includes receiving, from the network node, downlink control information, DCI, comprising information that indicates which of the configured frequency allocations that should be applied for the SRS transmission. Furthermore, the method includes generating a sounding reference signal based on the received DCI.