Abstract: Systems and methods are disclosed herein for Channel State Information (CSI) feedback for Non-Coherent Joint Transmission (NC-JT). In one embodiment, a method performed by a wireless communication device comprises receiving a CSI report configuration that comprises either: a first group of Non-Zero Power CSI reference signal (NZP CSI-RS) resources for channel measurement and a second group of NZP CSI-RS resources for channel measurement or a list of NZP CSI-RS resource tuples each comprising one or more NZP CSI-RS resources for channel measurement. The method further comprises selecting a first NZP CSI-RS resource and/or a second NZP CSI-RS resources in the first group of NZP CSI-RS resources and/or the second group of NZP CSI-RS resources, respectively, or in a NZP CSI-RS resource tuple in the list of NZP CSI-RS resource tuples. The method further comprises reporting, to a network node, CSI based on the first and/or second NZP CSI-RS resources.

Abstract: Methods for enhancing Physical Uplink Shared Channel (PUSCH) reliability. In embodiments disclosed herein, a base station provides, and a wireless device receives, an instruction for transmitting a plurality of PUSCH repetitions based on two Sounding Reference Signal (SRS) resource sets. Accordingly, the wireless device transmits, and the base station receives, the plurality of PUSCH repetitions based on the instruction. In a non-limiting example, the wireless device can be configured to transmit the multiple PUSCH repetitions in accordance with codebook based PUSCH transmission or non-codebook based PUSCH transmission. As a result, it is possible to efficiently use multiple SRS resource sets for transmission and/or reception of PUSCH repetitions, especially in Frequency Range 2 (FR2) in which an uplink transmit beam may be formed with a narrower beam-width.

Abstract: A method of transmitting an uplink transmission by a wireless device is disclosed. The method comprises a wireless device receiving signaling configuring the wireless device with a plurality of Sounding Reference Signal (SRS) resources. The wireless device subsequently receives an indication, in a physical layer downlink control channel, of a selected plurality of SRS resources selected from among the plurality of configured SRS resources and transmits a plurality of multiple-input multiple-output (MIMO) layers of a PUSCH transmission.

Abstract: There is provided an antenna arrangement for a radio transceiver device for simultaneous use of two polarization directions. The antenna arrangement comprises at least two baseband chains. The antenna arrangement further comprises a first set of antenna elements of a first polarization direction, and a second set of antenna elements of a second polarization direction. The antenna arrangement comprises an analog distribution network operatively connecting the at least two baseband chains to both sets of antenna elements. All of the baseband chains are operatively connected to each respective antenna element of the first set and to each respective antenna element of the second set via the analog distribution network.

Abstract: There is provided mechanisms for transmission of reference signal resources from a terminal device. A method is performed by the terminal device. The terminal device comprises at least two antenna panels and a baseband chain operable to be switched between the at least two antenna panels. The baseband chain is thereby connected to each of the antenna panels one at a time. The method comprises distributing a fixed set of reference signal resources among the at least two antenna panels by selecting which beams are to be used for transmission of the reference signal resources. The reference signal resources are distributed among the at least two antenna panels according to antenna panel selection information. The method comprises transmitting each of the reference signal resources in a respective one of the beams as the baseband chain is connected to each antenna panel used for generating the beams.

Abstract: A method (10) for restoring a microwave link is provided. The method (10) is performed by a network entity (7) and comprises receiving (11) information from a node (3) controlling a microwave antenna (5), the information indicating that an obstacle is at least partly obscuring the microwave antenna (5), and instructing (12), based on the received information, an unmanned aerial vehicle (6) adapted for maintenance work to fly to a given location for removing the obstacle on the microwave antenna (5). A method (40) in a network node (3), a method (70) in an unmanned aerial vehicle (6) and devices are also provided.

Abstract: There is provided mechanisms for beam related statistics aided resumed beamformed communication with a terminal device. A method is performed by a radio access network node. The method comprises providing network access to the terminal device by, in a first set of beams, performing beamformed communication with the terminal device until the terminal device leaves radio resource control (RRC) connected mode. The method comprises storing beam related statistics of the beamformed communication. The method comprises providing resumed network access to the terminal device by, in a second set of beams, performing resumed beamformed communication with the terminal device upon the terminal entering RRC connected mode. How to perform the resumed beamformed communication is based on the beam related statistics.

Abstract: There is provided mechanisms for adaptive cell-shaping in a cellular network in which a group of radio access network nodes provide network access. A method is performed by a network node. The method comprises obtaining an indication of combined network performance degradation in a region in which a first radio access network node in the group of radio access network nodes provides network access and increased need for network access for prioritized service and/or prioritized subscribers in this region. The method comprises initiating adjustment of cell-degradation shaping parameters of at least one radio access network node in the group of radio access network nodes. Network access for the prioritized service and/or prioritized subscribers in the region is maintained by this at least one radio access network node in the group of radio access network nodes.

Abstract: There is provided mechanisms for rotational movement triggered candidate beam updating at a terminal device. A method is performed by the terminal device. The method comprises performing beamformed communication, in a first beam having a first pointing direction, with a transmission and reception point. The method comprises detecting that the terminal device is subjected to a rotational movement. The rotational movement causes the first beam to change its pointing direction. The method comprises updating, upon having detected that the terminal device is subjected to the rotational movement, a candidate set of second beams to be used for beam training. The candidate set of second beams, upon having been updated, comprises at least one second beam having a predefined pointing direction.

Abstract: Mechanisms for beam management. An example method, in a network node, comprises transmitting a reference signal so as to enable each of the terminal devices participating in a first part of the beam management procedure to identify in which of a first set of beams the reference signal is received with highest power. The method comprises transmitting the reference signal in a second part of the procedure so as to enable each of the terminal devices to identify in which of a second set of beams the reference signal is received with highest power. The method comprises transmitting the reference signal during a third part of the procedure so as to enable each of the terminal devices to identify in which of a third set of beams the reference signal is received with highest power. There is one third set for each beam in the first set.

Abstract: There is provided mechanisms for estimating angle of arrival of a radio signal in a radio communications network. A method is performed by a receiving radio transceiver device. The method comprises obtaining measurements of the radio signal as received in two receive beams covering a given angular sector. The two receive beams are created by analog beamforming in an antenna array. The receive beams have different complex beam patterns and at any angle within the given angular sector at most one of the complex beam patterns has gain below a threshold. The method comprises estimating the angle of arrival of the radio signal by comparing a complex amplitude of the measurements in the two receive beams to a discriminator function.

Abstract: There is provided mechanisms for determining beam settings for beam management. A method is performed by a first radio transceiver device. The method comprises obtaining information about expected distribution of second radio transceiver devices in a network coverage region of the first radio transceiver device in which the beam management is to be performed. The method comprises determining beam settings for a first set of beams and a second set of beams. The first set of beams and the second set of beams are to be used for the beam management. There are fewer beams in the first set of beams than in the second set of beams. The beams in the first set of beams collectively cover all beams in the second set of beams. The beam settings for the beams in the first set of beams are determined according to the obtained information.

Abstract: A method for beam management, which method is performed by a network node. The method provides for using a first receive, RX, beam to receive a first signal transmitted by a user equipment, UE. The method then provides for obtaining, based on the first signal received using the first RX beam, a first received signal power value, P1. The method then provides for using a second RX beam to receive the first signal or another signal transmitted by the UE. The method then provides for obtaining, based on the signal received using the second RX beam, a second received signal power value, P2. The method then provides for determining whether P2 exceeds P1 by at least a threshold. The method then provides for determining whether to initiate a beam sweep based on whether or not P2 exceeds P1 by at least the threshold.

Abstract: A mechanisms for beam training. The method includes receiving, using a fixed beam, a first occurrence of a set of beam reference signals. The method includes determining a respective compensation factor for at least one of the received beam reference signals. The method includes receiving, using a set of directional beams, a second occurrence of the set of beam reference signals. The method includes evaluating which directional beam in the set of directional beams to use for subsequent communication with the network node based on strongest received beam reference signal in the second occurrence of the set of beam reference signals as compensated for using the compensation factors.

Abstract: A method of identifying reference signal resources to be used in a transmission by a wireless device is disclosed. The method comprises a wireless device receiving signaling configuring the wireless device with a plurality of reference signal resource groups, each group comprising a plurality of reference signal resources. The wireless device subsequently receives an indication, in a control channel, of a selection of reference signal resources to be used. Each of the plurality of reference signal resources to be used is selected from a different one of the plurality of reference signal resource groups such that reference signal resources belonging to the same reference signal resource group are not selected for simultaneous use. A reference signal is then transmitted to a network node in the network using the indicated selection of reference signal resources.

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: A user equipment (UE) determines a receive (RX) spatial filter for receiving both a first measurement resource and a second measurement resource. The RX spatial filter is determined based on a first spatial quasi-co-located (QCL) reference associated with the first measurement resource and a second spatial QCL reference associated with the second, measurement resource. The UE measures the first and second measurement resources with the determined Rx filter configuration.

Abstract: The invention relates to a wireless communication device 1 having an upper part 10 and a bottom part 11, the upper part 10 comprising one or more transmission antenna device(s) 12a, 12b; 15. The upper part 10 and the bottom part 11 are arranged movably in relation to each other, so that the bottom part 11, in use mode, is closer to the user than the upper part 10. The bottom part 11 comprises one or more reception antenna device(s) 14a, 14b, 14c, 14d.

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.