Abstract: A method by a wireless device includes receiving, from a network node, data associated with the airborne or spaceborne system. The data includes satellite ephemeris data and a validity duration for the ephemeris data.

Abstract: A network function unit (e.g., an Integrated Access and Backhaul-donor node Central Unit, IAB-donor-CU 300, an Operations Administration and Maintenance node, OAM node, or a parent node 200) configures space-domain resources in an IAB-node 100 (e.g., an IAB-Distribution Unit DU 110) with different resource sets. Each resource set may restrict certain behavior (e.g., the operation of the access unit) of the IAB-node in terms of transmission and/or reception in a certain spatial radio resource, e.g., the one or more direction units (e.g., a radio beam).

Abstract: A beamforming selection method of a first wireless communication node is disclosed. The method includes receiving first reference signaling, transmitted from a second wireless communication node using a first beamforming setting, generating a first channel estimate based on the first reference signaling, and transmitting, using a second beamforming setting, second reference signaling for reception by the second wireless communication node, wherein each coefficient of the second beamforming setting represents a complex conjugate of a corresponding component of the first channel estimate. In some embodiments, the method further includes iterating the receiving, generating, and transmitting steps until a stopping criterion is met. For example, the stopping criterion may include that a number of iterations performed equals a maximum number of iterations, and/or that a beamforming convergence criterion is met. Corresponding apparatus, wireless communication node and computer program product are also disclosed.

Abstract: A method, system and apparatus are disclosed. According to one or more embodiments, an integrated access and backhaul, IAB, node including an IAB-mobile termination, MT, and an IAB-distributed unit, DU is provided. The IAB node includes processing circuitry configured to determine at least one multiplexing condition associated with a multiplexing capability where the multiplexing capability is associated at least with a capability of performing simultaneous communications by the IAB-MT and IAB-DU, and transmit, to a another IAB node, information associated with the determined at least one dynamic multiplexing condition.

Abstract: The invention refers to a method performed by a wireless device (10), for connecting to a second satellite (20b) in a non-terrestrial network, NTN, wherein the wireless device employs a first beamforming matrix for directing a radio beam from an antenna array of the wireless device to the a first satellite (20a), the method comprising determining an angular difference between the directions towards the first and the second satellite, determining a second beamforming matrix, for communication with the second satellite, based on a direction of the beam towards the first satellite and the determined difference in angles, and using the second beamforming matrix to configure a receiver and/or transmitter for connecting to the second satellite; the invention further refers to corresponding method performed by a network node comprising transmitting to the wireless device ephemeris data of the first and the second satellite order to allow the wireless device determining an angular difference between the directions to

Abstract: Systems and methods are disclosed for Integrated Access and Backhaul (IAB) hierarchical Distributed Unit (DU) resource configuration. In one embodiment, a method performed by an IAB node comprises determining a first multiplexing capability of the IAB node at a first time, sending information that is indicative of the first multiplexing capability of the IAB node to an IAB donor node, and receiving a first resource configuration profile from the IAB donor node. The method further comprises determining a second actual multiplexing capability of the IAB node at a second time that is subsequent to the first time and determining a valid resource configuration for the IAB node based on the second actual multiplexing capability of the IAB node. The method further comprises scheduling transmission on one or more child backhaul links and/or one or more access links of the IAB node based on the valid resource configuration.

Abstract: There is provided a reflection node for handling link failure towards a network node. The reflection node includes a controller for controlling a passive meta-surface having a controllable reflection angle for reflecting radio waves over a communication channel between a network node and a wireless device. The reflection node includes a transceiver unit for receiving instructions from the network node over a control channel. The transceiver unit is configured to determine a link failure event on the control channel between the reflection node and the network node. The controller is configured to, during the link failure event, control the reflection angle of the passive meta-surface using reflection settings specified by configuration data for reflecting the radio waves over the communication channel.

Abstract: A method for targeting an object of point-to-point transmission. The method comprises obtaining an image comprising image data and selecting an area of the image wherein the area comprises image data representing the object to be targeted. The method further comprises steering a transmission beam of an antenna array in a direction corresponding to the selected area in response to the selection and transmitting a signal using the steered transmission beam of the antenna array. Corresponding apparatus and computer program product are also disclosed.

Abstract: A method, system and apparatus are disclosed for power control between integrated access and backhaul (IAB) nodes. In one embodiment, a first node is provided. The first node includes processing circuitry configured to transmit a power control request to a parent, integrated access and backhaul, IAB, node where the power control request is configured to request an adjustment of a transmission power of the parent IAB node, receive a power control response from the parent IAB node, and perform at least one action associated with a second node based at least in part on the power control response.

Abstract: A method and network node having integrated access and backhaul (IAB) functionality are disclosed. According to one aspect, a network node determines information concerning at least one of: (i) an impairment of a first signal from a first integrated access backhaul node that is caused by a second signal from a second IAB node and (ii) an impairment of the second signal that is caused by the first signal. The network node further selects a multiplexing capability for the network node based at least in part on the determined information concerning at least one of the impairments and further multiplexes signals for the first and second IAB nodes using the selected multiplexing capability.

Abstract: Embodiments include methods for an integrated access backhaul (IAB) node configured to communicate with first and second parent nodes in a wireless network. Such methods include determining the IAB node's multiplexing capability between a first parent link with the first parent node and a second parent link with the second parent node, and sending an indication of the multiplexing capability to one or more ancestor nodes in the wireless network. Other embodiments include complementary methods for the first parent node and an IAB donor centralized unit (CU) configured to communicate with the IAB node via at least the first parent node. Other embodiments include IAB nodes and IAB donor CUs configured to perform such methods.

Abstract: A method for adjusting peak-to-average power ratio in a network node when transmitting multiple signals at respective multiple frequency locations is disclosed. The method comprises determining (101) a first signal at a first frequency location being intended for transmission simultaneously as a second signal at a second frequency location, manipulating the first and/or second signals by performing (103) an operation on the first and/or second signals, wherein the operation comprises one or more of: a time shift in a time domain or a frequency domain, and Determining a phase shift in the time domain or the frequency domain, and transmitting (104) the first and signals second signals, as manipulated or non-manipulated, at the first and second frequency locations, respectively. Corresponding computer program product, network node, and wireless communication network are also disclosed.

Abstract: A method, controller and network node for using intelligent surfaces in a wireless communication system are disclosed. According to one aspect, method in a network node configured to communicate with a wireless device (WD), via a reconfigurable reflective surface, the reconfigurable reflective surface being controllable by a controller and being applied to a structure to controllably reflect signals exchanged between the network node and the WD. The method includes determining a configuration of the reconfigurable reflective surface associated with the WD, the determined configuration being associated with a particular reflection coefficient, transmitting to the controller of the reconfigurable reflective surface, an indication of the determined configuration, and receiving signals from the WD at least partially via reflection at the reconfigurable reflective surface.

Abstract: According to certain embodiments, a method performed by a network node comprises transmitting a transmission of system information. The transmission comprises coded bins obtained by reading from a circular buffer. The transmission is transmitted in a first set of subframes corresponding to subframes #4 of a plurality of radio frames. The method further comprises transmitting an additional transmission of the system information. The additional transmission comprises additional coded bits obtained by continuing reading from the circular buffer. The additional transmission is transmitted in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4.

Abstract: A method of over-the-air beamforming calibration is disclosed for a multi-antenna transceiver having a first plurality of antenna elements connected to respective transceiver chains. Beamforming calibration comprises determining respective beamforming calibration factors for the transceiver chains of the antenna elements of the first plurality. The method comprises determining a second plurality of measurement resources for calibration sounding, wherein the second plurality is smaller than the first plurality. The method also comprises (for each measurement resource of the second plurality) selecting one or more antenna elements of the first plurality for sounding signal transmission, wherein each antenna element of the first plurality is selected for one or more of the measurement resources of the second plurality. The method also comprises (using each measurement resource of the second plurality) overlappingly transmitting respective sounding signals by the selected one or more antenna elements.

Abstract: Systems and methods are disclosed herein for frequency domain resource configuration in an Integrated Access and Backhaul (IAB) node. In one embodiment, a method performed by an IAB node configured to operate in a spectrum band comprises receiving a configuration message(s) related to the spectrum band comprising information that defines two or more modes of operation of a distributed unit (DU) of the IAB node that are allowed for two or more subsets of a plurality of subcarriers within the spectrum band of the IAB node, respectively. The method further comprises allocating at least one of the subsets of the plurality of subcarriers within the spectrum band for performing an operation based on a mode of operation of the IAB node and the information comprised in the configuration message(s) and performing the operation on the allocated at least one of the subsets of the plurality of subcarriers.

Abstract: According to certain embodiments, a method performed by a wireless device comprises receiving Assisted-Global Navigation Satellite System (A-GNSS) information in system information broadcast by a network, receiving signals from a set of GNSS satellites (the set of GNSS satellites comprises at least three GNSS satellites), and determining a location of the wireless device using the A-GNSS information and information received in the signals from the set of GNSS satellites. The method further comprises determining Doppler time and frequency offsets compared to a network satellite. The Doppler time and frequency offsets are determined based on the location of the wireless device. The method further comprises initiating a connection process with the network satellite by transmitting a random access signal with pre-compensated time and frequency, the pre-compensated time and frequency based on the determined Doppler time and frequency offsets.

Abstract: A method, system and apparatus are disclosed for aligning Distributed Unit/Mobile Termination (DU/MT) transmission timing. In one embodiment, a method in a network node includes adjusting a first transmission timing to align with a second transmission timing, the first transmission timing comprising one of a Distributed Unit, DU, and a Mobile Terminated Unit, MT, transmission timing at the network node and the second transmission timing comprising another one of the DU and the MT transmission timing at the network node. In another embodiment, a method in a network node includes receiving an MT transmission based at least in part on an adjustment of a first transmission timing to align with a second transmission timing.

Abstract: Systems and methods are disclosed herein for supporting coherent transmissions in a wireless network such as a Non-Terrestrial Network (NTN). In one embodiment, a method performed by a wireless communication device comprises starting an uplink transmission and performing one or more actions comprising creating a time gap within the uplink transmission and/or muting a portion of the uplink transmission to support a timing advance of the continued uplink transmission. The method further comprises performing time-frequency compensation during a time period created by performing the one or more actions and continuing the uplink transmission after performing the time-frequency compensation. In this manner, a low-complexity method for achieving a compensation for a time variant Doppler shift is provided. This offers a predictability that can be used in a wireless network such as, for example, an NTN for supporting coherent demodulation and optimized receiver implementations.

Abstract: A network node is arranged to operate in a cell of a cellular communication system. The network node comprises an interface towards the cellular communication system where the interface is arranged to receive paging information for an idle user equipment, UE, a paging handler arranged to determine a mode of power saving for the UE, and to determine timing for a wake-up signal based on the determined mode and the received paging information, and a transmitter arranged to transmit the wake-up signal at the determined timing. A method of the network node comprises receiving paging information for an idle user equipment, UE, from the cellular communication system, determining a mode of power saving for the UE, determining timing for a wake-up signal based on the determined mode and the received paging information, and transmitting the wake-up signal at the determined timing.