Abstract: According to certain embodiments, a method in a network node, is disclosed. The method comprises selecting a sub set from a predetermined set of P CSI-RS ports for receiving channel information. The network node comprises an antenna array with controllable polarization. Each CSI-RS port corresponds to a combination of a set of resource elements and an antenna port of said antenna array. The predetermined set comprises a first number P1 of CSI-RS ports with a first polarization state and a second number P2 of CSI-RS ports with a second polarization state. The first and second polarization states are distinct. The method further comprises populating the subset with Q CSI-RS pons in such mariner that the ratio of CSI-RS pons respectively having the first and second polarization states is equal to the ratio of the first and second numbers.

Abstract: Systems and methods for early Channel State Information (CSI) feedback in New Radio (NR) are provided. In embodiments of the disclosure, CSI reporting is performed during a random access procedure to provide early CSI feedback and enable more efficient data transmission with higher spectral efficiency in earlier communications. In some examples, CSI reporting can be reported on Message 3 of the random access procedure after measuring channel and/or interference on a CSI Reference Signal (RS) (CSI-RS) during the random access procedure. The proposed solution allows early CSI to be triggered when a User Equipment (UE) performs initial access to a serving cell. With the early CSI acquired, the network can perform proper link adaptation including Multiple Input Multiple Output (MIMO) precoding, and ensure efficient data transmission without having to wait until connection setup and configuration of the CSI framework is established.

Abstract: A network node, wireless device, base station, user equipment and corresponding methods are provided. The network node includes processing circuitry configured to: select a first set and second set of reference signal resources in a subframe and aggregate the first set and second set of reference signal resources in the subframe to form a code division multiplexing, CDM, aggregation configuration. The first set and second set of reference signal resources in the subframe satisfy a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols. The first set and second set of reference signal resources in the subframe satisfy a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.

Abstract: Systems and methods are disclosed herein for updating an active Transmission Configuration Indication (TCI) state for single- or multi-Physical Downlink Control Channel (PDCCH) based multi-Transmission/Reception Point (TRP) Physical Downlink Shared Channel (PDSCH) transmissions. In one embodiment, a method performed by a wireless communication device comprises receiving a Medium Access Control (MAC) Control Element (CE) comprising information that activates one or more TCI states for a particular serving cell and/or bandwidth part (BWP) of the wireless communication device that is configured for multi-PDCCH based multi-PDSCH transmission and maps at most one of the activated TCI states to each codepoint for a Downlink Control information (DCI) TCI field. The method further comprises receiving a PDCCH comprising a DCI in which the DCI TCI is set to a particular codepoint and determining the activated TCI state used for a PDSCH scheduled by the DCI based on the information comprised in the DCI.

Abstract: There is disclosed a method for operating a wireless device in a wireless network, wherein the wireless device is configured, by higher layer signaling, with a first measurement restriction (MR) configuration for measuring and reporting Channel State Information (CSI) the method comprises transmitting a first indication with lower layer signaling, indicating that a second MR configuration for measuring and reporting CSI, replaces the first MR configuration for measuring and reporting CSI.

Abstract: A method of operating a wireless device in a communication network is described. The method includes obtaining a list of time domain resource allocations, TDRAs, from a network node of the communication network. The method also includes receiving downlink control information, DCI, scheduling a physical downlink shared channel, PDSCH, for reception by the wireless device and selecting a TDRA from the list of TDRAs based on the received DCI. The method further includes determining a PDSCH transmission scheme including one or more transmission points, TRPs, based on a number of PDSCH transmission repetitions configured for the selected TDRA.

Abstract: In one aspect, a method performed by a wireless device for obtaining information about Physical Uplink Control Channel (PUCCH) resources is provided. The method includes receiving a Medium Access Control (MAC) Control Element (CE) from a network, wherein the MAC CE contains respective spatial relation information relating to PUCCH resources configured for at least one specific bandwidth part. In a further aspect, a wireless device for obtaining information about PUCCH resources is provided. The wireless device includes power supply circuitry configured to supply power to the wireless device and processing circuitry configured to cause the wireless device to receive a MAC CE from a network, wherein the MAC CE contains respective spatial relation information relating to PUCCH resources configured for at least one specific bandwidth part.

Abstract: Systems and methods for Phase Tracking Reference Signal (PTRS) to Demodulation Reference Signal (DMRS) association when two or more Transmission Configuration Indication (TCI) states are indicated for a Physical Downlink Shared Channel (PDSCH) transmission in a cellular communications system are disclosed. In one embodiment, a method performed by a WCD comprises receiving a Physical Downlink Control Channel (PDCCH) comprising Downlink Control Information (DCI) that indicates two Transmission Configuration Indication (TCI) states for a PDSCH transmission to the WCD and DMRS ports within a single Code Division Multiplexing (CDM) group. The method further comprises determining a PTRS port to DMRS port association for the PDSCH transmission, wherein a single PTRS port is used for the PDSCH transmission and determining the PTRS port to DMRS port association comprises determining that the single PTRS port is associated with a lowest indexed DMRS port in the DMRS ports indicated in the DCI.

Abstract: Techniques are provided to control the activation of resource sets via medium access control (MAC) signaling. In some aspect, a radio network node generates a MAC message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location (QCL) information. The radio network node then transmits the MAC message to a wireless device.

Abstract: Systems and methods are disclosed for dynamic Hybrid Automatic Repeat Request (HARQ) codebook construction with enabling or disabling of HARQ Acknowledgment (HARQ-ACK) feedback per HARQ process. In one embodiment, a method performed by a wireless communication device comprises receiving, from a network node, information that configures the wireless communication device with a first set of HARQ processes for which HARQ-ACK feedback is disabled and a second set of HARQ processes for which HARQ-ACK feedback is enabled. The method further comprises receiving first downlink control information that schedules a first downlink shared channel transmission and determining that the transmission corresponds to one of the first set of HARQ processes for which HARQ-ACK feedback is disabled. The method further comprises, upon making this determination, performing a first set of actions for HARQ-ACK feedback generation for HARQ processes with HARQ-ACK feedback disabled.

Abstract: Systems and methods of reference resource determination are provided. A method performed by a wireless device for determining a reference resource includes: receiving an indication of at least one configurable offset value; receiving one or more configurations of resources for channel measurement and one or more configurations of measurement reporting; and determining a reference resource for a measurement report to be reported in slot n? using the at least one configurable offset received from the network node. In some embodiments, this includes configurations of Channel State Information Reference Signals (CSI-RS) resources for channel measurement and/or CSI reporting. In this way, CSI reporting with proper CSI reference resource determination is enabled. In some embodiments, this is suitable for Non-Terrestrial Network (NTN) scenarios where the RTT can be in the order of 10s to 100s of milliseconds.

Abstract: System and method for flexible channel state information-reference signal transmission A method by a wireless device is provided for restricting channel state information (CSI) measurement. The method includes receiving, from a network node, information identifying a first subset of channel state information-reference signal (CSI-RS) resources to be used in performing CSI measurements. The first subset of CSI-RS resources are associated with a first portion of a frequency band that is less than all of the frequency band. CSI measurements are performed in the first subset of CSI-RS resources that are associated with the first portion of the frequency band.

Abstract: Systems and methods for flexible triggering of Channel State Information (CSI) reports are provided. A method performed by a wireless device for transmitting a CSI report according to a timeline requirement includes one or more of: determining to enable timeline switching; receiving an instruction to determine a first CSI report; determining to stop determining an existing ongoing second CSI report; determining the first CSI report; and transmitting the first CSI report. In this way, some embodiments allow ultra-low latency CSI reporting also for the cases when the wireless device is already in the ongoing process of determining a CSI report. In some embodiments, Ultra-Reliable Low-Latency Communication (URLLC) CSI reports are allowed to “override” previous CSI calculations. Some embodiments achieve more flexible triggering of URLLC CSI reports so that the ultra-low latency CSI timeline can be applied for more cases, reducing the CSI latency and resulting in more reliable URLLC scheduling.

Abstract: A method for facilitating Physical Downlink Shared Channel, PDSCH, rate matching is presented. The method is performed in a network node (2) and comprises sending (102) to a wireless device (1) an indication whether a group of all available resources of an aperiodic Channel State Information Reference Signal, CSI-RS, resource pool is used in a given subframe, wherein the sending (102) comprises transmitting, to a wireless device in transmission mode 9, a Downlink Control Information, DCI, format 2C message, in values of two additional bits representing a determined use of CSI-RS resources.

Abstract: Embodiments include methods for operating a user equipment (UE) in a non-terrestrial network (NTN) that utilizes one or more polarization modes for serving one or more cells. Such methods include sending, to a network node, an indication of one or more polarization capabilities of the UE. Such methods also include transmitting and/or receiving one or more signals or channels in a first cell of the NTN according to the indicated polarization capabilities of the UE. In some embodiments, the indicated polarization capabilities of the UE include: a UE type; one or more polarization modes supported by the UE; a polarization correspondence between uplink and downlink signals that is supported by the UE; and/or a list of antenna panels supported by the UE and polarization modes supported by the antenna panels. Other embodiments include complementary methods for operating network nodes, and UEs and network nodes configured to perform such methods.

Abstract: Systems and methods for determining Transport Block Size (TBS) are provided. In some embodiments, a method performed by a wireless device for determining (TBS) includes: receiving an indication of the type of Frequency Domain Multiplexing (FDM) scheme from a base station; and applying different rules to determine TBS depending on which type of FDM scheme was indicated. In this way, different rules of how to determine TBS are provided when both flavors (i.e., single codeword-single Redundancy Version (RV) scheme, and multiple codewords-multiple RVs scheme) of FDM schemes are supported by NR Rel-16.

Abstract: Systems and methods for multi-beam Channel State Information (CSI) reporting are provided. In some embodiments, a method of operation of a second node connected to a first node in a wireless communication network for reporting multi-beam CSI includes reporting a rank indicator and a beam count indicator in a first transmission to the first node. The method also includes reporting a cophasing indicator in a second transmission to the first node. The cophasing indicator identifies a selected entry of a codebook of cophasing coefficients where the number of bits in the cophasing indicator is identified by at least one of the beam count indicator and the rank indicator. In this way, feedback for both a rank indicator and a beam count indicator may be possible which may allow robust feedback and variably sized cophasing and beam index indicators.

Abstract: Systems and methods are disclosed herein for determining and indicating antenna ports in Downlink Control Information (DCI). In one embodiment, a method performed by a wireless communication device comprises receiving a configuration comprising a Demodulation Reference Signal (DMRS) configuration and an antenna port field configuration for an antenna port field in a Downlink Control Information (DCI) format. The method further comprises receiving a DCI of the DCI format and determining a size of an antenna port field and a DMRS port table for interpreting a value comprised in the antenna port field based on the DMRS and antenna port field configurations, the determined DMRS port table being a subset of a master DMRS port table. The method further comprises determining a DMRS port(s) used for a corresponding physical channel based on the size of the antenna port field, the DMRS port table, and/or the value of the antenna port field.

Abstract: User equipment, base station and methods are provided for user equipment uplink data transmission to a base station. In one embodiment, the user equipment includes receiving circuitry configured to receive signaling information in an uplink data grant about unavailable resource elements in a uplink subframe for uplink data transmission over a Physical Uplink Shared Channel (PUSCH) indicated by the data grant and processing circuitry configured to transmit the PUSCH on only available resource elements in the subframe.

Abstract: Systems and methods for New Radio (NR) User Equipment (UE) use of Long Term Evolution (LTE) reference signals are provided. In some embodiments, a method performed by a NR wireless device for increasing throughput includes: receiving a configuration for at least one LTE reference signal; and using the at least one LTE reference signal. In this way, the need to configure additional NR reference signals can be reduced. As a result, the reference signal overhead for an NR UE in a Dynamic Spectrum Sharing (DSS) deployment can be reduced. In addition to rate matching Physical Downlink Shared Channel (PDSCH) around the LTE reference signals, the LTE reference signals can be used for one or more of: Channel State Information (CSI) measurement and feedback; time and frequency synchronization/tracking; and configuring the LTE reference signal as a Quasi-Co-Location (QCL) source in a Transmission Configuration Indicator (TCI) state for the NR UE.