Abstract: A method of transmitting demodulation reference signals (DMRS) over one, three or five resource blocks (RBs) with Interleaved Frequency Division Multiple Access (IFDMA) from a wireless device to a wireless network node in a wireless network wherein Single Carrier Frequency Division Multiple Access (SC-OFDMA) is deployed in uplink, is provided. At least one of: a set of base sequences including thirty quadrature phase shifting keying, QPSK, sequences of length 6, 18 or 30 is determined, a demodulation reference signal sequence is derived from the determined set of base sequences, the demodulation reference signal sequence is multiplexed, and the multiplexed demodulation reference signal sequence is transmitted, by the wireless device, to the wireless network node.

Abstract: Systems and methods are disclosed for single Control Resource Set (CORESET) based Physical Downlink Control Channel (PDCCH) diversity over multiple Transmission/Reception Points (TRPs). In one embodiment, a method performed by a wireless communication device comprises receiving a message(s) that activates first and second TCI states for a CORESET comprising first and second sets of resource elements (REs) associated to the first and second TCI states, respectively, and receiving a configuration of PDCCH candidates comprising PDCCH candidates for each of one or more aggregation levels (ALs) in a search space (SS) set. Each PDCCH candidate comprises REs in the first and second sets of REs. The method further comprises receiving a Downlink Control Information (DCI) carried by: (a) a single PDCCH in one PDCCH candidate or (b) first and second repetitions of a PDCCH in the first and second set of REs, respectively.

Abstract: According to some embodiments, a method for use in a network node of transmitting channel slate information reference signals (CSI-RS) comprises: transmitting, to the wireless device, an indication of the subset of PRBs that the wireless device should use to measure CSI-RS; and transmitting CSI-RS on the indicated subset of PRBs. According to some embodiments, a method for use in a wireless device of receiving CSI-RS comprises: receiving an indication of a subset of PRBs that the wireless device should use to measure CSI-RS associated with an antenna port; and receiving CSI-RS on the indicated subset of PRBs. In some embodiments, the indication of the subset of PRBs that the wireless device should use to measure CSI-RS comprises a density value and a comb offset.

Abstract: Systems and methods are disclosed for random access in a wireless communication system such as, e.g., a wireless communication system having a non-terrestrial (e.g., satellite-based) radio access network. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device for random access comprises performing an open-loop timing advance estimation procedure to thereby determine an open-loop timing advance estimate for an uplink between the wireless device and a base station. The method further comprises transmitting a random access preamble using the open-loop timing advance estimate. In this manner, random access can be performed even in the presence of a long propagation delay such as that present in a satellite-based radio access network. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

Abstract: Systems and methods for determining Transmission Configuration Indication (TCI) states for Aperiodic (AP) Channel State Information Reference Signals (CSI-RSs) overlapping with downlink transmissions are provided. In some embodiments, a method performed by a wireless device includes: receiving AP CSI-RSs in the same symbols as downlink transmissions scheduled by a DCI with two TCI states indicated in DCI; receiving triggering of the one or more AP CSI-RS with scheduling offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the AP CSI-RS resources, where the scheduling offset is smaller than a wireless device reported threshold; and determining that the downlink transmission is scheduled according to a scheme where different sets of layers of the downlink transmission are received with different TCI states. In some embodiments, the wireless device applies a QCL assumption for a PDSCH transmission occasion when receiving the AP CSI-RS.

Abstract: Systems and methods are disclosed herein that relate to multi-Transmission/Reception Point (TRP) uplink transmission in a cellular communications system. In one embodiment, a method performed by a wireless communication device comprises receiving, from a network node, a configuration of two Sounding Reference Signal (SRS) resource sets, a first and second SRS resource sets, each comprising one or more SRS resources. The method further comprises receiving, from the network node, downlink control information (DCI) that schedules a physical uplink channel transmission comprising a first part associated to a first SRS resource in the first SRS resource set and a second part associated to a second SRS resource in the second SRS resource set, wherein the first and second SRS resources are indicated in the DCI. The method further comprises transmitting the physical uplink channel transmission in accordance with the DCI.

Abstract: A user equipment detects that an aggregate of calculated uplink transmit power of the UE exceeds a threshold. In response to the detecting, a power of at least one of a plurality of frequency-division multiplexing (FDM)-based uplink transmissions of the UE over corresponding wireless connections with respective wireless access network nodes is adjusted.

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 are disclosed herein for improving the reliability of a physical downlink control channel (PDCCH) transmission and reception. In one embodiment, a method performed by a wireless communication device for reception of PDCCH repetitions over multiple control resource sets (CORESETs) in a cellular communications system comprises receiving a configuration of a first CORESET and a second CORESET. The method further comprises receiving, from one or more network nodes, a first repetition of a PDCCH carrying downlink control information (DCI) in the first CORESET and a second repetition of the PDCCH carrying the same DCI in the second CORESET, wherein the first and second repetitions of the PDCCH have either: (a) different channel encoding or (b) a same channel encoding. The method further comprises decoding the DCI based on the first repetition of the PDCCH and/or the second repetition of the PDCCH.

Abstract: A method for a UE in a multiple transmission points communication system, mTRP, scheme, is provided. The method includes receiving downlink control information, DCI, indicating at least two transmission points scheme for a scheduled data transmission on physical resource blocks, PRBs. The PRBs includes at least a first subsets of PRBs, associated with a first transmission point, and a second subset of PRBs, associated with a second transmission point. The method further includes determining a first PT-RS frequency density for the first set of PRBs based on the number of PRBs in the first set of PRBs and a second PT-RS frequency density based on the number of PRBs in the second set of PRBs. A UE, methods for a base station and a base station are also provided.

Abstract: A method (800) performed by a base station (e.g., gNB). The method includes selecting (s802) a set of frequency domain (FD) basis vectors. The method also includes transmitting (s804) to a UE information identifying the selected FD basis vectors.

Abstract: Systems and methods for mixed signal Downlink Control Information (DCI) and multi-DCI for Physical Downlink Shared Channel (PDSCH) scheduling are disclosed. In one embodiment, a method performed by a User Equipment (UE) comprises receiving a configuration of first and second sets of Control Resource Sets (CORESETs), and a list of Transmission Configuration Indication (TCI) states for PDSCH. The method further comprises receiving first and second TCI activation commands associated to the respective sets of CORESETs. The method further comprises receiving first and second Physical Downlink Control Channels (PDCCHs) carrying first and second DCIs in first and second CORESETs from among the first and second sets of CORESETs, respectively, and receiving a first PDSCH(s) scheduled by the first DCI and a second PDSCH(s) scheduled by the second DCI, wherein the first and/or second DCI comprises a TCI codepoint that is mapped to two of the respective activated TCI states.

Abstract: Systems and methods for determining Transmission Configuration Indication (TCI) states for multiple transmission occasions are provided. In some embodiments, a method performed by a wireless device includes: receiving a configuration including: a list of TCI states; a TCI activation command in activating a subset of the TCI states and mapping between each of the codepoints to activated TCI states; and a time threshold; receiving in a slot a scheduling message scheduling the transmission occasions; determining time offsets between receiving the scheduling message and each transmission occasion; determining a TCI state for each transmission occasion if at least one time offset is less than the time threshold; and receiving the transmission occasions with the determined TCI states. The proposed solutions ensure consistent UE behavior and allow for more robust PDSCH transmission over multiple TRPs.

Abstract: A method, system and apparatus are disclosed. According to one aspect of the disclosure, a network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to: cause a first physical downlink control channel, PDCCH, transmission starting at a first symbol and cause a second PDCCH transmission starting at a second symbol where the first PDCCH transmission is configured to schedule a first physical uplink shared channel, PUSCH, transmission ending at a third symbol for a transport block and the second PDCCH transmission configured to schedule a second PUSCH transmission starting at a fourth symbol for the transport block, where the second symbol occurs before the third symbol, the third symbol occurs later in time than the first symbol and the fourth symbol occurs later in time than that second symbol.

Abstract: Systems and methods for multiple Downlink Control Information (DCI) based Physical Downlink Shared Channel (PDSCH) scheduling are disclosed herein. In one embodiment, a method performed by a User Equipment (UE) comprises receiving first and second Physical Downlink Control Channels (PDCCHs) carrying first and second DCIs in first and second Control Resource Sets (CORESETs) in first and second time periods (t1, t2), respectively, wherein t1?t2. The method further comprises receiving first and second PDSCHs scheduled by the first and second DCIs in third and fourth time periods (t3, t4), respectively, wherein the first and second PDSCHs are associated with a same Hybrid Automatic Repeat Request (HARQ) process and a same Transport Block (TB), and t3?t4. The method further comprises sending first and second HARQ ACK/NACKs in first and second Physical Uplink Control Channel (PUCCH) resources in fifth and sixth time periods (t5, t6), respectively, wherein t5?t6 and t4?t5.

Abstract: Physical Uplink Shared Channel (PUSCH) resource allocation with multiple TRPs is provided. Embodiments described herein provide details to facilitate multi-Transmission/Reception Point (TRP) transmission on the PUSCH with respect to User Equipment (UE) implementation and application scenarios. A gap between consecutive PUSCH transmission instances toward different TRPs (e.g., transmission associated with different spatial transmission filters) can be signaled, either semi-statically or dynamically. In case of dynamic signaling, the gap may be configured in a Time Domain Resource Allocation (TDRA) table and indicated in Downlink Control Information (DCI). In case of semi-static signaling, it may be done by Radio Resource Control (RRC).

Abstract: Systems and methods for low complexity multi-configuration Channel State Information (CSI) reporting are provided. In some embodiments, a method of operating a wireless device in a cellular communications network to provide CSI feedback from multiple CSI reporting configurations is provided. The method includes receiving a first and second CSI reporting configuration and then reporting updated CSI in a CSI report for only one of the first CSI reporting configuration and the second CSI reporting configuration. In this way, rich CSI feedback with many ports, different codebooks, mixed beamformed and non-precoded CSI-RS configurations, etc., can be supported while requiring less computational complexity in the wireless device.

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: Systems and methods of PUCCH reliability are provided. In some embodiments, a method performed by a wireless device includes: receiving an activation command to activate a first and a second spatial relation; optionally determining the first and the second spatial relation based on one or more Downlink TCI states; transmitting the UCI according to the first spatial relation in a first set of symbols or slots; and transmitting the UCI according to the second spatial relation in a second set of symbols or slots. In this way, fewer changes to the specifications are required. The existing RRC configuration for spatial relations and MAC CE activation might be used. Spatial relations might be selected by the MAC CE. Also, the existing DCI can be used where a PUCCH resource is selected by PRI bits. Since MAC CE is used to select spatial relations, different combinations can be selected dynamically.

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.