Abstract: Systems and methods for enabling power control of multiple Transmission Reception Points (TRPs) are provided. In some embodiments, the wireless device performs at least one of: receiving in a Downlink Control Information (DCI) a first Transmit Power Control (TPC) command and a second TPC command and an indication of a first transmission of the physical channel to a first TRP associated with a first closed-loop and a second transmission of the physical channel to a second TRP associated with a second closed-loop; determining a first and a second transmit power based on the first and the second TPC commands, respectively; and applying the first and the second transmit power to the first UL transmission and the second UL transmission, respectively. In this way, some embodiments herein enable more accurate per TRP power control with a simple signaling for multiple UL transmissions towards different TRPs scheduled by a single DCI.

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 activation of two or more Transmission Configuration Indication (TCL) states for a Physical Downlink Control Channel (PDCCH) in one or more Control Resource Sets (CORESETs) in a cellular communications system. In one embodiment, a method performed by a wireless communication device for activation of multiple TCI states for a PDCCH in one or more CORESETs in a cellular communications system comprises receiving, from a network node, signaling that activates NTCI TCI states for one or more CORESETs, wherein NTCI>1. In this manner, activation of two or more TCI states for PDCCH in one or more CORESETs is enabled.

Abstract: Systems and methods related to indicating starting symbols of multiple transmission occasions in a cellular communications system are disclosed. In one embodiment, a method performed by a wireless communication device comprises receiving an indication of transmission occasions for respective downlink transmissions to the wireless communication device, at least two of the downlink transmissions associated to different transmission configuration indication states. The method further comprises receiving an indication of a starting symbol and a length of a first transmission occasion of the transmission occasions and receiving an indication of a particular offset value that is to be applied for determining a starting symbol of a second transmission occasion of the transmission occasions.

Abstract: Systems and methods to support Physical Uplink Shared Channel (PUSCH) multi-Transmission/Reception Point (TRP) scheduling are provided. In some embodiments, the wireless device performs one or more of: obtaining a configuration for Transmission Configuration Indicator (TCI) states for Uplink (UL) PUSCH scheduling; activating/deactivating a subset of configured TCI states). If two TCI states are indicated, the wireless device transmits two different PUSCHs each corresponding to one of the indicated TCI states. If one TCI state is indicated, the wireless device transmits a single PUSCH corresponding to the indicated TCI state. The wireless device maps indicated TCI states to the transmission occasions or actual repetitions is preconfigured via higher layer parameter(s) or is given by a predefined rule.

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 for updating an active Transmission Configuration Indicator (TCI) state for multi-Physical Downlink Control Channel (PDCCH) based Multi-Transmission Reception Point (TRP) are provided. In some embodiments, a method performed by a wireless device for receiving one or more, TCI states includes: receiving a TCI state for at least one Control Resource Set (CORESET) using a control message comprising seven or more bits of TCI State ID field. In this way, the control message can be used to receive additional TCI states. In some embodiments, this allows the physical cell ID to be added to the TCI state.

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: Methods and apparatuses provide a mechanism to account for timing errors of a wireless device (12) in positioning measurements. In one example, a wireless device (12) performs reference-signal transmissions or measurements and sends information to a network node (20) that is involved in positioning of the wireless device (12). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (12). Each timing group represents a related set of transmission or reception timing errors within the wireless device (12). Based on the information, the network node (20) accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device (12).

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: 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 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: Methods for scheduling mixed type traffics via multiple Transmission/Reception Points (TRPs) are provided. In embodiments disclosed herein, a base station provides, and a wireless device receives, a scheduling information for scheduling the mixed type traffics with different Quality of Service (QoS) requirements via multiple TRPs. In a non-limiting example, the mixed type traffics include an enhanced Mobile Broadband (eMBB) service and an Ultra-Reliable and Low Latency Communication (URLLC) traffic service, and the scheduling information can be conveyed in a single Downlink Control Information (DCI) or a pair of DCIs. As such, it is possible to enable efficient scheduling of both eMBB traffic and URLLC traffics simultaneously. As a result, it is possible to satisfy a reliability requirement of the URLLC service without sacrificing spectral efficiency and/or throughput of the eMBB service.

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.