Abstract: Systems and methods for multi-Transmission Reception Point (TRP) transmission for downlink Semi-Persistent Scheduling (SPS) are provided. In some embodiments, a method performed by a wireless device for configuring one or more wireless communications settings includes determining multiple wireless communications configurations; and simultaneously activating at least two of the wireless communications configurations such that the at least two of the plurality of wireless communications configurations include configuration of one or more of a low latency and/or reliability scheme and one or more properties related to the low latency and/or reliability scheme. This enables multi-TRP based reliability schemes for the case when multiple downlink SPS configurations can be simultaneously activated.

Abstract: A method and apparatus are disclosed for rate matching. In one embodiment, a user equipment is configured to receive at least two physical downlink shared channels, PDSCHs; a first PDSCH of the at least two PDSCHs being associated with a first set of cell-specific reference signal, CRS, patterns and a second PDSCH of the at least two PDSCHs being associated with a second set of CRS patterns; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns. In another embodiment, a network node is configured to transmit the at least one PDSCH of at the least two PDSCHs; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns.

Abstract: Network nodes, wireless devices and methods of reducing signaling overhead are provided. In one embodiment, a method includes transmitting to the wireless device at least one power threshold parameter to be used by the wireless device to determine a number of beams to be included in a multi-beam precoder codebook and transmitting to the wireless device a signal to interference plus noise ratio (SINR) to be used by the wireless device to determine to use one of a single beam precoder and a multiple beam precoder.

Abstract: There is disclosed a method of operating a receiving radio node in a wireless communication network. The method includes receiving signaling based on evaluating Phase Tracking Reference Signaling, PTRS, associated to the signaling, wherein evaluating is based on assuming a power level of PTRS relative to associated data signaling based on the number or PTRS ports and/or transmission sources for the signaling indicated to the receiving radio node. The disclosure also pertains to related devices and methods.

Abstract: Systems and methods are disclosed herein for providing aperiodic Sounding Reference Signal (SRS) triggering in a wireless system. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method in a wireless device for triggering aperiodic SRS comprises receiving a first SRS configuration for a first type of aperiodic SRS transmission and a second SRS configuration for a second type of aperiodic SRS transmission. The method further comprises receiving downlink control information comprising a parameter for triggering an aperiodic SRS transmission and determining whether to use the first SRS configuration or the second SRS configuration. The method further comprises transmitting an aperiodic SRS transmission in accordance with the determined SRS configuration. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

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: Embodiments include methods for a wireless device. Such methods can include receiving, from a network node in a wireless network, control signaling that indicates a parameter configuration for data transmissions, by the network node or by the wireless device, that are associated with a subset of a plurality of hybrid ARQ, HARQ, processes. The indicated parameter configuration can be one of a plurality of parameter configurations corresponding to a respective plurality of different subsets of the HARQ processes. The different subsets can include a first subset of one or more HARQ processes for which HARQ feedback is disabled, and a second subset of one or more HARQ processes for which HARQ feedback is enabled. Other embodiments include complementary methods for a network node in a wireless network, and wireless devices and network nodes configured to perform the respective methods.

Abstract: A method, in a radio network node, comprises identifying, among a predetermined codebook of precoding matrix codewords, a subset of precoding matrix codewords that are not to be reported by the wireless device in channel-state-information, CSI, feedback, and transmitting, to the wireless device, a bitmap identifying the subset of precoding matrix codewords that are not to be reported by the wireless device; where each bit in the bitmap corresponds to only one combination of a first dimension index l?1 and a second dimension index l?2 out of the possible combinations of the first dimension index l?1 and the second dimension index l?2, and where the first dimension index l?1 and the second dimension index l?2 identify a two-dimensional beam, the two-dimensional beam being defined by a vector of complex numbers comprised within at least one column of a precoding matrix codeword in the codebook.

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 for constructing a Hybrid Automatic Repeat Request (HARQ) codebook are provided. In some embodiments, a method performed by a User Equipment (UE) includes constructing a dynamic HARQ codebook with a first set of HARQ ACK bits being associated with dynamically scheduled Physical Downlink Shared Channels (PDSCHs) and a second set of HARQ ACK bits being associated with Semi-Persistent Scheduling (SPS) PDSCHs; and ordering the second set of HARQ ACK bits according to the SPS PDSCH index. In some embodiments, the UE receives, from a network node, a plurality of downlink SPS PDSCHs, each with a SPS configuration index and the UE sends, to the network node, HARQ ACK feedback associated with the SPS PDSCHs. In this way, HARQ ACK feedback is enabled for multiple DL SPS configured for a UE with possibly overlapping time domain resource allocations.

Abstract: Systems and methods for activating a Semi-Persistent (SP) Zero Power (ZP) Channel State Information Reference Signal (CSI-RS) are provided. In some embodiments, a method performed by a wireless device includes for activating SP ZP CSI-RS includes receiving, from a network node, a control message that indicates the activation of one or more SP ZP CSI-RS resources; and activating, based on the control message, the one or more SP ZP CSI-RS resources. In this way, ZP CSI-RS may be used for rate matching around other wireless devices and a SP ZP CSI-RS resource may be activated without activating any Non-Zero Power (NZP) CSI-RS, CSI-Interference Measurement (CSI-IM), or CSI reporting for the wireless device.

Abstract: Systems and methods for joint Hybrid Automatic Repeat Request (HARQ) feedback for Physical Downlink Shared Channel (PDSCH) transmission over multiple TRPs are provided. In some embodiments, a method performed by a wireless device for enabling transmission feedback includes: receiving a first Transport Block (TB) and a second TB; and determining the first TB and the second TB based on a Control Resource Set (CORESET) group identifier of a CORESET over which a corresponding Downlink Control Information (DCI) scheduling the TB is received. In this way, the New Radio (NR) Rel-15 procedure for type 1 HARQ codebook construction might be reused with the same or minimum increase of HARQ feedback overhead with semi-static HARQ-ACK codebook.

Abstract: Systems and methods for mixed space time and space frequency block coding are provided. In some embodiments, a method of operating a first node in a wireless communication network for providing time and frequency diversity includes precoding modulation symbols intended for a second node according to two antenna ports on which they are to be transmitted. In a first subset of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, mapping the precoded modulation symbols to resource elements starting first with indices corresponds to frequency. In a different subset of OFDM symbols, mapping the precoded modulation symbols to resource elements in any two adjacent OFDM symbols starting first with indices corresponds to time. In this way, transmission efficiency may be increased by not having any resource elements unused. Additional flexibility for precoding may also be provided when there is no symbol pair mapped to resource elements across two resource blocks.

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 for reliable data transmission over multiple Transmission Reception Points (TRPs) are provided. In some embodiments, a method performed by a wireless device includes: receiving first control data on a first control channel from a first TRP; receiving and processing first data from the first TRP based on the first control data; receiving second control data on a second control channel from a second TRP; and receiving and processing second data from the second TRP based on the second control data, wherein the first data and the second data are associated to a same data Transport Block (TB). In this way, link adaptation can be performed according to the channel condition of each TRP and thus better utilization of each TRP link for improved data reliability and system capacity are provided.

Abstract: Dynamic indication of multi-Transmission/Reception Point (TRP) Physical Downlink Shared Channel (PDSCH) transmission is provided. A solution is proposed to use an antenna port field (e.g., a Demodulation Reference Signal (DM-RS) port indication field) in Downlink Control Information (DCI) to jointly indicate both the DM-RS ports and the scheme used for a PDSCH transmission. When more than one Transmission Configuration Indicator (TCI) state is indicated in a DCI, a new DM-RS table is used in which a DM-RS port allocation is also linked to a transmission scheme. The solution enables flexible PDSCH scheduling without introducing additional DCI overhead.

Abstract: A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and/or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission/Reception Points (TRPs).

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: Network nodes, wireless devices and methods of reducing signaling overhead are provided. In one embodiment, a method includes transmitting to the wireless device at least one power threshold parameter to be used by the wireless device to determine a number of beams to be included in a multi-beam precoder codebook and transmitting to the wireless device a signal to interference plus noise ratio (SINR) to be used by the wireless device to determine to use one of a single beam precoder and a multiple beam precoder.

Abstract: A method for repeating a Transport Block (TB) over multiple transmission occasions. The method includes exchanging specific signaling between a wireless device (e.g., a user equipment) and a network node (e.g., a base station) to repeat same or different redundancy versions of the TB in multiple non-overlapping transmission occasions (e.g., mini-slots) corresponding to multiple Transmission Configuration Indication (TCI) states and having different start positions. More specifically, the network node transmits a Time Domain Resource Allocation (TDRA) to indicate the multiple non-overlapping transmission occasions and the wireless device receives the TDRA indicating the multiple non-overlapping transmission occasions. Accordingly, the wireless device can receive repetition of the TB according to the TDRA.