Channel state information reporting for wireless communications

Abstract

Methods and apparatuses for wireless communications networks are presented According to an aspect of some embodiments, there is provided a method performed by a wireless device (300) comprising at least two receive, Rx, port groups, wherein each of said at least two Rx port groups comprises one or more antenna ports for wireless reception at the wireless device. The method comprises receiving (501) from a network node (400), a configuration for a channel state information, CSI, report. The method further comprises determining (502), based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups. The method further comprises generating (503) a CSI report comprising said one or more CSIs, and reporting (504) or transmitting to the network node (400), the CSI report.

Description

[0001] Channel State Information Reporting for Wireless Communications

[0002] TECHNICAL FIELD

[0003] The present disclosure relates to the field of wireless communications, and in particular to methods and apparatuses for Channel State Information (CSI) reporting in a wireless communications network such as advanced 5G networks.

[0004] BACKGROUND

[0005] The radio access technology (RAT) in fifth generation (5G) mobile communications system, also known as 5G new radio (NR), provides a higher level of performance and flexibility than the previous generations of mobile communications systems. 5G mobile communications has been driven by the need to provide ubiquitous connectivity for applications as diverse automotive communication, remote control with feedback, video downloads, as well as data applications for Internet-of-Things (loT) devices, machine type communication (MTC) devices, etc. 5G wireless technology brings several main benefits, such as faster speed, shorter delays and increased connectivity. The third-generation partnership project (3GPP) provides the complete system specification for the 5G network architecture, which includes at least a radio access network (RAN), core transport networks (CN) and service capabilities.

[0006] A wireless device that supports wireless reception with spatially multiplexed streams of data, i.e. , multi-layer reception, is equipped with P > 1 receive, Rx, antenna ports. For the wireless device equipped with P > 1 receive, Rx, antenna ports, there are challenges for channel status information (CSI) reporting and network scheduling due to, for example, the non-coherence of data reception at multiple antenna ports.

[0007] SUMMARY

[0008] The reception at the Rx antenna ports at the wireless device can be either coherent or noncoherent. A wireless device can be understood to have non-coherent or partially coherent reception if a given Rx port cannot receive coherently with at least one other Rx port. Coherent reception across a set of ports can be understood to involve at least one of the following: the ports have common clocks / oscillators or the clocks / oscillators across said ports can be / are synchronized, the frequency and / phase distortions across said ports can be estimated / compensated during a reception across said ports, joint Rx processing or jointly operable RF processing chain(s) across said ports. The wireless reception at the wireless device is non-coherent if any given Rx port cannot receive coherently with any other Rx port. The wireless reception is partially coherent if there exist two or more proper subsets of the P Rx ports, wherein the Rx ports within a subset are coherent, and the Rx ports from a first subset are non-coherent with the Rx ports of a second subset. Such partial coherent data reception leads to challenges for CSI reporting and network scheduling at the wireless device. This invention proposes several methods that address these challenges.

[0009] It is an objective of the embodiments herein to provide methods and apparatuses for CSI feedback reporting for wireless communications networks such as advanced 5G networks. A CSI feedback report may be used interchangeably herein with a CSI report.

[0010] According to an aspect of some embodiments herein, there is provided a method performed by a wireless device comprising at least two receive, Rx, port groups, wherein each of said at least two Rx port groups comprises one or more antenna ports for wireless reception at the wireless device. The method comprises:

[0011] • receiving from a network node, a configuration for a channel state information, CSI, report,

[0012] • determining, based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups,

[0013] • generating a CSI report comprising said one or more CSIs, and

[0014] • reporting or transmitting to the network node, the CSI report.

[0015] According to another aspect of some embodiments herein, there is provided a method performed by a wireless device. The method comprises generating a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device, and reporting or transmitting to a network node the UE capability report.

[0016] According to another aspect of embodiments herein, there is provided a method performed by a network node, for receiving a channel state information, CSI, report from a wireless device comprising at least two receive, Rx, port groups, wherein an Rx port group comprises one or more antenna ports for wireless reception at the wireless device. The method comprises: transmitting, to a wireless device, a configuration for a channel state information, CSI, report, for enabling the wireless device to: o determine, based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups, o generate a CSI report comprising said one or more CSIs, and

[0017] • receiving, from the wireless device, an uplink control information, UCI, including the CSI report over an uplink, UL, channel.

[0018] According to another aspect of embodiments herein, there is provided a method performed by a network node, for receiving, from a wireless device, a UE capability report in a wireless communication system. The method comprises receiving from the wireless device, a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device.

[0019] According to another aspect of embodiments herein, there is also provided a wireless device, comprising a processor and a memory containing instructions executable by said processor, whereby the wireless device is operative to perform any one of the embodiments presented in the detailed description related to the actions or method steps of the wireless device.

[0020] According to another aspect of embodiments herein, there is also provided a network node comprising a processor and a memory containing instructions executable by said processor, whereby the network node is operative to perform any one of the embodiments presented in the detailed description related to the actions or method steps of the network node.

[0021] There is also provided a computer program comprising instructions which when executed on at least one processor of the wireless device, cause the at least said one processor to carry out the actions or method steps presented herein.

[0022] There is also provided a computer program comprising instructions which when executed on at least one processor of the network node, cause the at least said one processor to carry out the actions or method steps presented herein.

[0023] A carrier is also provided containing a computer program as presented in different embodiments, wherein the carrier is one of a computer readable storage medium, an electronic signal, optical signal, or a radio signal.

[0024] In the embodiments described in this disclosure, various methods to support wireless devices with multiple sets of Rx port groups, each comprising one or more antenna ports and each group capable of coherent reception, are provided. The division of receiving ports at the wireless device into Rx port groups is to enable non-coherent / independent reception across different port groups. Some technical advantages of the embodiments in this disclosure are described in the following.

[0025] The first advantage is that the network is enabled to acquire CSI with respect to different Rx port groups at the wireless device based on the device’s reporting of its capability of number of supported Rx port groups or any other related / relevant information. Since each port group is ‘independently’ coherent, CSI acquisition with respect to each of them is a necessity. The second advantage is that the network is enabled to acquire CSI according to different sets of Rx port groups at the wireless device for different types of scheduling - simultaneous scheduling of receptions at multiple Rx port groups or scheduling of reception at only one of the Rx port groups at the wireless device. The interference assumptions used in the computation of CSI determine the type of operation that can be used for scheduling by the network. In addition, the network has the flexibility in scheduling the number of CSIs and the type of CSIs required from the UE. This configuration by the network enables CSI reporting that can obtain CSI for simultaneous reception for multiple Rx port group(s) and / or CSI for operation of only one of the Rx port groups at the wireless device with the selection decision resting either with the network or the wireless device. Such flexibility allows for implementation of varied use-cases of wireless device types and network scheduling.

[0026] By making use of the CSI acquired with respect to various scheduling scenarios, various embodiments presented in the disclosure allow for splitting of DL receptions based on scheduled codewords, DM RS CDM groups and scheduling DCIs across different Rx port groups. This may enable reception at the wireless device with or without explicit indication by the network of the Rx port groups that must be used for reception at the wireless device. The wireless device may determine, based on its own implementation, the Rx port groups to operate with based on specification rules, thereby providing flexibility of implementation. The basis for the above methods is the UE capability report, wherein information related to Rx port groups or some other information from the capability may be used by the network to deduce the number of Rx port groups employed at the UE. Various possibilities of reporting, including both new parameters and reuse / reinterpretation of old parameters are provided in this disclosure, which can help reducing specification effort, network implementation and the UE capability reporting overhead. Additional advantages of the embodiments herein are provided in the detailed description of this disclosure.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Embodiments of the present invention are now described in further detail with reference to the accompanying drawings, in which:

[0029] Fig. 1 shows a schematic representation of a wireless communications system, wherein embodiments herein may be applied;

[0030] Fig. 2 shows a block-based model of a MIMO DL transmission using codebook-based- precoding in accordance with LTE Release 8;

[0031] Fig. 3 is a block diagram depicting a wireless device (for example a UE or an loT device) according to exemplary embodiments herein.

[0032] Fig. 4 is a block diagram depicting a network node (for example a gNB) according to exemplary embodiments herein.

[0033] Fig. 5 illustrates a flowchart of a method performed by a wireless device (for example a UE or an loT device) according to some embodiments herein;

[0034] Fig. 6 illustrates a flowchart of a method performed by a wireless device (for example a UE or an loT device) according to some embodiments herein;

[0035] Fig. 7 illustrates a flowchart of a method performed by a wireless device (for example a UE or an loT device) according to some embodiments herein;

[0036] Fig. 8 illustrates a flowchart of a method performed by a network node according to some embodiments herein;

[0037] Fig. 9 illustrates a flowchart of a method performed by a network node according to some embodiments herein;

[0038] Fig. 10 illustrates a flowchart of a method performed by a network node according to some embodiments herein;

[0039] DETAILED DESCRIPTION

[0040] In the following, a detailed description of the exemplary embodiments is described in conjunction with the drawings, in several scenarios to enable easier understanding of the solution(s) described herein. Figure 1 illustrates a simplified schematic view of an example of a wireless communications network 100 including a core network (CN) 110 and a radio access network (RAN) 120. The RAN 120 is shown including a plurality of network nodes or radio base stations, which in 5G are called gNBs. Three radio base stations are depicted gNB1 , gNB2 and gNB3. Each gNB serves an area called a coverage area or a cell. Figure 1 illustrates 3 cells 121 , 122 and 123, each served by its own gNB, gNB1 , gNB2 and gNB3, respectively. It should be mentioned that the network 100 may include any number of cells and gNBs. The radio base stations, or network nodes serve users within a cell. In 4G or LTE, a radio base station is called an eNB, in 3G or UMTS, a radio base station is called an eNodeB, and BS in other radio access technologies. A user or a user equipment (UE) may be a wireless or a mobile terminal device or a stationary communication device. A mobile terminal device or a UE may also be an loT device, an MTC device, etc. loT devices may include wireless sensors, software, actuators, and computer devices. They can be imbedded into mobile devices, motor vehicle, industrial equipment, environmental sensors, medical devices, aerial vehicles and more, as well as network connectivity that enables these devices to collect and exchange data across an existing network infrastructure.

[0041] Referring back to Figure 1 , each cell is shown including UEs and loT devices. gNB1 in cell 121 serves UE1 121A, UE2 121 B and loT device 121C. Similarly, gNB2 in cell 121 serves UE3 122A, UE4 122B and loT device 122C, and gNB3 in cell 123 serves UE5 123A, UE6 123B and loT device 123C. The network 100 may include any number of UEs and loT devices or any other types of devices. The devices communicate with the serving gNB(s) in the uplink and the gNB(s) communicate with the devices in the downlink. The respective base station gNB1 to gNB3 may be connected to the CN 120, e.g., via the S1 interface, via respective backhaul links 111 , 121 D, 122D, 123D, which are schematically depicted in Fig. 1 by the arrows pointing to “core”. The core network 120 may be connected to one or more external networks, such as the Internet. The gNBs may be connected to each other via the S1 interface or the X2 interface orthe XN interface in 5G, via respective interface links 121 E, 122E and 123E, which is depicted in the figure by the arrows pointing to gNBs.

[0042] For data transmission, a physical resource grid may be used. The physical resource grid may comprise a set of resource elements (REs) to which various physical channels and physical signals are mapped. For example, the physical channels may include the physical downlink, uplink and / or sidelink (SL) shared channels (PDSCH, PUSCH, PSSCH) carrying user specific data, also referred to as downlink, uplink or sidelink payload data, the physical broadcast channel (PBCH) carrying for example a master information block (MIB) and a system information block (SIB), the physical downlink, uplink and / or sidelink control channels (PDCCH, PLICCH, PSCCH) carrying for example the downlink control information (DCI), the uplink control information (UCI) or the sidelink control information (SCI). For the uplink, the physical channels may further include the physical random-access channel (PRACH or RACH) used by UEs for accessing the network once a UE is synchronized and obtains the MIB and SIB. The physical signals may comprise reference signals (RS), synchronization signals (SSs) and the like. The resource grid may comprise a frame or radio frame having a certain duration, like 10 milliseconds, in the time domain and having a given bandwidth in the frequency domain. The radio frame may have a certain number of subframes of a predefined length, e.g., 2 subframes with a length of 1 millisecond. Each subframe may include two slots of a number of OFDM symbols depending on the cyclic prefix (CP) length. IN 5G, each slot consists of 14 OFDM symbols or 12 OFDM symbols based on normal CP and extended CP respectively. A frame may also consist of a smaller number of OFDM symbols, e.g., when utilizing shortened transmission time intervals (TTIs) or a mini-slot / non-slot-based frame structure comprising just a few OFDM symbols. Slot aggregation is supported in 5G NR and hence data transmission can be scheduled to span one or multiple slots. Slot format indication informs a UE whether an OFDM symbol is downlink, uplink or flexible.

[0043] The wireless communication network system may be any single-tone or multicarrier system using frequency-division multiplexing, like the orthogonal frequency-division multiplexing (OFDM) system, the orthogonal frequency-division multiple access (OFDMA) system, or any other Discrete Fourier Transform (DFT) based signal with or without CP, e.g., DFT-spread OFDM (DFT-s-OFDM). Other waveforms, like non-orthogonal waveforms for multiple access, e.g., filter-bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM) or universal filtered multi carrier (UFMC), may also be used. The wireless communication system may operate, e.g., in accordance with the LTE-Advanced Pro standard, the 5G or NR (New Radio) standard or any other standard using any of the aforementioned waveforms.

[0044] The wireless communications network system depicted in Figure 1 may be a heterogeneous network having two distinct overlaid networks, a network of macro cells with each macro cell including a macro base station, like base station gNB1 to gNB3, and a network of small cell base stations (not shown in Figure 1), like femto- or pico-base stations. In addition to the above described wireless network also non-terrestrial wireless communication networks exist including spaceborne transceivers, like satellites, and / or airborne transceivers, like unmanned aircraft systems. The non-terrestrial wireless communication network or system may operate in a similar way as the terrestrial system described above with reference to Figure 1 , for example in accordance with the LTE-advanced pro standard or the 5G or NR, standard. In the wireless communications network system such as the one depicted schematically in Figure 1 , multi-antenna techniques may be used, e.g., in accordance with LTE, NR or any other communication system, to improve user data rates, link reliability, cell coverage and network capacity. To support multi-stream or multi-layer transmissions, linear precoding is used in the physical layer of the communication system. Linear precoding is performed by a precoder matrix which maps layers of data to antenna ports. The precoding may be seen as a generalization of beamforming, which is a technique to spatially direct or focus a data transmission towards an intended receiver. The precoder matrix to be used at the gNB to map the data to the transmit antenna ports is decided using channel state information, CSI.

[0045] In the wireless communications network system as described above, such as LTE or New Radio (5G), various physical channels are defined for the communication of data payload and control information. In addition, various reference signals are also designed for purposes such as link adaptation and management, demodulation, frame synchronization, cell search, phase tracking, among others. A gNodeB (gNB) oreNodeB (eNB), which could also be a base station, transmits to one or more users in the downlink. A user equipment (UE) or mobile terminal transmits to one or more base stations in the uplink. In the sidelink, two or more user equipments may be involved in communication. The data payload is transmitted via the physical downlink shared channel (PDSCH) in the downlink (DL), via the physical uplink shared channel (PUSCH) in the uplink (UL) and via the physical sidelink shared channel (PSSCH) in the sidelink (SL), of a wireless network. The control information is typically transmitted via the physical downlink control channel (PDCCH) or the enhanced PDCCH (ePDCCH) in certain LTE releases in the downlink (DL), via the physical uplink control channel (PUCCH) in the uplink (UL) and via the physical sidelink control channel (PSCCH) in the sidelink (SL), of a wireless network.

[0046] The physical broadcast channel (PBCH) is transmitted along with the synchronization signals (SS) in the downlink as a SS / PBCH block to aid in cell search and downlink synchronization. The SS / PBCH block may also be called as a synchronization signal block (SSB). The physical sidelink broadcast channel (PSBCH) in the sidelink is similar in structure and functionality to the PBCH. The physical random-access channel (PRACH) in the uplink is characterized by the PRACH preamble and is used for uplink synchronization.

[0047] The PDSCH, PDCCH, PBCH, PUSCH, PUCCH, PSSCH, PSCCH and PSBCH are provided with DeModulation Reference Signals (DMRS) for coherent demodulation of the channel. The number of DM RS antenna ports during a given instance of transmission of the channel is equal to the number of layers transmitted. A layer of the transmission of a channel can be referred to using the DMRS port associated with it. In LTE, the common reference signals (CRS) may be used for DL demodulation, channel estimation, etc. The channel state information reference signals (CSI-RS) are transmitted with a reduced density in the time and frequency domain compared to CRS and plays a crucial role in initiating, maintaining, adapting, and recovering communication links. The following are some uses of the CSI-RS in a wireless network: estimation of the DL channel for adaptation of link parameters such a spatial precoder, modulation order and coding scheme, measurement and reporting of suitable spatial beam(s) for communication, tracking of various parameters required for communication such as average delay, delay spread, Doppler shift / spread, DL pathloss, etc. and recovering a link after its “failure”. For signal precoding at the gNB, several CSI-RS reporting mechanisms are used such as non-precoded CSI-RS and beamformed CSI- RS reporting. For a non-precoded CSI-RS, a one-to-one mapping between a CSI-RS port and a transceiver unit, TXRLI, of the antenna array at the gNB is utilized. Therefore, non-precoded CSI-RS provides a cell-wide coverage where the different CSI-RS ports have the same beam direction and beam width. For beamformed / precoded UE-specific or non-U E-specific CSI-RS, a beamforming operation is applied over a single antenna port or over multiple antenna ports to have several narrow beams with high gain in different directions and, therefore, no cell-wide coverage.

[0048] In a wireless communications network system employing time division duplexing, TDD, due to channel reciprocity, the CSI is available at the base station (gNB). However, when employing frequency division duplexing, FDD, due to the absence of channel reciprocity, the channel is estimated at the UE and the estimate is fed back to the gNB. Figure 2 shows a block-based model of a Multiple Input Multiple Output (MIMO) DL transmission using codebook-based- precoding in accordance with LTE release 8. Fig. 2 shows schematically the base station 200, gNB, the user equipment, UE, 202 and the channel 204, like a radio channel for a wireless data communication between the base station 200 and the user equipment 202. The base station includes an antenna array ANTT having a plurality of antennas or antenna elements, and a precoder 206 receiving a data vector 208 and a precoder matrix F from a codebook 210. The channel 204 may be described by the channel tensor / matrix 212. The user equipment 202 receives the data vector 214 via an antenna or an antenna array ANTR having a plurality of antennas or antenna elements. A feedback channel 216 between the user equipment 202 and the base station 200 is provided for transmitting feedback information. The previous releases of 3GPP up to Release 15 support the use of several downlink reference symbols (such as CSI-RS) for CSI estimation at the UE.

[0049] In FDD systems (up to Rel. 15), the estimated channel at the UE is reported to the gNB implicitly where the CSI report transmitted by the UE over the feedback channel includes the rank index (Rl), the precoding matrix index (PMI) and the channel quality index (CQI) (and the CRI from Rel. 13) allowing, at the gNB, to decide the precoding matrix, and the modulation order and coding scheme (MCS) of the symbols to be transmitted. The PMI and the Rl are used to determine the precoding matrix from a predefined set of matrices fl also referred to as codebook. The codebook, e.g., in accordance with LTE, may be a look-up table with matrices in each entry of the table, and the PMI and Rl from the UE decide from which row and column of the table the precoder matrix to be used is obtained. The precoders and codebooks are designed up to Rel. 15 for gNBs equipped with one-dimensional Uniform Linear Arrays (ULAs) having dual-polarized antennas (in total Nt= 2N±antennas or antenna ports), or with two- dimensional Uniform Planar Arrays (UPAs) having dual-polarized antennas at N N2positions (in total Nt= 2N N2antennas or antenna ports). The ULA allows controlling the radio wave in the horizontal (azimuth) direction only, so that azimuth-only beamforming at the gNB is possible, whereas the UPA supports transmit beamforming on both vertical (elevation) and horizontal (azimuth) directions, which is also referred to as full-dimension (FD) MIMO. The codebook, e.g., in the case of massive antenna arrays such as FD-MIMO, may be a set of beamforming weights that forms spatially separated electromagnetic transmit / receive beams using the array response vectors of the array. The beamforming weights (also referred to as the array steering vectors) of the array are amplitude gains and phase adjustments that are applied to the signal fed to the antennas (or the signal received from the antennas) to transmit (or obtain) a radiation towards (or from) a particular direction. The components of the precoder matrix are obtained from the codebook, and the PMI and the Rl are used to read the codebook and obtain the precoder. The array steering vectors may be described by the columns of a two-dimensional Discrete Fourier Transform (DFT) matrix when ULAs or UPAs are used for signal transmission.

[0050] The precoder matrices used in the Type-I, Type-I multi-panel and Type-ll CSI reporting schemes in 3GPP NR standards are defined by a dual-stage structure (i.e., two components codebook), F = F1F2. The first component or the so-called first stage precoder or matrix, Fl tis used to select a number of beam vectors from a Discrete Fourier Transform-based (DFT- based) matrix, which is also called the spatial codebook. Moreover, the first stage precoder, Fltcorresponds to a wide-band matrix and contains a number of spatial beamforming vectors (the so-called spatial beams) selected from a DFT-based codebook matrix for the two polarizations of the antenna array. The second component or the so-called second stage precoder is used to combine the selected beam vectors. This means the second stage precoder or matrix, F2, corresponds to a selection / combining / co-phasing matrix to select / combine / co-phase the beams defined in F±. For rank-R transmission, F contains v vectors, wherein v denotes the transmission rank, where the entries of each vector are chosen to combine single or multiple beams within each polarization. The selection of the matrices F±and F2is performed by the UE based on reference signals such as CSI-RS and the knowledge of the channel conditions. The selected matrices are indicated in a CSI report in the form of a Rl (the Rl denotes the rank of the precoding matrix) and a PMI and are used at the gNB to update the multi-user precoder for the next transmission time interval.

[0051] The term ‘higher layer’ in the following, when used in isolation, denotes any communication layer above the physical layer in the protocol stack. When the term is used in connection with a specific layer, it denotes any communication in the protocol stack above said layer.

[0052] The term serving cell and carrier component (CC) may be used interchangeably in this disclosure as a serving cell configured for a UE and is usually a separate physical carrier centered around a particular carrier frequency. Depending on the frequency of a component carrier / serving cell, the size of the cell and the beamformed reference signals may vary.

[0053] The term ‘PDxCH’ or ‘PDXCH’ may indicate either the physical downlink shared channel (PDSCH) or the physical downlink control channel (PDCCH), while ‘PLIxCH’ or ‘PLIXCH’ may indicate either the physical uplink shared channel (PLISCH) or the physical uplink control channel (PUCCH). The term ‘PxxCH’ or ‘PXXCH’ may denote a PDSCH, a PDCCH, a PUSCH, a PRACH, a PBCH, a PSSCH, or a PSCCH.

[0054] The phrase ‘fixed / predetermined / provided in the specifications’ in this invention disclosure may mean the following: one or more rules and / or methods and / or particulars regarding certain parameter(s) are provided in the standard specifications that the UE and / or any network node is supposed to follow or implement.

[0055] The term ‘configured’ may mean the following: one or more rules and / or methods and / or particulars regarding one or more parameters as provided in the standard specifications that the wireless device (for example a UE) is supposed to follow or implement are provided to the wireless device by one or more network entities, e.g., via higher layer signaling, like radio resource control, RRC, signaling.

[0056] In certain embodiments, the wireless device (for example a user equipment, UE) is configured to receive from a network node a configuration of one or more Transmission Configuration Indication - State(s), TCI-state(s). In another embodiment, the UE is configured with a configuration of one or more TCI-state(s) via a known rule, e.g., the rule is described in the NR standards. The configuration of a TCI-state comprises at least one of the following:

[0057] 1. one or more reference signals and one or more quasi-colocation, QCL, assumption or setting type per reference signal,

[0058] 2. one or more reference signals, RSs, to be used a pathloss reference (the pathloss estimate computed from said RS(s) is used to compute Tx power for UL channels or RSs), 3. one or more transmit power settings.

[0059] Depending on the indicated setting(s), the TCI-State is a DL TCI-State, an UL TCI-State or a joint TCI-State. A TCI-State is a DL TCI-State if the configuration comprises reception settings - one of more reference signals and one or more QCL assumption or setting type for each reference signal. A DL TCI state does not comprise the second and third settings mentioned above. The setting(s) in a DL TCI-State is / are applied by the UE to DL channels or RSs (the setting(s) in a DL TCI-State are applied for the reception of DL channels or RSs). A TCI-State is an UL TCI-State if the configuration comprises transmission settings, i.e., the second and / or third setting(s) mentioned above. An UL TCI state does not comprise the first setting(s). The setting(s) in an UL TCI-State is / are applied by the UE to UL channels or RSs (setting(s) in an UL TCI-State are applied for the transmission of UL channels or RSs). A TCI-State is a joint TCI-State if the configuration comprises the first setting and, second and / or third setting(s). The setting(s) in a joint TCI-State can be applied by the UE to both UL and DL channels / RSs.

[0060] In certain embodiments, the UE is configured to apply one or more DL or joint TCI-State(s), i.e., the reception setting(s) that are provided in said one or more TCI-State(s), for the reception of a DL reference signal or DL channel (e.g., the Physical Downlink Shared Channel, PDSCH, or the Physical Downlink Control Channel, PDCCH).

[0061] The phrase “application of a TCI-State to a DL reference signal or channel” by the UE has the same meaning as “application of the QCL assumption(s) or setting(s) provided in the TCI-State for the reception of said DL reference signal or channel”.

[0062] Two antenna ports are said to be quasi co-located (QCL-ed) if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. The large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0063] The QCL assumption(s) are performed / applied between ports of two different reference signals, or between ports of a reference signal and DeModulation Reference Signal ports of a physical channel, such as the Physical Downlink Control Channel or the Physical Downlink Shared Channel. The UE may infer one or more large scale channel properties of a channel or reference signal from that / those reference signal which provides the QCL, i.e., the source RS for QCL. The phrase “A DL / SL channel or RS ‘A’ (or the respective port(s)) is QCL-ed, or assumed to be QCL-ed, with an RS ‘b’ (or the respective port(s)) in terms of ‘Doppler shift’ and ‘delay spread’,” implies that said parameters (or channel parameters) for the reception, demodulation, decoding or processing of (said port(s) of) DL / SL channel or RS ‘A’ can be determined, inferred or derived from (the channel corresponding to / the channel corresponding to the port(s) of) RS ‘b’. Here, (port(s) of) RS 'b' is referred to as the QCL source, or source RS, that provides the reference for the measurement of said channel parameters or simply parameters. The (port(s) of the) DL / SL channel or RS 'A' is the target.

[0064] Four different QCL types are defined in the current NR standards to indicate with respect to which parameters QCL assumption(s) is / are to be performed / applied:

[0065] Type A: {Doppler shift, Doppler spread, average delay, delay spread}

[0066] Type B: {Doppler shift, Doppler spread}

[0067] Type C: {Doppler shift, average delay}

[0068] Type D: {Spatial Rx parameter}

[0069] A channel or RS ‘X’ that is QCL-ed, or assumed to be QCL-ed, with a DL RS resource ‘b’ with respect to QCL type ‘A’ implies that the Doppler shift, Doppler spread, average delay, and delay spread for said channel (or the DM RS ports of said channel) or RS ‘X’ can be obtained or derived from (the channel corresponding to) DL RS resource ‘b’.

[0070] A channel or RS ‘X’ that is QCL-ed, or assumed to be QCL-ed, with a DL RS resource ‘b’ with respect to QCL type ‘D’ implies that the channel (or the DM RS ports of said channel) or RS ‘X’ and DL RS resource ‘b’ can be received by the UE with the same spatial receive filter. QCL type ‘D’ is typically applicable to UEs that are capable of receive, Rx, beamforming (for instance, a UE implementing a hybrid or analog beamforming network).

[0071] A TCI state comprises one or more CSI-RS or SSB resources as source RS(s) along with the QCL assumption(s) for each source RS. The RS in the TCI-state is usually a RS that the UE has measured before, so that it can use it as a reference to receive the (port(s) of) target signal or target channel. An RS provided in a TCI-State along with a QCL assumption type can be called as a source RS for QCL.

[0072] A TCI-State comprises at least the following: a RS ‘rT with QCL type ‘XT, and / or a RS ‘r2’ with QCL type ‘X2’, wherein ‘XT, ‘X2’ can be one of ‘A’, ‘B’, ‘C’ or ‘D’. The application of the TCI-State to a DL channel or RS means that the UE performs the QCL assumption(s) as provided in the TCI- State, i.e., the UE assumes that said DL channel or RS is QCL-ed,

[0073] - with RS ‘rT with respect to QCL type ‘XT, if RS ‘rT with QCL type ‘XT is provided in the TCI-State,

[0074] - with RS ‘r2’ with respect to QCL type ‘X2’, if RS ‘r2’ with QCL type ‘X2’ is provided in the TCI-State.

[0075] In certain embodiments, the RS ‘rT and ‘r2’ can be a CSI-RS (e.g., a NZP CSI-RS resource) or an SSB.

[0076] Similarly, the application / performing of a QCL assumption to a DL channel or RS denotes an assumption that said DL channel or RS is QCL-ed with an indicated / specified RS T with respect to an indicated / specified / predetermined QCL type ‘X’ (where ‘X’ can be one of ‘A’, ‘B’, ‘C’ or ‘D’).

[0077] This can also be termed as performing a QCL association. In the above examples, the RS T can be a CSI-RS (e.g., a NZP CSI-RS resource) or an SSB.

[0078] Sounding reference signals (SRS) are UE specific reference signals transmitted by the UE in the uplink and are primarily used to aid the gNB to estimate the UL channel state information (CSI) or UL beam management. The SRS transmissions are performed by the UE on a specific set of frequency domain resources which are configured to the UE by the network. Based on the SRS transmissions, the gNB estimates the CSI on the received SRS signals. The obtained CSI is used for a variety of purposes, namely for link adaptation in the uplink, downlink CSI acquisition, among many others. When uplink and downlink channel reciprocity is assumed, the downlink CSI is obtained based on the estimated uplink CSI. Furthermore, SRS transmissions are used for uplink beam management in 5G NR systems operating at frequency range 2 (FR2).

[0079] One or more sets of SRS resources may be configured to the UE via a higher layer (e.g., RRC) with each resource set comprising one or more resource(s). The time domain behavior - periodic, semi-persistent and aperiodic - as well as the use-case / usage for the SRS - codebook, non-codebook, antenna-switching, beam management, positioning - is specified on a resource set level. Upon reception of the SRS configuration via the higher layer (e.g., RRC), the UE begins to transmit the periodic SRS. For semi-persistent SRS, transmission is performed following explicit MAC-CE activation of the SRS. For aperiodic SRS, transmission is performed following DCI triggering of the SRS. In addition, amongst the use cases, beam management, codebook-based, non-codebook based and antenna switching, the parameter ‘usage’ in ‘SRS-config’ specifies a particular use case for each resource set. A number of parameters such as the following are configured for resource mapping via higher layer configuration of the SRS at the SRS resource level: number of consecutive symbols of transmission in each slot, the starting symbol, the repetition factor and the number of SRS ports. In addition, an SRS resource is assigned with frequency domain resources via a set of parameters such as maximum sounding bandwidth, starting PRB, hopping bandwidth, sounding bandwidth, etc. which may be indicated via the PHY-layer and / or a higher layer configuration / indication (e.g., MAC-CE / RRC).

[0080] Motivation of the invention

[0081] This invention disclosure proposes methods and apparatuses for the operation of multiple Rx port groups at a wireless device (such as a UE or an loT device). A wireless device may be equipped with multiple receive antenna ports. The receive antenna ports are grouped into multiple sets or groups which are referred to as Rx port groups in the following. Each Rx port group may comprise one or more receive antenna ports wherein the port(s) within a group may be capable of coherent reception at the wireless device or the port(s) within a group may comprise common Rx / RF processing chain(s) and / or clocks / oscillators. In the following, different aspects regarding operation of wireless devices with multiple such Rx port groups are discussed:

[0082] • CSI reporting schemes for wireless devices equipped with multiple Rx port groups,

[0083] • Indication of the Rx port group(s) used by the wireless device for DL reception(s),

[0084] • Procedures for separate and simultaneous reception on diverse Rx port groups,

[0085] • Interference assumptions between Rx port groups used by the wireless device when calculating the CSI for CSI reporting.

[0086] CSI Reporting for wireless devices with multiple Rx port groups

[0087] In the following, wireless device (UE) and base station procedures to enable CSI reporting and DL reception for wireless devices equipped with multiple Rx port groups are provided.

[0088] In certain embodiments, a method performed by a wireless device is provided. The method comprises:

[0089] • receiving from a network node, a configuration for a channel state information, CSI, report, • segmenting antenna ports used for reception at the wireless device into at least two receive, Rx, port groups, wherein each Rx port group comprises one or more antenna ports,

[0090] • determining, based on the configuration for the CSI report, one or more CSIs, wherein each CSI of said one or more CSIs is associated with an Rx port group,

[0091] • generating a CSI report comprising said one or more CSIs, and

[0092] • reporting or transmitting to the network node, the CSI report.

[0093] In certain embodiments, a method performed by a wireless device is provided. The method comprises:

[0094] • receiving from a network node, a configuration for a channel state information, CSI, report,

[0095] • determining, based on the configuration for the CSI report, one or more CSIs wherein, o each CSI of said one or more CSIs is associated with a receive (Rx) port group, and o an Rx port group at the wireless device comprises a subset of the antenna ports for reception at the wireless device,

[0096] • generating a CSI report comprising said one or more CSIs, and

[0097] • reporting or transmitting to the network node, the CSI report.

[0098] In certain embodiments, a method performed by a wireless device comprises transmitting the CSI report to the network node via the physical uplink shared channel or the physical uplink control channel.

[0099] In certain embodiments, the wireless device comprises at least two Rx port groups, wherein each Rx port group comprises one or more antenna ports for reception at the wireless device. The reception at the wireless device may be a wireless reception.

[0100] In certain embodiments, the antenna ports of the wireless device that are used for reception are segmented or divided into at least two receive, Rx, port groups, wherein each Rx port group is associated with or comprises one or more (Rx) antenna ports.

[0101] In some options, an antenna port for reception at the wireless device is associated with only one Rx port group.

[0102] The wireless device may use said antenna ports for reception of downlink and sidelink transmissions.

[0103] In some examples, the total number of Rx antenna ports, N, of the wireless device is an even number and the number of Rx port groups at the wireless device is two wherein each Rx port group comprises N / 2 antenna ports. For instance, a wireless device with a total of N = 6 or N = 8 antenna ports for reception would comprise two Rx port groups wherein each Rx port group comprises 3 or 4 antenna ports, respectively.

[0104] Rx port grouping based on UE capability parameter(s)

[0105] In the methods above, the concept of Rx port grouping is used for CSI reporting. This may mean that some information regarding the antenna port layout and / or port grouping at the wireless device may be explicitly revealed to the gNB. Such a reporting and architecturespecific configurations may have the following consequences:

[0106] • revealing the port layout information of the wireless device may violate the UE privacy by revealing its implementation,

[0107] • specification of architecture-specific configurations might lead to limited applicability across various use-cases.

[0108] Therefore, it might be advisable to have a ‘camouflaged’ UE reporting or deriving UE Rx port group based information from existing UE capability reporting that can aid in gNB configuration or scheduling.

[0109] In certain embodiments, the wireless device may be configured to report information on the Rx port groups or number of Rx port groups at the wireless device to a network node, e.g., using a UE capability report. The indication of the number of Rx port groups in the UE capability report can also be indirect, i.e. , the number of Rx port groups is indicated by using other (e.g., existing) parameters in the NR specifications.

[0110] In certain embodiments, a method performed by a wireless device or a User Equipment, UE, is provided, the wireless device comprising at least two receive, Rx, port groups, wherein an Rx port group comprises one or more antenna ports used for the reception at the wireless device, the method comprising reporting information on the Rx port groups and / or number of Rx port groups at the wireless device to a network node using a UE capability report.

[0111] In one example, the wireless device may indicate in a UE capability report, G > 2 values for a maximum number of layers supported by the wireless device for downlink transmissions (e.g., for PDSCH / DL transmissions). This may mean that the wireless device comprises G > 2 Rx port groups. The G values may be identical or non-identical. Each value may be associated with an Rx port group (the wireless device may be considered to comprise G Rx port groups) and may indicate the maximum number of layers supported by the Rx port group.

[0112] In a second example, the wireless device may indicate in a UE capability report, a support for G > 2 SRS resource sets. This may mean that the wireless device is associated with or supports G > 2 Rx port groups. In a third example, the wireless device may indicate in a UE capability report, a support for G > 2 numbers of (maximum) SRS ports per SRS resource or SRS resource set. This may mean that the wireless device is associated with or supports G > 2 Rx port groups.

[0113] In a fourth example, the wireless device may indicate in a UE capability report, a support for G > 2 values for the maximum number of layers for an uplink, UL, transmission. This may mean that the wireless device is associated with or supports G > 2 Rx port groups.

[0114] Note that, in some examples, each value of the G > 2 values may indicate a maximum number of layers for an uplink, UL, transmission.

[0115] In some examples, each of the G > 2 values is an integer and from 0,1 ,2, or 0,1 , 2, 3 or 0,1 , 2, 4, or 0,1 ,2, or 0,1 , 2, 3, or 1 ,2,3, or 1 ,2,4, or 0,1 , 2, 3, 4, or 1 ,2, 3, 4.

[0116] In the above examples, information regarding multiple sets of downlink, DL, reception layers supported by the wireless device or multiple sets of UL ports applicable in an UL resource, RS, or UL transmission configuration, are reported by the wireless device. These parameters are used by the gNB in the configuration and / or indication of DL / UL scheduling and UL reference signals. Such reporting is used to interpret / infer the number of Rx port groups that the wireless device may comprise or support.

[0117] If the wireless device reports G > 2 value(s) corresponding to the port(s) / layer(s) of a UL resource / channel transmission, then the wireless device may be considered to comprise G Tx port group(s), which may translate, in some cases, to G Rx port groups as well.

[0118] Associating a configuration or scheduling with a UE capability parameter or an index of a UE capability value, may indirectly indicate to an Rx port group at the wireless device.

[0119] The G > 2 values in the examples above may be provided in G different UE capability parameters, or provided as a G-length vector in one UE capability parameter.

[0120] In certain embodiments, a UE capability associated with a maximum number of layers or ports or resources or resource sets is represented by a vector comprising G > 2 values. Each value of the vector is associated with at least one configuration or scheduling or CSI and an Rx port group at the wireless device. For example, the association of a configuration / scheduled resource(s) / CSI with a first value of the G values may indicate an association with a first Rx port group, and the association of a configuration / scheduled resource(s) / CSI with a second value of the G values may indicate an association with a second Rx port group at the wireless device, and so on. In another example, a UE capability report comprises G > 2 parameters wherein the G parameters are associated with a maximum number of layers / ports / resources / resource sets. The association of a configuration / scheduled resource(s) / CSI with a first parameter of the G parameters may indicate an association with a first Rx port group, and the association of associating a configuration / scheduled resource(s) / CSI with a second parameter of the G parameters may indicate an association with a second Rx port group at the wireless device, and so on.

[0121] In certain embodiments, the method performed by the wireless device comprises reporting or transmitting to a network node at least one of the following:

[0122] • at least two values or two parameters associated with a (maximum) number of layers (e.g., for a DL / LIL transmission, for a PDSCH / PUSCH, etc.),

[0123] • at least two values or two parameters that correspond to a (maximum) number of SRS ports, e.g., in a SRS resource or in a SRS resource set,

[0124] • a value of at least two for the (maximum) number of SRS resource sets.

[0125] The value(s) or parameter(s) reported above may be part of UE capability reporting. It may indicate the support of said configuration / indication by the wireless device.

[0126] In some cases, said at least two values or the values of said at least two parameters of said UE capability may be identical or non-identical. The index or the ID of the value / parameter reported is used here to identify a Rx port group at the wireless device. The Rx port groups may have identical or non-identical configuration / capabilities.

[0127] In certain embodiments, the UE reports G > 2 parameters associated with one of the aforementioned UE capabilities (number of layers, number of SRS port(s) or number of SRS resource set(s)) - ‘parameterT, ... , ‘parameterG’ - wherein each parameter comprises one value. In some options, the first parameter, ‘parameterT (or its value) corresponds to or is associated with a first index or index T, the second parameter, ‘parameter’ (or its value) corresponds to or is associated with a second index or index ‘2’, and so on.

[0128] In certain embodiments, the UE reports G > 2 values associated with one of the aforementioned UE capabilities (number of layers, number of SRS port(s) or number of SRS resource set(s)) in one parameter - value"! , ... , valueG. In some options, the first value of the parameter, ‘valueT corresponds to or is associated with a first index or index T, the second value ‘value2’ corresponds to or is associated with a second index or index ‘2’, and so on.

[0129] A first UE capability parameter / value or a UE capability parameter / value associated with a first index may be associated with a first Rx port group, a second UE capability parameter / value or a UE capability parameter / value associated with a second index may be associated with a second Rx port group, and so on. In some cases, such an understanding can be part of UE implementation and a UE behavior for mapping of such parameter(s) / value(s) to Rx port group(s) need not be specified.

[0130] In certain embodiments, there is provided a method performed by a wireless device, the method comprising:

[0131] • receiving from a network node, a configuration for a channel state information, CSI, report,

[0132] • determining, based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with user equipment, UE, capability information, and

[0133] • generating a CSI report comprising said one or more CSIs, and

[0134] • reporting or transmitting to the network node, the CSI report.

[0135] In certain embodiments, an association between each of said one or more CSIs and the UE capability information comprises associating each of said one or more CSIs implicitly or explicitly with an index or an indicator that indicates, maps or points to a UE capability value and / or parameter.

[0136] The above method may be applied when there are at least two UE capability value(s) and / or parameter(s) that can be indicated or mapped.

[0137] In this disclosure, a mapping or an association with an index of UE capability parameter(s) or value(s) may mean that the UE provides / transmits in UE capability report(s), G > 2 values or parameters, wherein the association is made with one of said G values or parameters.

[0138] In certain embodiments, said UE capability parameter(s) / value(s) is / are related to at least one of the following:

[0139] • (maximum) number of layers (e.g., for a DL / UL transmission, for a PDSCH / PUSCH, etc.),

[0140] • (maximum) number of SRS ports,

[0141] • a value of at least two for the (maximum) number of SRS resource sets supported.

[0142] In certain embodiments, the association between an Rx port group, or an (index of a) UE capability parameter / value, and

[0143] • a CSI, or

[0144] • a CSI-RS resource or one or more ports of a CSI-RS resource, or

[0145] • a PDSCH / PUSCH or a codeword of a PDSCH / PUSCH, or

[0146] • a CDM group of DMRS ports of a PDSCH / PUSCH, is indicated / configured to the wireless device via a PHY-layer or higher layer signaling from the network node, and / or is fixed in the NR specifications.

[0147] In certain embodiments, there is provided a method performed by a wireless device, the method comprising:

[0148] • receiving from a network node, a configuration for a channel state information, CSI, report,

[0149] • determining, based on the configuration for the CSI report, one or more CSIs, wherein each CSI of said one or more CSIs is associated implicitly or explicitly with an index or an indicator that indicates, maps or points to a value that is determined based on a UE capability parameter, and

[0150] • generating a CSI report comprising said one or more CSIs, and

[0151] • reporting or transmitting to the network node, the CSI report.

[0152] In certain embodiments, said index or indicator takes values based on said UE capability parameter. For example, said UE capability parameter may indicate / comprise a value of G > 2 and said index or indicator may indicate or map to one of G' < G different values or one of G different values.

[0153] In certain embodiments, the method performed by a wireless device comprises providing / transmitting in a UE capability report, a parameter related to at least one of the following: number of Rx port groups or Rx / RF processing chains at the wireless device,

[0154] (maximum) number of SRS resources or SRS resource sets, number of PDSCHs / PUSCHs that can be scheduled with partial / full overlap in time and / or frequency, number of possible values of an index / indicator that a CSI can be associated with, number of possible values of an index / indicator that a codeword of a PDSCH / PUSCH can be associated with, number of possible values of an index / indicator that a CDM group of DMRS port(s) of a PDSCH / PUSCH can be associated with, number of possible values of an index / indicator that a DCI scheduling PUSCH / PDSCH can be associated with.

[0155] A mapping or an association with an Rx port group (either implicitly via rule(s) in the specification or explicitly by network signaling via the PHY-layer and / or higher layer), in this disclosure, may mean that a wireless device provides / transmits in a UE capability report, a parameter associated with any of the aspects described above indicating a value of G, wherein an index or indicator used for said mapping / association points to or maps to one of G' < G different values or one of G different values. An association or mapping with a first Rx port group implies a mapping / association with a first value or a first index (e.g., value / index ‘0’), and an association or mapping with a second Rx port group implies a mapping / association with a second value or a second index (e.g., value / index T), and so on.

[0156] In this disclosure, a wireless device configured with, provided with or comprising B > 1 Rx port groups may mean that, in a UE capability report, the wireless device may provide / transmit a value of B > 1 for any of the aforementioned UE capability parameters.

[0157] In this disclosure, a mapping or an association with an index corresponding to a UE capability parameter or value may mean that the UE provides / transmits in a UE capability report, a parameter indicating a value of G > 2, wherein a mapping or associated is performed with one of G' < G different values or indices or one of G different values or indices. For example, the mapping or association may be performed to value(s) or index / indices 0, ..., G' - 1, or 0, ..., G - 1 or 1, ..., G' or 1, ..., G.

[0158] In certain embodiments, the method performed by the wireless device comprises reporting information on the transmit, Tx, or uplink antenna ports used for uplink transmissions at the wireless device to a network node, e.g., using a UE capability report. A wireless device may comprise one or more Tx port groups, each comprising zero, one or more antenna ports. The indication of the number of Tx port groups in the UE capability report can also be indirect. This means, the number of Tx port groups is indicated by using other (e.g., existing) parameters in the NR specifications.

[0159] In certain embodiments, the wireless device is associated with or supports GT> 2 Tx port groups. There is an association between an Rx port group and a Tx port group. In some cases, there is a one-to-one association between an Rx port group and a Tx port group. This means that for each Rx port group there is a Tx port group.

[0160] In certain embodiments, a Tx port group may be associated with a value among GT> 2 values indicated for a UE capability parameter in a UE capability report or GT> 2 parameters indicated in a UE capability report each comprising a value.

[0161] In some examples, the wireless device may indicate in a UE capability report, a support for GT> 2 values for the maximum number of layers for an uplink, UL, transmission. Note that a value among said GTvalues can also be zero. This would mean that the wireless device does not comprise a Tx port group for the corresponding Rx port group where the Tx port group is associated with.

[0162] In some examples, each of the GT> 2 values is an integer and from {0,1 ,2} or {0,1 , 2, 3} or {0, 1 ,2,4} or {0, 1 ,2} or {0, 1 ,2,3} or {1 ,2,3} or {1 ,2,4} or {0, 1 ,2,3,4} or {1 ,2,3,4}.

[0163] CSI parameters and hypotheses w.r.to Rx port groups or UE capability parameters / values

[0164] In certain embodiments, the wireless device performs measurements on one or more CSI resources and determines a CSI associated with an Rx port group or (an index of a) UE capability parameter or value. The CSI resource(s) on which the measurements are performed is / are configured or provided in the CSI report configuration received from the network node.

[0165] In certain embodiments, the wireless device configured to provide / transmit / include at least >

[0166] I CSIs in a CSI report, wherein the j-th CSI, i = 1, is associated with L; > 1 layers or transmission layers, and each CSI is associated with an Rx port group or (an index of a) UE capability parameter or value. Let the total number of layers reported across the X CSI(s) be

[0167] In certain embodiments, a CSI associated with an Rx port group or (an index of a) UE capability parameter / value and includes at least one of the following CSI quantities: a precoding matrix identifier, PMI, a rank indicator, Rl, a channel quality indicator, CQI. In some examples, the PMI is based on a legacy Type-1 or Type-ll codebook (e.g., the Rel. 15 Type-I codebook, the Rel. 15 or Rel. 16 Type-ll codebook, the Rel. 16 Type-ll port selection codebook, the Rel. 17 Type-ll port selection codebook, the Rel. 18 CJT Type-ll codebook, the Rel. 18 CJT Type-ll port selection codebook, the Rel. 18 Doppler Type-ll codebook, or the Rel. 18 Doppler Type-

[0168] II port selection codebook) or a new codebook.

[0169] In certain embodiments, a CSI comprises at least a PMI and the PMI (or simply CSI in the following) is associated with a number of layers (or rank) of the precoder or transmission layers of a corresponding downlink transmission.

[0170] In certain embodiments, a CSI comprises at least a value corresponding to a wideband CQI or a subband CQI.

[0171] In certain embodiments, a CSI comprises at least one indication of a rank or number of transmission layers, or the number of layers of the precoder which is indicated by the PMI in the CSI.

[0172] In certain embodiments, the wireless device is configured to determine, based on the CSI report configuration, one or more CSIs, wherein a CSI is associated with • a value or parameter associated with a number of layers (e.g., maximum number of layers), wherein said value or parameter is a UE capability, and / or

[0173] • a value or parameter associated with a number of SRS ports of SRS resource(s) or resource set(s) or a number of SRS resources / resource sets, wherein said value or parameter is a UE capability.

[0174] In certain embodiments, the CSI report comprises one or more CSIs, wherein the CSI report comprises an indication or index indicating or mapping to an Rx port group or a (index of a) UE capability parameter / value that a CSI in the CSI report is associated with. In some examples, the indication / index is present per CSI.

[0175] In certain instances, the indication / index is a bit field. The bit field can be of size 1 < b < l°g2 / Vg], where / Vgis equal to the number of Rx port groups at the wireless device (or a value set to an aforementioned UE capability parameter) or the number of (one of the aforementioned) UE capability parameters / values provided / transmitted by the UE. The value of the bit field indicates or maps or points to an Rx port group or it maps to a UE capability parameter / value. For example, a value of r denoted by the ‘b’-sized bit field may indicate / map / point to an r-th Rx port group or an r-th UE capability parameter / value. In some other examples, a value of r denoted by the ‘b’-sized bit field may indicate / map / point to Rx port group or a UE capability parameter / value of index r or r + 1.

[0176] In some options, the value of Ngis equal to the value of G described above.

[0177] In case that there are two Rx port groups at the wireless device, a field of size equal to one bit is included in a CSI. When the bit field corresponding to a CSI is ‘O’, the CSI is associated with a first Rx port group and when the bit field corresponding to a CSI is T, the CSI is associated with a second Rx port group.

[0178] In case that the UE reports two parameters / values regarding its capability of a maximum numbers of layers / ports / RS resources or resource sets that can be configured / used / indicated in the UL or DL, a field of size equal to one bit is included in a CSI. When the bit field corresponding to a CSI is ‘O’, the CSI is associated with a first UE capability parameter / value and when the bit field corresponding to a CSI is T, the CSI is associated with a second UE capability parameter / value.

[0179] In certain embodiments, the wireless device is configured to provide in the CSI report, at least one index / indicator that indicates or maps / points to

[0180] • a value or parameter associated with a number of layers (e.g., maximum number of layers), wherein said value or parameter is a UE capability, or a value or parameter associated with a number of ports of SRS resource(s) / resource set(s) or a number of SRS resources / resource sets, wherein said value or parameter is a UE capability.

[0181] Single CSI Reporting

[0182] In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report comprising a single CSI, wherein the CSI is associated with one of the at least two Rx port groups of the wireless device.

[0183] In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report comprising a single CSI, wherein the CSI is associated with one of the said at least two UE capability parameters / values.

[0184] In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report comprising a single CSI, wherein the CSI is associated with one of the said at least two indices corresponding to a UE capability parameter / value.

[0185] In certain embodiments, for the computation of the CSI, the UE assumes that interference is absent (i.e. , assumes no interference) from transmission layer(s) associated with the other Rx port group(s) or (index / indices of / corresponding to a) UE capability parameter / value that is / are different from the one associated with said CSI.

[0186] In certain examples, the wireless device determines a CSI for each of the at least two Rx port groups, UE capability parameters / values or indices corresponding to a UE capability parameter, selects a single CSI with respect to a specific performance measure or metric (e.g., the one that achieves a higher rate, RSRP or SINR) and includes the selected CSI in the CSI report.

[0187] With the above approach, the wireless device reports CSI(s) for a scheduling of DL transmissions at a network node to be received by the wireless device with only one of the Rx port groups. In the following, methods for reporting multiple CSIs that enable the following usecases are provided:

[0188] • DL reception using multiple Rx port groups at the wireless device with independent scheduling of transmission layers to Rx port groups,

[0189] • DL reception using a single Rx port group at the wireless device without any interfering scheduling on another port group.

[0190] Two CSI Reporting

[0191] In certain embodiments, the wireless device is configured to determine and provide / transmit a CSI report comprising at least two CSIs, wherein each CSI is associated with an Rx port group or (index of / index corresponding to a) UE capability parameter / value. In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report, wherein the CSI report comprises at least two CSIs, wherein a first CSI is associated with a first Rx port group at the wireless device or a first (index of / index corresponding to a) UE capability parameter / value and a second CSI is associated with a second Rx port group at the wireless device or a second (index of / index corresponding to a) UE capability parameter / value, and so on.

[0192] In certain embodiments, the wireless device is configured to determine and provide / transmit a CSI report comprising at least two CSIs, wherein a first CSI is associated with > 1 transmission layers, and a second CSI is associated L2> 1 transmission layers, and so on.

[0193] In some examples, each CSI is associated with a different Rx port group or a different (index of a) UE capability parameter / value.

[0194] In certain embodiments, when determining an j-th CSI, the wireless device assumes that there is no interference from transmission layer(s) associated with other Rx port group(s) or (index of / index corresponding to a) UE capability parameter / value that is different from the one associated with said j-th CSI. In other words, the wireless device assumes that a corresponding DL transmission based on the CSI is scheduled to the Rx port group the CSI is associated with.

[0195] In certain embodiments, for the computation of an j-th CSI that is related to L; layers in the CSI report, the L - Lt layer(s) indicated by the other CSI(s) is / are not considered as interference.

[0196] In certain embodiments, for determining an j-th CSI, the wireless device assumes interference from transmission layer(s) associated with at least one Rx port group or (index of / corresponding to a) UE capability parameter / value that is different from the one associated with the j-th CSI. In certain examples, the transmission layer(s) assumed as interference with an j-th CSI may be associated with one or more CSIs provided in the CSI report. This may mean that the transmission layer(s) corresponding to at least an j-th CSI may be considered as interference in the computation of the j-th CSI, with i #= j. The j-th and j-th CSIs are associated with different Rx port groups or (indices of) UE capability parameter(s) / value(s). In some cases, there may be more than one CSI in the CSI report the transmission layer(s) associated with which is / are considered as interference (layers) in the computation of the j-th CSI. In other words, the wireless device assumes that a corresponding DL transmission based on two CSIs (ith CSI and jth CSI) is scheduled to two Rx port groups the CSIs (jth CSI and jth CSI) are associated with. In certain embodiments, for determining an j-th CSI, the UE assumes interference from the transmission layer(s) associated with at least a j-th CSI provided in the CSI report, wherein i j-

[0197] In certain embodiments, there may be two or more CSIs provided in the CSI report that are associated with the same Rx port group or same (index of) UE capability parameter / value.

[0198] In certain embodiments, the UE reports two CSIs associated with two different Rx port groups or (indices of) UE capability parameter(s) / value(s), wherein for the computation of the first or the second CSI, the UE does not assume interference (or assumes no interference) from transmission layer(s) corresponding to any Rx port group or (index / indices of / corresponding to a) UE capability parameter(s) / value(s) other than the one associated with said CSI. This method of reporting is used to enable Rx port group switching / selection for DL / SL reception, i.e. , the UE operates only one Rx port group for reception at a given instant in time and the other Rx port groups are not used for reception.

[0199] In certain embodiments, the UE reports two CSIs corresponding to two different Rx port groups or (indices of) UE capability parameter(s) / value(s), wherein

[0200] • for the computation of the first CSI, the wireless device may assume that the L2transmission layer(s) associated with a second CSI is / are interference to the transmission layer(s) associated with the first CSI, and

[0201] • for the computation of the second CSI, the wireless device may assume that the transmission layer(s) associated with the first CSI is / are interference to the L2transmission layer(s) associated with the second CSI.

[0202] Three CSI Reporting

[0203] In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report comprising at least three CSIs, wherein

[0204] • a first CSI is associated with a first Rx port group at the wireless device or a first (index of a) UE capability parameter / value,

[0205] • a second CSI is associated with a second Rx port group at the wireless device or second (index of a) UE capability parameter / value, and

[0206] • a third CSI is associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values.

[0207] In certain options, a first CSI is associated with > 1 transmission layers and a second CSI is associated with L2> 1 transmission layers. In the computation of the first CSI, the wireless device may assume that the L2transmission layer(s) associated with the second CSI is / are interference to the transmission layer(s) associated with the first CSI. Similarly, in the 1 computation of the second CSI, the wireless device may assume that the L transmission layer(s) associated with the first CSI is / are interference to the L2transmission layer(s) of the second CSI. In other words, when determining the first and second CSI, the wireless device assumes that a DL transmission is scheduled to at least two Rx port groups (the two CSIs are associated with) at the wireless device.

[0208] The third CSI is associated with L3> 1 transmission layer(s) that is / are associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values. In some examples, the third CSI may be associated with said first or second Rx port group at the wireless device or said first or second (index of) UE capability parameter / value. In some options, said third CSI may be computed without consideration of interference with respect to any layer(s) associated with

[0209] • any Rx port group at the wireless device other than the one associated with the third CSI,

[0210] • any other (index of) UE capability parameter / value other than the one associated with the third CSI, or

[0211] • any other CSI.

[0212] With the aforementioned CSI report comprising three CSIs, two use-cases are simultaneously served: gNB scheduling of simultaneous reception across different port groups, and UE selection in case of single port group scheduling (Rx port group switching / selection during DL / SL operation).

[0213] Four CSI reporting

[0214] In certain embodiments, the wireless device is configured to determine and provide / transmit to a network node, a CSI report comprising at least four CSIs wherein,

[0215] • a first CSI is associated with a first Rx port group at the wireless device, or a first (index of a) UE capability parameter / value,

[0216] • a second CSI is associated with a second Rx port group at the wireless device or a second (index of a) UE capability parameter / value, wherein when the determining the first and second CSI, the wireless device assumes that, o the L2transmission layer(s) associated with the second CSI is / are considered as interference to the transmission layer(s) of the first CSI, and o the Li transmission layer(s) associated with the first CSI is / are considered as interference to the L2transmission layer(s) of the second CSI,

[0217] • a third CSI is associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values, and

[0218] • a fourth CSI is associated with an Rx port group at the wireless device or (index of a) UE capability parameter / value different from that of the third CSI, wherein in the determination of the third or fourth CSI, no interference with respect to the other Rx port group(s) at the wireless device or other (indices of) UE capability parameter(s) / value(s) is considered.

[0219] In certain examples, the third and fourth CSIs are associated with said first and second Rx port groups or (indices of) UE capability parameter(s) / value(s), respectively.

[0220] In certain embodiments, the layer(s) associated with a CSI computed with respect to a certain Rx port group at the wireless device or (index of a) UE capability parameter / value may or may not be considered as interference to the layer(s) corresponding to another CSI in the CSI report. Such assumption(s) regarding interference for the CSI computation(s) may be provided to the UE by network signaling via the PHY-layer or a higher layer, or fixed in the specifications.

[0221] X CSI(s)

[0222] In certain embodiments, the wireless device is configured to provide / transmit / include X > 1 CSIs in a CSI report, wherein each CSI is associated with an Rx port group at the wireless device ora (index of / index corresponding to a) UE capability parameter / value. In some options, the value of X is configured to the wireless device by a network node via the PHY-layer or a higher layer and / or is known to the wireless device (e.g., the value is defined in the NR specifications). Each CSI may be associated with one or more layers or transmission layers.

[0223] In certain embodiments, the wireless device is configured or indicated, via the PHY-layer or a higher layer, from the network node, the Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s) with respect to which CSI(s) are to be provided by the wireless device.

[0224] In certain examples, the wireless device provides the CSIs in the CSI report in the order of the Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s) configured or indicated to the wireless device with which the CSIs are associated with.

[0225] In certain embodiments, the wireless device may select the Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s) with respect to which CSI(s) are to be reported. In certain examples, the UE may provide via an indication / index per CSI in the CSI report, the Rx port group or (index of) UE capability parameter / value associated with the CSI.

[0226] In certain embodiments, the Rx port group(s) or (index / indices of / corresponding to a) UE capability parameter(s) / value(s) with respect to which CSI(s) is / are to be reported is known by the wireless device (e.g., defined in the NR specifications). When determining one of the X CSIs, the wireless device may assume that all layers of a corresponding DL transmission are associated with (or scheduled by the network node to) the Rx port group or (index of) UE capability parameter / value the CSI is associated with, i.e. , the wireless devices assumes no interference from layer(s) associated with Rx port groups or (indices of) UE capability parameters / values that the CSI is not associated with. The UE assumes that for a given CSI, the Rx port groups or (indices of) UE capability parameters / values other than those the CSI is not associated with are not used for a corresponding DL transmission (e.g., a PDSCH transmission). This method enables the wireless device to calculate a CSI with respect to a single Rx port group at the wireless device without interfering DL transmissions from other Rx port group(s) at the wireless device.

[0227] When X = 1, the CSI report comprises at least one CSI associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values.

[0228] In one option, the Rx port group or UE capability parameter / value the CSI is associated with is indicated or configured to the wireless device. In another option, the wireless device may select the Rx port group or UE capability parameter / value the CSI is associated with. In another option, the Rx port group the CSI is associated with is known by the wireless device (e.g., it is defined in the NR specifications).

[0229] In certain embodiments, when X > 2, the CSI report comprises at least two CSIs, wherein each of the X CSIs is associated with a different Rx port group at the wireless device, or a different (index of) UE capability parameter / value.

[0230] In certain embodiments, when X = 2, for the computation of the first or the second CSI, the wireless device assumes no interference from layers associated with an Rx port group or (index of a) UE capability parameter / value that is different from that of the one associated with the CSI.

[0231] In certain embodiments, when X = 2, for the computation of the first or the second CSI, the UE assumes interference with

[0232] • layers associated with the other CSI, or

[0233] • layers associated with an Rx port group or (index of a) UE capability parameter / value that is not associated with the CSI.

[0234] X’+n CSI(s) in a CSI report In certain embodiments, the wireless device is configured with a value of X' , wherein the wireless device provides or transmits a CSI report comprising X' CSIs and n additional CSIs, i.e. , a total of X' + n CSIs in a CSI report. In some options, the value of n is either fixed in the NR specifications (known to the wireless device) or provided by the network node. In some options, the value of X' is received by the wireless device from a network node via the PHY- layer or a higher layer (e.g., RRC),

[0235] In certain embodiments, one or more parameters and / or assumptions associated with the computation and / or reporting of said X' CSIs and / or the additional n CSIs is / are provided to the wireless device by the network node or fixed in the NR specifications.

[0236] In some examples, the value of n is 1 or 2. In some examples, the value of " is 0, 1 , 2, 3 or 4.

[0237] In one example, the wireless device is configured with X' = 2. Then the wireless device may provide a CSI report comprising X' + 1 = 3 CSIs. In another example, the UE may provide a CSI report comprising X' + 2 = 4 CSIs. The value of n = 1 or n = 2 in the above examples may be configured to the wireless device or fixed in the NR specifications (and hence known to the wireless device).

[0238] In certain embodiments, the wireless device provides X' + n CSI(s) in a CSI report, wherein

[0239] • when determining a CSI among the X' CSI(s), the wireless device assumes no interference from layers associated with Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s) other than the one associated with the CSI, and

[0240] • when determining a CSI of the n CSI(s), the wireless device assumes as an interference, o the transmission layer(s) associated with at least one Rx port group or (index of a)

[0241] UE capability parameter / value that is different from that of the one associated with the CSI, or o the transmission layer(s) associated with at least one other CSI provided in the CSI report.

[0242] In certain embodiments, the wireless device is configured with a value of X', wherein

[0243] • the wireless device reports at total of X CSI(s) in a CSI report in which X = X' + n,

[0244] • a CSI is associated with an Rx port group at the wireless device or (an index of) a UE capability parameter / value,

[0245] • X' CSI(s) among the X reported CSI(s) are associated with X' different Rx port groups or (indices of) UE capability parameters / values. In certain embodiments, the wireless device is configured with a value of X' , wherein

[0246] • the wireless device reports at total of X CSI(s) in a CSI report in which X = X' + n,

[0247] • a CSI is associated with an Rx port group at the wireless device or (an index of) a UE capability parameter / value,

[0248] • X' CSI(s) among the X reported CSI(s) is / are associated with X' different Rx port groups or (indices of) UE capability parameters / values, and in the computation of any of the X' CSIs, no interference is assumed with layers associated with an Rx port group or (index of a) UE capability parameter / value that is different from that of the one associated with the CSI.

[0249] In certain embodiments, the wireless device is configured with a value of X' , wherein

[0250] • the wireless device reports at total of X CSI(s) in a CSI report in which X = X' + n,

[0251] • a CSI is associated with an Rx port group at the wireless device or (an index of) a UE capability parameter / value,

[0252] • for the computation of an (X' + n)-th CSI, the wireless device assumes as an interference, transmission layers associated with at least one Rx port group or (index of a) UE capability parameter / value that is different from that of the one associated with the CSI.

[0253] In certain embodiments, the wireless device is configured with a value of X' , wherein

[0254] • the UE reports at total of X CSI(s) in a CSI report in which X = X' + 2,

[0255] • a CSI is associated with an Rx port group at the wireless device or (an index of) a UE capability parameter / value,

[0256] • the X' + l)-th CSI or X' + 2)-th CSI is associated with two different Rx port groups or (indices of) UE capability parameters / values, and in the computation of any of the X' + 1)- th CSI or (X' + 2)-th CSI, the wireless device assumes as an interference, transmission layers associated with at least one Rx port group or (index of a) UE capability parameter / value that is different from that of the one associated with the CSI.

[0257] In certain examples, the CSI report may comprise a CSI that is associated with the layers assumed as an interference to another CSI provided in the CSI report.

[0258] In certain examples, the transmission layer(s) associated with the (X + l)-th CSI is / are assumed as an interference for the computation of the (X + 2)-th CSI, and the transmission layer(s) associated with the (X + 2)-th CSI is / are assumed as an interference for the computation of the X + l)-th CSI.

[0259] In the aforementioned methods, the X' CSIs are to enable to UE to report CSI based on operating only one Rx port group at the UE and the reported CSI with respect to an Rx port group considers no simultaneous interfering reception at any other Rx port group. If X' is zero, it may mean that the UE may operate multiple Rx port groups simultaneously.

[0260] In certain embodiments, when X' > 1, the wireless device may include X' CSIs in the CSI report, wherein the X' Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s) with which the X' CSI(s) is / are associated with is / are

[0261] • determined by the wireless device,

[0262] • configured / indicated by the network node, or

[0263] • fixed in the NR specifications.

[0264] Based on the type of decision in CSI reporting (network indication / UE decision / specification directive), various modes of UE Rx port group operations can be realized.

[0265] The n CSIs reported in addition to the X' CSIs is / are to enable simultaneous reception at the wireless device using at least two Rx port groups. In the computation of the nadditional CSIs, the UE assumes interference from layers associated with at least one Rx port group or (index of) UE capability parameter / value that is different from the one associated with the CSI. This means, with two additional CSIs, simultaneous scheduling and reception at two Rx port groups at the wireless device can be enabled, with the CSIs optimized for the interference across the two Rx port groups.

[0266] In certain embodiments, the wireless device is configured receive from a network node, a CSI report configuration that comprises only one CSI-RS resource for channel measurement.

[0267] In certain embodiments, the wireless device is configured to report no CSI-RS resource indicator(s) in said CSI report.

[0268] In certain embodiments, the wireless device is configured to provide / transmit / include X > 1 CSIs in a CSI report, wherein a CSI comprises at least the following parameters:

[0269] • a rank indication, Rl,

[0270] • a channel quality indication, CQI.

[0271] In certain embodiments, the wireless device is configured to provide / transmit / include X > 1 CSIs in a CSI report, wherein a CSI comprises at least the following parameters:

[0272] • a rank indication, Rl,

[0273] • a precoder matrix indication, PMI,

[0274] • a layer indication, LI, if configured in the CSI report configuration,

[0275] • a channel quality indication, CQI.

[0276] Rx port group indication In certain embodiments, the wireless device is configured to perform an association or mapping between Z > 1 CDM group(s) of the DM RS of a PDSCH and Z Rx port group(s) at the wireless device or (index / indices of) UE capability parameter(s) / value(s). In certain examples, the wireless device receives an indication or configuration from a network node, via the PHY-layer or a higher layer indicating said association or mapping. In one option, the wireless device receives said indication on a PDCCH / DCI scheduling said PDSCH. In another option, a parameter or configuration associated with a PDCCH / DCI scheduling said PDSCH determines the association (for example, a parameter provided in the configuration of a search space / CORESET associated with said PDCCH / DCI). In certain examples, the rule(s) for the association / mapping is / are provided in the NR specifications.

[0277] In certain embodiments, the wireless device is configured to perform an association / mapping of DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a first Rx port group or a first (index of a) UE capability parameter / value and the DMRS / antenna port(s) associated with CDM group ‘1’ of the PDSCH with a second Rx port group or a second (index of a) UE capability parameter / value, and so on. In some examples, this behavior is indicated by a network node by a value of ‘0’ for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0278] In certain embodiments, the wireless device is configured to perform an association / mapping of DMRS / antenna port(s) associated with CDM group T of the PDSCH with a first Rx port group or a first (index of a) UE capability parameter / value and the DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a second Rx port group or a second (index of a) UE capability parameter / value, and so on. In some examples, this behavior is indicated by a network node by a value of ‘0’ for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0279] In certain embodiments, the wireless device is configured to perform an association or mapping between 1 < Q < 2 codewords / transport blocks of a PDSCH and Q Rx port group(s) or (index / indices of) UE capability parameter(s) or value(s). In certain examples, the wireless device receives an indication or configuration from a network node, via the PHY-layer or a higher layer indicating / determining said association / mapping. In one option, the wireless device receives said indication on a PDCCH / DCI scheduling said PDSCH. In another option, a parameter or configuration associated with a PDCCH / DCI scheduling said PDSCH determines the association (for example, a parameter provided in the configuration of a search space / CORESET associated with said PDCCH / DCI). In certain examples, the rule(s) for the association / mapping is / are provided in the specifications. In certain embodiments, the wireless device is configured to perform an association / mapping of a first codeword / transport block of the PDSCH with a first Rx port group or a first (index of a) UE capability parameter or value and a second codeword / transport block of the PDSCH with a second Rx port group or a second (index of a) UE capability parameter or value, and so on. This behavior, in some examples, is indicated by a network node by a value of ‘0’ for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0280] In certain embodiments, the wireless device is configured to perform an association / mapping of a second codeword / transport block of the PDSCH with a first Rx port group or a first (index of a) UE capability parameter or value and a first codeword / transport block of the PDSCH with a second Rx port group or a second (index of a) UE capability parameter or value, and so on. This behavior, in some examples, is indicated by a network node by a value of T for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0281] In certain embodiments, the wireless device is configured to perform an association of a PDSCH with an Rx port group or a (index of a) UE capability parameter or value. In certain examples, the UE receives an indication / configuration from a network node, via the PHY-layer or a higher layer indicating / determining said association. In one option, the UE receives said indication on a PDCCH / DCI scheduling said PDSCH. In another option, a parameter or configuration associated with a PDCCH / DCI scheduling said PDSCH determines the association (for example, a parameter provided in the configuration of a search space / CORESET associated with said PDCCH / DCI). In certain examples, the rule(s) for the association is provided in the specifications.

[0282] In certain embodiments, the wireless device is configured to perform an association of a PDSCH with a first Rx port group or a first (index of a) UE capability parameter or value. This behavior, in some examples, is indicated by a value of ‘0’ for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0283] In certain embodiments, the wireless device is configured to perform an association of a PDSCH with a second Rx port group or a second (index of a) UE capability parameter or value. This behavior, in some examples, is indicated by a value of T for the indication (for e.g., on the PDCCH / DCI scheduling the PDSCH).

[0284] In certain embodiments, the wireless device is configured to receive a PDSCH, one or more DM RS ports of a PDSCH, or a codeword of a PDSCH on one or more port(s) of an Rx port group associated with a (index of a) UE capability parameter / value, that is / are associated with said PDSCH, or DMRS port(s) of said PDSCH or codeword of said PDSCH.

[0285] In certain embodiments, the wireless device is configured to receive at least two PDCCHs / DCIs, wherein

[0286] • each PDCCH / DCI schedules a PDSCH and is associated with a different value of an index or an indicator, and

[0287] • the scheduled PDSCHs overlap partially or fully in time and / or frequency.

[0288] In certain embodiments, a PDSCH scheduled by a first PDCCH / DCI that is associated with a first value of an index / indicator is associated with a first Rx port group or a first (index of a) UE capability parameter or value, and a PDSCH scheduled by a second PDCCH / DCI that is associated with a second value of an index / indicator is associated with a second Rx port group or a second (index of a) UE capability parameter or value, and so on.

[0289] In some examples, said first PDCCH / DCI is associated with a first value of said index or indicator (e.g., ‘0’) and said second PDCCH / DCI is associated with a second value of said index or indicator (e.g., ‘1’), and so on. In some examples, said index or indicator is provided in a field of said PDCCHs or DCIs. In some other examples, said index or indicator is configured via a higher layer for said PDCCHs or DCIs (for example, it is provided in the configuration of the search space or CORESET associated with said PDCCH or DCI).

[0290] In some examples, the mapping between a value of said index / indicator and a Rx port group or (index of a) UE capability parameter / value is fixed in the specifications. In some options, said mapping is one-to-one.

[0291] In certain embodiments, the DMRS port(s) indicated in a given PDCCH / DCI is associated with a CDM group that is different from that of the DMRS port(s) indicated in any of the other said PDCCHs / DCIs. In some examples, a rule for the index of the CDM group that a PDCCH / DCI associated with a given value of an index can indicate is fixed in the specifications (for e.g., a PDCCH / DCI associated with an index i may indicate DMRS port(s) from a CDM group ct, and this mapping between a value of i and a value of ctmay be one-to-one).

[0292] In certain embodiments, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator in a field of one of the said PDCCHs / DCIs is different from the value of said index or indicator in said field of any of the other said PDCCHs / DCIs. In certain embodiments, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator associated via a higher layer with said PDCCHs / DCIs is different from the value of said index or indicator associated via a higher layer with any of the other said PDCCHs / DCIs.

[0293] In certain embodiments, each of the said at least two PDCCHs / DCIs are received on a different CORESET, and a given CORESET among said CORESETs is associated with a value of CORESET pool index that is different from the value of the CORESET pool index associated with any of the other said CORESETs. The CORESET pool index is an index / parameter that is either provided in the configuration of the CORESET or associated with a CORESET via fixed rule(s) in the specification.

[0294] CSI-RS resource configuration

[0295] In certain embodiments, the wireless device is configured with a single (non-zero power, NZP) CSI-RS resource for channel measurement in a CSI report configuration, wherein the CSI-RS resource comprises several antenna or CSI-RS ports. The wireless device receives the CSI- RS ports which are comprised in the CSI-RS resource and transmitted by the network node on two or more of the Rx port groups at the wireless device.

[0296] In some options, the wireless device generates a CSI report that comprises CSI(s) corresponding to one or more Rx port groups, and transmits the CSI report via an uplink channel (e.g., PLISCH or PLICCH) to a network node.

[0297] In certain embodiments, the wireless device (such as a UE or an loT device) is configured with at least two (NZP) CSI-RS resources for channel measurement in a CSI report configuration, wherein each CSI-RS resource comprises several antenna or CSI-RS ports. The wireless device receives the CSI-RS ports which are comprised in a first CSI-RS resource and transmitted by the network node on a first Rx port group and the CSI-RS ports which are comprised in a second CSI-RS resource on a second Rx port group, and so on. In some cases, the CSI report comprises information of an association between a CSI-RS resource and an Rx port group. For instance, each CSI may comprise an index or indicator associated with an Rx port group.

[0298] In certain embodiments, the wireless device (such as a UE or an loT device) is configured with at least two (NZP) CSI-RS resources for channel measurement in a CSI report configuration, wherein each CSI-RS resource comprises several antenna or CSI-RS ports. The first CSI-RS resource is associated with a first (index of a) UE capability parameter / value and the second CSI-RS resource is associated with a first (index of a) UE capability parameter / value, and so on. In some cases, the CSI report comprises information of an association between a CSI-RS resource and a (index of a) UE capability parameter / value. For instance, each CSI may comprise an index or indicator that indicates / points / maps to UE capability parameter / value.

[0299] In some options, each CSI-RS resource is associated with a QCL assumption or TCI state, wherein the QCL assumption(s) or TCI state(s) of the CSI-RS resources are identical or different.

[0300] TCI state per Rx port group

[0301] In certain embodiments, a method performed by a wireless device (such as a UE or an loT device) is provided, the method comprising:

[0302] • receiving from a network node, o a configuration or indication of one or more TCI-State(s) at least for a downlink reception via the PHY-layer or a higher layer, and o a mapping / association of said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or (index / indices of) UE capability parameter(s) / value(s) via the PHY-layer or a higher layer (e.g., RRC or MAC-CE),

[0303] • applying said configuration of indication for the association / mapping of the TCI-State(s).

[0304] In certain embodiments, UE is configured to receive a PDCCH / DCI signaling, MAC-CE message or higher layer configuration (e.g., RRC) that associates / maps T > 1 TCI-State(s) that are configured at least for a downlink reception to 1 < S < T Rx port group(s) or (index / indices of) UE capability parameter(s) / value(s), wherein each TCI-State is mapped to or associated with an Rx port group or (index of a) UE capability parameter / value.

[0305] In certain embodiments, UE is configured to receive a PDCCH / DCI signaling, MAC-CE message or higher layer configuration (e.g., RRC) that associates / maps T > 1 TCI-State(s) that are configured at least for a downlink reception to an Rx port group or (index of) UE capability parameter / value.

[0306] In certain embodiments, a method performed by a wireless device (such as a UE or an loT device) is provided, the method comprising:

[0307] • receiving from a network node, a configuration or indication of one or more TCI-State(s) at least for a downlink reception via the PHY-layer or a higher layer, and

[0308] • mapping / associating said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or (index / indices of) UE capability parameter(s) / value(s). In this case, the mapping / association is performed following fixed rule(s) in the specification. In certain examples, the rule(s) may be specified based on configuration(s) / indication(s) associated with or provided in a PDCCH scheduling one or more downlink receptions of PDSCH. In some options, each TCI-State is mapped to or associated with an Rx port group or (index of a) UE capability parameter / value.

[0309] In certain embodiments, the UE is configured to receive a MAC-CE message that maps one or more TCI-States to a codepoint of a TCI field in a PDCCH / DCI, wherein one or more TCI- State(s) are mapped to a codepoint, and if more than one TCI-State(s) are mapped to a codepoint, each TCI-State is associated with a different Rx port group or (index of a) UE capability parameter / value. For example, a first TCI-State mapped to a codepoint is associated with a first Rx port group or (index of a) UE capability parameter / value and a second TCI-State mapped to a codepoint is associated with a second Rx port group or (index of a) UE capability parameter or value.

[0310] Note that a UE capability parameter / value may be associated with an Rx port group at the wireless device.

[0311] In certain embodiments, the wireless device (such as a UE or an loT device) is configured to

[0312] • receiving from a network node, a PDCCH or DCI indicating at least one TCI state that maps to or is associated with an Rx port group or an (index of) UE capability parameter / value at the wireless device,

[0313] • applying said TCI-State for the reception of one or more ports, codewords or transmission occasions of one or more PDSCHs.

[0314] In certain embodiments, a method performed by a wireless device (such as a UE or an loT device) is provided, the method comprising:

[0315] • receiving from a network node, a configuration or indication of T > 2 TCI-States via the PHY-layer or a higher layer for a downlink reception of one or more PDSCHs, and

[0316] • mapping / associating said at least two TCI-States to T different Rx port groups or T different (indices of) UE capability parameters / values.

[0317] In certain embodiments, a method performed by a wireless device (such as a UE or an loT device) is provided, the method comprising:

[0318] • receiving from a network node, a configuration or indication of T > 1 TCI-States via the PHY-layer or a higher layer,

[0319] • mapping / associating a TCI-State with o a CDM group of DMRS port(s) of a PDSCH, o a codeword of a PDSCH, o a transmission occasion of a PDSCH, or o a repetition / transmission attempt of a PDSCH transport block / codeword.

[0320] In certain embodiments, a method performed by a wireless device (such as a UE or an loT device) is provided, the method comprising:

[0321] • receiving from a network node, a configuration or indication of T > 2 TCI-States via the PHY-layer or a higher layer,

[0322] • mapping / associating a first TCI-State with o a first CDM group of DMRS port(s) of a PDSCH, o a first codeword of a PDSCH, o a first transmission occasion of a PDSCH, or o at least one repetition / transmission attempt of a PDSCH transport block / codeword, and

[0323] • mapping / associating a second TCI-State with o a second CDM group of DMRS port(s) of a PDSCH, o a second codeword of a PDSCH, o a second transmission occasion of a PDSCH, or o at least one repetition / transmission attempt of a PDSCH transport block / codeword other than the one(s) mapped with said first TCI-State, and so on.

[0324] In certain embodiments, the wireless device is configured to receive in a PDCCH / DCI scheduling PDSCH(s), T fields may be present in said PDCCH / DCI wherein the codepoint of each field maps to an Rx port group or (index of) a UE capability parameter / value, a CDM group of DMRS port(s) of a PDSCH (e.g, PDSCH scheduled by said PDCCH / DCI), at least one repetition / transmission attempt of a PDSCH transport block / codeword (e.g, PDSCH scheduled by said PDCCH / DCI), or a codeword of a PDSCH.

[0325] In certain embodiments, the value of a field in a PDCCH / DCI scheduling PDSCH(s) may indicate / determine a mapping / association of said T TCI-State(s) to

[0326] T Rx port group(s) or T (index / indices of) UE capability parameters / values,

[0327] T CDM group(s) of DMRS port(s) of a PDSCH, T different set(s) of repetition(s) / transmission attempt(s) of a PDSCH transport block / codeword wherein each set may comprise at least one repetition / transmission attempt, or

[0328] T codeword(s) of a PDSCH.

[0329] In an example, a value of ‘0’ for said field may associate or map a first TCI-State to an Rx port group, UE capability parameter / value, CDM group, transmission attempt / repetition or codeword of index i and a second TCI-State to an Rx port group, UE capability parameter / value, CDM group, transmission attempt / repetition or codeword of index j. A value of T for said field, on the other hand, may map the first TCI-State to index j and a second TCI- State to index j (in this example, i #= j).

[0330] In some examples, said CDM group(s), repetition(s) / transmission attempt(s) or codeword(s) of PDSCH is / are scheduled / activated by said PDCCH / DCI.

[0331] In certain embodiments, the wireless device is configured to apply for a DM RS port of a PDSCH, a transport block / codeword of a PDSCH, a transmission occasion of a PDSCH, or a transmission attempt / repetition of a PDSCH transport block / codeword, a TCI-State that is associated with said DM RS port, codeword, transmission occasion or transmission attempt / repetition of said PDSCH.

[0332] In certain embodiments, the wireless device is configured to perform an association of T > 2 Rx port groups or T > 2 (indices of) UE capability parameters / values with

[0333] • T PDSCH transport b I ocks / cod ewords scheduled by a PDCCH / DCI,

[0334] • T CDM groups associated with the DM RS ports of a PDSCH scheduled by a PDCCH / DCI, or

[0335] • T PDSCH transmission occasions.

[0336] The association above may be performed with explicit signalling from the network node via the PHY-layer or a higher layer, and / or fixed rule(s) in the specifications.

[0337] In certain embodiments, the wireless device is configured to receive at least two PDCCHs / DCIs, wherein

[0338] • each PDCCH / DCI schedules a PDSCH,

[0339] • the scheduled PDSCHs overlap partially or fully in time and / or frequency, and

[0340] • each PDSCH is associated with a TCI-State that is associated with a different o value of an index / indicator, o Rx port group at the (UE), or o (index of a) UE capability parameter / value.

[0341] In certain embodiments, the wireless device is configured to receive a DM RS port of a PDSCH, a PDSCH transport block / codeword, a PDSCH transmission occasion or a PDSCH transmission attempt / repetition, on an Rx port group or an Rx port group associated via a (index of a) UE capability parameter / value associated with it via an implicit association (for e.g., using fixed rule(s) in the specification) or explicit association from network signaling via the PHY-layer or a higher layer.

[0342] In some examples, the wireless device is also configured to apply the TCI-State mapped / associated with said

[0343] • Rx port group or (index of) UE capability parameter / value,

[0344] • DM RS port of said PDSCH,

[0345] • transport block / codeword of said PDSCH,

[0346] • transmission occasion of said PDSCH, or

[0347] • transmission attempt / repetition of said PDSCH, for said reception.

[0348] In this disclosure, the determination of the Rx port group association may be performed using index / indices / indicator(s) that map to Rx port group(s) or (index / indices of / corresponding to) UE capability parameter(s) / value(s).

[0349] Referring to Figure 5, there is illustrated a method performed by a wireless device (300) according to some of the previously described embodiments. The method is performed by the wireless device (such as a UE or an loT device) (300) comprising at least two receive, Rx, port groups, wherein an Rx port group comprises one or more antenna ports for wireless reception at the wireless device (300). The method comprises:

[0350] • receiving (501) from a network node (400), a configuration for a channel state information, CSI, report,

[0351] • determining (502) based on the configuration for the CSI report configuration, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups,

[0352] • generating (503) a CSI report comprising said one or more CSIs, and

[0353] • reporting (504) or transmitting to the network node (400), the CSI report. The reporting (504) or transmitting to the network node the CSI report may be performed over an uplink, UL, channel.

[0354] In certain embodiments, the total number of Rx antenna ports, N, of the wireless device is an even number and the number of Rx port groups at the wireless device is two such that each Rx port group comprises N / 2 Rx antenna ports.

[0355] In certain embodiments, the method further comprises reporting information related to the Rx port groups and / or number of Rx port groups at the wireless device using a user equipment, UE, capability report.

[0356] In certain embodiments, the method further comprises reporting information regarding multiple sets of downlink, DL, reception layers supported by the wireless device or multiple sets of uplink, UL, ports in an UL resource or UL transmission configuration.

[0357] In certain embodiments, the information is used to infer the number of Rx port groups that the wireless device comprises or supports.

[0358] In certain embodiments, the CSI report comprises at least two CSIs, wherein a first CSI is associated with L_1>1 transmission layers, and a second CSI is associated L_2>1 transmission layers.

[0359] In certain embodiments, wherein when the information comprises G>2 value(s) corresponding to the UL port(s) of an uplink resource, the wireless device comprises G transmit, Tx, port groups and G Rx port groups.

[0360] In certain embodiments, the method further comprises reporting information on transmit, Tx, or uplink antenna ports for uplink transmissions at the wireless device to the network node.

[0361] In certain embodiments, the wireless device is associated with or supports G_T>2 Tx port groups and there is a one-to-one association between an Rx port group and a Tx port group.

[0362] In certain embodiments, a CSI of the one or more CSIs comprises at least a value of a wideband channel quality index, CQI, or a subband CQI.

[0363] In certain embodiments, a CSI of the one or more CSIs is associated with a value or parameter associated with a number of sounding reference signal, SRS, ports of SRS resource(s) or resource set(s) or a number of SRS resources / resource sets, wherein said value or parameter is a UE capability value or parameter. In certain embodiments, a CSI of the one or more CSIs comprises at least a rank indication, Rl, and a channel quality indication, CQI.

[0364] Referring to Figure 6, there is illustrated a method performed by a wireless device (300) according to some of the previously described embodiments. The method is performed by the wireless device (such as a UE or an loT device) (300) for generating and reporting or transmitting a CSI report. The method comprises:

[0365] • receiving (601) from a network node (400), a configuration for a channel state information, CSI, report,

[0366] • determining (602), based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with user equipment, UE, capability information,

[0367] • generating (603) a CSI report comprising said one or more CSIs, and

[0368] • reporting (604) or transmitting to the network node (400), the CSI report.

[0369] In certain embodiments, an association between each of said one or more CSIs and the UE capability information comprises associating each of said one or more CSIs implicitly or explicitly with an index or an indicator that indicates, maps or points to a UE capability value and / or parameter. In this disclosure, the term “parameter / value” means “parameter and / or value” if no specific explanation is given.

[0370] In certain embodiments, said UE capability report comprises information related to at least one of the following UE capability parameters / values: number of layers or a maximum number of layers (e.g., for a downlink / uplink, DL / UL, transmission, for a physical downlink shared channel / physical uplink shared channel, PDSCH / PUSCH, etc.), number of sounding reference signal, SRS, ports or a maximum number of SRS ports, a value of at least two for the number of SRS resource sets or the maximum number of SRS resource sets.

[0371] In certain embodiments, the method further comprises reporting or transmitting to the network node a UE capability report relating to said UE capability information, wherein said UE capability information comprises at least G > 2 UE capability values or parameters.

[0372] In certain embodiments, a first UE capability parameter / value is associated with a first index or index T, a second UE capability parameter / value is associated with a second index or index ‘2’, and so on. In certain embodiments, the method further comprises reporting or transmitting to the network node, the UE capability report, wherein the UE capability report comprises a parameter related to at least one of the following: number of Rx port groups or Rx / Radio Frequency, RF, processing chains at the wireless device, number of SRS resources or SRS resource sets, a maximum number of SRS resources or SRS resource sets, number of PDSCHs / PUSCHs that can be scheduled with partial / full overlap in time and / or frequency, number of possible values of an index / indicator that a CSI can be associated with, number of possible values of an index / indicator that a codeword of a PDSCH / PUSCH can be associated with, number of possible values of an index / indicator that a Code Division Multiplexing, CDM, group of DeModulation Reference Signal, DMRS port(s) of a PDSCH / PUSCH can be associated with, number of possible values of an index / indicator that a downlink control information, DCI, scheduling PUSCH / PDSCH can be associated with.

[0373] In certain embodiments, the CSI report comprises an indicator or index indicating or mapping to: an Rx port group, an index corresponding to a UE capability parameter, or a UE capability parameter / value, that a CSI in the CSI report is associated with.

[0374] In certain embodiments, a CSI comprises at least one indicator indicating a rank or a number of transmission layers, or a number of layers of a precoder indicated by the CSI.

[0375] In certain embodiments, the CSI report comprises a single CSI that is associated with one of the at least two Rx port groups or UE capability value(s) / parameter(s).

[0376] In certain embodiments, the CSI report comprises at least two CSIs, wherein a first CSI is associated with a first Rx port group at the wireless device or a first UE capability parameter / value, and a second CSI is associated with a second Rx port group at the wireless device or a second UE capability parameter / value, and so on. In certain embodiments, for the computation of an j-th CSI, the interference from transmission layer(s) is associated with an j-th CSI, wherein the j-th and j-th CSIs are associated with different Rx port groups or different UE capability parameters / values, and i #= j.

[0377] In certain embodiments, for the computation of a CSI, at least one of the following conditions are met: interference from transmission layer(s) associated with Rx port group(s) or UE capability parameter(s) / value(s) others than the one associated with said CSI is absent, a DL transmission to the wireless device is scheduled only to the Rx port group or the UE capability parameter / value the CSI is associated with.

[0378] In certain embodiments, the CSI report comprises at least three CSIs, wherein a first CSI is associated with a first Rx port group at the wireless device or a first UE capability parameter / value, a second CSI is associated with a second Rx port group at the wireless device or a second UE capability parameter / value, and a third CSI is associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values.

[0379] In certain embodiments,

[0380] • for the computation of the first CSI, the L2> 1 transmission layer(s) associated with the second CSI is / are interference to the > 1 transmission layer(s) associated with the first CSI,

[0381] • for the computation of the second CSI, the > 1 transmission layer(s) associated with the first CSI is / are interference to the L2> 1 transmission layer(s) associated with the second CSI.

[0382] In certain embodiments, for the computation of the third CSI, interference is absent with respect to any layer(s) associated with

[0383] • any Rx port group at the wireless device other than the one associated with the third CSI, or

[0384] • any UE capability parameter / value other than the one associated with the third CSI, or

[0385] • any other CSI.

[0386] In certain embodiments, the CSI report comprises at least four CSIs, and wherein,

[0387] • a first CSI is associated with a first Rx port group at the wireless device, or a first UE capability parameter / value, and a second CSI is associated with a second Rx port group at the wireless device or a second UE capability parameter / value, wherein when the determining the first and second CSI, o the L2transmission layer(s) associated with the second CSI is / are interference to the transmission layer(s) of the first CSI, and o the Li transmission layer(s) associated with the first CSI is / are interference to the L2transmission layer(s) of the second CSI, a third CSI is associated with one of the at least two Rx port groups at the wireless device or one of said at least two UE capability parameters / values, and a fourth CSI is associated with an Rx port group at the wireless device or a UE capability parameter / value different from that of the third CSI, wherein for the determination of the third or fourth CSI, there is no interference with respect to the other Rx port group(s) at the wireless device or other UE capability parameter(s) / value(s).

[0388] In certain embodiments, the CSI report comprises of X' + n CSIs, and wherein

[0389] • when determining a CSI among the X' CSI(s), there is no interference from layers associated with Rx port group(s) or UE capability parameter(s) / value(s) other than the one associated with the CSI of the X' CSI(s), and

[0390] • when determining a CSI of the n CSI(s), there is interference from, o the transmission layer(s) associated with at least one Rx port group or a UE capability parameter / value that is different from that of the one associated with the CSI of the n CSI(s), or o the transmission layer(s) associated with at least one other CSI comprised in the CSI report.

[0391] In certain embodiments, the value of X' is configured or indicated to the UE by the network node, and the value of n is a fixed value or indicated to the UE by the network node.

[0392] In certain embodiments, at least one of the following apply:

[0393] • the value of X' is at least one of the following: {0, 1 , 2, 3, 4},

[0394] • the value of n is at least one of the following: {1 , 2}.

[0395] In certain embodiments, the method further comprises obtaining an indicator indicating one or more Rx port groups or one or more UE capability parameter(s) / value(s) with respect to which CSI(s) is / are to be provided in the CSI report. Referring to Figure 7, there is illustrated a method performed by a wireless device (300) according to some of the previously described embodiments. The method is performed by the wireless device (such as a UE or an loT device) (300), the method comprising: generating (701) a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device, and reporting (702) or transmitting to the network node (400), the UE capability report.

[0396] In some embodiments, information related to two Rx port groups may be of the form of number of layers supported by each Rx port group, number of port(s) configured for each Rx port group, etc. The information related to a number of Rx port groups may be of the form of number of SRS resource sets, number of simultaneous PDSCHs that can be scheduled, etc.

[0397] In certain embodiments, an Rx port group comprises one or more antenna ports for wireless reception at the wireless device.

[0398] In certain embodiments, the UE capability report comprises at least G > 2 values that relate to at least one of the following: a number of layers or a maximum number of layers, a number of SRS resource sets or resources, a maximum number of SRS resource sets or resources, a number of SRS ports for an SRS resource or an SRS resource set, and a maximum number of SRS ports for an SRS resource or an SRS resource set.

[0399] In certain embodiments, the G values indicate the number of Rx port groups at the wireless device and / or each of the G values is associated with an Rx port group at the wireless device.

[0400] In certain embodiments, the UE capability report further comprises a parameter related to at least one of the following: o number of SRS resources or SRS resource sets, o a maximum number of SRS resources or SRS resource sets, o number of PDSCHs / PUSCHs that can be scheduled with partial / full overlap in time and / or frequency, o number of possible values of an index / indicator that a CSI can be associated with, o number of possible values of an index / indicator that a codeword of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a CDM group of DMRS port(s) of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a DCI scheduling PUSCH / PDSCH can be associated with. In certain embodiments, the method further comprises performing an association or a mapping between Z > 1 CDM group(s) of the DM RS ports of a PDSCH and Z Rx port group(s) at the wireless device or Z UE capability parameter(s) / value(s).

[0401] In certain embodiments, the method further comprises one of the following:

[0402] • associating / mapping DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a first Rx port group or a first UE capability parameter / value, and the DMRS / antenna port(s) associated with CDM group T of the PDSCH with a second Rx port group or a second UE capability parameter / value,

[0403] • associating / mapping DMRS / antenna port(s) associated with CDM group ‘1’ of the PDSCH with a first Rx port group or a first UE capability parameter / value, and the DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a second Rx port group or a second UE capability parameter / value.

[0404] In certain embodiments, the method further comprises one of the following:

[0405] • associating / mapping a first codeword / transport block of the PDSCH with a first Rx port group or a first UE capability parameter / value, and a second codeword / transport block of the PDSCH with a second Rx port group or a second UE capability parameter / value,

[0406] • associating / mapping of a second codeword / transport block of the PDSCH with a first Rx port group or a first UE capability parameter / value, and a first codeword / transport block of the PDSCH with a second Rx port group or a second UE capability parameter / value.

[0407] In certain embodiments, the method further comprises associating / mapping a PDSCH with an Rx port group or a UE capability parameter / value wherein said associating / mapping is determined by at least one of the following:

[0408] • an indication on a physical downlink control channel / downlink control information, PDCCH / DCI, scheduling said PDSCH,

[0409] • a parameter or configuration associated with a PDCCH / DCI scheduling said PDSCH,

[0410] • pre-determined rule(s).

[0411] In some embodiments, the pre-determined rule(s) may be specified in the NR specifications.

[0412] In certain embodiments, the method further comprises receiving at least two PDCCHs / DCIs, wherein

[0413] • each PDCCH / DCI schedules a PDSCH and is associated with a different value of an index or an indicator, • the scheduled PDSCHs overlap partially or fully in time and / or frequency, and

[0414] • a PDSCH scheduled by a first PDCCH / DCI is associated with a first Rx port group or a first UE capability parameter / value, and a PDSCH scheduled by a second PDCCH / DCI is associated with a second Rx port group or a second UE capability parameter or value, and so on.

[0415] In certain embodiments, said first PDCCH / DCI is associated with a first value of said index or indicator (e.g., ‘0’) and said second PDCCH / DCI is associated with a second value of said index or indicator (e.g., T), and so on, and wherein

[0416] • an index or indicator is provided in a field of said PDCCHs or DCIs to indicate / perform said association(s), or

[0417] • an index or indicator is configured via a higher layer for said PDCCHs or DCIs (for example, it is provided in the configuration of the search space or Control Resource Set, CORESET, associated with said PDCCH or DCI) to indicate / perform said association(s).

[0418] In certain embodiments, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator in a field of one of the said PDCCHs / DCIs is different from the value of said index or indicator in said field of any of the other said PDCCHs / DCIs.

[0419] In certain embodiments, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator associated via a higher layer with said PDCCHs / DCIs is different from the value of said index or indicator associated via a higher layer with any of the other said PDCCHs / DCIs (for e.g., a CORESET pool index configured for the CORESET associated with a PDCCH / DCI).

[0420] In certain embodiments, said at least two PDCCHs / DCIs are associated with different CDM groups of DM RS port(s) of PDSCH.

[0421] In certain embodiments, the method further comprises: receiving a PDSCH, one or more DMRS ports of a PDSCH, or a codeword of a PDSCH on one or more antenna port(s) of an Rx port group associated with a UE capability parameter / value, that is / are associated implicitly (e.g., via fixed rule(s) in the specification) or explicitly (e.g., by network node signaling via the PHY- and / or higher layer) with said PDSCH, or DMRS port(s) of said PDSCH or codeword of said PDSCH. In certain embodiments, the method further comprises:

[0422] • receiving from a network node, o a configuration or indication of one or more Transmission Configuration Indication-State(s), TCI-State(s), at least for a downlink reception via the PHY- layer or a higher layer, and o a mapping / association of said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or UE capability parameter(s) / value(s) via the PHY-layer or a higher layer (e.g., Radio Resource Control, RRC, or Medium Access Control-Control Element, MAC-CE),

[0423] • applying said configuration of indication for the association / mapping of the TCI- State(s).

[0424] In certain embodiments, the method further comprises: receiving a PDCCH / DCI signaling, MAC-CE message or higher layer configuration (e.g., RRC) that associates / maps T > 1 TCI- State(s) that are configured at least for a downlink reception to 1 < S < T Rx port group(s) or UE capability parameter(s) / value(s), wherein each TCI-State is mapped to or associated with an Rx port group or a UE capability parameter / value.

[0425] In certain embodiments, the method further comprises:

[0426] • receiving from a network node, a configuration or indication of one or more TCI-State(s) at least for a downlink reception via the PHY-layer or a higher layer, and

[0427] • mapping / associating said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or UE capability parameter(s) / value(s), wherein each TCI-State is mapped to or associated with an Rx port group or a UE capability parameter / value.

[0428] In certain embodiments, the method further comprises: receiving a MAC-CE message that maps one or more TCI-States to a codepoint of a TCI field in a PDCCH / DCI, wherein one or more TCI-State(s) are mapped to a codepoint, and if more than one TCI-State(s) are mapped to a codepoint, a first TCI-State mapped to a codepoint is associated with a first Rx port group or a UE capability parameter / value, and a second TCI-State mapped to a codepoint is associated with a second Rx port group or a UE capability parameter or value, and so on.

[0429] In certain embodiments, the method further comprises receiving from a network node, a configuration or indication of T > 2 TCI-States via the PHY-layer or a higher layer,

[0430] • mapping / associating a first TCI-State with at least one of the following: o a first CDM group of DM RS port(s) of a PDSCH, o a first codeword of a PDSCH, o a first transmission occasion of a PDSCH, o at least one repetition / transmission attempt of a PDSCH transport block / codeword, and

[0431] • mapping / associating a second TCI-State with at least one of the following: o a second CDM group of DM RS port(s) of a PDSCH, o a second codeword of a PDSCH, o a second transmission occasion of a PDSCH, or o at least one repetition / transmission attempt of a PDSCH transport block / codeword other than the one(s) mapped with said first TCI-State, and so on.

[0432] In certain embodiments, the value of a field in a PDCCH / DCI scheduling PDSCH(s) or a fixed rule in the specifications indicates / determines a mapping / association of said T TCI-State(s) to at least one of the following:

[0433] • T Rx port group(s) or T UE capability parameters / values,

[0434] • T CDM group(s) of DMRS port(s) of a PDSCH,

[0435] • T different set(s) of repetition(s) / transmission attempt(s) of a PDSCH transport block / codeword wherein each set may comprise at least one repetition / transmission attempt, and

[0436] • T codeword(s) of a PDSCH.

[0437] In certain embodiments, the method further comprises: receiving at least two PDCCHs / DCIs, wherein

[0438] • each PDCCH / DCI schedules a PDSCH,

[0439] • the scheduled PDSCHs overlap partially or fully in time and / or frequency, and

[0440] • each PDSCH is associated with a TCI-State that is associated with a different o value of an index / indicator, o Rx port group at the wireless device, or o UE capability parameter / value.

[0441] In certain embodiments, the method further comprises applying to

[0442] • a DMRS port of a PDSCH,

[0443] • a transport block / codeword of a PDSCH,

[0444] • a transmission occasion of a PDSCH, or

[0445] • a transmission attempt / repetition of a PDSCH transport block / codeword, a TCI-State that is associated with said DMRS port, codeword, transmission occasion or transmission attempt / repetition of said PDSCH.

[0446] In certain embodiments, the method further comprises receiving at least one of the following:

[0447] • a DMRS port of a PDSCH,

[0448] • a PDSCH transport block / codeword,

[0449] • a PDSCH transmission occasion, or

[0450] • a PDSCH transmission attempt / repetition, on an Rx port group associated via a UE capability parameter / value, wherein the association is either via an implicit association (e.g., using fixed rule(s) in the specification), or an explicit association from network signaling via the PHY-layer or a higher layer.

[0451] In order to perform the previously described process or method steps performed by the wireless device, there is also provided a wireless device. Figure 3 illustrates a simplified block diagram depicting a wireless device (such as a UE or an loT device) 300. The wireless device 300 comprises a processor 310 or processing circuit or a processing module or a processor means 310; a receiver circuit or receiver module 340; a transmitter circuit or transmitter module 350; a memory module 320, a transceiver circuit or transceiver module 330 which may include the transmitter circuit 350 and the receiver circuit 340. The wireless device 300 further comprises an antenna system 360 which includes antenna circuitry for transmitting and receiving signals to / from at least the network node or other wireless device(s). The antenna system employs beamforming as previously described.

[0452] The wireless device 300 may belong to any radio access technology including 4G or LTE, LTE- A, 5G, advanced 5G or a combination thereof that support beamforming technology. The wireless device comprising the processor and the memory contains instructions executable by the processor, whereby the wireless device 300 is operative or is configured to perform any one of the embodiments related to the wireless device as previously described. In some embodiments, the wireless device 300 may be a UE or an loT device.

[0453] The processing module / circuit 310 includes a processor, microprocessor, an application specific integrated circuit (ASIC), field programmable gate array (FPGA), or the like, and may be referred to as the “processor.” The processor 310 controls the operation of the wireless device and its components. Memory (circuit or module) 320 includes a random-access memory (RAM), a read only memory (ROM), and / or another type of memory to store data and instructions that may be used by processor 310. In general, it will be understood that the wireless device 700 in one or more embodiments includes fixed or programmed circuitry that is configured to carry out the operations in any of the embodiments disclosed herein. In at least one such example, the processor 310 includes a microprocessor, microcontroller, DSP, ASIC, FPGA, or other processing circuitry that is configured to execute computer program instructions from a computer program stored in a non-transitory computer-readable medium that is in or is accessible to the processing circuitry. Here, “non-transitory” does not necessarily mean permanent or unchanging storage, and may include storage in working or volatile memory, but the term does connote storage of at least some persistence. The execution of the program instructions specially adapts or configures the processing circuitry to carry out the operations disclosed in this disclosure relating to the wireless device. Further, it will be appreciated that the wireless device 300 may comprise additional components.

[0454] The wireless device 300 by means of processor 310 executes instructions contained in the memory 320 whereby the wireless device is operative to perform any one of the previously described embodiments related to the actions performed by the wireless device, some of which are presented in appended claims.

[0455] There is also provided a computer program comprising instructions which when executed by the processor 310 of the wireless device cause the processor 310 to carry out the method according to any one of the previously described embodiments.

[0456] Referring to Figure 8, there is illustrated a method performed by a network node (400) according to some of the previously described embodiments. The method performed by the network node (400) is used for receiving a CSI report from a wireless device (300) (such as a UE or an loT device) comprising at least two receive, Rx, port groups, wherein an Rx port group comprises one or more antenna ports for wireless reception at the wireless device. The method comprises:

[0457] • transmitting (801), to a wireless device, a configuration for a channel state information, CSI, report, for enabling the wireless device to: o determine, based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups, o generate a CSI report comprising said one or more CSIs, and

[0458] • receiving (802), from the wireless device (300) (such as a UE), an uplink control information, UCI, including the CSI report over an uplink, UL, channel.

[0459] Referring to Figure 9, there is illustrated a method performed by a network node (400) according to some of the previously described embodiments. The method comprising:

[0460] • transmitting (901), to a wireless device, a configuration for a channel state information, CSI, report, for enabling the wireless device to: o determine, based on the configuration for the CSI report, one or more CSIs, wherein each CSI is associated with UE capability information, o generate a CSI report comprising said one or more CSIs, and

[0461] • receiving (902), from the wireless device, an uplink control information, UCI, including the CSI report over an uplink, UL, channel.

[0462] In the present invention, a CSI report may be used interchangeably with a CSI feedback report.

[0463] Referring to Figure 10, there is illustrated a method performed by a network node (400) for receiving, from a wireless device, a UE capability report in a wireless communication system, according to some of the previously described embodiments. The method comprises:

[0464] • receiving (1001) from the wireless device (300), a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device.

[0465] In some embodiments, information related to two Rx port groups may be of the form of number of layers supported by each Rx port group, number of port(s) configured for each Rx port group, etc. The information related to a number of Rx port groups may be of the form of number of SRS resource sets, number of simultaneous PDSCHs that can be scheduled, etc.

[0466] In order to perform the previously described process or method steps performed by the network node there is also provided a network node. Figure 4 illustrates a block diagram depicting a network node 400. The network node 400 comprises a processor 410 or processing circuit or a processing module or a processor means 410; a receiver circuit or receiver module 440; a transmitter circuit or transmitter module 450; a memory module 420, a transceiver circuit or transceiver module 430 which may include the transmitter circuit 450 and the receiver circuit 440. The network node 400 further comprises an antenna system 460 which includes antenna circuitry for transmitting and receiving signals to / from at least the wireless device. The antenna system employs beamforming as previously described. The network node 400 may belong to any radio access technology including 4G or LTE, LTE- A, 5G, advanced 5G or a combination thereof that support beamforming technology. The network device comprising the processor and the memory contains instructions executable by the processor, whereby the network node 400 is operative or is configured to perform any one of the embodiments related to the network node 400 as previously described. In some embodiments, the network node is a gNB.

[0467] The processing module / circuit 410 includes a processor, microprocessor, an application specific integrated circuit (ASIC), field programmable gate array (FPGA), or the like, and may be referred to as the “processor.” The processor 410 controls the operation of the network node and its components. Memory (circuit or module) 420 includes a random-access memory (RAM), a read only memory (ROM), and / or another type of memory to store data and instructions that may be used by processor 410. In general, it will be understood that the network node in one or more embodiments includes fixed or programmed circuitry that is configured to carry out the operations in any of the embodiments disclosed herein.

[0468] In at least one such example, the processor 410 includes a microprocessor, microcontroller, DSP, ASIC, FPGA, or other processing circuitry that is configured to execute computer program instructions from a computer program stored in a non-transitory computer-readable medium that is in or is accessible to the processing circuitry. Here, “non-transitory” does not necessarily mean permanent or unchanging storage, and may include storage in working or volatile memory, but the term does connote storage of at least some persistence. The execution of the program instructions specially adapts or configures the processing circuitry to carry out the operations disclosed in this disclosure relating to the wireless device. Further, it will be appreciated that the wireless device 400 may comprise additional components. The network node 400 may also be viewed as a Transmitter and Receiver Point (TRP).

[0469] The network node 400 by means of processor 410 executes instructions contained in the memory 420 whereby the network node 400 is operative to perform any one of the previously described embodiments related to the actions performed by the network node.

[0470] There is also provided a computer program comprising instructions which when executed by the processor 410 of the network node cause the processor 410 to carry out the method according to some embodiments.

[0471] Several advantages of the described embodiments in this disclosure are achieved as described above which include new modes of wireless device operation and use-cases of network scheduling while either reusing / exploiting existing information from the wireless device or setting up new reporting quantities from the wireless device.

[0472] Reference throughout this specification to “an example” or “exemplary” means that a particular feature, structure, or characteristic described in connection with the example is included in at least one embodiment of the present technology. Thus, appearances of the phrases “in an example” or the word “exemplary” in various places throughout this specification are not necessarily all referring to the same embodiment.

[0473] Throughout this disclosure, the word "comprise" or “comprising” has been used in a nonlimiting sense, i.e. meaning "consist at least of". Although specific terms may be employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. The embodiments herein may be applied in any wireless systems including LTE or 4G, LTE-A (or LTE-Advanced), 5G, advanced 5G, WiMAX, WiFi, satellite communications, TV broadcasting etc.

Claims

CLAIMS1. A method performed by a wireless device (300) comprising at least two receive, Rx, port groups, wherein each of said at least two Rx port groups comprises one or more antenna ports for wireless reception at the wireless device, the method comprising:• receiving (501) from a network node (400), a configuration for a channel state information, CSI, report,• determining (502), based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups,• generating (503) a CSI report comprising said one or more CSIs, and• reporting (504) or transmitting to the network node, the CSI report.

2. The method of claim 1 , wherein the total number of Rx antenna ports, N, of the wireless device is an even number and the number of Rx port groups at the wireless device is two such that each Rx port group comprises N / 2 Rx antenna ports.

3. The method of claim 1 or 2, further comprising reporting information related to the Rx port groups and / or number of Rx port groups at the wireless device using a user equipment, UE, capability report.

4. The method of any of claims 1 to 3, further comprising reporting information regarding multiple sets of downlink, DL, reception layers supported by the wireless device or multiple sets of uplink, UL, ports in an UL resource or UL transmission configuration.

5. The method of claim 4, wherein the information is used to infer the number of Rx port groups that the wireless device comprises or supports.

6. The method of any of claims 1 to 5, wherein the CSI report comprises at least two CSIs, wherein a first CSI is associated with> 1 transmission layers, and a second CSI is associated L2> 1 transmission layers.

7. The method of claim 4, wherein when the information comprises G > 2 value(s) corresponding to the UL port(s) of an uplink resource, the wireless device comprises G transmit, Tx, port groups and G Rx port groups.

8. The method of any of claims 1 to 7, further comprising reporting information on transmit, Tx, or uplink antenna ports for uplink transmissions at the wireless device to the network node.

9. The method of any of claims 1 to 8, wherein the wireless device is associated with or supports GT> 2 Tx port groups and there is a one-to-one association between an Rx port group and a Tx port group.

10. The method of any of claims 1 to 9, wherein a CSI of the one or more CSIs comprises at least a value of a wideband channel quality index, CQI, or a subband CQI.11 . The method of any of claims 1 to 10, wherein a CSI of the one or more CSIs is associated with a value or parameter associated with a number of sounding reference signal, SRS, ports of SRS resource(s) or resource set(s) or a number of SRS resources / resource sets, wherein said value or parameter is a UE capability value or parameter.

12. The method of any of claims 1 to 11 , wherein a CSI of the one or more CSIs comprises at least a rank indication, Rl, and a channel quality indication, CQI.

13. The method of claim 3, wherein said UE capability report comprises information related to at least one of the following UE capability parameters / values:• number of layers or a maximum number of layers (e.g., for a downlink / uplink, DL / UL, transmission, for a physical downlink shared channel / physical uplink shared channel, PDSCH / PUSCH, etc.),• number of sounding reference signal, SRS, ports or a maximum number of SRS ports,• a value of at least two for the number of SRS resource sets or the maximum number of SRS resource sets.

14. The method of claim 3, further comprising reporting or transmitting to the network node, the UE capability report, wherein the UE capability report comprises a parameter related to at least one of the following: o number of Rx port groups or Rx / Radio Frequency, RF, processing chains at the wireless device, o number of SRS resources or SRS resource sets, o a maximum number of SRS resources or SRS resource sets, o number of PDSCHs / PUSCHs that can be scheduled with partial / full overlap in time and / or frequency,o number of possible values of an index / indicator that a CSI can be associated with, o number of possible values of an index / indicator that a codeword of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a Code Division Multiplexing, CDM, group of DeModulation Reference Signal, DMRS, port(s) of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a downlink control information, DCI, scheduling PUSCH / PDSCH can be associated with.

15. The method of any one of the preceding claims, wherein the CSI report comprises an indicator or index indicating or mapping to• an Rx port group,• an index corresponding to a UE capability parameter, or• a UE capability parameter / value, that a CSI in the CSI report is associated with.

16. The method of any one of the preceding claims, wherein a CSI comprises at least one indicator indicating a rank or a number of transmission layers, or a number of layers of a precoder indicated by the CSI.

17. The method of any one of the preceding claims, wherein the CSI report comprises at least two CSIs, wherein a first CSI is associated with a first Rx port group at the wireless device or a first UE capability parameter / value, and a second CSI is associated with a second Rx port group at the wireless device or a second UE capability parameter / value, and so on.

18. The method of claim 17, wherein for the computation of an j-th CSI, the interference from transmission layer(s) is associated with an j-th CSI, wherein the j-th and j-th CSIs are associated with different Rx port groups or different UE capability parameters / values, and i j-19. The method of claim 17, wherein for the computation of a CSI, at least one of the following conditions are met:• interference from transmission layer(s) associated with Rx port group(s) or UE capability parameter(s) / value(s) others than the one associated with said CSI is absent,• a DL transmission to the wireless device is scheduled only to the Rx port group or the UE capability parameter / value the CSI is associated with.

20. The method of any one of the preceding claims, wherein the CSI report comprises X' + n CSIs, and wherein• when determining a CSI among the X' CSI(s), there is no interference from layers associated with Rx port group(s) or UE capability parameter(s) / value(s) other than the one associated with the CSI of the X' CSI(s), and• when determining a CSI of the n CSI(s), there is interference from, o the transmission layer(s) associated with at least one Rx port group or a UE capability parameter / value that is different from that of the one associated with the CSI of the n CSI(s), or o the transmission layer(s) associated with at least one other CSI comprised in the CSI report.21 . The method of claim 20 wherein, the value of X' is configured or indicated to the UE by the network node, and the value of n is a fixed value or indicated to the UE by the network node.

22. The method of claim 20 or 21 wherein, at least one of the following apply:• the value of X' is at least one of the following: {0, 1 , 2, 3, 4},• the value of n is at least one of the following: {1 , 2}.

23. The method of any one of the preceding claims, further comprising obtaining an indicator indicating one or more Rx port groups or one or more UE capability parameter(s) / value(s) with respect to which CSI(s) is / are to be provided in the CSI report.

24. A method performed by a wireless device, the method comprising generating (701) a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device, and reporting (702) or transmitting to a network node (400) the UE capability report.

25. The method of claim 24, wherein an Rx port group comprises one or more antenna ports for wireless reception at the wireless device.

26. The method of claim 3 or 24, wherein the UE capability report comprises at least G > 2 values that relate to at least one of the following: a number of layers or a maximum number of layers, a number of SRS resource sets or resources, a maximum number of SRS resource sets or resources, a number of SRS ports for an SRS resource or an SRSresource set, and a maximum number of SRS ports for an SRS resource or an SRS resource set.

27. The method of claim 26, wherein the G values indicate the number of Rx port groups at the wireless device and / or each of the G values is associated with an Rx port group at the wireless device.

28. The method according to claim 3 or 24-27, wherein the UE capability report further comprises a parameter related to at least one of the following: o number of SRS resources or SRS resource sets, o a maximum number of SRS resources or SRS resource sets, o number of PDSCHs / PUSCHs that can be scheduled with partial / full overlap in time and / or frequency, o number of possible values of an index / indicator that a CSI can be associated with, o number of possible values of an index / indicator that a codeword of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a CDM group of DMRS port(s) of a PDSCH / PUSCH can be associated with, o number of possible values of an index / indicator that a DCI scheduling PUSCH / PDSCH can be associated with.

29. The method according to any one of the preceding claims, further comprising: performing an association or a mapping between Z > 1 CDM group(s) of the DMRS ports of a PDSCH and Z Rx port group(s) at the wireless device or Z UE capability parameter(s) / value(s).

30. The method according to claim 29, further comprising one of the following:• associating / mapping DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a first Rx port group or a first UE capability parameter / value, and the DMRS / antenna port(s) associated with CDM group T of the PDSCH with a second Rx port group or a second UE capability parameter / value,• associating / mapping DMRS / antenna port(s) associated with CDM group T of the PDSCH with a first Rx port group or a first UE capability parameter / value, and the DMRS / antenna port(s) associated with CDM group ‘0’ of the PDSCH with a second Rx port group or a second UE capability parameter / value.

31. The method according to any one of the preceding claims, further comprising one of the following:• associating / mapping a first codeword / transport block of the PDSCH with a first Rx port group or a first UE capability parameter / value, and a second codeword / transport block of the PDSCH with a second Rx port group or a second UE capability parameter / value,• associating / mapping of a second codeword / transport block of the PDSCH with a first Rx port group or a first UE capability parameter / value, and a first codeword / transport block of the PDSCH with a second Rx port group or a second UE capability parameter / value.

32. The method according to any one of the preceding claims, further comprising: associating / mapping a PDSCH with an Rx port group or a UE capability parameter / value wherein said associating / mapping is determined by at least one of the following:• an indication on a physical downlink control channel / downlink control information, PDCCH / DCI, scheduling said PDSCH,• a parameter or configuration associated with a PDCCH / DCI scheduling said PDSCH,• pre-determined rule(s).

33. The method according to claim 32, further comprising receiving at least two PDCCHs / DCIs, wherein• each PDCCH / DCI schedules a PDSCH and is associated with a different value of an index or an indicator,• the scheduled PDSCHs overlap partially or fully in time and / or frequency, and• a PDSCH scheduled by a first PDCCH / DCI is associated with a first Rx port group or a first UE capability parameter / value, and a PDSCH scheduled by a second PDCCH / DCI is associated with a second Rx port group or a second UE capability parameter or value, and so on.

34. The method according to claim 33, wherein said first PDCCH / DCI is associated with a first value of said index or indicator (e.g., ‘0’) and said second PDCCH / DCI is associated with a second value of said index or indicator (e.g., T), and so on, and wherein• an index or indicator is provided in a field of said PDCCHs or DCIs to indicate / perform said association(s), or• an index or indicator is configured via a higher layer for said PDCCHs or DCIs (for example, it is provided in the configuration of the search space or Control Resource Set, CORESET, associated with said PDCCH or DCI) to indicate / perform said association(s).

35. The methods according to claim 33 or 34 wherein, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator in a field of one of the said PDCCHs / DCIs is different from the value of said index or indicator in said field of any of the other said PDCCHs / DCIs.

36. The methods according to claim 33 or 34 wherein, said at least two PDCCHs / DCIs are received on the same CORESET or different CORESETs and a value of an index or indicator associated via a higher layer with said PDCCHs / DCIs is different from the value of said index or indicator associated via a higher layer with any of the other said PDCCHs / DCIs (for e.g., a CORESET pool index configured for the CORESET associated with a PDCCH / DCI).

37. The methods according to any one of claims 33-36 wherein, said at least two PDCCHs / DCIs are associated with different CDM groups of DMRS port(s) of PDSCH.

38. The method according to any one of the preceding claims, further comprising: receiving a PDSCH, one or more DMRS ports of a PDSCH, or a codeword of a PDSCH on one or more antenna port(s) of an Rx port group associated with a UE capability parameter / value, that is / are associated implicitly (e.g., via fixed rule(s) in the specification) or explicitly (e.g., by network node signaling via the PHY- and / or higher layer) with said PDSCH, or DMRS port(s) of said PDSCH or codeword of said PDSCH.

39. The method according to any one of the preceding claims, further comprising:• receiving from a network node, o a configuration or indication of one or more Transmission Configuration Indication-State(s), TCI-State(s), at least for a downlink reception via the PHY- layer or a higher layer, and o a mapping / association of said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or UE capability parameter(s) / value(s) via the PHY-layer or a higher layer (e.g., Radio Resource Control, RRC, or Medium Access Control-Control Element, MAC-CE),• applying said configuration of indication for the association / mapping of the TCI- State(s).

40. The method according to claim 39, further comprising: receiving a PDCCH / DCI signaling, Medium Access Control-Control Element, MAC-CE, message or higher layer configuration (e.g., RRC) that associates / maps T > 1 TCI-State(s) that are configured at least for adownlink reception to 1 < S < T Rx port group(s) or UE capability parameter(s) / value(s), wherein each TCI-State is mapped to or associated with an Rx port group ora UE capability parameter / value.41 . . The method according to any one of the preceding claims, further comprising:• receiving from a network node, a configuration or indication of one or more TCI-State(s) at least for a downlink reception via the PHY-layer or a higher layer, and• mapping / associating said one or more TCI-State(s) to one or more Rx port group(s) at the wireless device or UE capability parameter(s) / value(s), wherein each TCI-State is mapped to or associated with an Rx port group or a UE capability parameter / value.

42. The method according to any one of the preceding claims, further comprising: receiving a MAC-CE message that maps one or more TCI-States to a codepoint of a TCI field in a PDCCH / DCI, wherein one or more TCI-State(s) are mapped to a codepoint, and if more than one TCI-State(s) are mapped to a codepoint, a first TCI-State mapped to a codepoint is associated with a first Rx port group or a UE capability parameter / value, and a second TCI-State mapped to a codepoint is associated with a second Rx port group or a UE capability parameter or value, and so on.

43. The method according to any one of the preceding claims, further comprising:• receiving from a network node, a configuration or indication of T > 2 TCI-States via the PHY-layer or a higher layer,• mapping / associating a first TCI-State with at least one of the following: o a first CDM group of DM RS port(s) of a PDSCH, o a first codeword of a PDSCH, o a first transmission occasion of a PDSCH, o at least one repetition / transmission attempt of a PDSCH transport block / codeword, and• mapping / associating a second TCI-State with at least one of the following: o a second CDM group of DM RS port(s) of a PDSCH, o a second codeword of a PDSCH, o a second transmission occasion of a PDSCH, or o at least one repetition / transmission attempt of a PDSCH transport block / codeword other than the one(s) mapped with said first TCI-State, and so on.

44. The method according to claim 43, wherein the value of a field in a PDCCH / DCI scheduling PDSCH(s) or a fixed rule in the specifications indicates / determines a mapping / association of said T TCI-State(s) to at least one of the following:• T Rx port group(s) or T UE capability parameters / values,• T CDM group(s) of DMRS port(s) of a PDSCH,• T different set(s) of repetition(s) / transmission attempt(s) of a PDSCH transport block / codeword wherein each set may comprise at least one repetition / transmission attempt, and• T codeword(s) of a PDSCH.

45. The method according to any one of the preceding claims, further comprising: receiving at least two PDCCHs / DCIs, wherein• each PDCCH / DCI schedules a PDSCH,• the scheduled PDSCHs overlap partially or fully in time and / or frequency, and• each PDSCH is associated with a TCI-State that is associated with a different o value of an index / indicator, o Rx port group at the wireless device, or o UE capability parameter / value.

46. The method according to any of the preceding claims, further comprising applying to• a DMRS port of a PDSCH,• a transport block / codeword of a PDSCH,• a transmission occasion of a PDSCH, or• a transmission attempt / repetition of a PDSCH transport block / codeword, a TCI-State that is associated with said DMRS port, codeword, transmission occasion or transmission attempt / repetition of said PDSCH.

47. The method according to any one of the preceding claims, further comprising receiving at least one of the following:• a DMRS port of a PDSCH,• a PDSCH transport block / codeword,• a PDSCH transmission occasion, or• a PDSCH transmission attempt / repetition, on an Rx port group associated via a UE capability parameter / value, wherein the association is either via an implicit association (e.g., using fixed rule(s) in the specification), or an explicit association from network signaling via the PHY-layer or a higher layer.

48. A method performed by a network node (400), for receiving a channel state information, CSI, report from a wireless device comprising at least two receive, Rx, port groups, wherein an Rx port group comprises one or more antenna ports for wireless reception at the wireless device, the method comprising:• transmitting (801), to a wireless device (300), a configuration for a channel state information, CSI, report, for enabling the wireless device to: o determine, based on the configuration for the CSI report, one or more CSIs, wherein each of said one or more CSIs is associated with an Rx port group among said at least two Rx port groups, o generate a CSI report comprising said one or more CSIs, and• receiving (802), from the wireless device (300), an uplink control information, UCI, including the CSI report over an uplink, UL, channel.

49. A method performed by a network node (400), for receiving, from a wireless device (300), a UE capability report in a wireless communication system, the method comprising: receiving (1001) from the wireless device (300), a UE capability report, wherein the UE capability report comprises information relating to at least two receive, Rx, port groups or a number of Rx port groups of the wireless device.

50. A network node (400) comprising a processor (410) and a memory (420) containing instructions executable by said processor (410), whereby the network node (400) is operative to perform the method according to any of claims 48-49.

51. The network node (400) according to claim 50, where the network node is a gNB.

52. A wireless device (300) comprising a processor (310) and a memory (320) containing instructions executable by said processor (310), whereby the wireless device (300) is operative to perform the method according to any of claims 1-47.

53. The wireless device according to claim 52, wherein the wireless device is a UE.

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