Transmit parameter selection based on reported interference for ipn

Abstract

A UE receives dynamic indication of which physical resource(s) and which antenna port(s) associated with the physical resource(s) should be measured for IpN measurement. The dynamically indicated physical resource(s) and associated antenna port(s) correspond to a PDSCH transmission and / or associated DMRSs. The UE receives a first DCI having a trigger for reporting of a result of the IpN measurement. The UE receives a downlink channel including the DMRSs for the IpN measurement, and performs the IpN measurement based on the indicated physical resource(s) and the associated antenna port(s), and reports a result of IpN calculation that is based on the IpN measurement. A network node sends the dynamic indication and the first DCI, and receives the report. The network node selects transmit parameter(s) based on the report.

Description

TRANSMIT PARAMETER SELECTION BASED ON REPORTED INTERFERENCE FOR IPN CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority from, and the benefit of, US Provisional Application No.63 / 754644, filed February 6, 2025, the contents of which are hereby incorporated by reference in their entirety.TECHNICAL FIELD

[0002] Examples of embodiments herein relate generally to wireless communications and, more specifically, relate to parameters used for transmission based on information for interference plus noise (IpN).BACKGROUND

[0003] In typical TDD (time division duplex) operations, it is assumed that there is UL(uplink)-DL (downlink) channel reciprocity, meaning that the channel is approximately the same in UL and DL. UL is from a UE, user equipment, a wireless and typically mobile device, to a network, and DL is from the network to the UE. This allows a gNB (e.g., an entity providing access by the UE to the network) to calculate precoders for PDSCH (physical downlink shared channel) from SRS (sounding reference signal) estimation of the DL channel. That is, the UE sends SRSs to the gNB, and this provides an estimation of the UL channel. Because the UL and DL channels are assumed to be reciprocal, the gNB can use the SRS for estimation of the DL channel and, from this estimation, determine precoders that are to be applied to the data for the antennas to be used for PDSCH transmissions.

[0004] While this has benefits, the interference plus noise (IpN), which is a factor in determining a transmission rank, modulation and coding scheme, is not symmetrical in both UL and DL. That is, the IpN for the UL is not the same for the IpN for DL, and this can lead to issues in DL communications, such as for link adaptation or PDSCH precoding for multi-user MIMO transmissions. This could be improved.BRIEF SUMMARY

[0005] This section is intended to include examples and is not intended to be limiting.

[0006] In an example, a method is disclosed that includes receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured forinterference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0007] An additional example includes a computer program, comprising instructions for performing the method of the previous paragraph, when the computer program is run on an apparatus. The computer program according to this paragraph, wherein the computer program is a computer program product comprising a computer-readable medium bearing the instructions embodied therein for use with the apparatus. Another example is the computer program according to this paragraph, wherein the program is directly loadable into an internal memory of the apparatus.

[0008] An example of an apparatus includes one or more processors and one or more memories storing instructions that, when executed by the one or more processors, cause the apparatus at least to perform: receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0009] An example of a computer program product includes a computer-readable storage medium bearing instructions that, when executed by an apparatus, cause the apparatus to perform at least the following: receiving, by a user equipment from a network node, dynamic indication of which of oneor more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0010] In another example, an apparatus comprises means for: receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0011] In an example, a method is disclosed that includes sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement;receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0012] An additional example includes a computer program, comprising instructions for performing the method of the previous paragraph, when the computer program is run on an apparatus. The computer program according to this paragraph, wherein the computer program is a computer program product comprising a computer-readable medium bearing the instructions embodied therein for use with the apparatus. Another example is the computer program according to this paragraph, wherein the program is directly loadable into an internal memory of the apparatus.

[0013] An example of an apparatus includes one or more processors and one or more memories storing instructions that, when executed by the one or more processors, cause the apparatus at least to perform: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0014] An example of a computer program product includes a computer-readable storage medium bearing instructions that, when executed by an apparatus, cause the apparatus to perform at least the following: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result ofthe IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0015] In another example, an apparatus comprises means for: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings use reference numerals, where the same reference numerals may be used to refer to like parts throughout, but parts having the same reference numeral can differ in operation and components. In the attached drawings:

[0017] FIG. 1 illustrates a signaling diagram and associated information providing an overview of examples of enhanced link adaption;

[0018] FIG. 2 illustrates a signaling diagram for measurement and reporting of an IpN report using DMRS resources;

[0019] FIG. 3 illustrates an example of a time relationship between DCIs, DMRS, PDSCH and PUSCH transmission with a link between the IpN report and the DMRS resource and ports to be measured established by the trigger state;

[0020] FIG. 4 illustrates a signaling diagram for measurement and reporting of an IpN report using CSI-RS resources;

[0021] FIG. 5 is a logic flow diagram using DMRS for transmit parameter selection based on reported values of interference for IpN, which is performed by a UE;

[0022] FIG. 6 is a logic flow diagram using DMRS for transmit parameter selection based on reported values of interference for IpN, which is performed by a network node; and

[0023] FIG. 7 is a block diagram of one possible and non-limiting exemplary system in which the exemplary embodiments may be practiced.DETAIEED DESCRIPTION OF THE DRAWINGS

[0024] Abbreviations that may be found in the specification and / or the drawing figures are defined below, at the end of the detailed description section.

[0025] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described in this Detailed Description are exemplary embodiments provided to enable persons skilled in the art to make or use the examples.

[0026] When more than one drawing reference numeral, word, or acronym is used within this description with “ / ”, and in general as used within this description, the “ / ” may be interpreted as “or”, “and”, or “both”. As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements are joined by “and” or “or,” mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0027] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “has”, “having”, “includes” and / or “including”, when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0028] It is noted that capital and lowercase words or phrases are considered to be the same herein. For instance, the words Slice, slice, and SLICE are the same, as are the phrases Network Repository Function, network repository function, and NETWORK REPOSITORY FUNCTION.

[0029] Any flow diagram or signaling diagram herein is considered to be a logic flow diagram, and illustrates the operation of an exemplary method, results of execution of computer program instructions embodied on a computer readable memory, and / or functions performed by logicimplemented in circuitry. For methods, flow diagrams, and signaling diagrams, the orders of method steps, blocks in the flow, or signaling are not critical and instead are examples.

[0030] Technical context is now provided for technical areas related to the understanding of the examples. This is provided as brief overviews of possibly related technical areas.

[0031] The description herein relates to precoded based DL (downlink) transmission in a TDD (Time division duplex) system. One DL precoding technique is based on the utilization of SRS (sounding reference signal) for acquiring the channel (considered to be reciprocal in TDD, which means that the channel for uplink and downlink is similar or the same), which is further used for the construction of covariance-based precoding in DL. However, the link adaptation is suboptimal in this case, as the gNB cannot estimate the DL interference plus noise from SRS, because these quantities are not reciprocal in TDD and the gNB has no knowledge of the receiver implementation used by a UE (user equipment, a wireless and typically mobile device). Link adaptation involves both rank selection and MCS (modulation and coding scheme) selection. The SRS provides UL (uplink) information to the gNB, but the gNB does not know what the DL interference plus noise is for the UE, as different receivers for the UE could affect the received power of the useful signal and the level of interference suppression at the UE receiver. On the other hand, CQI (channel quality indicator) and rank can be reported by a UE with a CSI report without PMI (Precoding Matrix Indicator), which requires transmitting UE-specific precoded CSI-RS (channel state information -reference signal) with very large reference signaling overhead. The CSI-RS is a DL signal used for channel sounding and used to measure the characteristics of a radio channel so that the gNB can use correct modulation, code rate, beam forming, and more.

[0032] Current NR (new radio) specifications support a CSI report mechanism without PMI, whereby the gNB transmits precoded CSI-RS resources with CSI-RS ports associated to PDSCH (physical downlink shared channel) layers and the UE selects a preferred rank from several rank hypothesis and calculates the corresponding CQI. However, this technique requires large reference signaling overhead that scales with the number of users served in a cell and relatively large delay between the time when the gNB measures the SRS and the PDSCH transmission when the RI / CQI (where RI = rank indicator) feedback from the UEs has been applied.

[0033] In typical TDD operations, the gNB calculates the precoders for PDSCH from SRS estimation of the DL channel, assuming UL-DL channel reciprocity. By acquiring the DL channel of multiple UEs in the cell, the gNB can make a decision on UE pairing and calculate MU-MIMO (multi-user - multiple input, multiple output) precoders that suppress cross-layer interference between the co-scheduled UEs. However, the gNB has difficulties estimating the transmission rankfor each UE and the corresponding MCS, because the CQI may not be accurately calculated. This is because the interference plus noise power is not reciprocal, in general, between UL and DL and because the gNB has no knowledge of the UE receiver implementation, which affects the received power of the useful signal and the level of interference suppression at the UE receiver.

[0034] A technique to aid the gNB’s determination of rank and MCS is to configure a UE to report an indication of power of interference plus noise (IpN). That is, MCS (modulation and coding scheme) selection is based on expected SINR (signal-to-interference-plus-noise ratio) calculation. SINR is the ratio between signal powers, namely the ratio between the useful signal power and the power of interference plus noise (IpN). In this case, the gNB can combine an estimate of the received signal power based on SRS measurement and assumption of UE decoder with the UE-reported IpN measurement. Note that a CQI measurement, instead, is tied to a specific rank assumption because a CQI measurement estimates the MCS associated to a codeword transmission multiplexed across layers. Hence, reporting a CQI measurement would not allow a gNB to easily determine the CQIs for different rank hypotheses.

[0035] One question is what reference signal can be associated with this IpN measurement by a UE. If a zero-power CSI-RS for interference measurement (ZP-CSI-IM) is configured, a UE could measure and report the IpN power coming from interfering cells, but it would not be able to measure interference from co-scheduled UEs. Besides, the measurement of IpN on ZP-CSI-IM is likely to be an average power measurement across receive antennas which does not account for the UE receiver, if the UE is not configured with some non-zero power (NZP) reference signals which can be used to calculate a receiver. Therefore, advanced interference rejection receivers at the UE may not be accounted for if measurement is configured on a ZP-CSI-IM. Using ZP-CSI-RS for IpN measurement also requires allocating some dedicated reference signal resource for the measurement, in addition to SRS and demodulation reference signal (DMRS) used for receiving the PDSCH. It is noted that DMRS is also referred to as DM-RS.

[0036] The embodiments address these and other issues. An overview is provided now, and more details are provided below.

[0037] In one example, one mechanism is proposed to configure measurement and reporting of IpN on demodulation reference signals, DMRS. To enable measurement of IpN from DMRS, it is proposed to introduce the following dynamic indication by the gNB of which DMRS ports (each associated to a PDSCH layer) should be measured. It is noted that the ports described herein, such as DMRS ports, are antenna ports. This dynamic indication is needed because the PDSCH layers are dynamically indicated to a UE receiving a (next) PDSCH transmission, depending on rank, other co-scheduled UEs, or the like. This is a dynamic indication because the indication of parameters of the PDSCH transmission is (or are) made before each PDSCH transmission where information would be measured. By contrast, the typically used configured grant mechanism is not flexible enough for the IpN measurements used herein. This dynamic indication may be signaled by a new DCI (Downlink control information) field or by re-purposing unused code-points of existing DCI fields. To avoid changing the DCI field definition, it is proposed to add a parameter in the RRC (radio resource control) (or medium access control - control element, MAC-CE) configuration of a trigger state, which selects the DMRS ports for measurement. Alternatively, a link can be established between the DCI indication of the DMRS ports used for receiving the PDSCH and the ports used for measuring IpN. This link may be established, for example, by specifying that IpN measurement is performed on the earliest DMRS transmission occasion occurring after receiving the DCI trigger and on the DMRS ports indicated in the DCI scheduling the corresponding PDSCH.

[0038] The utilization of DMRS based IpN estimation has the following benefits:

[0039] 1) A DMRS-based measurement reflects the interference rejection capability of a UE, because a UE can measure the IpN power with the receiver used for PDSCH demodulation.

[0040] 2) A UE may already have this measurement available as a common reference receiver for inter-cell interference rejection is the MMSE-IRC (minimum mean square error - interference rejection combining) with DMRS-based interference covariance estimation.

[0041] 3) There is the possibility to include inter-user interference in the IpN measurement.

[0042] 4) A UE may be configured to report a received signal power measurement per DMRS port, together with IpN measurement, to allow the gNB to estimate the received signal power more accurately for a given UE receiver implementation, and therefore obtain a better estimate of received CQI for different rank hypotheses.

[0043] In another example, a UE may be configured to measure IpN on a zero-power CSI reference signal for interference measurement (ZP-CSI-IM). In this case, the CSI report configuration for IpN is associated with a ZP-CSI-IM resource and the UE is configured to measure the IpN over the resource elements configured for the ZP-CSI-IM reference within a configured frequency bandwidth on at least one specified port of the reference signal resource.

[0044] In another example, a UE may be configured to measure IpN on a NZP-CSI-RS resource for channel measurement (CMR, channel measurement resource) or interference measurement (NZP-IMR) or a CSI-RS resource set for tracking (TRS). In this case, the CSI report configuration for IpN is associated with a NZP-CSI-RS resource or resource set, and the UE is configured to measure the IpN over the resource elements carrying CSI reference signals within a configured frequencybandwidth on at least one specified port of the CMR or on at least one specified resource and the one port of the TRS set. As previously described, TRS are a type of CSI-RS used for tracking CFO (carrier frequency offset), Doppler shift / spread, and the like. TRS can be used for measuring IpN without needing other CSI-RS. The main difference with CSI-RS for CSI is that TRS are one-port RS, and TRS resources are always transmitted (e.g., periodic TRS are mandatory).

[0045] Note that in legacy CSI reporting, a UE may be configured to measure CQI, including interference, for a CSI report that may include other quantities, such as RI and PMI. In this case, a ZP-CSI-IM or NZP-IMR resource is associated to a non-zero-power CSI reference signal resource for channel measurement. The UE is expected to estimate the DL channel from the NZP-CSI-RS resource, calculate the interference power and estimate the CQI under specified assumptions on the precoder used for PDSCH. In another legacy mechanism, a UE may be configured to measure Ll-SINR (layer 1- signal-to-interference-plus-noise ratio): for channel measurement, the UE may be configured with NZP CSI-RS resources and / or SS / PBCH (Synchronization Signal / Physical broadcast channel block) block resources; and for interference measurement, the UE may be configured with NZP-IMR or CSI- IM (Channel state information - interference measurement) resources. This indicates that legacy interference measurement is always performed together with channel measurement. Consider the following.

[0046] 1) When one Resource Setting is configured, the Resource Setting (given by higher layer parameter resourcesForChannelMeasurement) is for channel measurement for Ll-RSRP or for channel and interference measurement for Ll-SINR computation.

[0047] 2) When two Resource Settings are configured, the first one Resource Setting (given by higher layer parameter resourcesForChannelMeasurement) is for channel measurement and the second one (given by either higher layer parameter csi-IM-ResourcesForlnterference or higher layer parameter nzp-CSI-RS-ResourcesForlnterference) is for interference measurement performed on CSI-IM or on NZP CSI-RS.

[0048] 3) When three Resource Settings are configured, the first Resource Setting (higher layer parameter resourcesForChannelMeasurement) is for channel measurement, the second one (given by higher layer parameter csi-IM-ResourcesForlnterference) is for CSI-IM based interference measurement and the third one (given by higher layer parameter nzp-CSI-RS-ResourcesForlnterference) is for NZP CSI-RS based interference measurement.

[0049] These indicate again that legacy interference measurement is always performed together with channel measurement.

[0050] FIG. 1 also provides an overview and the elements therein are described in more detail below. Turning to FIG. 1 , this figure illustrates a signaling diagram and associated information providing an overview of examples of enhanced link adaption. This is a signaling diagram between a gNB 70 and a UE 10. In signaling 110, the gNB 70 configures (for the UE 10) a resource for interference plus noise (IpN) measurement independent of any resource being configured for channel measurement. In signaling 120, the gNB triggers an IpN report for the UE 10, and this triggering will cause a subsequent report in signaling 150. In signaling 130, the gNB 70 transmits to the UE 10 the resource for the IpN measurement. In operation 140, the UE performs the IpN measurement and calculation based on received resource (e.g., value of interference such as signal power). In signaling 150, the UE 10 reports the result of the IpN calculation. In operation 160, the gNB 70 selects transmit parameters based on the reported result (e.g., the transmit parameters could be used for PDSCH precoding adjustment and / or link adaption based on IpN report).

[0051] There are two main examples. The first example involves DMRS in block 170 and is also described in FIG. 2: Perform dynamic indication of which ports to measure without adding new DCI fields, e.g., by either configuring an RRC parameter (or MAC-CE parameter) in the trigger state, or by specifying a link between a DCI scheduling a PDSCH and a DCI triggering an IpN report.

[0052] The second example involves non-DMRS in block 180, which is, e.g., CSI-RS, and see also FIG. 4: Perform specifying that the interference plus noise should be measured on the resource elements carrying the CSI reference signals, within a configured frequency bandwidth, on at least one specified port of the CSI-RS or on at least one specified resource and one port of a TRS set. The CSI-RS 190 may be the following: A zero-power CSI reference signal for interference measurement (ZP-CSI-IM) 190-1; A non-zero-power CSI reference signal for interference measurement (NZP-IMR) 190-2; A non-zero-power CSI reference signal (NZP-CSI-RS) for channel measurement (CMR) 190-3; or a tracking reference signal (TRS) 190-4. These are described below.

[0053] Additional details are now provided. These start with the DMRS resource examples (as in block 170) then discuss the CSI-RS resource examples (as in block 180).

[0054] There are DMRS reception procedures the UE should follow. Some of the procedures are in Section 5.1.6.2 of 3GPP TS 38.214. There are specific indications on what DMRS ports the UE should use and what is the interpretation of other ports, if they should be used, not used, or assumed as being in use by another UE, hence an implicit signaling of a MU-MIMO operation.

[0055] While in NR, there are two DMRS patterns types (type 1 and type 2), without loss of generality, the following implementation options are possible. The following, within opening andclosing quotation marks, is from Section 5.1.6.2 of 3GPP TS 38.214, where a modification has been added to help implement examples herein:

[0056] “For DMRS configuration type 2,

[0057] - if a UE is scheduled with one codeword and assigned with the antenna port mapping with indices of {2, 10 or 23} in Table 7.3.1.2.2-3 and Table 7.3.1.2.2-4 of Clause 7.3.1.2 of [5, TS 38.212], or

[0058] - if a UE is scheduled with one codeword and assigned with the antenna port mapping with indices of {2, 10, 23 or 24} in Table 7.3.1.2.2-3A and {2, 10, 23 or 58} in Table 7.3.1.2.2-4A of Clause 7.3.1.2 of [5, TS 38.212], or

[0059] - if a UE is scheduled with two codewords,

[0060] the UE may assume that antenna port indices { 1 } are used for IpN computation and all the remaining orthogonal antenna ports are not associated with transmission of PDSCH to another UE.”

[0061] The modification is to add “antenna port indices { 1 } are used for IpN computation and” to the text above. This example has a list of DMRS port indexes with a single entry of { 1 } , but this is only one possible example and a different port or ports may be used.

[0062] In the above example, a single DMRS antenna port is used, however, multiple DMRS antenna ports may be used for IpN measurement.

[0063] In another implementation, where MU-MIMO operation is facilitated, the following may be indicated to the UE. The following, within opening and closing quotation marks, is from Section 5.1.6.2 of 3GPP TS 38.214, where a modification has been added to help implement examples herein:

[0064] “If a UE receiving PDSCH scheduled by DCI format 1_2 is configured with the higher layer parameter phaseTrackingRS in dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2 or dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2 or a UE receiving PDSCH scheduled by DCI format l_0, 1_1 or 1_3 is configured with the higher layer parameter phaseTrackingRS in dmrs-DownlinkForPDSCH-MappingTypeA or dmrs-DownlinkForPDSCH-MappingTypeB, the UE may assume that the following configurations are not occurring simultaneously for the received PDSCH:

[0065] - any DMRS ports among

[0066] 1004-1007 or 1006-1011 for DMRS configurations type 1 and type 2, respectively or,

[0067] 1004-1007 or 1012-1015 for DMRS configuration enhanced type 1 or,

[0068] 1006-1011 or 1018-1023 for DMRS configuration enhanced type 2,

[0069] are scheduled for the UE and the other UE(s) sharing the DMRS REs on the same CDM group(s), and

[0070] - DMRS ports 1000-1003 are used for the IpN computation.

[0071] - PT-RS is transmitted to the UE.”

[0072] The modification is the following: DMRS ports 1000-1003 are used for the IpN computation.”

[0073] Further procedure descriptions are useful to implement examples herein in section 5.2.1.4.1 of 3GPP TS 38.214 where the Resource Setting configurations are described. The following, within opening and closing quotation marks, is from Section 5.2.1.4.1 of 3GPP TS 38.214, where modifications have been added to help implement examples herein:

[0074] “For CSI measurement(s) other than El-SINR, a UE assumes:

[0075] - each NZP CSI-RS port or DMRS port configured for interference measurement corresponds to an interference transmission layer.

[0076] - all interference transmission layers on NZP CSI-RS ports or DMRS ports for interference measurement take into account the associated EPRE ratios configured in 5.2.2.3.1;

[0077] - other interference signal on REs of NZP CSI-RS resource for channel measurement, NZP CSI-RS resource for interference measurement, DMRS ports used for IpN measurement, or CSI-IM resource for interference measurement.

[0078] For Ll-SINR measurement with dedicated interference measurement resources, a UE assumes:

[0079] - the total received power on dedicated NZP CSI-RS resource for interference measurement”

[0080] The modifications are the following: “or DMRS port” after “each NZP CSI-RS port”; “or DMRS ports” after “on NZP CSI-RS ports”; and “DMRS ports used for IpN measurement” after “NZP CSI-RS resource for interference measurement”.

[0081] The report setting a configuration should contain the proper procedures with respect to the IpN reporting, for example in section 5.2.1.4.2 of 38.214 (Report quantity configurations).

[0082] The UE procedure should indicate how the DMRS ports are going to be utilized in constructing and reporting the IpN. For example, the UE is configured with a set of DMRS ports, some of them being used for PDSCH demodulation, while some of them are being used for the computation of one or more IpN terms. For this purpose, the notion of interference DMRS port indicator may be introduced in the specification. This may be facilitated, for example, by a bitmap which clearly describes the DM-RS ports utilization.

[0083] DM-RS port utilization examples include the following.

[0084] In one example, a UE may be configured with one DM-RS port. This may be indicated for both DM-RS demodulation of PDSCH and also for the computation of IpN.

[0085] In another example, a UE may be configured with two DM-RS ports. In this case, the UE may be indicated that the first DM-RS port is used for the demodulation of PDSCH, the UE being configured with a single PDSCH layer transmission, and the UE may be indicated with another port which is used for IpN estimation.

[0086] In yet another example, a UE may be configured with four DM-RS ports. In this case, the UE may be indicated that the first two DM-RS ports are used for the demodulation of a two layer PDSCH, and the UE may be indicated with one another DMRS port which is used for a layer of IpN estimation, and with yet another DMRS port which is used for another layer of IpN estimation. In such a configuration, the UE is configured to report two measurements of IpN, each reflecting different interference conditions observed on separate DMRS ports.

[0087] As a specification implementation example, the following may be captured in 38.214:

[0088] “If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'IpN',

[0089] if the UE is configured with higher layer parameter non-PMI-Portlndication contained in a CSI-ReportConfig, the UE shall only report IpN corresponding to the configured bits with value 1 in the bitmap of interferingDMRSportindicator.,,

[0090] FIG. 2 illustrates an example of signaling diagram for measurement and reporting of IpN report. In this example, the UE 10 sends in signaling 210 an SRS transmission for antenna switching to the gNB 70. The gNB 70 performs PDSCH precoding calculation from (e.g., based on) the SRS in operation 220. In signaling 230, the gNB 70 sends, to the UE 10, DCI(s) schedule PDSCH (and DMRS) and triggering an IpN report. The DCI triggering the IpN report means the DCI contains a message that triggers the UE to take actions to create and send the IpN report. In signaling 240, the gNB 70 performs transmission to the UE 10 of PDSCH and the associated DMRS. The UE 10 performs PDSCH reception and calculation from the same DMRS resource. See operation 250. The UE 10 signals, to the gNB 70, a CSI report of the IpN in signaling 260. The gNB 70 performs PDSCH precoding adjustment and / or link adaptation based on the IpN report. See operation 270.

[0091] Turning to FIG. 3, this figure shows an example of the time relationship between DCIs, DMRS, PDSCH and PUSCH transmission with a link between the IpN report and the DMRS resource and ports to be measured established by the trigger state. Note that in legacy specifications, a CSI report configuration is associated with a CSI resource setting, and in case of aperiodic CSI report, the associated reference signal resources for channel and interference measurement can be periodic, semi-persistent or aperiodic. However, DMRS are configured as part of a PDSCH configuration, hence the UE knows which resource and ports to measure from the DCI schedulingthe first PDSCH transmission after the DCI triggering the IpN report. Note that the DCI scheduling the PDSCH can be transmitted before the DCI triggering the report, however, the scheduled PDSCH needs to happen after the report is triggered. Because the gNB knows when the PDSCH is transmitted, the gNB can schedule a PUSCH resource for reporting IpN such that some minimum latency requirements LfL' , illustrated in the figure, are satisfied.

[0092] In more detail, the gNB 70 sends a DCI scheduling PDSCH in signaling 310, and sends a DCI triggering an IpN report in signaling 320. Signaling 310 and 320 are examples of the signaling occurring in signaling 230 of FIG. 2. The gNB 70 sends DMRS and PDSCH transmission in signaling 330, which corresponds to signaling 240 of FIG. 2. The UE 10 sends the IpN report in the PUSCH (physical uplink shared channel) in signaling 340, which corresponds to signaling 260 in FIG. 2. Latency requirement Z is from the DCI triggering signaling 320 to the PUSCH resource signaling 340.

[0093] Latency requirement Z’ is from the PDSCH transmission signaling 330, which contains the DMRS, to the PUSCH resource signaling 340. The gNB 70 controls which PUSCH resource is used by the UE 10 to send the IpN report and therefore can adjust timing to meet the latency requirement Z’. The gNB 70 can adjust the timings 350, 360, and 370 so that there is enough time for the PDSCH transmission in signaling 330 and the reporting in signaling 340 to be performed so that the latency requirement Z is met relative to the DCI triggering 320.

[0094] The minimum latency requirement of Z’ may be applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource (e.g., 340) that carries the report of the IpN calculation. The minimum latency requirement of Z’ may be determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0095] Referring to PIG. 4, this figure illustrates a second embodiment example, where at least one CSLRS resource is associated to the IpN report configuration and the UE is configured to measure interference plus noise power over the resource elements carrying the CSI reference signals within a configured frequency bandwidth, on at least one specified port of the CSI-RS or on at least one specified resource and the one port of the TRS set.

[0096] In signaling 410, the gNB 70 signals, to the UE 10, RRC configuration including for an IpN report with associated at least one CSI-RS resource. The gNB 70 in signaling 420 performs DCI triggering of an IpN report, and performs transmission of the at least one CSI-RS resource in signaling 430. The UE 10 performs IpN calculation over the resource elements of at least onespecified port of the configured CSI-RS resource in operation 440. The UE 10, in signaling 450 to the gNB 70, sends a CSI report of IpN, for example in dBm. In signaling 210, the UE sends an SRS transmission for antenna switching to the gNB 70, and the gNB 70 performs PDSCH precoding calculation from (e.g., based on) the SRS in operation 220. In operation 270, the gNB 70 performs PDSCH precoding adjustment and / or link adaptation based on the IpN report.

[0097] Referring to FIG. 5, this figure is a logic flow diagram using DMRS for transmit parameter selection based on reported values of interference for IpN, which is performed by a UE. Operation 510 includes receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs). It is noted that one can have both DMRS and PDSCH data on the same symbol. Furthermore, concerning the density and pattern of the DMRS(s) for demodulation and the DMRS(s) for IpN, these may have the same or different density or pattern (e.g., of symbols in the time-frequency resource space used to convey information in the PDSCH). That is, at least one demodulation reference signal (DMRS) antenna port, which is indicated for the demodulation of the PDSCH transmission, and at least one DMRS antenna port, which is indicated for the IpN measurement and the IpN calculation, may have different pattern or density.

[0098] In operation 520, the UE 10 receives, from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement, and UE 10 receives, from the network node, a downlink channel comprising the DMRSs for the IpN measurement in operation 530.

[0099] In operation 540, the UE performs, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports. The UE, in operation 550, reports, to the network node, a result of IpN calculation that is based on the IpN measurement.

[0100] The dynamic indication may be received in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link may be established between the first DCI and the second DCI. For this example, the one or more physical resources are associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0101] In one example, the link specifies that IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI. In another example, the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the IpN report and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI. Additionally, the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or the DMRS transmission.

[0102] For the previous paragraph, one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0103] Turning to FIG. 6, this figure is a logic flow diagram using DMRS for transmit parameter selection based on reported values of interference for IpN, which is performed by a network node. The network node may be the gNB 70, and is assumed to be the gNB 70. However, there are other options for the network node, as described in reference to FIG. 7.

[0104] In operation 610, sending is performed by a network node to a user equipment, of dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement. The dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs). In operation 620, the network node sends, to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement. In operation 630, the network node sends, to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement. The network node, in operation 640 receives, from the user equipment, a report of a result of an IpN calculation performed by the user equipment responsive at least to the trigger. In operation 650, the network node selects one or more transmit parameters for use based on the report of the result.

[0105] In an example, the selecting the one or more transmit parameters to use based on the report of the result comprises selecting the one or more transmit parameters to use for one or both of PDSCH precoding adjustment or link adaptation based on the report of the result. Implementingmay be performed by the network node of the one or both of the PDSCH precoding adjustment or the link adaptation.

[0106] Turning to FIG. 7, this figure shows a block diagram of one possible and nonlimiting example of a cellular network 1 that is connected to a user equipment (UE) 10. A number of network elements are shown in the cellular network of FIG. 7: a gNB 70, which may be an access network; and a core network 90.

[0107] In FIG. 7, a user equipment (UE) 10 is in wireless communication via radio link 11 with the access network 70 of the cellular network 1. A UE 10 is a wireless communication device, such as a mobile device, that is configured to access a cellular network. The UE 10 is illustrated with one or more antennas 28. The ellipses 2 indicate there could be multiple UEs 10 in wireless communication via radio links with the access network 70. The UE 10 includes one or more processors 13, one or more memories 15, and other circuitry 16. The other circuitry 16 includes one or more receivers (Rx(s)) 17 and one or more transmitters (Tx(s)) 18. Instructions 12 (e.g., from a program or other software) are used to cause the UE 10 to perform the operations described herein. For a UE 10, the other circuitry 16 could include circuitry such as for user interface elements (not shown) like a display. The instructions 12 may be stored in memory / memories 15 and executed by processor(s) 13, or executed by circuitry such being implemented as part of the processor(s) or other circuitry elements, or both.

[0108] The gNB 70, as a network element of the cellular network 1, provides the UE 10 access to cellular network 1 and to the data network 91 via the core network 90 (e.g., via a user plane function (UPF) of the core network 90). As such, the access network 70 may be considered to be a base station that is an access node, which provides access by UE(s) 10 to the cellular network 1. The gNB 70 is illustrated as having one or more antennas 58. In general, the gNB 70 may be referred to as RAN (radio access network) node or (equivalently) an access network, and may be abbreviated as (R)AN. Most make reference to this as a gNB (gNode B, a base station for NR, new radio) 70 instead. There are, however, many other examples of RAN nodes including an eNB (evolved Node B) or TRP (Transmission-Reception Point).

[0109] The gNB 70 may be monolithic, meaning that all functionality such as the layers in a protocol stack is performed in a single element. The gNB, as an access network, may also be implemented in a functional split, where some of the (e.g., lower) layers of the protocol stack are implemented in a DU (distributed unit) 42 and some of the (e.g., higher) layers are implemented in a CU (central unit) 43, and there is a "midhaul" interface 44 connecting the DU 42 and CU 43. There may be multiple DUs 42 per CU 43, although only one DU 42 is shown in FIG. 7. Furthermore, theDU(s) 42 can be connected to radio units (RUs) 41, which handle at least the parts of the physical layer for transmission and reception. The DU(s) 42 can be connected to radio units (RUs) 41 through a "fronthaul" interface 46. The CU 43 and DU 42 may be logical nodes, which are implemented by the gNB 70 via the processor(s) 73, by retrieving the instructions 72 from the memories 75 and by executing the instructions 72.

[0110] The gNB 70 includes one or more processors 73, one or more memories 75, and other circuitry 76. The other circuitry 76 includes one or more receivers (Rx(s)) 77 and one or more transmitters (Tx(s)) 78. Instructions 72 (e.g., from a program or other software) are used to cause the gNB 70 to perform the operations described herein. The instructions 72 may be stored in memory / memories 75 and executed by processor(s) 73, or executed by circuitry such being implemented as part of the processor(s) or other circuitry elements, or both. If the functionality split is used, the DU 42 and CU 43, which may be referred to as logical elements, are implemented using the circuitry of the processors 73, the memories 75, and potentially other circuitry 76.

[0111] The term “network node” herein is used to indicate a node of the network that controls communication between the network 1 and the UE 10. The network node may be the gNB 70 or may be the CU 43, or other node in the network 1 that can control (e.g., cause to be performed) or perform the operations indicated herein.

[0112] It is noted that the gNB 70 may instead be implemented via other wireless technologies, such as Wi-Fi (a wireless networking protocol that devices use to communicate without direct cable connections). In the case of Wi-Fi, the link 11 could be characterized as a wireless link.

[0113] Two or more gNBs 70 communicate using, e.g., link(s) 79. The link(s) 79 may be wired or wireless or both and may implement, e.g., an Xn interface for 5G (fifth generation), an X2 interface for ETE (Long Term Evolution), or other suitable interface for other standards.

[0114] The cellular network 1 may include a core network 90, as a second network element or elements, that may include core network functionality, and which provide connectivity via a link or links 81 with a data network 91 , such as a telephone network and / or a data communications network (e.g., the Internet). The core network 90 includes one or more processors 93, one or more memories 95, and other circuitry 96. The other circuitry 96 includes one or more receivers (Rx(s)) 97 and one or more transmitters (Tx(s)) 98. Instructions 92 (such as from a program or other software) are used to cause the core network 90 to perform the operations described herein. The instructions 92 may be stored in memory / memories 95 and executed by processor(s) 93, or executed by circuitry such being implemented as part of the processor(s) or other circuitry elements, or both.

[0115] The core network 90 could be a 5GC (5G core network). The core network 90 can implement or comprise multiple network functions (NF(s)) 99, and the instructions 92 may comprise one or more of the NFs 99. A 5G core network may use circuitry such as memory and processors, which may implement a virtualization layer. It could be a single standalone computing system, a distributed computing system, or a cloud computing system. The NFs 99, as network elements, of the core network could be containers or virtual machines running on the circuitry of the computing system(s) making up the core network 90.

[0116] Core network functionality for 5G may include access and mobility management functionality that is provided by a network function 99 such as an access and mobility management function (AMF), session management functionality that is provided by a network function such as a session management function (SMF). Core network functionality for access and mobility management in an LTE (Long Term Evolution) network may be provided by an MME (Mobility Management Entity) and / or SGW (Serving Gateway) functionality, which routes data to the data network. Many others are possible, as illustrated by the examples in FIG. 7: AMF; SMF; MME; SGW; GMLC (Gateway Mobile Location Center); LMF (Location Management Function); UDM (Unified Data Management ) / UDR (Unified Data Repository); NRF (Network Repository Function); and / or E-SMLC (Evolved Serving Mobile Location Center). These are merely exemplary core network functionality that may be provided by the core network 90, and note that both 5G and LTE core network functionality might be provided by the core network 90. The gNB 70 is coupled via a backhaul link 31 to the core network 90. The gNB 70 and the core network 90 may include an NG (Next Generation) interface for 5G, or an SI interface for LTE, or other suitable interface for other radio access technologies for communicating via the backhaul link 31.

[0117] In the data network 91 , there are instructions 94 stored in a computer-readable storage medium 4- 1 , which could be circuitry such as long-term memory such as a hard drive or a solid-state drive, a short-term memory such as dynamic random-access memory, or a combination of both (e.g., reading from long-term memory for temporary placement into short-term memory and subsequent downloading). The computer-readable medium 4-1 contains instructions 94 that, when downloaded and installed into the instructions 12, 72, and 92 and / or memories 15, 75, or 95 of the corresponding UE 10, gNB 70, and / or core network element(s) 90, and executed by processor(s) 13, 73, or 93, cause the respective device to perform corresponding actions described herein. The computer-readable storage medium 4 may be implemented in other forms, such as via instructions 94 on a compact disc (as a computer-readable storage medium 4-2) or a memory stick.

[0118] The instructions 12, 72, and 92 are stored by corresponding one or more memories 15, 75, or 95. These instructions, when executed by the corresponding one or more processors 13, 73, or 93, cause the corresponding apparatus 10, 70, or 90, to perform the operations described herein. The computer readable memories 15, 75, or 95 are circuitry and may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, firmware, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The processors 13, 73, and 93, are circuitry and may be of any type suitable to the local technical environment. For example, these processors may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), processors based on a multi-core processor architecture, and may also include specialized circuits such as field-programmable gate arrays (FPGAs), application specific circuits (ASICs), signal processing devices and other devices, or combinations of these devices, as non-limiting examples. The processors 13, 73, and 93 are circuitry that can be programmed to perform functions via software, firmware or the like (including microcode), but are not solely software.

[0119] The receivers 17, 77, and 97, and the transmitters 18, 78, and 98 may implement wired or wireless interfaces. The receivers and transmitters may be grouped together as transceivers.

[0120] The cellular network 1 may implement network virtualization, which is the process of combining circuitry and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. Note that the virtualized entities (such as network functions 99) that result from the network virtualization are still implemented, at some level, using circuitry such as processors 73 and / or 93 and memories 75 and / or 95, and also such virtualized entities create technical effects.

[0121] In general, the various embodiments of the user equipment 10 can include, but are not limited to, devices implementing cellular technologies (such as smart phones, mobile phones, cellular phones, voice over Internet Protocol (IP) (VoIP) phones, and / or wireless local loop phones), tablets, portable computers, vehicles or vehicle-mounted devices for, e.g., wireless V2X (vehicle-to-everything) communication, image capture devices such as digital cameras, gaming devices, music storage and playback appliances, Internet appliances (including Internet of Things, loT, devices), loT devices with sensors and / or actuators for, e.g., automation applications, as well as portable unitsor terminals that incorporate combinations of such functions, laptop-embedded equipment (LEE), laptop-mounted equipment (LME), Universal Serial Bus (USB) dongles, smart devices, wireless customer-premises equipment (CPE), an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD), a vehicle, a drone, a medical device and applications (e.g., remote surgery), an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts), a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. That is, the UE 10 could be any end device that may be capable of wireless communication. By way of example rather than limitation, the UE may also be referred to as a communication device, terminal device (MT), a Subscriber Station (SS), a Portable Subscriber Station, a Mobile Station (MS), or an Access Terminal (AT).

[0122] Without in any way limiting the scope, interpretation, or application of the claims appearing below, a technical effect and / or advantage of one or more of the example embodiments disclosed herein is a more efficient link adaptation performed by the network. Another technical effect and / or advantage of one or more of the example embodiments disclosed herein is the reflection of the interference rejection capability of a UE in the reported CSI feedback. Another technical effect and / or advantage of one or more of the example embodiments disclosed herein is the incorporation of the inter-user interference in the IpN measurement.

[0123] The following are additional examples.

[0124] Example 1. A method, comprising: receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0125] Example 2. The method according to example 1 , wherein the dynamic indication is received in a field of downlink control information (DCI).

[0126] Example 3. The method according to example 1, wherein the dynamic indication is received in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0127] Example 4. The method according to example 1 , wherein the dynamic indication is received via a parameter in a radio resource control (RRC) or medium access control - control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0128] Example 5. The method according to example 1, wherein the dynamic indication is received in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0129] Example 6. The method according to example 5, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0130] Example 7. The method according to example 5, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0131] Example 8. The method according to example 6 or 7, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0132] Example 9. The method of any of examples 1 to 8, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0133] Example 10. The method according to any of examples 1 to 9, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0134] Example 11. The method according to any of examples 1 to 9, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0135] Example 12. The method according to any of examples 1 to 9, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0136] Example 13. The method according to any of examples 10 to 12, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0137] Example 14. A method, comprising: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physicaldownlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0138] Example 15. The method according to example 14, wherein: selecting the one or more transmit parameters to use based on the report of the result comprises selecting the one or more transmit parameters to use for one or both of PDSCH precoding adjustment or link adaptation based on the report of the result; and the method further comprises implementing the one or both of the PDSCH precoding adjustment or the link adaptation.

[0139] Example 16. The method according to example 14, wherein the dynamic indication is sent in a field of downlink control information (DCI).

[0140] Example 17. The method according to example 14, wherein the dynamic indication is sent in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0141] Example 18. The method according to example 14, wherein the dynamic indication is sent via a parameter in a radio resource control (RRC) or medium access control - control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0142] Example 19. The method according to example 14, wherein the dynamic indication is sent in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0143] Example 20. The method according to example 19, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0144] Example 21. The method according to example 19, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0145] Example 22. The method according to example 20 or 21, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0146] Example 23. The method of any of examples 14 to 22, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0147] Example 24. The method according to any of examples 14 to 23, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0148] Example 25. The method according to any of examples 14 to 23, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0149] Example 26. The method according to any of examples 14 to 23, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the fourDMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0150] Example 27. The method according to any of examples 24 to 26, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0151] Example 28. An apparatus, comprising means for: receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0152] Example 29. The apparatus according to example 28, wherein the dynamic indication is received in a field of downlink control information (DCI).

[0153] Example 30. The apparatus according to example 28, wherein the dynamic indication is received in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0154] Example 31. The apparatus according to example 28, wherein the dynamic indication is received via a parameter in a radio resource control (RRC) or medium access control -control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0155] Example 32. The apparatus according to example 28, wherein the dynamic indication is received in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physicalresources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0156] Example 33. The apparatus according to example 32, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0157] Example 34. The apparatus according to example 32, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0158] Example 35. The apparatus according to example 33 or 34, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0159] Example 36. The apparatus of any of examples 28 to 35, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0160] Example 37. The apparatus according to any of examples 28 to 36, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0161] Example 38. The apparatus according to any of examples 28 to 36, wherein the dynamic indication configures the user equipment with first and second demodulation referencesignal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0162] Example 39. The apparatus according to any of examples 28 to 36, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0163] Example 40. The apparatus according to any of examples 37 to 39, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0164] Example 41. An apparatus, comprising means for: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0165] Example 42. The apparatus according to example 41, wherein: selecting the one or more transmit parameters to use based on the report of the result comprises selecting the one or more transmit parameters to use for one or both of PDSCH precoding adjustment or link adaptationbased on the report of the result; and the means are further configured for implementing the one or both of the PDSCH precoding adjustment or the link adaptation.

[0166] Example 43. The apparatus according to example 41, wherein the dynamic indication is sent in a field of downlink control information (DCI).

[0167] Example 44. The apparatus according to example 41, wherein the dynamic indication is sent in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0168] Example 45. The apparatus according to example 41, wherein the dynamic indication is sent via a parameter in a radio resource control (RRC) or medium access control -control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0169] Example 46. The apparatus according to example 41, wherein the dynamic indication is sent in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0170] Example 47. The apparatus according to example 46, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0171] Example 48. The apparatus according to example 46, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0172] Example 49. The apparatus according to example 47 or 48, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI isreceived after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0173] Example 50. The apparatus of any of examples 41 to 49, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0174] Example 51. The apparatus according to any of examples 41 to 50, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0175] Example 52. The apparatus according to any of examples 41 to 50, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0176] Example 53. The apparatus according to any of examples 41 to 50, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0177] Example 54. The apparatus according to any of examples 51 to 53, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0178] Example 55. An apparatus, comprising: one or more processors; and one or more memories storing instructions that, when executed by the one or more processors, cause theapparatus at least to perform: receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement; performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

[0179] Example 56. The apparatus according to example 55, wherein the dynamic indication is received in a field of downlink control information (DCI).

[0180] Example 57. The apparatus according to example 55, wherein the dynamic indication is received in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0181] Example 58. The apparatus according to example 55, wherein the dynamic indication is received via a parameter in a radio resource control (RRC) or medium access control -control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0182] Example 59. The apparatus according to example 55, wherein the dynamic indication is received in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0183] Example 60. The apparatus according to example 59, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0184] Example 61. The apparatus according to example 59, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0185] Example 62. The apparatus according to example 60 or 61, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0186] Example 63. The apparatus of any of examples 55 to 62, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0187] Example 64. The apparatus according to any of examples 55 to 63, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0188] Example 65. The apparatus according to any of examples 55 to 63, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0189] Example 66. The apparatus according to any of examples 55 to 63, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the fourDMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0190] Example 67. The apparatus according to any of examples 64 to 66, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0191] Example 68. An apparatus, comprising: one or more processors; and one or more memories storing instructions that, when executed by the one or more processors, cause the apparatus at least to perform: sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs); sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement; receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; and selecting, by the network node, one or more transmit parameters to use based on the report of the result.

[0192] Example 69. The apparatus according to example 68, wherein: selecting the one or more transmit parameters to use based on the report of the result comprises selecting the one or more transmit parameters to use for one or both of PDSCH precoding adjustment or link adaptation based on the report of the result; and the one or more memories further store instructions that, when executed by the one or more processors, cause the apparatus at least to perform implementing the one or both of the PDSCH precoding adjustment or the link adaptation.

[0193] Example 70. The apparatus according to example 68, wherein the dynamic indication is sent in a field of downlink control information (DCI).

[0194] Example 71. The apparatus according to example 68, wherein the dynamic indication is sent in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

[0195] Example 72. The apparatus according to example 68, wherein the dynamic indication is sent via a parameter in a radio resource control (RRC) or medium access control -control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

[0196] Example 73. The apparatus according to example 68, wherein the dynamic indication is sent in a second DO having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

[0197] Example 74. The apparatus according to example 73, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

[0198] Example 75. The apparatus according to example 73, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

[0199] Example 76. The apparatus according to example 74 or 75, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement: one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; or the first and second DCI are received in a same slot.

[0200] Example 77. The apparatus of any of examples 68 to 76, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCHtransmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

[0201] Example 78. The apparatus according to any of examples 68 to 77, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

[0202] Example 79. The apparatus according to any of examples 68 to 77, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

[0203] Example 80. The apparatus according to any of examples 68 to 77, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

[0204] Example 81. The apparatus according to any of examples 78 to 80, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

[0205] Example 82. A computer program, comprising instructions which, when the program is executed by an apparatus, cause the apparatus to carry out the methods of any of examples 1 to 27.

[0206] Example 83. The computer program according to example 82, wherein the computer program is a computer program product comprising a computer-readable medium bearing the instructions embodied therein for use with the apparatus.

[0207] Example 84. The computer program according to example 82, wherein the computer program is directly loadable into an internal memory of the apparatus.

[0208] As used in this application, the term “circuitry” may refer to one or more or all of the following:

[0209] (a) hardware-only circuit implementations (such as implementations in analog, digital, and / or quantum circuitry) and

[0210] (b) combinations of hardware circuits and software such as (as applicable): (i) a combination of analog, digital, and / or quantum hardware circuit(s) with software / firmware and (ii) any or all portions of hardware processor(s) (including digital and / or quantum processor(s)) with software, and memory(ies) that work together to cause an apparatus, such as a mobile device, computing device, or server, to perform various functions) and

[0211] (c) any or all portions of hardware circuit(s), such as microprocessor(s), processor(s) and / or quantum processors, that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.

[0212] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

[0213] In an example embodiment, software (e.g., application logic, an instruction set) as used herein is maintained on any one of various conventional computer-readable media. In the context of this document, a “computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted, e.g., in FIG. 7. A computer-readable medium may comprise a computer-readable storage medium (e.g., memories 15, 75, and 95 or other device) that may be any media or means that can contain, store, and / or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer. A computer-readable storage medium does not comprise propagating signals, and therefore may be considered to be non-transitory. The term “non-transitory”, as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM, random access memory, versus ROM, read-only memory).

[0214] If desired, the different functions discussed herein may be performed in a different order and / or concurrently with each other. Furthermore, if desired, one or more of the abovedescribed functions may be optional or may be combined.

[0215] Although various aspects of the invention are set out in the independent claims, other aspects of the invention comprise other combinations of features from the described embodiments and / or the dependent claims with the features of the independent claims, and not solely the combinations explicitly set out in the claims.

[0216] It is also noted herein that while the above describes example embodiments of the invention, these descriptions should not be viewed in a limiting sense. Rather, there are several variations and modifications which may be made without departing from the scope of the present invention as defined in the appended claims.

[0217] The following abbreviations that may be found in the specification and / or the drawing figures are defined as follows:

[0218] 5G fifth generation

[0219] CMR channel measurement resource

[0220] CSI-IM Channel state information - interference measurement

[0221] CSI-RS channel state information - reference signal

[0222] DCI Downlink control information

[0223] DL downlink (from gNB to UE)

[0224] DMRS demodulation reference signal

[0225] E-SMLC evolved serving mobile location center

[0226] eNB (or eNodeB) evolved Node B (e.g., an ETE base station)

[0227] gNB (or gNodeB) base station for 5G / NR

[0228] IMR interference measurement resource

[0229] IpN interference plus noise

[0230] LTE long term evolution

[0231] MAC-CE medium access control - control element

[0232] MIMO multiple input, multiple output

[0233] ng or NG next generation

[0234] NR new radio

[0235] NRF Network Repository Function

[0236] N / W or NW network

[0237] NZP-IMR Non-zero power - interference management resource

[0238] PDSCH physical downlink shared channel

[0239] PMI Precoding Matrix Indicator

[0240] PUSCH physical uplink shared channel

[0241] RAN radio access network

[0242] Rx receiver

[0243] SINR signal-to-interference-plus-noise ratio

[0244] SRS sounding reference signal

[0245] SS / PBCH Synchronization Signal / Physical broadcast channel block

[0246] TDD Time division duplex

[0247] TRP transmission-reception point

[0248] TRS tracking reference signal

[0249] Tx transmitter

[0250] UE user equipment (e.g., a wireless, typically mobile device)

[0251] UL uplink (from UE to gNB)

[0252] ZP-CSI-IM zero-power CSI-RS for interference measurement

Claims

What is claimed is:

1. An apparatus, comprising:one or more processors; andone or more memories storing instructions that, when executed by the one or more processors, cause the apparatus at least to perform:receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement;performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

2. The apparatus according to claim 1, wherein the dynamic indication is received in a field of downlink control information (DCI).

3. The apparatus according to claim 1, wherein the dynamic indication is received in repurposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

4. The apparatus according to claim 1, wherein the dynamic indication is received via a parameter in a radio resource control (RRC) or medium access control - control element(MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

5. The apparatus according to claim 1, wherein the dynamic indication is received in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

6. The apparatus according to claim 5, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

7. The apparatus according to claim 5, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

8. The apparatus according to claim 6 or 7, wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement:one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; orthe first and second DCI are received in a same slot.

9. The apparatus of any of claims 1 to 8, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRStransmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

10. The apparatus according to any of claims 1 to 9, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

11. The apparatus according to any of claims 1 to 9, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

12. The apparatus according to any of claims 1 to 9, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the user equipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

13. The apparatus according to any of claims 10 to 12, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

14. An apparatus, comprising:one or more processors; andone or more memories storing instructions that, when executed by the one or more processors, cause the apparatus at least to perform:sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement;receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; andselecting, by the network node, one or more transmit parameters to use based on the report of the result.

15. The apparatus according to claim 14, wherein:selecting the one or more transmit parameters to use based on the report of the result comprises selecting the one or more transmit parameters to use for one or both of PDSCH precoding adjustment or link adaptation based on the report of the result; and the one or more memories further store instructions that, when executed by the one or more processors, cause the apparatus at least to perform implementing the one or both of the PDSCH precoding adjustment or the link adaptation.

16. The apparatus according to claim 14, wherein the dynamic indication is sent in a field of downlink control information (DCI).

17. The apparatus according to claim 14, wherein the dynamic indication is sent in re-purposed one or more unused code -points of one or more existing fields of downlink control information (DCI).

18. The apparatus according to claim 14, wherein the dynamic indication is sent via a parameter in a radio resource control (RRC) or medium access control - control element (MAC-CE) configuration of a trigger state, which selects the associated one or more antenna ports for the DMRSs for the IpN measurement.

19. The apparatus according to claim 14, wherein the dynamic indication is sent in a second DCI having a trigger for a PDSCH and DMRS transmission, and a link is established between the first DCI and the second DCI, wherein the one or more physical resources associated with one or both of the PDSCH transmission or DMRS transmission, and the associated one or more antenna ports indicated for receiving the PDSCH, are used for performing the IpN measurement.

20. The apparatus according to claim 19, wherein the link specifies that the IpN measurement is performed on an earliest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission occurring after receiving the first DCI and on the associated one or more antenna ports used for receiving the PDSCH transmission indicated in the second DCI.

21. The apparatus according to claim 19, wherein the link specifies that IpN measurement is performed on a latest transmission occasion for one or both of the PDSCH transmission or DMRS transmission occurring no later than a channel state information (CSI) reference resource in time associated with the report of the IpN calculation and on the associated one or more antenna ports used for receiving the PDSCH indicated in the second DCI , and where the second DCI corresponds to such latest transmission occasion for the one or both of the PDSCH transmission or DMRS transmission.

22. The apparatus according to claim 20 or 21 , wherein one or more of the following conditions determine whether a transmission occasion for one or both of the PDSCH transmission or DMRS transmission is valid for the IpN measurement:one of the first DCI is received after the second DCI or the second DCI is received after the first DCI; orthe first and second DCI are received in a same slot.

23. The apparatus of any of claims 14 to 22, wherein a minimum latency requirement is applied between the transmission occasion of one or both of the PDSCH transmission or DMRS transmission used for the IpN measurement and a physical uplink channel (PUSCH) resource that carries the report of the IpN calculation, where the minimum latency requirement is determined in a number of symbols between a last symbol of one or both of the PDSCH transmission or DMRS transmission and a first uplink symbol to carry the report of the IpN calculation.

24. The apparatus according to any of claims 14 to 23, wherein the dynamic indication configures the user equipment with one demodulation reference signal (DMRS) antenna port, which is indicated for both DMRS demodulation of the PDSCH transmission and also for the IpN measurement and the IpN calculation.

25. The apparatus according to any of claims 14 to 23, wherein the dynamic indication configures the user equipment with first and second demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates that the first DMRS antenna port is used for the demodulation of PDSCH transmission, wherein the user equipment is configured with a single PDSCH layer transmission, and wherein the dynamic indication indicates the second DMRS antenna port is used for IpN estimation.

26. The apparatus according to any of claims 14 to 23, wherein the dynamic indication configures the user equipment with four demodulation reference signal (DMRS) antenna ports, wherein the dynamic indication indicates the following: a first two of the four DMRS antenna ports are used for the demodulation of a two layer PDSCH transmission; a third of the four DMRS antenna ports is used for a layer of IpN measurement; and a fourth of the four DMRS antenna ports is used for another layer of IpN measurement, wherein the userequipment is configured to report two results of IPN calculations based on the IpN measurements of the layer and the other layer.

27. The apparatus according to any of claims 24 to 26, wherein at least one demodulation reference signal (DMRS) antenna port which is indicated for the demodulation of the PDSCH transmission and at least one DMRS antenna port which is indicated for the IpN measurement and the IpN calculation have different pattern or density.

28. A method, comprising:receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement;performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

29. A method, comprising:sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement;receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; andselecting, by the network node, one or more transmit parameters to use based on the report of the result.

30. An apparatus, comprising means for:receiving, by a user equipment from a network node, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physical downlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);receiving, by the user equipment from the network node, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; receiving, by the user equipment from the network node, a downlink channel comprising the DMRSs for the IpN measurement;performing, in response at least to the trigger, the IpN measurement based on the indicated one or more physical resources and the associated one or more antenna ports; and reporting, by the user equipment to the network node, a result of IpN calculation that is based on the IpN measurement.

31. An apparatus, comprising means for:sending, by a network node to a user equipment, dynamic indication of which of one or more physical resources and which one or more antenna ports associated with the one or more physical resources should be measured for interference plus noise (IpN) measurement, where the dynamically indicated one or more physical resources and associated one or more antenna ports correspond to one or both of a physicaldownlink shared channel (PDSCH) transmission or associated demodulation reference signals (DMRSs);sending, by the network node to the user equipment, a first downlink control information (DCI) having a trigger for reporting of a result of the IpN measurement; sending, by the network node to the user equipment, a downlink channel comprising the DMRSs for the IpN measurement;receiving, by the network node from the user equipment responsive at least to the trigger, a report of a result of an IpN calculation that is based on the IpN measurement performed by the user equipment; andselecting, by the network node, one or more transmit parameters to use based on the report of the result.

32. A computer program, comprising instructions which, when the program is executed by an apparatus, cause the apparatus to carry out the method of claim 28 or 29.

33. The computer program according to claim 32, wherein the computer program is a computer program product comprising a computer-readable medium bearing the instructions embodied therein for use with the apparatus.

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