Resource and report configuration enhancements for cyberspace element adaptation

Abstract

A wireless communication system may use resource and report setting enhancements for network space element adaptation. In some embodiments, a network node may encode a channel state information (CSI) report setup information element. The CSI report setting information element may include an indication of a subset of ports for a user equipment (UE) to measure for a spatial element adaptive CSI-reference signal (CSI-RS) report. The UE may measure the CSICSI-RS and report the measurements to the network node.

Description

Technical Field

[0001] The present application generally relates to wireless communication systems, including configurations for CSI-RS reporting to support spatial element adaptation. Background Art

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between base stations and wireless communication devices. Wireless communication system standards and protocols may include, for example, the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for wireless local area networks (WLANs) (commonly referred to within industry organizations as Wi-Fi). ® ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols may use various radio access networks (RANs) to facilitate communication between RAN base stations (which may also sometimes be collectively referred to as RAN nodes, network nodes, or simply nodes) and wireless communication devices, known as user equipment (UE). 3GPP RANs may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN can use one or more radio access technologies (RATs) to perform communications between base stations and UEs. For example, GERAN implements GSM and / or EDGE RATs, UTRAN implements Universal Mobile Telecommunications System (UMTS) RATs or other 3GPP RATs, E-UTRAN implements LTE RATs (sometimes referred to herein as LTE), and NG-RAN implements NR RATs (sometimes referred to herein as 5G RATs, 5G NR RATs, or simply NR). In some deployments, E-UTRAN may also implement NR RATs. In some deployments, NG-RAN may also implement LTE RATs.

[0005] The base stations used by the RAN may correspond to the RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (often also referred to as an evolved Node B, enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also referred to as a gNodeB or gNB).

[0006] The RAN provides communication services together with external entities through its connection to the Core Network (CN). For example, E-UTRAN can utilize the Evolved Packet Core (EPC), while NG-RAN can utilize the 5G Core Network (5GC). BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To easily identify the discussion of any particular element or action, the most significant digit(s) in a reference number refers to the drawing number that first introduces that element.

[0008] Figure 1A Type 1 TxRU reduction is illustrated.

[0009] Figure 1B Type 2 TxRU reduction is illustrated.

[0010] Figure 2 The CSI-ReportConfig information element according to some embodiments is illustrated.

[0011] Figure 3 The CSI-ResourceConfig information element according to some embodiments is illustrated.

[0012] Figure 4 The CSI resource set information element and the CSI-RS information element are illustrated.

[0013] Figure 5 Potential new elements that may be introduced to support multiple CSI reporting for spatial element adaptation are illustrated.

[0014] Figure 6 A port 2 fd-CDM2 CSI-RS pattern, a port 4 fd-CDM2 CSI-RS pattern, a port 8 fd-CDM2 CSI-RS pattern, and a port 12 fd-CDM2 CSI-RS pattern are exemplified.

[0015] Figure 7 A port 16 fd-CDM2 CSI-RS pattern, a port 24 fd-CDM2 CSI-RS pattern, and a port 32 fd-CDM2 CSI-RS pattern are exemplified.

[0016] Figure 8 Another port 4 fd-CDM2 CSI-RS pattern and a port 8 fd-CDM2 CSI-RS pattern are illustrated.

[0017] Figure 9A port 8 CDM4-fd2-TD2 CSI-RS pattern, a port 12 CDM4-fd2-TD2 CSI-RS pattern, a port 16 CDM4-fd2-TD2 CSI-RS pattern, and a port 24 CDM4-fd2-TD2 CSI-RS pattern are illustrated.

[0018] Figure 10 A port 32 CDM4-fd2-TD2 CSI-RS pattern is illustrated.

[0019] Figure 11 A port 24 cdm8-FD2-TD4 CSI-RS pattern and a port 32 cdm8-FD2-TD4 CSI-RS pattern are illustrated.

[0020] Figure 12 A portion of an NZP-CSI-RS-Resource information element including a Reduced Measurement Port field is illustrated according to some embodiments.

[0021] Figure 13 Four different CDM group selections are illustrated according to some embodiments.

[0022] Figure 14 Illustrated is a configuration of CDM group selection according to some embodiments.

[0023] Figure 15 A table for indicating a reduced set of ports is illustrated according to some embodiments.

[0024] Figure 16 Four CDM groups are illustrated that may be selected to reduce 32 ports to two ports according to some embodiments.

[0025] Figure 17 Four CDM groups are illustrated that may be selected to reduce 32 ports to four ports according to some embodiments.

[0026] Figure 18 Four CDM groups are illustrated that may be selected to reduce 32 ports to 8 ports according to some embodiments.

[0027] Figure 19 One CDM group that may be selected to reduce 32 ports to 12 ports is illustrated according to some embodiments.

[0028] Figure 20 Illustrated are two CDM groups that may be selected to reduce 32 ports to 16 ports according to some embodiments.

[0029] Figure 21One CDM group that may be selected to reduce 32 ports to 24 ports is illustrated according to some embodiments.

[0030] Figure 22 Two ways in which 32 ports can be reduced to 16 ports according to some embodiments are illustrated.

[0031] Figure 23 A CSI-ReportConfig information element is illustrated having information about spatially adaptive related CSI reporting in addition to the original CSI report according to some embodiments.

[0032] Figure 24 A flow chart illustrating a method for a network node according to embodiments herein is illustrated.

[0033] Figure 25 A flowchart of a method for a UE according to an embodiment of this document is illustrated.

[0034] Figure 26 An example architecture of a wireless communication system according to the embodiments disclosed herein is illustrated.

[0035] Figure 27 A system for performing signaling between a wireless device and a network device according to embodiments disclosed herein is illustrated. DETAILED DESCRIPTION

[0036] Various embodiments are described with reference to user equipment (UE). However, reference to UE is provided for illustrative purposes only. Example embodiments may be used with any electronic component that can establish a connection with a network and is configured with hardware, software, and / or firmware for exchanging information and data with the network. Therefore, as described herein, UE is intended to represent any suitable electronic component.

[0037] One of the goals in wireless communication networks is energy reduction. Energy usage can be reduced both on the UE side and on the network node side. One of the goals of Release 18 of the 3rd Generation Partnership Project (3GPP) is to save energy in the network.

[0038] To save energy, network nodes can use spatial element adaptation. For example, a network node can disable spatial elements associated with logical antenna ports. However, implementing spatial element adaptation requires specific techniques in both the spatial and power domains. Some embodiments herein specify enhancements to channel state information (CSI) and beam management-related processes (e.g., measurement, reporting, and signaling) to enable efficient adaptation of spatial elements (e.g., antenna ports, active transceiver chains).

[0039] Spatial element adaptation can be referred to as transceiver unit (TxRU) reduction because it can limit the number of TxRUs used by a network node. TxRU reduction can be categorized into two types: a network node can control spatial elements at the port level or at the receiver unit level.

[0040] Figure 1A Type 1 TxRU reduction is illustrated. Type 1 TxRU reduction allows a network node to enable / disable all spatial elements (e.g., TxRU 104) associated with a logical antenna port (e.g., port 102). The network node may enable and / or disable a subset of ports of CSI-RS resources.

[0041] In the illustrated example, the network node disables Port 0 and Port 1 and enables Port P. By disabling Port 0 and Port 1, the network node disables all elements associated with Port 0 and Port 1, including TxRU 0, TxRU 1, TxRU 2, and TxRU 3. The UE will then measure CSI reference signals (RS) from a subset of the enabled ports.

[0042] Figure 1B Type 2 TxRU reduction is illustrated. Type 2 TxRU reduction allows a network node to enable / disable a portion of the spatial elements (e.g., TxRU 108) associated with a logical antenna port (e.g., port 106). This may result in changes to the antenna pattern, gain, TCI state, and / or transmit power of the reference signal or channel using the antenna port.

[0043] The UE can measure the CSI-Reference Signal (RS). Due to variations in the spatial filter, the measurements may differ for all TxRUs. TxRU reduction for CSI-RS allows for accurate measurements that can be used by the network node for future transmissions using a reduced number of ports or TxRUs.

[0044] Since these types of TxRU reductions may result in different CSI, it may be desirable to support multiple CSI reports. Multiple CSI reports may include additional CSI reports that reflect the effects of spatial element adaptation. Some embodiments herein provide details of resource configuration and related report configurations to support Figure 1A The above-mentioned type 1 spatial element adaptive multiple CSI reporting is shown.

[0045] Figure 2A portion of a CSI-ReportConfig information element 200 according to some embodiments is illustrated. The network's downlink depends on feedback from the UE. Based on this feedback, the network node makes scheduling decisions. The feedback from the UE includes a CSI report. The network node may transmit a CSI-ReportConfig information element 200 to the UE to configure CSI reporting.

[0046] The CSI-ReportConfig information element 200 includes information for configuring CSI reporting. For example, the illustrated CSI-ReportConfig information element 200 configures resources for channel measurement and interference measurement (e.g., resourcesForChannelMeasurement field 202, csi-IM-ResourcesForInterference field 204). The CSI-ReportConfig information element 200 may also include a type field 206 that configures the report type (e.g., periodic, semi-persistent, or aperiodic).

[0047] The CSI-ReportConfig information element 200 may also configure what the UE is to report in the reportQuantity field 208. For example, the UE may be configured to report channel quality information (CQI), precoding matrix indicator (PMI), and rank indicator (RI). Additional configuration elements may be included in the CSI-ReportConfig information element 200.

[0048] The resourcesForChannelMeasurement field 202 includes a CSI-ResourceConfigId that associates the CSI-ReportConfig information element with the CSI-ResourceConfig information element. The CSI-ResourceConfig information element may define a group of one or more NZP-CSI-RS-ResourceSets, CSI-IM-ResourceSets, and / or CSI-SSB-ResourceSets.

[0049] Figure 3 The CSI-ResourceConfig information element 300 according to some embodiments is illustrated. The CSI-ResourceConfig information element 300 may include a nzp-CSI-RS-ResourceSetList field 302. The nzp-CSI-RS-ResourceSetList field 302 may be used to provide a list of references to nzp CSI-RS resources in a CSI-RS resource set for beam measurement and reporting.

[0050] Figure 4 Illustrated are a CSI resource set information element 402 and a CSI-RS information element 406. The CSI resource set information element 402 may include a plurality of resources. nzp-CSI-RS-Resources Field 404 may include resources associated with the NZP-CSI-RS resource set.

[0051] The resource may be configured with a CSI-RS information element 406. The CSI-RS-Resource information element 406 may include a resourceMapping field 408. The resourceMapping field 408 may provide the Orthogonal Frequency Division Multiplexing (OFDM) symbol location in a slot and subcarrier occupancy in a physical resource block (PRB) of the CSI-RS resource.

[0052] In some implementations, one or more of the CSI-ReportConfig information element 200, the CSI-ResourceConfig information element 300, the CSI resource set information element 402, and the CSI-RS-Resource information element 406 may be modified to support multiple CSI reporting for spatial element adaptation. Figure 5 Potential new elements that may be introduced to support multiple CSI reporting for spatial element adaptation are illustrated.

[0053] To support multiple CSI reports on spatial elements, the network node may provide additional information about the CSI-RS resources for the UE to measure. In some implementations, no new resource setting configuration may be required. These implementations may be used to support Type 1 TxRU reduction, where the UE may measure on the original CSI-RS resources but with different assumptions about the ports. New indications regarding the number of ports to measure and a subset of ports may be introduced.

[0054] The first alternative 502 shows a configuration in which the CSI-ReportConfig information element 200, CSI-ResourceConfig information element 300, CSI resource set information element 402, and CSI-RS-Resource information element 406 may be reused. Furthermore, the first alternative 502 includes additional indications for ports and subsets of ports to be measured.

[0055] In some implementations, new resources may be used for Type 2 TxRU reduction. These new resources may be used due to changes in beam patterns resulting from Type 2 TxRU reduction. Therefore, some implementations may use a single CSI-resourceConfig (e.g., ALT 2-1), a single NZP-CSI-RS-resourceSet (e.g., ALT 2-2), or a single NZP-CSI-RS-Resource to support multiple CSI reports (e.g., ALT 2-3).

[0056] Figures 6 to 11 An example of CSI-RS mapping for different ports is provided. Figures 6 to 11 The current CSI-RS resource configuration in terms of the number of ports and code division multiplexing (CDM) groups for frequency division (fd)-CDM2 is illustrated. Figure 6 A port 2 fd-CDM2 CSI-RS pattern 602, a port 4 fd-CDM2 CSI-RS pattern 604, a port 8 fd-CDM2 CSI-RS pattern 606, and a port 12 fd-CDM2 CSI-RS pattern 608 are illustrated. Figure 7 A port 16 fd-CDM2 CSI-RS pattern 702, a port 24 fd-CDM2 CSI-RS pattern 704, and a port 32 fd-CDM2 CSI-RS pattern 706 are illustrated. Figure 8 Another port 4 fd-CDM2 CSI-RS pattern 802 and a port 8 fd-CDM2 CSI-RS pattern 804 are illustrated. Figure 9 A port 8 CDM4-fd2-TD2 CSI-RS pattern 902, a port 12 CDM4-fd2-TD2 CSI-RS pattern 904, a port 16 CDM4-fd2-TD2 CSI-RS pattern 906, and a port 24 CDM4-fd2-TD2 CSI-RS pattern 908 are illustrated. Figure 10 A port 32 CDM4-fd2-TD2 CSI-RS pattern 1002 is illustrated. Figure 11 A port 24 cdm8-FD2-TD4 CSI-RS pattern 1102 and a port 32 cdm8-FD2-TD4 CSI-RS pattern 1104 are illustrated.

[0057] The embodiments herein provide details on how to configure a subset of ports for CSI-RS. In some embodiments, the network node instructs the UE on the number of ports and / or subsets of ports to measure for spatial element adaptive reporting without configuring additional CSI-RS resources. Spatial element adaptive reporting is a CSI report based on reference signals from a subset of ports used for TxRU reduction. There may be several options for selecting a subset of ports to consider. In some embodiments, the network node may configure multiple ports or multiple CDM groups, and the UE may decide exactly which ports to measure by specific implementation.

[0058] For example, Figure 12 A portion of an NZP-CSI-RS-Resource information element 1200 is illustrated, including a reduced measurement ports field 1202. The reduced measurement ports field 1202 may indicate the number of ports on which the UE is to measure and report CSI. The UE may determine which ports to measure based on the value of the reduced measurement ports field 1202, depending on the implementation. These embodiments provide flexibility to the UE by allowing it to select which ports or CDM groups to measure.

[0059] For example, the network node may encode the NZP-CSI-RS-Resource information element 1200 and indicate the number of ports for reduced TxRU CSI-RS measurement using the Reduced Measurement Ports field 1202. The network node may transmit the NZP-CSI-RS-Resource information element 1200 to the UE. The UE may receive and decode the NZP-CSI-RS-Resource information element 1200 to determine the number of ports that the network node wants the UE to measure based on the Reduced Measurement Ports field 1202. The UE may then select which ports to measure and indicate to the network node the ports that the UE will measure and report. To indicate the number of ports, 3 bits are sufficient to indicate {1, 2, 4, 8, 12, 16, 24} ports.

[0060] Similarly, in some implementations, a field may be introduced in the NZP-CSI-RS-Resource information element 1200 to indicate the number of CDM groups for the UE to measure and report CSI. The network node may indicate the number of CDM groups to the UE, and the UE may select which CDM groups to measure. The UE may indicate to the network node the CDM groups for which the UE will measure and report CSI. To indicate the number of CDM groups, 3 bits are sufficient to indicate {1, 2, 4, 6, 8, 12} groups.

[0061] In some embodiments, port selection is performed on a per-CDM group basis. For example, if a CDM group is selected, all ports within the CDM group are selected for measurement. There may be certain rules that define which specific ports or CDM groups the UE will measure. These rules can make it clear to the network node and the UE which specific ports or CDM groups are being measured.

[0062] In a first embodiment, the network node may transmit a bitmap to the UE indicating the CDM groups to be measured. The bitmap may be 16 bits. In some embodiments, the maximum number of ports to be measured is 32, and the minimum CDM group size for a 32-port configuration is 2. Therefore, there can be a maximum of 16 CDM groups. Therefore, a 16-bit bitmap may be used to directly indicate to the UE which CDM group should be measured and reported.

[0063] In a second embodiment, the network node may indicate the number of groups (n), and the UE may select all ports in the first "n" CDM groups for measurement. The network node may use 4 bits to indicate the number of groups. For example, Figure 13 Four different CDM group selections are illustrated.

[0064] As shown in the figure, when the network indicates the number of groups is four, the UE may select the first four CDM groups 1302 of the 32-port configuration. The UE may use the ports of the selected CDM group (i.e., ports 0-15) to generate CSI reports for spatial element adaptation. When the network indicates the number of groups is six, the UE may select the first six CDM groups 1306 of the 32-port configuration. The UE may use the ports of the selected CDM group (i.e., ports 0-23) to generate CSI reports for spatial element adaptation. When the network indicates the number of groups is four, the UE may select the first four CDM groups 1304 of the 24-port configuration. The UE may use the ports of the selected CDM group (i.e., ports 0-15) to generate CSI reports for spatial element adaptation. When the network indicates the number of groups is two, the UE may select the first two CDM groups 1308 of the 8-port configuration. The UE may use the ports of the selected CDM group (i.e., ports 0-3) to generate CSI reports for spatial element adaptation.

[0065] However, some CDM configurations may not be fully supported. For example, the first six CDM groups 1306 illustrate reducing 32 ports to 24 ports. The resulting configuration shown when the first six CDM groups are selected is not a currently existing mode. The UE may need to use additional processing power to measure this configuration.

[0066] Therefore, in some embodiments, the UE and the network node may use additional principles to determine what pattern of CDM groups to use to identify the ports to measure.For example, the network node may use 4 bits to indicate the number of CDM groups (n).

[0067] If the selected ports form a pattern as an existing CSI-RS pattern, the UE may select all ports in the first "n" CDM groups for measurement. For example, Figure 13 The CDM group 1302 and CDM group 1308 correspond to Figures 6 and 7 If the first “n” CDM groups do not form an existing CSI-RS pattern, the UE may adapt the pattern to the existing CSI-RS pattern (e.g., Figures 6 to 11 In some implementations, the adjusted CSI-RS pattern should include the lowest starting port index / CDM index.

[0068] For example, to reduce the number of ports from 32 to 24, the mode can be adjusted as follows: Figure 14 The adjusted pattern 1402 is shown, which is the existing configuration. The ability for the UE to adjust the CSI-RS pattern can be beneficial. For example, one potential benefit is that the UE can use existing 24-port processing, which can save some orthogonal cover code (OCC) despreading. Furthermore, this can be beneficial for the network node because it provides CSI results that are closer to the actual configuration that the network node can use for reconfiguration. Therefore, the measurement can provide more accurate results for future transmissions using TxRU reduction by the network node.

[0069] Additionally, if adjustment is not possible, the following may be considered. In some embodiments, the UE may select the first "n" CDM groups for measurement even if the first "n" CDM groups do not constitute an existing CSI-RS pattern. For example, Figure 13 The CDM groups 1304 illustrate that the UE may not be able to select a configuration of four CDM groups that align with an existing CSI-RS pattern. However, even though the selected pattern shown may not be optimal, the UE may still measure and report CSI for the first four ports. In some embodiments, it is not desirable for the UE to be configured with a number "n" of CDM groups that do not constitute an existing CSI-RS pattern. The network node may not request the UE to configure CSI measurements for certain combinations.

[0070] In some embodiments, a table can be used to indicate the CDM groups that the UE should measure. For example, the network can transmit an indication to the UE that signals which of the CDM groups the UE should measure based on the table. By using this table, the CDM groups selected for measurement do not need to be the first "n" groups. This can allow for greater measurement diversity.

[0071] Predefined tables can be configured for different CSI-RS resources. For example, Figures 6 to 11The configurations shown in FIGURE 1 may each have a table. These tables may identify one or more CDM groups for multiple TxRU reductions using different numbers of ports. The network node may indicate a value from the table to indicate which CDM group the UE should use. This value may be based on the number of reduced ports and may be 4 bits or less.

[0072] Figure 15 Table 1500 is illustrated for indicating a reduced port set according to some embodiments. Table 1500 provides an example of CDM groups to be measured if the original CSI-RS resource is 32 ports with fd-CDM2. Each row may list the number of ports to be measured 1502 and the number of possible groups 1504. In the illustrated table 1500, a total of 16 possible cases are listed for the UE to measure. A 4-bit indication may be sufficient to indicate each of the 16 possible cases. Similar tables may be designed for all other CSI-RS configurations.

[0073] The network can indicate the index from table 1500, and the UE will understand which ports to use for CSI-RS measurement. Table 1500 can provide the UE with more measurement diversity than the previously described options for measurement, because in the previously described options, the UE mainly selects based on the CDM group, but if the port is very low, the UE may select a port in the first CDM group for measurement and may not be able to measure other resource elements with frequency diversity.

[0074] Figures 16 to 21 Illustrated Figure 15 The potential configurations are listed in Table 1500. Figure 16 Four CDM groups that can be selected to reduce 32 ports to two ports are illustrated. The network node can use table 1500 to indicate to the UE whether to use CDM group 0 1604, CDM group 5 1606, CDM group 10 1608, or CDM group 15 1602. The CDM group to be selected can be aligned with an existing pattern (e.g., existing pattern 1610).

[0075] Figure 17 Four CDM groups that can be selected to reduce 32 ports to four ports are illustrated. The network node can use table 1500 to indicate to the UE whether to use CDM groups 0-1 1702, CDM groups 6-7 1706, CDM groups 8-9 1708, or CDM groups 14-15 1706. The CDM groups to be selected can be aligned with an existing pattern (e.g., existing pattern 1710).

[0076] Figure 18Four CDM groups that can be selected to reduce 32 ports to 8 ports are illustrated. The network node can use table 1500 to indicate to the UE whether to use CDM groups 0-3 1802, CDM groups 4-7 1804, CDM groups 8-11 1806, or CDM groups 12-15 1808. The CDM groups to be selected can be aligned with an existing pattern (e.g., existing pattern 1810).

[0077] Figure 19 It illustrates one CDM group that may be selected to reduce 32 ports to 12 ports.The network node may use the table 1500 to indicate to the UE to use CDM groups 0-6 1902.

[0078] Figure 20 Illustrated are two CDM groups that may be selected to reduce 32 ports to 16 ports.The network node may use table 1500 to indicate to the UE whether to use CDM groups 0-8 2002 or CDM groups 9-17 2004.

[0079] Figure 21 Illustrated is one CDM group that may be selected to reduce 32 ports to 24 ports.The network node may use table 1500 to indicate to the UE that CDM groups 0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, and 14 (ie, CDM group 1902) are used.

[0080] In some embodiments, the ports to be measured and reported by the UE may be selected on a per-port basis rather than a per-CDM group basis. If ports in a CDM group are selected, then not all ports within the CDM group need be selected. The ports to be measured and reported CSI-RS may be selected in various ways.

[0081] For example, in some embodiments, a bitmap may be used to represent ports. The bitmap may be 32 bits. The network node may set bits of the bitmap to indicate which of these ports should be used for CSI-RS measurement and reporting. The network node may transmit the bitmap to the UE, and the UE may use the bitmap to configure CSI-RS measurement and reporting.

[0082] In some implementations, the network node indicates the number of ports (n), and the UE selects the first "n" ports for measurement. The indication can be 4 bits. However, selecting the first "n" ports may result in a situation where the CSI-RS pattern does not align with the existing pattern.

[0083] Therefore, in some embodiments, the UE and the network node may use additional principles to determine which ports to measure. For example, the network node may use 4 bits in the NZP-CSI-RS-Resource information element to indicate the number of ports (n). If the selected ports form a pattern that is an existing CSI-RS pattern, the UE may select all ports in the first "n" ports for measurement. If the first "n" ports do not form an existing CSI-RS pattern, the UE may adjust the pattern to the existing CSI-RS pattern. In some embodiments, the adjusted CSI-RS pattern should include the lowest starting port index / CDM index.

[0084] For example, Figure 22 Two ways to reduce the number of ports from 32 to 16 are illustrated. A first reduced CSI-RS pattern 2202 and a second reduced CSI-RS pattern 2204 are shown. The first reduced CSI-RS pattern 2202 is selected because it represents the first 16 ports. However, the first reduced CSI-RS pattern 2202 does not align with the existing pattern. Instead, the UE can adjust the pattern to the existing pattern, such as the second reduced CSI-RS pattern 2204, where the lowest port is 0.

[0085] Additionally, if adjustments cannot be made, the following may be considered. In some embodiments, the UE may select the first "n" ports for measurement even if the first "n" ports do not constitute an existing CSI-RS pattern. In some embodiments, it is not desirable for the UE to be configured with a number "n" of ports that do not constitute an existing CSI-RS pattern. The network node may not request the UE to configure CSI measurements for certain combinations.

[0086] In some embodiments, the network node may indicate the ports for the UE to measure from a table. This indication may be 4 bits or less. This indication may identify a different grouping of ports listed in the table. The ports in the group may not be the first "n" ports, which may result in more measurement diversity.

[0087] The indications described herein (e.g., number of CDMs, bitmap of CDMs, CDM table indication, number of ports, bitmap of ports, port table indication) may be per resource, per resource set, per resourceConfig, or per reportConfig. In some embodiments, the indication may be configured in a MAC control element (CE). In some embodiments, the indication may be configured in a radio resource control (RRC), where the MAC-CE is used to activate the measurement change.

[0088] In some implementations, a new ReportConfig information element may be introduced for reporting CSI related to spatial element adaptation. The use of the new ReportConfig information element may have an impact on UE capabilities.

[0089] In some implementations, multiple CSI reports may be introduced. For example, spatial adaptation-related CSI reports may be added to the same CSI-ReportConfig information element as the original CSI report before spatial adaptation. A new field / indication may be introduced in the CSI-ReportConfig to indicate the number of reports to be added in the reportConfig, where the UE reports the same or different reportQuantity as the original report.

[0090] For example, Figure 23 The CSI-ReportConfig information element 2300 is illustrated as including information regarding spatially adaptive related CSI reporting in addition to the original CSI report. As shown, the CSI-ReportConfig information element 2300 may include an nrofreportToAdd field 2302, which indicates the number of reports to be added in the reportConfig. If the nrofreportToAdd field 2302 is configured / enabled, the UE may report additional reports in a single reportConfig. If no new report fields are configured, the UE may use the same reportQuantity as the original report with the same time-domain behavior.

[0091] However, for additional control, new reporting fields may be included in the CSI-ReportConfig information element 2300. For example, the CSI-ReportConfig information element 2300 may also include a reportQuantityForTXRU reduction field 2304. The reportQuantityForTXRU reduction field 2304 may include the desired measurement for spatial adaptation related CSI reporting. In some embodiments, additional reportQuantities may be configured for additional reporting to reduce CSI reporting overhead. For example, only cri-RI-CQI or cri-RSRP may be requested for additional reporting. In some embodiments, after receiving a coarse CSI report for spatial adaptation, the network node may configure a subsequent more detailed report.

[0092] Figure 24A flow chart illustrating a method 2400 for a network node according to embodiments herein is provided. The method 2400 includes configuring 2402 a first channel state information reference signal (CSI-RS) resource having a first number of ports, wherein for a first CSI report linked to a CSI report setup, at least a subset of the ports or a second number of ports of the first CSI-RS resource are indicated for a user equipment (UE). The method 2400 also includes transmitting 2404 the CSI report setup to the UE. The method 2400 also includes transmitting 2406 the CSI-RS to the UE. The method 2400 also includes receiving 2408 a first CSI-RS report from the UE including CSI measurements for the subset of the ports of the CSI-RS.

[0093] In some implementations of method 2400, the network node indicates a number of ports or code division multiplexing (CDM) groups to use for the first CSI report.

[0094] In some embodiments, method 2400 further includes receiving, from the UE, a selection of a port or CDM group to be used for the first CSI-RS report.

[0095] In some embodiments of method 2400, the subset of ports is selected from the first n CDM groups or the first n ports, where n is equal to a number indicated by the network.

[0096] In some implementations of the method 2400, if the pattern of the subset of ports does not form an existing CSI-RS pattern, the subset of ports is adjusted.

[0097] In some embodiments, the method 2400 further includes encoding a bitmap indicating the CDM groups or ports to be used for the first CSI-RS report.

[0098] In some embodiments of method 2400, the network node indicates a reference to an index of a table, wherein the table defines one or more CDM groups or port groups.

[0099] In some implementations of the method 2400, the CSI reporting setup includes configuration details for original CSI reporting using all ports of the network node and configuration details for first CSI-RS reporting using a subset of the ports.

[0100] In some implementations of method 2400, the configuration details of the first CSI-RS report include a reportQuantity field indicating CSI measurements for a subset of ports.

[0101]

[00116] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of method 2400. The apparatus may be, for example, a base station, such as network device 2718 (base station), as described herein.

[0102] Embodiments contemplated herein include one or more non-transitory computer-readable media including instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 2400. The non-transitory computer-readable medium may be, for example, a memory of a base station (such as memory 2722 of network device 2718 (base station), as described herein).

[0103] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuits operable to perform one or more elements of method 2400. The apparatus may be, for example, a base station, such as network device 2718 (base station), as described herein.

[0104] Embodiments contemplated herein include an apparatus comprising one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 2400. The apparatus may be, for example, a base station, such as network device 2718 (base station), as described herein.

[0105] Implementations contemplated herein include signals as described in or related to one or more elements of method 2400 .

[0106] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processing element causes the processing element to perform one or more elements of method 2400. The processor may be a processor of a base station (such as processor 2720 of network device 2718 (base station), as described herein). These instructions may be located, for example, in the processor and / or in a memory of the base station (such as memory 2722 of network device 2718 (base station), as described herein).

[0107] Figure 25A flow chart illustrating a method 2500 according to an embodiment of the present invention is provided. The illustrated method 2500 includes receiving 2502 a first channel state information reference signal (CSI-RS) resource having a first number of ports from a network node, wherein for a first CSI report linked to a CSI report setup, at least a subset of the ports or a second number of ports of the first CSI-RS resource is indicated. The illustrated method 2500 includes measuring 2504 a CSI-RS from the subset of ports from the network node, and transmitting 2506 a first CSI-RS report to the network node, the first CSI-RS report including CSI measurements for the subset of ports of the CSI-RS.

[0108] In some implementations of method 2500, the network node indicates a number of ports or code division multiplexing (CDM) groups to use for the first CSI report.

[0109] In some embodiments, method 2500 further includes selecting a port or CDM group to be used for the first CSI-RS report.

[0110] In some embodiments of method 2500, the subset of ports is selected from the first n CDM groups or the first n ports, where n is equal to a number indicated by the network.

[0111] In some implementations of the method 2500, if the pattern of the subset of ports does not form an existing CSI-RS pattern, the subset of ports is adjusted.

[0112] In some embodiments, the method 2500 further includes encoding a bitmap indicating the CDM groups or ports to be used for the first CSI-RS report.

[0113] In some embodiments of method 2500, the network node indicates a reference to an index of a table, wherein the table defines one or more CDM groups or port groups.

[0114] In some embodiments of the method 2500, the CSI reporting setup includes configuration details for original CSI reporting using all ports of the network node and configuration details for first CSI-RS reporting using a subset of the ports.

[0115] In some implementations of method 2500, the configuration details of the first CSI-RS report include a reportQuantity field indicating CSI measurements for a subset of ports.

[0116]

[00116] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of method 2500. The apparatus may be, for example, an apparatus such as a UE, such as wireless device 2702 (UE), as described herein.

[0117] Embodiments contemplated herein include one or more non-transitory computer-readable media including instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 2500. The non-transitory computer-readable medium may be, for example, a memory of a UE (such as memory 2706 of wireless device 2702 (UE), as described herein).

[0118] Embodiments contemplated herein include an apparatus comprising logical components, modules, or circuits operable to perform one or more elements of method 2500. The apparatus may be, for example, an apparatus such as a UE, such as wireless device 2702 (UE), as described herein.

[0119] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 2500. The apparatus may be, for example, a UE, such as wireless device 2702 (UE), as described herein.

[0120] Implementations contemplated herein include signals as described in or related to one or more elements of method 2500 .

[0121] Embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processor causes the processor to perform one or more elements of the method 2500. The processor may be a processor of a UE (such as the processor 2704 of the wireless device 2702 (UE), as described herein). The instructions may reside, for example, in the processor and / or in a memory of the UE (such as the memory 2706 of the wireless device 2702 (UE), as described herein).

[0122] Figure 26 An example architecture of a wireless communication system 2600 according to the embodiments disclosed herein is illustrated. The following description is provided for an example wireless communication system 2600 operating in conjunction with the LTE system standard and / or the 5G or NR system standard provided in the 3GPP technical specifications.

[0123] like Figure 26As shown, wireless communication system 2600 includes UE 2602 and UE 2604 (although any number of UEs may be used). In this example, UE 2602 and UE 2604 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices capable of connecting to one or more cellular networks), but may include any mobile or non-mobile computing device configured for wireless communication.

[0124] UE 2602 and UE 2604 may be configured to be communicatively coupled to RAN 2606. In an embodiment, RAN 2606 may be an NG-RAN, E-UTRAN, or the like. UE 2602 and UE 2604 utilize connections (or channels) with RAN 2606 (shown as connection 2608 and connection 2610, respectively), where each connection (or channel) includes a physical communication interface. RAN 2606 may include one or more base stations (such as base station 2612 and base station 2614) that implement connection 2608 and connection 2610.

[0125] In this example, connection 2608 and connection 2610 are the air interfaces that enable such communicative coupling and may conform to the RAT used by RAN 2606, such as, for example, LTE and / or NR.

[0126] In some embodiments, UE 2602 and UE 2604 may also directly exchange communication data via side link interface 2616. UE 2604 is shown as being configured to access an access point (shown as AP 2618) via connection 2620. For example, connection 2620 may include a local wireless connection, such as a connection compliant with any IEEE 802.11 protocol, where AP 2618 may include a Wi-Fi ® In this example, AP 2618 may not be connected to another network (eg, the Internet) through CN 2624.

[0127] In an embodiment, UE 2602 and UE 2604 may be configured to communicate with each other or with base station 2612 and / or base station 2614 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals in accordance with various communication techniques, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication techniques (e.g., for downlink communication) or single-carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink communication), although the scope of the embodiments is not limited in this respect. An OFDM signal may include multiple orthogonal subcarriers.

[0128] In some embodiments, all or part of base station 2612 or base station 2614 may be implemented as one or more software entities running on a server computer as part of a virtual network. Additionally, or in other embodiments, base station 2612 or base station 2614 may be configured to communicate with each other via interface 2622. In embodiments where wireless communication system 2600 is an LTE system (e.g., when CN 2624 is an EPC), interface 2622 may be an X2 interface. This X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to an EPC and / or between two eNBs connected to an EPC. In embodiments where wireless communication system 2600 is an NR system (e.g., when CN 2624 is a 5GC), interface 2622 may be an Xn interface. This Xn interface may be defined between two or more base stations (e.g., two or more gNBs, etc.) connected to a 5GC, between base station 2612 (e.g., a gNB) and an eNB connected to a 5GC, and / or between two eNBs connected to a 5GC (e.g., CN 2624).

[0129] RAN 2606 is shown as being communicatively coupled to CN 2624. CN 2624 may include one or more network elements 2626 configured to provide various data and telecommunication services to customers / subscribers (e.g., UE 2602 and users of UE 2604) connected to CN 2624 via RAN 2606. Components of CN 2624 may be implemented in one physical device or separate physical devices that include components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0130] In an embodiment, CN 2624 may be an EPC, and RAN 2606 may be connected to CN 2624 via an S1 interface 2628. In an embodiment, S1 interface 2628 may be divided into two parts: an S1 user plane (S1-U) interface, which carries traffic data between base station 2612 or base station 2614 and a serving gateway (S-GW); and an S1-MME interface, which is a signaling interface between base station 2612 or base station 2614 and a mobility management entity (MME).

[0131] In an embodiment, CN 2624 may be a 5GC, and RAN 2606 may be connected to CN 2624 via an NG interface 2628. In an embodiment, NG interface 2628 may be divided into two parts: an NG user plane (NG-U) interface, which carries traffic data between base station 2612 or base station 2614 and a user plane function (UPF); and an S1 control plane (NG-C) interface, which is a signaling interface between base station 2612 or base station 2614 and an access and mobility management function (AMF).

[0132] Generally speaking, the application server 2630 may be a component that provides applications (e.g., packet-switched data services) that utilize Internet Protocol (IP) bearer resources with the CN 2624. The application server 2630 may also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for the UE 2602 and UE 2604 via the CN 2624. The application server 2630 may communicate with the CN 2624 via an IP communication interface 2632.

[0133] Figure 27 A system 2700 is illustrated for performing signaling 2734 between a wireless device 2702 and a network device 2718 according to embodiments disclosed herein. System 2700 can be part of a wireless communication system as described herein. Wireless device 2702 can be, for example, a UE of the wireless communication system. Network device 2718 can be, for example, a base station (e.g., an eNB or gNB) of the wireless communication system.

[0134] The wireless device 2702 may include one or more processors 2704. The processor 2704 may execute instructions to perform various operations for the wireless device 2702, as described herein. The processor 2704 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof, configured to perform the operations described herein.

[0135] The wireless device 2702 may include a memory 2706. The memory 2706 may be a non-transitory computer-readable storage medium that stores instructions 2708, which may include, for example, instructions executed by the processor 2704. The instructions 2708 may also be referred to as program code or a computer program. The memory 2706 may also store data used by the processor 2704 and results computed by the processor.

[0136] The wireless device 2702 may include one or more transceivers 2710, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses an antenna 2712 of the wireless device 2702 to facilitate signaling (e.g., signaling 2734) to and / or from the wireless device 2702 and other devices (e.g., network device 2718) in accordance with a corresponding RAT.

[0137] Wireless device 2702 may include one or more antennas 2712 (e.g., one, two, four, or more). For implementations with multiple antennas 2712, wireless device 2702 may leverage the spatial diversity of these multiple antennas 2712 to transmit and / or receive multiple different data streams over the same time-frequency resources. This behavior may be referred to as, for example, multiple-input, multiple-output (MIMO) behavior (referring to the multiple antennas used at each of the transmitting and receiving devices to implement this aspect). MIMO transmission by wireless device 2702 may be implemented based on precoding (or digital beamforming) applied to wireless device 2702, which multiplexes the data streams across antennas 2712 based on known or assumed channel characteristics, such that each data stream is received at an appropriate signal strength relative to the other streams and at a desired location in the spatial domain (e.g., the location of the receiver associated with that data stream). Certain embodiments may use single-user MIMO (SU-MIMO) methods (where data streams are all directed to a single receiver) and / or multi-user MIMO (MU-MIMO) methods (where separate data streams may be directed to separate (different) receivers in different locations in the spatial domain).

[0138] In certain embodiments with multiple antennas, the wireless device 2702 may implement analog beamforming techniques whereby the phases of the signals transmitted by the antennas 2712 are adjusted relative to each other so that the (joint) transmissions of the antennas 2712 can be directed (this is sometimes referred to as beam steering).

[0139] The wireless device 2702 may include one or more interfaces 2714. The interfaces 2714 may be used to provide input to or output from the wireless device 2702. For example, the wireless device 2702 (UE) may include interfaces 2714, such as a microphone, a speaker, a touch screen, and buttons, to allow a user of the UE to provide input to and / or output to the UE. Other interfaces of such a UE may be composed of transmitters, receivers, and other circuits (e.g., in addition to the transceiver 2710 / antenna 2712 already described) that allow communication between the UE and other devices, and may be based on known protocols (e.g., Wi-Fi). ® and Bluetooth ® etc.) to perform the operation.

[0140] The wireless device 2702 may include a multiple CSI reporting module 2716. The multiple CSI reporting module 2716 may be implemented via hardware, software, or a combination thereof. For example, the multiple CSI reporting module 2716 may be implemented as a processor, circuitry, and / or instructions 2708 stored in the memory 2706 and executed by the processor 2704. In some examples, the multiple CSI reporting module 2716 may be integrated within the processor 2704 and / or the transceiver 2710. For example, the multiple CSI reporting module 2716 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 2704 or the transceiver 2710.

[0141] The multi-CSI reporting module 2716 may be used in various aspects of the present disclosure. The multi-CSI reporting module 2716 is configured to generate spatial element adaptive CSI reports.

[0142] The network device 2718 may include one or more processors 2720. The processors 2720 may execute instructions to perform various operations for the network device 2718, as described herein. The processors 2720 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0143] Network device 2718 may include memory 2722. Memory 2722 may be a non-transitory computer-readable storage medium that stores instructions 2724 (which may include, for example, instructions executed by processor 2720). Instructions 2724 may also be referred to as program code or a computer program. Memory 2722 may also store data used by processor 2720 and results computed by the processor.

[0144] The network device 2718 may include one or more transceivers 2726, which may include RF transmitter and / or receiver circuitry that uses an antenna 2728 of the network device 2718 to facilitate signaling (e.g., signaling 2734) to and / or from the network device 2718 and other devices (e.g., wireless device 2702) according to a corresponding RAT.

[0145] The network device 2718 may include one or more antennas 2728 (e.g., one, two, four, or more). In embodiments with multiple antennas 2728, the network device 2718 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as described.

[0146] The network device 2718 may include one or more interfaces 2730. The interfaces 2730 may be used to provide input to or output from the network device 2718. For example, the network device 2718 (base station) may include an interface 2730 comprised of a transmitter, a receiver, and other circuitry (e.g., in addition to the transceiver 2726 / antenna 2728 already described) that enables the base station to communicate with other equipment in the core network and / or enables the base station to communicate with external networks, computers, databases, etc., for the purpose of operating, managing, and maintaining the base station or other equipment operatively connected to the base station.

[0147] The network device 2718 may include a multiple CSI report configuration module 2732. The multiple CSI report configuration module 2732 may be implemented via hardware, software, or a combination thereof. For example, the multiple CSI report configuration module 2732 may be implemented as a processor, circuitry, and / or instructions 2724 stored in the memory 2722 and executed by the processor 2720. In some examples, the multiple CSI report configuration module 2732 may be integrated within the processor 2720 and / or the transceiver 2726. For example, the multiple CSI report configuration module 2732 may be implemented within the processor 2720 or the transceiver 2726 via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuits).

[0148] The multiple CSI report configuration module 2732 may be used in various aspects of the present disclosure. The multiple CSI report configuration module 2732 is configured to configure the UE for CSI-RS spatial element adaptive reporting.

[0149] For one or more embodiments, at least one of the components described in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor as described herein in conjunction with one or more of the preceding figures may be configured to operate according to one or more of the examples described herein. For another example, circuitry associated with a UE, base station, network element, or the like as described above in conjunction with one or more of the preceding figures may be configured to operate according to one or more of the examples described herein.

[0150] Unless expressly stated otherwise, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise forms disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of the various embodiments.

[0151] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine-executable instructions to be executed by a computer system. A computer system may include one or more general-purpose or special-purpose computers (or other electronic devices). A computer system may include hardware components that include specific logic for performing the operations, or may include a combination of hardware, software, and / or firmware.

[0152] It should be appreciated that the systems described herein include descriptions of specific embodiments. These embodiments can be combined into a single system, partially combined into other systems, separated into multiple systems, or otherwise divided or combined. In addition, it is contemplated that parameters, attributes, aspects, etc. of one embodiment may be used in conjunction with another embodiment. For clarity, these parameters, attributes, aspects, etc. are described only in relation to one or more embodiments, and it should be appreciated that these parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless expressly stated otherwise herein.

[0153] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of authorized use should be clearly stated to users.

[0154] Although the foregoing has been described in considerable detail for purposes of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles of the invention. It should be noted that there are many alternative ways of implementing both the processes and the apparatus described herein. The embodiments of the present invention are therefore to be considered illustrative and not restrictive, and the description is not to be limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.

Claims

1. A method for a network node, the method comprising: configuring a first channel state information reference signal (CSI-RS) resource having a first number of ports, wherein for a first CSI report linked to a CSI reporting setup, at least a subset of the ports or a second number of ports of the first CSI-RS resource is indicated for a user equipment (UE); Sending a CSI report configuration information element to the UE; Sending a CSI-RS to the UE; The first CSI-RS report including CSI measurements for the subset of ports of the CSI-RS is received from the UE. 2 . The method according to claim 1 , wherein the network node indicates a number of ports or code division multiplexing (CDM) groups used for the first CSI report.

3. The method of claim 2, further comprising receiving, from the UE, a selection of a port or CDM group to be used for the first CSI-RS report.

4. The method of claim 2, wherein the subset of ports is selected from the first n CDM groups or the first n ports, where n is equal to a number indicated by the network. The method of claim 4 , wherein if the pattern of the subset of ports does not form an existing CSI-RS pattern, adjusting the subset of ports. 6 . The method of claim 1 , further comprising encoding a bitmap indicating CDM groups or ports to be used for the first CSI-RS report.

7. The method of claim 1, wherein the network node indicates a reference to an index of a table, wherein the table defines one or more CDM groups or port groups.

8. The method of claim 1, wherein the CSI reporting settings include configuration details of a second CSI report using the first number of ports and configuration details of the first CSI-RS report using a subset of the ports or the second number of ports. 9 . The method of claim 8 , wherein the configuration details of the first CSI-RS report include a reportQuantity field indicating CSI measurements for a subset of the ports.

10. The method of claim 1 , further comprising configuring a first CSI reporting setting comprising configuration details for a second CSI report using the first number of ports and a second CSI reporting setting comprising configuration details for the first CSI-RS report using a subset of the ports.

11. A method for a UE, the method comprising: receiving, from a network node, a first channel state information reference signal (CSI-RS) resource having a first number of ports, wherein for a first CSI report linked to a CSI reporting setup, at least a subset of the ports or a second number of ports of the first CSI-RS resource is indicated; measuring, from the network node, CSI-RS from a subset of the ports; The first CSI-RS report is transmitted to the network node, the first CSI-RS report including CSI measurements for a subset of the ports of the CSI-RS. 12 . The method of claim 11 , wherein the network node indicates a number of ports or code division multiplexing (CDM) groups for the first CSI report.

13. The method of claim 12, further comprising selecting a port or CDM group to be used for the first CSI-RS report.

14. The method of claim 12, wherein the subset of ports is selected from the first n CDM groups or the first n ports, where n is equal to a number indicated by the network.

15. The method of claim 14, wherein if the pattern of the subset of ports does not form an existing CSI-RS pattern, adjusting the subset of ports.

16. The method of claim 11, further comprising encoding a bitmap indicating a CDM group or port to be used for the first CSI-RS report.

17. The method of claim 11, wherein the network node indicates a reference to an index of a table, wherein the table defines one or more CDM groups or port groups.

18. The method of claim 11, wherein the CSI reporting settings include configuration details of original CSI reporting using all ports of the network node and configuration details of the first CSI-RS reporting using a subset of the ports.

19. The method of claim 18, wherein the configuration details of the first CSI-RS report include a reportQuantity field indicating CSI measurements for a subset of the ports.

20. An apparatus comprising means for performing the method according to any one of claims 1 to 19.

21. A computer-readable medium comprising instructions, which, when executed by one or more processors of an electronic device, cause the electronic device to perform the method according to any one of claims 1 to 19.

22. An apparatus comprising logic components, modules or circuits for performing the method according to any one of claims 1 to 19.

23. A network node comprising: processor; and a memory storing instructions that, when executed by the processor, configure the network node to: configuring a first channel state information reference signal (CSI-RS) resource having a first number of ports, wherein for a first CSI report linked to a CSI reporting setup, at least a subset of the ports or a second number of ports of the first CSI-RS resource is indicated for a user equipment (UE); Sending the CSI report setting to the UE; Sending a CSI-RS to the UE; The first CSI-RS report including CSI measurements for the subset of ports of the CSI-RS is received from the UE.

24. The computing network node of claim 23, wherein the network node indicates a number of ports or code division multiplexing (CDM) groups used for the first CSI report.

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